Optimized Receptor Binding Profile in an Ultra-Stable, Ultra-Rapid-Acting Insulin

Award Information
Agency:
Department of Health and Human Services
Branch
n/a
Amount:
$622,539.00
Award Year:
2011
Program:
SBIR
Phase:
Phase I
Contract:
1R43DK092041-01
Award Id:
n/a
Agency Tracking Number:
R43DK092041
Solicitation Year:
2011
Solicitation Topic Code:
NIDDK
Solicitation Number:
PA10-050
Small Business Information
10000 Cedar Avenue, CLEVELAND, OH, -
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
963396747
Principal Investigator:
BRUCE FRANK
(617) 695-0523
bruce@thermalin.com
Business Contact:
RICHARD BERENSON
(617) 695-0523
rick@thermalin.com
Research Institution:
Stub




Abstract
DESCRIPTION (provided by applicant): We seek to develop an ultra-fast, zinc-free insulin analog formulation for the treatment of diabetes mellitus. An ultra-fast pharmacokinetic-dynamic (PK/PD) profile promises to enable superior performance of pump therapy (continuous subcutaneous insulin infusion) with enhanced safety and more robust integration with glucose- sensing technologies. Ultra-fast kinetics would also facilitate post-prandial glycemic control following single mealtime injections. The barrier tosubcutaneous absorption is insulin self-assembly. The key component of an ultra-fast formulation would, thus, be an engineered insulin monomer with sufficient intrinsic chemical and physical stability to render zinc-mediated self-assembly unnecessary. Suchan analog was developed 20 years ago (AspB10-insulin), but failed preclinical testing due to its potential tumorigenicity and increased in vitro mitogenicity relative to native insulin. These properties are thought to reflect increased binding to the IGF-I receptor (IGF-1R) and prolonged residence time at the insulin receptor (IR). We have discovered that a strategic fluoro-modification of an AspB10-insulin analog (a) eliminates undesirable binding to IGF-1R and prolonged IR residence time and, at the sametime, (b) enhances the stabilizing effects of AspB10. The fluoro-modified residue is ortho-F-PheB24, which is amenable to insertion by chemical synthesis or by novel genetic engineering. Phase-I support is, therefore, requested to achieve milestones related to the stability, potency, mitogenicity, and PK/PD of fluoro-protected AspB10 analogs containing rapid-acting B-chain substitutions at positions B28 and B29 (derived from current products Humalog(R) and Novolog(R)). This proposal makes innovative use offluorine (a mainstay of medicinal chemistry) in protein biotechnology to enhance the safety and efficacy of insulin replacement therapy. PUBLIC HEALTH RELEVANCE: Diabetes is increasing in global prevalence. To provide greater convenience, improvedglycemic control, and fewer adverse side-effects (all of which result in greater compliance and lower healthcare costs), we have invented novel ultra-stable and ultra-rapid-acting insulin analogs (designated Fluorolog-1 and Fluorolog-2) that exhibit optimized receptor binding profiles attenuating unwanted effects of AspB10 on binding to the insulin receptor (IR) and the IGF-I receptor (IGF-1R), in principle reducing cancer risk. The innovative design of these analogs exploits fluorine-based electrostatic engineering to tune the stability, mitogenicity, and potency of an engineered Zn-free insulin monomer. This project will complete feasibility testing on Fluorolog-1 and Fluorolog-2.

* information listed above is at the time of submission.

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