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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Death+Differ 2016 ; 23 (5): 853-64 Nephropedia Template TP
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Autophagy is dispensable for B-cell development but essential for humoral autoimmune responses #MMPMID26586568
Arnold J; Murera D; Arbogast F; Fauny JD; Muller S; Gros F
Cell Death Differ 2016[May]; 23 (5): 853-64 PMID26586568show ga
To gain new insight into the role of B-cell autophagy, we generated two novel mouse models deficient for the autophagy-related gene (Atg)5, one from the outset pro-B cell stage (Atg5f/? Mb1 cre) and the other in mature B cells only (Atg5f/? CD21 cre). We show that autophagy is dispensable for pro- to pre-B cell transition, but necessary at a basal level to maintain normal numbers of peripheral B cells. It appears non-essential for B-cell activation under B-cell receptor stimulation but required for their survival after lipopolysaccharide stimulation that drives plasmablast differentiation and for specific IgM production after immunization. Results obtained using Atg5f/? CD21 cre × C57BL/6lpr/lpr autoimmune-prone mice show that B-cell autophagy is involved in the maintenance of anti-nuclear antibody secretion, elevated number of long-lived plasma cells, and sustains IgG deposits in the kidneys. Thus, treatments specifically targeting autophagy might be beneficial in systemic autoimmune diseases.