Regulation of dihydropyridine receptor and ryanodine receptor gene expression in regenerating skeletal muscle

Yann Péréon, Javier Navarro, Vincenzo Sorrentino, Jean Pierre Louboutin, Jacques Noireaud, Philip Palade

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

One of the the major properties of mature skeletal muscle is its ability to regenerate after injury. The purpose of the present study was to determine whether the expression of genes encoding the dihydropyridine receptor calcium channel (DHPR) and the ryanodine receptor (RyR), which play a critical role in excitation-contraction coupling, is regulated by skeletal muscle regeneration. The process of regeneration was induced by bupivacaine injection in surgically exposed rat extensor digitorum longus (EDL) muscle. After total RNA isolation from the injected and the contralateral control EDL muscles performed 3, 7, 15 and 30 days following injection. Northern blot and RNase protection assays were carried out with four cDNA probes specific for the skeletal and cardiac muscle isoforms of both the DHPR α1-subunit and the RyR. After 3 days, an initial precipitous decrease in the expression of the genes encoding the skeletal muscle isoforms of the DHPR and RyR was observed, followed by an increase. Moreover, regenerating skeletal muscle transiently expressed mRNA for the DHPR cardiac isoform, mainly at the beginning of regeneration. No expression of mRNA for the cardiac RyR was observed. Contraction experiments, performed using EDL muscle at the same times after bupivacaine injection, showed that twitch amplitude was markedly decreased in the absence of external calcium, but only during the early stages of regeneration. Similar findings in relation to expression of skeletal and cardiac muscle DHPR message were previously reported from experiments conducted during early developmental stages using fetal skeletal muscle and muscle cell cultures [Chaudhari N, Beam KG (1993) Dev Biol 155:507-515]. These results suggest that expression of the DHPR cardiac isoform in skeletal muscle could explain certain cardiac-like aspects of excitation-contraction coupling of regenerating skeletal muscle and developing skeletal muscle as well.

Original languageEnglish (US)
Pages (from-to)221-229
Number of pages9
JournalPflugers Archiv European Journal of Physiology
Volume433
Issue number3
DOIs
StatePublished - 1997

Fingerprint

L-Type Calcium Channels
Ryanodine Receptor Calcium Release Channel
Gene expression
Muscle
Skeletal Muscle
Gene Expression
Calcium Channels
Regeneration
Protein Isoforms
Excitation Contraction Coupling
Bupivacaine
Muscles
Injections
Gene encoding
Myocardium
Calcium-Sensing Receptors
Messenger RNA
Ribonucleases
Northern Blotting
Muscle Cells

Keywords

  • Calcium channel
  • Dihydropyridine receptor
  • EDL
  • Excitation-contraction coupling
  • Regeneration
  • Ryanodine receptor
  • Skeletal muscle

ASJC Scopus subject areas

  • Physiology

Cite this

Regulation of dihydropyridine receptor and ryanodine receptor gene expression in regenerating skeletal muscle. / Péréon, Yann; Navarro, Javier; Sorrentino, Vincenzo; Louboutin, Jean Pierre; Noireaud, Jacques; Palade, Philip.

In: Pflugers Archiv European Journal of Physiology, Vol. 433, No. 3, 1997, p. 221-229.

Research output: Contribution to journalArticle

Péréon, Yann ; Navarro, Javier ; Sorrentino, Vincenzo ; Louboutin, Jean Pierre ; Noireaud, Jacques ; Palade, Philip. / Regulation of dihydropyridine receptor and ryanodine receptor gene expression in regenerating skeletal muscle. In: Pflugers Archiv European Journal of Physiology. 1997 ; Vol. 433, No. 3. pp. 221-229.
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