目的:观察磷酸西格列汀联合阿卡波糖对老年2型糖尿病患者血糖、血脂及葡萄糖转运蛋白4(GLUT4)的影响。方法:86例2型糖尿病老年患者随机分为对照组和观察组,每组43例。两组患者均给予饮食、运动、生活规律等方面的指导,并进行心理及用药...目的:观察磷酸西格列汀联合阿卡波糖对老年2型糖尿病患者血糖、血脂及葡萄糖转运蛋白4(GLUT4)的影响。方法:86例2型糖尿病老年患者随机分为对照组和观察组,每组43例。两组患者均给予饮食、运动、生活规律等方面的指导,并进行心理及用药方面的护理。在此基础上,对照组患者给予阿卡波糖片50 mg/次,每日3次,餐时咀嚼服用;观察组患者给予阿卡波糖片(用法用量同对照组)+磷酸西格列汀片100 mg/次,每日1次,口服。两组疗程均为3个月。比较两组患者治疗前后的空腹血糖(FBG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(Hb Alc)、体质量指数(BMI)、空腹胰岛素(FINs)、胰岛素抵抗指数(HOMA-IR)、胰岛B细胞功能指数(HOMA-B)、总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)等指标,同时记录治疗期间不良反应发生情况。此外,选取43名健康志愿者作为健康对照组,分别比较两组患者治疗前后血清GLUT4水平与健康对照组之间的差别。结果:治疗后,两组患者BMI、FBG、2 h PG、HbA_lc、HOMA-IR、FINs、TC、TG、LDL-C水平显著低于同组治疗前,且观察组显著低于对照组;两组患者HOMA-B、HDL-C水平显著高于同组治疗前,且观察组显著高于对照组,差异均有统计学意义(P<0.05)。治疗前,两组患者血清GLUT4水平显著低于健康对照组,差异有统计学意义(P<0.05)。治疗后,对照组患者血清GLUT4水平与治疗前比较差异无统计学意义(P>0.05),观察组患者血清GLUT4水平显著高于同组治疗前,亦显著高于同期对照组,但仍低于健康对照组,差异均有统计学意义(P<0.05)。两组患者不良反应发生率比较差异无统计学意义(P>0.05)。结论:磷酸西格列汀联合阿卡波糖治疗老年2型糖尿病能有效控制患者的血糖和血脂水平、改善胰岛B细胞的功能、提高血清GLUT4水平,且不增加不良反应的发生,安全性较好。展开更多
In plants, triose phosphate/phosphate translocator (TPT) is the first regulation point forpartitioning of photosynthate between source and sink. Studies on the characteristic of TPT and itsregulation on the distributi...In plants, triose phosphate/phosphate translocator (TPT) is the first regulation point forpartitioning of photosynthate between source and sink. Studies on the characteristic of TPT and itsregulation on the distribution of assimilates are critical for improving the utilization rate of photosyntheticassimilates. Chloroplasts with intactness of more than 91% and high purity were isolated from wheat( Triticurn aestivurn L. cv. Jing 411) leaves. Analysis of SDS-PAGE and labeling with an irreversible specificinhibitor, [H3]2^-DIDS (4, 4'-diisothiocyano-2, 2'-stilbenedisulfonate, DIDS) demonstrated that wheat TPTwas a chloroplast membrane protein with a 35 kD molecular weight, which comprised about 15% of the totalmembrane proteins of chloroplasts. Western blotting analysis showed that wheat TPT is uniquelydistributed in the envelope membrane of chloroplasts, but not detected in the membranes of vacuoles andmitochondria. The silicone-oil-layer centrifugation system was employed to study the kinetic properties ofTPT. The results showed that the maximal transport activity of TPT was the highest for dihydroxyacetonephosphate (DHAP)/inorganic phosphate (Pi), then for phosphoenolpyruvate (PEP)/Pi and glucose-6-phosphate (G6P)/Pi. The Km value of TPT was the lowest for DHAP, followed by Pi, PEP and G6P,therefore the most preferred substrate of TPT is DHAP. The transport of wheat TPT to DHAP was stronglyinhibited by DIDS with a degree of 95%. Inhibition of TPT transport activity led to an obvious accumulationof starch in chloroplasts, therefore the TPT protein of wheat controls the export of TP out of chloroplastsinto cytosol. Except for the need of participating in the Calvin cycle, the ratio of TP exported out ofchloroplast to the one used for synthesizing starch was at least 93.6:6.4. The TPT protein from wheat hasmuch high transport efficiency, which plays an important role in the regulation of the distribution ofassimilates in wheat chloroplasts.展开更多
