老年人血镁水平降低与血糖代谢异常的关系

Objective To explore the relationship between serum magnesium (Mg) levels and glucose metabolism disorders in the elderly.Methods The data of health examination of 126 elderly people were collected in our hospital.There were 50 patients with type 2 diabetes,35 patients with impaired glucose regulation (IGR) and 41 people with normal glucose.The clinical data of the three groups were compared and analyzed.Results (1)There were no significant differences in age,body mass index (BMI) and blood lipid level among the three groups.The mean serum Mg level was lower in normal glucose group [(0.84±0.1) mmol/L] than in diabetic group [(0.75±0.11) mmol/L,P＜0.01] and IGR group [(0.78±0.12) mmol/L,P＜0.05].(2)The prevalence of hypomagnesemia was higher in diabetic group and IGR group than in normal glucose group (24%,28.6% vs.7.3%,P＜ 0.01 ).(3)The correlation study showed that the serum magnesium level was negatively associated with fasting plasma glucose and HbA1c (r= - 0.343,- 0.271,P＜0.01 ),but not associated with age and BMI.Conclusions The low serum magnesium level is associated with glucose metabolism disorders in the elderly.     

老年人血镁水平降低与血糖代谢异常的关系

目的 探讨老年人血镁水平降低与血糖代谢异常的关系.方法 收集我院门诊126例老年人的查体资料,其中2型糖尿病患者50例,糖调节异常者35例,血糖正常者41例,对3组老年人临床资料进行比较分析.结果 (1)3组的年龄、体质指数、血脂水平差异均无统计学意义,糖尿病组和糖调节异常组血清镁明显低于血糖正常组,分别为(0.75±0.11)mmol/L和(0.78±0.12)mmol/L对(0.84±0.1)mmol/L,差异有统计学意义(P＜0.01、＜0.05);(2)低血镁发病率在2型糖尿病和糖调节异常组明显高于血糖正常组,分别为24.0%和28.6%对7.3%(均为P＜0.01);(3)相关分析结果显示,血镁水平与空腹血糖及糖化血红蛋白水平呈明显负相关(r=-0.343、-0.271,均为P＜0.01),与年龄及体质指数无相关.结论 老年人血清镁水平降低与血糖代谢异常有关.

Abstract：

Objective To explore the relationship between serum magnesium (Mg) levels and glucose metabolism disorders in the elderly.Methods The data of health examination of 126 elderly people were collected in our hospital.There were 50 patients with type 2 diabetes,35 patients with impaired glucose regulation (IGR) and 41 people with normal glucose.The clinical data of the three groups were compared and analyzed.Results (1)There were no significant differences in age,body mass index (BMI) and blood lipid level among the three groups.The mean serum Mg level was lower in normal glucose group [(0.84±0.1) mmol/L] than in diabetic group [(0.75±0.11) mmol/L,P＜0.01] and IGR group [(0.78±0.12) mmol/L,P＜0.05].(2)The prevalence of hypomagnesemia was higher in diabetic group and IGR group than in normal glucose group (24%,28.6% vs.7.3%,P＜ 0.01 ).(3)The correlation study showed that the serum magnesium level was negatively associated with fasting plasma glucose and HbA1c (r= - 0.343,- 0.271,P＜0.01 ),but not associated with age and BMI.Conclusions The low serum magnesium level is associated with glucose metabolism disorders in the elderly.     

不同糖耐量状态下空腹血浆肥胖抑制素水平及其与脂代谢的相关性

Objective To investigate whether fasting obestatin level is different in patients with impaired glucose tolerance or type 2 diabetes, and to explore the association between obestatin and lipid metabolism. Methods Eighty-four subjects without known diabetes were divided into three groups: normal glucose tolerance(NGT), impaired glucose tolerance (IGT) and type 2 diabetes (DM) Plasma obestatin levels were measured with a radioimmunoassay. The relationship between fasting obestatin levels and metabolic parameters was also analyzed. Results Fasting obestatin levels were lower in DM group [(2.82±0.78)ng/ml] and IGT group [(3.25±0.29)ng/ml] than in NGT group[(3.55±0.57) ng/ml, P＜0.01]. Triglycerides and low density lipoprotein cholesterol levels gradually increased among the three groups (P＜0.05). Multiple linear regression analysis revealed fasting obestatin level was independently associated with waist-to-hip ratio, triglyeride and low density lipoprotein cholesterol. The regression equation was obestatin=6.953-3.412×W/H-0.175×TG-0.123×LDL-C. Conclusions The decreased obestatin may be associated with IGR and T2DM, and obestatin level may be associated with lipid metabolism.     

