Doc Offers Top Hep C Drug Picks: BioBuzz

Stock quotes in this article: VRTX , ITMN , VRUS , XOMA , ARIA , XNPT , HGSI  

CAMBRIDGE, Mass. (TheStreet) -- Vertex Pharmaceuticals'(VRTX) experimental hepatitis C drug telaprevir was the star of last week's big hepatitis C research meeting, according to a well-respected doctor in the field who briefed institutional investors this afternoon.

Dr. Stefan Zeuzem of the Saarland University Hospital in Germany was the featured speaker on an investor conference call sponsored by JMP Securities Monday. JMP analyst Liisa Bayko asked Zeuzem to offer his thoughts on the hits and misses coming from last week's annual meeting of the American Association for the Study of Liver Disease.

Zeuzem is a key opinion leader in Hep C, works with most if not all of the experimental drugs in clinical trials, and is therefore widely sought out by professional investors for insights into what's working -- or what's not -- in Hep C drug development.

Among Zeuzem's comments on Monday's conference call:

  • Data from Vertex's telaprevir was the most important and discussed during the meeting. The high cure rates seen in the so-called C208 study of treatment-experienced patients were probably as high as the field will ever see with a protease inhibitor. Zeuzem also called the data on twice-daily dosing of telaprevir "convincing," but he's still cautious and would like to see additional, confirmatory data from a larger study.
  • The Hep C field is moving quickly to test treatment with two direct anti-virals against the Hep C virus, and hopefully eliminate the need for long-acting interferon and ribavirin -- the current standard of care for the disease.

    Zeuzem was impressed with the two-week antiviral activity shown in the so-called INFORM-1 study in both treatment-naïve and treatment-experienced patients. This study treats patients with a combination of InterMune's(ITMN) RG7227 and Pharmasset's(VRUS) RG7128. (The study is being co-sponsored by Roche, which co-owns development rights to both drugs.)

    He also noted that other companies, including Vertex and Bristol-Myers Squibb(BMY), plan to begin their own two-drug direct anti-viral combination studies next year.

  • Side effects of earlier-stage Hep C drug continue to raise some concerns, including elevated levels of jaundice and bilirubin in patients treated with Boehringer Ingelheim's BI-'335. Zeuzem said more analysis was needed before the side-effect profile of the drug was clear.

    Zeuzem said the jury was also still out on Schering-Plough's(SGP) second-generation protease inhibitor narlaprevir, which uses a common HIV drug known as ritonavir to boost blood levels.

  • Zalbin, a twice-monthly interferon from Human Genome Sciences(HGSI) and Novartis(NVS), might appeal to some patients who care most about reducing the number of injections required. He was less enthusiastic about another long-acting interferon from Zymogenetics(ZGEN) and Bristol-Myers Squibb, mainly because the drug is so early in development that it may become irrelevant if treatment with interferons and ribavirin are shelved due to the success of direct anti-viral drugs.

Xoma Waffles on Timing of Drug Partnership

(At 10:23 AM ET)

Xoma(XOMA) management backed away Monday from its previously stated promise of a Big Pharma partnership for its diabetes drug XOMA 052 by year's end.

The company now says that potential partners may need extra time to review new preclinical data of XOMA 052 in cardiovascular disease, which could significantly increase the value of the drug beyond diabetes.

Um, OK, but I bet if Xoma polled its shareholders today, most would be more than happy to see the company make good on its initial promise and bring home a diabetes partnership for '052 this year.

What we're getting instead looks suspiciously like stalling tactics, even with the dangled promise of a bigger deal that could encompass diabetes and cardiovascular indications.

At best, Xoma is sending investors mixed signals. On the one hand, the company says it has all the '052 data necessary to land a partnership today. But why, then, is the company also starting new studies in diabetes and cardiovascular disease, which it says partners may want to look at?

Xoma says it is speaking to many interested partners and those who wait for the next slug of '052 diabetes data expected in the third quarter 2010 may risk losing out to a competitor. But if there's already multi-party interest in '052, why can't Xoma management get a contract signed sooner rather than later?

Xoma's stock price clearly reflects a skepticism over '052 and the company's ability to pull off a significant partnership. Monday's conference call did nothing to dispel those doubts.

Ariad Upgraded, Xenoport Drug Delayed

(At 7:51 AM ET)

Shares of Ariad Pharmaceuticals(ARIA) may see some action Monday after a JPMorgan analyst upgraded the stock to overweight from neutral

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