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Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa
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 a...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Blackwell Publishing Ltd
2000
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5926284/ https://www.ncbi.nlm.nih.gov/pubmed/11092980 http://dx.doi.org/10.1111/j.1349-7006.2000.tb00898.x |
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author | Hur, Kwon Gazdar, Adi F. Rathi, Asha Jang, Ja‐June Choi, Jae‐Hoon Kim, Dae‐Yong |
author_facet | Hur, Kwon Gazdar, Adi F. Rathi, Asha Jang, Ja‐June Choi, Jae‐Hoon Kim, Dae‐Yong |
author_sort | Hur, Kwon |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-5926284 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2000 |
publisher | Blackwell Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-59262842018-05-11 Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa Hur, Kwon Gazdar, Adi F. Rathi, Asha Jang, Ja‐June Choi, Jae‐Hoon Kim, Dae‐Yong Jpn J Cancer Res Rapid Communication 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. Blackwell Publishing Ltd 2000-11 /pmc/articles/PMC5926284/ /pubmed/11092980 http://dx.doi.org/10.1111/j.1349-7006.2000.tb00898.x Text en |
spellingShingle | Rapid Communication Hur, Kwon Gazdar, Adi F. Rathi, Asha Jang, Ja‐June Choi, Jae‐Hoon Kim, Dae‐Yong Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa |
title | Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa |
title_full | Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa |
title_fullStr | Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa |
title_full_unstemmed | Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa |
title_short | Overexpression of Human Telomerase RNA in Helicobacter pylori‐infected Human Gastric Mucosa |
title_sort | overexpression of human telomerase rna in helicobacter pylori‐infected human gastric mucosa |
topic | Rapid Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5926284/ https://www.ncbi.nlm.nih.gov/pubmed/11092980 http://dx.doi.org/10.1111/j.1349-7006.2000.tb00898.x |
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