MiR-30a-3p Targeting FLT1 Modulates Trophoblast Cell Proliferation in the Pathogenesis of Preeclampsia

MicroRNA-510-3p regulated vascular dysfunction in Preeclampsia by targeting Vascular Endothelial Growth Factor A (VEGFA) and its signaling axis

INTRODUCTION

Preeclampsia (PE) is a pregnancy complication associated with multi-organ damage and vascular dysfunction. Meanwhile, microRNAs or miRNAs are crucial regulators of gene expression in various diseases including PE. Our previous studies reported high expression of miR-510 in the PE patients' blood compared to normal. Hence, we hypothesize that miR-510-3p targets Vascular endothelial growth factor A (VEGFA) in the regulation of PI3K/AKT/eNOS/mTOR axis in PE and miR-510-3p could be a potential therapeutic target for PE.

METHODS

The proliferation, migration, and apoptosis of HTR8/SVNeo and BeWo cells were analyzed by manipulating the miR-510-3p and VEGFA expression. Similarly, the inhibition of miR-510-3p through anti-miR-510-3p was analyzed in PE rat models, and the biochemical, hemodynamic parameters, and histopathology were examined between the groups. Moreover, the expression of miR-510-3p and VEGFA/PI3K/AKT/eNOS/mTOR axis was analyzed using qRT-PCR and Western blot.

RESULTS

Significant changes were observed in the BP, proteinuria, and other biochemical parameters between PE and control rats. Our results suggest that miR-510-3p targets VEGFA leading to vascular dysfunction in PE, while treatment with anti-miR-510-3p in the PE-induced rat model exhibits a significant change in the expression of miR-510-3p/VEGFA/PI3K/AKT/eNOS/mTOR signaling where miR-510-3p showed lesser expression and vice versa with VEGFA. The gene and protein expression analysis revealed a significant correlation between miR-510-3p and the VEGFA signaling axis in PE.

DISCUSSION

Thus, our findings from in vitro and in vivo suggest miR-510-3p as a potential therapeutic target and anti-miR-510-3p as a novel therapeutic molecule for PE.

miRNA profiling of granulosa cell-derived exosomes reveals their role in promoting follicle development

To explore whether granulosa cell (GC)-derived exosomes (GC-Exos) and follicular fluid-derived exosomes (FF-Exos) have functional similarities in follicle development and to establish relevant experiments to validate whether GC-Exos could serve as a potential substitute for follicular fluid-derived exosomes to improve folliculogenesis. GC-Exos were characterized. MicroRNA (miRNA) profiles of exosomes from human GCs and follicular fluid were analyzed in depth. The signature was associated with folliculogenesis, such as phosphatidylinositol 3 kinases-protein kinase B signal pathway, mammalian target of rapamycin signal pathway, mitogen-activated protein kinase signal pathway, Wnt signal pathway, and cyclic adenosine monophosphate signal pathway. A total of five prominent miRNAs were found to regulate the above five signaling pathways. These miRNAs include miRNA-486-5p, miRNA-10b-5p, miRNA-100-5p, miRNA-99a-5p, and miRNA-21-5p. The exosomes from GCs and follicular fluid were investigated to explore the effect on folliculogenesis by injecting exosomes into older mice. The proportion of follicles at each stage is counted to help us understand folliculogenesis. Exosomes derived from GCs were isolated successfully. miRNA profiles demonstrated a remarkable overlap between the miRNA profiles of FF-Exos and GC-Exos. The shared miRNA signature exhibited a positive influence on follicle development and activation. Furthermore, exosomes derived from GCs and follicular fluid promoted folliculogenesis in older female mice. Exosomes derived from GCs had similar miRNA profiles and follicle-promoting functions as follicular fluid exosomes. Consequently, GC-Exos are promising for replacing FF-Exos and developing new commercial reagents to improve female fertility.

Knockdown of lncRNA SNHG16 Attenuates the Proliferation and Radioresistance of Nasopharyngeal Carcinoma Cells by Mediating miR-31-5p/SFN Axis

Nasopharyngeal carcinoma (NPC) is a rare head and neck tumor that threatens people's health. Radiotherapy is a major treatment for NPC, however, radioresistance of the NPC cells may contribute to treatment failure. LncRNA SNHG16 was upregulated in NPC; however, the function of SNHG16 in radioresistant NPC cells remains unexplored. RT-qPCR was applied for detecting SNHG16, miR-31-5p and SFN levels. MTT assay and colony formation assay were applied to assess the cell viability and proliferation. Dual luciferase was applied for assessing the relation among SNHG16, miR-31-5p and SFN. SFN level in NPC cells was examined by Western blot. The level of SNHG16 and SFN in NPC cells was significantly upregulated by exposure to radiation. In addition, silencing of SNHG16 or miR-31-5p mimics notably attenuated radioresistance of NPC cells. SNHG16 could positively regulate the expression of SFN in NPC cells through binding with miR-31-5p. Furthermore, SNHG16 downregulation obviously attenuated the proliferation and radioresistance of NPC cells by regulation of miR-31-5p/SFN axis. Knockdown of lncRNA SNHG16 attenuates radioresistance of nasopharyngeal carcinoma cells by miR-31-5p/SFN axis. Thus, our research data show a novel method for improving the efficacy of radiotherapy for NPC.