2 Hot University Startup Technologies
At Osage University Partners, we see a lot of great early stage technologies from academic researchers around the country. In this blog entry, I will review two such life science opportunities - a multivalent therapy platform from UC Berkeley and a medical device to treat severe asthma from the University of Minnesota.
Should investors or entrepreneurs be interested in either of these technologies, please feel free to email me at mlehr@osagepartners.com.
UC Berkeley
For years, linear polymers modified with bioactive agents have been incorporated into hydrogel networks to make long-acting therapies mostly for tissue engineering applications. In a new twist, Berkeley researchers David Schaffer and Kevin Healy, have created a polymer-based scaffold that when coupled to multiple bioactive molecules creates a multivalent therapy with improved potency and durability compared to soluble bioactive molecules alone. The two Berkeley researchers have completed preliminary proof of principle work where they have shown that by linking the Sonic hedgehog (Shh) protein to a hyaluronic acid (HA) backbone via an N-ε-maleimidocaproic acid linker, Shh potency can be increased by more than 100-fold over soluble Shh.
The research by Schaffer and Healy hints at the ability to create multivalent therapies with improved drug properties without having to sacrifice efficacy due to linker tethering. This could be a significant advance over existing growth factors that are administered as single soluble molecule forms, which can limit their potency and durability. A particularly interesting application of this technology would be to create better enzyme replacement therapies (ERT), a market that pharma companies have been aggressively pursuing.
A VC’s take: Given the amount of interest in the enzyme replacement and rare disease space, the Schaffer / Healy technology is quite attractive. Multivalent ERTs may be more potent and longer acting than existing ERTs, which could then drive down costs for manufacturers and require less frequent dosing for patients. While the upside for multivalent therapies is quite large, there are a number of challenges associated with creating conjugates.
As with all linker technologies, there is a risk that the linker is not as stable as one would like and causes side effects once cleaved. Also, multivalent molecules come with some risk because side effects could be amplified. To mitigate that risk, Schaffer and Healy are working with known chemistries (cysteine conjugation), linkers (N-ε-maleimidocaproic acid) and backbones (hyaluronic acid).
Overall, this technology is pretty interesting, especially for those investors that are interested in dipping their toes into the ERT space. In time, I would be interested to see if this platform could be extended to bifunctional therapeutics and antibody-drug conjugates.
University of Minnesota
Dr. Erik Cressman, a Professor in the Department of Diagnostic Radiology, has developed a novel device for the treatment of severe persistent asthma, a condition that afflicts over 6 million patients 18 years and older worldwide whose asthma is not well controlled with drugs such as Advair (GSK) and Symbicort (AstraZeneca). Working with Mike Selzer, an experienced medtech entrepreneur, Dr. Cressman seeks to develop a thermal ablation balloon catheter comprised of a balloon coupled to the distal end of a catheter that conforms to the wall of an airway. Hot fluid is created from a safe and innovative exothermic reaction in the catheter and injected into the balloon to uniformly heat the airway. Interestingly, a single balloon can treat various airway diameters and locations.
During the treatment, the balloon gently compresses and ablates the treated airway by cross-linking sub-mucosal collagen to stiffen the airway and destroy airway smooth muscle (ASM), which helps to reduce airway response to an asthma attack. Balloon occlusion of the airway stops airflow during the treatment and allows lower treatment temperatures to reduce intra-procedural airway injury. The reaction by-product, a non-toxic salt, is safely expelled from the balloon/catheter following a treatment cycle outside the body through an exhaust channel without touching tissue.
A VC’s take: The use of ablation therapies has expanded from treating cardiac arrhythmias to treating pulmonary diseases such as COPD and asthma. While adoption of cardiac ablation devices has been quite successful, devices used to treat asthma and COPD have struggled with development cost overruns and weak adoption. Asthmatx, a venture-backed startup seeking to address severe asthma with a catheter-based system, provides a good case study on the promise and challenges associated with developing a med device for the pulmonary market.
Alair, the Asthmatx device, uses heat to reduce excess smooth muscle in airways in order to limit airway constriction. The company completed a double-blind placebo-controlled study that met its end points; however, the data indicated that the device performed marginally better than the sham control. Major insurers such as Aetna, WellCare, BlueCross, and United Healthcare, have denied coverage of the Alair product as they currently consider the Alair device to be investigational and not medically necessary.
In 2010, Boston Scientific acquired Asthmatx for a relatively modest upfront payment of $193 million. Reimbursement risk and product adoption concerns contributed to the somewhat disappointing acquisition price for the VCs that invested almost $100 million to support the development of the Alair system.
While the travails of Asthmatx will give some investors pause, it does provide a blueprint for similar devices to follow. Because of the work completed by Asthmatx, follow-on devices like Dr. Cressman’s will have a far greater understanding of the regulatory path, data that insurers require for reimbursement, and capital needed to get an effective product to market. Additionally, Dr. Cressman’s device is intended to plug into the existing ablation architecture, which should help ease product adoption and conserve capital for investors.

June 6, 2011




