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Resumen Clostridioides difficile es un anaerobio esporulado que se asocia con episodios de diarreas hospitalarias. Su virulencia se encuentra vinculada, principalmente, a las toxinas TcdA y TcdB, codificadas por sus respectivos genes, tcdA y tcdB, que son parte de un locus de patogenicidad (PaLoc). Nuestro objetivo fue caracterizar los toxinotipos de C. difficile circulantes en un hospital público. Los genes tcdA y tcdB fueron amplificados y digeridos con diferentes enzimas de restricción: EcoRI para tcdA; HincII y AccI para tcdB. Además, se evaluó la presencia de cdtB (gen de la toxina binaria B) y de las toxinas A y B (por dot blot), así como el efecto citotóxico de sobrenadantes de cultivo sobre células Vero. En conjunto, estos estudios revelaron tres toxinotipos circulantes según la clasificación de Rupnik: 0, I y VIII; el más prevalente fue el último. Aunque son necesarios más estudios (ej., secuenciación), es interesante notar que la presencia del toxinotipo I podría estar relacionada con la introducción de bacterias de diferente origen geográfico. En los pacientes infectados con el toxinotipo VIII, el análisis multivariante de los resultados de laboratorio mostró que los aislamientos asociados a decesos (GCD13, GCD14 y GCD22) estaban situados en regiones de los biplots relacionados con valores de laboratorio alterados al momento de la internación. En los otros pacientes, aunque no se observó correlación entre los valores de laboratorio al momento de la internación y la evolución clínica, los niveles de urea, creatinina y recuento de glóbulos blancos estuvieron correlacionados positivamente entre sí una vez diagnosticada la infección. Nuestro estudio revela la circulación de diferentes toxinotipos de C. difficile en un mismo hospital público. La variedad de toxinotipos puede originarse a partir de microorganismos preexistentes en la región, así como también por la introducción de bacterias provenientes de otras regiones geográficas. La existencia de microorganismos con diferente potencial patogénico es relevante para el control, el seguimiento y el tratamiento de las infecciones.

Abstract Clostridioides difficile is a spore-forming anaerobe microorganism associated to nosocomial diarrhea. Its virulence is mainly associated with TcdA and TcdB toxins, encoded by their respective tcdA and tcdB genes. These genes are part of the pathogenicity locus (PaLoc). Our aim was to characterize relevant C. difficile toxinotypes circulating in the hospital setting. The tcdA and tcdB genes were amplified and digested with different restriction enzymes: EcoRI for tcdA; HincII and AccI for tcdB. In addition, the presence of the cdtB (binary toxin) gene, TcdA and TcdB toxins by dot blot and the cytotoxic effect of culture supernatants on Vero cells, were evaluated. Altogether, these studies revealed three different circulating toxinotypes according to Rupnik's classification: 0, I and VIII, being the latter the most prevalent one. Even though more studies are certainly necessary (e.g. sequencing analysis), it is worth noting that the occurrence of toxinotype I could be related to the introduction of bacteria from different geographical origins. The multivariate analysis conducted on the laboratory values of individuals infected with the most prevalent toxinotype (VIII) showed that the isolates associated with fatal outcomes (GCD13, GCD14 and GCD22) are located in regions of the biplots related to altered laboratory values at admission. In other patients, although laboratory values at admission were not correlated, levels of urea, creatinine and white blood cells were positively correlated after the infection was diagnosed. Our study reveals the circulation of different toxinotypes of C. difficile strains in this public hospital. The variety of toxinotypes can arise from pre-existing microorganisms as well as through the introduction of bacteria from other geographical regions. The existence of microorganisms with different pathogenic potential is relevant for the control, follow-up, and treatment of the infections.

https://doi.org/10.1016/j.ram.2022.05.010

[SciELO Preprints] - Guideline of the Brazilian Society of Cardiology on Diagnosis and Treatment of Patients with Chagas Disease Cardiomyopathy
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Marin-Neto, José Antonio Rassi Jr., Anis Moraes Oliveira, Gláucia M. Lemos Correia, Luís Claudio Novaes Ramos Jr., Alberto Hasslocher-Moreno, Alejandro Marcel Luquetti Ostermayer, Alejandro Sousa, Andréa Silvestre de Amato Vincenzo de Paola, Angelo Sobral de Sousa, Antonio Carlos Pinho Ribeiro, Antonio Luiz Correia Filho, Dalmo Moraes de Souza, Dilma do Socorro Cunha-Neto, Edecio J. A. Ramires, Felix Bacal, Fernando Pereira Nunes, Maria do Carmo Martinelli Filho, Martino Ibrahim Scanavacca, Maurício Magalhães Saraiva, Roberto Alves de Oliveira Júnior, Wilson M. Lorga-Filho, Adalberto de Jesus Benevides de Almeida Guimarães, Adriana Lopes Latado Braga, Adriana Sarmento de Oliveira, Adriana V. L. Sarabanda, Alvaro Yecê das Neves Pinto, Ana Assis Lopes do Carmo, André Schmidt, André Costa, Andréa Rodrigues da Ianni, Barbara Maria Markman Filho, Brivaldo Eduardo Rochitte, Carlos Thé Macedo, Carolina Mady, Charles Chevillard, Christophe Bittencourt das Virgens, Cláudio Marcelo Nery de Castro, Cleudson De Paoli de Carvalho Britto, Constança Felícia Pisani, Cristiano do Carmo Rassi, Daniela C. Sobral Filho, Dario Rodrigues Almeida, Dirceu A. Bocchi, Edimar T. Mesquita, Evandro de Souza Nogueira Sardinha Mendes, Fernanda Pereira, Francisca Tatiana Sperandio da Silva, Gilberto Marcelo de Lima Peixoto, Giselle Glotz de Lima, Gustavo H. Veloso, Henrique Turin Moreira, Henrique Bellotti Lopes, Hugo Masciarelli Francisco Pinto, Ibraim Pinto Dias, João Carlos Bemfica, João Marcos Silva-Nunes, João Paulo Soares Barreto-Filho, José Augusto Kerr Saraiva, José Francisco Lannes-Vieira, Joseli Menezes Oliveira, Joselina Luzia V. Armaganijan, Luciana Martins, Luiz Cláudio C. Sangenis, Luiz Henrique Barbosa, Marco Paulo Almeida-Santos, Marcos Antônio Simões, Marcos Vinicius Shikanai-Yasuda, Maria Aparecida Vieira Moreira, Maria da Consolação Higuchi, Maria de Lourdes Costa Monteiro, Maria Rita de Cássia Felix Mediano, Mauro Felippe Maia Lima, Mayara T. Oliveira, Maykon Moreira Dias Romano , Minna Nitz, Nadjar de Tarso Jorge Medeiros, Paulo Vieira Alves, Renato Alkmim Teixeira, Ricardo Coury Pedrosa, Roberto Aras, Roque Morais Torres, Rosália dos Santos Povoa, Rui Manoel Rassi, Sérgio Gabriel Salles Xavier, Sérgio Marinho Martins Alves , Silvia B. N. Tavares, Suelene Lima Palmeira, Swamy da Silva Junior, Telêmaco Luiz da Rocha Rodrigues, Thiago Madrini Junior, Vagner Maia da Costa , Veruska Dutra, Walderez

