MGB Biopharma Announces Successful Outcome from Phase II Clinical Study

Released: Tuesday 19th May 2020

MGB Biopharma Announces Successful Outcome from Phase II Clinical Study with MGB-BP-3 – a Potential New Gold Standard, First-Line Treatment for Clostridium difficile Infection (CDI)

Glasgow, Scotland, May 19th, 2020 – MGB Biopharma, a biopharmaceutical company developing a novel class of anti-infectives, today announces that its Phase II clinical study has met its endpoints of safety, efficacy, and dose selection. The study confirms that MGB-BP-3, an antibacterial, has the potential to become the new gold standard, first-line treatment for CDI.

The Phase II dose ranging study in patients with CDI showed that the 250mg of MGB-BP-3, given twice daily for 10 days, achieved an initial cure and sustained cure of 100%. This dosage regimen has now been confirmed for the next phase of clinical trials.

Three dose levels were evaluated in the study, which was conducted at sites in the United States (US) and Canada. As reported previously, the drug showed better-than-expected efficacy at its lowest dose level (125mg given twice daily) and that trend was further improved, with maximum efficacy demonstrated at the second dose level (250mg given twice daily).

The most important goal in developing a new medicine for the treatment of CDI is to prevent recurrent disease to provide a sustained cure.

MGB-BP-3 achieves this goal by its unique rapid bactericidal activity, a feature shared by no other treatment available. At the 250mg dosed twice daily for 10 days, MGB-BP-3 recorded no disease recurrence measured at four weeks post-therapy. Recurrence is unacceptably high with current bacteriostatic treatments, occurring in up to one third of patients treated by current mainstay therapies.

As in its Phase I study, MGB-BP-3 showed an excellent safety and tolerability profile with no serious adverse events (SAEs) reported in either study.

Dr Thomas Louie, clinical professor at the Cumming School of Medicine at the University of Alberta, Calgary (Canada) and Principal Investigator of the trial, said: “C. difficile infection represents a major burden to the Canadian and US healthcare systems. A novel antibiotic that is able to kill this deadly pathogen before it is able to sporulate offers hope to patients and their families who suffer the pain and misery caused by this disease.”

CDI is a serious and often life-threatening infection of the large intestine and is the most frequent cause of diarrhoea in hospitals and care homes. In the US alone, there are almost half a million cases every year associated with around 30,000 deaths; three people die of uncontrolled CDI each hour.

CDI has been recognised as an urgent threat pathogen by the Centers for Disease Control and Prevention in the US and is a common consequence of antibiotic treatment in hospitalised patients.

MGB-BP-3 has received Qualified Infectious Disease Product (QIDP) status from the FDA, enabling Fast Track submission and 5 years of extended marketing exclusivity. MGB-BP-3 will also be eligible to participate in the DISARM programme of prescribing incentives being considered in the US which will increase patient access to new and innovative treatments.

MGB-BP-3 has a very fast bactericidal effect which can kill C. difficile in its vegetative form before it forms spores, thus achieving initial cure and preventing the disease from recurring by reducing the total burden of C. difficile. Moreover, MGB-BP-3 has very strong bactericidal activity against the BI/NAP1/027 strain, the most virulent strain that is largely resistant to current therapy.

Speed of action is a critical success factor for the treatment of CDI as C difficile bacteria can exist both in a vegetative form that causes disease, and as dormant spores. Fully developed spores, which are resistant to any antibacterial therapy, are formed in a hostile environment commonly caused by antibiotic therapy. Bacteria remain susceptible to antibiotic activity for at least 10 hours during the process of sporulation, providing a period for a fast-acting bactericidal antibiotic such as MGB-BP-3 to kill the bacteria.

The current mainstay treatments of CDI, vancomycin and fidaxomicin, are bacteriostatic and require more than 24 hours to achieve their maximum effect. These characteristics mean that in many patients they trigger sporulation, leading to a high rate of recurrence when the spores germinate back into a vegetative form.

Dr Miroslav Ravic, CEO of MGB Biopharma, said: “We are delighted to have succeeded in meeting our endpoints in this Phase II trial, which is a significant milestone for MGB Biopharma. This study managed to identify a dose that provides a fine balance between maximal killing effects against C. difficile whilst having a minimal effect on the remaining normal gut flora. This results in a very high initial cure rate and prevention of disease recurrence.

As the recent COVID-19 pandemic has demonstrated, the world urgently needs new anti-infective treatments so we can be better prepared for new threats. MGB-BP-3 would bring a new, vastly improved paradigm to the treatment of CDI which would reduce the morbidity and mortality caused by this dreadful infection.”

About MGB Biopharma
MGB Biopharma is a clinical stage company developing a novel class of anti-infectives. Its lead candidate, MGB-BP-3, is an antibacterial which is active against a broad range of important multiresistant and susceptible Gram-positive pathogens. The Company is developing an oral formulation of MGB-BP-3 for the treatment of Clostridium difficile Infection (CDI).

In addition to its C. difficile programme, MGB Biopharma has a pipeline of early preclinical compounds against Gram-positive, Gram-negative, anti-fungal, anti-viral and anti-parasitic pathogens.

MGB Biopharma acquired rights to the proprietary minor groove binder (MGB) platform, developed at the University of Strathclyde, Glasgow, with exclusive worldwide licensing rights for all antiinfective fields. This platform provides an opportunity to develop various compounds with a completely new mode of action which are distinct from the antimicrobial drugs used in clinical practice today. As a result, many MGB-based drugs could have the potential to offer significant advantages over existing anti-infectives.

The Company is currently looking for partners to fully capitalise on the multiple value creating opportunities offered by its broad and innovative anti-infectives platform.

The Company, founded in 2010 and headquartered in Glasgow, Scotland, is backed by Scottish investors including Archangel Investors Limited, Barwell, TRICAPITAL, Syndicate Room and the Scottish Investment Bank, Scottish Enterprise. The company also received significant support for its clinical programme from Innovate UK.

For more information please visit

For further information, please contact:

MGB Biopharma Chris Wardhaugh, Chief Business Officer +44 (0) 1698 464224

Citigate Dewe Rogerson David Dible, Sylvie Berrebi +44 (0) 20 7638 9571 / +44 (0) 7714 306525

View all News