PMID- 20663054 OWN - NLM STAT- MEDLINE DCOM- 20101122 LR - 20131121 IS - 1365-2982 (Electronic) IS - 1350-1925 (Linking) VI - 22 IP - 8 DP - 2010 Aug TI - Treatment of gastro-esophageal reflux disease: the new kids to block. PG - 836-40 LID - 10.1111/j.1365-2982.2010.01537.x [doi] AB - Refractory gastro-esophageal reflux disease (GERD), defined as persistent symptoms despite proton pump inhibitor (PPI) therapy, is an increasingly prevalent condition and is becoming a major challenge for the clinician. Since non-acidic reflux may be associated with symptoms persisting during PPI treatment, the lower esophageal sphincter (LES), the most important barrier protecting against reflux, has become an important target for the treatment of (refractory) GERD. Preclinical research has identified several receptors that are involved in the control of transient lower esophageal sphincter relaxations (TLESRs), the predominant mechanism of both acid and non-acidic reflux events, and several drugs have now been tested in humans. The GABA(B) agonist baclofen has demonstrated to effectively reduce the rate of TLESRs and the amount of reflux in both GERD patients and healthy volunteers. Nevertheless, the occurrence of central side effects limits its clinical use for the treatment of GERD. Several analogues are being developed to overcome this limitation and have shown promising results. Additionally, metabotropic glutamate receptor 5 (mGluR5) receptor antagonists have shown to reduce both acid and non-acidic reflux in GERD patients and several molecules are currently being evaluated. Although CB(1) antagonists have been shown to reduce TLESRs, they are also associated with central side effects, limiting their clinical applicability. Despite the identification of several potentially interesting drugs, the main challenge for the future remains the reduction of central side effects. Moreover, future studies will need to demonstrate the efficacy of these treatments in patients with refractory GERD. FAU - Blondeau, K AU - Blondeau K AD - Center for gastroenterological research, KULeuven, Belgium. Kathleen.Blondeau@med.kuleuven.be LA - eng PT - Journal Article PT - Review PL - England TA - Neurogastroenterol Motil JT - Neurogastroenterology and motility JID - 9432572 RN - 0 (Cannabinoid Receptor Agonists) RN - 0 (GABA-B Receptor Agonists) RN - 0 (GRM5 protein, human) RN - 0 (Proton Pump Inhibitors) RN - 0 (Receptor, Metabotropic Glutamate 5) RN - 0 (Receptors, Metabotropic Glutamate) SB - IM MH - Cannabinoid Receptor Agonists MH - Esophageal Sphincter, Lower/drug effects MH - GABA-B Receptor Agonists MH - Gastroesophageal Reflux/*drug therapy MH - Humans MH - Proton Pump Inhibitors/pharmacology/therapeutic use MH - Receptor, Metabotropic Glutamate 5 MH - Receptors, Metabotropic Glutamate/antagonists & inhibitors EDAT- 2010/07/29 06:00 MHDA- 2010/12/14 06:00 CRDT- 2010/07/29 06:00 PHST- 2010/07/29 06:00 [entrez] PHST- 2010/07/29 06:00 [pubmed] PHST- 2010/12/14 06:00 [medline] AID - NMO1537 [pii] AID - 10.1111/j.1365-2982.2010.01537.x [doi] PST - ppublish SO - Neurogastroenterol Motil. 2010 Aug;22(8):836-40. doi: 10.1111/j.1365-2982.2010.01537.x.