<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0021-7557</journal-id>
<journal-title><![CDATA[Jornal de Pediatria]]></journal-title>
<abbrev-journal-title><![CDATA[J. Pediatr. (Rio J.)]]></abbrev-journal-title>
<issn>0021-7557</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Brasileira de Pediatria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0021-75572006000500008</article-id>
<article-id pub-id-type="doi">10.1590/S0021-75572006000500008</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Avaliação prospectiva de 11 pacientes brasileiros com mucopolissacaridose II]]></article-title>
<article-title xml:lang="en"><![CDATA[Prospective study of 11 Brazilian patients with mucopolysaccharidosis II]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[Louise L. C.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Schwartz]]></surname>
<given-names><![CDATA[Ida V. D.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Puga]]></surname>
<given-names><![CDATA[Ana C. S.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vieira]]></surname>
<given-names><![CDATA[Taiane A.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Munoz]]></surname>
<given-names><![CDATA[Maria Verônica R.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Giugliani]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidade Federal do Rio Grande do Sul Departamento de Genética Programa de Pós-Graduação em Genética e Biologia Molecular]]></institution>
<addr-line><![CDATA[Porto Alegre RS]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Hospital de Clínicas de Porto Alegre Serviço de Genética Médica ]]></institution>
<addr-line><![CDATA[Porto Alegre RS]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2006</year>
</pub-date>
<volume>82</volume>
<numero>4</numero>
<fpage>273</fpage>
<lpage>278</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0021-75572006000500008&amp;lng=en&amp;nrm=iso&amp;tlng=en"></self-uri><self-uri xlink:href="http://www.scielo.br/scielo.php?script=sci_abstract&amp;pid=S0021-75572006000500008&amp;lng=en&amp;nrm=iso&amp;tlng=en"></self-uri><self-uri xlink:href="http://www.scielo.br/scielo.php?script=sci_pdf&amp;pid=S0021-75572006000500008&amp;lng=en&amp;nrm=iso&amp;tlng=en"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[OBJETIVO: Avaliar a progressão da mucopolissacaridose II, durante um período de 12 meses, em 11 pacientes brasileiros. MÉTODOS: Onze pacientes brasileiros com mucopolissacaridose II foram avaliados prospectivamente no Serviço de Genética Médica do Hospital de Clínicas de Porto Alegre. As avaliações realizadas na visita inicial e na de 12 meses foram: anamnese, exame físico, ressonância nuclear magnética abdominal, ecocardiograma, teste da caminhada em 6 minutos, audiometria, exames bioquímicos séricos e dosagem uriná- ria de glicosaminoglicanos. RESULTADOS: Os principais achados relativos à comparação entre as duas visitas foram: 1) dois pacientes apresentaram retardo de crescimento; 2) dois pacientes apresentaram variação negativa em relação ao peso; 3) um paciente apresentou variação de obesidade para sobrepeso; 4) três pacientes desenvolveram alargamento do ventrículo esquerdo; destes, dois aumentaram o número de lesões nas valvas cardíacas; 5) não foi encontrada diferença estatística significativa entre a média das distâncias percorridas no teste da caminhada em 6 minutos; 6) houve aumento do volume esplênico; 7) ocorreu aumento dos níveis de gamaglutamiltransferase; 8) não houve alteração dos níveis urinários de glicosaminoglicanos. CONCLUSÕES: De uma maneira geral, a única variável que apresentou, no período estudado, piora com potencial repercussão clínica imediata foram os achados ecocardiográficos. Embora o período de 12 meses seja curto para medir alterações na maioria dos parâmetros comprometidos na mucopolissacaridose II, sua natureza progressiva deve ser levada em conta na avaliação da eficácia dos protocolos de tratamento para essa condição.