Histone deacetylase inhibition results in a common metabolic profile associated with HT29 differentiation

被引:26
作者
Alcarraz-Vizan, Gema [1 ,2 ]
Boren, Joan [1 ,2 ]
Lee, Wai-Nang Paul [3 ]
Cascante, Marta [1 ,2 ]
机构
[1] Univ Barcelona, Fac Biol, Dept Biochem & Mol Biol, E-08028 Barcelona, Spain
[2] Univ Barcelona, Inst Biomed, E-08028 Barcelona, Spain
[3] Harbor UCLA Med Ctr, Dept Pediat, LA Biomed Res Inst, Torrance, CA 90502 USA
关键词
Butyrate; Cell differentiation; Histone deacetylase; Medium chain fatty acids; Metabolism; Trichostatin A; BUTYRATE-INDUCED DIFFERENTIATION; CHAIN FATTY-ACIDS; MASS ISOTOPOMER; EPITHELIAL-CELLS; GENE-EXPRESSION; EARLY INDUCTION; TRICHOSTATIN-A; P21; EXPRESSION; CACO-2; CELLS; CANCER-CELLS;
D O I
10.1007/s11306-009-0192-0
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Cell differentiation is an orderly process that begins with modifications in gene expression. This process is regulated by the acetylation state of histones. Removal of the acetyl groups of histones by specific enzymes (histone deacetylases, HDAC) usually downregulates expression of genes that can cause cells to differentiate, and pharmacological inhibitors of these enzymes have been shown to induce differentiation in several colon cancer cell lines. Butyrate at high (mM) concentration is both a precursor for acetyl-CoA and a known HDAC inhibitor that induces cell differentiation in colon cells. The dual role of butyrate raises the question whether its effects on HT29 cell differentiation are due to butyrate metabolism or to its HDAC inhibitor activity. To distinguish between these two possibilities, we used a tracer-based metabolomics approach to compare the metabolic changes induced by two different types of HDAC inhibitors (butyrate and the non-metabolic agent trichostatin A) and those induced by other acetyl-CoA precursors that do not inhibit HDAC (caprylic and capric acids). [1,2-C-13(2)]-d-glucose was used as a tracer and its redistribution among metabolic intermediates was measured to estimate the contribution of glycolysis, the pentose phosphate pathway and the Krebs cycle to the metabolic profile of HT29 cells under the different treatments. The results demonstrate that both HDAC inhibitors (trichostatin A and butyrate) induce a common metabolic profile that is associated with histone deacetylase inhibition and differentiation of HT29 cells whereas the metabolic effects of acetyl-CoA precursors are different from those of butyrate. The experimental findings support the concept of crosstalk between metabolic and cell signalling events, and provide an experimental approach for the rational design of new combined therapies that exploit the potential synergism between metabolic adaptation and cell differentiation processes through modification of HDAC activity.
引用
收藏
页码:229 / 237
页数:9
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