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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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A phosphatidylinositol 3-kinase phosphodiesterase 3B-cyclic AMP pathway in hypothalamic action of leptin on feeding.

Using male Sprague-Dawley rats implanted with third intracerebroventricular (ICV) cannulae, we found that cilostamide, a phosphodiesterase 3 (PDE3) inhibitor, (i) reversed the established effects of leptin on food intake and body weight, (ii) blocked, at the hypothalamic level, the leptin- induced tyrosine phosphorylation of signal transducer and activator of transcription 3 (Stat3) and (iii) blocked the DNA binding of p-Stat3. Additionally, ICV administration of leptin increased hypothalamic phosphatidylinositol 3-kinase (PI3K) and PDE3B activities and decreased cyclic AMP (cAMP) concentration. These results indicate that a PI3K-PDE3B-cAMP pathway interacting with the Janus kinase 2 (Jak2)-Stat3 pathway constitutes a critical component of leptin signaling in the hypothalamus.[1]

References

  1. A phosphatidylinositol 3-kinase phosphodiesterase 3B-cyclic AMP pathway in hypothalamic action of leptin on feeding. Zhao, A.Z., Huan, J.N., Gupta, S., Pal, R., Sahu, A. Nat. Neurosci. (2002) [Pubmed]
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