BACKGROUND: Although Helicobacter pylori eradication is a first-line treatment of gastric MALT lymphoma, roughly 25% of patients do not respond to treatment. CD4⁺ FOXP3⁺ regulatory T (Treg) cells regulate immune responses in physiological conditions and various inflammatory conditions, including H. pylori-associated diseases. Our goal was to determine how Treg cells affect responsiveness to H. pylori eradication therapy. MATERIALS AND METHODS: We performed dual immunohistochemistry for CD4 and FOXP3 to evaluate the prevalence of FOXP3⁺ Treg cells in the stomach of 63 patients with MALT lymphoma and 55 patients with chronic active gastritis. Receiver operating characteristic analysis was carried out to determine the best cut-off point in differentiating H. pylori eradication responders from nonresponders. RESULTS: Both the FOXP3⁺/CD4⁺ cell ratio and the absolute number of FOXP3⁺ cells per high-power field in MALT lymphoma were significantly greater in H. pylori eradication responders compared with nonresponders, suggesting that Treg cells function in regression mechanisms of MALT lymphomas. Cut-off points with good sensitivities and specificities were obtained to predict eradication outcome. CONCLUSIONS: A high number of Treg cells or a high ratio of Treg cells to the total number of CD4⁺ T cells in gastric MALT lymphoma could predict responsiveness to eradication therapy.
BACKGROUND: Although Helicobacter pylori eradication is a first-line treatment of gastric MALT lymphoma, roughly 25% of patients do not respond to treatment. CD4⁺ FOXP3⁺ regulatory T (Treg) cells regulate immune responses in physiological conditions and various inflammatory conditions, including H. pylori-associated diseases. Our goal was to determine how Treg cells affect responsiveness to H. pylori eradication therapy. MATERIALS AND METHODS: We performed dual immunohistochemistry for CD4 and FOXP3 to evaluate the prevalence of FOXP3⁺ Treg cells in the stomach of 63 patients with MALT lymphoma and 55 patients with chronic active gastritis. Receiver operating characteristic analysis was carried out to determine the best cut-off point in differentiating H. pylori eradication responders from nonresponders. RESULTS: Both the FOXP3⁺/CD4⁺ cell ratio and the absolute number of FOXP3⁺ cells per high-power field in MALT lymphoma were significantly greater in H. pylori eradication responders compared with nonresponders, suggesting that Treg cells function in regression mechanisms of MALT lymphomas. Cut-off points with good sensitivities and specificities were obtained to predict eradication outcome. CONCLUSIONS: A high number of Treg cells or a high ratio of Treg cells to the total number of CD4⁺ T cells in gastric MALT lymphoma could predict responsiveness to eradication therapy.
Authors: Christina Kalpadakis; Gerassimos A Pangalis; Theodoros P Vassilakopoulos; Stavroula Kyriakaki; Xanthi Yiakoumis; Sotirios Sachanas; Maria Moschogiannis; Pantelis Tsirkinidis; Penelope Korkolopoulou; Helen A Papadaki; Maria K Angelopoulou Journal: Curr Hematol Malig Rep Date: 2014-09 Impact factor: 3.952
Authors: Amandine Marine Laur; Pauline Floch; Lucie Chambonnier; Lucie Benejat; Victoria Korolik; Alban Giese; Pierre Dubus; Francis Mégraud; Antonio Bandeira; Philippe Lehours Journal: Oncotarget Date: 2016-01-19
Authors: Barbara Uhl; Katharina T Prochazka; Karoline Fechter; Katrin Pansy; Hildegard T Greinix; Peter Neumeister; Alexander Ja Deutsch Journal: World J Gastrointest Oncol Date: 2022-01-15