Publication Date:
1988-02-05
Description:
The turnover of phosphatidylinositol 4,5-bisphosphate (PIP2) is believed to constitute a crucial step in the signaling pathways for stimulation of cells by a variety of bioactive substances, including mitogens, but decisive evidence for the idea has not been obtained. In the present study, a monoclonal antibody to PIP2 was microinjected into the cytoplasm of NIH 3T3 cells before or after exposure to mitogens. The antibody completely abolished nuclear labeling with [3H]thymidine induced by platelet-derived growth factor and bombesin, but not by fibroblast growth factor, epidermal growth factor, insulin, or serum. The findings strongly suggest that PIP2 breakdown is crucial in the elicitation and sustaining of cell proliferation induced by some types of mitogens such as platelet-derived growth factor and bombesin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matuoka, K -- Fukami, K -- Nakanishi, O -- Kawai, S -- Takenawa, T -- New York, N.Y. -- Science. 1988 Feb 5;239(4840):640-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Tokyo Metropolitan Institute of Gerontology, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2829356" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
*Antibodies, Monoclonal
;
Antigen-Antibody Complex
;
Bombesin/*pharmacology
;
Cell Division/*drug effects
;
Cells, Cultured
;
Insulin/pharmacology
;
Kinetics
;
Mice
;
Mice, Inbred Strains
;
Phosphatidylinositol 4,5-Diphosphate
;
Phosphatidylinositols/immunology/*physiology
;
Platelet-Derived Growth Factor/*pharmacology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
