Rho GTPases regulate degranulation and cytokine release from RBL-2H3 cells

被引:0
|
作者
Hide, I [1 ]
Itoh, Y [1 ]
Hisahara, T [1 ]
Ido, K [1 ]
Inoue, A [1 ]
Fujiwara, T [1 ]
Aktories, K [1 ]
Sugai, M [1 ]
Nakata, Y [1 ]
机构
[1] Hiroshima Univ, Inst Pharmaceut Sci, Dept Pharmacol, Hiroshima 7348551, Japan
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中图分类号
R392 [医学免疫学];
学科分类号
100102 ;
摘要
Clostridium difficile Toxin B (toxin B), which inactivates Rho GTPases, Rho, Rac, and Cdc42, inhibited the release of TNF-alpha as well as degranulation from antigen-stimulated RBL-2H3 cells, independently of reorganization of actin microfilaments. Rho-associated kinase (ROCK), one of the downstream effectors of Rho, was selectively involved in the release of TNF-alpha but not in degranulation. Toxin B inhibited the translocation of Ca2+-dependent protein kinase C (alpha and beta isozymes), which plays an important role in the release of TNF-alpha as well as degranulation. These results indicated that Rho GTPases regulate the release of TNF-alpha and degranulation by regulating at least the activation of Ca2+-dependent PKC in antigen-stimulated RBL-2H3 cells.
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页码:431 / 432
页数:2
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