open access

Vol 74, No 3 (2023)
Original paper
Submitted: 2022-10-18
Accepted: 2022-12-06
Published online: 2023-05-08
Get Citation

MicroRNA-646 inhibits the proliferation of ovarian granulosa cells via insulin-like growth factor 1 (IGF-1) in polycystic ovarian syndrome (PCOS)

Jiali Lu1, Feilan Xuan2, Aixue Chen3, Ruiying Jin4, Weimei Zhou4, Yongju Ye5, Yuefang Ren1
·
Pubmed: 37155307
·
Endokrynol Pol 2023;74(3):305-314.
Affiliations
  1. Department of Gynaecology, Huzhou Maternity and Child Health Care Hospital, Huzhou, China
  2. Department of Obstetrics and Gynaecology, Hangzhou Traditional Chinese Medical Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
  3. Department of Gynaecology, Changxing People’s Hospital of Chongming District, Shanghai, China
  4. Department of Ultrasound, Jiaojiang Maternal and Child Health Hospital, Taizhou, China
  5. Department of Gynaecology, Lishui Hospital of Traditional Chinese Medicine, Lishui, China

open access

Vol 74, No 3 (2023)
Original Paper
Submitted: 2022-10-18
Accepted: 2022-12-06
Published online: 2023-05-08

Abstract

Introduction: Polycystic ovarian syndrome (PCOS) is a common endocrinopathy in women. MicroRNAs (miRNAs) have been proven to play a crucial role in balancing the proliferation and apoptosis of granulosa cells (GCs) in PCOS.

Material and methods: The miRNA of PCOS was screened by bioinformatics analysis, and microRNA 646 (miR-646) was found to be involved in insulin-related pathways by enrichment analysis. The cell counting kit-8 (CCK-8), cell colony formation, and the 5-ethynyl-2’-deoxyuridine (EdU) assays were used to explore the effect of miR-646 on proliferation of GCs, flow cytometry was used to measure the cell cycle and apoptosis, and Western blot and quantitative real-time polymerase chain reaction (qRT-PCR) were used to explore the biological mechanism of miR-646. The human ovarian granulosa cells KGN were selected by measuring the miR-646 and via insulin-like growth factor 1 (IGF-1) levels and used for cell transfection.

Results: Overexpressed miR-646 inhibited KGN cell proliferation, and silenced miR-646 advanced it. Most cells were arrested in the S phase of cell cycle with overexpressed-miR-646, while after silencing miR-646, cells were arrested in the G2/M phase. And the miR-646 mimic raised apoptosis in KGN cells. Also, a dual-luciferase reporter proved the regulation effect of miR-646 on IGF-1, miR-646 mimic inhibited IGF-1, and miR-646 inhibitor advanced IGF-1. The cyclin D1, cyclin-dependent kinase 2 (CDK2), and B-cell CLL/lymphoma 2 (Bcl-2) levels were inhibited with overexpressed-miR-646, while silenced-miR-646 promoted their expression, and the bcl-2-like protein 4 (Bax) level was the opposite. This study found that silenced-IGF1 antagonized the promotive effect of the miR-646 inhibitor on cell proliferation.

Conclusions: MiR-646 inhibitor treatment can promote the proliferation of GCs by regulating the cell cycle and inhibiting apoptosis, while silenced-IGF-1 antagonizes it.

Abstract

Introduction: Polycystic ovarian syndrome (PCOS) is a common endocrinopathy in women. MicroRNAs (miRNAs) have been proven to play a crucial role in balancing the proliferation and apoptosis of granulosa cells (GCs) in PCOS.

Material and methods: The miRNA of PCOS was screened by bioinformatics analysis, and microRNA 646 (miR-646) was found to be involved in insulin-related pathways by enrichment analysis. The cell counting kit-8 (CCK-8), cell colony formation, and the 5-ethynyl-2’-deoxyuridine (EdU) assays were used to explore the effect of miR-646 on proliferation of GCs, flow cytometry was used to measure the cell cycle and apoptosis, and Western blot and quantitative real-time polymerase chain reaction (qRT-PCR) were used to explore the biological mechanism of miR-646. The human ovarian granulosa cells KGN were selected by measuring the miR-646 and via insulin-like growth factor 1 (IGF-1) levels and used for cell transfection.

Results: Overexpressed miR-646 inhibited KGN cell proliferation, and silenced miR-646 advanced it. Most cells were arrested in the S phase of cell cycle with overexpressed-miR-646, while after silencing miR-646, cells were arrested in the G2/M phase. And the miR-646 mimic raised apoptosis in KGN cells. Also, a dual-luciferase reporter proved the regulation effect of miR-646 on IGF-1, miR-646 mimic inhibited IGF-1, and miR-646 inhibitor advanced IGF-1. The cyclin D1, cyclin-dependent kinase 2 (CDK2), and B-cell CLL/lymphoma 2 (Bcl-2) levels were inhibited with overexpressed-miR-646, while silenced-miR-646 promoted their expression, and the bcl-2-like protein 4 (Bax) level was the opposite. This study found that silenced-IGF1 antagonized the promotive effect of the miR-646 inhibitor on cell proliferation.

Conclusions: MiR-646 inhibitor treatment can promote the proliferation of GCs by regulating the cell cycle and inhibiting apoptosis, while silenced-IGF-1 antagonizes it.

Get Citation

Keywords

polycystic ovarian syndrome; granulosa cells; microRNA; miR-646; IGF1; KGN cells

About this article
Title

MicroRNA-646 inhibits the proliferation of ovarian granulosa cells via insulin-like growth factor 1 (IGF-1) in polycystic ovarian syndrome (PCOS)

Journal

Endokrynologia Polska

Issue

Vol 74, No 3 (2023)

Article type

Original paper

Pages

305-314

Published online

2023-05-08

Page views

1499

Article views/downloads

441

DOI

10.5603/EP.a2023.0020

Pubmed

37155307

Bibliographic record

Endokrynol Pol 2023;74(3):305-314.

Keywords

polycystic ovarian syndrome
granulosa cells
microRNA
miR-646
IGF1
KGN cells

Authors

Jiali Lu
Feilan Xuan
Aixue Chen
Ruiying Jin
Weimei Zhou
Yongju Ye
Yuefang Ren

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