PMID- 2438330 OWN - NLM STAT- MEDLINE DCOM- 19870702 LR - 20071114 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 138 IP - 11 DP - 1987 Jun 1 TI - Effects of ADP-ribosylation of GTP-binding protein by pertussis toxin on immunoglobulin E-dependent and -independent histamine release from mast cells and basophils. PG - 3927-34 AB - Pretreatment of rat peritoneal mast cells, human basophils, bone marrow-derived mouse mast cells (BMMC) and mouse mast cell line PT-18 cells with 1 microgram/ml pertussis toxin (PT) failed to inhibit immunoglobulin E (IgE)-dependent histamine release from the cells. In BMMC and PT-18 cells, even 20-hr incubation of the cells with 1 microgram/ml PT, which ADP-ribosylates more than 97% of 41 kDa, alpha-subunit of Ni in the cells, failed to affect the IgE-dependent release of histamine or arachidonate. The results indicate that GTP-binding protein, Ni, is not involved in the transduction of triggering signals induced by cross-linking of IgE receptors. In contrast, pretreatment of rat mast cells with 1 ng/ml to 0.1 microgram/ml PT for 2 hr inhibited histamine release induced by compound 48/80 in a dose-dependent manner. A similar pretreatment with PT inhibited thrombin-induced histamine release from BMMC and N-formyl-L-methionyl-L-leucyl-L-phenylalanine-induced histamine release from human basophils in a similar dose-dependent fashion. However, even 20 hr of incubation of sensitized BMMC with 1 microgram/ml PT failed to inhibit either thrombin-induced or antigen-induced breakdown of phosphatidylinositides (PI), i.e., the formation of inositol triphosphate and diacylglycerol, Quin-2 signal, and the release of arachidonic acid. The results indicate that the inhibition of thrombin-induced histamine release by PT-treatment is not due to the inhibition of PI-turnover, and that Ni is not involved in thrombin-induced or antigen-induced (IgE-dependent) hydrolysis of phosphatidylinositides in mast cells. FAU - Saito, H AU - Saito H FAU - Okajima, F AU - Okajima F FAU - Molski, T F AU - Molski TF FAU - Sha'afi, R I AU - Sha'afi RI FAU - Ui, M AU - Ui M FAU - Ishizaka, T AU - Ishizaka T LA - eng GR - AI-10060/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Antigens) RN - 0 (Phosphatidylinositols) RN - 0 (Virulence Factors, Bordetella) RN - 20762-30-5 (Adenosine Diphosphate Ribose) RN - 37341-29-0 (Immunoglobulin E) RN - EC 2.4.2.31 (Pertussis Toxin) RN - EC 3.4.21.5 (Thrombin) RN - EC 3.6.1.- (GTP-Binding Proteins) SB - IM MH - Adenosine Diphosphate Ribose/*metabolism MH - Animals MH - Antigens MH - Basophils/*physiology MH - Bone Marrow Cells MH - Cell Membrane/metabolism MH - GTP-Binding Proteins/*physiology MH - Histamine Release/*drug effects MH - Humans MH - Immunoglobulin E/*physiology MH - Mast Cells/*physiology MH - Mice MH - *Pertussis Toxin MH - Phosphatidylinositols/metabolism MH - Rats MH - Thrombin/metabolism MH - Virulence Factors, Bordetella/*pharmacology EDAT- 1987/06/01 00:00 MHDA- 1987/06/01 00:01 CRDT- 1987/06/01 00:00 PHST- 1987/06/01 00:00 [pubmed] PHST- 1987/06/01 00:01 [medline] PHST- 1987/06/01 00:00 [entrez] PST - ppublish SO - J Immunol. 1987 Jun 1;138(11):3927-34.