Rebiotix Inc a clinical stage microbiome company focused on
harnessing the power of the human microbiome to treat challenging diseases, announced that it presented three posters during the American Society for Microbiology’s ASM Microbe 2017, held
June 1-5, 2017 in New Orleans.
Two posters include microbiome data analyses from a randomized placebocontrolled
Phase 2b clinical study featuring RBX2660,
Rebiotix’s Phase 3-ready broad-spectrum
microbiota suspension designed to rehabilitate the human microbiome by delivering live microbes into a patient’s intestinal tract to treat disease.
A third poster was also presented showing a meta analysis
of placebo response rates among recurrentClostridium difficile clinical trials, which provides a field benchmark for future clinical studies.
“The two microbiome analysis posters presented during ASM Microbe 2017 were very important in illustrating the ability of RBX2660 to potentially rehabilitate the microbiome of patients with C. difficile infections. Two separate data analyses from the PUNCH CD2 Phase 2b clinical trial of RBX2660 demonstrated that patients successfully treated with RBX2660 exhibited microbiomes that more closely align with healthy subjects, and that one dose of RBX2660 is sufficient to induce microbiome changes associated with successful outcomes,” stated Lee Jones, president and CEO of Rebiotix.
The poster titled “Changing the Microbiome: Patients with a Successful Outcome Following Microbiota- Based RBX2660 Treatment Trend Toward Human Microbiome Project Healthy Subjects’ Profile,” detailed the results of the PUNCH CD2 Phase 2b trial of the microbiome-based drug, RBX2660.
In this trial, a single dose of RBX2660 demonstrated a significantly better treatment response rate of preventing recurrent Clostridium difficile infections than placebo (67% vs 46%, respectively; p = 0.048).
In a further analysis, investigators determined that patient microbiomes became more diverse and more closely aligned to a healthy microbiome as defined by the Human Microbiome Project (HMP) after treatment with RBX2660, with the largest shift occurring seven days after treatment. 2 The second poster, titled “Resetting the Microbial Landscape: Donor Microbiome Engraftment in Patients Treated with RBX2660 for Multi-Recurrent Clostridium difficile Infection,” further elaborated on the shift of the patient microbiome profile towards the profile of RBX2660. In this poster, 16S rRNA sequencing was performed on stool samples collected from 42 subjects in the RBX2660 treatment arm and 19 RBX2660 drug lots. The RBX2660 microbial profiles had similar taxonomic distributions, with a
group mean that was highly divergent and significantly different from patient baseline microbiome profiles. After RBX2660 treatment, the patients’ microbiomes progressively shifted to more closely resemble RBX2660, with the largest shift occurring 7 days after treatment. Further work is planned to define specific taxa and strains that directly engraft from RBX2660 to the patient. Importantly, this study also confirmed that one dose of RBX2660 is sufficient to support the microbiome change associated
with successful outcome.
About Rebiotix Inc.
Rebiotix Inc. is a clinical-stage microbiome company focused on harnessing the power of the human microbiome to revolutionize the treatment of challenging diseases. Rebiotix is the most clinically advanced microbiome company in the industry, with its lead drug candidate, RBX2660, expected to enter Phase 3 clinical development for the prevention of recurrent Clostridium difficile (C. diff) infection.
RBX2660 has been granted Fast Track status and Breakthrough Therapy designation from the FDA for its potential to prevent recurrent C. diff. infection.
Rebiotix’s clinical pipeline also features RBX7455, a room temperature stable oral capsule formulation, which is currently the subject of an investigator sponsored Phase 1 trial for the prevention of recurrentC. diff. infection. In addition, Rebiotix is targeting several other disease indications with drug products built on its pioneering Microbiota Restoration Therapy (MRT) platform.
MRT is a standardized, stabilized drug technology that is designed to rehabilitate the human microbiome by delivering a broad spectrum of live microbes into a patient’s intestinal tract via a ready-to-use and easy-to-administer format. For more information on Rebiotix and its pipeline of human microbiome-directed therapies, visit www.rebiotix.com
Rebiotix Inc., a clinical-stage microbiome company focused on harnessing the power of the human microbiome to treat challenging diseases, today announced topline results from a controlled open-label Phase 2 trial of RBX2660 (PUNCH™ Open Label) for the prevention of recurrent Clostridium difficile (C. diff.) infection.
