Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

PowderMed’s therapeutic DNA vaccine for chronic hepatitis B enters phase I clinical trials in patients

30.03.2006
PowderMed, the immunotherapeutics company focused on the development and manufacture of DNA-based vaccines for viral diseases and cancer, has announced that its dual-antigen encoding immunotherapeutic for Hepatitis B (HBV) has received US IND approval together with approval from the Singapore, Hong Kong and Taiwanese Regulatory Authorities and has entered Phase I Clinical Trials.

The study will primarily evaluate the safety and tolerability of the HBV immunotherapeutic, pdpSC18, administered by PMED™, PowderMed’s needle-free delivery technology, in patients with chronic hepatitis B infection, both in combination with lamivudine and as monotherapy. Additionally, assessments of immunogenicity and clinical response will be made.

Worldwide HBV affects 350 million people and there are no commercially available therapeutic vaccines for the treatment of chronic HBV infection. Chronic infection occurs in 98% of newborn children infected by vertical transmission from the mother (the most common means of transmission in Asia-Pacific), and in 5% of individuals infected after 2 years of age. About 25% of these patients will progress to cirrhosis and 20% of this subgroup will develop hepatocellular carcinoma – one of the most common cancers worldwide.

Welcoming this study and the potential for a novel therapeutic vaccine to HBV, Dr Antonio Bertoletti, of the Center for Molecular Medicine, Singapore, said:

“Patients with chronic hepatitis B show a state of relative hypo-responsiveness of HBV-specific T cells compared with that demonstrated in patients who control the virus replication after acute infection. Therapeutic induction and/or activation of the T-cell response for HBV core and surface proteins may have the potential to control infection. It has been shown that Hepatitis B surface (HBsAg) and core antigen (HBcAg) induces envelope-and core specific CD4+ and CD8+ T-cell responses and that the response against the Hepatitis B core antigen (HBcAg), is often associated with viral control. The combination of these two genes in PowderMed’s pdpSC18 HBV therapeutic DNA vaccine, thus provides a potential mechanism to both clear the virus via the CD8+ response and to overcome unresponsiveness in chronically infected patients via the CD4+ response.”

This Phase I, First Time in Human Study will enrol patients at seven sites in SE Asia (Singapore, Taiwan, Hong Kong) and the USA. Since the immunological response and hepatic tolerability of the hepatitis B immunotherapeutic would be expected to differ considerably between non-infected subjects and subjects with active hepatitis B disease, the Phase I clinical study will enrol subjects with active hepatitis B disease in order to specifically address both safety and immunogenicity in the most predictive manner possible. Each subject will participate in the study for a period of up to 27 weeks, plus a 4-week run-in and screening period. Allowing for the planned safety reviews between dosing cohorts and a 4-month recruitment window, results can be expected during 2007.

Commenting on the trial, Dr John Beadle, PowderMed’s Chief Medical Officer, said:

“Given the limitations of the currently available treatment regimens for chronic Hepatitis B, a regimen, either as a monotherapy or combination, that could provide enhanced clearance of virus, seroconversion, a reduction in resistant strains or a reduction in post-treatment exacerbations of hepatitis would be highly desirable. The concept of a novel DNA therapeutic vaccine to boost the immune response to the virus and promote viral clearance is thus an attractive and timely novel therapeutic strategy in an area of substantial unmet medical need.”

Phase I clinical trials of a prophylactic DNA Vaccine containing only the HBsAg gene (pPWRG7128) in 95 subjects, showed that vaccination via PMED™ was generally well tolerated both locally and systemically, and resulted in seroprotective levels of antibodies and measurable cell-mediated immune responses.

Susan Yu | alfa
Further information:
http://www.northbankcommunications.com
http://www.powdermed.com

More articles from Life Sciences:

nachricht Unique genome architectures after fertilisation in single-cell embryos
30.03.2017 | IMBA - Institut für Molekulare Biotechnologie der Österreichischen Akademie der Wissenschaften GmbH

nachricht Transport of molecular motors into cilia
28.03.2017 | Aarhus University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

'On-off switch' brings researchers a step closer to potential HIV vaccine

30.03.2017 | Health and Medicine

Penn studies find promise for innovations in liquid biopsies

30.03.2017 | Health and Medicine

An LED-based device for imaging radiation induced skin damage

30.03.2017 | Medical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>