Circulating adipocytokines in non-diabetic and Type 1 diabetic children: relationship to insulin therapy, glycaemic control and pubertal development.

AIM: To determine the influence of Type 1 diabetes mellitus on circulating adipocytokines in children. METHODS: The circulating concentrations of leptin, adiponectin, resistin and tumour necrosis factor (TNF)-alpha were measured in 91 children, aged 11.1 +/- 2.7 years, with Type 1 diabetes mellitus (T1DM). Ninety-one healthy children were selected as control subjects. RESULTS: Body mass index-adjusted leptin concentrations were higher in the pubertal diabetic children compared with the control children. There was a significant positive correlation between leptin and daily insulin dose in the diabetic group. Circulating adiponectin concentrations were higher in the prepubertal diabetic children and were positively associated with HbA(1c). Resistin concentrations were lower in the prepubertal non-diabetic subjects compared with the pubertal non-diabetic children, whose values were higher than those of the diabetic children. TNF-alpha concentrations were similar in non-diabetic and diabetic children. CONCLUSIONS: Circulating concentrations of adipocytokines are abnormal in Type 1 diabetic children, although the direction of change differs by cytokine. Pubertal development, in addition to insulin treatment and glycaemic control, also influences the concentrations.     

人resistin基因原核表达载体构建和表达

[目的]构建人resistin基因原核表达载体并观察其表达,为开展对resistin的研究打下实验基础.[方法]酚氯仿一步法从一位2型糖尿病合并胆管癌患者腹壁皮下脂肪组织抽取总RNA,RT-PCR法扩增出re-sistin基因cDNA,经测序后,PCR产物亚克隆入T载体,用EcoRI和KpnI分别酶切重组T质粒和原核表达载体pGENKS,然后resistin基因片段和表达载体通过T4DNA连接酶进行定向连接,用核酸内切酶EcoRI、KpnI酶切和测序方法鉴定出重组表达质粒.重组表达质粒转化大肠杆菌JM109,经1 mmol/LIPTG在32℃诱导表达2 h,裂解细菌,进行PAGE凝胶电泳鉴定融合蛋白的表达.[结果]RT-PCR扩增产物分子大小为327 bp,序列分析表明为人resistin基因完整编码区.PCR产物与T载体连接、转化大肠杆菌后,从细菌质粒中酶切回收了目的片段.重组表达质粒经EcoRI和KpnI双酶切后能产生出327 bp、4 980 bp大小的两个片段,序列分析表明重组表达质粒包含人resistin基因完整编码区,基因编码无移位,PAGE凝胶电泳表明在细菌裂解上清有分子质量为39.5 kD的融合蛋白.[结论]成功构建了人resistin基因原核表达载体,且构建的载体能表达出含目的蛋白的融合蛋白,为下一步研究打下了实验基础.     

抵抗素及其结合多肽对大鼠骨骼肌细胞糖摄取功能的影响

目的探讨抵抗素及其结合多肽(RBP)对大鼠骨骼肌细胞糖摄取功能的影响。方法体外培养的大鼠骨骼肌细胞(L6)随机分为对照组,抵抗素(10 nmol/L)组,RBP(1 nmol/L)组、抵抗素(10 nmol/L) RBP(1 nmol/L)组,培养0.5 h后,液闪计数法(LSC)观察L6细胞糖摄取功能的变化,RT-PCR、Western blot法检测葡萄糖转运载体(GLUT)4基因的表达及转位变化。结果与对照组相比,抵抗素组糖摄取功能下降,RBP组及抵抗素 RBP组糖摄取功能无明显变化(P<0.05);与抵抗素组相比,抵抗素 RBP组糖摄取功能明显上调(P<0.05)。4组L6细胞的GLUT4基因的蛋白表达及转位均无明显变化(P>0.05)。结论抵抗素能抑制骨骼肌细胞的糖摄取;但对正常骨骼肌细胞糖摄取功能无明显影响;RBP但能有效拮抗抵抗素抑制骨骼肌细胞糖摄取的作用。     

血清胃饥饿素、脂肪因子与膝骨关节炎患者骨密度的相关性研究

目的探讨血清胃饥饿素、脂肪因子水平与膝骨关节炎(knee osteoarthritis)患者骨密度(bone mineral density,BMD)之间的相关性。方法本研究选取了164例有症状的膝骨关节炎患者和100位健康人群(对照组)。使用酶联免疫吸附试验(ELISA)测量受试者血清胃饥饿素、脂联素和抵抗素水平。通过双能X线吸收测定法(DXA)测量受试者全身、腰椎、髋部和股骨的BMD。结果膝骨关节炎受试者的全身、腰椎、髋关节、股骨的BMD水平低于对照组(P均<0.05);但脂联素及胃饥饿素水平明显高于对照组(P均<0.05);在单因素分析中,血清胃饥饿素水平与所测量各个部位的骨密度之间有显著的负相关性(P<0.05);脂联素与股骨干骨密度和总股骨骨密度呈显著负相关(P<0.05)。进一步调整年龄、性别、体质量指数(body mass index,BMI)和骨关节炎(osteoarthritis,OA)后,胃饥饿素水平与各个部位的骨密度之间仍然存在显著负相关(P<0.05);脂联素与股骨干、股骨的骨密度之间有显著的相关性(P<0.05)。而血清抵抗素与各部位骨密度在混杂因素调整前后未发现显著相关性。结论血清胃饥饿素和脂联素水平与BMD呈显著负相关,提示胃饥饿素和脂联素对膝骨关节炎患者BMD有潜在的不利影响。     

