Novel Drug Candidate

Immupharma PLC 08 January 2008 For Immediate Release 8 January 2008 ImmuPharma PLC ImmuPharma enters oncology with novel potential blockbuster drug for multiple cancer indications ImmuPharma PLC (LSE:IMM), ('ImmuPharma' or the 'Company'), the specialist drug discovery and development company, announces today that, as part of its ongoing research collaboration with the Centre National de la Recherche Scientifique ('CNRS'), France's scientific research institution, it has taken the rights for the worldwide development and commercialization of a novel drug candidate for cancer.. The molecule, code-named IPP-204106, has a dual mechanism of action, acting both in preventing angiogenesis as well as proliferation. IPP-204106 is a nucleolin antagonist, the lead molecule in a family of pseudopeptides designed to block the activity of a protein called nucleolin. Located essentially in the nucleus of normal cells where it is protected, nucleolin is much more abundant (often 100 times more) at the surface of the cells which are proliferating as well as the surface of active endothelial cells where it can be a target for antagonist peptides. Cell surface expressed nucleolin is involved in the proliferation processes as well as in cell transformation. It is also a receptor for many growth factors and plays a key role in angiogenesis. Nucleolin antagonists have therefore both anti-angiogenic and anti-proliferative properties. Preclinical data have shown that nucleolin antagonists inhibit the growth of tumours and metastasis in many cancer types. They prevent the implantation of tumours and block angiogenesis. They also inhibit the proliferation of certain types of leukaemia cells. Based on the mechanism of action nucleolin antagonists are active as long as surface nucleolin is present, irrespective of the type of cancer. Preliminary data have also shown the absence of toxicity. In addition to their efficacy as stand-alone agents, nucleolin antagonists may also have a use as selective carriers for cytotoxic drugs and the company has filed patents accordingly. ImmuPharma is planning to complete the formal preclinical development this year with a Phase I expected to start by year end. Dr Robert Zimmer, MD, PhD, ImmuPharma's Chief Scientific Officer, explained: 'Most drugs for cancer are very toxic by default. IPP-204106 is a peptide-like molecule and is not expected to show serious toxicity. If we were to assume that proliferation, adhesion and angiogenesis can be blocked without major safety issues a tremendous achievement in cancer treatment will be obtained.' Dimitri Dimitriou, ImmuPharma's CEO added: 'Entering oncology was a natural progression for ImmuPharma. Our business model of focusing in specialist areas dominated by huge unmet needs fits perfectly with oncology. Furthermore, this exciting new drug candidate has a tremendous commercial potential if it meets its target profile of preventing tumour growth as well as metastasis while being non-toxic.' For further information please contact: ImmuPharma PLC: Dimitri Dimitriou, Chief Executive +44 20 7152 4080 Officer Dr Robert Zimmer, President & Chief + 33 389 32 76 50 Scientific Officer Richard Warr, Chairman +44 20 7152 4080 Buchanan Communications + 44 20 7466 5000 Lisa Baderoon Rebecca Skye Dietrich Panmure Gordon & Co Andrew Burnett +44 151 243 0963 For company information, visit www.immupharma.com Notes to Editors: About ImmuPharma ImmuPharma PLC is a drug discovery and development company headquartered in London, UK and quoted on AIM of the London Stock Exchange (LSE:IMM). It has research operations in France (ImmuPharma (France) SA) and Switzerland (ImmuPharma AG). ImmuPharma is dedicated to the development of novel drugs, largely based on peptide therapeutics, to treat serious medical conditions such as autoimmune diseases characterised by: • blockbuster potential in niche markets • low promotional costs in few specialised physicians and centres and • lower risk of drug development and lower development costs ImmuPharma is a currently developing drug candidates for three different medical conditions, each of which would represent a significant breakthrough in its field. The furthest advanced drug candidate targets Lupus, a disease for which there is currently no cure or specific treatment. The other two address moderate to severe pain (such as that experienced by cancer sufferers and post-operative patients), and MRSA and similar severe hospital-acquired resistant infections. All three have significant sales potential as well as low marketing costs and a relatively low risk of development failure. One or more have the potential to be fast-tracked by the US Food and Drug Administration according to 'Guidance for Industry: Fast Track Drug Development Programs - Designation, Development and Application Review' issued July 2004 and could therefore obtain their market authorization by 2010. Key to the potential success of ImmuPharma is its unique collaborative agreement with Centre National de la Recherche Scientifique, France's scientific research institution. This agreement grants ImmuPharma worldwide exclusive rights to exploit certain key discoveries. In addition to its three leading drug candidates, ImmuPharma has a drug development pipeline using its rights to a virtual chemical library of hundreds of thousands of molecules as well as an innovative technology for converting peptides to drug candidates. ImmuPharma has the option to commercialise its assets itself or to license them to other pharmaceutical companies at an earlier stage. The pipeline Treatment of Lupus (IPP-201101) This is a long-term treatment for Lupus, a chronic, life-threatening autoimmune disease where the immune system attacks healthy cells. There is currently no cure and existing medications only treat the symptoms whereas ImmuPharma's drug candidate has the potential to produce remission of the disease in a substantial proportion of patients. Based on independent forecasts, the value of ImmuPharma's Lupus drug is estimated to be 'substantial' with peak annual sales forecast to generate in excess of $4 billion. Severe pain relief (IPP-102199) ImmuPharma is developing a potential non-addictive compound for relieving moderate to severe pain, such as experienced by cancer sufferers and post-surgical patients. Most existing treatments are derived from the opiate morphine and tend to have serious side effects. ImmuPharma's new treatment is based on met-enkephalin, the body's internal analgesic. IPP-102199 is being developed to have major advantages over morphine such as longer pain relief duration and reduced side effects. The market for chronic opioids in the US currently exceeds $3.5 billion and is growing by more than 10 to 20 per cent a year. Antibiotic for MRSA and similar highly resistant infections (IPP-203101) This is a novel antibiotic to combat MRSA and other severe hospital-acquired, resistant infections which affect some two million people in the US, according to the US Centers for Disease Control and Prevention. ImmuPharma's drug candidate is targeted at disrupting the membrane potential of the bacterial pathogens. It is hoped this novel approach will reduce their potential to become resistant. PLA2 inhibitor for inflammatory and allergic disorders (IPP-201007) Phospholipases A2 (PLA2s) are enzymes that catalyze the hydrolysis of phospholipids. This catalytic reaction is essential in the production of lipids during various processes in the body, involving prostaglandins, leukotrienes, thromboxanes, platelet activation factor and others. In certain cases, such lipids mediators cause allergic reactions and a number of inflammatory conditions such as asthma and other respiratory disorders, rheumatoid arthritis, septic shock and acute pancreatitis are characterized by a significant increase in PLA2 activity. Inhibiting PLA2 can therefore reduce some of these allergic reactions and inhibitors of PLA2 have already been shown to have positive effect in inflammatory conditions. ImmuPharma believes this new molecule has potential in becoming a drug for certain inflammatory conditions and intends to progress its development. The drug could be in phase I trials as early as 2009. This information is provided by RNS The company news service from the London Stock Exchange

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