Holliday junction recognition protein promotes pancreatic cancer growth and metastasis via modulation of the MDM2/p53 signaling
Autor: | Hai-Yan Ding, Guo-Qing Zhang, Ping Shi, Chenjing Wang, Yanping Liu, Yunshan Wang, Xin Li, Yu Cao, Ting Li, Ping-Ping Lin |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
0301 basic medicine
Cancer Research endocrine system diseases Immunology Article Metastasis Small hairpin RNA 03 medical and health sciences Cellular and Molecular Neuroscience Histone H3 0302 clinical medicine Cell Movement Pancreatic cancer Biomarkers Tumor medicine Humans Neoplasm Metastasis lcsh:QH573-671 Cell Proliferation DNA Cruciform biology Chemistry lcsh:Cytology Proto-Oncogene Proteins c-mdm2 Oncogenes Cell Biology medicine.disease Gene Expression Regulation Neoplastic Pancreatic Neoplasms 030104 developmental biology Cell culture 030220 oncology & carcinogenesis biology.protein Cancer research Mdm2 Tumor Suppressor Protein p53 Holliday junction recognition protein Chromatin immunoprecipitation Carcinoma Pancreatic Ductal |
Zdroj: | Cell Death and Disease, Vol 11, Iss 5, Pp 1-14 (2020) Cell Death & Disease |
ISSN: | 2041-4889 |
Popis: | Holliday junction recognition protein (HJURP) refers to a histone H3 chaperone that has been implicated in different kinds of malignancies. Yet, its character in pancreatic cancer remains unclear. The expression of HJURP was assessed in PDAC tissues by RT-qPCR, immunoblotting, and immunohistochemistry. HJURP-deficient or overexpressed PDAC cell lines were constructed, using shRNA or plasmids with HJURP insert. MTT, sphere formation assay, migration, and invasion assays were performed to evaluate the viability, proliferation, migration, and invasion of PDAC cells. We used xenograft mice models to assess the tumor growth and metastasis in vivo. RNA-seq was applicated in search of the potential downstream target of HJURP in PDAC and subsequent verification were fulfilled via multiple assays, including immunofluorescence. Additionally, chromatin immunoprecipitation and luciferase reporter assay were conducted to explore the potential regulation of MDM2 expression by HJURP through H3K4me2. In this current research, we found that the expression of HJURP in PDAC cells and tissue was significantly higher than those of adjacent normal tissue, and high HJURP expression predicted poor survival. HJURP significantly promoted the viability, sphere formation, migration, and invasion of PDAC cells in vitro, HJURP also facilitated tumor growth and metastasis in vivo. Mechanically, MDM2/p53 axis is critical for HJURP-mediated malignant behaviors in PDAC, and HJURP regulates MDM2 expression through H3K4me2. HJURP could serve as a promising biomarker, and target for PDAC prognosis and treatment. |
Databáze: | OpenAIRE |
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