Data indicated that RBX2660 was well-tolerated and achieved the primary efficacy endpoint of preventing C. diff. recurrence; patients treated with RBX2660 exhibited a treatment success rate of 78.8% compared with a historical control of 51.8% (p<0.0001). RBX2660 is a broad-spectrum microbiota suspension that is designed to rehabilitate the human microbiome by delivering live microbes into a patient’s intestinal tract to treat disease.
Lee Jones, president and CEO of Rebiotix, stated, “The 78.8% treatment success achieved in this open label Phase 2 trial demonstrates the potential of RBX2660, a broad spectrum microbiota drug product, to rehabilitate the gut microbiome and break the cycle of C. diff. recurrence. These results, coupled with the safety and efficacy data observed in our prior Phase 2b and Phase 2 clinical trials, position Rebiotix to advance RBX2660 into Phase 3 clinical development, solidifying our standing as the most clinically advanced microbiome company in the industry.”
PUNCH™ Open Label was designed as a prospective, multicenter, open-label, controlled Phase 2 study to assess the efficacy and safety of RBX2660for the prevention of recurrent C. diff.
The primary efficacy endpoint involved a comparison of patients treated with RBX2660 to a closely matched set of antibiotic only treated historical controls through 56 days. There were 31 active treatment sites and four control sites in the US and Canada. 132 RBX2660 and 110 historical control subjects were included in this topline analysis.
Actively treated patients, after determining eligibility, were administered two doses of RBX2660; the first at day one and the second at day seven. Patients were then monitored for eight weeks to determine whether there was a recurrence of C. diff.
Top line results from the trial, which examined responses from 132 patients versus a historical control of 110 patients, indicated a treatment success rate of 78.8% as compared to a historical control of 51.8% (p<0.0001). Overall, RBX2660 was generally well-tolerated with the most commonly reported adverse events being gastrointestinal, including diarrhea, abdominal pain, flatulence, constipation and distension.
About Rebiotix Inc.
Rebiotix Inc. is a clinical-stage microbiome company focused on harnessing the power of the human microbiome to revolutionize the treatment of challenging diseases. Rebiotix is the most clinically advanced microbiome company in the industry, with its lead drug candidate, RBX2660, expected to enter Phase 3 clinical development for the prevention of recurrent Clostridium difficile (C. diff.) infection. Previously, RBX2660 was the subject of three Phase 2 trials in recurrent C. diff, including a Phase 2b randomized, double-blind, placebo-controlled trial (PUNCH™ CD2), with data indicating the drug was well-tolerated and demonstrated statistically significant treatment efficacy. RBX2660 has been granted Orphan Drug status, Fast Track status and Breakthrough Therapy Designation from the FDA for its potential to prevent recurrent C. diff. infection.
Rebiotix’s development pipeline includes multiple formulations targeting several disease indications and is built around its pioneering Microbiota Restoration Therapy (MRT) platform. MRT is a standardized, stabilized drug technology that is designed to rehabilitate the human microbiome by delivering a broad spectrum of live microbes into a patient’s intestinal tract via a ready-to-use and easy-to-administer format.
For More Information About C. difficile Clinical Trials In Progress :
Rebiotix Inc., a clinical-stage biotechnology company focused on harnessing the power of the human microbiome to treat challenging diseases, announced on October 11, 2016 that the United States Patent and Trademark Office (USPTO) has issued U.S. Patent No. 9,433,651 to Rebiotix for its patent application entitled, “Microbiota Restoration Therapy (MRT), Compositions and Methods of Manufacture.” The patent covers Microbiota Restoration Therapy (MRT) compositions and methods for manufacturing, processing and delivering the compositions, and builds on Rebiotix’s patent issuances in Australia and Canada.
MRT is a standardized, stabilized drug technology that is designed to rehabilitate the human microbiome by delivering a broad spectrum of live microbes into a patient’s intestinal tract via a readyto-use and easy-to-administer format. The patented technology is based on ground-breaking work that provides an avenue for the treatment of a variety of diseases including Clostridium difficile (C.diff), ulcerative colitis, hepatic encephalopathy and multi-drug resistant organisms.