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Publication date: 2022-10-11

Abstract: En Pt

This guideline aimed to update the concepts and formulate the standards of conduct and scientific evidence that support them, regarding the diagnosis and treatment of the Cardiomyopathy of Chagas disease, with special emphasis on the rationality base that supported it.nbsp; Chagas disease in the 21st century maintains an epidemiological pattern of endemicity in 21 Latin American countries. Researchers and managers from endemic and non-endemic countries point to the need to adopt comprehensive public health policies to effectively control the interhuman transmission of T. cruzi infection, and to obtain an optimized level of care for already infected individuals, focusing on diagnostic and therapeutic opportunistic opportunities. nbsp; Pathogenic and pathophysiological mechanisms of the Cardiomyopathy of Chagas disease were revisited after in-depth updating and the notion that necrosis and fibrosis are stimulated by tissue parasitic persistence and adverse immune reaction, as fundamental mechanisms, assisted by autonomic and microvascular disorders, was well established. Some of them have recently formed potential targets of therapies.nbsp; The natural history of the acute and chronic phases was reviewed, with enhancement for oral transmission, indeterminate form and chronic syndromes. Recent meta-analyses of observational studies have estimated the risk of evolution from acute and indeterminate forms and mortality after chronic cardiomyopathy. Therapeutic approaches applicable to individuals with Indeterminate form of Chagas disease were specifically addressed. All methods to detect structural and/or functional alterations with various cardiac imaging techniques were also reviewed, with recommendations for use in various clinical scenarios. Mortality risk stratification based on the Rassi score, with recent studies of its application, was complemented by methods that detect myocardial fibrosis.nbsp; The current methodology for etiological diagnosis and the consequent implications of trypanonomic treatment deserved a comprehensive and in-depth approach. Also the treatment of patients at risk or with heart failure, arrhythmias and thromboembolic events, based on pharmacological and complementary resources, received special attention. Additional chapters supported the conducts applicable to several special contexts, including t. cruzi/HIV co-infection, risk during surgeries, in pregnant women, in the reactivation of infection after heart transplantation, and others.nbsp; nbsp;nbsp; Finally, two chapters of great social significance, addressing the structuring of specialized services to care for individuals with the Cardiomyopathy of Chagas disease, and reviewing the concepts of severe heart disease and its medical-labor implications completed this guideline.

Esta diretriz teve como objetivo principal atualizar os conceitos e formular as normas de conduta e evidências científicas que as suportam, quanto ao diagnóstico e tratamento da CDC, com especial ênfase na base de racionalidade que a embasou. A DC no século XXI mantém padrão epidemiológico de endemicidade em 21 países da América Latina. Investigadores e gestores de países endêmicos e não endêmicos indigitam a necessidade de se adotarem políticas abrangentes, de saúde pública, para controle eficaz da transmissão inter-humanos da infecção pelo T. cruzi, e obter-se nível otimizado de atendimento aos indivíduos já infectados, com foco em oportunização diagnóstica e terapêutica. Mecanismos patogênicos e fisiopatológicos da CDC foram revisitados após atualização aprofundada e ficou bem consolidada a noção de que necrose e fibrose sejam estimuladas pela persistência parasitária tissular e reação imune adversa, como mecanismos fundamentais, coadjuvados por distúrbios autonômicos e microvasculares. Alguns deles recentemente constituíram alvos potenciais de terapêuticas. A história natural das fases aguda e crônica foi revista, com realce para a transmissão oral, a forma indeterminada e as síndromes crônicas. Metanálises recentes de estudos observacionais estimaram o risco de evolução a partir das formas aguda e indeterminada e de mortalidade após instalação da cardiomiopatia crônica. Condutas terapêuticas aplicáveis aos indivíduos com a FIDC foram abordadas especificamente. Todos os métodos para detectar alterações estruturais e/ou funcionais com variadas técnicas de imageamento cardíaco também foram revisados, com recomendações de uso nos vários cenários clínicos. Estratificação de risco de mortalidade fundamentada no escore de Rassi, com estudos recentes de sua aplicação, foi complementada por métodos que detectam fibrose miocárdica. A metodologia atual para diagnóstico etiológico e as consequentes implicações do tratamento tripanossomicida mereceram enfoque abrangente e aprofundado. Também o tratamento de pacientes em risco ou com insuficiência cardíaca, arritmias e eventos tromboembólicos, baseado em recursos farmacológicos e complementares, recebeu especial atenção. Capítulos suplementares subsidiaram as condutas aplicáveis a diversos contextos especiais, entre eles o da co-infecção por T. cruzi/HIV, risco durante cirurgias, em grávidas, na reativação da infecção após transplante cardíacos, e outros.nbsp;nbsp;nbsp; Por fim, dois capítulos de grande significado social, abordando a estruturação de serviços especializados para atendimento aos indivíduos com a CDC, e revisando os conceitos de cardiopatia grave e suas implicações médico-trabalhistas completaram esta diretriz.nbsp;

https://doi.org/10.1590/SciELOPreprints.4820

Creación del primer biorrepositorio nacional de bacterias multirresistentes disponible para el estudio de la resistencia bacteriana en Chile
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García, Patricia

; Rivas, Lina

; Peters, Anne

; Henríquez, Paola

; Castillo, Loriana

; Illesca, Vijna

; Maripani, Andrea

; Moreno, Juan

; Mühlhauser, Margareta

; Porte, Lorena

; Rioseco, María Luisa

; Rojas, Pamela

; Silva, Francisco

; Suazo, Patricio

; Munita, José M.

