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. 1990 Jun;87(12):4828-32.
doi: 10.1073/pnas.87.12.4828.

Total absence of colony-stimulating factor 1 in the macrophage-deficient osteopetrotic (op/op) mouse

W Wiktor-Jedrzejczak  1 , A Bartocci, A W Ferrante Jr, A Ahmed-Ansari, K W Sell, J W Pollard, E R Stanley
Affiliations

Total absence of colony-stimulating factor 1 in the macrophage-deficient osteopetrotic (op/op) mouse

W Wiktor-Jedrzejczak et al. Proc Natl Acad Sci U S A. 1990 Jun.

Erratum in

  • Proc Natl Acad Sci U S A 1991 Jul 1;88(13):5937

Abstract

Osteopetrotic (op/op) mutant mice suffer from congenital osteopetrosis due to a severe deficiency of osteoclasts. Furthermore, the total number of mononuclear phagocytes is extremely low in affected mice. Serum, 11 tissues, and different cell and organ conditioned media from op/op mice were shown to be devoid of biologically active colony-stimulating factor 1 (CSF-1), whereas all of these preparations from littermate control +/+ and +/op mice contained the growth factor. The deficiency was specific for CSF-1 in that serum or conditioned media from op/op mice possessed elevated levels of at least three other macrophage growth factors. Partial correction of the op/op defect was observed following intraperitoneal implantation of diffusion chambers containing L929 cells, which in culture produce CSF-1 as their sole macrophage growth factor. No rearrangement of the CSF-1 gene in op/op mice was detected by Southern analysis. However, in contrast to control lung fibroblasts, which contained 4.6- and 2.3-kilobase CSF-1 mRNAs, only the 4.6-kilobase species was detected in op/op cells. An alteration in the CSF-1 gene is strongly implicated as the primary defect in op/op mice because they do not contain detectable CSF-1, their defect is correctable by administration of CSF-1, the op locus and the CSF-1 gene map within the same region of mouse chromosome 3, their CSF-1 mRNA biosynthesis is altered, and the op/op phenotype is consistent with the phenotype expected in a CSF-1 deficient mouse.

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