Heterogeneous antigen repertoire

The term "Heterogeneous antigen repertoire" refers to a therapeutic strategy or target profile involving a diverse and often undefined collection of antigens rather than a single molecular entity. This concept is central to personalized medicine, particularly in oncology, where therapies like autologous dendritic cell vaccines or neoantigen-based mRNA vaccines aim to prime the immune system against a broad spectrum of patient-specific mutations (Schumacher & Schreiber, 2015). By targeting multiple epitopes simultaneously, these interventions seek to prevent "immune escape," a process where tumors evade detection by downregulating a single targeted protein (Finn, 2018). In infectious diseases, products like intravenous immunoglobulin (IVIG) utilize a heterogeneous repertoire of antibodies to provide broad-spectrum passive immunity against various pathogens (Arumugam et al., 2019). However, the lack of a single defined target complicates the standardization of potency assays and the prediction of specific off-target toxicities. Consequently, this "target" is often a placeholder in databases for complex biologicals that interact with the immune system in a polyvalent manner. Clinical monitoring for such therapies often relies on surrogate markers of genomic instability, such as tumor mutational burden, rather than direct target occupancy (Schumacher & Schreiber, 2015). The therapeutic goal is to leverage the inherent diversity of the adaptive immune system to achieve a more durable and comprehensive clinical response.

Other names

Unknown antigen repertoireHeterogeneous tumor antigensNeoantigen repertoirePolyvalent antigensTumor-associated antigensUndefined antigen set

Induction of a polyvalent immune response against a diverse set of antigens to prevent immune escape.