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|Title:||SKELETAL-MUSCLE INVOLVEMENT in TROPICAL SPASTIC PARAPARESIS HTLV-1-ASSOCIATED MYELOPATHY|
|Authors:||Gabbai, Alberto Alain [UNIFESP]|
Wiley, C. A.
Bordin, J. O.
Roman, G. C.
Universidade Federal de São Paulo (UNIFESP)
UNIV CALIF SAN DIEGO
PCR ELECTRON MICROSCOPY
|Citation:||Muscle & Nerve. New York: John Wiley & Sons Inc, v. 17, n. 8, p. 923-930, 1994.|
|Abstract:||The frequency of muscle involvement in TSP/HAM is not known, nor is the precise role that HTLV-1 and the diverse cytokines play in the genesis of HTLV-1-associated diseases. in order to better define the frequency and characteristics of the skeletal muscle involvement in TSP/ HAM, we studied 11 affected patients. EMG was performed in 9 patients and muscle biopsy was performed in all 11. Muscle tissue was analyzed using: reverse transcriptase PCR for interleukin-1 in 8; PCR for HTLV-1 proviral DNA in 5; and electron microscopy for viral particles in 3. We found pathologic alterations in all 11 patients. Four patients (36%) had a neurogenic process, while a primary muscle involvement was observed in the rest (64%). Four patients (36%) had polymyositis, and 3 (27%) had a noninflammatory myopathy. Muscle weakness in the upper limbs was significantly associated with inflammation in the muscle biopsy. EMG was abnormal in only 2 of 9 patients. Reverse transcriptase PCR did not demonstrate message for interleukin-1 in any sample examined. PCR did identify HTLV-1 proviral DNA in the muscle of 3 patients. Retroviral-like particles were found, by EM, in only one biopsy. HTLV-1 may play an important role in the pathogenesis of the frequent myopathies associated with HAM/TSP. (C) 1994 John Wiley & Sons, Inc.|
|Appears in Collections:||Em verificação - Geral|
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