Macrophage inflammatory protein-1 alpha mediated growth inhibition in a haemopoietic stem cell line is associated with inositol 1,4,5 triphosphate generation

Heyworth, C M and Pearson, M A and Dexter, T M and Wark, G and Owen-Lynch, P J and Whetton, A D (1995) Macrophage inflammatory protein-1 alpha mediated growth inhibition in a haemopoietic stem cell line is associated with inositol 1,4,5 triphosphate generation. Growth Factors, 12 (3). pp. 165-172. ISSN 0897-7194

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Abstract

Macrophage Inflammatory Protein-1 alpha (MIP-1 alpha) can inhibit the proliferation of multipotent haemopoietic cells. Using the FDCP-Mix A4 multipotent stem cell line, MIP-1 alpha was shown to inhibit 1L-3 stimulated cell cycling (assessed using the [3H]-thymidine "suicide" assay). Furthermore, MIP-1 alpha can inhibit 1L-3-stimulated [3H]-thymidine incorporation in FDCP-Mix cells, with half maximal inhibition observed at 3 ng/ml MIP-1 alpha. Prostaglandin E2, but not MIP-1 alpha was able to elevate cyclic AMP levels in FDCP-Mix A4 cells although both agents can cause growth inhibition. However, MIP-1 alpha addition resulted in a pertussis-toxin-insensitive increase in the level of the second messenger inositol 1,4,5 triphosphate (Ins 1,4,5P3). This response was both rapid (maximal at 5 seconds) and transient. A half maximal effect was observed at 5 ng/ml MIP-1 alpha and the dose dependency correlated with that for MIP-1 alpha mediated growth inhibition. A rapid increase in cytosolic Ca2+ levels was also observed in response to MIP-1 alpha. Inositol lipid hydrolysis and an increase in cytosolic Ca2+ (signals normally associated with proliferation) may therefore be implicated in growth inhibitory mechanisms in multipotent cells.

Item Type:
Journal Article
Journal or Publication Title:
Growth Factors
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qr
Subjects:
?? MIP-1αGROWTH INHIBITION FDCP-MIX INOSITOL LIPID HYDROLYSIS BIOMEDICAL AND LIFE SCIENCESCELL BIOLOGYENDOCRINOLOGYCLINICAL BIOCHEMISTRYQR MICROBIOLOGY ??
ID Code:
56087
Deposited By:
Deposited On:
24 Jul 2012 10:44
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Sep 2023 04:03