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Butyrate and propionate downregulate ERK phosphorylation in HT-29 colon carcinoma cells prior to differentiation
D J Davido1, F Richter, F Boxberger
1Medizinische Klinik, Universität Würzburg, Josef Schneider Str. 2, 97080 Würzburg, Germany.
Abstract:
We have characterized the effects of different short-chain fatty acids (SCFAs) on cell growth and differentiation as well as the phosphorylation state of ERK1 and 2 in the human colon adenocarcinoma cell line HT-29. Of the five SCFAs tested, only butyrate and propionate impaired cellular proliferation. Moreover, butyrate and propionate specifically resulted in a decrease in ERK1 and 2 phosphorylation at 3 and 6 hours post-treatment, suggesting a correlation between the ability of these SCFAs to inhibit cellular proliferation and decrease ERK phosphorylation. Notably, the decrease in ERK phosphorylation was observed prior to the induction of the differentiation markers alkaline phosphatase (AP) and carcinoembryonic antigen (CEA) by butyrate and propionate from days 6 to 18 post-treatment. In the case of butyrate- and propionate-induced differentiation, ERK phosphorylation is a marker and may play a role in the proliferation and/or differentiation states of this cell line.
Insights
Short-chain fatty acids (SCFAs) like butyrate and propionate inhibit colon cancer cell proliferation by decreasing ERK phosphorylation, a key step preceding differentiation.
Area of Science:
- Cell Biology
- Biochemistry
- Cancer Research
Background:
- Short-chain fatty acids (SCFAs) are microbial metabolites with significant roles in gut health and disease.
- The human colon adenocarcinoma cell line HT-29 is a widely used model for studying colon cancer and intestinal cell biology.
- Extracellular signal-regulated kinases (ERK1/2) are crucial signaling molecules involved in cell proliferation and differentiation.
Purpose of the Study:
- To investigate the effects of different SCFAs on HT-29 cell proliferation and differentiation.
- To examine the impact of SCFAs on the phosphorylation state of ERK1 and 2 in HT-29 cells.
- To explore the correlation between SCFA-induced changes in ERK phosphorylation and cellular responses.
Main Methods:
- HT-29 cells were treated with various SCFAs.
- Cell proliferation was assessed.
- ERK1/2 phosphorylation levels were measured using Western blotting.
- Differentiation markers, alkaline phosphatase (AP) and carcinoembryonic antigen (CEA), were analyzed.
Main Results:
- Butyrate and propionate were the only SCFAs that significantly impaired HT-29 cell proliferation.
- Treatment with butyrate and propionate led to a decrease in ERK1/2 phosphorylation at 3 and 6 hours.
- The reduction in ERK phosphorylation preceded the induction of differentiation markers AP and CEA.
- ERK phosphorylation changes correlated with the antiproliferative effects of butyrate and propionate.
Conclusions:
- Butyrate and propionate inhibit colon cancer cell proliferation in HT-29 cells.
- Decreased ERK1/2 phosphorylation is an early event associated with SCFA-induced inhibition of proliferation and subsequent differentiation.
- ERK phosphorylation may play a regulatory role in the proliferation and differentiation of colon adenocarcinoma cells.