目的:研究低氧状态下自噬对2型糖尿病(Diabetes mellitus type 2, T2DM)合并股骨骨折大鼠模型不同时间点的骨折愈合程度及低氧诱导因子-1α (HIF-1α)、碱性磷酸酶(alkaline phosphatase, ALP)、Runt-相关转录因子-2 (Runx2)、微管相关...目的:研究低氧状态下自噬对2型糖尿病(Diabetes mellitus type 2, T2DM)合并股骨骨折大鼠模型不同时间点的骨折愈合程度及低氧诱导因子-1α (HIF-1α)、碱性磷酸酶(alkaline phosphatase, ALP)、Runt-相关转录因子-2 (Runx2)、微管相关蛋白1A/1B-轻链3 (LC3II/I)表达情况。方法:大鼠随机分为高糖高脂饲养前(Control)组、高糖高脂饲养8周后(HFD)组及T2DM模型(T2DM)组,采用高糖髙脂饲料联合链脲佐菌素制备T2DM模型,在T2DM模型基础上制作股骨骨折模型。实验大鼠分为对照组(T2DM合并股骨骨折模型组,Model)及治疗组(氯化钴(CoCl2)治疗的T2DM合并股骨骨折模型组,Treatment),根据检测时间点每组继续分为造模后7 d、28 d、42 d的三个亚组。X线评估股骨愈合情况,WB检测HIF-1α、ALP、Runx2、LC3II/I表达。结果:T2DM合并股骨骨折模型随时间的增长,治疗组在第28 d相比于对照组已有较好的恢复,骨组织中ALP、Runx2表达增加,自噬蛋白LC3II/I的检测结果显示随时间增长自噬水平有所减弱。结论:低氧可以诱导自噬来促进T2DM大鼠骨折愈合。Objective: To investigate fracture healing and hypoxia-inducible factor-1α (HIF-1α), alkaline phosphatase (ALP), runt-related transcription factor 2 (Runx2), and microtubule associated protein-II/I (LC3II/I) expression at different time points in T2DM rats with femoral fracture under hypoxic conditions. Methods: The rats were randomly divided into high-sugar and high-fat pre-feeding groups, high-sugar and high-fat feeding groups after 8 weeks of feeding and a T2DM model group, T2DM was prepared with high-glucose and high-fat diet combined with streptavidin. Femoral fractures were modeled on the basis of T2DM. Experimental rats were divided into a control group (T2DM with femoral fracture model group, Model) and a treatment group (CoCl2 treatment group, Treatment) and continued to be divided into three subgroups on days 7, 28, and 42 post-molecularization for each group at the time of measurement. Femoral healing was assessed by X-ray. HIF-1α, ALP, Runx2, and LC3II/I expression was measured by Western blotting. Result: In the T2DM combined femoral fracture model, as time progresses, the treatment group shows better recovery compared to the control group at day 28. The expression of ALP and Runx2 in bone tissue increases, and the detection results of autophagy protein LC3II/I indicate that autophagy levels weaken over time. Conclusion: Hypoxia can induce autophagy to promote fracture healing in T2DM rats.展开更多
Minocycline has been widely used in clinical treatment and its residues were considered to have environmental safety risks due to complex chemical structure.Therefore,it is necessary to find an efficient and environme...Minocycline has been widely used in clinical treatment and its residues were considered to have environmental safety risks due to complex chemical structure.Therefore,it is necessary to find an efficient and environmentally friendly method to remove minocycline from the environment.This study screened and isolated a minocycline degrading strain DM13 from the activated sludge for municipal sewage pipeline,and optimized the biodegradation of minocycline by DM13 under various environmental conditions.The maximum biodegradation efficiency of 50 mg/L minocycline reached 93%at 72 h with the temperature of 30℃,the initial pH of 7.0,and the inoculation rate of 3%.Two potential biotransformation pathways were proposed,including deamination,demethylation,and decarbonylation.The acute toxicity assessment showed that the biotransformation products of minocycline had lower toxicity than the parent compound.In addition,the first-generation tetracycline antibiotics could be removed,suggesting that strain DM13 has the potential for application in treating antibiotic wastewater.展开更多
