Summit Reports Positive Interim Data from New Formulation of SMT C1100 in Duchenne

Summit Therapeutics announced positive interim data from a Phase 1 clinical trial evaluating a new oral formulation of its lead utrophin modulator, SMT C1100, for Duchenne. In this dose escalating clinical trial's initial dosing period, all patients achieved plasma drug levels within the range believed to be necessary for a potential therapeutic benefit. This Phase I trial testing the new formulation is a separate trial to the Phase 2 PhaseOut DMD trial the company has been promoting. The initial dose tested of the new formulation was one tenth of that required with the current formulation of SMT C1100 to achieve similar drug concentration levels tested in the recent Phase 1b modified diet clinical trial of SMT C1100.

Some Questions That You May Have:

  1. What is different about this new formulation? Is it still taken orally?
    The new formulation of SMT C1100 has some modifications, which may help it to be better absorbed. Because of these modifications, the preliminary interim data from the Phase 1 clinical trial suggest that we can reach drug concentrations similar to those observed in the recent Phase 1b modified diet clinical trial of the current formulation of SMT C1100 but with one tenth of the dose. The new formulation is still taken orally.
  2. Does the new formulation still require a balanced diet and a small glass of full fat milk?
    The preliminary interim data described in the release were from patients who followed specific dietary guidance providing for a balanced proportion of fats, proteins and carbohydrates and who took the new formulation with a small glass of full fat milk.
  3. Is the new formulation going to be used in the PhaseOut DMD trial?
    Firm decisions on further development of this new formulation will await full data from the new formulation Phase 1 trial.

Read Summit's Press Release: 

Summit Reports Positive Interim Data from Ongoing Phase 1 Clinical Trial Testing a New Formulation of SMTC1100 in Patients with DMD

Oxford, UK 30 March 2016 - Summit Therapeutics plc (NASDAQ: SMMT, AIM: SUMM), the drug discovery and development company advancing therapies for Duchenne muscular dystrophy ('DMD') and Clostridium difficile infection, announces positive interim data from a Phase 1 clinical trial evaluating a new oral formulation of its lead utrophin modulator, SMT C1100, for DMD. In this dose escalating clinical trial's initial dosing period, all patients achieved plasma drug levels within the range believed to be necessary for a potential therapeutic benefit. The initial dose tested of the new formulation was one tenth of that required with the current formulation of SMT C1100 to achieve similar drug concentration levels in the recent Phase 1b modified diet clinical trial of SMT C1100.


SMT C1100 is a potential disease-modifying therapy for all patients with DMD and is progressing in its current formulation into a Phase 2 proof of concept clinical trial.

"These initial data are encouraging regarding the potential development of an improved formulation that could achieve blood levels of SMT C1100 that are above those observed with our current formulation," said Ralf Rosskamp, MD, Chief Medical Officer of Summit. "We have seen in a prior Phase 1 clinical trial how a balanced diet enables our current formulation to reach blood levels that we believe could provide therapeutic benefit, and our ongoing new formulation development work could provide more insight into the potential benefits of SMT C1100 on utrophin modulation in patients with DMD."

The new formulation Phase 1 clinical trial of SMT C1100 is proceeding to evaluate a higher dose of the new formulation. Firm decisions on further development of this new formulation will await full data from the trial.

About the New Formulation Phase 1 Clinical Trial of SMT C1100
The new formulation of SMT C1100 Phase 1 clinical trial is comprised of two parts. Part A tested two new oral formulations of SMT C1100 in 16 healthy male volunteers. One of these new formulations, which achieved an over ten-fold increase in plasma exposure in healthy volunteers compared to the current formulation of SMT C1100, was selected to progress into Part B of the trial.

Part B of the trial is assessing the pharmacokinetics and safety of up to three dose levels of a new formulation of SMT C1100 taken twice a day for seven days in eight boys with DMD, aged five to nine years. In the initial dosing period of the new formulation Phase 1 trial, patients who received a 250 mg fixed dose of the new formulation of SMT C1100 for seven days achieved plasma levels of the drug similar to those of patients who received a 2,500 mg fixed dose of the current formulation of SMT C1100 in the Phase 1b modified diet trial completed in 2015. The new formulation of SMT C1100 was generally well-tolerated in healthy volunteers and in the patients who received the first dose level of the new formulation of SMT C1100. Patients in this Phase 1 trial are following similar dietary guidance to those in the prior Phase 1b modified diet trial.

About Utrophin Modulation in DMD
DMD is a progressive muscle wasting disease that affects around 50,000 boys and young men in the developed world. The disease is caused by different genetic faults in the gene that encodes dystrophin, a protein that is essential for the healthy function of all muscles. There is currently no cure for DMD and life expectancy is into the late twenties. Utrophin protein is functionally and structurally similar to dystrophin. In preclinical studies, the continued expression of utrophin has a meaningful, positive effect on muscle performance. Summit believes that utrophin modulation has the potential to slow down or even stop the progression of DMD, regardless of the underlying dystrophin gene mutation. Summit also believes that utrophin modulation could potentially be complementary to other therapeutic approaches for DMD. The Company's lead utrophin modulator is an orally administered, small molecule called SMT C1100. DMD is an orphan disease, and the US Food and Drug Administration and the European Medicines Agency have granted orphan drug status to SMT C1100. Orphan drugs receive a number of benefits including additional regulatory support and a period of market exclusivity following approval.

About Summit Therapeutics
Summit is a biopharmaceutical company focused on the discovery, development and commercialisation of novel medicines for indications for which there are no existing or only inadequate therapies. Summit is conducting clinical programs focused on the genetic disease Duchenne muscular dystrophy and the infectious disease C. difficile infection. Further information is available at www.summitplc.com and Summit can be followed on Twitter (@summitplc).

For more information, please contact:
Summit
Glyn Edwards / Richard Pye (UK office) Tel: +44 (0)1235 443 951
Erik Ostrowski / Michelle Avery (US office) Tel: +1 617 225 4455

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