Objective: To investigate the changes in glucose transporter-4(Glut-4) mRNA expression in skeletal muscle before and after the thoracic operation and to observe the changes in Glut-4 mRNA expression by preoperative in...Objective: To investigate the changes in glucose transporter-4(Glut-4) mRNA expression in skeletal muscle before and after the thoracic operation and to observe the changes in Glut-4 mRNA expression by preoperative infusion of glucose. Methods: Twelve cases of elective thoracic operation were randomly divided into two groups, namely ordinary group Ⅰ and glucose infusion group Ⅱ. One gram of intercostal muscle was taken while thorax being opened and closed from patients under general anesthesia. Total RNA of the muscle cells was extracted by TRIzol one-step assay. Reverse transcription-competitive polymerase chain reaction (RT-PCR) was used to determine the Glut-4 mRNA amplification products with β-actin mRNA as an internal control. The Glut-4 mRNA expression was expressed by targeted gene /β-actin ×100%. The plasma glucose and insulin levels were determined at the same time.Results: Glut-4 mRNA expression was significantly reduced(P<0.05) and plasma glucose level increased (P<0.05), while thorax was being closed as compared with those while being opened. However, Glut-4 mRNA expression in glucose infusion group Ⅱ was significantly higher than ordinary group Ⅰ (P<0.01) and plasma glucose level in group Ⅱ was lower than group Ⅰ(P<0.05) when thorax was being closed. Conclusion: The results indicate that the synthesis of Glut-4 is suppressed by the surgical stress of thoracic operation under general anesthesia. We found that preoperative infusion glucose can increase Glut-4 mRNA expression at the same surgical stress and relieve postoperative insulin resistance.展开更多
Caveolae and non-caveolar lipid rafts are two types of membrane lipid microdomains that play important roles in insulin-stimulated glucose uptake in adipocytes. In order to ascertain their specific functions in this p...Caveolae and non-caveolar lipid rafts are two types of membrane lipid microdomains that play important roles in insulin-stimulated glucose uptake in adipocytes. In order to ascertain their specific functions in this process, caveolae were ablated by caveolin-1 RNA interference. In Cav-1 RNAi adipocytes, neither insulin-stimulated glucose uptake nor Glut-4 （glucose transporter 4） translocation to membrane lipid microdomains was affected by the ablation of caveolae. With a modified sucrose density gradient, caveolae and non-caveolar lipid rafts could be separated. In the wild-type 3T3- L l adipocytes, Glut-4 was found to be translocated into both caveolae and non-caveolar lipid rafts. However, in Cav1 RNAi adipocytes, Glut-4 was localized predominantly in non-caveolar lipid rafts. After the removal of insulin, caveolaelocalized Glut-4 was internalized faster than non-caveolar lipid raft-associated Glut-4. The internalization of Glut-4 from plasma membrane was significantly decreased in Cav-1 RNAi adipocytes. These results suggest that insulin-stimulated Glut-4 translocation and glucose uptake are caveolae-independent events. Caveolae play a role in the internalization of Glut-4 from plasma membrane after the removal of insulin.展开更多
目的探讨M RP 1/CD 9在膀胱癌组织的表达及其临床意义。方法用免疫组化SP法检测M RP 1/CD 9在膀胱癌组织和正常膀胱黏膜组织中的表达。结果正常膀胱组织中M RP 1/CD 9均为阳性。膀胱癌组织中M RP 1/CD 9表达降低,且与病理分期呈负相关,...目的探讨M RP 1/CD 9在膀胱癌组织的表达及其临床意义。方法用免疫组化SP法检测M RP 1/CD 9在膀胱癌组织和正常膀胱黏膜组织中的表达。结果正常膀胱组织中M RP 1/CD 9均为阳性。膀胱癌组织中M RP 1/CD 9表达降低,且与病理分期呈负相关,与临床分期无相关性。结论在膀胱癌组织中M RP 1/CD 9表达降低,可能与膀胱癌的发展有关。其降低程度可以作为评估膀胱癌恶性程度的一个重要指标。展开更多
Objective To observe the efficacy of knee-balancing manipulation plus heat-sensitive moxibustion in treating knee osteoarthritis(KOA)and its impact on the expression of C-telopeptide of type I collagen(CTX-Ⅰ),tartrat...Objective To observe the efficacy of knee-balancing manipulation plus heat-sensitive moxibustion in treating knee osteoarthritis(KOA)and its impact on the expression of C-telopeptide of type I collagen(CTX-Ⅰ),tartrate-resistant acid phosphatase 5b(TRACP-5b),A disintegrin and metalloproteinase with thrombospondin motifs 4(ADAMTS-4),and matrix metalloproteinase 3(MMP-3).Methods A total of 134 unilateral KOA patients were randomized