PepTcell’s HIV-v vaccine offers new hope in the treatment and protection of HIV as it is the first vaccine to use a new approach for preventing and treating HIV by generating both a very strong B-cell and T-cell response from the immune system against regions of the virus that do not change from variant to variant. These unique features mean that the vaccine can be used to both treat people in the early phase of HIV infection and to protect people from getting the virus in the first place.
Wilson Caparros Wanderley, Chief Scientific Officer of PepTcell, says: “Based on results to date the vaccine produces a very strong response from both arms of the immune system after a single immunisation, even without adjuvant. The response is sufficient to enable the immune system to target and kill human cells infected with the virus and with different variants of the HIV virus.”
The development of an effective vaccine against HIV has been extremely difficult, as HIV constantly mutates, changing how it appears to the immune system. The PepTcell HIV-v vaccine is innovative in that it has been designed to specifically target the key conserved regions of the virus, which are not subject to regular mutation. Its design has significant advantages over other vaccines in that it only delivers those specific parts of the viral proteins that are important in the immune response rather than whole proteins which can trick the immune system in to remembering the wrong parts. The immune system will thus learn to recognise those regions within HIV proteins that are highly conserved and hence present in all different strains of this highly variable virus.
Gregory Stoloff, CEO of PepTcell, says: “This vaccine has been designed after taking into account all the lessons learnt from the prior excellent work undertaken in this field, has employed the latest theories in the understanding of the immune system and the most up to date chemical manufacturing processes available. Therefore, this vaccine has the best chance of any previous attempt to provide the solution that has evaded us to date.
The Phase Ib trial will involve 55 HIV positive volunteers, and will assess both safety and tolerability as well as the effectiveness of the vaccine by monitoring blood levels of the virus and CD4+ T-cell count, an immune cell which is specifically infected with HIV. The trial is expected to run for a year. The multi centre trial will be conducted at a number of HIV units in the UK. Details of the trial will be published at www.clinicaltrial.gov.uk
Stuart Robinson, Head of Business Development at PepTcell says: “This vaccine is an opportunity to change the treatment landscape of HIV infection. The clinical trial being undertaken will vaccinate people in the early phase of HIV infection and monitor the effects on viral load and CD4+ count, both key markers of the progression of HIV disease.”
PepTcell's HIV-v vaccine can be quickly, easily and cost-effectively manufactured. The vaccine components are made synthetically thus allowing for increased purity and more efficient dosing of the vaccine compared to vaccines obtained or delivered via genetically modified organisms. Furthermore, the vaccine remains stable at a range of temperatures making it a viable and credible option for clinical use, not only in developed countries, but also in developing countries where large scale cold storage and distribution are not always available.
About PepTcell Ltd
PepTcell is a privately held biotech company with a focus on the development of vaccines for the prevention and treatment of infectious diseases. It was formed in 2004, and is funded through high net worth individuals. The Company’s portfolio covers three main areas: immunotherapeutics, reprofiled drugs and metabolic disease.
PepTcell has HIV and Influenza vaccine at a clinical stage of development, with Hepatitis B, Hepatitis C, Rotavirus and Malaria at preclinical stages. The Company also has preclinical reprofiling programmes for breast cancer and respiratory and inflammatory disease, and it is working on metabolic disease, with preclinical programs in obesity and diabetes. For further information please visit the website at www.peptcell.com
