Hypoxia Promotes Pancreatic Cancer Cell Dedifferentiation to Stem-Like Cell Phenotypes With High Tumorigenic Potential by the HIF-1α/Notch Signaling Pathway
| Autor: | Dan Tang, Zhou Yu, Kui Tu, Yong-Kang Zou, Rui Mu, Lijin Zhao, Dian-Bei Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
Endocrinology Diabetes and Metabolism Cell Notch signaling pathway Mice Nude 03 medical and health sciences Chemokine receptor 0302 clinical medicine Endocrinology Cell Movement Cell Line Tumor Internal Medicine medicine Animals Humans Gene silencing Neoplasm Invasiveness Receptor Notch1 Aged Hepatology biology Chemistry CD44 Transfection Cell Dedifferentiation Hypoxia-Inducible Factor 1 alpha Subunit Cell biology Gene Expression Regulation Neoplastic Pancreatic Neoplasms Phenotype medicine.anatomical_structure Cell culture Apoptosis 030220 oncology & carcinogenesis Neoplastic Stem Cells biology.protein Tumor Hypoxia Female 030211 gastroenterology & hepatology Signal Transduction |
| Zdroj: | Pancreas. 50:756-765 |
| ISSN: | 1536-4828 0885-3177 |
| DOI: | 10.1097/mpa.0000000000001828 |
| Popis: | Objectives This study aimed to investigate the effect and mechanism of hypoxia on pancreatic cancer (PC) cell dedifferentiation and tumorigenic potential. Methods Inhibition of hypoxia-inducible factor 1α (HIF-1α) and overexpression of Notch1 in PC HS766T cell lines were by lentiviral transfection. The expression of stem cell-specific markers C-X-C motif chemokine receptor 4, CD44, and Nestin was detected by immunofluorescence and Western blot assays. Cell invasion capacity was examined by Transwell assay. Tumorigenic potential was measured in an in situ tumor transplantation experiment. The expression of HIF-1α, Notch signals, and apoptosis signals was examined by Western blot assay. Results Hypoxia promoted PC cells to dedifferentiate into stem-like cells by upregulating HIF-1α and activating Notch signals. Silencing of HIF-1α significantly repressed cell dedifferentiation and invasion, whereas overexpression of Notch1 reversed the effect of HIF-1α repression. In situ tumor transplantation experiment further confirmed that hypoxia promoted tumorigenic ability through upregulating HIF-1α. Moreover, the expression of HIF-1α and Notch1 was significantly increased in human PC tissues, and high expression of HIF-1α was correlated with poor survival rate. Conclusions Hypoxia promoted PC cell dedifferentiation to stem-like cell phenotypes with high tumorigenic potential by activating HIF-1α/Notch signaling pathway, indicating a novel role in regulating PC progression. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|