The momentous discovery of phagocytic activity in teleost B cells has caused a dramatic paradigm shift from the belief that phagocytosis is performed mainly by professional phagocytes derived from common myeloid progenitor cells, such as macrophages/monocytes, neutrophils, and dendritic cells.Recent advances on phagocytic B cells and their microbicidal ability in teleost fish position B cells at the crossroads, bridging innate with adaptive immunity.Most importantly, an increasing body of experimental evidence demonstrates that, in both teleosts and mammals, phagocytic B Transmitter cells can recognize, take up, and destroy particulate antigens and then present those processed antigens to CD4+ T cells to elicit adaptive immune responses and that Miele KMDA 7633 FL Induction Hob With Integrated Extractor the phagocytosis is mediated by pattern recognition receptors and involves multiple cytokines.Thus, current findings collectively indicate that teleost phagocytic B cells, as well as their counterpart mammalian B1-B cells, can be considered one kind of professional phagocyte.The aim of this review is to summarize recent advances regarding teleost phagocytic B cells, with a particular focus on the recognizing receptors and modulating mechanisms of phagocytic B cells and the process of antigen presentation for T-cell activation.
We also attempt to provide new insights into the adaptive evolution of the teleost fish phagocytic B cell on the basis of its innate and adaptive roles.