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MicroRNA - Wiley Online Library

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Last Updated: 23 April 2022

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Exosomes derived from microRNA‐21 overexpressed adipose tissue‐derived mesenchymal stem cells alleviate spine osteoporosis in ankylosing spondylitis mice

MicroRNA 2121 can promote proliferation and differentiation of mesenchymal stem cells to promote bone formation, so we therefore investigated whether exosomes derived from miR-21 overexpressing adipose tissuederived MSCs could cause spine osteoporosis in ankylosing spondylitis mice. MiR-21 levels in ADMSCs and their exosomes have significantly raised miR-21 levels in ADMVSCs and their exosomes, thanks to their transfection of miR21.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/term.3304


Extracellular vesicles and their microRNA cargo in ischaemic stroke

Acute ischaemic stroke is the most common cause of death and disability. The EVs produced by mesenchymal stem cells have been extensively studied for their therapeutic potential. Both recent preclinical and clinical studies have shown that AIS is associated with specific EV-derived miRNAs, including those delivered via MSC-derived EVs. In addition, new research has shown that miRNAs produced by specific EV-derived miRNAs in AIS modulate levels of specific EV-derived miRNAs, establishing a novel therapeutic role in stroke therapy. MiRNA-124 was both an EV-packaged biomarker and as a potential EV-loaded therapeutic in experimental models. In preclinical, clinical, and MSC-EV-mediated neuroprotection in experimental stroke, miRNA17 families and miRNA1792 clusters were found in preclinical, epidemiological, and miRNA-1792 clusters. In addition, this research will help determine whether circulating EV-packaged miRNAs as biomarkers of AIS or as novel therapeutics in this setting.

Source link: https://onlinelibrary.wiley.com/doi/10.1113/JP282050


Profiling of circulating chromosome 21‐encoded microRNAs, miR‐155, and let‐7c, in down syndrome

Abstract Background Down syndrome is the most common chromosomal aneuploidy. The risk of AD in DS is higher considering that this group can also suffer from metabolic diseases such as obesity, dyslipidemia, and diabetes mellitus. The microRNAs are among the extra genetic material that characterizes DS' DS's genetic makeup that includes overexpression of AD's key pathophysiological proteins and gene expression regulators.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/mgg3.1938


MicroRNA‐342‐3p regulates yak oocyte meiotic maturation by targeting DNA methyltransferase 1

During yak oocyte maturation, we had previously shown a different response to miR342–3p. We examined miR-322/3p in miotic maturation of yak oocytes and the underlying mechanism in this research. By RT qPCR and western blot analyses, the profile of ovarian DNA methyltransferase 1 expression was investigated in yak. Dnmt1 expression in several meiotic stages of yak oocyte maturation was then measured by immunofluorescence staining. miR-3223p inhibitors were microinjected into a yak cumulus oocyte complex to determine the effect on oocyte maturation. During meiotic maturation, miR-322 3p expression was upregulated in oocytes, with substantially higher levels in the MII stage relative to the GV and MI stages compared to the GV and MI stages, though the opposite pattern of Dnmt1 expression was observed. DNMT1 expression in the ovarian follicles and corpus luteum differed between maturation stage-related variations in DNMT1 expression in the ovarian follicles and corpus luteum, according to immunohistochemistry results, with expression commonly present in cumulus cells and oocytes.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/rda.14119


microRNA expression levels in the nucleus accumbens correlate with morphine‐taking but not morphine‐seeking behaviour in male rats

In addition, previous research has concentrated on the consequences of early abstinence, but no further investigation has been made into long-term drug-induced processes that occur after prolonged abstinence. In a rat model of morphine self-administration, we showed that 30 days of coerced abstinence resulted in a time-dependent rise in morphine seeking. During early abstinence, early abstinence negatively correlated with increased lever pressing in both cue-exposed and cuenave animals, which was negatively associated with active lever pressing. After a relapse test during late abstinence, a mir1298-5p positively related to opioid use in drug SA history, in a relapse test during late abstinence. After abstinence, there was a clear correlation of target gene mRNA and mir32:5p. Following morphine SA's use, these results show that long-term regulation of miRNA expression is linked to drug intake. In addition, we find that the miRNA profile has changed from early to late abstinence and miRNA expression, which may reveal past drug use.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/ejn.15650

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions