目的通过建立氧糖剥夺-缺氧复氧(oxygen-glucose deprivation/reoxygenation,OGD/R)损伤模型模拟心肌缺血再灌注损伤,探讨海藻糖对OGD/R大鼠H9C2心肌细胞损伤的影响及其作用机制。方法H9C2细胞分为对照组、OGD/R组、海藻糖组(OGD/R+海藻...目的通过建立氧糖剥夺-缺氧复氧(oxygen-glucose deprivation/reoxygenation,OGD/R)损伤模型模拟心肌缺血再灌注损伤,探讨海藻糖对OGD/R大鼠H9C2心肌细胞损伤的影响及其作用机制。方法H9C2细胞分为对照组、OGD/R组、海藻糖组(OGD/R+海藻糖)、联合组(OGD/R+海藻糖+ML385)。四甲基偶氮唑盐法检测细胞增殖能力,并通过检测乳酸脱氢酶及Hoechst/丙啶碘化物染色检测细胞膜受损情况。Western blot检测核因子E2相关因子2(nuclear factor erythroid 2-related factor 2,Nrf2)及其下游相关蛋白表达;活性氧、线粒体膜电位检测氧化应激水平;Western blot检测凋亡相关蛋白表达。结果与对照组比较,OGD/R组细胞活力明显降低。与OGD/R组比较,不同浓度海藻糖干预能显著提升细胞活力,与海藻糖浓度呈正相关(P<0.01);与OGD/R组比较,海藻糖组线粒体膜电位(mitochondrial membrane potential,MMP)、谷胱甘肽(glutathione,GSH)、Nrf2、血红素加氧酶1和烟酰胺腺嘌呤二核苷酸磷酸醌氧化还原酶1、Bcl-2、半胱氨酸天冬氨酸蛋白酶3(cysteinyl aspartate specific proteinase-3,Caspase-3)表达明显增高,活性氧、丙二醛、应答元素结合蛋白1、Bax、Bax/Bcl-2、裂解型Caspase-3表达明显降低,差异有统计学意义(P<0.05,P<0.01)。与海藻糖组比较,联合组活性氧、丙二醛及肿瘤坏死因子α、白细胞介素(interleukin,IL)1βmRNA、IL-6 mRNA表达明显增高,MMP、GSH水平明显降低,差异有统计学意义(P<0.05,P<0.01);联合组Bax、Bax/Bcl-2、裂解型Caspase-3表达明显高于海藻糖组(1.77±0.08 vs 1.20±0.20,3.41±1.45 vs 0.99±0.15,4.10±1.05 vs 1.79±0.52,P<0.01),Bcl-2、Caspase-3表达明显低于海藻糖组(0.58±0.21 vs 1.23±0.25,0.87±0.25 vs 1.45±0.31,P<0.01)。结论海藻糖可以被视为一种Nrf2激活剂,通过激活Nrf2抑制氧化应激和凋亡,改善OGD/R诱导的心肌细胞损伤。展开更多
宫颈癌的发展主要归因于高危人类乳头状瘤病毒(HR-HPVs)的感染。近年来发现HPV阳性宫颈癌的恶性生物学行为考虑可能为氧化应激环境的作用促进了病毒对宫颈鳞状上皮组织慢性感染所致的持续病变。抗氧化应激核心途径中的核转录因子E2相关...宫颈癌的发展主要归因于高危人类乳头状瘤病毒(HR-HPVs)的感染。近年来发现HPV阳性宫颈癌的恶性生物学行为考虑可能为氧化应激环境的作用促进了病毒对宫颈鳞状上皮组织慢性感染所致的持续病变。抗氧化应激核心途径中的核转录因子E2相关因子2 (Nrf2)和Kelch样ech相关蛋白1 (Keap1)成分对于稳定内环境至关重要。肿瘤的发展与Nrf2的过度激活有很大关联,而这一激活则引导了一系列涉及赋予肿瘤恶化特性自我增殖、迁移、调控基因的表达。Nrf2因具有多面性功能,研究者正尝试通过抑制Keap1-Nrf2-抗氧化反应元件(ARE)路径,来发展针对性癌症治疗方法。进行临床研究对相关靶点设计进一步的治疗方案,对宫颈癌治疗预后进展至关重要。Cervical carcinoma advancement is primarily linked to the presence of oncogenic human papillomavirus (HPV) types. Recent investigations suggest the neoplastic activities associated with HPV-positive cervical neoplasms could stem from oxidative stress, which drives prolonged pathological transformation in the cervix’s epithelium as a consequence of continuous viral onslaught. The Nrf2/Keap1 signaling pathway is a key molecule regulating oxidative stress. The Nrf2 protein is activated in tumors, and activated Nrf2 participates in malignant biological behaviors such as tumor cell replication, implantation, and invasion after being activated by multiple target genes. Modulating the interaction among Keap1, Nrf2, and the antioxidant response element (ARE) is increasingly recognized as an elaborate approach in cancer therapy, given Nrf2’s complex regulatory effects. Advancing clinical investigations to devise sophisticated therapeutic strategies targeting specific molecules is imperative for enhancing the treatment outcomes of cervical carcinoma.展开更多