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[OBJECTIVE: To assess the progression of mucopolysaccharidosis II in 11 Brazilian patients over a 12-month period. METHODS: Eleven Brazilian patients with mucopolysaccharidosis II were prospectively studied at the Division of Medical Genetics of Hospital de Clínicas de Porto Alegre. The initial assessment and the assessment at 12 months included: anamnesis, physical examination, abdominal nuclear magnetic resonance, echocardiogram, 6-minute walk test, audiometry, serum biochemical tests and urinary glycosaminoglycan concentration. RESULTS: The major findings after comparing the assessments were: 1) two patients had growth retardation; 2) two patients showed negative weight change; 3) one patient went from obese to overweight; 4) three patients revealed left ventricle hypertrophy; of these, two increased the number of cardiac valve lesions; 5) there was no statistically significant difference between the mean distances obtained on the 6-minute walk test; 6) there was splenic enlargement; 7) there was an increase in gamma-glutamyltransferase levels; 8) the urinary concentration of glycosaminoglycans remained unchanged. CONCLUSIONS: In general, echocardiographic findings were the only variable with deterioration and possible immediate clinical consequences. Although a 12-month period is too short to detect changes in most variables related to mucopolysaccharidosis II, its progressive nature should be taken into account when evaluating the efficiency of treatment protocols.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Glicosaminoglicanos]]></kwd>
<kwd lng="pt"><![CDATA[mucopolissacaridose II]]></kwd>
<kwd lng="pt"><![CDATA[síndrome de Hunter]]></kwd>
<kwd lng="pt"><![CDATA[iduronato sulfatase]]></kwd>
<kwd lng="en"><![CDATA[Glycosaminoglycans]]></kwd>
<kwd lng="en"><![CDATA[mucopolysaccharidosis II]]></kwd>
<kwd lng="en"><![CDATA[Hunter syndrome]]></kwd>
<kwd lng="en"><![CDATA[idorunate sulfatase]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font face="Verdana" size="2"><b>ARTIGO ORIGINAL</b></font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="4"><a name="topo"></a><b>Avalia&ccedil;&atilde;o    prospectiva de 11 pacientes brasileiros com mucopolissacaridose II</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b>Louise L. C. Pinto<sup>I</sup>; Ida V. D.    Schwartz<sup>I</sup>; Ana C. S. Puga<sup>II</sup>; Taiane A. Vieira<sup>II</sup>;    Maria Verônica R. Munoz<sup>II</sup>; Roberto Giugliani<sup>II</sup>; Grupo    de Estudos sobre MPS II<sup>III</sup></b></font></p>     <p><font size="2" face="Verdana"><sup>I</sup>Servi&ccedil;o de Gen&eacute;tica    M&eacute;dica, Hospital de Cl&iacute;nicas de Porto Alegre (HCPA), Porto Alegre,    RS. Programa de P&oacute;s-Gradua&ccedil;&atilde;o em Gen&eacute;tica e Biologia    Molecular, Departamento de Gen&eacute;tica, Universidade Federal do Rio Grande    do Sul (UFRGS), Porto Alegre, RS    <br>   <sup>II</sup>Servi&ccedil;o de Gen&eacute;tica M&eacute;dica, Hospital de Cl&iacute;nicas    de Porto Alegre (HCPA), Porto Alegre, RS    <br>   <sup>III</sup>Grupo de Estudos sobre MPS II: Silvia Brustolin, Adriana Pires,    Maria &Acirc;ngela Moreira, Patr&iacute;cia Barrios, Sim&atilde;o Piltcher,    Let&iacute;cia Schmidt, Luciana Cigana, Leonardo Vedolin, Raquel Boy, Emerson    Santos, Marcia Ribeiro, Denise Norato, Ruy Oliveira Sobrinho, Angelina Acosta,    Julie Lieb, Anne Conway; Servi&ccedil;os de Pneumologia, Cardiologia e Otorrinolaringologia    do Hospital de Cl&iacute;nicas de Porto Alegre (HCPA), Porto Alegre, RS; Servi&ccedil;o    de Radiologia, Hospital M&atilde;e de Deus Center, Porto Alegre, RS; Departamento    de Pediatria, Universidade Estadual do Rio Janeiro (UFRJ), Rio de Janeiro, RJ;    Departamento de Pediatria, Funda&ccedil;&atilde;o Universidade de Ci&ecirc;ncias    da Sa&uacute;de de Alagoas, Macei&oacute;, AL; Instituto de Puericultura e Pediatria    Martag&atilde;o Gesteira, UFRJ, Rio de Janeiro, RJ; Departamento de Gen&eacute;tica    M&eacute;dica, Universidade Estadual de Campinas (UNICAMP), Campinas, SP; Departamento    de Gen&eacute;tica, Universidade Federal da Bahia (UFBA), Salvador, BA; Transkaryotic    Therapies Inc., Cambridge, USA</font></p>     <p><font face="Verdana" size="2"><a href="#end">Correspond&ecirc;ncia</a></font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p>&nbsp;</p> <hr size="1" noshade>     <p> <font face="Verdana" size="2"><b>RESUMO</b></font></p>     <p><font size="2" face="Verdana"><b>OBJETIVO:</B> Avaliar a progress&atilde;o    da mucopolissacaridose II, durante um per&iacute;odo de 12 meses, em 11 pacientes    brasileiros.    <br>   <B>M&Eacute;TODOS:</B> Onze pacientes brasileiros com mucopolissacaridose II    foram avaliados prospectivamente no Servi&ccedil;o de Gen&eacute;tica M&eacute;dica    do Hospital de Cl&iacute;nicas de Porto Alegre. As avalia&ccedil;&otilde;es    realizadas na visita inicial e na de 12 meses foram: anamnese, exame f&iacute;sico,    resson&acirc;ncia nuclear magn&eacute;tica abdominal, ecocardiograma, teste    da caminhada em 6 minutos, audiometria, exames bioqu&iacute;micos s&eacute;ricos    e dosagem urin&aacute;-    <br>   ria de glicosaminoglicanos.    <br>   <b>RESULTADOS: </b>Os principais achados relativos &agrave; compara&ccedil;&atilde;o    entre as duas visitas foram: 1) dois pacientes apresentaram retardo de crescimento;    2) dois pacientes apresentaram varia&ccedil;&atilde;o negativa em rela&ccedil;&atilde;o    ao peso; 3) um paciente apresentou varia&ccedil;&atilde;o de obesidade para    sobrepeso; 4) tr&ecirc;s pacientes desenvolveram alargamento do ventr&iacute;culo    esquerdo; destes, dois aumentaram o n&uacute;mero de les&otilde;es nas valvas    card&iacute;acas; 5) n&atilde;o foi encontrada diferen&ccedil;a estat&iacute;stica    significativa entre a m&eacute;dia das dist&acirc;ncias percorridas no teste    da caminhada em 6 minutos; 6) houve aumento do volume espl&ecirc;nico; 7) ocorreu    aumento dos n&iacute;veis de gamaglutamiltransferase; 8) n&atilde;o houve altera&ccedil;&atilde;o    dos n&iacute;veis urin&aacute;rios de glicosaminoglicanos.    <br>   <B>CONCLUS&Otilde;ES:</B> De uma maneira geral, a &uacute;nica vari&aacute;vel    que apresentou, no per&iacute;odo estudado, piora com potencial repercuss&atilde;o    cl&iacute;nica imediata foram os achados ecocardiogr&aacute;ficos. Embora o    per&iacute;odo de 12 meses seja curto para medir altera&ccedil;&otilde;es na    maioria dos par&acirc;metros comprometidos na mucopolissacaridose II, sua natureza    progressiva deve ser levada em conta na avalia&ccedil;&atilde;o da efic&aacute;cia    dos protocolos de tratamento para essa condi&ccedil;&atilde;o.</font></p>     <p><font size="2" face="Verdana"><B>Palavras-chave:</b> Glicosaminoglicanos, mucopolissacaridose    II, s&iacute;ndrome de Hunter, iduronato sulfatase.</font></p> <hr noshade size="1">     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font size="3" face="Verdana"><b>Introdu&ccedil;&atilde;o</b></font></p>     <p><font size="2" face="Verdana">As mucopolissacaridoses (MPS) s&atilde;o um grupo    de doen&ccedil;as gen&eacute;ticas causadas pela defici&ecirc;ncia de uma das    enzimas lisoss&ocirc;micas respons&aacute;veis por uma etapa espec&iacute;fica    na degrada&ccedil;&atilde;o dos glicosaminoglicanos (GAG). A mucopolissacaridose    II (MPS II ou s&iacute;ndrome de Hunter) apresenta heran&ccedil;a ligada ao    X, sendo causada pela atividade deficiente da enzima iduronato sulfatase (IDS),    com conseq&uuml;ente aumento da concentra&ccedil;&atilde;o urin&aacute;ria dos    GAG dermatan sulfato e heparan sulfato<sup>1</sup>. A incid&ecirc;ncia da MPS    II &eacute; estimada, com base em estudos internacionais, em 1:68.000-1:320.000    rec&eacute;m-nascidos vivos<sup>2,3</sup>. Embora n&atilde;o sejam conhecidos    dados exatos sobre a incid&ecirc;ncia das MPS no Brasil, a MPS II parece ser    um dos tipos mais freq&uuml;entemente diagnosticados em nosso pa&iacute;s: no    Laborat&oacute;rio de Erros Inatos do Metabolismo do Servi&ccedil;o de Gen&eacute;tica    M&eacute;dica do Hospital de Cl&iacute;nicas de Porto Alegre, laborat&oacute;rio    de refer&ecirc;ncia para o diagn&oacute;stico das MPS no Brasil, 104 pacientes    brasileiros com MPS foram diagnosticados entre abril de 2004 e setembro de 2005,    sendo 33 MPS I, 25 MPS II, 14 MPS III, 12 MPS IV, 18 MPS VI e 2 MPS VII<sup>4</sup>.