Structural and Functional Analysis of Porcine CR1-like Proteins in C4b-Mediated Immune Responses.

ABSTRACT: The complement system is crucial for immune defense, linking innate and adaptive immunity. In the classical and lectin pathways, C4 is split into C4b, triggering opsonization, lysis, and the removal of pathogens and damaged cells. Dysregulated activation of C4 and other components of the classical pathway can lead to tissue damage and heightened inflammation, whereas appropriate regulation of C4b activity serves to mitigate excessive inflammation and prevent injury. ELISA analysis demonstrated C4 activation and cleavage during the co-incubation of PRRSV with fresh porcine serum. Immunoelectron microscopy revealed that porcine red blood cells could immunologically adhere to PRRSV, and C4b was involved in this adhesion process. BLAST (NCBI BLAST+ 2.14.1) analysis revealed that porcine CR1-li

SUBMITTER: Yin W 

PROVIDER: S-EPMC12846707 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature