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Research article
Shui-Hong Zhou
Zhejiang University, College of Medicine ,TheFirst Affiliated Hospital
Corresponding Author
ORCiD: https://orcid.org/0000-0002-7163-2289
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This work is licensed under a CC BY 4.0 License. Read Full License
Background: Enhanced glucose uptake and autophagy are means by which cells adapt to stressful microenvironments. We investigated the roles of glucose transporter-1 (GLUT-1) and autophagy in laryngeal carcinoma stem cells under hypoxic and low-glucose conditions.
Methods: CD133+ Tu212 laryngeal carcinoma stem cells were purified by magnetic-activated cell sorting and subjected to hypoxic and/or low-glucose conditions. Proliferation was evaluated using a cell-counting kit and a clone-formation assay, and migration was evaluated through a Transwell assay. Autophagy was assessed via transmission electron microscopy. GLUT-1 and beclin-1 expression were silenced using an shRNA and autophagy was manipulated using rapamycin, 3-MA, or chloroquine. Gene expression levels were evaluated by quantitative reverse transcription-polymerase chain reaction and protein concentrations were assessing via Western blotting.
Results: Compared to CD133– stem cells, CD133+ cells showed increased proliferation and migration, and reduced apoptosis, under hypoxic or low-glucose conditions. They also showed increased expression of GLUT-1 and autophagy markers. Finally, GLUT-1 knockdown or autophagy inhibition reduced their proliferation and migration.
Conclusions: Enhanced glucose uptake and autophagy maintain the functions of CD133+ laryngeal carcinoma stem cells under hypoxic and low-glucose conditions.
Keywords
Laryngeal carcinoma, cancer stem cell, CD133+ cell, GLUT-1, autophagy
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This is a preprint. It has not completed peer review.
Research article
Shui-Hong Zhou
Zhejiang University, College of Medicine ,TheFirst Affiliated Hospital
Corresponding Author
ORCiD: https://orcid.org/0000-0002-7163-2289
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 10 Aug, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background: Enhanced glucose uptake and autophagy are means by which cells adapt to stressful microenvironments. We investigated the roles of glucose transporter-1 (GLUT-1) and autophagy in laryngeal carcinoma stem cells under hypoxic and low-glucose conditions.
Methods: CD133+ Tu212 laryngeal carcinoma stem cells were purified by magnetic-activated cell sorting and subjected to hypoxic and/or low-glucose conditions. Proliferation was evaluated using a cell-counting kit and a clone-formation assay, and migration was evaluated through a Transwell assay. Autophagy was assessed via transmission electron microscopy. GLUT-1 and beclin-1 expression were silenced using an shRNA and autophagy was manipulated using rapamycin, 3-MA, or chloroquine. Gene expression levels were evaluated by quantitative reverse transcription-polymerase chain reaction and protein concentrations were assessing via Western blotting.
Results: Compared to CD133– stem cells, CD133+ cells showed increased proliferation and migration, and reduced apoptosis, under hypoxic or low-glucose conditions. They also showed increased expression of GLUT-1 and autophagy markers. Finally, GLUT-1 knockdown or autophagy inhibition reduced their proliferation and migration.
Conclusions: Enhanced glucose uptake and autophagy maintain the functions of CD133+ laryngeal carcinoma stem cells under hypoxic and low-glucose conditions.
Figure 1
Figure 2
Figure 3
Figure 4
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