Overexpression of human telomerase RNA in Helicobacter pylori-infected human gastric mucosa

K. Hur, A. F. Gazdar, A. Rathi, J. J. Jang, J. H. Choi, D. Y. Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Telomerase, an enzyme associated with cellular immortality and malignancy, plays an important role in cellular immortalization and tumorigenesis. Furthermore, overexpression of the RNA component of the telomerase, called human telomerase RNA (hTR), has been demonstrated in various human cancers as an early event. The pattern of hTR expression following Helicobacter pylori (H. pylori) infection in human gastric mucosa was investigated by a radioactive in situ hybridization (ISH) assay. Paraffin-embedded sections of 50 biopsy specimens taken from the gastric antrum of individual patients infected to different extents with H. pylori, as well as normal gastric mucosa, were studied. In normal gastric mucosa, only weak hTR expression was noted and the expression was limited to basal cells of the gastric glands. However, the degree of hTR expression gradually increased in parallel with the degree of H. pylori infection. The mean scores of gastric mucosa with mild, moderate and severe degrees of H. pylori infection were 2.3, 2.8, and 3.7 times higher than that of normal gastric mucosa, respectively. The results of this study suggested that up-regulation of hTR expression is a frequent and early event associated with H. pylori infection in the gastric mucosa and may play some role in gastric carcinogenesis. Sufficient synthesis of hTR during this early stage may be a prerequisite for telomerase reactivation to occur in gastric cancer.

Original languageEnglish (US)
Pages (from-to)1148-1153
Number of pages6
JournalJapanese Journal of Cancer Research
Volume91
Issue number11
StatePublished - 2000

Fingerprint

Gastric Mucosa
Helicobacter pylori
Helicobacter Infections
Telomerase
Carcinogenesis
Pyloric Antrum
telomerase RNA
Paraffin
Stomach Neoplasms
In Situ Hybridization
Neoplasms
Stomach
Up-Regulation
Biopsy
Enzymes

Keywords

  • Gastric cancer
  • Helicobacter pylori
  • Human telomerase RNA
  • In situ hybridization

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Hur, K., Gazdar, A. F., Rathi, A., Jang, J. J., Choi, J. H., & Kim, D. Y. (2000). Overexpression of human telomerase RNA in Helicobacter pylori-infected human gastric mucosa. Japanese Journal of Cancer Research, 91(11), 1148-1153.

Overexpression of human telomerase RNA in Helicobacter pylori-infected human gastric mucosa. / Hur, K.; Gazdar, A. F.; Rathi, A.; Jang, J. J.; Choi, J. H.; Kim, D. Y.

In: Japanese Journal of Cancer Research, Vol. 91, No. 11, 2000, p. 1148-1153.

Research output: Contribution to journalArticle

Hur, K, Gazdar, AF, Rathi, A, Jang, JJ, Choi, JH & Kim, DY 2000, 'Overexpression of human telomerase RNA in Helicobacter pylori-infected human gastric mucosa', Japanese Journal of Cancer Research, vol. 91, no. 11, pp. 1148-1153.
Hur, K. ; Gazdar, A. F. ; Rathi, A. ; Jang, J. J. ; Choi, J. H. ; Kim, D. Y. / Overexpression of human telomerase RNA in Helicobacter pylori-infected human gastric mucosa. In: Japanese Journal of Cancer Research. 2000 ; Vol. 91, No. 11. pp. 1148-1153.
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