目的:观察玻璃体腔注射VAS2870对C57小鼠氧诱导视网膜病变的影响。方法:将新生C57BL/6J小鼠随机分为3组,分别为正常对照组、VAS2870注射OIR组和无菌PBS缓冲液注射OIR组。将后两组小鼠在出生后第7d(P7)至P12置于体积分数为75%±2%的...目的:观察玻璃体腔注射VAS2870对C57小鼠氧诱导视网膜病变的影响。方法:将新生C57BL/6J小鼠随机分为3组,分别为正常对照组、VAS2870注射OIR组和无菌PBS缓冲液注射OIR组。将后两组小鼠在出生后第7d(P7)至P12置于体积分数为75%±2%的恒定高氧氧箱中以构建OIR模型,在P12时给予幼鼠双眼玻璃体腔注射VAS2870(0.5μL),另一组幼鼠双眼注射同等剂量的无菌PBS缓冲液。三组小鼠均在P17时取右眼行视网膜铺片和Lectin染色,观察视网膜中央无血管区及病理性新生血管的情况;取右眼行视网膜组织定量检测ROS/RNS含量;取左眼应用RT-PCR检测Nox4 m RNA含量,并应用Western-blot测定视网膜组织中VEGF的表达。结果:VAS2870注射OIR组小鼠视网膜中央无血管区面积较无菌PBS缓冲液注射OIR组明显减少(P<0.05),病理性新生血管数目明显减少(P<0.05);VAS2870注射OIR组小鼠视网膜组织Nox4 m RNA的表达量明显低于无菌PBS缓冲液注射组;VAS2870注射OIR组小鼠视网膜组织ROS含量较无菌PBS缓冲液注射组明显降低(P<0.05);VAS2870注射OIR组小鼠视网膜组织VEGF的表达明显低于无菌PBS缓冲液注射组(P<0.05)。结论:在小鼠OIR模型中,VAS2870可抑制Nox4 m RNA的表达,减少ROS/RNS,下调VEGF的生成,在视网膜病变进程中具有保护作用。展开更多
BACKGROUND Ferroptosis is involved in developing inflammatory diseases;yet,its role in acute hypertriglyceridemic pancreatitis(HTGP)remains unclear.AIM To explore whether ferroptosis is involved in the process of HTGP...BACKGROUND Ferroptosis is involved in developing inflammatory diseases;yet,its role in acute hypertriglyceridemic pancreatitis(HTGP)remains unclear.AIM To explore whether ferroptosis is involved in the process of HTGP and elucidate its potential mechanisms.METHODS An HTGP mouse model was induced using intraperitoneal injection of P-407 and caerulein(CAE).Then,pancreatic tissues from the model animals were subjected to proteome sequencing analysis.The pathological changes and scores of the pancreas,lung,and kidney were determined using hematoxylin-eosin staining.The levels of serum amylase(AMY),triglyceride,and total cholesterol were measured with an automatic blood cell analyzer.Additionally,the serum levels of tumor necrosis factor(TNF)-α,interleukin(IL)-6,and IL-1βwere determined by enzyme linked immunosorbent assay.Malonaldehyde(MDA),glutathione(GSH),and Fe^(2+)were detected in the pancreas.Finally,immunohistochemistry was performed to assess the expression of ferroptosis-related proteins.RESULTS Proteome sequencing revealed that ferroptosis was involved in the process of HTGP and that NADPH oxidase(NOX)2 may participate in ferroptosis regulation.Moreover,the levels of serum AMY,TNF-α,IL-6,and IL-1βwere significantly increased,MDA and Fe^(2+)were upregulated,GSH and ferroptosis-related proteins were reduced,and the injury of the pancreas,lung,and kidney were aggravated in the P407+CAE group compared to CAE and wild type groups(all P<0.05).Notably,the inhibition of ferroptosis and NOX2 attenuated the pathological damage and the release of TNF-α,IL-6,and IL-1βin the serum of the mice.CONCLUSION Ferroptosis was found to have an important role in HTGP and may be considered a potential target for clinical treatment.展开更多
文摘目的:观察玻璃体腔注射VAS2870对C57小鼠氧诱导视网膜病变的影响。方法:将新生C57BL/6J小鼠随机分为3组,分别为正常对照组、VAS2870注射OIR组和无菌PBS缓冲液注射OIR组。将后两组小鼠在出生后第7d(P7)至P12置于体积分数为75%±2%的恒定高氧氧箱中以构建OIR模型,在P12时给予幼鼠双眼玻璃体腔注射VAS2870(0.5μL),另一组幼鼠双眼注射同等剂量的无菌PBS缓冲液。三组小鼠均在P17时取右眼行视网膜铺片和Lectin染色,观察视网膜中央无血管区及病理性新生血管的情况;取右眼行视网膜组织定量检测ROS/RNS含量;取左眼应用RT-PCR检测Nox4 m RNA含量,并应用Western-blot测定视网膜组织中VEGF的表达。结果:VAS2870注射OIR组小鼠视网膜中央无血管区面积较无菌PBS缓冲液注射OIR组明显减少(P<0.05),病理性新生血管数目明显减少(P<0.05);VAS2870注射OIR组小鼠视网膜组织Nox4 m RNA的表达量明显低于无菌PBS缓冲液注射组;VAS2870注射OIR组小鼠视网膜组织ROS含量较无菌PBS缓冲液注射组明显降低(P<0.05);VAS2870注射OIR组小鼠视网膜组织VEGF的表达明显低于无菌PBS缓冲液注射组(P<0.05)。结论:在小鼠OIR模型中,VAS2870可抑制Nox4 m RNA的表达,减少ROS/RNS,下调VEGF的生成,在视网膜病变进程中具有保护作用。
基金Supported by the National Natural Science Foundation of Shandong Province,No.ZR2021MH032.
文摘BACKGROUND Ferroptosis is involved in developing inflammatory diseases;yet,its role in acute hypertriglyceridemic pancreatitis(HTGP)remains unclear.AIM To explore whether ferroptosis is involved in the process of HTGP and elucidate its potential mechanisms.METHODS An HTGP mouse model was induced using intraperitoneal injection of P-407 and caerulein(CAE).Then,pancreatic tissues from the model animals were subjected to proteome sequencing analysis.The pathological changes and scores of the pancreas,lung,and kidney were determined using hematoxylin-eosin staining.The levels of serum amylase(AMY),triglyceride,and total cholesterol were measured with an automatic blood cell analyzer.Additionally,the serum levels of tumor necrosis factor(TNF)-α,interleukin(IL)-6,and IL-1βwere determined by enzyme linked immunosorbent assay.Malonaldehyde(MDA),glutathione(GSH),and Fe^(2+)were detected in the pancreas.Finally,immunohistochemistry was performed to assess the expression of ferroptosis-related proteins.RESULTS Proteome sequencing revealed that ferroptosis was involved in the process of HTGP and that NADPH oxidase(NOX)2 may participate in ferroptosis regulation.Moreover,the levels of serum AMY,TNF-α,IL-6,and IL-1βwere significantly increased,MDA and Fe^(2+)were upregulated,GSH and ferroptosis-related proteins were reduced,and the injury of the pancreas,lung,and kidney were aggravated in the P407+CAE group compared to CAE and wild type groups(all P<0.05).Notably,the inhibition of ferroptosis and NOX2 attenuated the pathological damage and the release of TNF-α,IL-6,and IL-1βin the serum of the mice.CONCLUSION Ferroptosis was found to have an important role in HTGP and may be considered a potential target for clinical treatment.
