PMID- 37928538 OWN - NLM STAT- MEDLINE DCOM- 20231107 LR - 20231109 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 14 DP - 2023 TI - Albumins represent highly cross-reactive animal allergens. PG - 1241518 LID - 10.3389/fimmu.2023.1241518 [doi] LID - 1241518 AB - Albumins from animals are highly cross-reactive allergens for patients suffering from immunoglobulin E (IgE)-mediated allergy. Approximately 20-30% of cat and dog allergic patients show IgE reactivity and mount IgE-mediated allergic reactions to cat and dog albumin. It is astonishing that allergic patients can develop specific IgE responses against animal albumins because these proteins exhibit a more than 70% sequence identity to human serum albumin (HSA) which is the most abundant protein in the blood of the human body. The sequence identity of cat albumin (Fel d 2) and dog albumin (Can f 3) and HSA are 82% and 80%, respectively. Given the high degree of sequence identity between the latter two allergens and HSA one would expect that immunological tolerance would prohibit IgE sensitization to Fel d 2 and Can f 3. Here we discuss two possibilities for how IgE sensitization to Fel d 2 and Can f 3 may develop. One possibility is the failed development of immune tolerance in albumin-allergic patients whereas the other possibility is highly selective immune tolerance to HSA but not to Fel d 2 and Can f 3. If the first assumption is correct it should be possible to detect HSA-specific T cell responses and HSA-containing immune complexes in sensitized patients. In the latter scenario few differences in the sequences of Fel d 2 and Can f 3 as compared to HSA would be responsible for the development of selective T cell and B cell responses towards Fel d 2 as well as Can f 3. However, the immunological mechanisms of albumin sensitization have not yet been investigated in detail although this will be important for the development of allergen-specific prevention and allergen-specific immunotherapy (AIT) strategies for allergy to albumin. CI - Copyright (c) 2023 Liu, Trifonova, Tulaeva, Riabova, Karsonova, Kozlov, Elisyutina, Khaitov, Focke-Tejkl, Chen, Karaulov and Valenta. FAU - Liu, Zicheng AU - Liu Z AD - Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. FAU - Trifonova, Daria AU - Trifonova D AD - Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. AD - Laboratory for Immunopathology, Department of Clinical Immunology and Allergology, Sechenov First Moscow State Medical University, Moscow, Russia. FAU - Tulaeva, Inna AU - Tulaeva I AD - Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. AD - Laboratory for Immunopathology, Department of Clinical Immunology and Allergology, Sechenov First Moscow State Medical University, Moscow, Russia. FAU - Riabova, Ksenja AU - Riabova K AD - Laboratory for Immunopathology, Department of Clinical Immunology and Allergology, Sechenov First Moscow State Medical University, Moscow, Russia. FAU - Karsonova, Antonina AU - Karsonova A AD - Laboratory for Immunopathology, Department of Clinical Immunology and Allergology, Sechenov First Moscow State Medical University, Moscow, Russia. FAU - Kozlov, Evgeny AU - Kozlov E AD - Laboratory for Immunopathology, Department of Clinical Immunology and Allergology, Sechenov First Moscow State Medical University, Moscow, Russia. FAU - Elisyutina, Olga AU - Elisyutina O AD - National Research Center, NRCI Institute of Immunology, Federal Medical-Biological Agency (FMBA) of Russia, Moscow, Russia. AD - RUDN University, Moscow, Russia. FAU - Khaitov, Musa AU - Khaitov M AD - National Research Center, NRCI Institute of Immunology, Federal Medical-Biological Agency (FMBA) of Russia, Moscow, Russia. AD - Pirogov Russian National Research Medical University, Moscow, Russia. FAU - Focke-Tejkl, Margarete AU - Focke-Tejkl M AD - Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. AD - Karl Landsteiner University of Healthcare, Krems, Austria. FAU - Chen, Ting-Huan AU - Chen TH AD - Worg Pharmaceuticals, Hangzhou, China. FAU - Karaulov, Alexander AU - Karaulov A AD - Laboratory for Immunopathology, Department of Clinical Immunology and Allergology, Sechenov First Moscow State Medical University, Moscow, Russia. FAU - Valenta, Rudolf AU - Valenta R AD - Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. AD - Laboratory for Immunopathology, Department of Clinical Immunology and Allergology, Sechenov First Moscow State Medical University, Moscow, Russia. AD - National Research Center, NRCI Institute of Immunology, Federal Medical-Biological Agency (FMBA) of Russia, Moscow, Russia. AD - Karl Landsteiner University of Healthcare, Krems, Austria. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20231020 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (Albumins) RN - 0 (Allergens) RN - 37341-29-0 (Immunoglobulin E) RN - ZIF514RVZR (Serum Albumin, Human) SB - IM MH - Humans MH - Cats MH - Animals MH - Dogs MH - *Albumins MH - *Hypersensitivity MH - Allergens MH - Immunoglobulin E MH - Serum Albumin, Human PMC - PMC10623431 OTO - NOTNLM OT - albumin OT - allergen OT - allergy OT - antibody OT - cross-reactivity OT - epitope OT - immunoglobulin E (IgE) OT - tolerance COIS- Author T-HC was employed by the company Worg Pharmaceuticals. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/11/06 06:42 MHDA- 2023/11/07 06:45 PMCR- 2023/01/01 CRDT- 2023/11/06 04:36 PHST- 2023/06/16 00:00 [received] PHST- 2023/09/20 00:00 [accepted] PHST- 2023/11/07 06:45 [medline] PHST- 2023/11/06 06:42 [pubmed] PHST- 2023/11/06 04:36 [entrez] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2023.1241518 [doi] PST - epublish SO - Front Immunol. 2023 Oct 20;14:1241518. doi: 10.3389/fimmu.2023.1241518. eCollection 2023.