HISTOCULTURE OF SKIN FOR TOXICITY ASSAY

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 16405
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
5325 Metro Street, San Diego, CA, 92110
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Li, Lingna
 Principal Investigator
 (619) 299-3250
Business Contact
 1 R43 CA53995-01A1
Phone: () -
Research Institution
N/A
Abstract
THERE IS AN IMPORTANT NEED IN THE STUDY OF TOXICOLOGY OF TOPICALLY-APPLIED AND ENVIRONMENTAL AGENTS FOR AN IN VITRO SYSTEM TO STUDY THEIR TOXIC EFFECTS ON SKIN. THE IN VITRO SYSTEMS HAVE THE BENEFIT OF ALLOWING STUDY OF A LARGE VARIETY OF SUBSTANCES ON AN INDIVIDUAL SPECIMEN. AN IN VITRO SYSTEM CONTAINING ALL THE COMPONENTS OF SKIN ALLOWS STUDIES TO DETERMINE THE EFFECTS OF AGENTS ON THE VARIOUS COMPONENT CELL TYPES AND CELL INTERACTIONS. THIS IS PARTICULARLY THE CASE IN THREE-DIMENSIONAL HISTOCULTURE SYSTEMS. WE DEVELOPED A GEL-SUPPORTED, THREE-DIMENSIONAL HISTOCULTURE SYSTEM THAT ALLOWS THE INTACT GROWTH AND TOXICITY TESTING OF ALL COMPONENTS OF MOUSE SKIN, INCLUDING KERATINOCYTES, DERMAL FIBROBLASTS AND HAIR FOLLICLE CELLS AS WELL AS HAIR, FOR PERIODS OF 10 DAYS OR MORE (LI, L., MARGOLIS, L.B. AND HOFFMAN, R.M. PROC. NATL. ACAD. SCI., VOL.88, PP.1908-1912, MARCH 1991). USING THE HISTOCULTURE SYSTEM AND FLUORESCENT DYES THAT MEASURE CELL VIABILITY OR CELL DEATH, WE WILL INVESTIGATE THE EFFECTS OF A SERIES OF PESTICIDES, ORGANOTINS AND CARCINOGENS AS MODEL COMPOUNDS TO STUDY TOXICITY AND CARCINOGENESIS ON ALL TYPES OF CELLS WITHIN HISTOCULTURED MOUSE SKIN AND HUMAN FORESKIN AS WELL AS POTENTIAL STIMULATORS OF ON HAIR GROWTH FROM THE CULTURED SKIN. THE MEASUREMENT OF THE EFFECTS OF THE TOXINS ARE GREATLY ENHANCED BY CONFOCAL MICROSCOPY WHICH ALLOWS THE THREE-DIMENSIONAL OBSERVATION OF THE SPECIMENS NOT PREVIOUSLY POSSIBLE. THE EFFECTS OF AT LEAST ONE COMPOUND IN VITRO HAVE ALREADY CORRELATED IN VIVO USING ATHYMIC NUDE MICE SUCH THAT THE CYTOTOXIC EFFECTS IN VITRO CORRESPOND TO AN IRRITATION INDEX FOR THESE VARIOUS COMPOUNDS SCORED IN VIVO.

* Information listed above is at the time of submission. *

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