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Sarcoglycanopathies: a clinico-pathological study.

A K Meena1, D Sreenivas, C Sundaram

  • 1Department of Neurology, Nizam's Institute of Medical Sciences, Punjagutta, Hyderabad, India. meenaak@hotmail.com

Neurology India
|June 15, 2007
PubMed
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Sarcoglycanopathy is the most common type of limb girdle muscular dystrophy (LGMD), particularly the alpha type. Early onset, specific knee flexor weakness, and high creatine phosphokinase levels can help identify sarcoglycanopathy in LGMD patients.

Area of Science:

  • Neurology
  • Genetics
  • Biochemistry

Background:

  • Limb girdle muscular dystrophy (LGMD) is a group of inherited muscle disorders causing progressive weakness.
  • Clinical features often overlap, making differentiation between LGMD subtypes challenging.

Purpose of the Study:

  • To investigate the prevalence and characteristics of different LGMD subtypes.
  • To identify clinical and biochemical markers for distinguishing sarcoglycanopathies (SGP) within LGMD.

Main Methods:

  • Studied 26 patients with limb girdle weakness and muscle biopsy findings suggestive of dystrophy.
  • Utilized immunohistochemistry to classify sarcoglycanopathies (alpha, beta, gamma, delta).

Main Results:

  • Sarcoglycanopathy (SGP) was the most frequent LGMD subtype (53.8%), with alpha-SGP being the most common (26.9%).

Related Experiment Videos

  • Calf hypertrophy and hip abductor weakness were common findings. Selective weakness of knee flexors was more prevalent in SGP.
  • Elevated creatine phosphokinase (CK) levels (mean 2519 IU/L) were observed in 92.8% of patients. Cardiac involvement and ECG changes were noted in a significant portion.

    • Conclusions:

    • Sarcoglycanopathy, especially alpha-SGP, is a frequent LGMD subtype.
    • Early onset, specific knee flexor weakness, and very high CK levels may indicate SGP.
    • Immunohistochemistry is crucial for classifying LGMD subtypes before genetic analysis.