HCV: Bavituximab

La Peregrine Pharmaceuticals, Inc. , sta testando un nuovo farmaco per l'HCv il Bavituximab sperimentato in pazienti coinfetti HIV - HCV.
Il farmaco viene somministrato in un braccio con ribavirina contro ribavirina + interferone nell'altro braccio.
Si spera di avere buoni risultati visto che l'interferone non e' molto ben tollerato dai pazienti.
Chiaramente si punta all'eradicazione del virus HCV.

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Peregrine Pharmaceuticals, Inc. (PPHM) Completes Patient Enrollment in Phase Ib HCV/HIV Coinfection Trial
2011-01-31, Source: Peregrine Pharmaceuticals

Peregrine Pharmaceuticals, Inc. (NASDAQ: PPHM), a clinical-stage biopharmaceutical company developing first-in-class monoclonal antibodies for the treatment of cancer and viral infections, today announced the completion of enrollment in the company's Phase Ib dose escalation safety study of bavituximab in patients coinfected with chronic hepatitis C virus (HCV) and HIV. Previously this month, Peregrine initiated a randomized Phase II HCV trial to evaluate 12 weeks of therapy with bavituximab, a phosphatidylserine (PS)-targeting monoclonal antibody with immune-modulating potential, in combination with the antiviral drug ribavirin versus standard of care, pegylated interferon alpha 2a and ribavirin.


"Completion of enrollment in our third Phase I HCV trial is an important milestone for our bavituximab antiviral program, and sets the stage for reporting clinical data at a medical conference in the second quarter of this year while we begin to evaluate combination treatment with the antiviral agent ribavirin in a recently initiated study," said Steven W. King, president and chief executive officer of Peregrine. "Though standard treatment for chronic HCV may soon evolve with the introduction of new targeted antiviral drug candidates, immune stimulation with interferon remains a critical component of therapy. Preclinical data support the potential combination of bavituximab and ribavirin and we look forward to seeing how this combination initially compares to standard interferon and ribavirin treatment for 12 weeks in our Phase II study for patients infected with HCV."


In prior HCV clinical trials, bavituximab administered as monotherapy in single and multiple doses demonstrated a positive safety profile with no dose-limiting toxicities or serious adverse events. Bavituximab as a monotherapy also showed promising on therapy antiviral activity of up to 1.5 log viral load reduction.


Bavituximab may address a fundamental "immune evasion" mechanism exploited by many infectious pathogens. A growing body of published data from researchers worldwide shows that bavituximab's PS target, exposed on the surface of cells infected by viruses and protozoan parasites, suppresses the immune system's ability to fight disease. PS-targeting antibodies such as bavituximab bind to PS and block the immunosuppressive signals created by the target, thereby allowing the immune system to mount a robust immune response against the pathogen.


About the Phase Ib HCV Trial

Peregrine's open-label, dose escalation safety study is designed to assess the safety and of bavituximab in up to 24 patients chronically infected with HCV and HIV. Patient cohorts received ascending dose levels of bavituximab weekly for up to 8 weeks. Primary endpoints include safety and pharmacokinetics, and secondary endpoints will measure HCV and HIV RNA by PCR. For further information about Peregrine's HCV trials, please visit [Devi essere iscritto e connesso per vedere questo link] or [Devi essere iscritto e connesso per vedere questo link]


About HCV

According to the U.S. Centers for Disease Control and Prevention, an estimated 3.2 million individuals in the United States have chronic hepatitis C virus (HCV) infection. Chronic HCV infection is a serious disease that can result in long-term health problems, including liver damage, liver failure, liver cancer, or death. It is the leading cause of cirrhosis and liver cancer and the most common reason for liver transplant in the United States. Approximately 8,000 to 10,000 people die every year from HCV-related liver disease.


About Bavituximab's Antiviral Approach

Bavituximab is the first in a new class of patented antibody therapeutics that target and bind to phosphatidylserine (PS), a specific phospholipid component of cell membranes. Bavituximab helps reactivate and direct the body's immune system to destroy infected cells and virus particles that exhibit this specific phospholipid on their surface. Since their target is host-derived rather than pathogen-derived, PS-targeting antibodies have the potential for broad-spectrum antiviral activity and are also expected to be much less susceptible to the viral mutations that often lead to drug resistance.


Researchers have found that PS is exposed on the outer membrane of cells infected with HCV, HIV, influenza, herpes viruses, hemorrhagic fever viruses, respiratory syncytial virus, measles as well as other viruses. A growing body of scientific publications, including Nature Medicine and The Journal of Experimental Medicine, has highlighted data on the role of PS and Peregrine's PS-targeting therapies in infectious diseases.


