Rhythmic modulation of the hematopoietic niche through neutrophil clearance.
Cell
; 153(5): 1025-35, 2013 May 23.
Article
in En
| MEDLINE
| ID: mdl-23706740
ABSTRACT
Unique among leukocytes, neutrophils follow daily cycles of release from and migration back into the bone marrow, where they are eliminated. Because removal of dying cells generates homeostatic signals, we explored whether neutrophil elimination triggers circadian events in the steady state. Here, we report that the homeostatic clearance of neutrophils provides cues that modulate the physiology of the bone marrow. We identify a population of CD62L(LO) CXCR4(HI) neutrophils that have "aged" in the circulation and are eliminated at the end of the resting period in mice. Aged neutrophils infiltrate the bone marrow and promote reductions in the size and function of the hematopoietic niche. Modulation of the niche depends on macrophages and activation of cholesterol-sensing nuclear receptors and is essential for the rhythmic egress of hematopoietic progenitors into the circulation. Our results unveil a process that synchronizes immune and hematopoietic rhythms and expand the ascribed functions of neutrophils beyond inflammation. PAPERFLICK
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bone Marrow
/
Circadian Rhythm
/
Neutrophils
Limits:
Animals
Language:
En
Journal:
Cell
Year:
2013
Document type:
Article
Affiliation country:
Spain