Revista chilena de infectología

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oct 2022, Volume 39 N. 5 Pages 623 - 629

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract The availability of bacterial strains for the study of bacterial resistance is key to advances in basic and clinical research. There are few biobanks of bacteria with known resistance mechanisms, isolated from clinically significant infections. A review of the literature reveals that only in the United States of America is there a biobank of resistant isolates. This publication shows the creation of the first biorepository of resistant bacteria Chile associated with the MICROB-R Laboratory Network, with the participation of 11 centers distributed throughout the country, which to date has more than 3,500 bacterial isolates studied phenotypically and genotypically, available to the Chilean scientific community.

Resumen La disponibilidad de cepas bacteriana para el estudio de la resistencia bacteriana es clave para los avances en la investigación básica y clínica respecto del tema. Existen pocos biorrepositorios o bancos de bacterias con mecanismos de resistencia conocidos, aisladas de infecciones clínicamente significativas. Una revisión de la literatura revela que sólo en los Estados Unidos de América existe un biobanco de aislados resistentes disponibles para estudios. En esta publicación se cuenta cómo se creó el primer biorrepositorio de bacterias resistentes en Chile asociados a la Red de Laboratorios MICROB-R, con la participación de 11 centros distribuidos a lo largo del país, que a la fecha cuenta con más de 3.500 aislados bacterianos estudiados fenotípica y genotípicamente, disponibles para la comunidad científica chilena.

Consenso de leucemia mieloide aguda en México
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Arana-Luna, Luara L.

; Alvarado-Ibarra, Martha

; Silva-Michel, Luis G.

; Morales-Maravilla, Adrián

; González-Rubio, María del C.

; Chávez-Aguilar, Lénica A.

; Tena-Iturralde, María Fernanda

; Mojica-Balceras, Liliana

; Zapata-Canto, Nidia

; Galindo-Delgado, Patricia

; Miranda-Madrazo, María Raquel

; Morales-Hernández, Alba E.

; Silva-Vera, Karina

; Grimaldo-Gómez, Flavio A.

; Hernández-Caballero, Álvaro

; Bates-Martin, Ramón A.

; Álvarez-Vera, José L.

; Tepepa-Flores, Fredy

; Teomitzi-Sánchez, Óscar

; Fermín-Caminero, Denisse J.

; Peña-Celaya, José A. de la

; Salazar-Ramírez, Óscar

; Flores-Villegas, Luz V.

; Guerra-Alarcón, Lidia V.

; Leyto-Cruz, Faustino

; Inclán-Alarcón, Sergio I.

; Milán-Salvatierra, Andrea I.

; Ventura-Enríquez, Yanet

; Pérez-Lozano, Uendy

; Báez-Islas, Pamela E.

; Tapia-Enríquez, Ana L.

; Palma-Moreno, Orlando G.

; Aguilar-Luévano, Jocelyn

; Espinosa-Partida, Arturo

; Pérez-Jacobo, Luis F.

; Rojas-Castillejos, Flavio

; Ruiz-Contreras, Josué I.

; Loera-Fragoso, Sergio J.

; Medina-Coral, Jesús E.

; Acosta-Maldonado, Brenda L.

; Soriano-Mercedes, Emely J.

; Saucedo-Montes, Erick E.

; Valero-Saldana, Luis M.

; González-Prieto, Susana G.

; Nava-Villegas, Lorena

; Hernández-Colin, Ana K.

; Hernández-Alcántara, Areli E.

; Zárate-Rodríguez, Pedro A.

; Ignacio-Ibarra, Gregorio

; Meillón-García, Luis A.

; Espinosa-Bautista, Karla A.

; Ledesma de la Cruz, Cindy

; Barbosa-Loría, Diego M.

; García-Castillo, Carolina

; Balderas-Delgado, Carolina

; Cabrera-García, Álvaro

; Pérez-Zúñiga, Juan M.

; Hernández-Ruiz, Eleazar

; Villela-Peña, Atenas

; Gómez Cortés, Sue Cynthia

; Romero-Rodelo, Hilda

; Garzón-Velásquez, Katheryn B.

; Serrano-Hernández, Cristina

; Martínez-Ríos, Annel

; Pedraza-Solís, María Luisa

; Martínez-Coronel, Jorge A.

; Narváez-Davalos, Iris M.

; García-Camacho, Alinka S.

; Merino-Pasaye, Laura E.

; Aguilar-Andrade, Carolina

; Aguirre-Domínguez, Juan A.

; Guzmán-Mera, Pedro G.

; Delgado-de la Rosa, Elizabeth

; Flores López, Perla E.

; González-Aguirre, Lilia L.

; Ramírez-Alfaro, Edgar M.

; Vera-Calderón, Heidi

; Meza-Dávalos, María Lizeth

; Murillo-Cruz, Juan

; Pichardo-Cepín, Yayra M.

; Ramírez-Romero, Eva F.

Gaceta médica de México

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2022, Volume 158 N. spe3 Pages M1 - M51

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract Acute myeloid leukemia (AML) comprises a heterogeneous group of hematopoietic cell neoplasms of myeloid lineage that arise from the clonal expansion of their precursors in the bone marrow, interfering with cell differentiation, leading to a syndrome of bone marrow failure. AML is a consequence of genetic and epigenetic changes (point mutations, gene rearrangements, deletions, amplifications, and arrangements in epigenetic changes that influence gene expression) in hematopoietic precursor cells, which create a clone of abnormal cells that are capable of proliferating but cannot differentiate into mature hematopoietic cells or undergo programmed cell death. The diagnosis requires more than 20% myeloid blasts in the bone marrow and certain cytogenic abnormalities. Treatment will depend on age, comorbidities, and cytogenetic risk among the most frequent.

resumen está disponible en el texto completo

https://doi.org/10.24875/gmm.m21000597 895 downloads

Efficacy of antimicrobial therapy in association with vaccination on the bacteriological cure of subclinical mastitis caused by Staphylococcus aureus in lactating cows
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Garcia, Breno L.N.

; Pinheiro, Eduardo S.C.

; Fidelis, Carlos E.

; Freu, Gustavo

; Leite, Renata F.

; Moreno, Andrea M.

; Santos, Marcos V.

