【摘要】 目的 探讨血浆内脏脂肪素(visfatin)与2型糖尿病的关系。方法 2007年7月—9月选取2型糖尿病患者和正常对照组各40例。根据体重指数再分为超重肥胖组和非超重肥胖组。检测visfatin水平、空腹血糖、空腹胰岛素、血脂、血压等,计算腰臀比、体重指数、稳态模型胰岛素抵抗指数homeostasis model assessment of insulin resistance,HOMAIR)及胰岛素分泌功能(HOMAβ)。结果 2型糖尿病组血浆visfatin水平显著低于正常对照组(Plt;0.05)。多元逐步相关分析表明,在肥胖的2型糖尿病个体中visfatin与高密度脂蛋白胆固醇、空腹血糖、体重指数呈负相关。二分类Logstic回归分析显示血浆visfatin及胰岛素抵抗指数与2型糖尿病的发生显著相关,回归方程式为Y=7.681+2.417 ln HOMAIR-2.549 visfatin。结论 visfatin的变化可能对2型糖尿病的发生、发展具有一定作用。
ObjectiveTo systematically evaluate the changes in placental protein expressions in gestational diabetes mellitus (GDM) and their correlations with maternal insulin resistance (IR). Methods PubMed, Cochrane Library, Scopus, Web of Science, Embase, China National Knowledge Infrastructure, VIP database, Wanfang Database and CBMdisc were searched for case-control studies published from January 2009 to November 2021, which reported the placental protein expressions in GDM and their correlations with IR. Two researchers independently reviewed the literature, extracted data and evaluated the literature quality. RevMan 5.4 software was used for meta-analysis, and descriptive analysis was performed on data that cannot be combined. ResultsA total of 19 studies were included, comprising 2 012 patients. The results of meta-analysis showed that: the expression level of retinol binding protein 4 (RBP4) [standard mean difference=2.11, 95% confidence interval (CI) (1.64, 2.58), P<0.000 01] and the positive rate of protein tyrosine phosphatase-1B (PTP1B) [relative risk (RR)=1.56, 95%CI (1.29, 1.88), P<0.000 01] were up-regulated, and the positive rate of insulin receptor substrate 1 (IRS-1) [RR=0.69, 95%CI (0.60, 0.78), P<0.000 01] was down-regulated. The protein expression levels of RBP4 (P<0.000 01) and PTP1B (P<0.000 01) were positively correlated with homeostasis model assessment of insulin resistance (HOMA-IR), while the protein expression levels of IRS-1 (P<0.000 01) and APN (P=0.002) were negatively correlated with HOMA-IR, and glucose transporter 4 (GLUT 4) was not correlated with HOMA-IR (P=0.79). Descriptive analysis found that the expression levels or positive rates of adipocytokines (leptin, resistin), oxidative stress markers (xanthione oxidase, malondialdehyde, 8-isoprostaglandin),inflammatory factors (tumor necrosis factor α, Toll-like receptor 4, Galectin-3, Galectin-2, migration inhibitory factor),fetuin-A, forkhead box transcription factor 1, forkhead box transcription factor 3a and estrogen receptor α in GDM placenta were up-regulated and all were positively correlated with HOMA-IR. The expression levels or positive rates of insulin signaling pathway proteins [phosphoinositide 3-kinase (PI3K), protein kinases B (AKT), phospho-protein kinases B (p-AKT), GLUT 4] were down-regulated, PI3K and AKT were negatively correlatedwith HOMA-IR, while p-Akt had no correlation with HOMA-IR. ConclusionsThe dysregulation of placental protein expressions may mediate maternal IR exacerbation, thus promote the occurrence and development of GDM and other pregnancy complications. The causal relationship and regulatory mechanism are still unclear, which need to be further studied.
