Objective: When nerve injury or inflammatory injury, different miRNA-mediated signal pathways are activated or inactivated, causing pain or hyperalgesia. Therefore, miRNA has become a new direction of pain mechanism r...Objective: When nerve injury or inflammatory injury, different miRNA-mediated signal pathways are activated or inactivated, causing pain or hyperalgesia. Therefore, miRNA has become a new direction of pain mechanism research. We aimed to investigate the effect and mechanism of miR-362-3p on neuropathic pain in rats with chronic sciatic nerve injury (CCI). Methods: Neuropathic pain CCI rat model was established. Real-time-quantitative polymerase chain reaction (RT-PCR), Western blot, immunofluorescence, intrathecal injection, Enzyme-linked immunosorbent assay (ELISA), and dual luciferase reporter gene assays were used to explore the role of miR-362-3p in neuropathic pain development and the relationship between miR-362-3p and JMJD1A (Jumonji domain-containing 1A). Results: In the CCI group, the miR-362-3p level was increased and JMJD1A level was reduced in spinal cords and isolated microglia. The paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) values were increased, the secretion of inflammatory factors was reduced, and the microglial marker Iba1 expression was decreased after intrathecal administration of miR-362-3p. miR-362-3p was observed to target JMJD1A. JMJD1A elevation abolished the inhibitory effects of miR-362-3p on neuropathic pain development. Conclusion: Intrathecal administration of miR-362-3p significantly relieved neuropathic pain in CCI rats and inhibited neuroinflammation possibly through regulating JMJD1A.展开更多
高危型人乳头瘤病毒(High-risk human papillomavirus,HPV)感染是宫颈癌发病的重要因素,但高危型HPV感染引起宫颈上皮恶变的机制尚不清楚。微小RNA(micro RNA,miR)-362-3p是具有抑癌活性的miR,在宫颈癌中表达降低;Nemo样激酶(Nemo-like ...高危型人乳头瘤病毒(High-risk human papillomavirus,HPV)感染是宫颈癌发病的重要因素,但高危型HPV感染引起宫颈上皮恶变的机制尚不清楚。微小RNA(micro RNA,miR)-362-3p是具有抑癌活性的miR,在宫颈癌中表达降低;Nemo样激酶(Nemo-like kinase,NLK)是生物信息学预测得到的miR-362-3p靶基因,在宫颈癌中表达增加。但宫颈癌发病过程中高危型HPV感染与miR-362-3p、NLK的关系尚不清楚。本研究检测了miR-362-3p、NLK在宫颈癌组织及宫颈癌细胞株中的变化,并通过转染miR-362-3p模拟物、NLK表达质粒的方式验证了miR-362-3p靶向NLK调节高危型HPV阳性宫颈癌细胞增殖的作用。结果显示:与癌旁组织比较,宫颈癌组织中miR-362-3p的表达明显降低、NLK的表达明显增加且与高危型HPV阴性的宫颈癌组织比较,高危型HPV阳性的宫颈癌组织中miR-362-3p的表达明显降低、NLK的表达明显增加;与正常宫颈上皮细胞比较,HPV16感染的SiHa细胞、HPV18感染的HeLa细胞及HPV阴性的C33A细胞中miR-362-3p的表达明显降低、NLK的表达明显增加且SiHa细胞中miR-362-3p表达降低、NLK表达增加最明显;在SiHa细胞中,过表达miR-362-3p能够降低细胞活力及NLK的表达,同时也使NLK双荧光素酶报告基因的荧光活力降低;过表达NLK能够逆转miR-362-3p降低细胞活力及NLK表达的作用。以上结果表明宫颈癌中高危型HPV感染与miR-362-3p低表达、NLK高表达有关,过表达miR-362-3p通过靶向抑制NLK降低高危型HPV感染宫颈癌细胞的增殖活力。本研究的创新点在于初步探索了高危型HPV感染促进宫颈癌细胞增殖的作用及机制,在高危型HPV感染的宫颈癌中miR-362-3p表达减少并靶向引起NLK表达增加,进而促进了宫颈癌细胞的增殖,这为将来深入认识高危型HPV引起宫颈癌发病的机制提供依据。展开更多