不同糖耐量状态下空腹血浆肥胖抑制素水平及其与脂代谢的相关性

Objective To investigate whether fasting obestatin level is different in patients with impaired glucose tolerance or type 2 diabetes, and to explore the association between obestatin and lipid metabolism. Methods Eighty-four subjects without known diabetes were divided into three groups: normal glucose tolerance(NGT), impaired glucose tolerance (IGT) and type 2 diabetes (DM) Plasma obestatin levels were measured with a radioimmunoassay. The relationship between fasting obestatin levels and metabolic parameters was also analyzed. Results Fasting obestatin levels were lower in DM group [(2.82±0.78)ng/ml] and IGT group [(3.25±0.29)ng/ml] than in NGT group[(3.55±0.57) ng/ml, P＜0.01]. Triglycerides and low density lipoprotein cholesterol levels gradually increased among the three groups (P＜0.05). Multiple linear regression analysis revealed fasting obestatin level was independently associated with waist-to-hip ratio, triglyeride and low density lipoprotein cholesterol. The regression equation was obestatin=6.953-3.412×W/H-0.175×TG-0.123×LDL-C. Conclusions The decreased obestatin may be associated with IGR and T2DM, and obestatin level may be associated with lipid metabolism.     

Protective effect of rhIL-1β on pancreatic islets of alloxan-induced diabetic rats

AIM:To observe the protective effect of rhIL-1β on pancreatic islets of alloxan-induced diabetic rats. METHODS:Protection of rhIL-1β on pancreatic islets of alloxan-induced diabetic rats(n=5)was demonstrated with methods of immunohistochemistry and stereology.The concentration of serum glucose was measured by GOD method and that of serum insulin by RIA. RESULTS:The concentration of serum glucose increased but that of insulin decreased after administration of alloxan (150 mg/kg),and the volume density and numerical density of the islets were zero.In rhIL-1β pretreated rats, although the concentration of serum insulin decreased(from 11.9±3.0 mIU/L to 6.1±1.6 mIU/L,P<0.05),that of glucose was at normal level compared with the control group. As compared with alloxan group,the concentration of serum glucose in rhIL-1β pretreated rats decreased(from 19.4±8.9 mmol/L to 12.0±4.0 mmol/L,P<0.05)and the volume density increased(0/L to.1/L,P<0.05). CONCLUSION:rhIL-1β pretreatment may have protective effect on the islets of alloxan-induced diabetic rats.     

Effect of insulin and metformin on methylation and glycolipid metabolism of peroxisome proliferator-activated receptor γcoactivator-1A of rat offspring with gestational diabetes mellitus