</font></p>     <p><font size="2" face="Verdana">A maioria da literatura dispon&iacute;vel sobre    a MPS II est&aacute; disposta sob a forma de relatos de caso e/ou s&eacute;ries    de caso que incluem pacientes com outras MPS<sup>5-8</sup>. Estudos sobre a    hist&oacute;ria natural das MPS II s&atilde;o raros e, quando existentes, retrospectivos<sup>9</sup>;    os pacientes costumam ser normais ao nascimento, e um curso progressivo &eacute;    a regra, embora as etapas dessa progress&atilde;o n&atilde;o estejam bem delineadas    na literatura<sup>1,10</sup>. As manifesta&ccedil;&otilde;es cl&iacute;nicas    mais freq&uuml;entemente encontradas s&atilde;o face grosseira, altera&ccedil;&otilde;es    esquel&eacute;ticas, baixa estatura, contraturas articulares, atraso do desenvolvimento    neuropsicomotor, infec&ccedil;&otilde;es recorrentes de vias a&eacute;reas superiores    e inferiores, surdez e cardiopatia. Opacifica&ccedil;&atilde;o de c&oacute;rnea    e giba t&oacute;raco-lombar n&atilde;o s&atilde;o freq&uuml;entes. Les&otilde;es    papulares no dorso, bra&ccedil;os e n&aacute;degas s&atilde;o t&iacute;picas    da MPS II, ocorrendo muito raramente em outras MPS<sup>11,12</sup>. As manifesta&ccedil;&otilde;es    esquel&eacute;ticas s&atilde;o conjuntamente chamadas de disostose m&uacute;ltipla    e incluem macrocefalia, sela t&uacute;rsica em J, redu&ccedil;&atilde;o do di&acirc;metro    &acirc;ntero-posterior das v&eacute;rtebras, coxa valga, irregularidade da di&aacute;fise    dos ossos longos e displasia da ep&iacute;fise dos ossos tubulares curtos. A    MPS II est&aacute; associada a uma grande heterogeneidade cl&iacute;nica e costuma    ser classificada de acordo com a presen&ccedil;a de atraso de desenvolvimento    e/ou retardo mental, em formas neuronop&aacute;tica ou n&atilde;o-neuronop&aacute;tica<sup>10</sup>.</font></p>     <p><font size="2" face="Verdana">O presente estudo teve como objetivo a avalia&ccedil;&atilde;o    da progress&atilde;o da MPS II em 11 pacientes brasileiros no per&iacute;odo    de 1 ano, e, conseq&uuml;entemente, uma melhor caracteriza&ccedil;&atilde;o    da hist&oacute;ria natural desse tipo de MPS e da sua progress&atilde;o.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="3"><b>Material e m&eacute;todos</b></font></p>     <p><font size="2" face="Verdana">Este estudo foi aprovado pelo comit&ecirc; de    &eacute;tica do Hospital de Cl&iacute;nicas de Porto Alegre e seguiu, durante    todo o per&iacute;odo de sua realiza&ccedil;&atilde;o, as normas de boas pr&aacute;ticas    em pesquisa cl&iacute;nica. Todos os pacientes e/ou respons&aacute;veis assinaram    um termo de consentimento livre e esclarecido antes do in&iacute;cio do estudo.    De acordo com os crit&eacute;rios de inclus&atilde;o, os pacientes deveriam    ser do sexo masculino, apresentar atividade deficiente da IDS em plasma e/ou    leuc&oacute;citos e atividade normal de outra sulfatase e n&atilde;o haver sido    submetido a tratamento espec&iacute;fico para a MPS II (transplante de medula    &oacute;ssea ou terapia de reposi&ccedil;&atilde;o enzim&aacute;tica). Os potenciais    participantes foram identificados a partir do ambulat&oacute;rio de MPS do Servi&ccedil;o    de Gen&eacute;tica M&eacute;dica do HCPA (SGM-HCPA), um centro de refer&ecirc;ncia    nacional para o diagn&oacute;stico e tratamento desse grupo de doen&ccedil;as.    Desde 1998, tal ambulat&oacute;rio prestou atendimento a aproximadamente 100    pacientes com MPS, provenientes de v&aacute;rios estados brasileiros. O estudo    foi desenhado para a inclus&atilde;o de 20 pacientes, sendo que aproximadamente    metade da amostra deveria apresentar a forma neuronop&aacute;tica da MPS II.    