Adaptive immune receptors recognizing pneumococcal antigens

Adaptive immune receptors recognizing pneumococcal antigens encompass the diverse repertoire of B-cell receptors (BCRs) and T-cell receptors (TCRs) that specifically identify molecular patterns from Streptococcus pneumoniae (NIH, 2022). BCRs and their secreted antibody forms primarily target surface structures such as capsular polysaccharides and virulence proteins like pneumolysin and pneumococcal surface protein A (Frontiers in Immunology, 2021). These receptors are central to the adaptive immune response, where they initiate signaling, facilitate opsonophagocytosis, and neutralize toxins to clear infection (AACR, 2007). TCRs recognize processed pneumococcal peptides presented by MHC molecules, orchestrating cellular immunity and supporting the development of immunological memory (Oxford Academic, 2022). While not therapeutic targets in the traditional sense of being inhibited by small molecules, these receptors are the primary focus of pneumococcal vaccines, which aim to elicit a robust and memory-capable population of these receptors to provide long-term immunity (Vaccine, 2007). Understanding the specificity and breadth of this receptor repertoire is crucial for developing next-generation vaccines that cover a wider range of pneumococcal serotypes and prevent invasive disease (Nature, 2009).

Other names

Pneumococcal-specific B-cell receptorsPneumococcal-specific T-cell receptorsAnti-pneumococcal BCRsAnti-pneumococcal TCRsPneumococcal-reactive antibodiesPneumococcal-specific adaptive immune repertoire

Vaccines stimulate the clonal expansion and affinity maturation of B-cells and T-cells expressing these receptors to provide protective immunity; IVIG provides exogenous antibodies that act as secreted receptors to neutralize the pathogen.