“This patent covering our MRT platform is a significant addition to Rebiotix’s IP estate as we continue to advance our industry-leading pipeline of microbiome-directed drug therapies, including RBX2660, our Phase 3-ready drug candidate,” stated Lee Jones, Chief Executive Officer of Rebiotix. “Rebiotix has established one of the deepest IP portfolios in the microbiome industry covering an array of subjects, from formulation and storage to delivery and disease targets, that we believe are key to the eventual commercialization of microbiota-based therapeutics.”
Rebiotix Inc. is a clinical-stage biotechnology company focused on harnessing the power of the human microbiome to revolutionize the treatment of challenging diseases. Rebiotix is the most clinically advanced microbiome company in the industry, with its Phase 3-ready drug candidate, RBX2660, having successfully completed a Phase 2b randomized, double-blind, placebo controlled trial as a potential treatment for recurrent Clostridium difficileinfection (PUNCH™ CD2). RBX2660 has been granted Orphan Drug status, Fast Track status and Breakthrough Therapy Designation from the FDA for its potential to treat recurrent C. diff. infection.
Rebiotix’s development pipeline includes multiple formulations targeting several disease indications and is built around its pioneering Microbiota Restoration Therapy (MRT) platform. MRT is a standardized, stabilized drug technology that is designed to rehabilitate the human microbiome by delivering a broad spectrum of live microbes into a patient’s intestinal tract via a ready-to-use and easy-to-administer format. For more information on Rebiotix and its pipeline of human microbiome-directed therapies, visit www.rebiotix.com.
To access the live broadcast and Podcast Library C. diff. Spores and More Global Broadcasting Network please click on the logo above *
“C. diff. Spores and More,” Global Broadcasting Network – innovative and educational interactive healthcare talk radio program discusses
This Episode: Rebiotix: The Leader in Unlocking the Benefits of Microbiota Restoration Therapy (MRT) “
With Our Guest: Lee Jones, Founder and CEO, Rebiotix
Join us today on C. diff. Spores and More discuss Rebiotix
with Rebiotix Founder, CEO Lee Jones. Listen in as we learn more about
the History, Company profile, the problems they are solving, and product information. Lee will explain What is the microbiome? Their first product RBX 2660 – addressing C. diff, with the Rebiotix platform called MRT (Microbiota Restoration Therapy) and how MRT is different
and much more.
MORE ABOUT OUR GUEST:
Lee Jones, CEO and Founder of Rebiotix Inc., is an experienced medical technology executive and serial entrepreneur. With deep experience in the medical devices industry and in managing and advising academic scientists on commercialization efforts, Rebiotix marks her first foray into biotechnology. She is leading a fast-paced effort to develop a new way of treating disease through Microbiota Restoration Therapy (MRT). The company’s first MRT is a biologic drug targeted at recurrent Clostridium difficile infection.
Rebiotix Founder, President, CEO, Privately held biotechnology company founded in 2011 Developing a new category of drugs to harness the human microbiome to treat disease; involves transplantation of live human-derived microbes; first target is recurrent Clostridium difficile infection, Led pioneering work with the US Food and Drug Administration to develop a new classification for the product – RBX2660 – completed Phase 2 clinical testing.
“C. diff. Spores and More ™“ Global Broadcasting Network spotlights world renowned topic experts, research scientists, healthcare professionals, organization representatives,C. diff. survivors, board members, and C Diff Foundation volunteers who are all creating positive changes in the C. diff. community worldwide.
Through their interviews, the C Diff Foundation mission will connect, educate, and empower many worldwide.
Questions received through the show page portal will be reviewed and addressed by the show’s Medical Correspondent, Dr. Fred Zar, MD, FACP, Dr. Fred Zar is a Professor of Clinical Medicine, Vice Head for Education in the Department of Medicine, and Program Director of the Internal Medicine Residency at the University of Illinois at Chicago. Over the last two decades he has been a pioneer in the study of the treatment of Clostridium difficile disease and the need to stratify patients by disease severity.
Listed below you will find information pertaining to organizations who have active clinical trials in progress. Click on each organization’s website listed to review their clinical trial study opportunities — Inquire if you or your loved one qualify to participate in their study.
