PMID- 32590502 OWN - NLM STAT- MEDLINE DCOM- 20210903 LR - 20210903 IS - 1473-6322 (Electronic) IS - 1473-6322 (Linking) VI - 20 IP - 4 DP - 2020 Aug TI - Anaphylactic reactions to biological drugs. PG - 346-351 LID - 10.1097/ACI.0000000000000666 [doi] AB - PURPOSE OF REVIEW: This review summarizes the current knowledge of the pathogenic mechanisms of biologics-induced anaphylaxis, and the diagnostic and prophylactic strategies in the management of potentially reactive patients, to improve the safety profile of biologics. RECENT FINDINGS: The recent knowledge on the topic highlights the involvement of both effector and regulatory mechanisms in the immune response to biological agents. In addition, the impact of biological's immunogenicity on hypersensitivity reactions has been confirmed in a wider number of studies, defining some details about the kinetics of antidrug antibodies development, specifically immunoglobulin G (IgG) and immunoglobulin E (IgE). SUMMARY: Biological agents may induce anaphylaxis, mainly through the induction of antidrug antibodies. Biologics-related infusion reactions are often clinically consistent with type I hypersensitivity, but IgG antidrug antibodies may also be involved. The immune response toward biologicals is orchestrated by both effector and regulatory T cells. In addition, nonantibody-dependent mechanisms may occur. Among clinicians persists today again a low awareness, not only of the possibility to understand the immunological mechanisms behind anaphylaxis to biologicals but also the opportunity to apply potential strategies for the management of reactive patients aimed to guarantee a safe retreatment. FAU - Matucci, Andrea AU - Matucci A AD - Immunoallergology Unit, Careggi University Hospital, Florence. FAU - Vultaggio, Alessandra AU - Vultaggio A AD - Immunoallergology Unit, Careggi University Hospital, Florence. FAU - Nencini, Francesca AU - Nencini F AD - Immunoallergology Unit, Careggi University Hospital, Florence. FAU - Maggi, Enrico AU - Maggi E AD - Translational Immunology Unit, Immunology Area, Pediatric Hospital Bambino Gesu, IRCCS, Rome, Italy. LA - eng PT - Journal Article PT - Review PL - United States TA - Curr Opin Allergy Clin Immunol JT - Current opinion in allergy and clinical immunology JID - 100936359 RN - 0 (Biological Products) RN - 0 (Immunoglobulin G) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Anaphylaxis/chemically induced/*diagnosis/immunology/therapy MH - Biological Products/administration & dosage/*adverse effects MH - Drug Hypersensitivity/*diagnosis/immunology/therapy MH - Humans MH - Immunoglobulin E/immunology MH - Immunoglobulin G/immunology MH - Infusions, Intravenous MH - T-Lymphocytes, Cytotoxic/immunology MH - T-Lymphocytes, Regulatory/immunology EDAT- 2020/06/27 06:00 MHDA- 2021/09/04 06:00 CRDT- 2020/06/27 06:00 PHST- 2020/06/27 06:00 [entrez] PHST- 2020/06/27 06:00 [pubmed] PHST- 2021/09/04 06:00 [medline] AID - 00130832-202008000-00005 [pii] AID - 10.1097/ACI.0000000000000666 [doi] PST - ppublish SO - Curr Opin Allergy Clin Immunol. 2020 Aug;20(4):346-351. doi: 10.1097/ACI.0000000000000666.