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Fructose vs. glucose: modulating stem cell growth and function through sugar supplementation.
Salaheldeen Elsaid1, Xiangdong Wu1, Sui Seng Tee1
1Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.
FEBS Open Bio
|June 26, 2024
Summary
Fructose, unlike glucose, stresses stem cells, reducing proliferation and altering cytokine production. It also fails to induce adipocyte differentiation, suggesting alternative cellular responses like senescence and lipolysis.
Area of Science:
- Stem cell biology
- Cellular metabolism
- Microenvironmental influences
Background:
- Stem cell function is critically dependent on microenvironmental factors like nutrient availability and oxygen levels.
- Variations in these resources across different organs influence stem cell potency and differentiation capacity.
Purpose of the Study:
- To investigate the differential effects of glucose versus fructose on stem cell growth, cytokine release, and differentiation.
- To examine the impact of varying oxygen tensions on these cellular processes.
Main Methods:
- Culturing human mesenchymal stem cells (hMSCs) and mouse fibroblasts under different conditions (glucose vs. fructose, varying oxygen tensions).
- Analyzing cell proliferation, cytokine production (including senescence-associated cytokines), and expression of adipogenesis markers (C/EBPβ, PPARγ).
Main Results:
- Replacing glucose with fructose induced cellular stress, evidenced by increased Hypoxia-Inducible Factor 1-alpha (Hif1α) expression and stability, leading to reduced cell proliferation.
- Fructose did not promote adipocyte differentiation in hMSCs or fibroblasts, despite upregulating key adipogenesis markers.
- Fructose-treated fibroblasts released senescence-associated cytokines (IL1α1, IL6, IL8, MCP1, TNF1α), indicating potential lipolysis.
Conclusions:
- Altering hexose type (glucose vs. fructose) and oxygen tension significantly stresses stem cells.
- Fructose metabolism in stem cells may trigger stress responses and senescence pathways rather than adipogenesis.
- Further research is needed to fully elucidate stem cell responses to microenvironmental cues.
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