Human C-reactive protein impedes entry of leptin into the CNS and attenuates its physiological actions in the CNS
Biochemical Journal, ISSN: 1470-8728, Vol: 473, Issue: 9, Page: 1215-1224
2016
- 7Citations
- 16Captures
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Metrics Details
- Citations7
- Citation Indexes7
- CrossRef4
- Captures16
- Readers16
- 16
Review Description
Defective central leptin signalling and impaired leptin entry into the CNS (central nervous system) represent two important aspects of leptin resistance in obesity. In the present study, we tested whether circulating human CRP (C-reactive protein) not only diminishes signalling of leptin within the CNS, but also impedes this adipokine's access to the CNS. Peripheral infusion of human CRP together with co-infused human leptin was associated with significantly decreased leptin content in the CSF of ob/ob mice. Furthermore, following peripheral infusion of human leptin, the CSF (cerebrospinal fluid) concentration of leptin in transgenic mice overexpressing human CRP was sharply lower than that achieved in similarly infused wild-type mice. Administration of LPS (lipopolysaccharide) to human CRP-transgenic mice dramatically elevated the concentrations of human CRP in the CSF. The i.c.v. (intracerebroventricular) delivery of human CRP into the lateral ventricles of ob/ob mice blocked the satiety and weight-reducing actions of human leptin, but not those of mouse leptin. I.c.v. injection of human CRP abolished hypothalamic signalling by human leptin, and ameliorated the effects of leptin on the expression of NPY (neuropeptide Y), AgRP (Agouti-related protein), POMC (pro-opiomelanocortin) and SOCS-3 (suppressor of cytokine signalling 3). Human CRP can impede the access of leptin to the CNS, and elevation of human CRP within the CNS can have a negative impact on the physiological actions of leptin.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84975126944&origin=inward; http://dx.doi.org/10.1042/bj20151282; http://www.ncbi.nlm.nih.gov/pubmed/26933237; http://biochemj.org/cgi/doi/10.1042/BJ20151282; https://portlandpress.com/biochemj/article/473/9/1215/49396/Human-C-reactive-protein-impedes-entry-of-leptin; https://dx.doi.org/10.1042/bj20151282
Portland Press Ltd.
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