The aims of this study are to 1) characterize reactivity of the skin (i.e., mast cells) to injection of synthetic C3a peptides in normal human subjects, and in people whose skin mast cells may be """"""""nonspecific"""""""" releasers of histamine. In particular, people who have had an adverse reaction to intravenous injection of radiographic contrast media (RCM) will be examined; 2) compare skin reactivity to synthetic C3a peptides injected in """"""""normal"""""""" subjects to reactions in other groups of patients susceptible to hives, including atopic patients and patients with chronic idiopathic urticaria and angioedema; and 3) develop a screening assay which would reliably predict patients at greatest risk of adverse reactions to RCM or other stimuli.

Project Start
1999-12-01
Project End
2001-02-28
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
26
Fiscal Year
2000
Total Cost
$27,361
Indirect Cost
Name
Scripps Research Institute
Department
Type
DUNS #
City
La Jolla
State
CA
Country
United States
Zip Code
92037
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