{"title":"Vialinin A对抗原刺激的RBL-2H3细胞脱粒的抑制作用。","authors":"Ange Murielle Djidjou Tagne, Kouichi Sugaya, Jun-Ichi Onose, Naoki Abe","doi":"10.1248/bpb.b25-00121","DOIUrl":null,"url":null,"abstract":"<p><p>As previously reported, vialinin A, inhibits tumor necrosis factor α (TNF-α) production and extracellular release from RBL-2H3 cells by targeting USP5. In this study, we examined its inhibitory effect and mechanism of action on immunoglobulin E (IgE)-mediated early-phase allergic reactions in RBL-2H3 cells. Vialinin A inhibited β-hexosaminidase release from RBL-2H3 cells and tended to suppress cytosolic calcium ion concentration elevations. Kinase analysis and results from immunoblotting showed that vialinin A inhibited Syk activation and its autophosphorylation. Consequently, the phosphorylation of Syk downstream signalling proteins, such as linker for activation of T cells family and phospholipase Cγ1/2, essential in calcium ion mobilization and cell activation were slightly inhibited. These results suggest that vialinin A affects degranulation of RBL-2H3 cells by inhibiting Syk.</p>","PeriodicalId":8955,"journal":{"name":"Biological & pharmaceutical bulletin","volume":"48 6","pages":"878-881"},"PeriodicalIF":1.7000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Syk Inhibitory Activity of Vialinin A on Degranulation from Antigen-Stimulated RBL-2H3 Cells.\",\"authors\":\"Ange Murielle Djidjou Tagne, Kouichi Sugaya, Jun-Ichi Onose, Naoki Abe\",\"doi\":\"10.1248/bpb.b25-00121\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>As previously reported, vialinin A, inhibits tumor necrosis factor α (TNF-α) production and extracellular release from RBL-2H3 cells by targeting USP5. In this study, we examined its inhibitory effect and mechanism of action on immunoglobulin E (IgE)-mediated early-phase allergic reactions in RBL-2H3 cells. Vialinin A inhibited β-hexosaminidase release from RBL-2H3 cells and tended to suppress cytosolic calcium ion concentration elevations. Kinase analysis and results from immunoblotting showed that vialinin A inhibited Syk activation and its autophosphorylation. Consequently, the phosphorylation of Syk downstream signalling proteins, such as linker for activation of T cells family and phospholipase Cγ1/2, essential in calcium ion mobilization and cell activation were slightly inhibited. These results suggest that vialinin A affects degranulation of RBL-2H3 cells by inhibiting Syk.</p>\",\"PeriodicalId\":8955,\"journal\":{\"name\":\"Biological & pharmaceutical bulletin\",\"volume\":\"48 6\",\"pages\":\"878-881\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biological & pharmaceutical bulletin\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1248/bpb.b25-00121\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHARMACOLOGY & PHARMACY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biological & pharmaceutical bulletin","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1248/bpb.b25-00121","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHARMACOLOGY & PHARMACY","Score":null,"Total":0}
Effect of Syk Inhibitory Activity of Vialinin A on Degranulation from Antigen-Stimulated RBL-2H3 Cells.
As previously reported, vialinin A, inhibits tumor necrosis factor α (TNF-α) production and extracellular release from RBL-2H3 cells by targeting USP5. In this study, we examined its inhibitory effect and mechanism of action on immunoglobulin E (IgE)-mediated early-phase allergic reactions in RBL-2H3 cells. Vialinin A inhibited β-hexosaminidase release from RBL-2H3 cells and tended to suppress cytosolic calcium ion concentration elevations. Kinase analysis and results from immunoblotting showed that vialinin A inhibited Syk activation and its autophosphorylation. Consequently, the phosphorylation of Syk downstream signalling proteins, such as linker for activation of T cells family and phospholipase Cγ1/2, essential in calcium ion mobilization and cell activation were slightly inhibited. These results suggest that vialinin A affects degranulation of RBL-2H3 cells by inhibiting Syk.
期刊介绍：
Biological and Pharmaceutical Bulletin (Biol. Pharm. Bull.) began publication in 1978 as the Journal of Pharmacobio-Dynamics. It covers various biological topics in the pharmaceutical and health sciences. A fourth Society journal, the Journal of Health Science, was merged with Biol. Pharm. Bull. in 2012.
The main aim of the Society’s journals is to advance the pharmaceutical sciences with research reports, information exchange, and high-quality discussion. The average review time for articles submitted to the journals is around one month for first decision. The complete texts of all of the Society’s journals can be freely accessed through J-STAGE. The Society’s editorial committee hopes that the content of its journals will be useful to your research, and also invites you to submit your own work to the journals.
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