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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282X

Arq. Neuro-Psiquiatr. vol.50 no.4 São Paulo Dec. 1992 

Carrier detection of duchenne and becker muscular dystrophy using muscle dystrophin immunohistochemistry


Detecção de portadoras de distrofia muscular de Duchenne e de Becker utilizando imuno-hitoquímica com distrofina



Acary S. Bulle OliveiraI; Alberto A. GabbaiI; Beny SchmidtII; Beatriz Hitomi KiyomotoI; J. G. Camargo LimaI; Carlo MinettiIII; Eduardo BonillaIII

IDepartement of Neurology, Neurosurgery and Experimental Neurology of Escola Pau-lista de Medicina (EPM), São Paulo
IIAdjunct Professor, Department of Pathology, EPM
IIIDepartment of Neurology, College of Physicians and Surgeons of Columbia University, New York




To ascertain whether dystrophin immunohistochemistry could improve DMD/ BMD carrier detection, we analyzed 14 muscle biopsies from 13 DMD and one BMD probable and possible carriers. All women were also evaluated using conventional methods, including genetic analysis, clinical and neurological evaluation, serum CK levels, KMG, and muscle biopsy. In 6 cases, there was a mosaic of dystrophin-positive and dystrophin-deficient fibers that allowed to make the diagnosis of a carrier state. Comparing dystrophin immunohistochemistry to the traditional methods, it was noted that this method is less sensitive than serum CK measuremens, but is more sensitive than EMG and muscle biopsy. The use of dystrophin immunohistochemistry in addition to CK, EMG and muscle biopsy improved the accuracy of carrier detection. This method is also helpful to distinguish manifesting DMD carriers from patients with other neuromuscular diseases like limb-girdle muscular dystrophy and spinal muscular atrophy.

Key words: muscular dystrophy (Duchenne and Becker), carrier detection, dystrophin.


Para determinar se imuno-histoquímica com distrofina poderia melhorar a detecção de portadoras de distrofia muscular de Duchenne (DMD) e de Becker (DMB), analisamos 14 biópsias musculares de 13 portadoras prováveis ou possíveis de DMD e de uma portadora provável de DMB. Todas as mulheres foram também avaliadas usando métodos convencionais, incluindo análise genética, avaliação clínica e neurológica, níveis séricos de CK, EMG e biópsia muscular com estudo histoquímico. Em 6 casos havia um mosaico de fibras musculares distrofina-positivas e distrofina-negativas, que permitia caracterizar um estado de portadora. Comparando imuno-histoquímica com distrofina e métodos tradicionais, notou-se que este método é menos sensível que medidas de CK, mas é mais sensível que EMG e biópsia muscular. O uso deste método associado a CK, EMG e biópsia muscular aumentou ta possibilidade de detecção de portadoras. Este método é também útil para distinguir portadoras manifestantes de DMD de pacientes com outras doenças neuromusculares como a distrofia cintura-membros e amiotrofia espinhal progressiva,

Palavras-chave: distrofia muscular (Duchenne e Becker), detecção de portadoras, distrofina.



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Supported partially by the Brazilian Research Council (CNPq).



Dr. Acary Souza Bulle Oliveira — Disciplina de Neurologia, Escola Paulista de Medicina -Rua Botucatu 762 - 04028 São Paulo SP - Brasil.

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