into a knee-balancing group,a heat-sensitive moxibustion group,and a joint intervention group.The knee-balancing group received knee-balancing Tuina(Chinese therapeutic massage)manipulation for treatment.The heat-sensitive moxibustion group received heat-sensitive moxibustion treatment.The joint intervention group received the heat-sensitive moxibustion in addition to the knee-balancing manipulation.The intervention period lasted for four weeks.After the treatment,and at the 2-week and 6-week follow-ups,the three groups were assessed using the visual analog scale(VAS)for knee joint pain and Western Ontario and McMaster Universities arthritis index(WOMAC),and clinical efficacy was also evaluated.The enzyme-linked immunosorbent assay was adopted to detect the expression levels of serum CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3.Results The knee-balancing group had 44 participants,but one dropped out;there was no dropout case among the 44 participants in the heat-sensitive moxibustion group;among the 46 participants in the joint intervention group,two cases dropped out.After the treatment,and at the 2-week and 6-week follow-ups,the total effective rate was found higher in the joint intervention group than in the knee-balancing and heat-sensitive moxibustion groups(P<0.05).Compared with the baseline,the VAS and WOMAC scores and the serum levels of CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3 decreased significantly in all three groups after treatment and at the 2-week and 6-week follow-ups(P<0.05).At the same three time points,the VAS and WOMAC scores and serum levels of CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3 were lower in the joint intervention group than in the knee-balancing and heat-sensitive moxibustion groups(P<0.001).Conclusion Either used alone or combined,the knee-balancing manipulation and heat-sensitive moxibustion therapy can improve the symptoms and down-regulate the serum levels of CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3 in KOA patients,producing durable efficacy;nevertheless,a more significant efficacy can be achieved by combining the two methods.展开更多
目的探讨复方甘草酸苷对乙型肝炎模型大鼠血清肝炎相关因子的影响。方法 60只成年健康雄性大鼠,随机分为6组,正常组、模型组、对照组、低、中、高3个剂量实验组,每组10只。正常组与模型组每日灌服等体积的生理盐水3m L,实验组每天灌服3...目的探讨复方甘草酸苷对乙型肝炎模型大鼠血清肝炎相关因子的影响。方法 60只成年健康雄性大鼠,随机分为6组,正常组、模型组、对照组、低、中、高3个剂量实验组,每组10只。正常组与模型组每日灌服等体积的生理盐水3m L,实验组每天灌服3个浓度(10,20,30 mg·kg-1)复方甘草酸苷悬浊液3 m L,对照组组每天灌胃23.3 mg·m L-1拉米夫定溶液3 m L。干预结束后,抽取静脉血3 m L,PCR法检测肝组织中的CD4+T淋巴细胞基因表达,流式细胞法检测T淋巴细胞亚群及激活素a(ACT-a)水平,放免法检测肿瘤因子水平。结果与对照组相比,高、中2个剂量实验组CD4+及CD8+T淋巴细胞亚群水平明显降低,ACT-a及肿瘤坏死因子α(TNF-α)水平也明显降低(均P<0.05)。结论复方甘草酸苷能够明显抑制肿瘤因子的合成,并降低ACT-a的水平,改善CD4+及CD8+T淋巴细胞水平。展开更多
文摘Objective: To investigate the changes in glucose transporter-4(Glut-4) mRNA expression in skeletal muscle before and after the thoracic operation and to observe the changes in Glut-4 mRNA expression by preoperative infusion of glucose. Methods: Twelve cases of elective thoracic operation were randomly divided into two groups, namely ordinary group Ⅰ and glucose infusion group Ⅱ. One gram of intercostal muscle was taken while thorax being opened and closed from patients under general anesthesia. Total RNA of the muscle cells was extracted by TRIzol one-step assay. Reverse transcription-competitive polymerase chain reaction (RT-PCR) was used to determine the Glut-4 mRNA amplification products with β-actin mRNA as an internal control. The Glut-4 mRNA expression was expressed by targeted gene /β-actin ×100%. The plasma glucose and insulin levels were determined at the same time.Results: Glut-4 mRNA expression was significantly reduced(P<0.05) and plasma glucose level increased (P<0.05), while thorax was being closed as compared with those while being opened. However, Glut-4 mRNA expression in glucose infusion group Ⅱ was significantly higher than ordinary group Ⅰ (P<0.01) and plasma glucose level in group Ⅱ was lower than group Ⅰ(P<0.05) when thorax was being closed. Conclusion: The results indicate that the synthesis of Glut-4 is suppressed by the surgical stress of thoracic operation under general anesthesia. We found that preoperative infusion glucose can increase Glut-4 mRNA expression at the same surgical stress and relieve postoperative insulin resistance.
