Inhibition of stem cell factor- and nerve growth factor-induced morphological change by wortmannin in mast cells

1999 ◽  
Vol 22 (2) ◽  
pp. 108-112 ◽  
Author(s):  
Hyung-Min Kim ◽  
Young-Hoe Moon ◽  
Nyun-Hyung An
2003 ◽  
Vol 172 (1) ◽  
pp. 260-267 ◽  
Author(s):  
Gernot Sellge ◽  
Axel Lorentz ◽  
Thomas Gebhardt ◽  
Francesca Levi-Schaffer ◽  
Hueseyin Bektas ◽  
...  

1993 ◽  
Vol 268 (20) ◽  
pp. 14881-14887
Author(s):  
K. Horigome ◽  
J.C. Pryor ◽  
E.D. Bullock ◽  
E.M. Johnson

Blood ◽  
2000 ◽  
Vol 95 (6) ◽  
pp. 2052-2058 ◽  
Author(s):  
Junko Sawada ◽  
Atsuko Itakura ◽  
Akane Tanaka ◽  
Tohru Furusaka ◽  
Hiroshi Matsuda

Abstract Despite being a well-characterized neurotrophic factor, nerve growth factor (NGF) influences survival, differentiation, and functions of mast cells. We investigated whether NGF was able to induce directional migration of rat peritoneal mast cells (PMCs). NGF clearly induced chemotactic movement of PMCs in a dose-dependent manner with the drastic morphological change and distribution of F-actin, which was completely blocked by pretreatment with Clostridium botulinumC2 toxin, an actin-polymerization inhibitor. Because PMCs constitutively express the NGF high-affinity receptor (TrkA) with a tyrosine kinase domain, we focused on downstream effectors in signaling cascades following the TrkA. NGF rapidly activated both mitogen-activated protein kinase (MAPK) and phosphatidylinositol 3-kinase (PI3K), and the addition of inhibitors specific for MAPK kinase and PI3K suppressed cell migration and these signals. In the coculture system with PMCs and fibroblasts, which produce biologically active NGF, directional migration of PMCs to fibroblasts was observed, and the addition of anti-NGF polyclonal antibodies significantly suppressed the migration of PMCs. These findings suggested that NGF initiated chemotactic movement of PMCs through both MAPK and PI3K signaling pathways following TrkA activation. Thus, locally produced NGF may play an important role in mast cell accumulation in allergic and nonallergic inflammatory conditions.


1995 ◽  
Vol 4 (0) ◽  
pp. 7 ◽  
Author(s):  
Luigi Aloe ◽  
Marco Aurelio Tuveri ◽  
Francesco Angelucci

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