PMID- 36943488 OWN - NLM STAT- MEDLINE DCOM- 20240214 LR - 20240326 IS - 1539-2031 (Electronic) IS - 0192-0790 (Linking) VI - 58 IP - 3 DP - 2024 Mar 1 TI - Baseline Peripheral Eosinophil Count Independently Predicts Proton Pump Inhibitor Response in Eosinophilic Esophagitis. PG - 242-246 LID - 10.1097/MCG.0000000000001845 [doi] AB - GOALS: To assess the predictive value of baseline peripheral absolute eosinophil counts (AECs) for proton pump inhibitor (PPI) response in eosinophilic esophagitis (EoE). BACKGROUND: PPI leads to histologic remission in ~50% of EoE patients, although there are few distinguishing clinical features between PPI-responsive (PPI-r-EoE) and nonresponsive (PPI-nr-EoE) diseases. Peripheral eosinophilia is present in ~50% of EoE cases and is associated with eosinophil density on esophageal biopsy and worse clinical outcomes. The association between peripheral eosinophilia and PPI-responsiveness in EoE remains unclear. STUDY: This is a retrospective cohort study of adult EoE patients at a tertiary center between 2012 and 2016. All patients underwent twice daily PPI trials for >/=8 weeks followed by repeat esophageal biopsies and were classified as PPI-r-EoE or PPI-nr-EoE based on histologic response (<15 eosinophils/high power field). Baseline peripheral AEC was obtained within 1 month before index endoscopy. Analyses were performed using Fisher exact/Student t test (univariate) and logistic regression (multivariable). RESULTS: One hundred eighty-three patients (91 PPI-nr-EoE and 92 PPI-r-EoE) were included. Mean peripheral AEC was higher among PPI-nr-EoE patients (0.41 vs 0.24 K/microL, P = 0.013). Baseline peripheral eosinophilia (>0.5 K/microL) was more prevalent among patients with PPI-nr-EoE (70.4% vs 45.5%, P = 0.023) and a history of food impaction (51.9% vs 23.7%, P = 0.0082). On multivariable analyses, peripheral eosinophilia remained an independent predictor for PPI response (adjacent odds ratio = 2.86, CI: 1.07-7.62, P = 0.036) and food impaction (adjacent odds ratio = 2.80, CI: 1.07-7.35, P = 0.037). CONCLUSIONS: Baseline peripheral eosinophilia independently predicts PPI nonresponse and food impaction in EoE patients. Peripheral AEC may help therapy selection in EoE and prevent delays in achieving histologic remission. CI - Copyright (c) 2023 Wolters Kluwer Health, Inc. All rights reserved. FAU - Muftah, Mayssan AU - Muftah M AD - Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital. AD - Harvard Medical School. FAU - Barshop, Kenneth AU - Barshop K AD - Harvard Medical School. AD - Department of Medicine, Brigham and Women's Hospital, Boston, MA. FAU - Redd, Walker D AU - Redd WD AD - Harvard Medical School. AD - Department of Medicine, Brigham and Women's Hospital, Boston, MA. FAU - Goldin, Alison H AU - Goldin AH AD - Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital. AD - Harvard Medical School. FAU - Lo, Wai-Kit AU - Lo WK AD - Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital. AD - Harvard Medical School. FAU - Chan, Walter W AU - Chan WW AD - Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital. AD - Harvard Medical School. LA - eng PT - Journal Article DEP - 20240301 PL - United States TA - J Clin Gastroenterol JT - Journal of clinical gastroenterology JID - 7910017 RN - 0 (Proton Pump Inhibitors) RN - Eosinophilic enteropathy SB - IM MH - Adult MH - Humans MH - *Eosinophilic Esophagitis/complications MH - Proton Pump Inhibitors/therapeutic use MH - Eosinophils/pathology MH - Retrospective Studies MH - Endoscopy, Gastrointestinal MH - *Enteritis MH - *Eosinophilia MH - *Gastritis EDAT- 2023/03/22 06:00 MHDA- 2024/02/14 12:48 CRDT- 2023/03/21 12:15 PHST- 2022/11/06 00:00 [received] PHST- 2023/02/24 00:00 [accepted] PHST- 2024/02/14 12:48 [medline] PHST- 2023/03/22 06:00 [pubmed] PHST- 2023/03/21 12:15 [entrez] AID - 00004836-202403000-00005 [pii] AID - 10.1097/MCG.0000000000001845 [doi] PST - epublish SO - J Clin Gastroenterol. 2024 Mar 1;58(3):242-246. doi: 10.1097/MCG.0000000000001845.