SCIB1 continues to deliver compelling survival data in melanoma

Scancell to present update at the Oxford Technology VCT AGM and Proactive Investors One2One Forum

Scancell Holdings plc, (‘Scancell’ or the ‘Company’) the developer of novel immunotherapies for the treatment of cancer, today provides an update from the SCIB1 Phase 1/2 clinical trial in malignant melanoma, the lead programme from the Company’s ImmunoBody® platform and will be presenting at the Oxford Technology VCT AGM and Proactive Investors One2One Forum later this week.

Dr Richard Goodfellow, CEO of Scancell, said: “SCIB1 continues to deliver compelling survival data in patients with resected Stage III/IV melanoma. It is particularly interesting to note that there has only been one new case of disease progression since November 2013 in the resected patients receiving 4mg doses of SCIB1, which gives us hope that SCIB1 might offer curative potential in this currently untreated patient group.”

Dr Keith Flaherty, Director of the Termeer Center for Targeted Therapy at the Massachusetts General Hospital Cancer Center and Professor of Medicine at Harvard Medical School, commented: “The SCIB1 overall survival and progression free survival data generated to date go well beyond established norms for this group of melanoma patients. We have a lot of enthusiasm for validating these results in subsequent trials.”

SCIB1 Survival Update

As of 27 June 2016, SCIB1 continues to deliver strong survival data:

  • Currently 19 of the 20 patients with resected tumours at study entry remain alive
  • One patient who first experienced disease progression in September 2013 died in April 2016, despite additional treatment with checkpoint inhibitors and radiation therapy
  • Of the 16 patients who received 2-4mg doses of SCIB1 Median observation time since entry is 46 months and 52 months since first diagnosis of metastatic disease
  • Only five patients have progressed and one has died
  • Only one new incidence of disease progression has been seen since November 2013
  • Of the four patients who received 8mg doses of SCIB1 (recruited after lower dose cohorts)
  • Median observation time since entry is 16 months and 21 months since first diagnosis of metastatic disease
  • None have progressed and none have died
  • As announced on 17 June 2016, treatment for the eight patients in the long-term continued dosing phase has been suspended due to the clinical trial supplies no longer being within the original specification
  • New SCIB1 material being manufactured to support a new study of SCIB1 in combination with a checkpoint inhibitor will also be made available to these continuation patients (subject to regulatory approval)
  • New SCIB1 material will be ready for use in approximately 9-12 months
  • Plans for the US clinical study of SCIB1 in combination with a checkpoint inhibitor remain on track
  • The final Clinical Study Report, which will be issued later this year, will provide safety, immunology and clinical data from all patients up to 29 October 2015 (the date of the last patient’s dose in the main study) to support our US regulatory submission

Investor Events

Proactive One2One Forum, 7 July 2016 – Dr Richard Goodfellow
The event will commence at 6.00pm at the Chesterfield Mayfair Hotel, 35 Charles Street, Mayfair. Attendance is free. Proactive Investors One2One Forums have rapidly gained global recognition for companies to present
to an audience of astute high net worth investors, fund managers, private client brokers and analysts. See Proactive Investors website for more details:

Oxford Technology VCT AGM, 8 July 2016 – Dr John Chiplin

Scancell will be speaking as part of the portfolio review at the Oxford Technology VCT AGM which commences at 11am at the Magdalen Centre, Oxford Science Park, Oxford OX4 4GA. The Company will provide a corporate presentation and will provide an update on its immunotherapy platform technologies:

  • ImmunoBody® - Best-in-class DNA vaccine technology for use in combination with checkpoint inhibitors or as monotherapy for patients with resected disease
  • Moditope® - Novel immunotherapy that destroys tumours and extends survival without the need for checkpoint inhibition

For Further Information:

Dr John Chiplin, Executive Chairman

Dr Richard Goodfellow, CEO

Scancell Holdings Plc

+1 858 900 2646

+ 44 (0) 20 3727 1000

Freddy Crossley (Corporate Finance)

Maisie Atkinson (Sales)

Panmure Gordon & Co

+44 (0) 20 7886 2500

+44 (0) 20 7886 2905

Mo Noonan/Simon Conway FTI Consulting + 44 (0) 20 3727 1000

About Scancell
Scancell is developing novel immunotherapies for the treatment of cancer based on its ImmunoBody® and Moditope® technology platforms.
Scancell’s first ImmunoBody®, SCIB1 is being developed for the treatment of melanoma. Data from the Phase 1/2 clinical trial demonstrate that SCIB1, when used as monotherapy, has a marked effect on tumour
load, produces a melanoma-specific immune response and highly encouraging survival trend without serious side effects. In patients with resected disease there is increasing evidence to suggest that SCIB1 may delay or prevent disease recurrence.

Scancell’s ImmunoBody® vaccines target dendritic cells and stimulate both parts of the cellular immune system: the helper cell system where inflammation is stimulated at the tumour site and the cytotoxic Tlymphocyte or CTL response where immune system cells are primed to recognise and kill specific cells.

Pre-clinical data on a combination of SCIB1 or SCIB2 and checkpoint inhibition (blockade of the PD-1 or CTLA-4 immune checkpoint pathways) have shown enhanced tumour destruction and significantly longer
survival times than when either treatment was used alone.

Scancell has also identified and patented a series of modified epitopes that stimulate the production of killer CD4+ T cells that destroy tumours without toxicity. The Directors believe that the Moditope® platform could
play a major role in the development of safe and effective cancer immunotherapies in the future.