USA flag logo/image

An Official Website of the United States Government

DISULFIDE LINKAGE OF IMMUNOTOXINS BY IGG OLIGOSACCHARIDE

Award Information

Agency:
Department of Health and Human Services
Branch:
N/A
Award ID:
18950
Program Year/Program:
1992 / SBIR
Agency Tracking Number:
18950
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Houston Biotechnology, Inc.
3608 Research Forest Drive. The Woodlands, TX 77381
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1992
Title: DISULFIDE LINKAGE OF IMMUNOTOXINS BY IGG OLIGOSACCHARIDE
Agency: HHS
Contract: N/A
Award Amount: $50,000.00
 

Abstract:

THE PREPARATION OF IMMUNOTOXINS COMPOSED OF RICIN A AND IMMUNOGLOBULINS HAS CLASSICALLY BEEN PERFORMED WITH HETEROBIFUNCTIONAL CROSSLINKERS SUCH AS N-SUCCINIMIDYL 3-(2-PYRIDYLDITHIO) PROPIONATE (SPDP). THESE CROSSLINKERS REACT WITH THE EPSILON-AMINO GROUPS OF LYSINE ON THE IGG MOLECULE AND THE SULFHYDRYL GROUP OF RICIN A. A COMMON DRAWBACK WITH THIS APPROACH IS THE LACK OF SPECIFIC LOCATION OF AMINO GROUPS ON THE IGG MOLECULE THAT MAY RESULT IN INAPPROPRIATE CONJUGATION LEADING TO DENATURATION OF THE ANTIBODY AND LOSS OF BINDING AFFINITY. IN THIS RESPECT THE CONJUGATION OF RICIN A TO THE FC-REGION OLIGOSACCHARIDES HAS A NUMBER OF DESIRABLE ASPECTS. THIS RESEARCH SEEKS TO SYNTHESIZE A NEW HETEROBIFUNCTIONAL CROSSLINKER AND TO DEVELOPCONJUGATION METHODS THAT UTILIZE ALDEHYDE GROUPS GENERATED FROM THE OXIDATION OF IGG CARBOHYDRATES. THE CROSSLINKER WILL PROVIDE A GROUP ON THE CARBOHYDRATES THAT CAN REACT WITH THE SULFHYDRYL GROUP OF RICIN A. THE CROSSLINKER AND CONJUGATION METHODS DEVELOPED IN THESE STUDIES WILL ALLOW THE PREPARATION OF IMMUNOTOXINS WITH LESS LOSS OF ACTIVITY THROUGH INAPPROPRIATE CONJUGATION OF AMINO GROUPS AND MORE DEFINED CHARACTERISTICS.

Principal Investigator:

Peter J Kelleher
7133630999

Business Contact:

Small Business Information at Submission:

Houston Biotechnology
3608 Research Forest Drive The Woodlands, TX 77381

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No