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Titolo:
INFLUENCE OF CHRONIC STRETCHING UPON RAT SOLEUS MUSCLE DURING NON-WEIGHT BEARING CONDITIONS
Autore:
LETERME D; CORDONNIER C; MOUNIER Y; FALEMPIN M;
Indirizzi:
UNIV SCI & TECH LILLE FLANDRES ARTOIS,PHYSIOL STRUCT CONTRACTILES LAB,BATIMENT SN4 F-59655 VILLENEUVE DASCQ FRANCE
Titolo Testata:
Pflugers Archiv
fascicolo: 2, volume: 429, anno: 1994,
pagine: 274 - 279
SICI:
0031-6768(1994)429:2<274:IOCSUR>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-CHAIN ISOFORMS; HINDLIMB SUSPENSION; SKELETAL-MUSCLES; DIFFERENT LENGTHS; IID ISOFORM; MYOSIN; IMMOBILIZATION; WEIGHTLESSNESS; EXPRESSION; RECOVERY;
Keywords:
SOLEUS; ATROPHY; NON-WEIGHT-BEARING; IMMOBILIZATION; CONTRACTILE PROPERTIES; MYOSIN; FIBER TYPE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
D. Leterme et al., "INFLUENCE OF CHRONIC STRETCHING UPON RAT SOLEUS MUSCLE DURING NON-WEIGHT BEARING CONDITIONS", Pflugers Archiv, 429(2), 1994, pp. 274-279

Abstract

Morphological, contractile and histochemical properties as well as the myosin heavy chain (MHC) composition of rat soleus muscles were studied after 14 days of non-weight-bearing (NWB) and after immobilizationof the foot in dorsiflexion of NWB rats. Significant reductions in soleus mass, fibre sizes and tetanic tension were found after 14 days ofNWB. Furthermore, a transformation of the slow-twitch soleus muscle towards a faster type was characterized by a decrease in twitch time parameters, an increase in the fast-twitch type IIA fibre proportion andan increase in fast-twitch type MHC isoforms. Our results showed thatthe immobilization of the soleus muscle in a lengthened position during NWB not only prevented the loss of muscular mass and force output, but also counteracted the slow to faster shift in contractile and phenotypical parameters normally associated with NWB conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 14:08:37