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Comparative Study | Journal Article | Research Support, Non-U.S. Gov't

Butyric acid-induced apoptosis of murine thymocytes, splenic T cells, and human Jurkat T cells.

T Kurita-Ochiai, K Fukushima, K Ochiai
T Kurita-Ochiai
Department of Microbiology, Nihon University School of Dentistry at Matsudo, Chiba, Japan. tkurita@mascat.nihon-u.ac.jp
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K Fukushima
Department of Microbiology, Nihon University School of Dentistry at Matsudo, Chiba, Japan. tkurita@mascat.nihon-u.ac.jp
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K Ochiai
Department of Microbiology, Nihon University School of Dentistry at Matsudo, Chiba, Japan. tkurita@mascat.nihon-u.ac.jp
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ABSTRACT

The purpose of this study was to examine the effect of butyric acid, an extracellular metabolite from periodontopathic bacteria, on apoptosis induction in murine thymocytes, splenic T cells, and human Jurkat T cells. Butyric acid significantly suppressed T-cell viability in both a concentration- and time-dependent fashion. The results of DNA fragmentation assay indicated that butyric acid rapidly induced apoptosis in thymocytes (with 1.25 mM butyric acid and 6 h after treatment) and in splenic T cells and Jurkat cells (with 2.5 mM butyric acid and 16 h after treatment). Incubation of thymocytes or Jurkat cells with 5 mM butyric acid for 21 h resulted in the typical ladder pattern of DNA fragmentation. Furthermore, Jurkat cells treated with 5 mM butyric acid showed the characteristic pattern of apoptotic cells such as chromatin condensation and hypodiploid nuclei. Experiments with fractionated subpopulations of splenic T cells revealed that DNA fragmentation was predominantly observed in CD4+ T cells. Butyric acid-induced apoptosis of thymocytes was decreased by the protein kinase inhibitors H7 and staurosporine. These inhibitors were less effective with similarly treated splenic T cells and Jurkat cells. These data suggest that butyric acid, one of the volatile fatty acids produced by periodontopathic bacteria and one that easily penetrates the oral mucosa, can modulate the immunoregulatory cell population in periodontal tissue by inducing T-cell death through apoptosis.

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Butyric acid-induced apoptosis of murine thymocytes, splenic T cells, and human Jurkat T cells.
T Kurita-Ochiai, K Fukushima, K Ochiai
Infection and Immunity Jan 1997, 65 (1) 35-41; DOI:

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Butyric acid-induced apoptosis of murine thymocytes, splenic T cells, and human Jurkat T cells.
T Kurita-Ochiai, K Fukushima, K Ochiai
Infection and Immunity Jan 1997, 65 (1) 35-41; DOI:
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