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The activation of synovial mast cells: modulation of histamine release by tryptase and chymase and their inhibitors

The activation of synovial mast cells: modulation of histamine release by tryptase and chymase and their inhibitors
The activation of synovial mast cells: modulation of histamine release by tryptase and chymase and their inhibitors
Mast cells have been implicated as having pivotal roles in arthritis, but little is known of the processes leading to the activation of synovial mast cells or their potential for pharmacological control. We have investigated the ability of tryptase and chymase, and inhibitors of these major mast cell proteases to modulate the activation of mast cells from human synovial tissue. The tryptase inhibitor drug N-(1-hydroxy-2-naphthoyl)--arginyl--prolinamide hydrochloride (APC366) inhibited immunoglobulin E (IgE)-dependent histamine release in a dose-dependent manner, with about 70% inhibition being achieved at a dose of 300 ?M. Histamine release stimulated by calcium ionophore A23187 was also inhibited by this compound. The chymase inhibitor chymostatin inhibited IgE-dependent histamine release by approximately 60% at 1 ?g/ml. Tryptase at concentrations of 3.0 ?g/ml and greater stimulated histamine release from synovial cells, which was dependent on catalytic activity, whereas chymase had little effect on these cells. The activation of mast cells by tryptase may represent an amplification process in the synovium. The mast cell stabilising properties of inhibitors of tryptase and chymase could be of therapeutic value in arthritis.
0014-2999
223-229
He, S.
4e7f2b69-3d61-4c99-9e14-2f305623b5bb
Gaca, M.D.
739c0708-8847-4abe-9176-8ef786b69ccf
Walls, A.F.
aaa7e455-0562-4b4c-94f5-ec29c74b1bfe
He, S.
4e7f2b69-3d61-4c99-9e14-2f305623b5bb
Gaca, M.D.
739c0708-8847-4abe-9176-8ef786b69ccf
Walls, A.F.
aaa7e455-0562-4b4c-94f5-ec29c74b1bfe

He, S., Gaca, M.D. and Walls, A.F. (2001) The activation of synovial mast cells: modulation of histamine release by tryptase and chymase and their inhibitors. European Journal of Pharmacology, 412 (3), 223-229. (doi:10.1016/S0014-2999(01)00734-8).

Record type: Article

Abstract

Mast cells have been implicated as having pivotal roles in arthritis, but little is known of the processes leading to the activation of synovial mast cells or their potential for pharmacological control. We have investigated the ability of tryptase and chymase, and inhibitors of these major mast cell proteases to modulate the activation of mast cells from human synovial tissue. The tryptase inhibitor drug N-(1-hydroxy-2-naphthoyl)--arginyl--prolinamide hydrochloride (APC366) inhibited immunoglobulin E (IgE)-dependent histamine release in a dose-dependent manner, with about 70% inhibition being achieved at a dose of 300 ?M. Histamine release stimulated by calcium ionophore A23187 was also inhibited by this compound. The chymase inhibitor chymostatin inhibited IgE-dependent histamine release by approximately 60% at 1 ?g/ml. Tryptase at concentrations of 3.0 ?g/ml and greater stimulated histamine release from synovial cells, which was dependent on catalytic activity, whereas chymase had little effect on these cells. The activation of mast cells by tryptase may represent an amplification process in the synovium. The mast cell stabilising properties of inhibitors of tryptase and chymase could be of therapeutic value in arthritis.

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Published date: 2001

Identifiers

Local EPrints ID: 27091
URI: http://eprints.soton.ac.uk/id/eprint/27091
ISSN: 0014-2999
PURE UUID: 502c4b59-34e8-4979-b2ba-893af2a06177
ORCID for A.F. Walls: ORCID iD orcid.org/0000-0003-4803-4595

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Date deposited: 26 Apr 2006
Last modified: 16 Mar 2024 02:38

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Contributors

Author: S. He
Author: M.D. Gaca
Author: A.F. Walls ORCID iD

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