芒针对脊髓损伤大鼠运动功能和炎症水平的影响

目的探究芒针深刺秩边穴对大鼠脊髓损伤后运动功能的影响及可能作用机制。方法选择健康雄性Wister大鼠81只,随机分为正常组、模型组和芒针组(正常组9只,其余两组各36只),采用改良Allen's造模法制备大鼠脊髓中度损伤模型,模型组不做特殊处理,芒针组采用芒针深刺秩边穴,每日1次,每次30 min。分别于术后1 d、3 d、5 d、7 d行BBB(Basso-Beattie-Bresnahan)运动功能评分;术后1 d、3 d、5 d、7 d取受损段脊髓组织行酶联免疫吸附测定(ELISA)、实时荧光定量PCR(RT-qPCR)和苏木素-伊红染色(HE染色)。结果术后5 d和7 d,芒针组大鼠BBB评分高于模型组,差异有统计学意义(P<0.01);脊髓损伤后,模型组和芒针组大鼠脊髓组织中高迁移率族蛋白B1(HMGB1)、核转录因子kB(NF-kB)、白介素-6(IL-6)含量及HMGB1mRNA、NF-kBmRNA、IL-6mRNA水平显著升高(P<0.05);受损的脊髓组织松散,灰质中有许多空洞形成,伴有炎性细胞浸润。芒针治疗后,芒针组大鼠脊髓组织中HMGB1、NF-kB、IL-6含量及HMGB1mRNA、NF-kBmRNA、IL-6mRNA水平较模型组降低,且在3 d、5 d、7 d差异有统计学意义(P<0.05);受损部位的空洞及炎性细胞逐渐减少。结论脊髓损伤后,炎症因子的大量聚集引起级联性炎症反应,影响大鼠运动功能的恢复。芒针的抗炎机制可能包括抑制HMGB1的表达,降低NF-kB信号通路的传导,下调促炎因子IL-6的分泌。     

Expression of long non-coding RNA LOC285194 and its prognostic significance in human pancreatic ductal adenocarcinoma

Introduction: Dysregulation of long non-coding RNAs (lncRNAs) plays critical roles in tumor progression. lncRNA LOC285194 was previously shown to be correlated with aggressive clinicopathological features and poor prognosis in several cancers. The aim of this study was to investigate relationship between LOC285194 expression and clinical outcomes in human pancreatic ductal adenocarcinoma (PDAC). Methods: Quantitative real-time PCR (qRT-PCR) assay was performed to detect the expression of lncRNA LOC285194 in human PDAC cells and tissue samples. The association of LOC285194 expression with clinicopathologic features was analyzed. Kaplan-Meier analyses were used to assess survival of patients. Univariate and multivariate analyses were performed using the Cox proportional hazards model to analyze the prognostic significance of LOC285194 expression. Results: Our data showed that the relative level of LOC285194 in PDAC cells was significantly lower than that in normal human pancreatic duct epithelial cell line. Also, the expression of LOC285194 in PDAC tissues was significantly lower than that in adjacent non-tumor tissues. By statistical analyses, low LOC285194 expression was observed to be closely correlated with clinical stage, lymphnode metastasis and liver metastasis. Kaplan-Meier survival analysis revealed that patients with low LOC285194 expression had a poor overall survival compared with the high LOC285194 group (P < 0.05). Univariate and multivariate analyses showed that low LOC285194 expression was an independent poor prognostic factor for PDAC patients. Conclusions: Our data provided the first evidence that reduced LOC285194 in PDAC tissues was correlated with tumor progression, and lncRNA LOC285194 might be a potential molecular biomarker for predicting the prognosis of patients.     

Long-noncoding RNA IFNG-AS1 exerts oncogenic properties by interacting with epithelial splicing regulatory protein 2 (ESRP2) in pituitary adenomas

Despite the enormous development of medical technologies in recent decades, pituitary adenoma (PA) remains among the most refractory cancers in the world. Elucidating the molecular mechanisms underlying the pathology of PA is essential to identify new treatments for PA. In the present study, we found that IFNG-AS1 expression was significantly higher in PA tissues than in nontumor tissues via qRT-PCR and RNA fluorescence in situ hybridization (FISH). shRNA-mediated IFNG-AS1 knockdown in HP75 cells significantly inhibited tumor progression, and IFNG-AS1 overexpression remarkably promoted tumor progression. Epithelial splicing regulatory protein 2 (ESRP2) was demonstrated to be a target protein of IFNG-AS1 in PA; knocking down ESRP2 reversed the tumor-inhibitory effects of IFNG-AS1 knockdown, and overexpressing ESRP2 abolished the tumor-promoting effects of IFNG-AS1 overexpression in HP75 cells. In conclusion, our findings suggested that IFNG-AS1 may function as an oncogene in PA by interacting with ESRP2.     

长链非编码RNA THOR在生殖与肿瘤中调控的研究现状

睾丸相关的高度保守的致癌性lncRNA(Testis-associated Highly-conserved Oncogenic long non-coding RNA,THOR)是一类非编码RNA,在哺乳动物睾丸及肿瘤组织中特异性表达,参与雄性生殖过程,调控肿瘤细胞的发生发展。本文对lnc-THOR在生殖和肿瘤中的研究进展进行综述,为雄性生殖有关疾病和肿瘤的表观遗传机制研究提供新的见解,并为其寻找潜在的治疗靶点。     

长非编码RNA在视网膜发育和眼部病变中的作用

长非编码RNA(lncRNA)是一类长度大于200个核苷酸,不具有编码蛋白功能的转录本,在哺乳动物细胞转录本中占很大比例.近年来,旨在阐明lncRNA在发育和疾病中功能的研究急剧增加.已经证实这类非编码RNA可以在表观遗传、转录和转录后水平调控基因表达.视网膜的发育依赖于复杂而精确的转录作用和转录调控.在这些调节机制中,lncRNA起到了重要的作用.现已知或预测lncRNA参与视网膜细胞亚型的分化和发育,并与若干眼部疾病相关.虽然,大部分lncRNA的分子机制还不清楚,但是它们很可能是决定视网膜细胞命运的重要组成部分.在视网膜发育中,lncRNA可诱导细胞分化、影响细胞周期并调控X染色体失活.在无眼畸形、糖尿病视网膜病变和脊髓小脑运动失调7型等眼部疾病中,lncRNA也发挥了重要作用.本文综述lncRNA在视网膜发育及眼部疾病中作用的最新研究进展及存在的问题,对基础和临床研究及药物靶点开发具有重要意义.