As avalia&ccedil;&otilde;es foram realizadas atrav&eacute;s de duas visitas    ao centro do estudo (SGM-HCPA); a primeira, no momento 0 (visita 1), e a segunda,    12 meses ap&oacute;s (visita 2), incluindo: anamnese, exame f&iacute;sico, resson&acirc;ncia    magn&eacute;tica de abdome para medida de volume hep&aacute;tico e espl&ecirc;nico,    ecocardiograma, teste da caminhada dos 6 minutos (TC6M), audiometria, testes    bioqu&iacute;micos s&eacute;ricos e quantifica&ccedil;&atilde;o da excre&ccedil;&atilde;o    urin&aacute;ria de GAG. Na tentativa de diminuir potenciais vieses em rela&ccedil;&atilde;o    &agrave;s avalia&ccedil;&otilde;es, os examinadores de cada &aacute;rea foram    sempre os mesmos. Na visita 1, os pacientes tamb&eacute;m foram submetidos a    testagem psicol&oacute;gica para avalia&ccedil;&atilde;o do desenvolvimento    e do quociente de intelig&ecirc;ncia, a fim de serem classificados como portadores    da forma neurop&aacute;tica ou n&atilde;o-neuronop&aacute;tica da MPS II.</font></p>     <p><font size="2" face="Verdana">A anamnese foi realizada com pacientes e respons&aacute;veis,    sendo que as seguintes vari&aacute;veis foram tabuladas: data de nascimento,    naturalidade, idade na avalia&ccedil;&atilde;o, medica&ccedil;&otilde;es em    uso cont&iacute;nuo, capacidade de deambula&ccedil;&atilde;o, presen&ccedil;a    de cegueira, uso de press&atilde;o positiva cont&iacute;nua em vias a&eacute;reas    e hist&oacute;ria de traqueostomia. Em rela&ccedil;&atilde;o ao exame f&iacute;sico,    foram analisadas as medidas antropom&eacute;tricas (peso, altura, per&iacute;metro    cef&aacute;lico) e a presen&ccedil;a das les&otilde;es papulares t&iacute;picas    da MPS II. Para avalia&ccedil;&atilde;o do volume hep&aacute;tico e espl&ecirc;nico,    foram utilizadas as medidas obtidas por meio da resson&acirc;ncia magn&eacute;tica    de abdome superior. As medidas dos volumes hep&aacute;tico e espl&ecirc;nico    foram comparadas com a normalidade utilizando os crit&eacute;rios de Weinreb    et al.<sup>13</sup>.</font></p>     <p><font size="2" face="Verdana">O TC6M foi realizado em 2 dias alternados em    ambas as visitas (quatro testes no total) e de acordo com as regras da American    Thoracic Society<sup>14</sup>. Os percentis para o per&iacute;metro cef&aacute;lico    foram calculados utilizando a curva padr&atilde;o de Nelhaus<sup>15</sup>. Para    as medidas antropom&eacute;tricas, os indicadores foram expressos em escore    z<sup>16,17</sup>, e a curva National Center of Health Statistics (NCHS)<sup>18</sup>    foi utilizada como refer&ecirc;ncia. Os indicadores estatura/idade (E/I), peso/idade    (P/I) e peso/estatura (P/E) foram subdivididos nos seguintes par&acirc;metros:    &lt; -2 escore z (d&eacute;ficit estatural), -2 a -1 escore z (risco nutricional),    -1 a +1 escore z, +1 a + 2 escore z e &gt; + 2 escore z. Utilizou se o programa    Epi-Info, vers&atilde;o 6.0 para a an&aacute;lise dos dados relativos a essa    vari&aacute;vel.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana">De acordo com o protocolo do estudo, a avalia&ccedil;&atilde;o    do desenvolvimento foi realizada nos pacientes de 3 a 10 anos, e a testagem    do quociente de intelig&ecirc;ncia, nos pacientes acima de 11 anos. A avalia&ccedil;&atilde;o    do desenvolvimento incluiu os testes <i>Bayley Scales of Infant Development    - Second Edition</i> (BSID-II) (crian&ccedil;as at&eacute; 42 meses)<sup>19</sup>    e o <i>Weschsler Preschool and Primary Scale of Intelligence - Revised </i>(WIPPSI-R    )<sup>20</sup> (crian&ccedil;as entre 43 meses e 10 anos). Para a avalia&ccedil;&atilde;o    da intelig&ecirc;ncia, foi utilizado o Leiter-R<sup>21</sup>. Pacientes que    apresentavam resultados alterados na avalia&ccedil;&atilde;o de desenvolvimento    e/ou na testagem de QI foram classificados como portadores da forma neuronop&aacute;tica    da MPS II.</font></p>     <p><font size="2" face="Verdana">A an&aacute;lise estat&iacute;stica foi realizada    por meio dos programas SPSS 11.0 e NCSS 5.0. As vari&aacute;veis cont&iacute;nuas    foram comparadas, entre as duas visitas, por meio de teste<i> t </i>para amostras    n&atilde;o-param&eacute;tricas (teste de Wilcoxon). O n&iacute;vel de signific&acirc;ncia    considerado foi p = 0,05. Os testes realizados utilizaram o programa SPSS 11.0    e NCSS 5.0.