Tag Archives: C. diff. clinical study

Rebiotix Announces Expansion of Phase 1 Study For Prevention of Recurrent C.diff. Infection Oral Capsule Microbiota Product RBX7455

Rebiotix Announces Expansion of Phase 1 Trial of the Company’s Oral
Capsule Microbiota Product, RBX7455, Following Successful Completion of
Initial Study Arms

Additional cohorts to examine potential of reduced dosing regimens of RBX7455 for the prevention of recurrent Clostridium difficile infection

Rebiotix Inc., a clinical-stage microbiome company
focused on harnessing the power of the human microbiome to treat challenging diseases, announced on November 30, 2017
an expansion of the investigator sponsored Phase 1 study of RBX7455 for the prevention of  recurrent Clostridium difficile (C. diff.) infection. The expansion follows the successful completion of the study’s two initial cohorts and is intended to explore reduced dosing regimens of RBX7455 in two new treatment arms. RBX7455 is a lyophilized, non-frozen oral capsule formulation of Rebiotix’s Microbiota Restoration Therapy™ (MRT), 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.
“Expansion of the Phase 1 study is a key advancement in the development of RBX7455 as it provides an opportunity to explore the potential efficacy of reduced dosing regimens of our oral capsule product in the prevention of recurrent C. diff. infection,” stated Lee Jones, president and CEO of Rebiotix. “RBX7455 is a ground-breaking product in that its oral capsule design is the first in the microbiome industry not requiring storage in frozen conditions. As such, patients are able to administer RBX7455 at home as they would a typical oral capsule medication, which potentially makes RBX7455 ideally suited for diseases where chronic or repeat dosing is required.”
The Phase 1 study of RBX7455 is an investigator sponsored, prospective, single center, proof of concept dosing study of RBX7455 for the prevention of recurrent C. diff. infection. The first two arms enrolled 10 patients per arm (20 total). The expansion of the Phase 1 study adds two additional arms, which will enroll approximately 10 patients per arm (20 total) with reduced dosing regimens from the 2
first two arms. Rebiotix expects data from the first two cohorts of the Phase 1 study of RBX7455 to be released publicly by mid-2018.
In addition to the expanded Phase 1 study of RBX7455, Rebiotix’s clinical development pipeline is highlighted by the company’s ongoing Phase 3 clinical trial of RBX2660 for the prevention of recurrent C. diff. infection. RBX2660 is the first and only microbiome drug to be tested in three separate Phase 2 trials, with more than 300 subjects having been treated with the microbial therapy.
Recently, Rebiotix announced the presentation of research from the RBX2660 Phase 2 program demonstrating measurable evidence of the drug’s rehabilitative effect on the human microbiome and the potential advantages of its broad consortia design.
Ms. Jones continued, “We look forward to the continued progress of the RBX7455 Phase 1 study as well as our Phase 3 study of RBX2660, our lead microbiome drug candidate. Importantly, since both drugs were developed with our MRT platform, we can leverage knowledge from the extensive RBX2660 clinical program, as well as research into the drug’s rehabilitative impact on the gut microbiome, to inform and expedite the development of RBX7455.”
About Rebiotix Inc.
Rebiotix Inc. is a late-stage clinical microbiome company focused on harnessing the power of the human microbiome to revolutionize the treatment of challenging diseases. Rebiotix possesses a deep and diverse clinical pipeline, with its lead drug candidate, RBX2660, in Phase 3 clinical development for the prevention of recurrent Clostridium difficile (C. diff.) infection. RBX2660 has been granted Fast Track status, Orphan Drug and Breakthrough Therapy designation from the FDA for its potential to prevent recurrent C. diff. infection.
Rebiotix’s clinical pipeline also features RBX7455, a lyophilized nonfrozen,
oral capsule formulation, which is currently the subject of an investigator-sponsored Phase 1 trial for the prevention of recurrent C. diff. infection. In addition, Rebiotix is targeting several other disease states with drug products built on its pioneering Microbiota Restoration TherapyTM (MRT) platform.
MRT is a standardized, stabilized drug technology that is designed to rehabilitate the human microbiome by delivering a broad consortium 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

Inquire and Consider Becoming A Candidate In a C. difficile Infection Clinical Trial To Help You – Help Them – Help Others

Every scientific research and development, every clinical trial in progress is a glimmer of hope………..HOPE for clinically safe and approved avenues to prevent and treat a
C. difficile infection
.