浅谈甲状腺功能亢进症患者血清抵抗素水平与血糖、血脂及甲状腺激素的关系

目的 对甲状腺功能亢进症患者的血清抵抗素水平与血糖、血脂及甲状腺激素的关系进行分析和探讨.方法 选择2013年4月至2014年5月我院收治的60例甲状腺功能亢进患者作为本次研究的实验组,另选择60例健康人员作为本次的对照组.结果 实验组患者的空腹血糖高于对照组,T-CH、LDL-C低于对照组(P＜0.05);实验组患者的FT3、FT4、胰岛素、抵抗素、HOMA-IR明显高于对照组、TSH明显低于对照组(P＜0.05);甲状腺功能亢进症患者的血清抵抗素水平与FT3 、FT4、HOMA-IR呈正相关关系,与T-CH、LDL-C呈负相关关系.结论 甲状腺功能亢进症患者血清抵抗素水平与血糖、血脂及甲状腺激素有密切的关系.     

孕哺期大鼠全氟辛烷磺酸暴露对子代糖代谢的影响

[目的]探讨孕哺期全氟辛烷磺酸(PFOS)暴露对子代大鼠糖代谢的影响. [方法]将Wistar孕鼠自孕0天(GD0)随机分为对照组(0mg/kg)、低剂量组(0.6 mg/kg)和高剂量组(2mg/kg),每组10只;PFOS灌胃染毒至仔鼠出生后21天(PND21)断乳为止.采用高效液相/质谱法检测PND0、PND21时仔鼠血清PFOS含量;观察仔鼠体重变化趋势;比较9周龄和15周龄仔鼠空腹血糖、空腹胰岛素水平;检测仔鼠瘦素和抵抗素基因表达水平变化. [结果] PND21时低剂量组和高剂量组仔鼠血清中PFOS浓度分别为(16.00±1.27)mg/L和(80.54±6.55) mg/L(P＜0.05).低剂量组雌性仔鼠出生后8、9周龄和高剂量7～9周龄,低剂量组雄性仔鼠出生8～12周龄、高剂量7、8、10周龄的体重均明显低于对照组(均P＜ 0.05).高剂量组9周龄和低剂量组15周龄雌性仔鼠的胰岛素水平分别为(10.85±1.37)mU/L和(13.62±1.87) mU/L,均高于对照组(P＜0.05);高剂量组9周龄雄性仔鼠的空腹血糖和胰岛素水平分别为(5.43±0.77) mmol/L和(13.23±1.81)mU/L,15周龄雄性仔鼠低剂量组分别为(4.99±0.54) mmol/L和(13.57±1.22)mU/L,15周龄高剂量组分别为(5.71±0.56) mmol/L和(13.44±2.97)mU/L,均高于对照组(P＜0.05).高剂量组15周龄雄性仔鼠的抵抗素基因表达上调1.25±0.03(P＜ 0.05),瘦素基因表达下调0.67±0.08(P＜0.05). [结论]PFOS孕哺期暴露可能引起子代大鼠糖代谢异常,增加糖尿病患病风险.     

Association between serum resistin level and outcomes in kidney transplant recipients

Resistin is an adipocytokine that is associated with inflammation, coronary artery disease, and other types of cardiovascular disease among patients with normal kidney function. However, little is known about the association of resistin with outcomes in kidney transplant recipients. We collected socio‐demographic and clinical parameters, medical and transplant history, and laboratory data from 988 prevalent kidney transplant recipients enrolled in the Malnutrition‐Inflammation in Transplant—Hungary Study (MINIT‐HU study). Serum resistin levels were measured at baseline. Associations between serum resistin level and death with a functioning graft over a 6‐year follow‐up period were examined in unadjusted and adjusted models. The mean±SD age of the study population was 51 ± 13 years, among whom 57% were men and 21% were diabetics. Median serum resistin concentrations were significantly higher in patients who died with a functioning graft as compared to those who did not die during the follow‐up period (median [IQR]: 22[15–26] vs. 19[14–22] ng/ml, respectively; P < 0.001). Higher serum resistin level was associated with higher mortality risk in both unadjusted and fully adjusted models: HRs (95% CI): 1.33(1.16–1.54) and 1.21(1.01–1.46), respectively. In prevalent kidney transplant recipients, serum resistin was an independent predictor of death with a functioning graft.