</font></p>     <p><font size="2" face="Verdana">Foram consideradas para a elabora&ccedil;&atilde;o    deste artigo somente as vari&aacute;veis obtidas em, pelo menos, 50% dos pacientes.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="3"><b>Resultados</b> </font></p>     <p><font size="2" face="Verdana">Vinte pacientes foram inclu&iacute;dos no estudo.    Entretanto, seis deles (todos com a forma n&atilde;o-neuronop&aacute;tica),    foram posteriormente exclu&iacute;dos, pois iniciaram tratamento com terapia    de reposi&ccedil;&atilde;o enzim&aacute;tica, e tr&ecirc;s n&atilde;o puderam    retornar para a visita 2 (um &oacute;bito e dois pacientes com piora cl&iacute;nica    importante). Os tr&ecirc;s pacientes que n&atilde;o puderam retornar na segunda    visita tinham a forma neuronop&aacute;tica. Assim sendo, a avalia&ccedil;&atilde;o    relativa &agrave; visita 2 s&oacute; foi realizada em 11 pacientes, e apenas    os dados desse grupo foram utilizados no presente trabalho. Esses pacientes    foram provenientes das Regi&otilde;es Sudeste (36,4%), Nordeste (36,4%) e Sul    (27,2%) do Brasil. Em 10/11 pacientes, algum grau de comprometimento neurol&oacute;gico    foi observado, caracterizando a forma neuronop&aacute;tica da MPS II e explicando    a falta de ader&ecirc;ncia a algumas das avalia&ccedil;&otilde;es previstas    pelo protocolo. Os resultados est&atilde;o resumidos nas <a href="#tab1">Tabelas    1</a>, <a href="/img/revistas/jped/v82n4/a08tab02.gif">2</a> e <a href="/img/revistas/jped/v82n4/a08tab03.gif">3</a>.</font></p>     <p><a name="tab1"></a></p>     <p>&nbsp;</p>     <p align="center"><img src="/img/revistas/jped/v82n4/a08tab01.gif"></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana">A amostra estudada foi composta basicamente por    crian&ccedil;as. Na visita 1, a m&eacute;dia de idade foi de 7,3 anos (DP &plusmn;    3,6) e, na visita 2, foi de 8,4 anos (DP &plusmn; 3,6). Somente um apresentava    a forma n&atilde;o-neuronop&aacute;tica (11,2 anos) da MPS II, tendo realizado    a testagem de QI.</font></p>     <p><font size="2" face="Verdana">Dados obtidos na anamnese na visita 1: 10/11    tinham deambula&ccedil;&atilde;o aut&ocirc;noma preservada, nenhum apresentava    cegueira, 1/11 fazia uso de CPAP, 1/11 utilizava medicamentos cardiol&oacute;gicos;    na visita 2: 9/11 mantinham deambula&ccedil;&atilde;o aut&ocirc;noma preservada,    nenhum paciente relatava cegueira, 1/11 fazia o uso CPAP, 2/11 utilizavam medicamentos    para as manifesta&ccedil;&otilde;es card&iacute;acas da doen&ccedil;a. Em rela&ccedil;&atilde;o    aos dados do exame f&iacute;sico, a m&eacute;dia do per&iacute;metro cef&aacute;lico    na visita 1 foi de 55,5 cm (DP &plusmn; 1,97) e, na visita 2, foi de 56,1 cm    (DP &plusmn; 1,44). Na visita 1, ao exame f&iacute;sico, 3/11 pacientes apresentavam    as les&otilde;es papulares e, na visita 2, em 4/11 pacientes foram identificadas    essas les&otilde;es.</font></p>     <p><font size="2" face="Verdana">Nos 11 pacientes avaliados, um pior desempenho    foi observado nos seguintes exames e avalia&ccedil;&otilde;es: na rela&ccedil;&atilde;o    E/I (4/7); na rela&ccedil;&atilde;o P/I (4/7); piora cardiol&oacute;gica ecogr&aacute;fica    (3/11); aumento do volume espl&ecirc;nico na resson&acirc;ncia abdominal (3/11)    e aumento dos n&iacute;veis s&eacute;ricos de gamaglutamiltransferase (gama-GT)    (4/11) (<a href="#tab1">Tabela 1</a>).</font></p>     <p><font size="2" face="Verdana">Por outro lado, os outros par&acirc;metros avaliados    nesse per&iacute;odo e que se mantiveram est&aacute;veis foram: a m&eacute;dia    dos n&iacute;veis de GAG urin&aacute;rios, a m&eacute;dia das dist&acirc;ncias    percorridas nos TC6M, a medida do volume hep&aacute;tico e os demais testes    bioqu&iacute;micos s&eacute;ricos coletados (<a href="/img/revistas/jped/v82n4/a08tab02.gif">Tabela    2</a>).