Up-regulated lncRNA AFAP1-AS1 indicates a poor prognosis and promotes carcinogenesis of breast cancer.


Journal

Breast cancer (Tokyo, Japan)
ISSN: 1880-4233
Titre abrégé: Breast Cancer
Pays: Japan
ID NLM: 100888201

Informations de publication

Date de publication:
Jan 2019
Historique:
received: 02 03 2018
accepted: 02 07 2018
pubmed: 6 7 2018
medline: 17 4 2019
entrez: 6 7 2018
Statut: ppublish

Résumé

Long noncoding RNAs (lncRNAs) have been reported to play crucial roles in breast cancer. This study aimed to determine the clinical significance and biological functions of lncRNA AFAP1-AS1 in breast cancer. The expression of AFAP1-AS1 in breast cancer tissue and adjacent normal tissue from 160 patients and breast cancer cell lines were determined by qRT-PCR. The clinical characteristics of patients were collected to analyse the correlation between AFAP1-AS1 expression and malignancy status. Kaplan-Meier and Cox proportional hazards model were used to analyze whether AFAP1-AS1 expression impacted prognosis. To assess the effect of AFAP1-AS1 on MCF-7 cells proliferation, cell viability, EdU incorporation and colony formation assays were conducted after AFAP1-AS1 knockdown by siRNA. The apoptosis was detected by Caspase-3 activity, cell cycle analysis, Bcl-2 and Bax protein expression. Wound scratch assay and EMT-related protein expression (E-cadherin, N-cadherin and Vimentin) were conducted to evaluate the metastasis ability. To further determine the effect of AFAP1-AS1 on AFAP1, the mRNA and protein expression of AFAP1 and subsequent actin filament integrity were measured after AFAP1-AS1 knockdown. The expression of AFAP1-AS1 was up-regulated in human breast cancer tissue and associated with malignancy status, high expression of AFAP1-AS1 had a poor prognosis in breast cancer patients. AFAP1-AS1 expression was up-regulated in 4 breast cancer cell lines (MCF-7, SK-RB-3, MDA-MB-231and MDA-MB-468) compared with normal breast cell line HBL-100. MCF-7, the most up-regulation cancer cell, was used for following studies. AFAP1-AS1 knockdown can inhibit the proliferation, metastasis and promote apoptosis of MCF-7. However, the AFAP1 expression and actin filament integrity was not affected after AFAP1-AS1 knockdown. Up-regulated lncRNA AFAP1-AS1 indicates a poor prognosis in breast cancer patients and regulated the breast cancer cells proliferation, apoptosis and metastasis.

Sections du résumé

BACKGROUND BACKGROUND
Long noncoding RNAs (lncRNAs) have been reported to play crucial roles in breast cancer. This study aimed to determine the clinical significance and biological functions of lncRNA AFAP1-AS1 in breast cancer.
METHODS METHODS
The expression of AFAP1-AS1 in breast cancer tissue and adjacent normal tissue from 160 patients and breast cancer cell lines were determined by qRT-PCR. The clinical characteristics of patients were collected to analyse the correlation between AFAP1-AS1 expression and malignancy status. Kaplan-Meier and Cox proportional hazards model were used to analyze whether AFAP1-AS1 expression impacted prognosis. To assess the effect of AFAP1-AS1 on MCF-7 cells proliferation, cell viability, EdU incorporation and colony formation assays were conducted after AFAP1-AS1 knockdown by siRNA. The apoptosis was detected by Caspase-3 activity, cell cycle analysis, Bcl-2 and Bax protein expression. Wound scratch assay and EMT-related protein expression (E-cadherin, N-cadherin and Vimentin) were conducted to evaluate the metastasis ability. To further determine the effect of AFAP1-AS1 on AFAP1, the mRNA and protein expression of AFAP1 and subsequent actin filament integrity were measured after AFAP1-AS1 knockdown.
RESULTS RESULTS
The expression of AFAP1-AS1 was up-regulated in human breast cancer tissue and associated with malignancy status, high expression of AFAP1-AS1 had a poor prognosis in breast cancer patients. AFAP1-AS1 expression was up-regulated in 4 breast cancer cell lines (MCF-7, SK-RB-3, MDA-MB-231and MDA-MB-468) compared with normal breast cell line HBL-100. MCF-7, the most up-regulation cancer cell, was used for following studies. AFAP1-AS1 knockdown can inhibit the proliferation, metastasis and promote apoptosis of MCF-7. However, the AFAP1 expression and actin filament integrity was not affected after AFAP1-AS1 knockdown.
CONCLUSION CONCLUSIONS
Up-regulated lncRNA AFAP1-AS1 indicates a poor prognosis in breast cancer patients and regulated the breast cancer cells proliferation, apoptosis and metastasis.

Identifiants

pubmed: 29974352
doi: 10.1007/s12282-018-0891-3
pii: 10.1007/s12282-018-0891-3
doi:

Substances chimiques

AFAP1-AS1 long noncoding RNA, human 0
Biomarkers, Tumor 0
RNA, Long Noncoding 0
RNA, Small Interfering 0

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

74-83

Auteurs

Dachang Ma (D)

Department of Galactophore, The First Hospital of Lanzhou University, No. 1 West Donggang Road, Lanzhou, 730000, Gansu, People's Republic of China. dcmalzu@sina.com.

Cheng Chen (C)

Department of Galactophore, The First Hospital of Lanzhou University, No. 1 West Donggang Road, Lanzhou, 730000, Gansu, People's Republic of China.

Jun Wu (J)

Department of Galactophore, The First Hospital of Lanzhou University, No. 1 West Donggang Road, Lanzhou, 730000, Gansu, People's Republic of China.

Honglei Wang (H)

Department of Galactophore, The First Hospital of Lanzhou University, No. 1 West Donggang Road, Lanzhou, 730000, Gansu, People's Republic of China.

Duoming Wu (D)

Department of Galactophore, The First Hospital of Lanzhou University, No. 1 West Donggang Road, Lanzhou, 730000, Gansu, People's Republic of China.

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Classifications MeSH