Polyclonal antigen repertoire

The polyclonal antigen repertoire refers to the vast and diverse collection of antigens recognized by the adaptive immune system, or the corresponding population of antibodies and lymphocyte receptors (Source: Nature Reviews Immunology, 2020). In a therapeutic context, this term does not describe a single molecular target but rather a collective system of immune recognition involving multiple B-cell and T-cell clones (Source: NCBI, 2023). Polyclonal preparations, such as intravenous immunoglobulin (IVIG), leverage this diversity by providing a broad spectrum of antibodies to neutralize various pathogens or toxins simultaneously (Source: AAAAI). While vaccines aim to expand the endogenous repertoire against specific pathogens, the complexity and variability of the repertoire make it a challenge for precise drug targeting compared to monoclonal approaches. Monitoring the repertoire's diversity, often via high-throughput sequencing of CDR3 regions, is increasingly used as a biomarker for immune health and response to immunotherapy in cancer (Source: Frontiers in Immunology, 2019). This systemic approach contrasts with targeted therapies that focus on a single protein or pathway. Consequently, the repertoire is viewed as a dynamic landscape of immune capability rather than a discrete druggable entity.

Other names

Immune repertoireB-cell receptor repertoireT-cell receptor repertoirePolyclonal antibody poolAntigenic repertoire

Passive immunization through the administration of pooled antibodies or active induction of a multi-epitope immune response to neutralize pathogens or toxins (Source: StatPearls, 2023).