PMID- 16541965 OWN - NLM STAT- MEDLINE DCOM- 20060801 LR - 20161020 IS - 1088-5412 (Print) IS - 1088-5412 (Linking) VI - 26 IP - 6 DP - 2005 Nov-Dec TI - Unanswered questions and warnings involving anti-immunoglobulin E therapy based on 2-year observation of clinical experience. PG - 435-9 AB - The relatively rapid development and deployment of a clinically useful monoclonal antibody omalizumab has produced a number of questions still not answered despite massive research and many clinical trials. The mechanism of action as down-regulation of FceR1 receptors in the presence of low free immunoglobulin E (IgE) is incomplete. Some severe allergic asthmatic patients respond almost immediately, others take months, and some never respond. No accounting for the possible antigen sweeping by the complexes of IgG-IgE has been reported. Skin tests may remain positive for much longer than reported, raising the possibility of anaphylaxis with concomitant specific immunotherapy. Two cases of anaphylaxis to specific immunotherapy while being "covered" with anti-IgE are reported. Total IgE levels do not always rise as expected, six cases of static IgE levels in responders are reported. Total IgE levels do not dependably predict usefulness. Current guidelines for anti-IgE use in asthmatic patients may require reexamination as data from broad clinical experience are gathered. FAU - Lanier, Bob Q AU - Lanier BQ AD - Department of Pediatrics, University of North Texas, Fort Worth, Texas 76132, USA. LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Allergy Asthma Proc JT - Allergy and asthma proceedings JID - 9603640 RN - 0 (Antibodies, Anti-Idiotypic) RN - 0 (Antibodies, Monoclonal) RN - 0 (Antibodies, Monoclonal, Humanized) RN - 0 (anti-IgE antibodies) RN - 2P471X1Z11 (Omalizumab) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Adult MH - Antibodies, Anti-Idiotypic/adverse effects/*therapeutic use MH - Antibodies, Monoclonal/adverse effects/*therapeutic use MH - Antibodies, Monoclonal, Humanized MH - Asthma/*drug therapy/immunology/physiopathology MH - Female MH - Humans MH - Immunoglobulin E/analysis MH - Male MH - Middle Aged MH - Omalizumab RF - 22 EDAT- 2006/03/18 09:00 MHDA- 2006/08/02 09:00 CRDT- 2006/03/18 09:00 PHST- 2006/03/18 09:00 [pubmed] PHST- 2006/08/02 09:00 [medline] PHST- 2006/03/18 09:00 [entrez] PST - ppublish SO - Allergy Asthma Proc. 2005 Nov-Dec;26(6):435-9.