Seasonal variations of cellular stress response in the heart and gastrocnemius muscle of the water frog (Pelophylax ridibundus)
- 作者：Konstantinos Feidantsis ; Andreas Anestis ; Eleni Vasara ; Pasqualina Kyriakopoulou-Sklavounou ; Basile Michaelidis ; michaeli@bio.auth.gr
- 关键词：Seasonal variations ; Water frog ; Hibernation ; Heart ; Gastrocnemius muscle ; HSPs ; MAPKs
- 刊名：Comparative Biochemistry and Physiology - Part A ; Molecular & Integrative Physiology
- 出版年：2012
- 期刊代码：23_10956433
- 类别：abs
- 出版时间：August, 2012
- 卷：162
- 期：4
- 页码：331-339
- 文件大小：939 K
摘要
The present study aimed to investigate the seasonal cellular stress response in the heart and the gastrocnemius muscle of the amphibian Pelophylax ridibundus (former name Rana ridibunda) during an 8 month acclimatization period in the field. Processes studied included heat shock protein expression and protein kinase activation. The cellular stress response was addressed through the expression of Hsp70 and Hsp90 and the phosphorylation of stress-activated protein kinases and particularly p38 mitogen-activated protein kinase (p38 MAPK), the extracellular signal-regulated kinases (ERK-1/2) and c-Jun N-terminal kinases (JNK1/2/3). Due to a general metabolic depression during winter hibernation, the induction of Hsp70 and Hsp90 and the phosphorylation of p38 MAPK, JNKs and ERKs are retained at low levels of expression in the examined tissues of P. ridibundus. Recovery from hibernation induces increased levels of the specific proteins, probably providing stamina to the animals during their arousal.