目的分析基于TLR4/MyD88/NF-κB信号通路探讨梓醇对T2DM大鼠肾损伤的保护作用。方法选择SPF级雄性SD大鼠50只,造模过程中有10只大鼠造模失败,采用随机数表法将大鼠分为正常组(control,10只)和模型组、西药组、梓醇组四组,每组各10只。...目的分析基于TLR4/MyD88/NF-κB信号通路探讨梓醇对T2DM大鼠肾损伤的保护作用。方法选择SPF级雄性SD大鼠50只,造模过程中有10只大鼠造模失败,采用随机数表法将大鼠分为正常组(control,10只)和模型组、西药组、梓醇组四组,每组各10只。比较各组大鼠干预前后空腹血糖、肾功能指标以及TLR4、MyD88、NF-κB蛋白表达量。结果干预4周后,模型组和西药组、梓醇组FPG、FINS、HOMA-IR水平比较,差异均具有统计学意义(P<0.05);模型组、西药组和梓醇组FPG、FINS、HOMAIR均高于正常组,差异均具有统计学意义(P<0.05);西药组和梓醇组FPG、FINS、HOMAIR低于模型组,差异具有统计学意义(P<0.05);且梓醇组FPG、FINS、HOMAIR低于西药组,差异均具有统计学意义(P<0.05);干预4周后,模型组和西药组、梓醇组BUN、Scr及24 h mALB水平比较,差异均具有统计学意义(P<0.05);模型组、西药组和梓醇组BUN、Scr及24 h mALB均高于正常组,差异均具有统计学意义(P<0.05);西药组和梓醇组BUN、Scr及24 h mALB低于模型组,差异具有统计学意义(P<0.05);且梓醇组BUN、Scr及24 h mALB低于西药组,差异均具有统计学意义(P<0.05);模型组与正常组相比,大鼠肾组织TLR4、MyD88、NF-κB的表达明显上调;与模型组相比,西药组、梓醇组的肾组织TLR4、MyD88、NF-κB的表达明显下调。模型组、西药组、梓醇组TLR4、MyD88、NF-κB的mRNA相对表达量均明显高于正常组,且西药组、梓醇组TLR4、MyD88、NF-κB的mRNA相对表达量明显低于模型组,差异具有统计学意义(P<0.05);梓醇组TLR4、MyD88、NF-κB的mRNA相对表达量低于西药组,差异具有统计学意义(P<0.05)。结论梓醇对2型糖尿病大鼠肾损伤有一定保护作用,可能与抑制TLR4/MyD88/NF-κB信号通路异常激活有关。展开更多
文摘目的:研究低氧状态下自噬对2型糖尿病(Diabetes mellitus type 2, T2DM)合并股骨骨折大鼠模型不同时间点的骨折愈合程度及低氧诱导因子-1α (HIF-1α)、碱性磷酸酶(alkaline phosphatase, ALP)、Runt-相关转录因子-2 (Runx2)、微管相关蛋白1A/1B-轻链3 (LC3II/I)表达情况。方法:大鼠随机分为高糖高脂饲养前(Control)组、高糖高脂饲养8周后(HFD)组及T2DM模型(T2DM)组,采用高糖髙脂饲料联合链脲佐菌素制备T2DM模型,在T2DM模型基础上制作股骨骨折模型。实验大鼠分为对照组(T2DM合并股骨骨折模型组,Model)及治疗组(氯化钴(CoCl2)治疗的T2DM合并股骨骨折模型组,Treatment),根据检测时间点每组继续分为造模后7 d、28 d、42 d的三个亚组。X线评估股骨愈合情况,WB检测HIF-1α、ALP、Runx2、LC3II/I表达。结果:T2DM合并股骨骨折模型随时间的增长,治疗组在第28 d相比于对照组已有较好的恢复,骨组织中ALP、Runx2表达增加,自噬蛋白LC3II/I的检测结果显示随时间增长自噬水平有所减弱。结论:低氧可以诱导自噬来促进T2DM大鼠骨折愈合。Objective: To investigate fracture healing and hypoxia-inducible factor-1α (HIF-1α), alkaline phosphatase (ALP), runt-related transcription factor 2 (Runx2), and microtubule associated protein-II/I (LC3II/I) expression at different time points in T2DM rats with femoral fracture under hypoxic conditions. Methods: The rats were randomly divided into high-sugar and high-fat pre-feeding groups, high-sugar and high-fat feeding groups after 8 weeks of feeding and a T2DM model group, T2DM was prepared with high-glucose and high-fat diet combined with streptavidin. Femoral fractures were modeled on the basis of T2DM. Experimental rats were divided into a control group (T2DM with femoral fracture model group, Model) and a treatment group (CoCl2 treatment group, Treatment) and continued to be divided into three subgroups on days 7, 28, and 42 post-molecularization for each group at the time of measurement. Femoral healing was assessed by X-ray. HIF-1α, ALP, Runx2, and LC3II/I expression was measured by Western blotting. Result: In the T2DM combined femoral fracture model, as time progresses, the treatment group shows better recovery compared to the control group at day 28. The expression of ALP and Runx2 in bone tissue increases, and the detection results of autophagy protein LC3II/I indicate that autophagy levels weaken over time. Conclusion: Hypoxia can induce autophagy to promote fracture healing in T2DM rats.