Objective To establish a stable colorectal cancer model in liver specific insulin-like growth factor (IGF)-1 deficient (LID) mice and examine the potential relationship between IGF-1 level and risk of mice constitutional colorectal cancer. Methods ①Establishment of a colorectal cancer model: The LID mice, in which IGF-1 level in circulation was 25% of BALB/c mice. Induction of colorectal cancer was achieved by using the 1,1 Dimethylhydrazine (DMH) with hypodermic injection at transverse part. ②Eighty fresh samples of cancer tissues and adjacent tissues were obtained from LID mice (experimental group) and BALB/c mice (control group). The expression of IGF-1 was studied by immunohistochemical assay (SP method). Results ①Weight loss occurred in both experimental group and control group after injection. Compared with the body weight before injection on 18 weeks and 24 weeks in each group, there were significant differences after injection at the same phase in each group (P＜0.05). ②The results of IGF-1 expression in cancer tissues and adjacent tissues: IGF-1 got a diffuse distribution in cancer cell cytoplasm. The positive expressions of IGF-1 in the cancer tissues and their adjacent cancer tissues were 6/7, 2/7 and 13/16, 7/16 respectively in experimental group and control group. There were significant differences between the cancer tissues and adjacent tissues inside both groups (P＜0.05). There were no significant differences inside both of cancer tissues and adjacent tissues respectively between experimental group and control group (Pgt;0.05). Conclusion In the established colorectal cancer model by DMH, IGF-1 plays an important role in the development and progression of colorectal cancer.
Objective To study the therapeutic effect of Roux-en-Y gastric bypass （RYGB） on type 2 diabetes mellitus （T2DM） rats and explore the possible mechanism of vaspin in RYGB on T2DM. Methods Twenty SD rats with T2DM and 20 age- and sex-matched normal SD rats were randomly divided into 4 groups according to the random digits table：T2DM-RYGB group， T2DM-sham operation （SO） group，RYGB group，and SO group，10 rats in each group. Fasting plasma glucose （FPG） level，serum insulin （INS） level，vaspin level，and homeostasis model of insulin resistance （HOMA-IR） were determined before operation and on week 4，8 after operation，respectively．At the same time，the correlation between vaspin and the indicators （FPG，INS，or HOMA-IR） was analyzed．Results Compared the indicators after operation with before operation，the FPG level，INS level，vaspin level，and HOMA-IR were not significantly different between the T2DM-RYGB group and T2DM-SO group （P＞0.05） or between the RYGB group and SO group （P＞0.05），but the FPG level，INS level，vaspin level，and HOMA-IR in the T2DM-RYGB group and T2DM-SO group were significantly higher than those in the RYGB group （P＜0.05） and SO group （P＜0.05），respectively. On week 4 after operation，the FPG level，INS level，vaspin level，and HOMA-IR decreased in the T2DM-RYGB group，except for the FPG level，the other indexes had no significant differences as compared with the values before operation. On week 8 after operation，the FPG level，INS level，vaspin level，and HOMA-IR further decreased in the T2DM-RYGB group，there were significant differences of these indicators between before operation and on week 8 after operation. Compared the indicators after operation with before operation，the FPG level，INS level，vaspin level，and HOMA-IR were not statistically significant （P＞0.05） in the T2DM-SO group，RYGB group，or SO group. The changes in serum vaspin level correlated positively with those in INS and HOMA-IR before operaion and on week 4，8 after operaion in the T2DM-RYGB group and T2DM SO group rats （P＜0.05），respectively. Conclusions RYGB surgery has a therapeutic effect on T2DM rats，and serum vaspin level decreases and insulin resistance is improved after RYGB surgery，which may be one of the mechanisms of the treatment for T2DM.
The purpose of this study was to find some solutions to the problem of tendon cell proliferation control. Under the condition of in vitro culture, several materials including IGF-1 receptor antibody and mRNA antisense oligonucleotide were added to the culture medium to block the IGF-1-Receptor system. The effect of the material on the tendon cell proliferation was judged by cell count after incubation of 48 hours. The results showed that both IGF-1 Receptor antibody (IGF-1R alpha) and IGF-1 Receptor mRNA antisense oligonucleotide had negative effect on tendon cell proliferation (P lt; 0.01 and P lt; 0.05). These findings lead us to think that the above two materials could be used in the experiment of tendon adhesion preventing and living ready-made tendon producing.