Pesquisa Veterinária Brasileira

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2022, Volume 42 elocation e07064

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: O objetivo deste estudo foi avaliar a eficácia da antibioticoterapia associada à vacinação sobre a taxa de cura microbiológica de mastite subclínica causada por Staphylococcus aureus em vacas leiteiras em lactação. Foram selecionados 5 rebanhos, dos quais 72 vacas (120 quartos mamários, QM) foram diagnosticadas com mastite subclínica por S. aureus e foram alocadas aleatoriamente em um de três grupos de tratamento: a) Controle (sem tratamento); b) ATB (antibioticoterapia); e c) ATB+VAC (antibioticoterapia mais vacinação contra S. aureus). O tratamento intramamário consistiu em infusão de ampicilina 75 mg + cloxacilina 200 mg duas vezes ao dia, durante 5 dias. O tratamento parenteral foi feito por injeção de uma dose única (7,5 mg/kg) de enrofloxacina, no primeiro dia do protocolo de tratamento. As vacas vacinadas receberam três doses de uma vacina comercial, 14 dias antes do tratamento (d-14), no primeiro dia do protocolo de tratamento (d1) e 14 dias após o protocolo de tratamento (d+14). A taxa de cura das vacas não tratadas foi menor (0,06) do que das vacas tratadas com ATB (0,84) e ATB+VAC (0,85). Não foi observada diferença de taxa de cura entre vacas tratadas com ATB e ATB+VAC. Por outro lado, as vacas vacinadas apresentaram menor a contagem de células somáticas (CCS) após 28 dias de tratamento (4,76 log10) do que em vacas não tratadas (5,37 log10). Em conclusão, o tratamento com ampicilina e cloxacilina intramamária, associados à enrofloxacina intramuscular, apresentou alta taxa de cura para MSC causada por S. aureus durante a lactação. A utilização da vacinação contra S. aureus associada à antibioticoterapia não aumentou a taxa de cura dos QM durante a lactação, mas foi eficaz na redução do CCS quando comparada à QM não tratados. Entretanto, para ter certeza que a diminuição da CCS no grupo ATB+VAC estivesse associada à vacinação, o estudo deveria ter incluído um grupo adicional de apenas vacas vacinadas, sem terapia antimicrobiana, o que não foi feito no presente estudo e, portanto, é um das limitações do protocolo experimental utilizado.

ABSTRACT: The objective of this study was to evaluate the efficacy of the antibiotic therapy associated with vaccination on the microbiological cure rate of subclinical mastitis caused by Staphylococcus aureus in lactating dairy cows. A total of five herds, from which 72 cows (120 mammary quarters - MQ) were diagnosed with S. aureus subclinical mastitis, were included in this study. Cows were randomly allocated to one of three treatment groups: a) Control (no treatment); b) ATB (antibiotic therapy); and c) ATB+VAC (antibiotic therapy plus vaccination against S. aureus). Intramammary treatment consisted of twice-daily infusion of ampicillin 75mg + cloxacillin 200mg, for 5 days. Parenteral treatment was done by injection of a single dose (7.5mg/kg) of enrofloxacin, on the first day of the treatment protocol. Vaccinated cows received three doses of a commercial vaccine 14 days before treatment (d-14), on the first day of treatment protocol (d1), and 14 days after the treatment protocol (d+14). Non-treated cows had a lower cure rate (0.06) than cows treated with ATB (0.84) and ATB+VAC (0.85). No difference in cure rate was observed between cows treated with ATB and ATB+VAC. On the other hand, vaccinated cows had lower somatic cell count (SCC) after 28 days of the treatment protocols (4.76 log10) than non-treated cows (5.37 log10). In conclusion, treatment with intramammary ampicillin and cloxacillin, associated with intramuscular enrofloxacin presented a high cure rate for SCM caused by S. aureus during lactation. The use of vaccination against S. aureus in association with antibiotic therapy did not increase the cure rate of MQ during lactation, but it was effective in reducing the SCC when compared to non-treated MQ. Although to ensure that the decrease of the SCC in ATB+VAC group was associated with the vaccination, the study should have included an additional group of only vaccinated cows, without antimicrobial therapy, with was not done in the present study, and therefore is one of the limitations of the experimental protocol used.

https://doi.org/10.1590/1678-5150-pvb-7064

Biosurfactants synthesized by endophytic Bacillus strains as control of Moniliophthora perniciosa and Moniliophthora roreri
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Serrano, Lizette

; Moreno, Andrea Sosa

; Castillo, Daynet Sosa Del

; Bonilla, Julio

; Romero, Christian A

; Galarza, Luis Lenin

; Coronel–León, Jonathan Ricardo

Scientia Agricola

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2021, Volume 78 Suppl. 1 elocation e20200172

Abstract: En | Text: En | PDF: En

ABSTRACT: Ecuador is responsible for up to 70 % of the world’s production of fine flavor cocoa. Although fungal diseases have reduced cocoa production, eco–friendly alternatives have been implemented to control the spread of phytopathogens. This study aimed to explore the potential of endophytic strains isolated from fine flavor Nacional cocoa trees to synthetize compounds with antimicrobial and surface active properties. It was determined that under in vitro conditions, seven strains (DS03, DS07, DS18, DS23, DS31, DS34 and DS50) exhibited antifungal activity that inhibited the mycelial growth of Moniliophthora roreri and Moniliophthora perniciosa. The strains were identified based on their morphological (pattern forming Bacilli) and genetic characteristics using the 16S SSU rRNA gene sequences. Furthermore, we determined that the endophytic strains contained genes that encoded the lipopeptides Fengycin (fenA, fenB, fenC, fenE), Iturin (ituB, ituC, ituD), and Bacyllomicin D (bamC, bamD). The production of biosurfactant compounds was determined by a reduction in surface tension in the mineral medium. Additionally, the biosurfactant crude extract (BCE) was tested for its inhibitory activity against M. perniciosa and M. roreri. The minimal inhibitory concentration (MIC) was determined to be 0.07 and 0.035 mg mL−1, respectively, in both cases in a fungistatic action mode. The swelling granulation and fragmentation of both phytopathogens’ hyphae were observed using the BCE treatment. These results suggested the biocontrol capacity of the endophytic strains, which under in vitro conditions, have the ability to synthesize antifungal and surface active compounds that might be used as an ecological alternative in cocoa plants to prevent infection by phytopathogens.

https://doi.org/10.1590/1678-992x-2020-0172 475 downloads

Consenso mexicano de linfoma de Hodgkin
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Álvarez-Vera, José L.

; Aguilar-Luevano, Jocelyn

; Alcívar-Cedeño, Luisa M.

; Arana-Luna, Luara L.

; Arteaga-Ortiz, Luis

; Báez-Islas, Pamela E.

; Carolina-Reynoso, Ana

; Cesarman-Maus, Gabriela

; Peña-Celaya, José A. De la

; Espitia-Ríos, María E.

; Fermín-Caminero, Denisse J.

; Flores-Patricio, Willy

; García-Camacho, Alinka S.

; Guzmán-Mora, Pedro G.

; Hernández-Colín, Ana K.

