Abstract | BACKGROUND: Patients undergoing chronic hemodialysis (HD) have an impaired immune response with a dysregulated Th1/Th2 cytokine network and altered the levels of thyroid hormone (TH) in euthyroid sick syndrome. Leptin, an adipocyte-secreted hormone, is considered to be a proinflammatory adipocytokine, with multiple effects on several tissues acting on the intermediate and energy metabolism. The aims of the present study were to assess the changes in serum levels of leptin and their correlation with Th1/Th2 cytokine and TH production in HD patients. METHODS: RESULTS: Mean serum leptin concentration was significantly higher in HD patients than that in controls (p<0.01), especially in women (p<0.001). While the fasting serum levels of sIL-2R and Th1-type cytokines including IL-2 and IFN-gamma were significantly higher in HD patients compared with controls, Th2-type cytokine, including IL-4 and IL-10, levels did not differ between patients and controls. The serum TT3 and FT3 levels were lower in patients than controls, but TT4, FT4 and TSH were no different. Serum leptin levels in HD patients were significantly positively correlated with IL-2, IFN-gamma, sIL-2R and TSH; and negatively correlated with IL-4, IL-10, TT3 and FT3. Serum IL-2 levels correlated positively with serum IL-4, sIL-2R, TT3 and FT3. A negative correlation was observed between serum IFN-gamma and IL-4 levels in the patients. CONCLUSIONS: These data suggest that hyperleptinemia in HD patients correlated with cytokine dysregulation with a high level of Th1-type cytokines, and euthyroid sick syndrome with low T3 levels which might be involved in Th1 polarization and low-T3 syndrome in dialysis patients.
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Authors | Mao-Lin Liu, Zi-Yan Huang, Xiao-Chun Zhong, Su-Hang Liu, Gang Xu, Ting-Ying Jiang, Wei-Wei Xi, Wei-Qi Yan |
Journal | Journal of nephrology
(J Nephrol)
2009 Jul-Aug
Vol. 22
Issue 4
Pg. 515-22
ISSN: 1121-8428 [Print] Italy |
PMID | 19662608
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Cytokines
- Leptin
- Triiodothyronine
- Thyrotropin
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Topics |
- Adult
- Aged
- Cell Polarity
- Cytokines
(biosynthesis)
- Euthyroid Sick Syndromes
(immunology)
- Female
- Humans
- Leptin
(blood)
- Male
- Middle Aged
- Renal Dialysis
- Th1 Cells
(physiology)
- Thyrotropin
(blood)
- Triiodothyronine
(blood)
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