LncRNA OIP5-AS1 affects the biological behaviors of chondrocytes of patients with osteoarthritis by regulating micro-30a-5p.

OBJECTIVE: Osteoarthritis (OA) is a prevalent chronic orthopedic disease, but its relationship with the lncRNA OIP5 Antisense RNA 1(OIP5-AS1)/micro-30a-5p axis is still under investigation. This study was designed to explore the regulatory function of this axis on chondrocytes. PATIENTS AND METHODS: A quantitative polymerase chain reaction (qPCR) assay was carried out to quantify lncRNA OIP5-AS1 and micro-30a-5p in cartilage tissues of patients with OA, and lncRNA OIP5-AS1 siRNA, micro-30a-5p mimics, and micro-30a-5p inhibitor vectors were constructed to analyze the functions of lncRNA OIP5-AS1/micro-30a-5p on chondrocytes. In addition, the Western blot was used to determine the levels of proteins in chondrocytes, the 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT)assay to determine the viability of chondrocytes, the flow cytometry to analyze apoptosis and cycle of them, and the Dual-Luciferase reporter gene assay to verify the targeting relationship between LncRNA OIP5-AS1 and micro-30a-5p. RESULTS: LncRNA OIP5-AS1 in cartilage tissues of patients with OA decreased, while micro-30a-5p in them increased and increased with apoptosis. Down-regulation of lncRNA OIP5-AS1 gave rise to increased micro-30a-5p, and up-regulation of micro-30a-5p or down-regulation of lncRNA OIP5-AS1 brought about cell apoptosis and inflammatory response, and inhibited cell proliferation, while up-regulation of micro-30a-5p suppressed cell apoptosis and inflammatory response, and accelerated cell proliferation. LncRNA OIP5-AS1 affected chondrocytes by negatively regulating micro-30a-5p. CONCLUSIONS: LncRNA OIP5-AS1 inhibits the apoptosis and inflammatory response of chondrocytes and promotes their survival by targetedly inhibiting micro-30a-5p, and both up-regulation of lncRNA OIP5-AS1 and down-regulation of micro-30a-5p is beneficial to patients with OA.

Transcriptome analysis of peach (Prunus persica L. Batsch) during the late stage of fruit ripening.

Fruit ripening is a complex developmental process, the details of which remain largely unknown in fleshy fruits. In this paper, the fruit flesh of two peach varieties, "Zhongyou9" (a nectarine; Prunus persica L. Batsch) and its mutant "Hongyu", was analyzed by RNA-seq technology during two stages of ripening at 20-day intervals. One hundred and eighty significant upregulated and two hundred and thirty-five downregulated genes were identified in the experiment. Many of these genes were related to plant hormones, chlorophyll breakdown, accumulation of aroma and flavor volatiles, and stress. To the best of our knowledge, this is the first transcriptome analysis of peach ripening, and our data will be useful for further studies of the molecular basis of fruit ripening.