ObjectiveThe diagnostic efficacy of circulating long non-coding RNA (lncRNA) for tuberculosis was evaluated by systematic review. MethodsData from PubMed, Web of Science, Cochrane Library, Embase, Chinese Medical Journals Full-Text Database(CMJFD), CNKI and WanFang Data were searched. Literatures on the diagnostic value of lncRNA in tuberculosis from the database establishment to August 20, 2024 were selected, and the quality of literatures was assessed using QUADAS-2 tool. Meta-Disc 1.0 software tested the threshold heterogeneity of the included studies. Stata18.0 software calculated sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, diagnostic odds ratio and other effect sizes, and performed subgroup analysis and meta regression to explore the source of heterogeneity. Deeks funnel plot evaluates publication bias. Results A total of 28 case-control studies were included in 14 literatures. The meta-results showed that the combined sensitivity was 0.88 (95%CI:0.81-0.93), the specificity was 0.90 (95%CI:0.84-0.94), and the PLR was 9.05 (95%CI:5.16-15.87). The NLR and DOR were 0.13 (95%CI:0.08-0.22) and 67.96 (95%CI:27.27-169.39), and the AUC were 0.95 (95%CI: 0.93-0.97). Subgroup analysis showed that lncRNA was more effective in the diagnosis of tuberculosis when PMBC samples, LncRNA expression was down-regulation, the study sample size was ≤100, there was cut-off value, GAPDH was used as the internal reference, and RNA extraction kit was used. meta regression indicated that lncRNA expression level and sample size were the main sources of heterogeneity. Conclusions lncRNA has high accuracy in the diagnosis of tuberculosis, and is expected to become a new biomarker to assist the diagnosis of tuberculosis.
ObjectiveTo observe the effect of lncRNA-metastasis-associated lung adenocarcinoma transcript 1(MALAT1)on colorectal cancer cells-induced angiogenesis, and explore the potential underlying mechanism. MethodsMALAT1 was overexpressed in colorectal cancer cells SW48 by plasmids transfection, then SW48 cells were cultured at normoxia or hypoxia conditions. The culture media was collected, and the concentration of vascular endothelial growth factor (VEGF) in the media was measured by the enzyme-linked immuno sorbent assay (ELISA), and the human umbilical vein endothelial cells (HUVEC) were incubated with the media collected above. Meanwhile, the expression of hypoxia-inducible factor-1α(HIF-1α) in SW48 cells was detected by western blot. ResultsOverexpression of MALAT1 increased the VEGF level in the culture media, normoxia:the MALAT1 group (514±32) mg/L vs. the control group (110±14) mg/L, P < 0.05; hypoxia:the MALAT1 group (928±18) mg/L vs. the control group (230±21) mg/L, P < 0.05. Meanwhile, the tube formation activity of HUVEC was enhanced, and the expression of HIF-1αwas elevated in the MALAT1 group by western blot. ConclusionOverexpression of MALAT1 could promote colorectal cancer cells-mediated angiogenesis, it may be developed as a new drug target for colorectal cancer treatment.