Transplant approach establishes that kidneys are responsible for serum CSF-1 but require a stimulus in MRL-lpr mice.

Published

Journal Article

Colony stimulating factor-1 (CSF-1) is a chemoattractant and growth factor for macrophages. In autoimmune MRL-lpr mice, CSF-1 is detected in the circulation and there is an increase in CSF-1 transcripts and macrophages in the kidney. The purpose of this study was to establish whether the MRL-lpr kidney is responsible for increasing serum CSF-1, and to determine if the expression of CSF-1 requires a circulating component in MRL-lpr mice. We transplanted a MRL-lpr kidney with nephritis [serum CSF-1 = 32.6 +/- 5.1 colony forming units (CFU)] into a bilaterally nephrectomized normal MRL-++ recipient. Circulating CSF-1 increased from 1.2 +/- CFU to 14.1 +/_ 5.6 CFU in recipients by one week. Continuous production of CSF-1 required a stimulating component since: (1) CSF-1 in the kidney and circulation disappeared several weeks after engraftment into MRL-++ mice and (2) isolated glomeruli from MRL-lpr required stimulation to express CSF-1. In the transplanted MRL-lpr kidney, hypercellularity in the glomerulus and interstitium (predominantly macrophages) returned to normal as rapidly as two weeks after engraftment into MRL-++. Thus, this study establishes that the kidney is responsible for circulating CSF-1 in MRL-lpr mice. Without the autoimmune environment CSF-1, macrophages, but not T cells, disappear and nephritis resolves.

Full Text

Duke Authors

Cited Authors

  • Naito, T; Griffiths, RC; Coffman, TM; Kelley, VR

Published Date

  • January 1, 1996

Published In

Volume / Issue

  • 49 / 1

Start / End Page

  • 67 - 74

PubMed ID

  • 8770950

Pubmed Central ID

  • 8770950

International Standard Serial Number (ISSN)

  • 0085-2538

Language

  • eng

Conference Location

  • United States