About Peregrine Pharmaceuticals

Peregrine Pharmaceuticals, Inc. is a biopharmaceutical company with a portfolio of innovative monoclonal antibodies in clinical trials for the treatment of cancer and serious viral infections. The company is pursuing multiple clinical programs in cancer and hepatitis C virus infection with its lead product candidate bavituximab and novel brain cancer agent Cotara®. Peregrine also has in-house cGMP manufacturing capabilities through its wholly-owned subsidiary Avid Bioservices, Inc. ([Devi essere iscritto e connesso per vedere questo link] which provides development and biomanufacturing services for both Peregrine and outside customers. Additional information about Peregrine can be found at [Devi essere iscritto e connesso per vedere questo link]


Safe Harbor Statement: Statements in this press release which are not purely historical, including statements regarding Peregrine Pharmaceuticals' intentions, hopes, beliefs, expectations, representations, projections, plans or predictions of the future are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The forward-looking statements involve risks and uncertainties including, but not limited to, the risk that results from the Phase Ib or Phase II HCV trials will not be consistent with results experienced in earlier HCV clinical trials and preclinical studies, the risk that investigators may experience delays in patient enrollment, risk that results may not support registration filings with the U.S. Food and Drug Administration, and the risk that Peregrine may not have or raise adequate financial resources to complete the planned clinical programs. Factors that could cause actual results to differ materially or otherwise adversely impact the company's ability to obtain regulatory approval for its product candidates include, but are not limited to, uncertainties associated with completing preclinical and clinical trials for our technologies; the early stage of product development; the significant costs to develop our products as all of our products are currently in development, preclinical studies or clinical trials; obtaining additional financing to support our operations and the development of our products; obtaining regulatory approval for our technologies; anticipated timing of regulatory filings and the potential success in gaining regulatory approval and complying with governmental regulations applicable to our business. Our business could be affected by a number of other factors, including the risk factors listed from time to time in the company's SEC reports including, but not limited to, the annual report on Form 10-K for the year ended April 30, 2010 and the quarterly report on Form 10-Q for the quarter ended October 31, 2010. The company cautions investors not to place undue reliance on the forward-looking statements contained in this press release. Peregrine Pharmaceuticals, Inc. disclaims any obligation, and does not undertake to update or revise any forward-looking statements in this press release.


Peregrine Contact:

Amy Figueroa

Peregrine Pharmaceuticals

(800) 987-8256
[Devi essere iscritto e connesso per vedere questo link]

Fase 2 anche per Bavituximab + ribavirina, per eradicare HCV.
Sembra che tutte le aziende si siano messe d'accordo...

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SOURCE: Peregrine Pharmaceuticals


Apr 04, 2011 07:00 ET
Peregrine Presents Phase Ib HCV/HIV Data on Single-Agent Bavituximab at EASL

Bavituximab Safe and Well Tolerated, Ongoing Phase II Trial Evaluating Bavituximab With Ribavirin

TUSTIN, CA, and BERLIN, GERMANY--(Marketwire - April 4, 2011) - Peregrine Pharmaceuticals, Inc. (NASDAQ: PPHM), a clinical-stage biopharmaceutical company developing first-in-class monoclonal antibodies for the treatment of cancer and viral infections, today announced data from its Phase Ib dose escalation safety study of bavituximab in patients coinfected with chronic hepatitis C virus (HCV) and HIV. In a poster presented at the 46th Annual Meeting of the European Association for the Study of the Liver (EASL), data show bavituximab administered as a single agent for 8 weeks was generally safe and well tolerated at all four dose levels.

"Bavituximab used as a single agent has demonstrated a consistent, acceptable safety profile in three Phase I HCV trials to date, and we have seen enhanced antiviral activity when using bavituximab in combination with the antiviral agent ribavirin in several preclinical viral disease models," said Joseph S. Shan, vice president of clinical and regulatory affairs at Peregrine Pharmaceuticals. "Our recently initiated randomized Phase II trial will assess early virology response of genotype 1 HCV patients after 12 weeks of therapy combining bavituximab with ribavirin as a potential alternative to the current interferon-based regimen."

Peregrine's Phase Ib safety study included 27 patients (85% genotype 1 HCV) coinfected with HCV and HIV. Coinfected patients typically have higher HCV viral loads and more rapid progression compared to patients infected with HCV alone. Patient cohorts received ascending dose levels of bavituximab weekly (0.3 mg/kg, 1.0 mg/kg, 3 mg/kg and 6 mg/kg) for up to 8 weeks. Adverse events (AEs) were considered mild or moderate and were consistent with other bavituximab trials. Three serious adverse events were reported, two of which were drug-related (rash and hypersensitivity). Patients were not premedicated. No dose-limiting toxicities occurred and a maximum tolerated dose of bavituximab was not reached. Although not a primary endpoint of this safety study, HCV and HIV antiviral activity (≥0.5 log10 reduction) were observed in all treatment groups during bavituximab therapy.

In an ongoing randomized Phase II HCV trial, Peregrine is evaluating the 12-week early virologic response (EVR) rate of previously untreated genotype-1 HCV patients treated with Peregrine's bavituximab (0.3 mg/kg or 3 mg/kg) in combination with the antiviral drug ribavirin (1000 mg) versus current standard of care, pegylated interferon alpha-2a (180 µg) and ribavirin. For further information about this trial, which is being conducted outside of the U.S., please visit [Devi essere iscritto e connesso per vedere questo link] or [Devi essere iscritto e connesso per vedere questo link]

Jihad Slim, Infectious Diseases, Saint Michael's Medical Center, Newark, NJ; Mark S. Sulkowski, Center for Viral Hepatitis, John's Hopkins University, Baltimore, MD; Joseph S. Shan, Peregrine Pharmaceuticals, Inc., Tustin, CA. Escalating Repeat Dose Study of Bavituximab in Patients Co-infected with Chronic Hepatitis C Virus (HCV) and Human Immunodeficiency Virus. In Journal of Hepatology Supplement 1 46th Annual Meeting of the European Association for the Study of the Liver (EASL) 2011 Mar 30 - Apr 4; Berlin, Germany. Abstract 658.

A copy of the poster is available at Peregrine's website [Devi essere iscritto e connesso per vedere questo link]

For more information about EASL, please visit: [Devi essere iscritto e connesso per vedere questo link]

About Bavituximab's Antiviral Approach
Bavituximab is the first in a new class of patented antibody therapeutics that target and bind to phosphatidylserine (PS), a specific phospholipid component of cell membranes. Bavituximab helps reactivate and direct the body's immune system to destroy infected cells and virus particles that exhibit this specific phospholipid on their surface. Since their target is host-derived rather than pathogen-derived, PS-targeting antibodies have the potential for broad-spectrum antiviral activity and are also expected to be much less susceptible to the viral mutations that often lead to drug resistance.

Researchers have found that PS is exposed on the outer membrane of cells infected with HCV, HIV, influenza, herpes viruses, hemorrhagic fever viruses, respiratory syncytial virus, measles as well as other viruses. A growing body of scientific publications, including Nature Medicine and The Journal of Experimental Medicine, has highlighted data on the role of PS and Peregrine's PS-targeting therapies in infectious diseases.

About Peregrine Pharmaceuticals
Peregrine Pharmaceuticals, Inc. is a biopharmaceutical company with a portfolio of innovative monoclonal antibodies in clinical trials for the treatment of cancer and serious viral infections. The company is pursuing multiple clinical programs in cancer and hepatitis C virus infection with its lead product candidate bavituximab and novel brain cancer agent Cotara®. Peregrine also has in-house cGMP manufacturing capabilities through its wholly-owned subsidiary Avid Bioservices, Inc. ([Devi essere iscritto e connesso per vedere questo link] which provides development and biomanufacturing services for both Peregrine and outside customers. Additional information about Peregrine can be found at [Devi essere iscritto e connesso per vedere questo link]

Safe Harbor Statement: Statements in this press release which are not purely historical, including statements regarding Peregrine Pharmaceuticals' intentions, hopes, beliefs, expectations, representations, projections, plans or predictions of the future are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The forward-looking statements involve risks and uncertainties including, but not limited to, the risk that results from ongoing trials will not be consistent with results experienced in earlier clinical trials and preclinical studies, the risk that Peregrine may experience delays in patient enrollment, risk that results may not support registration filings with the U.S. Food and Drug Administration, and the risk that Peregrine may not have or raise adequate financial resources to complete the planned clinical programs. Factors that could cause actual results to differ materially or otherwise adversely impact the company's ability to obtain regulatory approval for its product candidates include, but are not limited to, uncertainties associated with completing preclinical and clinical trials for our technologies; the early stage of product development; the significant costs to develop our products as all of our products are currently in development, preclinical studies or clinical trials; obtaining additional financing to support our operations and the development of our products; obtaining regulatory approval for our technologies; anticipated timing of regulatory filings and the potential success in gaining regulatory approval and complying with governmental regulations applicable to our business. Our business could be affected by a number of other factors, including the risk factors listed from time to time in the company's SEC reports including, but not limited to, the annual report on Form 10-K for the year ended April 30, 2010 and the quarterly report on Form 10-Q for the quarter ended January 31, 2011. The company cautions investors not to place undue reliance on the forward-looking statements contained in this press release. Peregrine Pharmaceuticals, Inc. disclaims any obligation, and does not undertake to update or revise any forward-looking statements in this press release.

Peregrine Contact:
Amy Figueroa
Peregrine Pharmaceuticals
(800) 987-8256
[Devi essere iscritto e connesso per vedere questo link]
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"Peregrine Contact" il nome della società non è una gran garanzia!!

Scherzi a parte, sull'epatite C stanno davvero lavorando molto e ci sono farmaci promettenti in arrivo. Oltre a quello da voi riportato anche il Telaprevir e il Boceprevir sempre da abbinarsi a interferone e ribavirina.
Insieme al Bavituximab riescono ad arrivare a percentuali altissime di negativizzazione anche nei genotipi 1 e 4 che con la sola terapia di interferone e ribavirina restavano sempre i più difficili da trattare.

Purtroppo oggi, nei pazienti coinfetti -hiv e hcv- il problema più grave è spesso l'epatite C, essendo nella maggior parte dei casi infezioni molto datate e quindi facili a trasformarsi in cirrosi.

Freddy