; Hernández-Ruiz, Eleazar

; Herrera-Olivares, Wilfrido

; Jacobo-Medrano, Elvia

; Loera-Fragoso, Sergio J.

; Macías-Flores, Juan P.

; Martínez-Ramírez, Mario A.

; Medina-Guzmán, Liliana

; Milán-Salvatierra, Andrea I.

; Montoya-Jiménez, Leire

; Morales-Adrián, Javier de J.

; Mujica-Martínez, Aldo

; Nava-Villegas, Lorena

; Orellana-Garibay, Juan J.

; Palma-Moreno, Orlando G.

; Pérez-Zúñiga, Juan M.

; Pérez-Gómez, Karen D.

; Pichardo-Cepín, Yayra M.

; Rojas-Castillejos, Flavio

; Romero-Martínez, Eduardo

; Romero-Rodelo, Hilda

; Segura-García, Adela

; Silva-Vera, Karina

; Tapía-Enríquez, Ana L.

; Teomitzi-Sánchez, Óscar

; Tepepa-Flores, Fredy

; Vilchis-González, Shendel P.

; Villela-Peña, Atenas

; Guerra-Alarcón, Lidia V.

; Reséndiz-Olea, Rodrigo

; Banda-García, Luisa

; Paredes-Lozano, Eugenia P.

; Alvarado-Ibarra, Martha

Gaceta médica de México

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2021, Volume 157 Suppl. 2 Pages S1 - S18

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract Hodgkin’s lymphoma is due to the clonal transformation of cells originating from B lymphocytes, generating the pathognomonic binucleate Reed-Sternberg cells. Hodgkin’s lymphoma is a B cell disease with a bimodal distribution, with higher incidence in adolescence and the third decade of life, showing a second peak in people over 55 years of age. Classic Hodgkin lymphoma cells routinely undergo gene expression reprogramming, as they lose the expression of most of the typical B-cell genes and acquire the expression of multiple genes that are typical of other types of cells in the immune system. The treatment algorithm will depend on whether it is classic or predominantly lymphocytic HL, if it is early stage with unfavorable prognostic markers or not, the initial management regimen, and whether there is bulky disease, among the most relevant variables.

Resumen El linfoma de Hodgkin (LH) se debe a la transformación clonal de células originadas en los linfocitos B, lo que genera las células binucleadas patognomónicas de Reed-Sternberg. El LH es una enfermedad de células B con una distribución bimodal, con mayor incidencia en la adolescencia y la tercera década de la vida y un segundo pico en personas mayores de 55 años. Las células del LH clásico habitualmente sufren una reprogramación de la expresión génica, ya que pierden la expresión de la mayoría de los genes típicos de las células B y han adquirido la expresión de múltiples genes que son típicos de otros tipos de células del sistema inmunitario. El algoritmo de tratamiento dependerá si se trata de LH clásico o de predominio linfocítico, si es un estadio temprano con marcadores de pronóstico desfavorables o no, el esquema inicial de manejo y si existe enfermedad voluminosa, entre las variables más relevantes.

https://doi.org/10.24875/gmm.m21000500 304 downloads

Números cromosómicos en insectos de Argentina. I. Caracterización citogenética en 15 especies de importancia económica
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Páez, Valeria de los Ángeles

; Andrada, Aldo R.

; Moreno-Ruiz-Holgado, María M.

; Silenzi-Usandivaras, Gabriela M.

; Oviedo, Andrea

; Ruiz-de-Bigliardo, Graciela E.

Revista Colombiana de Entomología

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jun 2020, Volume 46 N. 1 elocation e8536

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen En el presente trabajo se informan los números cromosómicos somáticos y/o gaméticos de 15 especies de insectos presentes en Argentina, que se caracterizan por su importancia económica como plagas de cultivos o controladores de plagas agrícolas, pertenecientes a los siguientes órdenes y familias: Neuroptera, Chrysopidae: Ceraeochrysa cincta (n = 5 + XY), Ceraeochrysa paraguaria (n = 5 + XY), Chrysoperla argentina (n = 5 + XY), Chrysoperla asoralis (n = 5 + XY) , Chrysoperla externa (n = 5 + XY), Leucochrysa cruentata (n = 7 + XY) y Plesiochrysa elongata (n = 5 + XY), Coleoptera, Coccinellidae: Cycloneda sanguinea (n = 9 + XYp), Eriopis connexa (n = 9 + XYp), Harmonia axyridis (n = 7 + XYp), Hippodamia convergens (n = 9 + XYp) y Melyridae: Astylus atromaculatus (n = 8 + XYp), Dermaptera, Forficulidae: Doru lineare (2n = 20), D. luteipes (2n = 20) y Diptera, Ulidiidae: Euxesta eluta (n = 5 + XY). Por primera vez, se cita información cromosómica para seis especies, incluyendo un número cromosómico gamético adicional para Euxesta eluta. Además, se da a conocer en Astylus atromaculatus un número cromosómico diferente a los recuentos previamente reportados.

Abstract In the present study, the somatic and gametic chromosome numbers in fifteen species of insects from Argentina are reported. Said species are characterized for their economic importance as pest of crops or as agricultural pest controllers. The species belonged to the following orders and families: Neuroptera, Chrysopidae: Ceraeochrysa cincta (n = 5 + XY), Ceraeochrysa paraguaria (n = 5 + XY), Chrysoperla argentina (n = 5 + XY), Chrysoperla asoralis (n = 5 + XY), Chrysoperla externa (n = 5 + XY), Leucochrysa cruentata (n = 7 + XY) y Plesiochrysa elongate (n = 5 + XY), Coleoptera, Coccinellidae: Cyclonela sanguinea (n = 9 + XYp), Eriopis connexa (n = 9 + XYp), Harmonia axyridis (n = 7 + XYp), Hippodamia convergens (n = 9 + XYp), y Melyridae: Astylus atromaculatus (n = 8 + XYp), Dermaptera, Forficulidae: Doru lineare (2n = 20) and D. luteipes (2n = 20), Diptera, Ulidiidae: Euxesta eluta (n = 5 + XY). Chromosomal information for six species and additional gametic chromosome number for Euxesta eluta are established for the first time. In addition, a new chromosome number is cited for Astylus atromaculatus that is different to the one previously reported.

https://doi.org/10.25100/socolen.v46i1.8536 417 downloads

Companion psittacine birds as reservoir of gentamicin and vancomycin-resistant Enterococcus spp.
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Cabral, Bruna G.

; Davies, Yamê M.