Objective:To discuss the effect of insulin and metformin on amethylation and glycolipid metabolism of peroxisome proliferator-activated receptor γ coactivator-1A(PPARGC1A) of rat offspring with gestational diabetes mellitus(GDM).Methods:A total of 45 pregnant rats received the intraperitoneal injection of streptozotocin to establish the pregnant rat model of GDM.A total of 21 pregnant rats with GDM were randomly divided into three groups,with 7ruts in each group,namely the insulin group,metformin group and control group.Rats in the insulin group received the abdominal subcutaneous injection of 1 mL/kg recombinant insulin glargine at 18:00 every day.Rats in the metformin group received the intragastric infusion of metformin hydrochloride at 18:00 every day,with the first dose of 300 mg/kg.The doses of two groups were adjusted every 3 d to maintain the blood glucose level at 2.65-7.62 mmol/L.Rats in the control group received the intragastric infusion of 1 mL normal saline at 18:00 every day.After the natural delivery of pregnant rats.10 offspring rats were randomly selected from each group.At birth,4 wk and 8 wk after the birth of offspring rats,the weight of offspring rats was measured.The blood glucose level of offspring rats was measured at 4wk and 8 wk,while the level of serum insulin,triglyceride and leptin was measured at 8 wk.Results:The weight of offspring rats at birth in the insulin group and metformin group was significantly lower than the one in the control group(P0.05),and there was no significant difference at 4 wk and 8 wk among three groups(P0.05).The fasting blood glucose and random blood glucose in the insulin group and metformin group at 4 wk and 8 wk were all significantly lower than ones in the control group(P0.05);there was no significant difference between the insulin group and metformin group(P0.05).The expression of PPARGC1 A mRNA in the insulin group and metformin group was significantly higher and the methylation level of PPARGC1 A was significantly lower than the one in the control group(P0.05),but there was no significant difference between the insulin group and metformin group(P0.05).Insulin and leptin at 8 wk in the insulin group and metformin group were significantly higher,while triglyceride was significantly lower than the one in the control group(P0.05);triglyceride level of rats in the insulin group was significantly higher than the one in the metformin group(P0.05).There was no significant difference in insulin and leptin level of offspring rats between the insulin group and metformin group(P0.05).Conclusions:GDM can induce the methylation of PPARGC1 A of offspring rats to reduce the expression of PPARGC1 A mRNA and then cause the disorder of glycolipid metabolism when the offspring rats grow up;the insulin or metformin in the treatment of pregnant rats with GDM can reduce the methylation level of PPARGC1 A and thus improve the abnormal glycolipid metabolism of offspring rats.     

健康高龄老年人甲状腺激素水平变化趋势分析

Objective To explore the variation tendency of serum thyroid hormone level in the elderly aged over 80 years.Methods The 602 healthy volunteers were divided into 3 groups by age:young group (20-59 years of age,n= 226),elderly group (60-79 years of age,n= 195),and advanced age group (80-102 years of age,n=181).Fasting blood of all persons was harvested,then the levels of serum total triiodothyroxine (TT3),total thyroxine (TT4),free tri-iodothyronine (FT3),free thyroxine (FT4),thyroid-stimulating hormone (TSH) and reverse tri-iodothyronine (rT3) were determined by chemistry luminescence technique and radioimmunoassay.Statistical analysis was made by the software SPSS 13.0.Results The levels of serum FT3 and TT3 were lower in elderly group than in young group (t=2.793,3.627,P=0.005,0.000).There were significant differences in the levels of serum TT3,TT4,FT3,TSH and rT3 between young group and advanced-age group (t =10.930,6.065,15.398,- 2.933,- 5.643,all P = 0.000),also between elderly group and advanced-age group (t= 8.382,4.298,11.573,-3.383,-5.148,all P＜0.001).The levels of serum FT3,TT3 and TT4 were negatively correlated with age (r=- 0.51,-0.39 and -0.25,respectively,all P＜0.01).And the levels of serum rT3 and TSH showed positive relationships with age (r=0.32,0.12,all P＜0.01).There were no relationships between the level of serum FT4 and age.The positive rate of serum TT3,TT4,FT3,FT4,TSH and rT3 concentration beyond the reference value was 0,0,13.8%,0,6.6% and 21% in advanced-age group,respectively.Conclusions The levels of serum thyroid hormone and thyroid-stimulating hormone change with age.The levels of FT3,rT3 and TSH change obviously in the elderly aged over 80 years.It could reduce the false positive rate in clinical practice if normal reference range for serum thyroid hormone levels in different aged elderly is established.     

