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J Cell Mol Med. 2018 Jan;22(1):655-667. doi: 10.1111/jcmm.13351. Epub 2017 Oct 5.

Linc00511 acts as a competing endogenous RNA to regulate VEGFA expression through sponging hsa-miR-29b-3p in pancreatic ductal adenocarcinoma.

Zhao X1,2, Liu Y1,2, Li Z2,3, Zheng S2,4, Wang Z5, Li W2,3, Bi Z1,2, Li L1,2, Jiang Y1,2, Luo Y2,4, Lin Q2,4, Fu Z2,4, Rufu C2,4.

Author information

1
Department of Radiotherapy, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
2
Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong higher Education Institutes, Sun Yat-Sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
3
Department of Medical Oncology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
4
Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Guangzhou, China.
5
Department of Nephrology, Armed Police Corps Hospital of Guangdong Province, Guangdong, China.

Abstract

Pancreatic ductal adenocarcinoma (PDAC) is a lethal malignancy. Long non-coding RNAs (lncRNAs) are important regulators in pathological processes, yet their potential roles in PDAC are poorly understood. Here, we identify a fundamental role for a novel lincRNA, linc00511, in the progression of PDAC. Linc00511 levels in PDAC tissue specimens and cell lines were examined by quantitative real-time PCR. Corresponding adjacent non-neoplastic tissues were used as controls. The function of linc00511 in PDAC cell lines was determined by RNA interference approach in vitro and in vivo. Fluorescence in situ hybridization (FISH) was used to characterize linc00511 expression in PDAC cells. Insights of the mechanism of competitive endogenous RNAs (ceRNAs) were obtained from bioinformatic analysis, luciferase assays and RIP assays. The association between the linc00511/hsa-miR29b-3p axis and VEGFA was verified by Western blotting assay. Immunohistochemistry was performed to evaluate the expression of VEGFA in PDAC samples. The aberrant up-regulation of linc00511 was detected in PDAC cell lines and patient specimens compared with controls. An increase in linc00511 expression indicates the adverse clinical pathological characteristics and poor prognosis. Functionally, linc00511 depletion in PDAC cells decreased proliferation, migration, invasion and endothelial tube formation. Mechanistically, linc00511 could up-regulate VEGFA via its competing endogenous RNA (ceRNA) activity on hsa-miR-29b-3p. In summary, our results define an important axis controlling proliferation, invasion and tumour angiogenesis in PDAC. Linc00511 is a novel lncRNA that plays a significant regulatory role in the pathogenesis and progression of PDAC. Thus, Linc00511 represents a new prognostic biomarker to predict clinical outcome of PDAC patients after surgery and may serve as a potential therapeutic target for PDAC treatment.

KEYWORDS:

VEGFA ; Competing endogenous RNA; Pancreatic ductal adenocarcinoma; hsa-miR-29b-3p; linc00511

PMID:
28984028
PMCID:
PMC5742682
DOI:
10.1111/jcmm.13351
[Indexed for MEDLINE]
Free PMC Article

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