PMID- 12210368 OWN - NLM STAT- MEDLINE DCOM- 20020926 LR - 20171116 IS - 0148-639X (Print) IS - 0148-639X (Linking) VI - 26 IP - 3 DP - 2002 Sep TI - Apoptosis and apoptosis-related proteins in thyroid myopathies. PG - 383-8 AB - DNA fragmentation and apoptosis-related proteins have been investigated in thyroid cells and there is evidence that Fas-mediated apoptosis is inhibited by thyroid stimulating hormone (TSH). We investigated DNA fragmentation by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL), and Bcl-2 and Fas antigen expression by immunocytochemistry in skeletal muscles from 12 patients with hypothyroid myopathy and 5 patients with hyperthyroid myopathy. The finding of very few TUNEL-positive muscle fibers in both conditions suggests that apoptosis does not play a role in the pathogenesis of thyroid myopathies. Bcl-2 expression increased significantly in hypothyroid myopathy, correlating with high serum TSH levels, and not with either triiodothyronine (T3) or thyroxine (T4) serum levels. By contrast, Fas antigen was overexpressed in hyperthyroid myopathy, correlating with low TSH levels. These findings suggest an anti-apoptotic role for TSH itself in skeletal muscle. CI - Copyright 2002 Wiley Periodicals, Inc. FAU - Monici, Maria C AU - Monici MC AD - Clinica Neurologia 2, Department of Neurosciences, Psychiatry and Anaesthesiology, Policlinico Universitario, 98125 Messina, Italy. FAU - Rodolico, Carmelo AU - Rodolico C FAU - Toscano, Antonio AU - Toscano A FAU - Messina, Sonia AU - Messina S FAU - Benvenga, Salvatore AU - Benvenga S FAU - Messina, Corrado AU - Messina C FAU - Vita, Giuseppe AU - Vita G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Muscle Nerve JT - Muscle & nerve JID - 7803146 RN - 0 (Proto-Oncogene Proteins c-bcl-2) RN - 0 (fas Receptor) RN - 9002-71-5 (Thyrotropin) SB - IM MH - Adolescent MH - Adult MH - Aged MH - *Apoptosis MH - Biopsy MH - Female MH - Humans MH - In Situ Nick-End Labeling MH - Male MH - Middle Aged MH - Muscle, Skeletal/chemistry/*pathology MH - Muscular Atrophy/etiology/pathology MH - Muscular Diseases/etiology/*pathology MH - Proto-Oncogene Proteins c-bcl-2/analysis MH - Thyroid Diseases/blood/complications/*pathology MH - Thyrotropin/blood MH - fas Receptor/analysis EDAT- 2002/09/05 10:00 MHDA- 2002/09/27 06:00 CRDT- 2002/09/05 10:00 PHST- 2002/09/05 10:00 [pubmed] PHST- 2002/09/27 06:00 [medline] PHST- 2002/09/05 10:00 [entrez] AID - 10.1002/mus.10212 [doi] PST - ppublish SO - Muscle Nerve. 2002 Sep;26(3):383-8. doi: 10.1002/mus.10212.