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| Content Provider | PubMed Central |
|---|---|
| Author | Yano, H. Wershil, B. K. Arizono, N. Galli, S. J. |
| Abstract | The undecapeptide substance P is thought to mediate both vasodilatation and augmented vascular permeability when released from sensory nerve endings in the skin. Substance P also induces mast cell degranulation in vitro or in vivo. However, the extent to which substance P-induced changes in vascular permeability are mast cell-dependent is unclear. We investigated this issue by injecting substance P and certain related peptides (substance P1-4, substance P4-11) into the skin of genetically mast cell-deficient WBB6F1-W/W or WCB6F1- SI/SId mice the congenic normal (+/+) mice, and W/W mice which had undergone selective local repair of their mast cell deficiency by intradermal injection of IL-3-dependent mast cells generated in vitro from the bone marrow cells of the congenic +/+ mice. Substance P induced significant augmentation of vascular permeability and significant cutaneous swelling when injected into normal mice at doses as low as 2 pmol i.d. Substance P also induced granulocyte infiltration, although the infiltrate were modest and were seen at doses of peptide from 5 to more than 20-fold higher than those required for induction of tissue swelling. The effects of substance P on tissue swelling, vascular permeability, and granulocyte infiltration were virtually entirely mast cell dependent. By contrast, substance P1-4 was inactive in our assays at 25 nmol/site, and substance P4-11 induced modest augmentation of vascular permeability, which was at least in part mast cell independent. |
| Related Links | http://dx.doi.org/10.1172/jci114295 |
| Ending Page | 1286 |
| Page Count | 11 |
| Starting Page | 1276 |
| File Format | |
| ISSN | 00219738 |
| Journal | Journal of Clinical Investigation |
| Issue Number | 4 |
| Volume Number | 84 |
| Language | English |
| Publisher Date | 1989-10-01 |
| Access Restriction | Open |
| Subject Keyword | Medicine(all) Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine |
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