健康高龄老年人甲状腺激素水平变化趋势分析

Objective To explore the variation tendency of serum thyroid hormone level in the elderly aged over 80 years.Methods The 602 healthy volunteers were divided into 3 groups by age:young group (20-59 years of age,n= 226),elderly group (60-79 years of age,n= 195),and advanced age group (80-102 years of age,n=181).Fasting blood of all persons was harvested,then the levels of serum total triiodothyroxine (TT3),total thyroxine (TT4),free tri-iodothyronine (FT3),free thyroxine (FT4),thyroid-stimulating hormone (TSH) and reverse tri-iodothyronine (rT3) were determined by chemistry luminescence technique and radioimmunoassay.Statistical analysis was made by the software SPSS 13.0.Results The levels of serum FT3 and TT3 were lower in elderly group than in young group (t=2.793,3.627,P=0.005,0.000).There were significant differences in the levels of serum TT3,TT4,FT3,TSH and rT3 between young group and advanced-age group (t =10.930,6.065,15.398,- 2.933,- 5.643,all P = 0.000),also between elderly group and advanced-age group (t= 8.382,4.298,11.573,-3.383,-5.148,all P＜0.001).The levels of serum FT3,TT3 and TT4 were negatively correlated with age (r=- 0.51,-0.39 and -0.25,respectively,all P＜0.01).And the levels of serum rT3 and TSH showed positive relationships with age (r=0.32,0.12,all P＜0.01).There were no relationships between the level of serum FT4 and age.The positive rate of serum TT3,TT4,FT3,FT4,TSH and rT3 concentration beyond the reference value was 0,0,13.8%,0,6.6% and 21% in advanced-age group,respectively.Conclusions The levels of serum thyroid hormone and thyroid-stimulating hormone change with age.The levels of FT3,rT3 and TSH change obviously in the elderly aged over 80 years.It could reduce the false positive rate in clinical practice if normal reference range for serum thyroid hormone levels in different aged elderly is established.     

Protective effect of rhIL-1β on pancreatic islets of alloxan-induced diabetic rats

AIM: To observe the protective effect of rhIL-1β on pancreatic islets of alloxan-induced diabetic rats. METHODS: Protection of rhIL-1β on pancreatic islets of alloxan-induced diabetic rats (n=5) was demonstrated with methods of immunohistochemistry and stereology. The concentration of serum glucose was measured by GOD method and that of serum insulin by RIA. RESULTS: The concentration of serum glucose increased but that of insulin decreased after administration of alloxan (150mg/kg), and the volume density and numerical density of the islets were zero. In rhIL-1β pretreated rats, although the concentration of serum insulin decreased (from 11.9&#177;3.0mIU/L to 6.1&#177;1.6mIU/L,P&lt;0.05), that of glucose was at normal level compared with the control group. As compared with alloxan group, the concentration of serum glucose in rhIL-1β pretreated rats decreased (from 19.4&#177;8.9mmol/L to 12.0&#177;4.0mmol/L, P&lt;0.05) and the volume density increased(0/L to. 1/L, P&lt;0.05). CONCLUSION: rhIL-1β pretreatment may have protective effect on the islets of alloxan-induced diabetic rats.     

非酒精性脂肪性肝病患者血清瘦素和脂联素与胰岛素抵抗的关系

Objective To investigate the serum leptin and adiponectin levels in nonalcoholic fatty liver disease (NAFLD) patients, and their relationship with insulin resistance. Methods A total of 120 cases were enrolled and divided into two groups: NAFLD group (n = 60) and normal control group (n = 60). The serum levels of leptin and adiponectin were measured by EL1SA. The body mass index (BMI), waist-to-hip ratio (WHR), triglyceride (TG), total cholesterol (Tchol), high-density lipoprotein cholesterol (HDL-C), aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyl transpeptidase (GGT), fasting blood glucose (FBG) and HOMA-IR (homeostasis model assessment insulin resistance) were detected and analyzed. Results Compared with control group, the serum leptin level in NAFLD group was Significantly higher [(12.37 ± 1.99) μg/Lvs (5.20 ± 1.03)μg/L,P<0.01], while the serum adiponectin level was significantly lower [(12.69 ± 2.83) mg/L vs (22.83 ± 4.61) mg/L, P < 0.01]. HOMA-IR was also much higher in NAFLD group than that in control group[(4.86 ± 0.63) vs (1.91 ± 0.41), P < 0.01]. Logistic regression analysis showed that leptin was positively correlated with WHR ( P = 8.175, P < 0.01), HOMA-IR ( P = 0.974, P < 0.01 ), FBG ( β = 0.564, P < 0.01). In contrast, adiponectin inversely associated with HOMA-IR ( β = -0.495, P < 0.01 ) and BMI ( β = -0.314, P < 0.01) respectively. Conclusions The increased serum leptin level and decreased serum adiponectin level in NAFLD patients independently associated with HOMA-IR.