TY - JOUR AU1 - Péréon, Yann AU2 - Dettbarn, Christine AU3 - Lu, Ying AU4 - Westlund, Karin N. AU5 - Zhang, Jian-Ting AU6 - Palade, P. AB -  The expression of isoform-specific dihydropyridine receptor Ca2+ channel (DHPR) α1-subunit genes in rat diaphragm, soleus and extensor digitorum longus muscles was investigated using RNase protection assays. As expected, mRNA expression levels for the DHPR skeletal muscle isoform were highest in extensor digitorum longus. Unexpectedly, both diaphragm and soleus expressed mRNA for the cardiac isoform at a significant level. Moreover, immunohistochemical experiments provided evidence of the cardiac DHPR isoform at the protein level in muscle fibres. The presence of the cardiac DHPR in the soleus and diaphragm is consistent with a degree of reported cardiac-like excitation-contraction coupling in these muscles, and may be an explanation for some of the therapeutic effects of theophylline in asthmatics, but is likely to serve some other role(s) as well. TI - Dihydropyridine receptor isoform expression in adult rat skeletal muscle JF - Pflügers Archiv European Journal of Physiologyl of Physiology DO - 10.1007/s004240050637 DA - 1998-06-29 UR - https://www.deepdyve.com/lp/springer-journals/dihydropyridine-receptor-isoform-expression-in-adult-rat-skeletal-LcxuQj5F9s SP - 309 EP - 314 VL - 436 IS - 3 DP - DeepDyve ER -