PURPOSE: Leptin, an adipocyte derived cytokine that is closely associated with obesity, was recently shown to be involved in carcinogenesis and cancer progression. Because obesity is a significant risk factor for renal cell carcinoma, we investigated the link between leptin and the development of renal cell carcinoma. MATERIALS AND METHODS: Associations between preoperative serum leptin levels and leptin receptor expression in tumor specimens and various clinicopathological parameters were analyzed in 57 patients with renal cell carcinoma. RESULTS: Serum leptin levels were 1.2 to 16.2 ng/ml (mean 4.5). Of 57 tumors 22 (38.6%) demonstrated high leptin receptor expression. Serum leptin levels were significantly higher in patients with vs without tumor specimen venous invasion (p = 0.030) and higher in patients with high vs low leptin receptor expression (p = 0.019). There were significant associations between high leptin receptor expression and the presence of venous invasion (p = 0.013), histological type (p = 0.0076) and regional lymph node metastasis (p = 0.047). Of 42 patients with N0M0 disease those with serum leptin 5.0 ng/ml or more had significantly shorter progression-free survival than patients with lower levels (p = 0.0043). Multivariate Cox proportional hazards model analysis demonstrated that higher serum leptin was an independent predictor of progression-free survival (p = 0.0406). CONCLUSIONS: Leptin and leptin receptor could have a key role in the invasion of renal cell carcinoma and they could be valuable predictors of progression.
PURPOSE: Leptin, an adipocyte derived cytokine that is closely associated with obesity, was recently shown to be involved in carcinogenesis and cancer progression. Because obesity is a significant risk factor for renal cell carcinoma, we investigated the link between leptin and the development of renal cell carcinoma. MATERIALS AND METHODS: Associations between preoperative serum leptin levels and leptin receptor expression in tumor specimens and various clinicopathological parameters were analyzed in 57 patients with renal cell carcinoma. RESULTS: Serum leptin levels were 1.2 to 16.2 ng/ml (mean 4.5). Of 57 tumors 22 (38.6%) demonstrated high leptin receptor expression. Serum leptin levels were significantly higher in patients with vs without tumor specimen venous invasion (p = 0.030) and higher in patients with high vs low leptin receptor expression (p = 0.019). There were significant associations between high leptin receptor expression and the presence of venous invasion (p = 0.013), histological type (p = 0.0076) and regional lymph node metastasis (p = 0.047). Of 42 patients with N0M0 disease those with serum leptin 5.0 ng/ml or more had significantly shorter progression-free survival than patients with lower levels (p = 0.0043). Multivariate Cox proportional hazards model analysis demonstrated that higher serum leptin was an independent predictor of progression-free survival (p = 0.0406). CONCLUSIONS: Leptin and leptin receptor could have a key role in the invasion of renal cell carcinoma and they could be valuable predictors of progression.
Authors: Abby B Siegel; Shuang Wang; Judith S Jacobson; Dawn L Hershman; Emerson A Lim; Jeanette Yu; Lauren Ferrante; Kalpana M Devaraj; Helen Remotti; Shannon Scrudato; Karim Halazun; Jean Emond; Lorna Dove; Robert S Brown; Alfred I Neugut Journal: Cancer Invest Date: 2010-12 Impact factor: 2.176
Authors: Julia Mendoza-Pérez; Jian Gu; Luis A Herrera; Nizar M Tannir; Shanyu Zhang; Surena Matin; Jose A Karam; Christopher G Wood; Xifeng Wu Journal: Cancer Date: 2017-05-23 Impact factor: 6.860
Authors: Kerstin Stemmer; Diego Perez-Tilve; Gayathri Ananthakrishnan; Anja Bort; Randy J Seeley; Matthias H Tschöp; Daniel R Dietrich; Paul T Pfluger Journal: Dis Model Mech Date: 2012-03-15 Impact factor: 5.758