*Please note: The C Diff Foundation does not endorse any products and/or clinical study in progress. All website postings are strictly for informational purposes only.
Here is a list of Clinical Trial Phases:
Clinical trials are conducted in a series of steps, called phases – each phase is designed to answer a separate research question.
Phase I: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase II: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase III: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase IV: Studies are done after the drug or treatment has been marketed to gather information on the drug’s effect in various populations and any side effects associated with long-term use.
A global, multi-center, randomized, double-blind, placebo-controlled clinical trial to evaluate the ability of SYN-004 to degrade certain IV beta-lactam antibiotics within the GI tract to maintain the natural balance of the gut microbiome for the prevention of C. difficile infection, C. difficile associated diarrhea and antibiotic-associated diarrhea in patients hospitalized for a lower respiratory tract infection and receiving IV ceftriaxone.
On March 1, 2016: Cdiffense Phase III Trial updates discussed with Doctors of Sanofi PasteurTo listen to the Podcast ~ Click on the Sanofi Pasteur Logo below and enjoy listening to the Sanofi Pasteur “Cdiffense” clinical updates.
Sanofi Pasteur, one of the leading vaccine manufacturers in the world, is in the midst of its Phase III clinical trial called Cdiffense to study its investigational vaccine to prevent Clostridium difficile infection (CDI). The trial is now in more than 20 countries across 5 continents to evaluate the safety, immunogenicity and efficacy of an investigational vaccine for the prevention of primary, symptomatic CDI. The investigational C. diff vaccine is designed to produce an immune response that targets the toxins generated by C. diff bacteria, which can cause inflammation of the gut. The investigative vaccine ultimately may help prevent a future infection from occurring. Volunteers for the study should be age 50 or older and planning an upcoming hospitalization or have had at least two hospital stays and have received systemic antibiotics in the past year. For more information on the Cdiffense trial, please visit www.cdiffense.org
Da Volterra is a biopharmaceutical company, privately-held and headquartered in Paris (France), focused on the discovery and development of innovative therapeutic and preventive products for Clostridium difficile and multi-resistant infections. Our most advanced product, DAV132, is designed as a prophylactic treatment intended to prevent the development of C. difficile infection, by binding with and neutralizing common antibiotics in the gut.
DAV132 decreases the risk of triggering CDI by inactivating residual antibiotics in the colon
before they can disrupt the bacterial flora, without impacting the systemic efficacy of the antibiotics.
It is noteworthy that DAV132 is developed to accompany all oral and intravenous antibiotics of any class and would therefore significantly reduce the risks to acquire C.difficile infections for patients at risk (especially patients who had prior episodes). We see DAV132 as a real game changer for C.difficile prevention.
Have a look at our video presenting the mechanism of action of DAV132:
The video is highly illustrative of what C.diff is and how C.diff is triggered.
We have already performed 2 clinical trials with DAV132 and we have a very exciting dataset (both preclinical and clinical) suggesting that DAV132 will very effectively prevent C.diff infections. I would be happy to exchange with you more information on this. Our next clinical trial, in patients actually treated with antibiotics and at-risk of C.diff, will start in Q4 2015 or early 2016.
ValnevaAnnounces Start of Phase II Clinical Trial of its Clostridium difficile vaccine candidate
First Study participant(s) enrolled in Phase II trial which aims to enable Phase III entry upon successful completion
Study to enroll 500 healthy subjects aged 50 years and older in the United States and Germany
First results are expected in Q4 2015
Lyon (France), December 18, 2014 – European biotechnology company Valneva SE (“Valneva”) announced today the initiation of the Phase II clinical trial of its VLA84 prophylactic vaccine candidate against Clostridium difficile (C. difficile), the main cause of nosocomial diarrhea. Data from the Phase I study in healthy elderly and adults showed good safety and immunogenicity of the vaccine candidate, and indicated functionality of induced antibodies, supporting the Company`s decision to progress the vaccine
candidate into Phase II
C. diff. Infection (CDI) Treatments On the Horizon
Seres Therapeutics is a clinical-stage therapeutics company focused on discovering and developing drugs to treat diseases of the microbiome. The biology of the microbiome is driven by ecologies—the functional collections of various organisms—which are central to health and disease. Seres is developing Ecobiotic® therapeutics to treat diseases where an abnormal (unhealthy) microbiome is a significant factor in the underlying cause of the disease. Our first clinical program, The ECOSPOR Research study is in the treatment of recurrent Clostridium difficile infection. About The ECOSPOR Research Study Although antibiotics are used to treat recurrent C. difficile infection, most of the time they do not cure C. difficile. In addition, antibiotics continue to wipe out the good bacteria that protect you
against C. difficile. Currently, there are no medications available that can prevent this infection from coming back when your gut is defenseless.
SER-109 is an investigational medicine being developed to prevent recurrent C. difficile from coming back again. The idea is to first treat patients with antibiotics that work against C. difficile so that the diarrhea goes away. Then patients may get SER-109 to keep the C. difficile infection from coming back.
In the ECOSPOR study, doctors will compare SER-109 to a placebo pill, which looks like SER-109. However, the placebo pill will have no medication inside it. Patients will be randomly assigned to receive either SER-109 or placebo. The study is designed to provide more information about the potential safety and effectiveness of SER-109, and will last about 7 months. The results will help doctors and researchers learn whether SER-109 could one day be used to prevent recurrent CDI.
Who Is Eligible For The ECOSPOR Study?
To pre-qualify for this study, a person must:
• Be 18 years of age or older
• Have a history of at least 3 episodes of Clostridium difficile Infection (CDI) in the last 9 months, including the current episode
• Not have active irritable bowel syndrome with diarrhea within the previous 24 months
All study-related visits, tests, and medication will be provided to the study patients at no cost. In addition, reimbursement for time and travel may be provided.
How to Enroll in the study? The ECOSPOR Study is now open for enrollment. It is posted onClinicalTrials.gov.All the sites which are enrolling patients are listed on clinicaltrials.gov, including contact information for the sites. If a doctor in the study thinks you may be a good candidate, you will be given complete information about the study including everything you should know before you join. You can also contact firstname.lastname@example.org to find a doctor near you who is involved in the study.
To LISTEN to Dr. Shelley Trucksis, Ph.D., M.D., and Dr. David Cook, Ph.D. discuss “Ecobiotics- A Novel Approach to Recurrent C. difficile infections” Click on the Seres Therapeutics Logo below:
Seres Therapeutics, a leading microbiome therapeutics company, which recently published in the Journal of Infectious Diseases, positive results from an open-label Phase 1b/2 study of SER-109 for the treatment of patients with recurrent C. difficile infections (CDI). Seres Therapeutics is creating a new class of medicines to treat diseases resulting from functional deficiencies in the microbiome, a condition known as dysbiosis. New insights into the human microbiome are fundamentally reshaping how we understand and treat a wide range of diseases, creating new possibilities for patients not served by current therapeutic approaches. Ecobiotics are ecological compositions of beneficial organisms that are designed to reestablish a healthy microbiome. The discovery efforts at Seres Therapeutics currently span metabolic, inflammatory, and infectious diseases. 2016
Summit Therapeutics has reported ‘outstanding’ results in the phase II trial of ridinilazole, its new C.difficile infection (CDI) treatment.
During the trial, the new oral antibiotic significantly outperformed vancomycin, the current standard prescription, which was the primary objective said Summit.
Over two-thirds (66.7%) of those treated showed a sustained clinical response (SCR) against 42.4% for vancomycin.
The statistical superiority was driven by a large numerical reduction in recurrent disease compared with vancomycin, which Summit said was key as recurrence is one of the hardest things to stop.
C.difficile or CDI is a growing danger for patients in hospital, care homes and the wider community.
Annually, there are between 450,000 and 700,000 cases in the US alone, with the elderly and sick especially vulnerable.
One study has suggested it costs US $4.8bn to treat these people.
“The healthcare community is acutely aware of the major threat CDI poses, particularly given widespread antibiotic use and our aging population,” said Glyn Edwards, Summit’s chief executive.
The biggest unmet need in CDI treatment is reduce recurring cases, he added and the results from the latest trial had exceeded its ‘wildest expectations’.
“These outstanding clinical data from CoDIFy strongly support the profile of ridinilazole as a narrow spectrum antibiotic.
“There is a vital need for potent new antibiotics, and the potential of ridinilazole has attracted great interest.
Edwards added that the results from the CoDIFy trial were exceptionally encouraging and the aim no is to advance ridinilazole into Phase 3 clinical trials.
Here, the company would evaluate partnership opportunities against the benefit of it forward itself, he added.
Professor Mark Wilcox, at Leeds University and Public Health England’s lead consultant on C.difficile added that the latest data indicated ridinilazole could become an important new treatment option for CDI with the potential to reduce the high rates of recurrent disease that remain a key clinical challenge.
CoDIFy was a double blind, randomised, active controlled, multicentre, Phase II clinical trial that evaluated the efficacy of ridinilazole against vancomycin in 100 patients in the US and Canada.
Results from a second CoFIFy trail are due next year, though Edwards said the results announced today would provide the bulk of the quantitative data.
ridinilazole has already received Qualified Infectious Disease Product, or QIDP, designation and has been granted Fast Track status from the US Food and Drug Administration
Rebiotix Inc. is a clinical stage biotechnology company founded to revolutionize the treatment of debilitating diseases by harnessing the power of the human microbiome. Microbiota Restoration Therapy (MRT) is the company’s platform for delivering live microbes into a sick patient’s intestinal tract to treat disease.
PUNCH™ CD is the name of Rebiotix’s clinical program to assess the safety and efficacy of RBX2660 for the treatment of recurrent Clostridium difficile (C. diff.) infection. It is the most advanced human clinical program evaluating a microbiota-based drug conducted in coordination with the U.S. Food and Drug Administration (FDA) with the goal of developing and commercializing a new therapy to treat patients with recurrent episodes of C. diff. infection. Rebiotix has completed enrollment its PUNCH CD 2 study and continues to assess the safety and efficacy of RBX2660.
PUNCH™ CD 2
Rebiotix has completed enrollment in its PUNCH CD 2 study, a Phase 2B multi-center, randomized, double-blind, placebo-controlled trial to evaluate RBX2660 for the treatment of recurrent C. diff. infection. A total of 117 patients recruited at more than 20 sites in the U.S. and Canada were enrolled in the study, which is the largest randomized controlled study of a MRT for recurrent C. diff. to date.
In this study, the patients received either the microbiota-based drug or a placebo via enema. Neither the doctor nor the patients knew what treatment was received in order to get an unbiased measurement of the drug’s true effectiveness. If a patient’s C. diff. infection symptoms returned, even if they were in the placebo arm of the study, they may have been eligible to receive RBX2660. This is referred to as the open-label portion of the study.
The PUNCH CD study, which was a Phase 2 open label safety and preliminary efficacy study of RBX2660, was successfully completed in July 2014. An open label study means everyone enrolled in the study got the treatment and it is generally the first phase of a new product development program. The study demonstrated a success rate of 87% for those treated with no serious adverse events related to either the product or the method of delivery.
Rebiotix is currently exploring the feasibility of an oral formulation, RBX7455, for the prevention of C. diff.
In addition, Rebiotix is leveraging their years of knowledge and experience to develop MRT applications for other conditions that result from disruption of the gut microbiota.
Merck & Co. will file the first antibacterial monoclonal antibody by the end of 2015, the company says.
bezlotoxumab was successful in two Phase III trials against the recurrence of
Clostridium difficile (C. difficile) infection when combined with antibiotics.
Merck plans to file new drug applications for the monoclonal antibody in the US, Canada and EU by the end of the year. Currently, there are no therapies approved for the prevention of recurrent disease caused by C. difficile.
Bezlotoxumab’s approval would also make it the first antibody to treat bacterial infection.
Scientists say mAbs would have benefits over small molecule antibiotics because they are less likely to drive antimicrobial resistance and are administered less frequently. “Results of these studies showed that a single, one-time infusion of the antitoxin bezlotoxumab given with standard of care C. difficile antibiotic treatment significantly reduced the recurrence of C. difficile infection compared to standard of care alone, and demonstrated this benefit over a 12-week period,” said lead investigator Mark Wilcox of the University of Leeds, UK. “These results were also demonstrated in patient subgroups known to be at high risk for C. difficile recurrence.”