</font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="3"><b>Discuss&atilde;o</b></font></p>     <p><font size="2" face="Verdana">Este &eacute; o primeiro estudo prospectivo realizado    em pacientes com MPS II. Embora os dados apresentados sejam relativos aos 11    pacientes avaliados que compareceram &agrave;s visitas 1 e 2, frisamos que,    no intervalo de 12 meses, ocorreu piora cl&iacute;nica importante de outros    tr&ecirc;s pacientes com a forma neuronop&aacute;tica previamente inclu&iacute;dos    no estudo (incluindo um &oacute;bito), fato que enfatiza o curso progressivo    dessa doen&ccedil;a.</font></p>     <p><font size="2" face="Verdana">A amostra estudada foi composta basicamente por    crian&ccedil;as que apresentavam a forma neuronop&aacute;tica da MPS II. Isso    pode ter ocorrido por duas raz&otilde;es: 1) a forma neuronop&aacute;tica &eacute;    a mais freq&uuml;ente na MPS II<sup>8</sup>; 2) devido ao recrutamento da amostra    ter sido realizado em um centro de refer&ecirc;ncia, &eacute; poss&iacute;vel    que pacientes mais graves tenham tido um interesse maior em participar do estudo    por j&aacute; estarem em acompanhamento no ambulat&oacute;rio. &Eacute; importante    ressaltar que dois subtipos neuronop&aacute;ticos e n&atilde;o-neuronop&aacute;ticos    n&atilde;o podem ser diferenciados pelos resultados da investiga&ccedil;&atilde;o    bioqu&iacute;mica<sup>22</sup>, sendo que o crit&eacute;rio fundamental para    a divis&atilde;o dos pacientes nesses subgrupos &eacute; o decl&iacute;nio intelectual<sup>11</sup>.    Acrescentamos, tamb&eacute;m, que os testes realizados nesse pacientes n&atilde;o    s&atilde;o espec&iacute;ficos para a avalia&ccedil;&atilde;o de pacientes com    a s&iacute;ndrome de Hunter. O fato de termos mantido o paciente com a forma    n&atilde;o-neuronop&aacute;tica na amostra &eacute; porque o comprometimento    neurol&oacute;gico por si s&oacute; n&atilde;o prediz o comprometimento pior    em outras a&eacute;reas.</font></p>     <p><font size="2" face="Verdana">Dos 11 pacientes, somente sete puderam ser avaliados    em rela&ccedil;&atilde;o ao escore z, por dois motivos: 1) em dois pacientes,    n&atilde;o foi poss&iacute;vel medir a estatura em raz&atilde;o de importantes    contraturas articulares; 2) os outros dois pacientes tinham 11 e 14 anos, n&atilde;o    podendo ser avaliados por esses crit&eacute;rios. A interpreta&ccedil;&atilde;o    desses resultados exige cautela, tendo em vista que esses pacientes em um dado    momento de seu crescimento linear acabam tendo baixa estatura ao serem comparados    com as curvas normais para a idade. Em que momento ocorre parada do crescimento    nesses pacientes n&atilde;o est&aacute; definido, sendo necess&aacute;rios outros    estudos por um per&iacute;odo mais longo e com um n&uacute;mero maior de aferi&ccedil;&otilde;es.    Em rela&ccedil;&atilde;o ao peso desses pacientes, visto que eles t&ecirc;m    baixa estatura, a rela&ccedil;&atilde;o dessa vari&aacute;vel com outro par&acirc;metro    (por exemplo, estatura e idade) deve ser interpretada com o mesmo cuidado. Para    algumas s&iacute;ndromes, j&aacute; existem curvas espec&iacute;ficas de acompanhamento,    o que torna mais preciso o acompanhamento dos dados antropom&eacute;tricos.    Ainda que a avalia&ccedil;&atilde;o nutricional n&atilde;o tenha sido feita    no nosso trabalho, as informa&ccedil;&otilde;es obtidas nos levam a sugerir    que essas crian&ccedil;as sejam acompanhadas tamb&eacute;m do ponto de vista    nutricional.</font></p>     <p><font size="2" face="Verdana">De uma maneira geral, a &uacute;nica vari&aacute;vel    que apresentou, no per&iacute;odo estudado, piora com potencial repercuss&atilde;o    cl&iacute;nica imediata foram os achados ecocardiogr&aacute;ficos. Outras vari&aacute;veis    que apresentaram progress&atilde;o (aqui definida como a piora de les&otilde;es    preexistentes ou o surgimento de novas) foram a altura, as les&otilde;es cut&acirc;neas    papulares, o volume espl&ecirc;nico e os n&iacute;veis de gama-GT (<a href="#tab1">Tabelas    1</a>, <a href="/img/revistas/jped/v82n4/a08tab02.gif">2</a> e <a href="/img/revistas/jped/v82n4/a08tab03.gif">3</a>).    Apesar do curso progressivo da doen&ccedil;a, o per&iacute;odo de 1 ano n&atilde;o    parece ter sido suficiente para detectar altera&ccedil;&otilde;es nos demais    par&acirc;metros avaliados.