; Menão, Márcia Cristina

; Saidenberg, Andre B.S.

; Gomes, Vasco Túlio M.

; Moreno, Luisa Z.

; Sato, Maria Inês Z.

; Moreno, Andrea M.

; Knöbl, Terezinha

Pesquisa Veterinária Brasileira

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feb 2020, Volume 40 N. 2 Pages 129 - 133

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: Enterococcus são reconhecidos mundialmente como significantes agentes nosocomiais, que têm continuamente se adaptado a diferentes nichos e adquirido resistência a várias classes de antibióticos. Cepas de E. faecalis e E. faecium vancomicina e gantamicina-resistentes têm sido associadas a infecções nosocomiais em humanos. Alguns estudos epidemiológicos sugerem a participação de aves como reservatórios de cepas de Enterococcus vancomicina e gentamicina-resistentes. Entretanto, a relação das aves de companhia como reservatórios destas cepas tem sido pouco estudada. Neste estudo, 126 psitacídeos foram avaliados, e 26,9% destes eram portadores de Enterococcus spp., incluindo as espécies E. faecalis, E. faecium, E. hirae, E. phoeniculicola, E. gallinarum e E. casseliflavus. O perfil de resistência antibiótica mostrou quatro cepas com alto nível de resistência a gentamicina (ANRG). Além de duas cepas com nível intermediário de resistência a vancomicina. As cepas resistentes foram isoladas de amostras fecais e de orofaringe de aves doentes e clinicamente saudáveis, sugerindo que psitacídeos podem estar atuando como reservatórios para Enterococcus spp. com ANRG. Contudo, Aves doentes parecem estar mais relacionadas à transmissão de enterococcus, do que aves saudáveis.

ABSTRACT: Enterococcus are recognized worldwide as significant nosocomial agents that have been continuously envolving to adapt to different niches and acquire resistance to several antibiotic classes. Vancomycin and gentamicin-resistant strains of E. faecalis and E. faecium have been associated with nosocomial human infections. Some epidemiological studies suggest the participation of pets as reservoirs of vancomycin and gentamicin-resistant Enterococcus strains. However, the role of companion birds as reservoirs of these strains has been poorly studied. In this study, 126 psittacine birds were evaluated and 26.9% carried Enterococcus spp., including the species E. faecalis, E. faecium, E. hirae, E. phoeniculicola, E. gallinarum and E. casseliflavus. The antibiotic resistance profile showed four high-level gentamicin-resistance (HLGR) strains. In addition, two strains presented intermediate levels of vancomycin resistance. Resistant strains were isolated from fecal and oropharynx samples of sick and clinically healthy birds, suggesting that psittacine birds may act as reservoirs of HLGR Enterococcus spp. However, sick birds appear to be more implicated in the enterococci transmission than healthy birds.

https://doi.org/10.1590/1678-5150-pvb-6147 799 downloads

10.

Consenso Mexicano de Mieloma Múltiple
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Peña-Celaya, José A. de la

; Aguilar-Luevano, Jocelyn

; Alcivar-Cedeño, Luisa María

; Álvarez-Vera, José L.

; Anaya-Cuellar, Irene

; Añorve-Hernández, Erika

; Arana-Luna, Luara L.

; Arteaga-Ortíz, Luis

; Báez-Islas, Pamela E.

; Banda-García, Luisa I.

; Bates-Martín, Ramón A.

; Campa-Monroy, Dafne Itzel

; Cardiel-Silva, Mariela

; Castillo-Salas, Ángel de Jesús

; Cota-Rangel, Xóchitl

; Díaz-Vargas, Guillermo

; Espitia-Ríos, M. Eugenia

; Estrada-Domínguez, Patricia

; Fermín-Caminero, Denisse

; García-Camacho, Alinka

; García-Castillo, Carolina

; Garzón-Velásquez, Katheryn B.

; Gil-Rondero, Carlos

; Hernández-Colín, Ana K.

; Hernández-Ruiz, Eleazar

; Hernández-Alcántara, Areli E.

; Hernández-Cervantes, Silvia A.

; Herrera-Olivares, Wilfrido

; Ignacio-Ibarra, Gregorio

; Inclán-Alarcón, Sergio I.

; Leyto-Cruz, Faustino

; Macías-Flores, Juan P.

; Martínez-de la Vega, Andrea

; Martínez-Ramírez, Mario A.

; Martínez-Coronel, Jorge

; Medina-Coral, Jesús E.

; Meza-Dávalos, Lizeth

; Montoya-Jiménez, Leire

; Morales-Hernández, Alba

; Morales-López, Elizabeth

; Morales-Adrián, Javier de Jesús

; Morales-de Azcué, Maricruz

; Mújica-Martínez, Aldo

; Murillo-Cruz, Juan L.

; Nájera-Martínez, Jéssica

; Narváez-Sarmiento, Iris M.

; Nava-Villegas, Lorena

; Nava-Alpide, Marco A.

; Orellana-Garibay, Juan J.

; Palafox-Zaldívar, María Teresa

; Palma-Moreno, Orlando G.

; Paredes-Lozano, Eugenia P.

; Pedraza-Colín, María Luisa

; Pérez-Zúñiga, Juan M.

; Pérez-Lizardi, Alejandra B.

; Rojas-Castillejos, Flavio

; Romero-Martínez, Eduardo

; Romero-Rodelo, Hilda

; Ruiz-Contreras, Josué

; Saavedra-González, Azucena

; Saucedo-Montes, Erick

; Silva-Michel, Luis G.

; Silva-Vera, Karina

; Teomitzi-Sánchez, Óscar

; Tepepa-Flores, Fredy

; Ventura-Enríquez, Yanet

; Villela-Peña, Atenas

; Vilchis-González, Shendel P.

; Zapata-Canto, Nidia

; Zárate-Rodríguez, Pedro A.