 

 

Listed below you will find a web link that will redirect you to obtain information that pertains to organizations who have on-going
C. difficile Prevention and Treatment clinical trials in progress.  

Click on each organization’s website link to review their research and clinical trial study opportunities — Inquire if you or your loved one qualify to participate in a study. Please direct all clinical trial questions to the companies offering the clinical trials.  Thank you.

To Learn More About Clinical Trials —

ClinicalTrials.gov is a registry and results database of publicly and privately supported clinical studies of human participants conducted around the world. Learn more About Clinical Studies and About This Site, including relevant History, Policies, and Laws.  Click on the link below to be redirected to the clinicaltrials.gov website:

https://clinicaltrials.gov/

 

Clinical Studies In Progress To

Help You — Help Them — Help Others  ♥

 

 

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.

Additional Resource Information on clinical trials can be found at http://clinicaltrials.gov/info/resources

 

To review C. difficile Clinical Trials Available Today, please click on the following link to be redirected:

https://cdifffoundation.org/clinical-trials-2/

 

 

 

 

DISCLAIMER
“The C Diff Foundation’s mission is to educate and advocate for Clostridium difficile infection prevention, treatments, support, and environmental safety worldwide.
The C Diff Foundation’s organization is comprised of 100% volunteering members who are dedicated to our mission and adhere to the Foundation’s Code of Ethics
which prohibits paid endorsements and/or paid promotion of products, services, medications, or clinical studies in progress.   All website postings are strictly for
information purposes.
All website entries, public presentations, and workshops are to raise C. diff. infection awareness in all areas of the C Diff Foundation’s mission statement, including infection prevention, diagnostics, sepsis, healthcare-associated infections, antimicrobial resistance, antibiotic stewardship and provide education on all the above.”

Seres Therapeutics Share Key Findings From Earlier Reported SER-109 Phase 2 Clinical Study Outcome

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As published in Seres Therapeutics Press Release  January 31, 2017

 

Findings suggest that both misdiagnosis of C. difficile recurrent infection in some patients, and dosing that may have been suboptimal in certain patients, contributed to the previously reported SER-109 Phase 2 study outcome –

FDA discussions are ongoing regarding a new, redesigned clinical study for SER-109

CAMBRIDGE, Mass., On January 31, 2017 —Seres Therapeutics Inc., a leading microbiome
therapeutics platform company, reported that it has completed in-depth analyses of the previously reported SER-109 Phase 2, eight-week clinical study data in patients with multiply recurrent Clostridium difficile infection.

The company also reported the full, 24-week SER-109 Phase 2 study results and open label extension study data.

“Since obtaining the unexpected SER-109 clinical study results last summer, we have undertaken a comprehensive assessment of the program to understand the reasons for the results,” said Roger J. Pomerantz, M.D., President, CEO and Chairman of Seres.

“We have now identified specific factors that we believe contributed to the Phase 2 results, including issues related to both the accurate diagnosis of C. difficile recurrent infection, and potential suboptimal dosing of certain subjects in the trial. The SER-109 analyses were recently shared with the FDA, and we are actively discussing the design of a new clinical trial for SER-109. There remains a compelling need for an effective, safe, and convenient FDA approved therapy for patients with recurrent C. difficile infection, and this investigation provides insights to guide further clinical development of SER-109.”

Investigation Summary: C. difficile Diagnosis: Analysis was conducted to evaluate both the role of C. difficile diagnostic testing in defining the correct SER-109 Phase 2 study entry population, and in the proper diagnosis of C. difficile recurrences during the study. In the Phase 2 study, 81% of study subjects (72 of 89 subjects) were enrolled based on polymerase chain reaction (PCR) based testing for C. difficile, as well as clinical evaluation. An important and increasingly well-appreciated limitation of PCR testing is that while a positive result indicates that C. difficile cytotoxin genes are present, a positive PCR test does not necessarily indicate thatthe organism is viable and producing disease causing cytotoxins, nor that
C. difficile is the source of clinical symptoms.1

Two separate observations were made pertaining to the effects of discordant results from PCR and cytotoxin assay on the SER-109 trial. The qualifying stool samples evaluated for Phase 2 study entry were not available for retesting for cytotoxin, however, the company was able to retest the samples associated with patients entering the open label extension trial for the presence of the C. difficile cytotoxin and determined that only 44% of samples (15 of 31 subjects) that tested positive by PCR testing also tested positive based on C. difficile cytotoxin assay. These results suggest that a substantial proportion of patients who entered the SER-109 Phase 2 study may have been C. difficile carriers and, therefore, C. difficile infection may not have been the source of the clinical symptoms. In addition, data from this analysis suggest that the use of PCR to measure C. difficile may have overestimated study recurrences in both treatment arms of the Phase 2 trial, further complicating interpretation of study results. This was shown by reanalysis of samples with cytotoxin assay, from patients diagnosed as recurrent in the Phase 2 study. In this retesting, between one quarter andone half of presumed study recurrences may not have been true C. difficile infections leading to pathology.

From the analyses described above, the company believes that misdiagnoses may have occurred both in some patients entering the SER-109 trial, as well as for recurrences diagnosed during the trial.

SER-109 Pharmacokinetics, Pharmacodynamics, & Dosing

The company performed an in-depth analysis to examine SER-109 biological activity in the Phase 2 trial, as measured by microbiome changes in patients and downstream biological effects in the gastrointestinal tract. Results demonstrated a statistically significant increase in the richness of commensal spore-forming bacterial species in patients treated with SER-109, as compared to those receiving placebo. These data demonstrate that SER-109 successfully engrafted and was biologically active in the Phase 2 study. In addition, among those patients with an increased prevalence of specific SER-109 associated bacterial species, a decreasedrate of high confidence recurrences (i.e., recurrences confirmed by C. difficile cytotoxin assay) was demonstrated.

The company also assessed whether the SER-109 dose impacted the degree of microbiome changes observed. All Phase 2 patients received 1 X 10 8 bacterial spores, whereas patients in the prior SER-109 Phase 1b open label study received doses ranging approximately 700-fold, from 3 X 107 to 2 X 109 spores. The company also performed high-resolution whole metagenomics sequencing of stool samples collected from patients in both the SER-109 Phase 1b, as well as the Phase 2 trial as part of this analysis. The analysis indicated that subjects in the open-label Phase 1b study who received a higher dose achieved a significantly greater increase in diversity of commensal spore-former bacteria by 1 week post-treatment, as compared to both Phase 1b and Phase 2 subjects treated with lower doses. These results suggest that the dose used in the SER-109 Phase 2 study may have been suboptimal in certain patients, and may have resulted in a less robust drug effect, contributing to decreased efficacy in Phase 2, as compared to the Phase 1b study.

Much of the SER-109 Phase 2 microbiome-related learnings are based on advancements in the computational analytics and higher resolution whole metagenomics sequencing techniques that Seres is pioneering, and several of these methods were developed after the SER-109 Phase 2 study was designed. Insights obtained from this work may also
benefit Seres’ broad preclinical and clinical microbiome development pipeline.

Analysis of SER-109 Phase 2 Study Clinical Drug Product

The company also conducted a thorough and detailed investigation of the potential impacts of manufacturing and formulation changes implemented in the Phase 2 study. No issues regarding product quality or formulation were identified which would have impacted the Phase 2 study results.

Summary of SER-109 24-Week and Open Label Extension Study Results

The full, 24-week Phase 2 study results continue to demonstrate that SER-109 was generally well tolerated. The most common adverse events associated with SER-109 included diarrhea, abdominal pain and flatulence. The Phase 2 study population represented older individuals, many in poor health, and a high rate of serious adverse events (SAEs) was reported in both study arms. A numerically higher rate of SAEs was observed in the SER-109 arm (15.0% versus 10.3% for placebo), however there was no detectable pattern in the SAEs observed, and none of these were considered to be SER-109 drug-related by the study investigators.

As expected with recurrent C. difficile infection, relatively few additional recurrences occurred beyond 8 weeks, and the 24-week data provides relatively little new information regarding efficacy. Based on 24-week data, five further patients recurred in the SER-109 arm, but three of the five recurrences (60%) were in patients who terminated the trial early, resulting in an imputed recurrence. In the placebo arm, one patient also terminated the trial early, resulting in an imputed recurrence. Early terminations, and loss of patients to follow-up, are common in the long safety follow-up portions of clinical trials.

Phase 2 study subjects who experienced a C. difficile recurrence had the option to enroll in an open label extension study, where they were treated with SER-109 and were followed for an additional 24 weeks. In total, 34 patients entered the open label extension study and 11 patients recurred during the initial 8-week study period, a 32% recurrence rate.

Source:

About Seres Therapeutics:  Seres Therapeutics, Inc. is a leading microbiome therapeutics platform company developing a novel class of biological drugs that are designed to treat disease by restoring the function of a dysbiotic microbiome, where the natural state of bacterial diversity and function is imbalanced. The Phase 2 study of Seres’ program SER-109 has been completed in multiply recurrent C. difficile infection. Seres’ second clinical candidate, SER-287, is being evaluated in a Phase 1b study in patients with mild-to-moderate ulcerative colitis (UC). Seres is also developing SER-262, the first ever synthetic microbiome therapeutic candidate, in a Phase 1b study in patients with primary C. difficile infection. For more information, please visit http://www.serestherapeutics.com. Follow us on Twitter @SeresTx.

Forward-looking Statements:  This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact should be considered forward-looking statements, including without limitation statements regarding our SER-109 development plans, the timing, design, and potential results of a new clinical study for SER-109, the potential for a redesigned trial to provide different results, and the impact any analysis may have on clinical outcomes.

These forward-looking statements are based on management’s current expectations. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, the following: we have incurred significant losses, are not currently profitable and may never become profitable; our need for additional funding, which may not be available; our limited operating history; the unpredictable nature of our early stage development efforts for marketable drugs; the unproven approach to therapeutic intervention of our microbiome therapeutics; the lengthy and expensive process of clinical drug development, which has an uncertain outcome; potential delays in enrollment of patients which could affect the receipt of necessary regulatory approvals; potential delays in regulatory approval, which would impact the ability to commercialize our product candidates and affect our ability to generate revenue; any fast track or Breakthrough Therapy designation may not lead to faster development, regulatory approval or marketing approval; our possible inability to receive orphan drug designation should we choose to seek it; our reliance on third parties to conduct our clinical trials and the potential for those third parties to not perform satisfactorily; our reliance on third parties to manufacture our product candidates, which may delay, prevent or impair our development and commercialization efforts; our lack of experience in manufacturing our product candidates; the potential failure of our product candidates to be accepted on the market by the medical community; our lack of experience selling, marketing and distributing products and our lack of internal capability to do so; failure to compete successfully against other drug companies; potential competition from biosimilars; failure to obtain marketing approval internationally; post-marketing restrictions or withdrawal from the market; anti-kickback, fraud, abuse, and other healthcare laws and regulations exposing us to potential criminal sanctions; recently enacted or future legislation; compliance with environmental, health, and safety laws and regulations; protection of our proprietary technology; protection of the confidentiality of our trade secrets; changes in United States patent law; potential lawsuits for infringement of third-party intellectual property; our patents being found invalid or unenforceable; compliance with patent regulations; claims challenging the inventorship or ownership of our patents and other intellectual property; claims asserting that we or our employees misappropriated a third-party’s intellectual property or otherwise claiming ownership of what we regard as our intellectual property; adequate protection of our trademarks; ability to attract and retain key executives; managing our growth could result in difficulties; risks associated with international operations; potential system failures; the price of our common stock may fluctuate substantially; our executive officers, directors, and principal stockholders have the ability to control all matters submitted to the stockholders; a significant portion of our total outstanding shares are eligible to be sold into the market; unfavorable or lacking analyst research or reports; and we are currently subject to securities class action litigation. These and other important factors discussed under the caption “Risk Factors” in our Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission, or SEC, on November 10, 2016 and our other reports filed with the SEC, could cause actual results to differ materially from those indicated by the forward-looking statements made in this press release. Any such forward-looking statements represent management’s estimates as of the date of this press release. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release.

Reference:

  1. Polage, C. R., et al. (2015). Overdiagnosis of Clostridium difficile Infection in the Molecular Test Era. JAMA Internal Medicine, 175(11), 1792–1801.

IR or PR Contact:

Carlo Tanzi, Ph.D., Seres Therapeutics, 617-203-3467

Head of Investor Relations and Corporate Communications

Ctanzi@serestherapeutics.com

July 5th Join C. diff. Spores and More With Dr. Garey and Dr. Vickers As We Discuss Summit Therapeutics: Ridinilazole, a Microbiome Preserving Antibiotic For the Treatment Of C. difficile Infection (CDI)

 

Listen to the live broadcast

on  July 5th,  2016

cdiffRadioLogoMarch2015CLICK ON THE LOGO TO BE REDIRECTED TO THE  LIVE BROADCAST PAGE

Listen in to the live broadcast at 10a PT,   11a MT,   12p CT,   1p ET     6p UK


C. diff. Spores and More,”™ Global Broadcasting Network – innovative and educational interactive healthcare talk radio program discusses

This Episode:  

Summit Therapeutics: ridinilazole, a microbiome preserving antibiotic for the treatment of a C. difficile infection (CDI)

With Our Guests:

Dr. Kevin W. Garey; Chair, Department of Pharmacy Practice and Translational Research Professor of Pharmacy Practice at the University of Houston College of Pharmacy, Houston, TX

Dr. Richard Vickers, Chief Scientific Officer at Summit Therapeutics

Join us as we discuss a promising and new treatment for a C. difficile infection.  Summit Therapeutic’s Ridinilazole, a microbiome preserving antibiotic will be introduced with updates with our  guests Dr. Kevin W. Garey, Chair, Department of Pharmacy Practice and Translational Research, Professor of Pharmacy Practice at the University of Houston College of Pharmacy, Houston, Texas and  Dr. Richard Vickers, Chief Scientific Officer at Summit Therapeutics

♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦

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 HeZarPhotoWebsiteTop (2)ad 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.

To access the C. diff. Spores and More program page and library, please click on the following link:    www.voiceamerica.com/show/2441/c-diff-spores-and-more

Take our show on the go…………..download a mobile app today

http://www.voiceamerica.com/company/mobileapps

Programming for C. diff. Spores and More ™  is made possible through our official  Sponsor;  Clorox Healthcare

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Synthetic Biologics Announced Positive Topline Results From the Second Phase 2a Open-Label Clinical Trial of SYN-004, Prevention of C.diff. Infection (CDI) and Antibiotic-associated Diarrhea (AAD)

SYN-004 Degraded IV Ceftriaxone in the Presence of a Proton Pump Inhibitor in the Gastrointestinal Tract without Affecting Antibiotic Levels in the Bloodstream —

— Two Poster Presentations Planned for ASM Microbe 2016, Including Detailed Data from Two SYN-004 Phase 2a Open-Label Clinical Trials —

SyntheticBiologics2016LOGO

Synthetic Biologics, Inc. a clinical stage company focused on developing therapeutics to protect the gut microbiome, announced positive topline results from the second Phase 2a open-label clinical trial of SYN-004, the Company’s candidate designed to protect the gut microbiome from the unintended effects of certain commonly used intravenous (IV) beta-lactam antibiotics for the prevention of C. difficile infection (CDI), antibiotic-associated diarrhea (AAD) and the emergence of antibiotic-resistant organisms. Results from 14 participants who completed this clinical trial were analyzed to assess the ability of the 150 mg dose of SYN-004 to degrade ceftriaxone when administered alone and with the proton pump inhibitor (PPI), esomeprazole.

 

To read article in its entirety:

http://ir.syntheticbiologics.com/press-releases/detail/211

 

 

 

Summit Therapeutics PLC Is Granted A “Composition Of Matter” Patent By U.S. Patent and Trademark Office

In The News:

C. difficile Infection–  Treatment On The Horizon

Summit Therapeutics PLC

summit

The US patent and trademark office have granted a “composition of matter” patent.

It gives a period of exclusivity for ridinilazole in the United States until at least December 1, 2029, with the possibility of being extended.

It’s been a busy period for the firm and Glyn Edwards, Chief Executive said: “This new patent grant in one of our potential major commercial markets substantially strengthens our intellectual property estate protecting our novel CDI antibiotic ridinilazole and supports our efforts to maximize the potential of this promising compound.”

“We are focused on our CDI and DMD programmes and today’s news, combined with the recently announced expansion advancing  of our PhaseOut DMD trial, highlights their continuing excellent progress as we seek to have a meaningful impact on the lives of patients living with these serious diseases.”

In a Phase 2 clinical trial, ridinilazole showed statistical superiority over vancomycin – the standard of care medicine –  in rates of sustained clinical response, an endpoint that captures both initial cure and recurrence of the disease.

 

To read article in its entirety:

http://www.proactiveinvestors.co.uk/companies/news/125364/summit-therapeutics-plc-boosted-by-us-patent-for-c-diff-antibiotic-125364.html

 

*Please note – The C Diff Foundation does not endorse this product or any product and this posting is strictly for informational purposes only.