Vitamin A Decreases Cytotoxicity of Oxidized Low-Density Lipoprotein in Patients with Atherosclerosis

Background: Oxidized low-density lipoprotein (ox-LDL) is implicated in initiation and progression of atherosclerosis. Previously, we found that ox-LDL increases vulnerability of peripheral blood mononuclear cells (PBMCs) in atherosclerotic patients compared to controls. Vitamin A induces proliferation of PBMCs. The aim of this study was to determine the effect of vitamin A supplementation on PBMC survival against LDL and different doses of ox-LDL.

Method: In this double-blind placebo-controlled trial, we recruited 35 atherosclerotic patients and 38 healthy controls and randomly allocated them into placebo and vitamin A groups, which received either placebo or 25,000 IU/day of vitamin A for 3 months. PBMCs were isolated, cultured, and stimulated by 1 µg/mL LDL as well as 1 µg/mL and 50 µg/mL ox-LDL. The stimulation indexes (SIs) of PBMCs were calculated to identify cell viability. Additionally, the circulating ox-LDL levels were measured by ELISA.

Results: Viability of PBMCs stimulated by 50 µg/mL ox-LDL significantly increased following vitamin A supplementation in patients (p < 0.01). The levels of circulating ox-LDL were not changed by vitamin A treatment. Ox-LDL levels were strongly and positively correlated to SI of PBMCs stimulated by 1 µg/mL LDL and1 µg/mL ox-LDL in all groups.

Conclusion: Vitamin A decreases cytotoxicity of high-dose ox-LDL and improves PBMC viability. The protective effect of vitamin A is not mediated by an antioxidative mechanism, but may instead have been due to intracellular protection of the apoptotic machinery or induction of proliferation of the cells. Higher levels of ox-LDL increase PBMC irritability in all participants.     

二甲双胍对精神分裂症肥胖患者的体重及糖脂代谢的影响

目的:探讨二甲双胍对精神分裂症肥胖患者的体重及糖脂代谢的影响。方法:将66例精神分裂症肥胖患者随机分成研究组和对照组各33例,研究组给予二甲双胍片0.75g/d,对照组给予安慰剂治疗,疗程6个月。于治疗前及治疗6个月末测定空腹血糖(FBG)、胆固醇(TC)、甘油三脂(TG)、高密度脂蛋白(HDL)及低密度脂蛋白(LDL),测量身高和体重,计算体重指数(BMI)。结果:治疗6个月末两组比较,在BMI、FBG、TC、HDL、LDL 5个指标上差异有统计学意义(t=2.54,6.56,7.03,3.86,3.86;P均0.05),而TG水平差异无统计学意义。结论:二甲双胍能有效改善精神分裂症肥胖患者的体重增加及糖脂代谢紊乱,值得临床应用。     

丙戍酸镁缓释片合并维思通对精神分裂症患者脂代谢影响

目的 分析丙戍酸镁合并维思通治疗对精神分裂症患者脂代谢的影响.方法 200例女性首发精神分裂症患者随机分为研究组与对照组各100例,研究组丙戍酸镁合并维思通治疗,对照组维思通治疗.于治疗前,治疗2、4、6、8、12周采集血样,检测胆固醇（TC）进行比较.结果 研究组治疗各周后胆固醇与治疗前相比脂代谢无明显变化.对照组自第2周即出现明显升高,此后各周持续升高（t=2.23,6.69,11.81,14.74,36.39；P＜0.01）,两组各周比较有显著差异（t=2.74,6.68,11.19,13.82,28.65;P ＜0.01）.结论 丙戍酸镁合并维思通治疗对精神分裂症患者脂代谢影响小,与丙戍酸镁特殊作用机制有关.     

外泌体miR-27a/b与单纯性肥胖儿童胰岛素抵抗、血脂代谢和生长发育的关系

目的 检测循环血外泌体miR-27a、miR-27b表达与单纯性肥胖儿童胰岛素抵抗、血脂代谢和生长发育的关系.方法 共纳入了120例年龄在6～15岁之间在我院儿保科体检的儿童,包括60例诊断为单纯性肥胖者作为肥胖组和60例非肥胖儿童作为正常对照组.进行人体测量(包括身高、体重、腰围等),采集血样,提取血清外泌体,采用实...     