文摘Objective: When nerve injury or inflammatory injury, different miRNA-mediated signal pathways are activated or inactivated, causing pain or hyperalgesia. Therefore, miRNA has become a new direction of pain mechanism research. We aimed to investigate the effect and mechanism of miR-362-3p on neuropathic pain in rats with chronic sciatic nerve injury (CCI). Methods: Neuropathic pain CCI rat model was established. Real-time-quantitative polymerase chain reaction (RT-PCR), Western blot, immunofluorescence, intrathecal injection, Enzyme-linked immunosorbent assay (ELISA), and dual luciferase reporter gene assays were used to explore the role of miR-362-3p in neuropathic pain development and the relationship between miR-362-3p and JMJD1A (Jumonji domain-containing 1A). Results: In the CCI group, the miR-362-3p level was increased and JMJD1A level was reduced in spinal cords and isolated microglia. The paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) values were increased, the secretion of inflammatory factors was reduced, and the microglial marker Iba1 expression was decreased after intrathecal administration of miR-362-3p. miR-362-3p was observed to target JMJD1A. JMJD1A elevation abolished the inhibitory effects of miR-362-3p on neuropathic pain development. Conclusion: Intrathecal administration of miR-362-3p significantly relieved neuropathic pain in CCI rats and inhibited neuroinflammation possibly through regulating JMJD1A.
文摘高危型人乳头瘤病毒(High-risk human papillomavirus,HPV)感染是宫颈癌发病的重要因素,但高危型HPV感染引起宫颈上皮恶变的机制尚不清楚。微小RNA(micro RNA,miR)-362-3p是具有抑癌活性的miR,在宫颈癌中表达降低;Nemo样激酶(Nemo-like kinase,NLK)是生物信息学预测得到的miR-362-3p靶基因,在宫颈癌中表达增加。但宫颈癌发病过程中高危型HPV感染与miR-362-3p、NLK的关系尚不清楚。本研究检测了miR-362-3p、NLK在宫颈癌组织及宫颈癌细胞株中的变化,并通过转染miR-362-3p模拟物、NLK表达质粒的方式验证了miR-362-3p靶向NLK调节高危型HPV阳性宫颈癌细胞增殖的作用。结果显示:与癌旁组织比较,宫颈癌组织中miR-362-3p的表达明显降低、NLK的表达明显增加且与高危型HPV阴性的宫颈癌组织比较,高危型HPV阳性的宫颈癌组织中miR-362-3p的表达明显降低、NLK的表达明显增加;与正常宫颈上皮细胞比较,HPV16感染的SiHa细胞、HPV18感染的HeLa细胞及HPV阴性的C33A细胞中miR-362-3p的表达明显降低、NLK的表达明显增加且SiHa细胞中miR-362-3p表达降低、NLK表达增加最明显;在SiHa细胞中,过表达miR-362-3p能够降低细胞活力及NLK的表达,同时也使NLK双荧光素酶报告基因的荧光活力降低;过表达NLK能够逆转miR-362-3p降低细胞活力及NLK表达的作用。以上结果表明宫颈癌中高危型HPV感染与miR-362-3p低表达、NLK高表达有关,过表达miR-362-3p通过靶向抑制NLK降低高危型HPV感染宫颈癌细胞的增殖活力。本研究的创新点在于初步探索了高危型HPV感染促进宫颈癌细胞增殖的作用及机制,在高危型HPV感染的宫颈癌中miR-362-3p表达减少并靶向引起NLK表达增加,进而促进了宫颈癌细胞的增殖,这为将来深入认识高危型HPV引起宫颈癌发病的机制提供依据。
