Skip to main content

Macrophage colony stimulating factor increases hepatic macrophage content, liver growth and lipid accumulation in neonatal rats.

Author
Abstract
:

Signaling via the colony stimulating factor 1 receptor (CSF1R) controls the survival, differentiation and proliferation of macrophages. Mutations in CSF1, or CSF1R in mice and rats have pleiotropic effects on postnatal somatic growth. We tested the possible application of CSF1-Fc as a therapy for low birth weight (LBW) at term, using a model based upon maternal dexamethasone treatment in rats. Neonatal CSF1-Fc treatment did not alter somatic growth, and did not increase the blood monocyte count. Instead, there was a substantial increase in the size of liver in both control and LBW rats, and the treatment greatly exacerbated the lipid droplet accumulation seen in the dexamethasone LBW model. These effects were reversed upon cessation of treatment. Transcriptional profiling of the livers supported histochemical evidence of a large increase in macrophages with a resident Kupffer cell phenotype, and revealed increased expression of many genes implicated in lipid droplet formation. There was no further increase in hepatocyte proliferation over the already high rates in neonatal liver.

Year of Publication
:
2017
Journal
:
American journal of physiology. Gastrointestinal and liver physiology
Date Published
:
2017
ISSN Number
:
0193-1857
URL
:
http://www.physiology.org/doi/abs/10.1152/ajpgi.00343.2017?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed
DOI
:
10.1152/ajpgi.00343.2017
Short Title
:
Am J Physiol Gastrointest Liver Physiol
Download citation