Hsa_circ_0008537 facilitates liver carcinogenesis by upregulating MCL1 and Snail1 expression via miR‑153‑3p

Deficiency of circ_0103809 Attenuates Non-small Cell Lung Cancer Malignant Progression by Controlling miR-153-3p/HDAC1 Network

Circular RNAs are vital players in tumorigenesis. We held the purpose to investigate the role and mechanism of circ_0103809 in non-small cell lung cancer (NSCLC). The expressions of circ_0103809, miR-153-3p and HDAC1 mRNA were determined using quantitative real-time PCR assay, and HDAC1 protein was quantified using western blot analysis. MTT, EdU, flow cytometry, tube-formation, wound healing and tube-formation assays were conducted for functional analysis. The predicted relationship among circ_0103809, miR-153-3p and HDAC1 was ascertained using dual-luciferase analysis, RIP assay and pull-down analysis. Animal models were further constructed to realize circ_0103809's role in vivo. Circ_0103809 was upregulated NSCLC specimens, cells and serum-derived exosomes. Serum exosomal circ_0103809 had the potency to be a diagnostic biomarker for NSCLC. Circ_0103809 silencing inhibited NSCLC cell growth, metastasis and angiogenesis and triggered cell cycle arrest and apoptosis. Circ_0103809 deficiency also suppressed the growth of transplanted tumors. Circ_0103809 acted as the miR-153-3p sponge, and the biological effects of circ_0103809 knockdown were relieved by miR-153-3p inhibition. HDAC1 was directly targeted by miR-153-3p, and miR-153-3p enrichment inhibited NSCLC cell malignant phenotypes by sequestering HDAC1. Circ_0103809 knockdown repressed NSCLC malignant progression partly by regulating miR-153-3p/HDAC1 signaling.

Hsa_circ_0072765 knockdown inhibits proliferation, activation and migration in transforming growth factor-beta (TGF-β)-induced hepatic stellate cells (HSCs) by the miR-197-3p/TRPV3 axis

BACKGROUND

Circular RNAs (circRNAs) participate in the progression of diverse human diseases. However, the effects of circRNAs on liver fibrosis are limited. In this study, we aimed to investigate the functions of hsa_circ_0072765 in liver fibrosis.

METHODS

Transforming growth factor-beta (TGF-β)-treated hepatic stellate cells (HSCs) were used as the cell model of liver fibrosis. Quantitative real-time polymerase chain reaction (qRT-PCR) or western blot was performed to determine the expression of hsa_circ_0072765, microRNA-197-3p (miR-197-3p) and transient receptor potential cation channel subfamily V member 3 (TRPV3). 5'-ethynyl-2'-deoxyuridine (EdU) assay, flow cytometry analysis and wound-healing assay were conducted to evaluate cell proliferation, cell cycle and migration. HSC activation was assessed by determining the expression of alpha-smooth muscle actin (α-SMA) and type I collagen alpha 1 (Col1A1). Dual-luciferase reporter assay and RNA immunoprecipitation (RIP) were manipulated to analyze the relationship of hsa_circ_0072765, miR-197-3p and TRPV3. The exosome morphology was observed under transmission electron microscopy (TEM).

RESULTS

Hsa_circ_0072765 level was increased in TGF-β-induced HSCs. Hsa_circ_0072765 knockdown inhibited cell proliferation, cell cycle, activation and migration in TGF-β-induced HSCs. Hsa_circ_0072765 sponged miR-197-3p and negatively regulated miR-197-3p expression. MiR-197-3p inhibition reversed the effects of hsa_circ_0072765 knockdown on TGF-β-induced HSC proliferation, cell cycle, activation and migration. In addition, TRPV3 was the target gene of miR-197-3p and miR-197-3p overexpression inhibited TGF-β-treated HSC proliferation, cell cycle, activation and migration by targeting TRPV3. Besides, we found that exosomal hsa_circ_0072765 was increased in TGF-β-treated HSCs.

CONCLUSION

Hsa_circ_0072765 promoted the progression of TGF-β-treated HSCs by decoying miR-197-3p and upregulating TRPV3.

A comprehensive review on miR-153: Mechanistic and controversial roles of miR-153 in tumorigenicity of cancer cells

miRNAs play a crucial role in regulating genes involved in cancer progression. Recently, miR-153 has been mainly well-known as a tumor suppressive miRNA modulating genes in proliferation, metastasis, EMT, angiogenesis and drug resistance ability of a variety types of cancer. Mechanistic activity of miR-153 in tumorigenicity has not been fully reviewed. This manuscript presents a comprehensive review on the tumor suppressive activity of miR-153 as well as introducing the controversial role of miR-153 as an oncogenic miRNA in cancer. Furthermore, it summarizes all potential non-coding RNAs such as long non-coding RNAs (LncRNAs), transcribed ultra-conserved regions (T-UCRs) and circular RNAs (CircRNAs) targeting and sponging miR-153. Understanding the critical role of miR-153 in cell growth, metastasis, angiogenesis and drug resistance ability of cancer cells, suggests miR-153 as a potential prognostic biomarker for detecting cancer as well as providing a novel treatment strategy to combat with several types of cancer.