AIM: To evaluate the role of leptin in the internal disorders during hepatic ischemia/reperfusion injury. METHODS: A rat model of 70% hepatic ischemia/reperfusion injury was established, with groups of shamoperation (...AIM: To evaluate the role of leptin in the internal disorders during hepatic ischemia/reperfusion injury. METHODS: A rat model of 70% hepatic ischemia/reperfusion injury was established, with groups of shamoperation (Sham), 60 min ischemia/60 min reperfusion (I60'R60'), I60'R150', I60'R240' and I60'R360'. Serum leptin was detected by a self-produced radioimmunoassay; serum glucose, total anti-oxidation capacity, myeloperoxidase, alanine transaminase and diamine oxidase were determined by relevant kits, while histologicalalterations and protein levels of leptin in the lung, liver and duodenum were examined by hematoxylin-eosin staining and immunohistochemistry. Spearman's rank correlation between leptin and other variables or grading of tissue impairment were analyzed simultaneously. RESULTS: Serum leptin in I60'R360' was significantly higher than in Sham and I60'R240' groups (both P < 0.05), serum glucose in I60'R360' was higher than in Sham and I60'R150' (both P < 0.05), and serum total anti-oxidation capacity in I60'R240' and I60'R360' were higher than in Sham (both P < 0.05) and I60'R150' groups (both P < 0.01). Serum myeloperoxidase in groups of I60'R240' and I60'R360' were lower than in I60'R150'group (both P < 0.05), serum alanine transaminase in the four reperfusion groups were higher than in the Sham group (all P < 0.05), while serum DAO in I60'R360' was lower than in I60'R60' (P < 0.05). Histological impairment in the lung, liver and duodenum at the early phase of this injury was more serious, but the impairment at the later phase was lessened gradually. Protein levels of leptin in the lung in the four reperfusion groups were significantly lower than in the Sham group (all P < 0.01), decreasing in the order of I60'R150', I60' R60', I60'R360' and I60'R240'; the levels in the liver in I60'R60' and I60'R240' were higher than in the Sham group (both P < 0.01), while the levels in I60'R240' and I60'R360' were lower than in I60'R60' (both P < 0.01); the levels in duodenum in I60'R240' and I60'R360' were higher than in Sham, I60'R60' and I60'R150' (all P < 0.01), while the level in I60'R150' was lower than in I60' R60' (P < 0.05). There was a significantly positive correlation between serum leptin and alanine transaminase (ρ = 0.344, P = 0.021), a significantly negative correlation between the protein level of leptin in the lung and its damage scores (ρ = -0.313, P = 0.036), and a significantly positive correlation between the protein level of leptin in the liver and its damage scores (ρ = 0.297, P = 0.047). CONCLUSION: Endogenous leptin fluctuates in he-patic ischemia/reperfusion injury, exerts a potency to rehabilitate the internal disorders and represents a potential target for supportive therapy.展开更多
目的:观察长时间高原训练过程中运动员免疫机能和血清瘦素的变化,探讨二者之间的关系。方法:20名优秀男子赛艇运动员进行持续60天的高原训练(海拔2200 m),训练分为两个大的训练阶段,7天为1个训练周,每个训练周包含2个小周期。内容以中...目的:观察长时间高原训练过程中运动员免疫机能和血清瘦素的变化,探讨二者之间的关系。方法:20名优秀男子赛艇运动员进行持续60天的高原训练(海拔2200 m),训练分为两个大的训练阶段,7天为1个训练周,每个训练周包含2个小周期。内容以中低强度有氧耐力训练为主。上高原后第1、4、10、25、38、60天,即每个训练小周期、训练周或大训练阶段调整结束后次日清晨,空腹采集前臂静脉血。酶联免疫吸附法测定血清瘦素,化学发光仪测定血清皮质醇,以Beckman COULTER AC T10血球仪测定白细胞及其分类计数,以Binding Site AD200光散射光度计测定免疫球蛋白。结果:(1)与上高原前的(6.55±1.31)×109/L比较,WBC计数在上高原后1天[(5.62±2.26)×109/L]下降14.2%,高原第10天为(6.51±0.97)×109/L,回升至接近高原前水平;高原第25天为(5.24±0.82)×109/L,与高原前、高原第10天比较显著下降(P<0.05)。(2)LY%与WBC计数变化趋势近似,高原第25天[(29.37±5.88)]%大幅下降,与高原前的(40.43±6.64)%和高原第10天的(36.62±6.94)%比较有显著性差异(P<0.05);高原训练第38天、第60天LY%分别为(32.49±4.92)%、(28.18±3.71)%,均显著低于高原前。(3)上高原1天后,血清IgG[(12.11±2.18)g/L]显著升高(P<0.05);之后,IgG无明显变化;血清IgM和IgA高原训练阶段与高原前比较均无显著改变。(4)整个高原训练过程中,血清LP均值无显著性改变(变化范围6.12～6.56 ng/ml)。结论:高原训练第25天左右,免疫机能可能下降;经10天调整训练后略有恢复,至上高原后第60天仍低于高原前。长时间高原训练过程中,血清LP与免疫机能之间的变化关系仍需研究。展开更多
基金Supported by National Natural Science Foundation of China, No. 30670821National Key Technology R&D Program, No. 2006BAF07B01+1 种基金Special Funds for Key Program of Public Welfare of National Ministry of Science and Technology, No. 2002D1A40019Nursery Fund of Chinese PLA General Hospital, No. 06MP83
文摘AIM: To evaluate the role of leptin in the internal disorders during hepatic ischemia/reperfusion injury. METHODS: A rat model of 70% hepatic ischemia/reperfusion injury was established, with groups of shamoperation (Sham), 60 min ischemia/60 min reperfusion (I60'R60'), I60'R150', I60'R240' and I60'R360'. Serum leptin was detected by a self-produced radioimmunoassay; serum glucose, total anti-oxidation capacity, myeloperoxidase, alanine transaminase and diamine oxidase were determined by relevant kits, while histologicalalterations and protein levels of leptin in the lung, liver and duodenum were examined by hematoxylin-eosin staining and immunohistochemistry. Spearman's rank correlation between leptin and other variables or grading of tissue impairment were analyzed simultaneously. RESULTS: Serum leptin in I60'R360' was significantly higher than in Sham and I60'R240' groups (both P < 0.05), serum glucose in I60'R360' was higher than in Sham and I60'R150' (both P < 0.05), and serum total anti-oxidation capacity in I60'R240' and I60'R360' were higher than in Sham (both P < 0.05) and I60'R150' groups (both P < 0.01). Serum myeloperoxidase in groups of I60'R240' and I60'R360' were lower than in I60'R150'group (both P < 0.05), serum alanine transaminase in the four reperfusion groups were higher than in the Sham group (all P < 0.05), while serum DAO in I60'R360' was lower than in I60'R60' (P < 0.05). Histological impairment in the lung, liver and duodenum at the early phase of this injury was more serious, but the impairment at the later phase was lessened gradually. Protein levels of leptin in the lung in the four reperfusion groups were significantly lower than in the Sham group (all P < 0.01), decreasing in the order of I60'R150', I60' R60', I60'R360' and I60'R240'; the levels in the liver in I60'R60' and I60'R240' were higher than in the Sham group (both P < 0.01), while the levels in I60'R240' and I60'R360' were lower than in I60'R60' (both P < 0.01); the levels in duodenum in I60'R240' and I60'R360' were higher than in Sham, I60'R60' and I60'R150' (all P < 0.01), while the level in I60'R150' was lower than in I60' R60' (P < 0.05). There was a significantly positive correlation between serum leptin and alanine transaminase (ρ = 0.344, P = 0.021), a significantly negative correlation between the protein level of leptin in the lung and its damage scores (ρ = -0.313, P = 0.036), and a significantly positive correlation between the protein level of leptin in the liver and its damage scores (ρ = 0.297, P = 0.047). CONCLUSION: Endogenous leptin fluctuates in he-patic ischemia/reperfusion injury, exerts a potency to rehabilitate the internal disorders and represents a potential target for supportive therapy.
文摘目的:探讨瘦素(leptin)基因启动子区-2548G/A功能多态性是否与首次抗精神病药物(antipsychotic agents,APS)治疗精神分裂症(schizophrenia,SCH)患者急性期体质量增加相关。方法:APS(利培酮或氯丙嗪)单药治疗10周,治疗前后测量体质量并计算体质量指数(body mass index,BMI)。采用PCR-RFLP技术分析84例首次治疗精神分裂症患者(包含完整核心家系70个)瘦素基因-2548 G/A基因型和等位基因分布频率,APS治疗所致体质量增加与瘦素-2548G/A多态性的关联分析及核心家系关联分析,采用传递不平衡检验(TDT)和数量性状传递不平衡检验(QTDT)。结果:治疗后患者体质量增加是基础体质量的(8.00±6.13)%。体质量增加≥7%和<7%患者组间瘦素基因-2548G/A多态性的等位基因在两组的分布差异有统计学意义(χ2=4.031,P=0.045)。核心家系分析采用TDT发现,在体质量增加≥7%组患者组存在传递不平衡,等位基因A更多的由杂合子父母传递给体质量增加≥7%的患者。结论:瘦素基因启动子区-2548G/A功能多态性与APS急性期治疗致精神分裂症患者体质量增加相关,-2548A等位基因可能是APS治疗所致肥胖的危险因素。
文摘目的:观察长时间高原训练过程中运动员免疫机能和血清瘦素的变化,探讨二者之间的关系。方法:20名优秀男子赛艇运动员进行持续60天的高原训练(海拔2200 m),训练分为两个大的训练阶段,7天为1个训练周,每个训练周包含2个小周期。内容以中低强度有氧耐力训练为主。上高原后第1、4、10、25、38、60天,即每个训练小周期、训练周或大训练阶段调整结束后次日清晨,空腹采集前臂静脉血。酶联免疫吸附法测定血清瘦素,化学发光仪测定血清皮质醇,以Beckman COULTER AC T10血球仪测定白细胞及其分类计数,以Binding Site AD200光散射光度计测定免疫球蛋白。结果:(1)与上高原前的(6.55±1.31)×109/L比较,WBC计数在上高原后1天[(5.62±2.26)×109/L]下降14.2%,高原第10天为(6.51±0.97)×109/L,回升至接近高原前水平;高原第25天为(5.24±0.82)×109/L,与高原前、高原第10天比较显著下降(P<0.05)。(2)LY%与WBC计数变化趋势近似,高原第25天[(29.37±5.88)]%大幅下降,与高原前的(40.43±6.64)%和高原第10天的(36.62±6.94)%比较有显著性差异(P<0.05);高原训练第38天、第60天LY%分别为(32.49±4.92)%、(28.18±3.71)%,均显著低于高原前。(3)上高原1天后,血清IgG[(12.11±2.18)g/L]显著升高(P<0.05);之后,IgG无明显变化;血清IgM和IgA高原训练阶段与高原前比较均无显著改变。(4)整个高原训练过程中,血清LP均值无显著性改变(变化范围6.12～6.56 ng/ml)。结论:高原训练第25天左右,免疫机能可能下降;经10天调整训练后略有恢复,至上高原后第60天仍低于高原前。长时间高原训练过程中,血清LP与免疫机能之间的变化关系仍需研究。
