Enhancing Thrombostatin's Oral Delivery

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: 1R43HL086038-01
Agency Tracking Number: HL086038
Amount: $274,452.00
Phase: Phase I
Program: SBIR
Awards Year: 2006
Solicitation Year: 2006
Solicitation Topic Code: N/A
Solicitation Number: PHS2006-2
Small Business Information
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 (734) 663-4233
Business Contact
Phone: (734) 663-4233
Email: jhilfinger@tsrlinc.com
Research Institution
DESCRIPTION (provided by applicant): The long term objective of the project is to develop an orally bioavailable drug for treatment of individuals with acute coronary syndromes (ACS) and also individuals whose cancer is influenced by the mitogenic effects of thrombin. Current therapy for the acute coronary syndrome is a combination of anticoagulant/antiplatelet agents and percutaneous transluminal coronary angioplasty. Many of the agents routinely used for anticoagulant/antiplatelet activity, such as heparin, are administered intravenously. Other oral agents attack specific platelet targets like the ADP receptor (clopidogrel) or platelet cyclooxygenase (aspirin). Moreover, in recent years, thrombin, a procoagulant protein, has also been recognized as a potent mitogen and its inhibition may influence cancer growth and metastasis. We are aiming to develop an orally available thrombin inhibitor and thrombin receptor activation antagonist. Presently, we have a lead compound undergoing toxicology studies for an IND application for intravenous use in man. This compound is based upon a novel series of pentapeptide compounds consisting of D and synthetic amino acids derived from the ACE breakdown product of bradykinin. These compounds, collectively termed "Thrombostatins," show potential as inhibitors of thrombin and antagonists of thrombin activation of platelet protease activated receptors 1 and 4 (PAR1 and 4). In the current proposal, we aim to improve the oral bioavailability of the latest generation of Thrombostatins by chemical modification of the peptide structure in order to make the compound more lipophilic. The specific aims of this Phase 1 SBIR proposal are: Specific Aim #1: Synthesis of Masked Thrombostatin Analogs: We will synthesize a series of analogs of our lead Thrombostatin analog in order to reduce the charge and increase the hydrophobicity on the peptide. Specific Aim #2: Evaluation of Intestinal Absorption of the Thrombostatin Analogs: The new Thrombostatin analogs will be evaluated for intestinal stability and enhanced oral transport. Specific Aim #3: Testing of the Thrombostatin Analogs for oral anti-thrombosis activity: Testing of the novel oral Thrombostatin analogs for anti-thrombin activity in vitro and in vivo. The proposed work aims to advance the gastrointestinal bioavailability of Thrombostatin analogs to create an orally available thrombin and thrombin receptor activation antagonist for acute coronary syndrome and cancer therapy. This project specifically involves the development of a new oral drug to treat heart attacks and cancer.

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

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government