; Alvarado-Ibarra, Martha

Gaceta médica de México

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2020, Volume 156 Suppl. 2 Pages 1 - 49

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract To identify this increasingly common pathology, known as Multiple Myeloma, it is necessary to refer to the specific factors that characterize it; to this end, the classic criteria known as CRAB (hypercalcemia, renal failure, anemia and lytic lesions) are available, in which renal failure is one of the most frequent complications. Recently, 3 indisputable biomarkers have been described for the diagnostic support for Multiple Myeloma, which are: more than 10% of clonal plasma cells in BM or, a biopsy that corroborates the presence of a plasmacytoma, light chain ratio ≥100 mg/dL and more than one focal lesion on magnetic resonance imaging (MRI). A differential diagnosis for plasma cell leukemia, solitary bone plasmacytoma, and extramedullary plasmacytoma should always be considered. Being this an incurable disease, a lot of research has been done regarding its therapeutic management, whose main objective is the disappearance of plasma cells and the patient clinical improvement. Melphalan was the first drug that showed a benefit in 1958 and afterwards, with the addition of a steroid as a second drug, it was possible to improve response rates. Subsequently, different molecules were studied, forming multiple combinations, and achieving better rates of Overall Survival and Progression-Free Survival. Years later, with the arrival of proteasome inhibitors such as bortezomib, and immunomodulators such as thalidomide and lenalidomide, an important turnaround in the disease has been seen, as deeper responses, more prolonged remissions, and improvement in the quality of life of patients have been achieved. This consensus has the purpose of integrating a group of Mexican specialists and promoting the updating of this pathology.

resumen está disponible en el texto completo

https://doi.org/10.24875/gmm.m20000392 223 downloads

11.

Evaluation of the transcriptional immune biomarkers in peripheral blood from Warao indigenous associate with the infection by Mycobacterium tuberculosis
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Araujo, Zaida

; Palacios, Andrea

; Enciso-Moreno, Leonor

; Lopez-Ramos, Juan Ernesto

; Wide, Albina

; Waard, Jacobus Henri de

; Rivas-Santiago, Bruno

; Serrano, Carmen Judith

; Bastian-Hernandez, Yadira

; Castañeda-Delgado, Julio Enrique

; Enciso-Moreno, Jose Antonio

Revista da Sociedade Brasileira de Medicina Tropical

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2019, Volume 52 elocation e20180516

Abstract: En | Text: En | PDF: En

Abstract INTRODUCTION: Biomarkers are critical tools for finding new approaches for controlling the spread of tuberculosis (TB), including for predicting the development of TB therapeutics, vaccines, and diagnostic tools. METHODS: Expression of immune biomarkers was analyzed in peripheral blood cells stimulated and non-stimulated with M. tuberculosis antigens ESAT-6, CFP10 and TB7.7. in Warao indigenous individuals. These biomarkers may be able to differentiate TB states, such as active tuberculosis (ATB) cases and latent tuberculosis infection (LTBI) from non-infected controls (NIC). A real-time reverse transcription polymerase chain reaction (RT-qPCR) assay was performed on 100 blood samples under non-stimulation or direct ex vivo conditions (NS=50) and stimulation conditions (S=50). RESULTS: The findings are shown as the median and interquartile range (IQR) of relative gene expression levels of IFN-γ, CD14, MMP9, CCR5, CCL11, CXCL9/MIG, and uPAR/PLAUR immune biomarkers. MMP9 levels were significantly higher in the LTBI-NS and LTBI-S groups compared with the NIC-NS and NIC-S groups. However, CCR5 levels were significantly lower in the LTBI-S group compared with both NIC-NS and NIC-S groups. CCL11 levels were significantly lower in the LTBI-S group compared with the NIC-NS group. CONCLUSIONS: Preliminary findings showed that MMP9 immune biomarkers separated LTBI indigenous individuals from NIC indigenous individuals, while CCR5, CCL11, CD14, and IFN-γ did not differentiate TB states from NIC. MMP9 may be useful as a potential biomarker for LTBI and new infected case detection among Warao indigenous individuals at high risk of developing the disease. It may also be used to halt the epidemic, which will require further validation in larger studies.

https://doi.org/10.1590/0037-8682-0516-2018 1580 downloads

12.

HER2-expressing breast tumors are associated with breast cancer stem-cell phenotype CD44+/CD24-
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Rabinovich, Iris

; Noronha, Lúcia de

; Sebastião, Ana Paula M.

; Lima, Rubens S.

; Urban, Cícero A.

; Schunemann Jr., Eduardo

; Elífio-Esposito, Selene

; Spautz, Cleverton C.

; Moreno-Amaral, Andréa N.

Jornal Brasileiro de Patologia e Medicina Laboratorial

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oct 2018, Volume 54 N. 5 Pages 310 - 318

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO INTRODUÇÃO: De acordo com a teoria das células-tronco tumorais, os tumores são originários de uma pequena população de células-tronco que perdem o mecanismo de autorregulação e começam a se diferenciar e proliferar indefinidamente. O fenótipo CD44+/CD24- pode ser considerado um marcador de células-tronco tumorais no câncer de mama. OBJETIVO: Avaliar a correlação entre o fenótipo CD44+/CD24- e os diferentes subtipos moleculares do câncer de mama em amostras de carcinoma ductal invasor. MÉTODOS: A expressão dos marcadores CD44, CD44v6 e CD24 foi investigada em 133 casos de carcinoma mamário invasor por meio de imuno-histoquímica. O fenótipo CD44+/CD24- foi identificado e correlacionado com os subtipos moleculares e os fatores prognósticos clássicos, como idade, grau histológico, tamanho do tumor e status do linfonodo. RESULTADOS: Dezoito (14%) casos foram positivos para o fenótipo CD44+/CD24- (CD44+/CD24- ou CD44v6+/CD24-), sendo 11, 1%, 27, 8%, 38, 9% e 22, 2% dos subtipos luminal, luminal B-human epidermal growth factor receptor 2 (HER2), HER2 e triplo negativo, respectivamente. O fenótipo CD44+/CD24- foi mais comum no subgrupo HER2 (p = 0, 0197). CONCLUSÃO: O fenótipo CD44+/CD24- foi correlacionado com os subtipos moleculares do câncer de mama. A maior expressão do fenótipo CD44+/CD24- foi encontrada em pacientes com doença HER2+, subtipo molecular associado a um comportamento mais agressivo e a um pior prognóstico.

ABSTRACT INTRODUCTION: According to the cancer stem-cell theory, tumors originate from a small population of cancer stem cells, which lose the mechanism of self-regulation and begin to differentiate and proliferate indefinitely. The CD44+/CD24- phenotype may be considered a stem-cell marker in breast cancer. OBJECTIVE: To evaluate the correlation between CD44+/CD24- phenotype and different molecular subtypes of breast cancer in invasive ductal carcinoma samples. METHODS: The expression of CD44, CD44v6, and CD24 markers was investigated in 133 cases of invasive mammary carcinoma with immunohistochemistry. CD44+/CD24- phenotype was identified and correlated with the molecular subtypes and classical prognostic factors such as age, histological grade, tumor size, and lymph node status. RESULTS: Eighteen (14%) cases were positive for CD44+/CD24- (CD44+/CD24- or CD44v6+/CD24-) phenotype; among these, 11.1%, 27.8%, 38.9%, and 22.2% were luminal, luminal B-human epidermal growth factor receptor 2 (HER2), HER2, and triple-negative subtype, respectively. CD44+/ CD24- phenotype was more common in HER2 subgroup (p = 0.0197). CONCLUSION: CD44+/CD24- phenotype was correlated with molecular subtypes of breast cancer. The highest expression of CD44+/CD24- phenotype was reported in patients with HER2+ disease, a molecular subtype associated with more aggressive behavior and worse prognosis.

https://doi.org/10.5935/1676-2444.20180052 1064 downloads

13.

