Up-regulation of the novel proinflammatory adipokines lipocalin-2, chitinase-3 like-1 and osteopontin as well as angiogenic-related factors in visceral adipose tissue of patients with colon cancer |
| |
Authors: | Catalán Victoria Gómez-Ambrosi Javier Rodríguez Amaia Ramírez Beatriz Silva Camilo Rotellar Fernando Hernández-Lizoain José L Baixauli Jorge Valentí Victor Pardo Fernando Salvador Javier Frühbeck Gema |
| |
Institution: | a Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spainb CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Spainc Department of Endocrinology, Clínica Universidad de Navarra, 31008 Pamplona, Spaind Department Surgery, Clínica Universidad de Navarra, 31008 Pamplona, Spain |
| |
Abstract: | BackgroundObesity is widely recognised as an important risk factor for colorectal cancer (CC).AimThe study aimed to evaluate the effect of CC on circulating concentrations and gene expression levels of inflammatory and angiogenesis-related factors in human visceral adipose tissue (VAT).MethodsVAT biopsies were obtained from 18 healthy individuals and 11 patients with CC. Real-time polymerase chain reactions were performed to quantify gene expression levels and zymographic analyses were used to determine the activity of matrix metalloproteinases (MMPs).ResultsPatients with CC exhibited increased mRNA expression levels of lipocalin-2 (P=.014), osteopontin (P=.027), tumor necrosis factor-α (TNF-α) (P=.016) and chitinase-3 like-1 (P=.006) compared to control subjects in VAT. Gene expression levels of hypoxia-inducible factor-1 α, vascular endothelial growth factor and MMP-2 were significantly higher (P<.05) in VAT of patients with CC. The expression of insulin-like growth factor I, insulin growth factor binding protein 3 and MMP-9 followed the same trend, although no significant differences were reached. The enzymatic activity of MMP-9 was increased (P<.001) in patients with CC. Furthermore, individuals with CC showed increased (P<.05) circulating concentrations of the inflammatory markers interleukin-6, tumour necrosis factor α and hepatocyte growth factor, whereas levels of the anti-inflammatory adipokine adiponectin were decreased (P<.01).ConclusionThese findings represent the first observation that mRNA levels of the novel inflammatory factors lipocalin-2, chitinase-3 like-1 and osteopontin are increased in human VAT of subjects with CC. This observation together with the up-regulation of angiogenic factors suggests that adipokines secreted by VAT may be involved in the development of colon cancer. |
| |
Keywords: | Visceral adipose tissue Colon cancer Inflammation Angiogenesis Gene expression |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|