肾脏病患者脂蛋白（a）的异常代谢

本文检测和分析了７３例各类肾脏疾病患者和对照组人群的血脂、载脂蛋白、血清和尿液中Ｌｐ（ａ）水平，表明各类肾小球疾病及慢性肾衰、糖尿病肾病患者具脂质代谢异常，血清高浓度脂蛋白为其另一生代特征。血清脂蛋白同血清白蛋白、尿总蛋白及尿蛋白分子大小均显著相关；尿Ｌｐ（ａ）排泄减少，且同血清肌酐水平相关。     

益生元对2型糖尿病患者糖脂代谢的影响

目的 探讨益生元对2型糖尿病患者血糖血脂代谢的影响,分析益生元在糖尿病进程中的作用。方法 选取2017年1月~2018年3月本院104例2型糖尿病患者,按随机数字表法分为对照组和实验组,每组52例,对照组给予安慰剂,实验组服用益生元,12周后再次检测血液中的血糖血脂生化指标,统计分析服用前后生化指标的变化。结果 实验组服用12周益生元后,患者空腹血糖、餐后2 h血糖、糖化血红蛋白、胆固醇及低密度脂蛋白水平低于治疗前,差异有统计学意义 (P＜0.05)。治疗后实验组糖脂生化指标中空腹血糖、糖化血红蛋白、胆固醇及低密度脂蛋白浓度水平均低于对照组,差异具有统计学意义 (P＜0.05);治疗后两组餐后2 h血糖、甘油三酯、高密度脂蛋白对比,差异无统计学意义（P＞0.05）。结论 补充益生元有助于降低2型糖尿病患者的空腹血糖、糖化血红蛋白、胆固醇及低密度脂蛋白浓度水平,对2型糖尿病患者的血糖及血脂可能具有积极的作用。     

Local Lymphocytes and Nitric Oxide Synthase in the Uterine Cervical Stroma of Patients with Grade III Cervical Intraepithelial Neoplasia

OBJECTIVES:

Precancerous and cancerous cells can trigger an immune response that may limit tumor development and can be used as a prognostic marker. The aims of the present study were to quantify the presence of B and T lymphocytes, macrophages and cells expressing inducible nitric oxide synthase (iNOS) in the cervical stroma of women with grade III cervical intraepithelial neoplasia (CIN III) or in the intratumoral and peritumoral tissue of women with stage I invasive carcinoma.

METHODS:

Cervical tissue specimens were obtained from 60 women (20 each from control tissues, CIN III and invasive carcinomas). The average ages in the control, CIN III and invasive groups were 43.9 (± 4.3), 35.5 (± 9.5), and 50 (± 11.2) years, respectively. The specimens were immunohistochemically labeled with antibodies to identify T lymphocytes (CD3), cytotoxic lymphocytes (CD8), B lymphocytes (CD20), macrophages (CD68) and iNOS. We evaluated the markers in the stroma above the squamocolumnar junction (control), at the intraepithelial lesion (CIN cases), and in the nfiltrating tumor. Two independent observers performed the immunohistochemical analysis.

RESULTS:

T lymphocytes, B lymphocytes, macrophages and iNOS were present more frequently (P<0.05) in the stroma of peritumoral invasive tumors compared to the controls and intratumoral invasive cancer samples. CD3+ and CD20+ lymphocytes were present more frequently in CIN III patients compared to samples from patients with intratumoral invasive cancer (P<0.05).

CONCLUSION:

High numbers of T and B lymphocytes, macrophages and iNOS-expressing cells in the peritumoral stroma of the invasive tumors were observed. Cell migration appeared to be proportional to the progression of the lesion.     

非酒精性脂肪肝患者脂代谢紊乱与血清补体C3的相关性研究

目的:研究血清补体C3与非酒精性脂肪肝发病危险因素及非酒精性脂肪肝发生发展的相关性.进而了解C3在非酒精性脂肪肝患者血清中含量变化的意义.方法:40例健康对照组、40例单纯转氨酶升高组、40例非酒精性脂肪肝转氨酶正常组、40例非酒精性脂肪肝转氨酶升高组.按脂肪肝患者ALT是否升高分为转氨酶正常组和异常组.用酶联免疫吸附...     

葛根芩连汤对2型糖尿病患者糖脂代谢指标及 体重的影响

目的 探究葛根芩连汤对对2型糖尿病患者糖脂代谢指标及体重的影响。方法 选取2017年1月~2019年1月我院收治的2型糖尿病患者60例,采用随机数字表法分为对照组和观察组,各30例。对照组给予口服盐酸二甲双胍片治疗,观察组在对照组基础上联合葛根芩连汤治疗。对比两组治疗前后糖脂代谢指标、体重变化及不良反应发生率。结果 治疗后观察组FPG（6.21±0.74）mmol/L、HbAlc（6.23±0.45）%、TC（3.75±0.52）mmol/L、TG（1.76±0.35）mmol/L、LDL-C（3.03±0.44）mmol/L及BMI指数（24.13±1.82）kg/m2,分别低于对照组的（7.26±0.83）mmol/L、（7.49±0.58）%、（4.88±0.56）mmol/L、（2.62±0.41）mmol/L、（3.69±0.48）mmol/L、（26.56±1.71）kg/m2,差异有统计学意义(P＜0.05);观察组HDL-C（1.55±0.20）mmol/L,高于对照组的（1.36±0.15）mmol/L,差异有统计学意义(P＜0.05);观察组不良反应发生率为6.67%,低于对照组的16.67%,但差异无统计学意义（P＞0.05）。结论 葛根芩连汤治疗有助于更好的改善糖脂代谢各指标水平,控制患者体重,且药物安全性高,利于预后恢复。