4-Chlorotetrazolo[1,5-a]quinoxaline inhibits activation of Syk kinase to suppress mast cells in vitro and mast cell-mediated passive cutaneous anaphylaxis in mice

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Toxicology and Applied Pharmacology

DOI:https://doi.org/10.1016/J.TAAP.2011.09.009· OSTI ID:22212569

Park, Kui Lea ^[1]; Ko, Na Young; Lee, Jun Ho; Kim, Do Kyun; Kim, Hyuk Soon; Kim, A-Ram; Her, Erk; Kim, Bokyung ^[2]; Kim, Hyung Sik ^[3]; Moon, Eun-Yi ^[4]; Kim, Young Mi ^[5]; Kim, Hang-Rae ^[6]

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1. Center for Drug Development Assistance, National Institute of Food Drug Safety Evaluation (NIFDS), KFDA, Cheongwon-gun (Korea, Republic of)
2. Department of Immunology and physiology, College of Medicine, Konkuk University, Chungju (Korea, Republic of)
3. College of Pharmacy, Pusan National University, Busan (Korea, Republic of)
4. Department of Bioscience and Biotechnology, College of Biological Science, Sejong University, Seoul (Korea, Republic of)
5. College of Pharmacy, Duksung Women's University, Seoul (Korea, Republic of)
6. Department of Anatomy, Seoul National University College of Medicine, Seoul (Korea, Republic of)

4-Chlorotetrazolo[1,5-a]quinoxaline is a quinoxaline derivative. We aimed to study the effects of 4-chlorotetrazolo[1,5-a]quinoxaline on activation of mast cells in vitro and in mice. 4-Chlorotetrazolo[1,5-a]quinoxaline reversibly inhibited degranulation of mast cells in a dose-dependent manner, and also suppressed the expression and secretion of TNF-{alpha} and IL-4 in mast cells. Mechanistically, 4-chlorotetrazolo[1,5-a]quinoxaline inhibited activating phosphorylation of Syk and LAT, which are crucial for early Fc{epsilon}RI-mediated signaling events, as well as Akt and MAP kinases, which play essential roles in the production of various pro-inflammatory cytokines in mast cells. Notably, although 4-chlorotetrazolo[1,5-a]quinoxaline inhibited the activation of Fyn and Syk, minimal inhibition was observed in mast cells in the case of Lyn. Furthermore, consistent with its in vitro activity, 4-chlorotetrazolo[1,5-a]quinoxaline significantly suppressed mast cell-mediated passive cutaneous anaphylaxis in mice. In summary, the results from this study demonstrate that 4-chlorotetrazolo[1,5-a]quinoxaline shows an inhibitory effect on mast cells in vitro and in vivo, and that this is mediated by inhibiting the activation of Syk in mast cells. Therefore, 4-chlorotetrazolo[1,5-a]quinoxaline could be useful in the treatment of mast cell-mediated allergic diseases. -- Highlights: Black-Right-Pointing-Pointer 4-chlorotetrazolo[1,5-a]quinoxaline is a quinoxaline derivative. Black-Right-Pointing-Pointer The effect of 4-chlorotetrazolo[1,5-a]quinoxaline on mast cells was investigated. Black-Right-Pointing-Pointer 4-chlorotetrazolo[1,5-a]quinoxaline reversibly inhibited Syk activation. Black-Right-Pointing-Pointer 4-chlorotetrazolo[1,5-a]quinoxaline could be useful for IgE-mediated allergy.

• OSTI ID: 22212569
• Journal Information: Toxicology and Applied Pharmacology, Vol. 257, Issue 2; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0041-008X
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
ALLERGY
ANAPHYLAXIS
DISEASES
IN VITRO
IN VIVO
INFLAMMATION
LYMPHOKINES
MAST CELLS
MICE
PHOSPHORYLATION
PHOSPHOTRANSFERASES