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Updated: Mar 28, 2026
Assessment of the Immunomodulatory Properties of Human Mesenchymal Stem Cells MSCs
Published on: December 24, 2015
Cytotoxic effects of 4-methylimidazole on bone marrow mesenchymal stem cells in vitro
Fan Bu1, Tao Li1, Yanling Ding1
1School of Medicine, Jiangsu University 301 Xuefu Road, Zhenjiang, Jiangsu 212013, P.R. China.
Abstract:
4-Methylimidazole (4-MI) is found in a great number of food products. The National Toxicology Program (NTP) revealed that 4-MI is carcinogenic and can also cause anemia and weight loss. Mesenchymal stem cells (MSCs) are able to support hematopoiesis and migrate to the site of tumors. To investigate whether 4-MI has an impact on MSCs, we have measured the ability of cell (osteoblast, adipocyte) proliferation, apoptosis, cell cycle, gene expression, migration and differentiation between control group and the 4-MI group. The results showed that higher concentrations of 4-MI (≥150 μg/ml) had significant effects on BMSCs viability while lower concentrations (≤100 μg/ml) had no significant effects on cell proliferation, apoptosis, migration, differentiation, and expression of relevant marker genes of hematopoietic cytokines, including TPO, SCF, VEGF and FLt3. The results also indicated that 4-MI (≤100 μg/ml) may have no significant effect on the biological characteristics of MSCs. Low concentration of 4-MI in foods and beverages have no toxic effect on BMSCs. The anemia and weight loss of animals caused by 4-MI may not be due to its effect on BMSCs.
Insights
4-Methylimidazole (4-MI) at low concentrations does not significantly affect bone marrow mesenchymal stem cells (BMSCs). These findings suggest 4-MI
Area of Science:
- Toxicology
- Stem Cell Biology
- Biochemistry
Background:
- 4-Methylimidazole (4-MI) is a common food contaminant linked to carcinogenicity, anemia, and weight loss by the National Toxicology Program (NTP).
- Mesenchymal stem cells (MSCs) play crucial roles in supporting blood formation (hematopoiesis) and tumor microenvironment modulation.
- Understanding 4-MI's impact on MSCs is vital given their potential roles in health and disease.
Purpose of the Study:
- To investigate the effects of 4-Methylimidazole (4-MI) on the biological characteristics of bone marrow mesenchymal stem cells (BMSCs).
- To determine the concentration-dependent toxicity of 4-MI on BMSC viability, proliferation, apoptosis, cell cycle, migration, and differentiation.
- To assess the impact of 4-MI on the expression of key genes related to hematopoietic cytokines.
Main Methods:
- Cultured BMSCs were exposed to varying concentrations of 4-MI.
- Assessed cell viability, proliferation (osteoblast and adipocyte differentiation), apoptosis, and cell cycle progression.
- Analyzed cell migration capabilities.
- Quantified the gene expression of hematopoietic-related markers: Thrombopoietin (TPO), Stem Cell Factor (SCF), Vascular Endothelial Growth Factor (VEGF), and Fms-like tyrosine kinase 3 (FLt3).
Main Results:
- Higher 4-MI concentrations (≥150 μg/ml) significantly impacted BMSC viability.
- Lower 4-MI concentrations (≤100 μg/ml) showed no significant effects on BMSC proliferation, apoptosis, migration, differentiation, or the expression of TPO, SCF, VEGF, and FLt3.
- The biological characteristics of BMSCs were largely unaffected by 4-MI at concentrations ≤100 μg/ml.
Conclusions:
- Low concentrations of 4-MI found in foods and beverages do not appear to exert toxic effects on BMSCs.
- The observed anemia and weight loss in animals exposed to 4-MI may not be directly attributable to its effects on BMSCs.
- Further research may be needed to elucidate the precise mechanisms underlying 4-MI's systemic toxicity.
