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Titolo:
Early-age heat exposure affects skeletal muscle satellite cell proliferation and differentiation in chicks
Autore:
Halevy, O; Krispin, A; Leshem, Y; McMurtry, JP; Yahav, S;
Indirizzi:
Hebrew Univ Jerusalem, Dept Anim Sci, IL-76100 Rehovot, Israel Hebrew UnivJerusalem Rehovot Israel IL-76100 , IL-76100 Rehovot, Israel Agr Res Org, Volcani Ctr, Inst Anim Sci, IL-50250 Bet Dagan, Israel Agr Res Org Bet Dagan Israel IL-50250 im Sci, IL-50250 Bet Dagan, Israel ARS, USDA, Growth Biol Lab, Beltsville, MD 20705 USA ARS Beltsville MD USA 20705 DA, Growth Biol Lab, Beltsville, MD 20705 USA
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
fascicolo: 1, volume: 281, anno: 2001,
pagine: R302 - R309
SICI:
0363-6119(200107)281:1<R302:EHEASM>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
GROWTH-FACTOR-I; MESSENGER-RIBONUCLEIC-ACID; MALE BROILER-CHICKENS; IGF-I; GENE-EXPRESSION; DOMESTIC-FOWL; MYOD FAMILY; INSULIN; MYOGENESIS; HORMONE;
Keywords:
thermal conditioning; muscle differentiation; growth factors; myoblasts; stress;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Halevy, O Hebrew Univ Jerusalem, Dept Anim Sci, POB 12, IL-76100 Rehovot, Israel Hebrew Univ Jerusalem POB 12 Rehovot Israel IL-76100 ot, Israel
Citazione:
O. Halevy et al., "Early-age heat exposure affects skeletal muscle satellite cell proliferation and differentiation in chicks", AM J P-REG, 281(1), 2001, pp. R302-R309

Abstract

Exposure of young chicks to thermal conditioning (TC; i.e., 37 degreesC for 24 h) resulted in significantly improved body and muscle growth at a later age. We hypothesized that TC causes an increase in satellite cell proliferation, necessary for further muscle hypertrophy. An immediate increase wasobserved in satellite cell DNA synthesis in culture and in vivo in response to TC of 3-day-old chicks to levels that were significantly higher than those of control chicks. This was accompanied by a marked induction of insulin-like growth factor-I (IFG-I), but not hepatocyte growth factor in the breast muscle. No significant difference between treatments in plasma IGF-I levels was observed. A marked elevation in muscle regulatory factors on day 5, followed by a decline in cell proliferation on day 6 together with continuous high levels of IGF-I in the TC chick muscle may indicate accelerated cell differentiation. These data suggest a central role for IGF-I in the immediate stimulation of satellite cell myogenic processes in response to heat exposure.

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Documento generato il 02/10/20 alle ore 02:00:29