Publications by authors named "Araki Hirabata"

The feasibility of lymphocyte isolation and flow cytometry using a single endoscopic biopsy specimen from the gastrointestinal tract of patients who have undergone hematopoietic stem cell transplantation has not been investigated. We acquired 51 endoscopic biopsy specimens from the gastrointestinal tract of 35 patients. We divided the flow cytometry samples into two groups: group A, successful lymphocyte isolation (n=24), and group B, incomplete isolation (n=27).

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The composition of lymphocytes in the gastric mucosa following the eradication of () in patients with and without gastric cancer has not been compared. This study performed a single spot analysis of gastric mucosal lymphocytes after eradication in patients with (n = 13) and without (n = 20) gastric cancer. Our comprehensive analysis of lymphocyte composition in the gastric mucosa revealed that: i) the proportion of CD8/CD3 cells was relatively higher in the peri-tumor mucosa than in the background mucosa; ii) the proportion of CCR4/CD3 cells was higher, and the ratio of CD62L/CD3CD4 cells was relatively lower in the gastric mucosa of cancer patients than in non-cancer patients; and iii) the proportion of CD45RACD62L/CD3CD4 cells, namely, the central memory CD4 T-cell fraction, was lower in the gastric mucosa of cancer patients than in non-cancer patients.

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Article Synopsis
  • This study focuses on the differences in lymphocyte compositions in gastric tissue among patients with autoimmune gastritis, active Helicobacter pylori infection, and inactive gastritis post-eradication.
  • The researchers found that certain ratios of CD4+ and CD8+ T-cells varied significantly between the different types of gastritis, particularly noting higher CD4+/CD3+ ratios in autoimmune gastritis.
  • The study suggests that an antrum CD8+/CD4+ ratio greater than 4.0 could serve as a potential diagnostic marker for autoimmune gastritis, based on its high sensitivity and specificity.
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