C3 and atypical hemolytic-uremic syndrome: It is also likely that both diseases such as atypical hemolytic-uremic syndrome (aHUS) and membranoproliferative glomerulonephritis (MPGN) associated with rather acute renal failure under the influence of infection (E. coli serotype c157: H7, Shigella, Yersinia, Streptococus, lupus erythematosus) depending on the immune mechanism with the participation of the C3 complement component may also be one of the mechanisms of FA synthesis change [14–16].