Effect of microRNA-186 on oxidative stress injury of neuron by targeting interleukin 2 through the janus kinase-signal transducer and activator of transcription pathway in a rat model of Alzheimer's disease
JOURNAL OF CELLULAR PHYSIOLOGY
Authors: Wu, Dong-Mei; Wen, Xin; Wang, Yong-Jian; Han, Xin-Rui; Wang, Shan; Shen, Min; Fan, Shao-Hua; Zhuang, Juan; Zhang, Zi-Feng; Shan, Qun; Li, Meng-Qiu; Hu, Bin; Sun, Chun-Hui; Lu, Jun; Chen, Gui-Quan; Zheng, Yuan-Lin
Abstract
Recent studies have proposed that microRNAs (miR) function as novel diagnostic and prognostic biomarkers and therapeutic targets in Alzheimer's disease (AD), a common disease among the elderly. In the current study, we aim to explore the effect of miR-186 on oxidative stress injury of neuron in rat models ofAD with the involvement of the interleukin-2 (IL2) and the Janus kinase/signal transducers and activators of transcription (JAK-STAT) pathways. AD rat models were established, and dual-luciferase reporter assay and online software were used to confirm the targeting relationship between miR-186 and IL2. Immunohistochemistry was usedevaluating the positive rate of IL2. Afterward, to define the role of miR-186 in AD, miR-186, IL2, and JAK-STAT related protein (JAK2, STAT3) expressions were quantified. Cell proliferation was measured by 3-(4,5-dimethylthiazol-2-yl)2,5-diphenyl tetrazolium bromide, and cell apoptosis was detected by flow cytometry. We observed downregulated miR-186 and IL2 and upregulated JAK-STAT signaling pathway related genes in AD. The overexpression of miR-186 was shown to significantly promote cell proliferation while suppressing cell apoptosis along with the expression of the IL2 and JAK-STAT signaling pathway related protein. Collectively, the key findings obtained from the current study define the potential role of miR-186 as an inhibitor of AD development by downregulation of IL2 through suppression of the JAK-STAT signaling pathway.
Non-significant association between-330 T/G polymorphism in interleukin-2 gene and chronic periodontitis: findings from a meta-analysis
BMC ORAL HEALTH
Authors: da Silva, Felipe Rodolfo Pereira; Galeno, Juliana Gomes; Leal, Alessandro Luiz Araujo Bentes; Koga, Reyce Santos; Batista, Nayana Yared; da Conceicao Furtado, Silvania; Vasconcelos, Daniel Fernando Pereira; Carvalho, Marcelo Diniz; Barcellos, Jose Fernando Marques
Abstract
Background Chronic periodontitis (CP) is an immune-inflammatory disease that promotes tissue damage around the teeth. Among the several inflammatory mediators that orchestrate the periodontitis, there is the interleukin (IL)-2. Genetic variations in IL2 gene may be associated with the risk and severity of the disease. Contrary results are available in the literature with inconclusive findings and none meta-analysis to gather these data. Methods A literature search was performed for studies published before June 11, 2019 in diverse scientific and educational databases. The data was extracted by two investigators and the statistical evaluation was performed by Review Manager statistical program with heterogeneity (I-2) and Odds Ratio (OR) with 95% of Confidence Intervals (CI) calculations and a sensitive analysis to assess the accuracy of the obtained results. The publication bias was evaluated by Begg' and Egger's test with Comprehensive meta-analysis software. The value of P < 0.05 was considered as significant. Results Five studies were identified in diverse ethnical groups with 1425 participants. The - 330 T/G polymorphism in IL2 gene was not significantly associated with CP in allelic evaluation (P > 0.05) as well as in the genotypic comparisons (P = 0.15). The Begg's test and the linear regression Egger's test did not show any evidence of publication bias risk (P > 0.05) which was corroborated by the absence of obvious asymmetry in Funnel plot graphic. Conclusions This meta-analysis showed a non-significant association between - 330 T/G polymorphism in IL2 gene and CP in any allelic evaluation.