Down-regulation of HPGD by miR-146b-3p promotes cervical cancer cell proliferation, migration and anchorage-independent growth through activation of STAT3 and AKT pathways.

Abstract

While the application of early screening and HPV vaccines has reduced the incidence and mortality rates of cervical cancer, it remains the third most common carcinoma and fourth leading cause of cancer-associated death among women worldwide. The precise mechanisms underlying progression of cervical cancer are not fully understood at present. Here, we detected significant down-regulation of 15-hydroxyprostaglandin dehydrogenase (HPGD) in cervical cancer tissues. Overexpression of HPGD inhibited cervical cancer cell proliferation, migration and anchorage-independent growth to a significant extent. To clarify the mechanisms underlying HPGD down-regulation in cervical cancer, miRNA microarray, bioinformatics and luciferase reporter analyses were performed. HPGD was identified as a direct target of miR-146b-3p displaying up-regulation in cervical cancer tissues. Similar to the effects of HPGD overexpression, down-regulation of miR-146b-3p strongly suppressed proliferation, migration and anchorage-independent growth of cervical cancer cells. Furthermore, HPGD negatively regulated activities of STAT3 and AKT that promote cervical cancer cell proliferation. Notably, HPV oncogenes E6 and E7 were determined as potential contributory factors to these alterations. Our results collectively suggest that the HPGD/miR-146b-3p axis plays a significant role in cervical cancer and may serve as a potentially effective therapeutic target.

• Authors: Shuihong Yao, Jingyun Xu, Kaixuan Zhao, Pengxia Song, Qin Yan, Weifei Fan, Wan Li, Chun Lu
• Journal: Cell death & disease (Cell Death Dis) Vol. 9 Issue 11 Pg. 1055 (10 17 2018) ISSN: 2041-4889 [Electronic] England
• PMID: 30333561 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• E6 protein, Human papillomavirus type 16
• MIRN146 microRNA, human
• MicroRNAs
• Oncogene Proteins, Viral
• Papillomavirus E7 Proteins
• Repressor Proteins
• STAT3 Transcription Factor
• STAT3 protein, human
• oncogene protein E7, Human papillomavirus type 16
• Hydroxyprostaglandin Dehydrogenases
• 15-hydroxyprostaglandin dehydrogenase
• Proto-Oncogene Proteins c-akt

Topics

• Base Sequence
• Cell Line, Tumor
• Cell Movement
• Cell Proliferation
• Disease Progression
• Female
• Gene Expression Regulation, Neoplastic
• HEK293 Cells
• HeLa Cells
• Host-Pathogen Interactions (genetics)
• Human papillomavirus 16 (genetics, pathogenicity)
• Human papillomavirus 18 (genetics, pathogenicity)
• Humans
• Hydroxyprostaglandin Dehydrogenases (genetics, metabolism)
• MicroRNAs (genetics, metabolism)
• Oncogene Proteins, Viral (genetics, metabolism)
• Papillomavirus E7 Proteins (genetics, metabolism)
• Papillomavirus Infections (genetics, metabolism, pathology, virology)
• Proto-Oncogene Proteins c-akt (genetics, metabolism)
• Repressor Proteins (genetics, metabolism)
• STAT3 Transcription Factor (genetics, metabolism)
• Signal Transduction
• Uterine Cervical Neoplasms (genetics, metabolism, pathology, virology)