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The response of human colonocytes to folate deficiency in vitro: functional and proteomic analyses
Susan J Duthie1, Yiannis Mavrommatis, Gary Rucklidge
1Rowett Research Institute, Bucksburn, Aberdeen, UK. sd@rri.sari.ac.uk
Abstract:
Low folate intake is associated with colon cancer. We combined a proteomics and biochemical approach to identify proteins and pathways affected by folate deficiency in human colonocytes. Folate differentially altered activity and expression of proteins involved in proliferation [e.g., PCNA], DNA repair [e.g., XRCC5, MSH2], apoptosis [e.g., BAG family chaperone protein, DIABLO and porin], cytoskeletal organization [e.g., actin, ezrin, elfin], and expression of proteins implicated in malignant transformation [COMT, Nit2].
Insights
Low folate intake impacts colon cancer risk. Folate deficiency affects key proteins in colon cells, influencing proliferation, DNA repair, and malignant transformation.
Area of Science:
- Molecular biology
- Cancer research
- Nutritional biochemistry
Background:
- Low folate intake is a known risk factor for colon cancer.
- Understanding molecular mechanisms is crucial for prevention and treatment.
Purpose of the Study:
- To identify proteins and pathways affected by folate deficiency in human colonocytes.
- To elucidate the molecular underpinnings of folate's role in colon cancer.
Main Methods:
- Combined proteomics and biochemical analyses.
- Investigated protein activity and expression changes in human colonocytes under folate deficiency.
Main Results:
- Folate deficiency altered proteins involved in cell proliferation (e.g., PCNA).
- Key proteins in DNA repair (e.g., XRCC5, MSH2) and apoptosis (e.g., BAG, DIABLO) were affected.
- Changes were observed in proteins related to cytoskeletal organization and malignant transformation (e.g., COMT, Nit2).
Conclusions:
- Folate status significantly impacts colonocyte molecular pathways.
- These alterations may contribute to the association between low folate intake and colon cancer development.