基金supported by the Natural Science Basic Research Program of Shaanxi Province(No.2023-JC-JQ-36).
文摘Minocycline has been widely used in clinical treatment and its residues were considered to have environmental safety risks due to complex chemical structure.Therefore,it is necessary to find an efficient and environmentally friendly method to remove minocycline from the environment.This study screened and isolated a minocycline degrading strain DM13 from the activated sludge for municipal sewage pipeline,and optimized the biodegradation of minocycline by DM13 under various environmental conditions.The maximum biodegradation efficiency of 50 mg/L minocycline reached 93%at 72 h with the temperature of 30℃,the initial pH of 7.0,and the inoculation rate of 3%.Two potential biotransformation pathways were proposed,including deamination,demethylation,and decarbonylation.The acute toxicity assessment showed that the biotransformation products of minocycline had lower toxicity than the parent compound.In addition,the first-generation tetracycline antibiotics could be removed,suggesting that strain DM13 has the potential for application in treating antibiotic wastewater.
文摘目的分析基于TLR4/MyD88/NF-κB信号通路探讨梓醇对T2DM大鼠肾损伤的保护作用。方法选择SPF级雄性SD大鼠50只,造模过程中有10只大鼠造模失败,采用随机数表法将大鼠分为正常组(control,10只)和模型组、西药组、梓醇组四组,每组各10只。比较各组大鼠干预前后空腹血糖、肾功能指标以及TLR4、MyD88、NF-κB蛋白表达量。结果干预4周后,模型组和西药组、梓醇组FPG、FINS、HOMA-IR水平比较,差异均具有统计学意义(P<0.05);模型组、西药组和梓醇组FPG、FINS、HOMAIR均高于正常组,差异均具有统计学意义(P<0.05);西药组和梓醇组FPG、FINS、HOMAIR低于模型组,差异具有统计学意义(P<0.05);且梓醇组FPG、FINS、HOMAIR低于西药组,差异均具有统计学意义(P<0.05);干预4周后,模型组和西药组、梓醇组BUN、Scr及24 h mALB水平比较,差异均具有统计学意义(P<0.05);模型组、西药组和梓醇组BUN、Scr及24 h mALB均高于正常组,差异均具有统计学意义(P<0.05);西药组和梓醇组BUN、Scr及24 h mALB低于模型组,差异具有统计学意义(P<0.05);且梓醇组BUN、Scr及24 h mALB低于西药组,差异均具有统计学意义(P<0.05);模型组与正常组相比,大鼠肾组织TLR4、MyD88、NF-κB的表达明显上调;与模型组相比,西药组、梓醇组的肾组织TLR4、MyD88、NF-κB的表达明显下调。模型组、西药组、梓醇组TLR4、MyD88、NF-κB的mRNA相对表达量均明显高于正常组,且西药组、梓醇组TLR4、MyD88、NF-κB的mRNA相对表达量明显低于模型组,差异具有统计学意义(P<0.05);梓醇组TLR4、MyD88、NF-κB的mRNA相对表达量低于西药组,差异具有统计学意义(P<0.05)。结论梓醇对2型糖尿病大鼠肾损伤有一定保护作用,可能与抑制TLR4/MyD88/NF-κB信号通路异常激活有关。
