Linked Life Data

17230440

Source:http://linkedlifedata.com/resource/pubmed/id/17230440

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2007-2-8
pubmed:abstractText
Antimicrobial peptides human beta-defensins (hBD) are mainly produced by epithelia of several organs including skin, and participate in innate immunity by killing invading pathogens. Besides their microbicidal activities, hBD activate several inflammatory and immune cells. Since hBD are generated by tissues where mast cells are present, we hypothesized that these peptides could activate mast cells. In this study, we demonstrated that both hBD-3 and hBD-4 induced mast cell degranulation, prostaglandin D2 production, intracellular Ca2+ mobilization and chemotaxis. Furthermore, hBD-3- and hBD-4-induced activation of mast cells was suppressed by pertussis toxin and U-73122, inhibitors for G protein and phospholipase C, respectively. We further revealed that hBD-3 and hBD-4 increased vascular permeability in the skin, which was dependent on the presence of mast cells, because hBD-3 and hBD-4 failed to enhance vascular permeability in mast cell-deficient Ws/Ws rats. We also demonstrated that hBD-3 and hBD-4 induced phosphorylation of MAPK p38 and ERK1/2, which were further required for hBD-mediated mast cell activation, as evidenced by the inhibitory effects of p38 and ERK1/2 inhibitors on mast cell degranulation. Together, these findings suggest the key role of hBD in inflammatory responses by recruiting and activating mast cells, and increasing vascular permeability.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0014-2980
pubmed:author
pubmed:issnType
Print
pubmed:volume
37
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
434-44
pubmed:dateRevised
2010-9-17
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Antimicrobial peptides human beta-defensin (hBD)-3 and hBD-4 activate mast cells and increase skin vascular permeability.
pubmed:affiliation
Department of Dermatology, Juntendo University School of Medicine, Tokyo, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't