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Deprecated: Implicit conversion from float 225.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Host+Microbe 2020 ; 28 (2): 322-334.e5 Nephropedia Template TP
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BCG Vaccination in Humans Elicits Trained Immunity via the Hematopoietic Progenitor Compartment #MMPMID32544459
Cirovic B; de Bree LCJ; Groh L; Blok BA; Chan J; van der Velden WJFM; Bremmers MEJ; van Crevel R; Handler K; Picelli S; Schulte-Schrepping J; Klee K; Oosting M; Koeken VACM; van Ingen J; Li Y; Benn CS; Schultze JL; Joosten LAB; Curtis N; Netea MG; Schlitzer A
Cell Host Microbe 2020[Aug]; 28 (2): 322-334.e5 PMID32544459show ga
Induction of trained immunity by Bacille-Calmette-Guerin (BCG) vaccination mediates beneficial heterologous effects, but the mechanisms underlying its persistence and magnitude remain elusive. In this study, we show that BCG vaccination in healthy human volunteers induces a persistent transcriptional program connected to myeloid cell development and function within the hematopoietic stem and progenitor cell (HSPC) compartment in the bone marrow. We identify hepatic nuclear factor (HNF) family members 1a and b as crucial regulators of this transcriptional shift. These findings are corroborated by higher granulocyte numbers in BCG-vaccinated infants, HNF1 SNP variants that correlate with trained immunity, and elevated serum concentrations of the HNF1 target alpha-1 antitrypsin. Additionally, transcriptomic HSPC remodeling was epigenetically conveyed to peripheral CD14(+) monocytes, displaying an activated transcriptional signature three months after BCG vaccination. Taken together, transcriptomic, epigenomic, and functional reprogramming of HSPCs and peripheral monocytes is a hallmark of BCG-induced trained immunity in humans.