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana">Testes como o TC6M e a determina&ccedil;&atilde;o    dos n&iacute;veis urin&aacute;rios de GAG t&ecirc;m sido utilizados como desfechos    de estudos de avalia&ccedil;&atilde;o da efic&aacute;cia de terapia de reposi&ccedil;&atilde;o    enzim&aacute;tica para MPS I e MPS VI<sup>23,24</sup> - o aumento da dist&acirc;ncia    percorrida e uma diminui&ccedil;&atilde;o dos n&iacute;veis de GAG seriam indicativos    de uma melhora do paciente, em decorr&ecirc;ncia do tratamento. Na aus&ecirc;ncia    de tratamento espec&iacute;fico, poder&iacute;amos esperar tanto uma melhora    do TC6M (por uma melhor execu&ccedil;&atilde;o do teste devido ao melhor entendimento    do paciente associado ao aumento da idade) quanto uma estabiliza&ccedil;&atilde;o    ou piora. O TC6M faz parte da avalia&ccedil;&atilde;o da condi&ccedil;&atilde;o    cardiopulmonar e articular desses pacientes, sendo um teste funcional<sup>14,25</sup>.    N&atilde;o foi encontrada, no nosso estudo, diferen&ccedil;a estatisticamente    significativa (teste<i> t </i>para amostras n&atilde;o-param&eacute;tricas)    entre as m&eacute;dias das dist&acirc;ncias percorridas nas duas visitas (<a href="/img/revistas/jped/v82n4/a08tab02.gif">Tabela    2</a>), sugerindo que a piora ecocardiogr&aacute;fica ainda n&atilde;o tenha    se refletido em piora funcional no per&iacute;odo estudado. Na nossa amostra,    54% (6/11) conseguiram realizar o TC6M, sendo que a maioria dos pacientes n&atilde;o    colaborou para a realiza&ccedil;&atilde;o desse exame devido ao d&eacute;ficit    cognitivo, tendo sido considerados somente os pacientes que realizaram esse    exame de forma completa nos 2 dias alternados. Como pode ser visto na <a href="/img/revistas/jped/v82n4/a08tab02.gif">Tabela    2</a>, a dist&acirc;ncia percorrida tende a ser menor no primeiro teste realizado    (teste 1 da visita 1), sugerindo um efeito de aprendizado do paciente.</font></p>     <p><font size="2" face="Verdana">J&aacute; em rela&ccedil;&atilde;o aos GAG urin&aacute;rios,    observamos que houve um aparente aumento da sua excre&ccedil;&atilde;o, mas    acreditamos que esse achado tenha sido influenciado pelos resultados de um &uacute;nico    paciente, o qual apresentou um aumento significativo dessa vari&aacute;vel na    segunda visita.</font></p>     <p><font size="2" face="Verdana">Como conclus&atilde;o, nossos achados sugerem    que avalia&ccedil;&otilde;es cardiol&oacute;gicas peri&oacute;dicas com ecocardiograma    devem ser realizadas pelo menos anualmente em pacientes com MPS II e que outros    estudos de seguimento s&atilde;o necess&aacute;rios para o estabelecimento de    diretrizes para o acompanhamento desses pacientes. O car&aacute;ter progressivo    da MPS II, confirmado neste trabalho, deve ser levado em considera&ccedil;&atilde;o    na avalia&ccedil;&atilde;o da efic&aacute;cia de protocolos de tratamento para    essa condi&ccedil;&atilde;o.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana"><b>Agradecimentos</b></font></p>     <p><font size="2" face="Verdana">Este estudo foi parte de um protocolo internacional    colaborativo coordenado e com suporte da Transkaryotic Therapies (TKT). Agradecemos    &agrave; CAPES pela bolsa de mestrado da m&eacute;dica Louise Lapagesse de Camargo    Pinto.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana"><b>Refer&ecirc;ncias</b> </font></p>     <!-- ref --><p><font size="2" face="Verdana">1. Neufeld EF, Muenzer J. The mucopolysaccharidosis.    In: Scriver CR, Beandet AL, Sly S, Valle D, Childs B, Kinzler KW, Volgesltein    B, editors. The metabolic and molecular basis of inherited disease. 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<body><![CDATA[<br>   Tel.: (51) 2101.8011    <br>   Fax: (51) 2101.8010    <br>   E-mail: <a href="mailto:loulapagesse@ibest.com.br">loulapagesse@ibest.com.br</a></font></p>     <p><font face="Verdana" size="2">Artigo submetido em 08.11.05, aceito em 17.03.06.</font></p>      ]]></body><back>
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