Research Update

Phytopharm PLC 3 December 2003 3 December 2003 Phytopharm plc Commences phase I clinical study of treatment for motor neurone disease Phytopharm plc (PYM: London Stock Exchange) ('Phytopharm') announces today that it has been granted clearance by the US Food and Drug Administration to commence a phase I clinical study, under an investigational new drug (IND) application, to evaluate its patented oral product, PYM50018, which is the lead compound within the P59 programme for amyotrophic lateral sclerosis (ALS, the most prevalent form of motor neurone disease). This residential clinical study will utilise a randomised, double blind, placebo-controlled design. It will evaluate the safety, tolerability and pharmacokinetic profile of single oral doses of PYM50018 that will be escalated across four groups of eight healthy adult subjects. Each group will be assigned a different dose level. It is expected that the results will be reported during the second quarter of 2004. Approximately 350,000 patients suffer from ALS world wide, of which 50% die within 18 months of diagnosis. The financial cost to families of patients is exceedingly high, and it is estimated that in the advanced stage, care can cost an average of $200,000 per year (source: International Alliance of ALS Associations). Current therapy with the only agent indicated for the treatment of this condition increases average survival by only three months (source Datamonitor). There is an urgent need for the development of new approaches to this devastating condition. Phytopharm has developed a large group of patented compounds whose properties provide a platform for the development of novel therapeutic approaches for neurodegenerative disorders. PYM50018 has potent neuroprotective effects that have been demonstrated using various pre-clinical models. Specifically, PYM50018 has been observed to protect against neuronal damage, increase neurite outgrowth, reverse oxidative damage and reverse neuronal apoptosis in vitro. When administered orally to SOD1-G93A mice, a model of ALS, PYM50018 delays the loss of muscle strength and extends survival time. These features make PYM50018 a promising medicine for the treatment of ALS. Dr Richard Dixey, Chief Executive of Phytopharm, said: 'This is the second compound from our neurodegeneration library to enter the clinic, and it is very gratifying to be able to advance this potentially important medicine.' -ENDS- Enquiries: Phytopharm plc Dr Richard Dixey, Chief Executive Tel: 01480 437697 Mobile: 07867 782000 Financial Dynamics David Yates / Ben Atwell Tel: 0207 831 3113 NOTES TO EDITORS Phytopharm plc Phytopharm is a leading company in the development of Botanical pharmaceuticals. Botanicals enable the rapid clinical evaluation of plant medicines in chronic and poorly understood diseases. Where novel modes of action are discovered, such research can form the basis for drug discovery platforms, which enable the development of new medicines and the isolation of single chemical entities of clinical importance. Phytopharm has four drug discovery platforms in full development, for metabolic syndrome, neurodegeneration, inflammation and dermatitis. ALS is a fatal neurodegenerative disease that most commonly strikes people between 40 and 60 years of age. The underlying cause of ALS is unknown, although approximately 5-10% of cases appear to be of familial origin. It is characterized by progressive loss of both lower (spinal cord and brainstem) and upper (cerebral cortex) motor neurones, which leads to severe muscle weakness and wasting, followed by paralysis and death, generally caused by respiratory failure. Phytopharm is developing nine products based on its four drug discovery platforms alongside a number of other projects that are in the early phase of evaluation. More information concerning Phytopharm's activities can be found on its web site at http://www.phytopharm.co.uk. This information is provided by RNS The company news service from the London Stock Exchange

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