文摘目的通过建立氧糖剥夺-缺氧复氧(oxygen-glucose deprivation/reoxygenation,OGD/R)损伤模型模拟心肌缺血再灌注损伤,探讨海藻糖对OGD/R大鼠H9C2心肌细胞损伤的影响及其作用机制。方法H9C2细胞分为对照组、OGD/R组、海藻糖组(OGD/R+海藻糖)、联合组(OGD/R+海藻糖+ML385)。四甲基偶氮唑盐法检测细胞增殖能力,并通过检测乳酸脱氢酶及Hoechst/丙啶碘化物染色检测细胞膜受损情况。Western blot检测核因子E2相关因子2(nuclear factor erythroid 2-related factor 2,Nrf2)及其下游相关蛋白表达;活性氧、线粒体膜电位检测氧化应激水平;Western blot检测凋亡相关蛋白表达。结果与对照组比较,OGD/R组细胞活力明显降低。与OGD/R组比较,不同浓度海藻糖干预能显著提升细胞活力,与海藻糖浓度呈正相关(P<0.01);与OGD/R组比较,海藻糖组线粒体膜电位(mitochondrial membrane potential,MMP)、谷胱甘肽(glutathione,GSH)、Nrf2、血红素加氧酶1和烟酰胺腺嘌呤二核苷酸磷酸醌氧化还原酶1、Bcl-2、半胱氨酸天冬氨酸蛋白酶3(cysteinyl aspartate specific proteinase-3,Caspase-3)表达明显增高,活性氧、丙二醛、应答元素结合蛋白1、Bax、Bax/Bcl-2、裂解型Caspase-3表达明显降低,差异有统计学意义(P<0.05,P<0.01)。与海藻糖组比较,联合组活性氧、丙二醛及肿瘤坏死因子α、白细胞介素(interleukin,IL)1βmRNA、IL-6 mRNA表达明显增高,MMP、GSH水平明显降低,差异有统计学意义(P<0.05,P<0.01);联合组Bax、Bax/Bcl-2、裂解型Caspase-3表达明显高于海藻糖组(1.77±0.08 vs 1.20±0.20,3.41±1.45 vs 0.99±0.15,4.10±1.05 vs 1.79±0.52,P<0.01),Bcl-2、Caspase-3表达明显低于海藻糖组(0.58±0.21 vs 1.23±0.25,0.87±0.25 vs 1.45±0.31,P<0.01)。结论海藻糖可以被视为一种Nrf2激活剂,通过激活Nrf2抑制氧化应激和凋亡,改善OGD/R诱导的心肌细胞损伤。
文摘宫颈癌的发展主要归因于高危人类乳头状瘤病毒(HR-HPVs)的感染。近年来发现HPV阳性宫颈癌的恶性生物学行为考虑可能为氧化应激环境的作用促进了病毒对宫颈鳞状上皮组织慢性感染所致的持续病变。抗氧化应激核心途径中的核转录因子E2相关因子2 (Nrf2)和Kelch样ech相关蛋白1 (Keap1)成分对于稳定内环境至关重要。肿瘤的发展与Nrf2的过度激活有很大关联,而这一激活则引导了一系列涉及赋予肿瘤恶化特性自我增殖、迁移、调控基因的表达。Nrf2因具有多面性功能,研究者正尝试通过抑制Keap1-Nrf2-抗氧化反应元件(ARE)路径,来发展针对性癌症治疗方法。进行临床研究对相关靶点设计进一步的治疗方案,对宫颈癌治疗预后进展至关重要。Cervical carcinoma advancement is primarily linked to the presence of oncogenic human papillomavirus (HPV) types. Recent investigations suggest the neoplastic activities associated with HPV-positive cervical neoplasms could stem from oxidative stress, which drives prolonged pathological transformation in the cervix’s epithelium as a consequence of continuous viral onslaught. The Nrf2/Keap1 signaling pathway is a key molecule regulating oxidative stress. The Nrf2 protein is activated in tumors, and activated Nrf2 participates in malignant biological behaviors such as tumor cell replication, implantation, and invasion after being activated by multiple target genes. Modulating the interaction among Keap1, Nrf2, and the antioxidant response element (ARE) is increasingly recognized as an elaborate approach in cancer therapy, given Nrf2’s complex regulatory effects. Advancing clinical investigations to devise sophisticated therapeutic strategies targeting specific molecules is imperative for enhancing the treatment outcomes of cervical carcinoma.
