预测 2 型糖尿病的血清脂肪因子在皮下和内脏脂肪组织中的基因表达。

Subcutaneous and visceral adipose tissue gene expression of serum adipokines that predict type 2 diabetes.

机构信息

[1] Department of Endocrinology, St Vincent's Hospital, Darlinghurst, New South Wales, Australia [2] Diabetes and Obesity Program, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.

出版信息

Obesity (Silver Spring). 2010 May;18(5):884-9. doi: 10.1038/oby.2009.443. Epub 2009 Dec 17.

Abstract

Type 2 diabetes mellitus (T2D) is predicted by central obesity and circulating adipokines regulating inflammation. We hypothesized that visceral adipose tissue (VAT) in T2D expresses greater levels of proinflammatory molecules. Paired samples of subcutaneous (SAT) and VAT were excised at elective surgery (n = 16, 6 with T2D, n = 8 age- and gender- matched controls). Metabolic parameters were measured in the fasted state: body composition by dual-energy X-ray absorptiometry and insulin action by hyperinsulinemic-euglycemic clamp. Adipose tissue mRNA gene expression was measured by quantitative reverse transcriptase-PCR. Subjects with T2D had higher VAT expression of molecules regulating inflammation (tumor necrosis factor-alpha (TNFalpha), macrophage inflammatory protein (MIP), interleukin-8 (IL-8)). Fasting glucose related to VAT expression of TNFalpha, MIP, serum amyloid A (SAA), IL-1alpha, IL-1beta, IL-8, and IL-8 receptor. Abdominal fat mass was related to VAT expression of MIP, SAA, cAMP response element-binding protein (CREBP), IL-1beta, and IL-8. Insulin action related inversely to VAT complement C3 expression only. There were depot-specific differences in expression of serum T2D predictors: VAT expressed higher levels of complement C3; SAT expressed higher levels of retinol-binding protein-4 (RBP4), adiponectin, and leptin. In summary, VAT in T2D expresses higher levels of adipokines involved in inflammation. VAT expression of these molecules is related to fasting glucose and insulin action. Increased production of these proinflammatory molecules by VAT may explain the links observed between visceral obesity, insulin resistance, and diabetes risk.

摘要

2 型糖尿病(T2D)是由中心性肥胖和循环脂肪因子调节炎症所预测的。我们假设 2 型糖尿病患者的内脏脂肪组织(VAT)表达更高水平的促炎分子。在择期手术中切除了配对的皮下(SAT)和 VAT 样本(n = 16,6 例 T2D,n = 8 例年龄和性别匹配的对照)。在禁食状态下测量代谢参数:双能 X 射线吸收法测量身体成分,高胰岛素正葡萄糖钳夹测量胰岛素作用。通过定量逆转录-PCR 测量脂肪组织 mRNA 基因表达。T2D 患者 VAT 中调节炎症的分子(肿瘤坏死因子-α(TNFalpha)、巨噬细胞炎性蛋白(MIP)、白细胞介素-8(IL-8))表达较高。空腹血糖与 TNFalpha、MIP、血清淀粉样蛋白 A(SAA)、IL-1alpha、IL-1beta、IL-8 和 IL-8 受体的 VAT 表达相关。腹部脂肪量与 VAT 表达的 MIP、SAA、cAMP 反应元件结合蛋白(CREBP)、IL-1beta 和 IL-8 相关。胰岛素作用仅与 VAT 补体 C3 表达呈负相关。血清 T2D 预测因子的表达存在部位特异性差异:VAT 表达更高水平的补体 C3;SAT 表达更高水平的视黄醇结合蛋白-4(RBP4)、脂联素和瘦素。总之,2 型糖尿病患者的 VAT 表达更高水平的参与炎症的脂肪因子。这些分子的 VAT 表达与空腹血糖和胰岛素作用有关。VAT 产生这些促炎分子的增加可能解释了内脏肥胖、胰岛素抵抗和糖尿病风险之间观察到的联系。

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