摘要
Helicobacter pylori (H. pylori) represents an important factor in the development of atrophic gastritis, intestinal metaplasia (IM), and gastric cancer. Eradication of H. pylori has been reported to prevent gastric cancer only in cases without atrophy or IM. However, histological changes with eradication have yet to be fully clarified. We evaluated 38 H. pylori-positive cases before and after eradication at the gland level;pyloric glands were classified as showing gastric proper (G) and IM gland types, with the latter including gastric-and-intestinal mixed IM (GI-IM) and solely intestinal IM (I-IM), depending on the remaining gastric phenotypes. On eradication, acute and chronic inflammation attenuated rapidly and gradually, respectively, whereas levels of MUC5AC and MUC6 expression were not markedly altered. Gland width, size of nuclei and cytoplasm and their ratio in surface foveolar epithelium, the number of Ki-67-positive cells and the length of the proliferating zone in each gland were significantly decreased in G glands after eradication compared with those in GI-IM and I-IM. The number of mitotic phase cells, positive for phosphorylated histone H3 at serine 28, was increased in both types of IM compared to that in G glands in the H. pylori-infected state, but unexpectedly remained unchanged with eradication. These results suggest that GI-IM, as the beginning of IM, could represent a histological irreversible point with eradication and be considered as a “histological point of no return”.
Helicobacter pylori (H. pylori) represents an important factor in the development of atrophic gastritis, intestinal metaplasia (IM), and gastric cancer. Eradication of H. pylori has been reported to prevent gastric cancer only in cases without atrophy or IM. However, histological changes with eradication have yet to be fully clarified. We evaluated 38 H. pylori-positive cases before and after eradication at the gland level;pyloric glands were classified as showing gastric proper (G) and IM gland types, with the latter including gastric-and-intestinal mixed IM (GI-IM) and solely intestinal IM (I-IM), depending on the remaining gastric phenotypes. On eradication, acute and chronic inflammation attenuated rapidly and gradually, respectively, whereas levels of MUC5AC and MUC6 expression were not markedly altered. Gland width, size of nuclei and cytoplasm and their ratio in surface foveolar epithelium, the number of Ki-67-positive cells and the length of the proliferating zone in each gland were significantly decreased in G glands after eradication compared with those in GI-IM and I-IM. The number of mitotic phase cells, positive for phosphorylated histone H3 at serine 28, was increased in both types of IM compared to that in G glands in the H. pylori-infected state, but unexpectedly remained unchanged with eradication. These results suggest that GI-IM, as the beginning of IM, could represent a histological irreversible point with eradication and be considered as a “histological point of no return”.
作者
Yuka Kiriyama
Tomomitsu Tahara
Tomoyuki Shibata
Masaaki Okubo
Mitsuru Nakagawa
Asako Okabe
Naoki Ohmiya
Makoto Kuroda
Atsushi Sugioka
Masao Ichinose
Masae Tatematsu
Tetsuya Tsukamoto
Yuka Kiriyama;Tomomitsu Tahara;Tomoyuki Shibata;Masaaki Okubo;Mitsuru Nakagawa;Asako Okabe;Naoki Ohmiya;Makoto Kuroda;Atsushi Sugioka;Masao Ichinose;Masae Tatematsu;Tetsuya Tsukamoto(Department of Diagnostic Pathology, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan;Department of Gastroenterology, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan;Department of Hepatobiliary and Liver Transplant Surgery, School of Medicine, Fujita Health University, Toyoake, Japan;Second Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan;Japan Bioassay Research Center, Hadano, Japan)