Characterization of Streptococcus suis through serotyping, SE-AFLP and virulence profile
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Calderaro, Franco F.

; Moreno, Luisa Z.

; Doto, Daniela S.

; Matajira, Carlos E.C.

; Gomes, Vasco T.M.

; Ferreira, Thais S.P.

; Mesquita, Renan E.

; Moreno, Andrea M.

Pesquisa Veterinária Brasileira

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aug 2016, Volume 36 N. 8 Pages 701 - 704

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo: Streptococcus suis é um dos patógenos de maior importância para indústria suinícola mundial. Apesar de sua importância, a caracterização de isolados de S. suis na América do Sul ainda é pouco descrita. O presente estudo descreve a avaliação de isolados de S. suis provenientes de diferentes Estados brasileiros, e sua caracterização sorológica e molecular. Foram avaliados 174 isolados de S. suis e os mesmos foram submetidos a SE-AFLP e pesquisa de marcadores de virulência. Os sorotipos 1, 2, 3, 4, 7, 18, 22 e 32 foram identificados dentre os isolados estudados e apenas 4% foram caracterizados como não tipáveis. O perfil de virulência mrp+/epf+/sly+ foi o mais frequente. A análise do SE-AFLP resultou em 29 perfis distribuídos em três grupos principais com mais de 65% de similaridade genética. Os isolados apresentaram tendência de se agrupar segundo origem e sorotipo; no entanto, não foi observada correlação entre os grupamentos e os perfis de virulência.

Abstract: Streptococcus suis is one of most important pathogens in the swine industry worldwide. Despite its importance, studies of S. suis characterization in South America are still rare. This study evaluates S. suis isolates from distinct Brazilian states, from 1999 to 2004, and its molecular and serological characterization. A total of 174 isolates were studied. S. suis identification was confirmed by PCR and isolates were further serotyped and genotyped by SE-AFLP and amplification of virulence markers. Serotype 1, 2, 3, 4, 7, 18, 22 and 32 were identified among the studied isolates, and only 4% were characterized as non-typeable. The mrp+/epf+/sly+ genotype was the most frequent. The SE-AFLP analysis resulted in 29 patterns distributed in three main clusters with over 65% of genetic similarity. Isolates presented a slight tendency to cluster according to serotype and origin; however, no further correlation with virulence genotypes was observed.

https://doi.org/10.1590/S0100-736X2016000800004 779 downloads

14.

Frecuencia de diferentes tamaños de material particulado en hojas de Morus alba en el arbolado urbano de Mendoza (Argentina)
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Moreno, Gabriela

; Martínez Carretero, Eduardo

; Duplancic, Andrea

; Alcalá, Jorge

Multequina

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jun 2016, Volume 25 N. 1 Pages 05 - 12

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Plants improve the air quality by adsorbing particulate matter (PM) on leaf surfaces. In this study the particulate material deposited on M. alba leaves was evaluated considering location (urban, suburban and periurban) and period of the year (summer, spring, autumn) in the Mendoza city. Gravimetric method was used to obtain particulate material and by optic microscope lecture the frequency of sizes: 2-5 µm, 6-10 µm, 11-18 µm and = 19 µm. In general, fie particles prevail with greater frequencies in downtown Mendoza associated to a greater vehicular activity. Coarse particles sediment near the emission point increasing toward the suburbs, and are related to soil particles. Morus alba resulted an adequate bioindicator of pollution in the urban environment.

Las plantas mejoran la calidad del aire al adsorber el material particulado (MP). Se evaluó la frecuencia del material particulado depositado en hojas de M. alba considerando la ubicación (microcentro, periurbano y suburbano) y época del año (primavera, verano y otoño) en la ciudad de Mendoza (Argentina). Se empleó el método gravimétrico para obtener el material sedimentado y, por lectura en microscopio óptico, la frecuencia de los tamaños: 2-5 µm, 6-10 µm, 11-18 µm y = 19 µm. En general dominan las partículas fias, con mayores frecuencias en el microcentro asociado a la mayor actividad vehicular. Las gruesas se depositan cerca de la fuente de emisión y se incrementan en el suburbano, asociadas a partículas de suelo. Morus alba resultó un adecuado bioindicador de contaminación en el ámbito urbano.

494 downloads

15.

Therapeutic dose of Ginkgo biloba extract 761 may alter the urine excretion of Wistar rats
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Dalmacio, Monica S. C.

; Campos, Sylvia M. N.

; Carvalho, Jorge J. J.

; Pereira, Mário J. S.

; Nascimento, Ana Lúcia

; Paschoal, Patricia O.

; Sobrinho, Andrea P.

; Pedruzzi, Monique M. B.

; Garrido, Valeria

; Moreno, Silvana R. F.

; Teixeira, Gerlinde A. P. B.

; Cardoso, Gilberto P.

Revista Brasileira de Farmacognosia

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oct 2012, Volume 22 N. 5 Pages 1060 - 1069

Abstract: En | Text: En | PDF: En

Wistar rats (n=20) were divided in two groups: G1 received 2 mg/kg of GBE (Ginkgo biloba extract 761), whereas G2 received the same volume of a sodium chloride solution (0.9%), both for 10 days. After a 7-day interval, the treatment was repeated for 8 days. Urine volume and food and water intake were measured daily during this protocol. Histological assessments were performed. No significant difference (p>0.05) was observed in food and water intake of animals during treatment with GBE. Animals who received GBE had a smaller urine volume and increase of weight with a significance difference (p<0.05) during the first and second exposure period. No histological alteration was observed in tissues, except for the kidney of the experimental group, which revealed a higher concentration of red cells in the glomerulus with a strong staining for Vascular Endothelial Growth Factor (VEGF). The introduction of GBE (therapeutic dose) in health rats may promote alterations in the physiology of the kidney, but no sufficient to modify the glomerulus architecture, including at ultra structural level (electron microscopy).

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sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

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