Objective To study the relationship between insulinase activity of erythrocytes(EIA)and diabetic retinopathy(DR)in non insulin dependent diabetes mellitus (NIDDM) patients． Methods EIA,fasting plasma glucose (FPG),fasting plasma insulin (FINS) and glycosylated hemoglobin (HbA1c) were determined in 55 healthy controls,42 NIDDM patients with DR and 44 NIDDM patients without DR． Results EIA was lower,disease duration was longer,and FPG and HbA1c were higher in NIDDA patients with DR.EIA was decreased,duration of NIDDM was lengthened,FPG and HbA1c were increased in NIDDM patients with proliferative DR as compared with NIDDM patients with background DR．The correlation analysis showed,in NIDDM patients with DR,EIA was inversely correlated with FPG,HbA1c and duration of NIDDM． Conclusion Insulinase may play certain role in the onset and development of DR． (Chin J Ocul Fundus Dis,1998,14:132-134)
摘要:目的: 观察格列美脲对2型糖尿病患者心血管的保护作用并探讨其可能的机制。 方法 :112例T2DM患者随机分为格列美脲组(格列美脲+二甲双胍)和对照组(格列本脲+二甲双胍),观察治疗前后两者空腹及餐后两小时血糖(FBG,2hPBG)、糖化血红蛋白(HbA1c)、空腹胰岛素(FINS)、HOMA模型胰岛素抵抗指数(HOMAIR)、甘油三脂(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDLC)、低密度脂蛋白胆固醇(LDLC)、同型半胱氨酸(HCY)、血浆脂联素的变化。 结果 :两组患者的TC、LDLC、TG、FBG、2hPBG都较治疗前降低,连续服用6个月以上格列美脲的T2DM患者其血浆HCY、HOMAIR、血糖水平明显下降,血浆脂联素水平明显升高,与对照组相比差异有统计学意义(〖WTBX〗P lt;005)。 结论 :格列美脲能降低多项心血管危险因子水平,对血脂、HCY和动脉粥样硬化都有良性调节作用,其作用基础可能与改善胰岛素抵抗,增加血浆脂联素相关。Abstract: Objective: To observe the protective effects and to explore mechanisms of glimepiride on cardiovascular system of Type 2 Diabetes Mellitus. Methods : 112 patients with type 2 diabetes mellitus were randomly divided into treatment group (glimepiride combined with metformin) and control group (glibenclamide combined with metformin). The fasting blood glucose (FBG), 2hPBG, hemoglobin A1c (HbA1c), FINS, HOMAIR, blood lipid (TC, TG, LDLC and HDLC), HCY (homocysteine) and adiponectin were detected before and after treatment. Results : In all cases, the level of TC、LDLC、TG、FBG、2hPBG were decreased after treated with glimepiride or glibenclamide combined with metformin for 6 monthes. Moreover, the level of HCY, HOMAIR and blood glucose were decreased and the level of adiponectin was increased significantly than that of in control group (Plt;005). Conclusion : Glimepiride showed the effective on decreasing the risk factor of cardiovascular system disease with regulation of blood lipid, HCY, and improve the atherosclerosis. The effective of glimepiride on cardiovascular system was relation to improved the insulin resistance and increase the adiponectin.
【摘要】目的总结胰岛素泵在糖尿病患者胆囊切除手术中的应用。方法本组42例，随机分为两组，泵治疗组24例、皮下治疗组18例，术前诊断均为糖尿病合并胆囊结石。泵治疗组采用胰岛素泵控制围手术期血糖，皮下治疗组每日3次皮下注射胰岛素控制围手术期血糖。结果全部病例手术过程顺利，泵治疗组术中、术后血糖控制较皮下治疗组血糖控制平稳，尿酮监测均为阴性，伤口全部一期愈合。结论胰岛素泵用于糖尿病患者胆囊切除手术有利于患者顺利渡过围手术期。
Objective To explore the possible anti-inflammatory mechanism of intensive insulin therapy （IIT） by studying the effect of IIT on the levels of TNF-α, IL-6, C-reactive protein （CRP） and APACHE Ⅱ score in biliary pyemia. Methods Twenty eight patients with biliary pyemia who were admitted by our department and given an operation within 24 h form Jan. 2005 to Dec. 2008 were randomly divided into two groups by using random number table numbers: one group treated with IIT （IIT group, n=14） and another group treated with routine insulin therapy （RIT group, n=14）. The inflammatory factors, such as TNF-α, IL-6 and CRP were detected dynamically and the APACHEⅡ score was calculated. ResultsThe level of CRP and APACHEⅡ score on day 5 and 7 and the levels of TNF-α and IL-6 on day 3, 5 and 7 after operation in IIT group were significantly lower than those in RIT group （P＜0.05, P＜0.0１）. Compared with preoperative levels, the IL-6 and APACHEⅡ score in IIT group commenced to decrease on day 3 after operation （P＜0.05）, that was earlier than control group. Conclusion The treatment with IIT can suppress the composition of TNF-α, IL-6 and CRP, protect impaired hepatic cells, and reduce APACHEⅡ score, the degree of systemic inflammation and incidence of MODS.