湘雅医院卫生部肿瘤蛋白质组学重点实验室在肿瘤蛋白质组研究领域取得重大进展，通过对人体血清中成千上万种蛋白质进行筛选，发现肺鳞癌患者血液中特异性存在较高频率的磷酸丙糖异构酶和锰超氧化物歧化酶自身抗体和游离抗原，这两种蛋...湘雅医院卫生部肿瘤蛋白质组学重点实验室在肿瘤蛋白质组研究领域取得重大进展，通过对人体血清中成千上万种蛋白质进行筛选，发现肺鳞癌患者血液中特异性存在较高频率的磷酸丙糖异构酶和锰超氧化物歧化酶自身抗体和游离抗原，这两种蛋白质极有可能成为肺鳞癌的血清标志物，用于指导肺鳞癌的诊断与治疗，具有重要学术价值和临床应用前景。蛋白质组学研究领域的国际顶尖杂志《Journal of Proteome Research》于近日发表了这一处于国际领先水平的重要研究成果。展开更多
文摘目的:观察磷酸西格列汀联合阿卡波糖对老年2型糖尿病患者血糖、血脂及葡萄糖转运蛋白4(GLUT4)的影响。方法:86例2型糖尿病老年患者随机分为对照组和观察组,每组43例。两组患者均给予饮食、运动、生活规律等方面的指导,并进行心理及用药方面的护理。在此基础上,对照组患者给予阿卡波糖片50 mg/次,每日3次,餐时咀嚼服用;观察组患者给予阿卡波糖片(用法用量同对照组)+磷酸西格列汀片100 mg/次,每日1次,口服。两组疗程均为3个月。比较两组患者治疗前后的空腹血糖(FBG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(Hb Alc)、体质量指数(BMI)、空腹胰岛素(FINs)、胰岛素抵抗指数(HOMA-IR)、胰岛B细胞功能指数(HOMA-B)、总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)等指标,同时记录治疗期间不良反应发生情况。此外,选取43名健康志愿者作为健康对照组,分别比较两组患者治疗前后血清GLUT4水平与健康对照组之间的差别。结果:治疗后,两组患者BMI、FBG、2 h PG、HbA_lc、HOMA-IR、FINs、TC、TG、LDL-C水平显著低于同组治疗前,且观察组显著低于对照组;两组患者HOMA-B、HDL-C水平显著高于同组治疗前,且观察组显著高于对照组,差异均有统计学意义(P<0.05)。治疗前,两组患者血清GLUT4水平显著低于健康对照组,差异有统计学意义(P<0.05)。治疗后,对照组患者血清GLUT4水平与治疗前比较差异无统计学意义(P>0.05),观察组患者血清GLUT4水平显著高于同组治疗前,亦显著高于同期对照组,但仍低于健康对照组,差异均有统计学意义(P<0.05)。两组患者不良反应发生率比较差异无统计学意义(P>0.05)。结论:磷酸西格列汀联合阿卡波糖治疗老年2型糖尿病能有效控制患者的血糖和血脂水平、改善胰岛B细胞的功能、提高血清GLUT4水平,且不增加不良反应的发生,安全性较好。
文摘In plants, triose phosphate/phosphate translocator (TPT) is the first regulation point forpartitioning of photosynthate between source and sink. Studies on the characteristic of TPT and itsregulation on the distribution of assimilates are critical for improving the utilization rate of photosyntheticassimilates. Chloroplasts with intactness of more than 91% and high purity were isolated from wheat( Triticurn aestivurn L. cv. Jing 411) leaves. Analysis of SDS-PAGE and labeling with an irreversible specificinhibitor, [H3]2^-DIDS (4, 4'-diisothiocyano-2, 2'-stilbenedisulfonate, DIDS) demonstrated that wheat TPTwas a chloroplast membrane protein with a 35 kD molecular weight, which comprised about 15% of the totalmembrane proteins of chloroplasts. Western blotting analysis showed that wheat TPT is uniquelydistributed in the envelope membrane of chloroplasts, but not detected in the membranes of vacuoles andmitochondria. The silicone-oil-layer centrifugation system was employed to study the kinetic properties ofTPT. The results showed that the maximal transport activity of TPT was the highest for dihydroxyacetonephosphate (DHAP)/inorganic phosphate (Pi), then for phosphoenolpyruvate (PEP)/Pi and glucose-6-phosphate (G6P)/Pi. The Km value of TPT was the lowest for DHAP, followed by Pi, PEP and G6P,therefore the most preferred substrate of TPT is DHAP. The transport of wheat TPT to DHAP was stronglyinhibited by DIDS with a degree of 95%. Inhibition of TPT transport activity led to an obvious accumulationof starch in chloroplasts, therefore the TPT protein of wheat controls the export of TP out of chloroplastsinto cytosol. Except for the need of participating in the Calvin cycle, the ratio of TP exported out ofchloroplast to the one used for synthesizing starch was at least 93.6:6.4. The TPT protein from wheat hasmuch high transport efficiency, which plays an important role in the regulation of the distribution ofassimilates in wheat chloroplasts.
文摘湘雅医院卫生部肿瘤蛋白质组学重点实验室在肿瘤蛋白质组研究领域取得重大进展，通过对人体血清中成千上万种蛋白质进行筛选，发现肺鳞癌患者血液中特异性存在较高频率的磷酸丙糖异构酶和锰超氧化物歧化酶自身抗体和游离抗原，这两种蛋白质极有可能成为肺鳞癌的血清标志物，用于指导肺鳞癌的诊断与治疗，具有重要学术价值和临床应用前景。蛋白质组学研究领域的国际顶尖杂志《Journal of Proteome Research》于近日发表了这一处于国际领先水平的重要研究成果。
