1. The Novel Mechanism of Recombinant Human Ciliary Neurotrophic Factor on the Anti-diabetes Activity.
- Author
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Qing-Shan Liu, Mei Gao, Shen-Yin Zhu, Shao-Jing Li, Li Zhang, Qiu-Juan Wang, and Guan-Hua Du
- Subjects
CILIARY body ,NEUROTROPHINS ,NEUROPHYSIOLOGY ,NEURON development ,ADIPOSE tissues ,CONNECTIVE tissues - Abstract
In a previous study, the ciliary neurotrophic factor (CNTF) were demonstrated to lead to weight-loss partly by up-regulating the energy metabolism and the expression of uncoupling protein-1, mitochondrial transcription factor A and nuclear respiratory factor-1 in adipose tissues or muscle. To investigate the up-stream regulators of the expression, recombinant human CNTF (rhCNTF) (0.1, 0.3 and 0.9 mg/kg/day subcutaneously) were administered to KK-Ay mice for 30 days, resulting in reduction of perirenal fat mass, serum free fatty acids and islet triacylglycerol; furthermore, the values of oral glucose tolerance test were found improved. In brown adipose tissues, the gene expressions of peroxisome proliferator-activated receptor α (PPARα) and peroxisome proliferator-activated receptor coactivator-1 α (PGC-1α) were found to be up-regulated by rhCNTF. To the best of our knowledge, the changes of gene expression of PPARα and PGC-1α represent new insights into the mechanisms of anti-diabetes by rhCNTF. In addition, the activity of mitochondrial complexII was found to be increased by rhCNTF. Stimulation of PPARα, PGC-1α, uncoupling protein-1 and enhanced activity of mitochondrial complex II may be associated with the effects of anti-diabetes. The present study indicates new mechanisms of the activity and mechanisms on anti-diabetes of rhCNTF, which may be a novel anti-diabetes reagent partly acting by enhancing energy metabolism. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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