文摘Caveolae and non-caveolar lipid rafts are two types of membrane lipid microdomains that play important roles in insulin-stimulated glucose uptake in adipocytes. In order to ascertain their specific functions in this process, caveolae were ablated by caveolin-1 RNA interference. In Cav-1 RNAi adipocytes, neither insulin-stimulated glucose uptake nor Glut-4 （glucose transporter 4） translocation to membrane lipid microdomains was affected by the ablation of caveolae. With a modified sucrose density gradient, caveolae and non-caveolar lipid rafts could be separated. In the wild-type 3T3- L l adipocytes, Glut-4 was found to be translocated into both caveolae and non-caveolar lipid rafts. However, in Cav1 RNAi adipocytes, Glut-4 was localized predominantly in non-caveolar lipid rafts. After the removal of insulin, caveolaelocalized Glut-4 was internalized faster than non-caveolar lipid raft-associated Glut-4. The internalization of Glut-4 from plasma membrane was significantly decreased in Cav-1 RNAi adipocytes. These results suggest that insulin-stimulated Glut-4 translocation and glucose uptake are caveolae-independent events. Caveolae play a role in the internalization of Glut-4 from plasma membrane after the removal of insulin.
文摘目的探讨M RP 1/CD 9在膀胱癌组织的表达及其临床意义。方法用免疫组化SP法检测M RP 1/CD 9在膀胱癌组织和正常膀胱黏膜组织中的表达。结果正常膀胱组织中M RP 1/CD 9均为阳性。膀胱癌组织中M RP 1/CD 9表达降低,且与病理分期呈负相关,与临床分期无相关性。结论在膀胱癌组织中M RP 1/CD 9表达降低,可能与膀胱癌的发展有关。其降低程度可以作为评估膀胱癌恶性程度的一个重要指标。
文摘Objective To observe the efficacy of knee-balancing manipulation plus heat-sensitive moxibustion in treating knee osteoarthritis(KOA)and its impact on the expression of C-telopeptide of type I collagen(CTX-Ⅰ),tartrate-resistant acid phosphatase 5b(TRACP-5b),A disintegrin and metalloproteinase with thrombospondin motifs 4(ADAMTS-4),and matrix metalloproteinase 3(MMP-3).Methods A total of 134 unilateral KOA patients were randomized into a knee-balancing group,a heat-sensitive moxibustion group,and a joint intervention group.The knee-balancing group received knee-balancing Tuina(Chinese therapeutic massage)manipulation for treatment.The heat-sensitive moxibustion group received heat-sensitive moxibustion treatment.The joint intervention group received the heat-sensitive moxibustion in addition to the knee-balancing manipulation.The intervention period lasted for four weeks.After the treatment,and at the 2-week and 6-week follow-ups,the three groups were assessed using the visual analog scale(VAS)for knee joint pain and Western Ontario and McMaster Universities arthritis index(WOMAC),and clinical efficacy was also evaluated.The enzyme-linked immunosorbent assay was adopted to detect the expression levels of serum CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3.Results The knee-balancing group had 44 participants,but one dropped out;there was no dropout case among the 44 participants in the heat-sensitive moxibustion group;among the 46 participants in the joint intervention group,two cases dropped out.After the treatment,and at the 2-week and 6-week follow-ups,the total effective rate was found higher in the joint intervention group than in the knee-balancing and heat-sensitive moxibustion groups(P<0.05).Compared with the baseline,the VAS and WOMAC scores and the serum levels of CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3 decreased significantly in all three groups after treatment and at the 2-week and 6-week follow-ups(P<0.05).At the same three time points,the VAS and WOMAC scores and serum levels of CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3 were lower in the joint intervention group than in the knee-balancing and heat-sensitive moxibustion groups(P<0.001).Conclusion Either used alone or combined,the knee-balancing manipulation and heat-sensitive moxibustion therapy can improve the symptoms and down-regulate the serum levels of CTX-Ⅰ,TRACP-5b,ADAMTS-4,and MMP-3 in KOA patients,producing durable efficacy;nevertheless,a more significant efficacy can be achieved by combining the two methods.
文摘目的探讨复方甘草酸苷对乙型肝炎模型大鼠血清肝炎相关因子的影响。方法 60只成年健康雄性大鼠,随机分为6组,正常组、模型组、对照组、低、中、高3个剂量实验组,每组10只。正常组与模型组每日灌服等体积的生理盐水3m L,实验组每天灌服3个浓度(10,20,30 mg·kg-1)复方甘草酸苷悬浊液3 m L,对照组组每天灌胃23.3 mg·m L-1拉米夫定溶液3 m L。干预结束后,抽取静脉血3 m L,PCR法检测肝组织中的CD4+T淋巴细胞基因表达,流式细胞法检测T淋巴细胞亚群及激活素a(ACT-a)水平,放免法检测肿瘤因子水平。结果与对照组相比,高、中2个剂量实验组CD4+及CD8+T淋巴细胞亚群水平明显降低,ACT-a及肿瘤坏死因子α(TNF-α)水平也明显降低(均P<0.05)。结论复方甘草酸苷能够明显抑制肿瘤因子的合成,并降低ACT-a的水平,改善CD4+及CD8+T淋巴细胞水平。
