Morphological adaptation of rat skeletal muscle to a cold environment

GEYİKOĞLU F., TEMELLİ A., ÖZKARAL A.

TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES, cilt.26, sa.5, ss.1121-1126, 2002 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 5
  • Basım Tarihi: 2002
  • Dergi Adı: TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.1121-1126
  • Atatürk Üniversitesi Adresli: Evet

Özet

Male Sprague-Dawley rats (SD) were kept in medium between the postnatal 80(th) and 130(th) day while environmental temperature (from 20 to 5 degreesC) and photoperiod were decreased gradually. The weight of the animals adapted to the cold and the weight and length of the external digitorum longus (EDL) muscle were measured. When compared with controls, in a cold environment the weight and fiber length of the muscle was reduced significantly. In addition, EDIL muscle was separated into two (red and white) by using the succinic dehydrogenase (SDH) method and the percentage of fiber types and fiber diameters according to mitochondria contents were measured. Transformations in muscle fibers (from Type IIb to Type IIa), decreases in fiber diameters (particularly Type IIb) and atrophic fibers (in Type IIa and Type IIb) were observed. However, normal values were obtained when the temperature returned to normal.