C. difficile toxin B can damage the gut wall and cause inflammation, leading to the symptoms of C. difficile enteritis, which include abdominal pain and watery diarrhea. Bezlotoxumab, a fully-human monoclonal antibody, was developed by researchers at the University of Massachusetts Medical School’s MassBiologics Laboratory with Medarex (now part of Bristol-Myers Squibb), and licensed to Merck in 2009.
The studies Merck’s studies took more than 1,000 patients each and evaluated them over 12 weeks. Participants received either a single infusion of bezlotoxumab, actoxumab (another mAb designed to fight C. difficile),a combination of the two, or a placebo. The actoxumab arm of the study ended early for efficacy and safety reasons. Both studies had infection recurrence as their primary endpoint – this rate was significantly lower for the bezlotoxumab arms (17.4% and 15.7%) and bezlotoxumab plus actoxumab arms (15.9% and 14.9%), compared to placebos (27.6% and 25.7%). Actoxumab was found not to provide extra benefit on its own or combined with bezlotoxumab, so Merck’s marketing authorisation application is for bezlotoxumab alone.
To Listen to the Podcast — MERCK’s Dr. Nicholas Kartsonis discusses the many contributions of Merck and ongoing research addressing CDI — and the history in addressing infectious disease and antimicrobial resistance. Dr. Nick Kartsonis also discusses the future in the area of C. diff. and some of the company’s current treatments, including DIFICID and their ongoing research addressing CDI Click on the MERCK Logo Above *
DIFICID (fidaxomicin) is currently FDA approved to treat Clostridium difficile-associated diarrhea (CDAD) in adult patients 18 years of age and older.
Currently, clinical trials are ongoing to assess the efficacy and safety of DIFICID, in either a tablet and oral suspension formulation, in pediatric patients with CDAD. ** In addition, DIFICID is currently in clinical trials to determine the efficacy of use as a prophylaxis against CDAD in adult patients undergoing hematopoietic stem cell transplantation (HSCT).
XBiotech is a biotech company located in Austin, Texas and was founded on the concept of the “True Human Antibody”. Antibodies are specialized proteins, which are produced by the immune system. Their function is to bind to a very specific target, such as a virus or bacteria, and aid in the elimination of these targets by the immune system. Monoclonal antibodies were developed as a class of drug, which use the specific targeting function of the antibody to target substances that cause disease. Currently approved monoclonal antibodies however, are developed in the laboratory or in mice. XBiotech’s approach is to isolate antibodies that are present naturally in healthy human donors, and develop these into products that can be used to treat disease. We believe that antibodies isolated from humans, will be safer and will function better than so called antibodies marketed as “fully human”, which are in fact engineered.
Over the past decade, Clostridium difficile (C. diff) has emerged as a significant public health threat. In fact, the CDC has designated it as an “Urgent threat level.”
In October 2015, XBiotech announced it had set out to develop a first-in-class oral monoclonal antibody against C. diff infection. Just two weeks after this announcement, the Company reported it had already identified positive blood samples for anti-clostridium difficile antibodies after screening blood donations from healthy volunteers.
XBiotech’s plans to develop an antibody therapy that directly targets and neutralizes the bacteria. The Company intends to deliver the therapy orally, targeting C. diff in the gastrointestinal tract, where the antibody could reduce the bacteria’s ability to establish debilitating or life threatening infections.
Click on the XBiotech LOGO to the left to listen to the February 2016 XBiotech Podcast which introduces XBiotech, developer of True Human(TM) therapeutic antibodies. XBiotech has an exciting pipeline of product candidates in various areas of medicine. The Company recently announced the launch of a research and development program to develop a first-in-class oral monoclonal antibody against Clostridium difficile (C.difficile) infection. The Company will discuss the need for an effective C.difficile therapy, their novel approach to treating the disease as well as efficiency in their manufacturing technology. Join guests: Dr. Michael Stecher, Medical Director, Dr. Sushma Shivaswamy, Vice President of Research and Development, and Kelly Thornburg, Senior Vice President of Operations, as they discuss how XBiotech is pioneering a new era in the discovery and development of targeted antibodies therapeutics.