An Artificial Intelligent Signal Amplification System for in vivo Detection of miRNA

Functional mechanism and clinical implications of mir-1271-5p in pilon fracture healing processes

BACKGROUND

Pilon fractures are challenging to treat and carry a risk of delayed healing. MicroRNA (miRNA) is closely associated with various diseases due to its ability to regulate gene expression. Consequently, this study aimed to examine the connection between miR-1271-5p expression levels and pilon fracture healing processes, while also exploring the underlying mechanisms. The objective of this research was to provide valuable insights for the future clinical treatment of pilon fractures.

MATERIALS

Venous blood samples were obtained for RNA extraction from patients with normal healing (n = 107) or delayed healing (n = 45) of pilon fractures. The expression levels of miR-1271-5p were measured using qRT-PCR. MiR-1271-5p and ZBTB7A biological functions in MC3T3-E1 cells were examined using the Cell Counting Kit-8 (CCK-8), flow cytometry, and qRT-PCR. Finally, an investigation into the underlying mechanisms was carried out using a dual luciferase reporter assay.

RESULTS

This study found that, compared to those who healed normally, patients who experienced delayed healing of pilon fractures had significantly higher expression of miR-1271-5p. This suggests that miR-1271-5p may be an indicator for delayed healing in pilon fractures. Moreover, the upregulation of miR-1271-5p may result in a reduction of ZBTB7A expression, which is thought to mediate the effects of miR-1271-5p on MC3T3-E1 cell activities.

CONCLUSIONS

MiR-1271-5p was involved in the healing processes of pilon fractures via targeting ZBTB7A. MiR-1271-5p was a possible target for the therapy of pilon fractures.

Inhibiting of circ-TLK1 inhibits the progression of glioma through down-regulating PANX1 via targeting miR-17-5p

Glioma remains the most common malignant tumors in the central nervous system and often has poor prognosis. In recent years, it has been gradually revealed that non-coding RNA effects glioma progression. In this study, we aimed to investigate the significance of circular RNA TLK1 (Circ-TLK1) in predicting the survival of glioma patients as well as its role in glioma development via both in-vitro and in-vivo experiments. We found that Circ-TLK1 was conspicuously up-regulated in glioma tissues compared with adjacent normal tissues, and the up-regulated Circ-TLK1 was significantly correlated with glioma patients' larger tumor volume and higher grades. Functionally, Circ-TLK1 over-expression facilitated glioma growth, migration and invasion, inhibited cell apoptosis, and accelerated PANX1/MAPK/ERK expression, while Circ-TLK1 low expression had the opposite effects. In addition, bioinformatics analysis showed that miR-17-5p was a potential target of Circ-TLK1 and targeted at PANX1. Furthermore, through dual luciferase viability assay, Circ-TLK1 acted as a competing endogenous RNA by sponging miR-17-5p, which targeted and inhibited PANX1/MAPK/ERK expression. MiR-17-5p overexpression mitigated glioma progression, which was significantly inhibited with Circ-TLK1 upregulation. In conclusion, this study confirmed a novel axis of Circ-TLK1-miR-17-5p-PANX1 in modulating glioma development, providing more references for glioma diagnosis and targeted therapy.