Scancell’s first cancer vaccine, SCIB1, is being developed for the treatment of melanoma and is in Phase I/II clinical trials.
SCIB1 is a plasmid DNA which encodes a human antibody molecule engineered to express two cytotoxic T cell epitopes derived from the melanoma antigens Tyrosinase-Related Protein 2 (TRP2) and gp100 plus two helper T cell epitopes. Following immunisation, the engineered antibody is expressed and taken up by dendritic cells, resulting in the development of immune responses against tumour cells expressing the TRP2 and gp100 antigens. The major advantage of the Immunobody® technology is that the Fc component of the engineered antibody will be recognised by the high affinity CD64 receptor present on dendritic cells, leading to a significant enhancement of both the frequency and avidity of the T cell immune response. The induction of high avidity T cells against TRP-2 and gp100 destroys both primary and metastatic tumours, leading to longer progression free survival.
Scancell is conducting a Phase I/II clinical trial of SCIB1, its DNA ImmunoBody® vaccine being developed for the treatment of melanoma. The trial is being carried out at clinical sites in Nottingham, Manchester, Guildford, Leeds and Southampton. .
The trial is an open label, non-randomised study to determine the safety and tolerability of four doses of SCIB1 administered intramuscularly using an electroporation device (TDS-IM, manufactured by Ichor Medical Systems, USA). The study will also assess immune effects and anti-tumour activity in patients with melanoma. The trial is being conducted in patients with both unresected and resected disease.
Patients with Stage III or Stage IV melanoma received up to five doses of the SCIB1 vaccine over a 6 month period. In addition some patients are being given long term treatment every 3-6 months for up to 5 years. The results to date have been highly encouraging.
All 20 patients with resected tumours are still alive and only five have progressed. This compares very favourably with data from historical controls.
Further information on the study can be obtained at:
Melanoma patients are advised to consult their doctor for advice regarding their treatment.
Lindy G. Durrant, Rachael L. Metheringham and Victoria A. Brentville
Wei Xue, Victoria A. Brentville, Peter Symonds, Katherine W. Cook, Hideo Yagita, Rachael L. Metheringham and Lindy G. Durrant
Wei Xue, Rachael L. Metheringham, Victoria A. Brentville, Barbara Gunn, Peter Symonds, Hideo Yagita, Judith M. Ramage and Lindy G. Durrant
Victoria A. Brentville, Rachael L. Metheringham, Barbara Gunn, Peter Symonds, Ian Daniels, Mohamed Gijon, Katherine Cook, Wei Xue and Lindy G. Durrant
High avidity cytotoxic T lymphocytes can be selected into the memory pool but they are exquisitely sensitive to functional impairment (2012)
Victoria A. Brentville, Rachael L. Metheringham, Barbara Gunn and Lindy G. Durrant
Using monoclonal antibodies to stimulate antitumour cellular immunity (2011)
Lindy Durrant, Victoria Pudney and Ian Spendlove
Vaccines as early therapeutic interventions for cancer therapy: neutralising the immunosuppressive tumour environment and increasing T cell avidity may lead to improved responses (2010)
Lindy Durrant, Victoria Pudney, Ian Spendlove and Rachael Metheringham
DNA vaccination with T-cell epitopes encoded within Ab molecules induces high-avidity anti-tumor CD8 T cells (2009)
Victoria A. Pudney, Rachael L. Metheringham, Barbara Gunn, Ian Spendlove, Judith M. Ramage and Lindy G. Durrant
Antibodies designed as effective cancer vaccines (2009)
R.L. Metheringham, V.A. Pudney, B. Gunn, M. Towey, I. Spendlove and L.G. Durrant
Executive chairman John Chiplin said new CEO Dr Cliff Holloway's extensive experience and accomplishments speak volumes
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“We are continuing to explore a number of funding options to ensure that we have the resources to progress these programmes through their next phase”
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Chief scientific officer Lindy Durrant presented two posters at the International Cancer Immunotherapy conference in Germany on Friday
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