Increase in histidine decarboxylase activity in tissues of mice bearing colon-26 tumor cells

Yoshiaki Takeuchi, Masahiro Nishibori, Masashi Uomoto, Hiromi Iwagaki, Naoki Nakaya, Noriaki Tanaka, Kiyomi Saeki

Research output: Contribution to journalArticle

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Abstract

The changes in histidine decarboxylase (HDC) activity, histamine and tele-methylhistamine contents were examined in tissues of mice after the inoculation of Colon-26 tumor cells subcutaneously into the lower back. The HDC activity in the spleen of mice increased significantly 14 days after the inoculation of Colon-26 and the increase in HDC activity continued for up to 28 days. However, the histamine content in the spleen of tumorbearing mice was not changed significantly during the observation period. In the following experiments, two subclones of the Colon-26 cell line, cachexia-inducing clone-20 and non cachexia-inducing clone-5, were used and the induction of HDC activity in mice was examined in four tissues, spleen, lung, liver and kidney. Both clone-20 and clone-5 induced the increase in HDC activity to the same extent in the spleen and lung, but not in the liver and kidney. As observed using the Colon-26 original cell line, the histamine contents in the four tissues of tumor-bearing mice were not different from those in the control mice. In contrast, the levels of tele-methylhistamine, one of the major catabolites of histamine, in the tumor-bearing mice increased significantly compared with the control mice in all four tissues examined. There was a correlation between the increase in tele-methylhistamine level and the increase in HDC activity in the tissues. A histological study indicated that the tissue mast cells were not increased in spleen and lung of tumor-bearing mice. These findings indicated that the increase in HDC activity in the spleen and lung occurred in parallel with the growth of inoculated tumor cells in mice and suggested that the cells other than mast cells may be involved in the increase in HDC activity. The tumor-bearing state produced histamine with a high turnover rate in the mouse tissues, especially in the spleen and lung.

Original languageEnglish
Pages (from-to)92-98
Number of pages7
JournalNaunyn-Schmiedeberg's Archives of Pharmacology
Volume360
Issue number1
DOIs
Publication statusPublished - 1999

Fingerprint

Histidine Decarboxylase
Colon
Spleen
Histamine
Neoplasms
Lung
Clone Cells
Cachexia
Mast Cells
Kidney
Cell Line
Liver

Keywords

  • Histamine
  • Histidine decarboxylase
  • Lung
  • Mouse
  • Spleen
  • Tumor inoculation

ASJC Scopus subject areas

  • Pharmacology

Cite this

Increase in histidine decarboxylase activity in tissues of mice bearing colon-26 tumor cells. / Takeuchi, Yoshiaki; Nishibori, Masahiro; Uomoto, Masashi; Iwagaki, Hiromi; Nakaya, Naoki; Tanaka, Noriaki; Saeki, Kiyomi.

In: Naunyn-Schmiedeberg's Archives of Pharmacology, Vol. 360, No. 1, 1999, p. 92-98.

Research output: Contribution to journalArticle

Takeuchi, Yoshiaki ; Nishibori, Masahiro ; Uomoto, Masashi ; Iwagaki, Hiromi ; Nakaya, Naoki ; Tanaka, Noriaki ; Saeki, Kiyomi. / Increase in histidine decarboxylase activity in tissues of mice bearing colon-26 tumor cells. In: Naunyn-Schmiedeberg's Archives of Pharmacology. 1999 ; Vol. 360, No. 1. pp. 92-98.
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AB - The changes in histidine decarboxylase (HDC) activity, histamine and tele-methylhistamine contents were examined in tissues of mice after the inoculation of Colon-26 tumor cells subcutaneously into the lower back. The HDC activity in the spleen of mice increased significantly 14 days after the inoculation of Colon-26 and the increase in HDC activity continued for up to 28 days. However, the histamine content in the spleen of tumorbearing mice was not changed significantly during the observation period. In the following experiments, two subclones of the Colon-26 cell line, cachexia-inducing clone-20 and non cachexia-inducing clone-5, were used and the induction of HDC activity in mice was examined in four tissues, spleen, lung, liver and kidney. Both clone-20 and clone-5 induced the increase in HDC activity to the same extent in the spleen and lung, but not in the liver and kidney. As observed using the Colon-26 original cell line, the histamine contents in the four tissues of tumor-bearing mice were not different from those in the control mice. In contrast, the levels of tele-methylhistamine, one of the major catabolites of histamine, in the tumor-bearing mice increased significantly compared with the control mice in all four tissues examined. There was a correlation between the increase in tele-methylhistamine level and the increase in HDC activity in the tissues. A histological study indicated that the tissue mast cells were not increased in spleen and lung of tumor-bearing mice. These findings indicated that the increase in HDC activity in the spleen and lung occurred in parallel with the growth of inoculated tumor cells in mice and suggested that the cells other than mast cells may be involved in the increase in HDC activity. The tumor-bearing state produced histamine with a high turnover rate in the mouse tissues, especially in the spleen and lung.

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