PMID- 26039722 OWN - NLM STAT- MEDLINE DCOM- 20160222 LR - 20181113 IS - 1531-7056 (Electronic) IS - 0267-1379 (Print) IS - 0267-1379 (Linking) VI - 31 IP - 4 DP - 2015 Jul TI - Proton pump inhibitor-responsive oesophageal eosinophilia and eosinophilic oesophagitis: more similarities than differences. PG - 309-15 LID - 10.1097/MOG.0000000000000185 [doi] AB - PURPOSE OF REVIEW: The purpose of this study is to discuss the clinical, endoscopic and histologic features, pathogenesis and disease mechanisms of proton pump inhibitor (PPI)-responsive oesophageal eosinophilia (PPI-REE), and to highlight similarities and differences with eosinophilic oesophagitis (EoE). RECENT FINDINGS: PPI-REE is a condition in which patients have clinical and histologic findings similar to EoE, but achieve complete remission with PPI treatment. More than one-third of patients who have oesophageal symptoms associated with oesophageal eosinophilia respond to PPI treatment. Emerging data elucidating the pathogenesis of PPI-REE have shown that Th2-related inflammatory factors such as interleukin (IL)-13, IL-5, eotaxin-3 and major basic protein (MBP) are elevated in PPI-REE, similar to EoE. PPI-REE also shares a genetic expression signature with EoE that reverses with PPI treatment. Mechanisms proposed to explain the PPI response include an acid-independent, anti-inflammatory action of PPIs and PPI-induced restoration of oesophageal barrier function. SUMMARY: Multiple features of PPI-REE overlap extensively with EoE. This raises the question of whether PPI-REE is merely a subtype of EoE rather than an independent condition. This similarity may have future implications for algorithms informing evaluation and treatment of oesophageal eosinophilia. FAU - Eluri, Swathi AU - Eluri S AD - aCenter for Esophageal Diseases and Swallowing bCenter for Gastrointestinal Biology and Disease, Division of Gastroenterology and Hepatology, Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA. FAU - Dellon, Evan S AU - Dellon ES LA - eng GR - K23 DK090073/DK/NIDDK NIH HHS/United States GR - U54AI117804/AI/NIAID NIH HHS/United States GR - R01 DK101856/DK/NIDDK NIH HHS/United States GR - K23DK090073/DK/NIDDK NIH HHS/United States GR - U54 AI117804/AI/NIAID NIH HHS/United States GR - T32DK007634/DK/NIDDK NIH HHS/United States GR - R01DK101856/DK/NIDDK NIH HHS/United States GR - T32 DK007634/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Review PL - United States TA - Curr Opin Gastroenterol JT - Current opinion in gastroenterology JID - 8506887 RN - 0 (Proton Pump Inhibitors) SB - IM MH - Eosinophilic Esophagitis/diagnosis/*drug therapy/genetics MH - Esophageal pH Monitoring/methods MH - Esophagoscopy/methods MH - Gastroesophageal Reflux/diagnosis MH - Gene Expression Regulation/drug effects MH - Humans MH - Prognosis MH - Proton Pump Inhibitors/pharmacology/*therapeutic use PMC - PMC4586084 MID - NIHMS723711 COIS- Conflict of Interest: Eluri - none Dellon - none pertaining to this article. EDAT- 2015/06/04 06:00 MHDA- 2016/02/24 06:00 PMCR- 2016/07/01 CRDT- 2015/06/04 06:00 PHST- 2015/06/04 06:00 [entrez] PHST- 2015/06/04 06:00 [pubmed] PHST- 2016/02/24 06:00 [medline] PHST- 2016/07/01 00:00 [pmc-release] AID - 00001574-201507000-00007 [pii] AID - 10.1097/MOG.0000000000000185 [doi] PST - ppublish SO - Curr Opin Gastroenterol. 2015 Jul;31(4):309-15. doi: 10.1097/MOG.0000000000000185.