Nano-realgar suppresses lung cancer stem cell growth by repressing metabolic reprogramming
| Autor: | Yu-feng Zhao, Li Huijie, Chang-yang Li, Fei-ran Yang, Xi-wen Hu, Xiao-dan Yu, Xiu-rong Li, Zong-kai Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Male Lung Neoplasms Cell Survival Antineoplastic Agents Biology Sulfides Arsenicals Cell Line 03 medical and health sciences Mice Phosphatidylinositol 3-Kinases 0302 clinical medicine Cancer stem cell Genetics Animals Humans MTT assay Viability assay AC133 Antigen Protein kinase B PI3K/AKT/mTOR pathway Cell Proliferation Mice Inbred BALB C TOR Serine-Threonine Kinases General Medicine Cell sorting Hypoxia-Inducible Factor 1 alpha Subunit Xenograft Model Antitumor Assays Gene Expression Regulation Neoplastic 030104 developmental biology Glucose A549 Cells 030220 oncology & carcinogenesis Cancer research Neoplastic Stem Cells Nanoparticles Stem cell Reprogramming |
| Zdroj: | Gene. 788 |
| ISSN: | 1879-0038 |
| Popis: | Background Recent studies in cancer biology suggest that metabolic glucose reprogramming is a potential target for cancer treatment. However, little is known about drug intervention in the glucose metabolism of cancer stem cells (CSCs) and its related underlying mechanisms. Methods The crude realgar powder was Nano-grinded to meets the requirements of Nano-pharmaceutical preparations, and Nano-realgar solution (NRS) was prepared for subsequent experiments. Isolation and characterization of lung cancer stem cells (LCSCs) was performed by magnetic cell sorting (MACS) and immunocytochemistry, respectively. Cell viability and intracellular glucose concentration were detected by MTT assay and glucose oxidase (GOD) kit. Protein expressions related to metabolic reprogramming was detected by ELISA assay. Determination of the expression of HIF-1α and PI3K/Akt/mTOR pathways was carried out by RT-PCR and western blotting analysis. A subcutaneous tumor model in BALB/c-nu mice was successfully established to evaluate the effects of Nano-realgar on tumor growth and histological structure, and the expression of HIF-1α in tumor tissues was measured by immunofluorescence. Results Nano-realgar inhibits cell viability and induces glucose metabolism in LCSCs, and inhibits protein expression related to metabolic reprogramming in a time- and dose-dependent manner. Nano-realgar downregulated the expression of HIF-1α and PI3K/Akt/mTOR pathways in vitro and in vivo. Nano-realgar inhibits tumor growth and changes the histological structure of tumors through in vivo experiments and consequently inhibits the constitutive activation of HIF-1α signaling. Conclusions These results reveal that Nano-realgar inhibits tumor growth in vitro and in vivo by repressing metabolic reprogramming. This inhibitory effect potentially related to the downregulation HIF-1α expression via PI3K/Akt/mTOR pathway. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect