Converting poop to pills was something unimaginable a few years ago, but now Fecal Microbiota Transplant (FMT) is taking the medical world by storm. This revolutionary technique, which promises to treat a wide range of diseases, from GI disorders to mental health issues, is becoming popular due to its success in treating recurrent clostridioides difficile infection (CDI), a serious infection that can damage the colon. FMT offers tremendous opportunities but also has challenges that players should consider if they want to thrive in this industry.
FMT is a procedure in which feces from a screened, healthy donor are transplanted into a recipient to balance the gut microbiota. This procedure can help treat certain infections and lessen the severity of some gut health issues.
Gut infections are usually treated using antibiotics, which can occasionally destroy beneficial bacteria. A 2000 study published in the Journal of Microbiology, a delayed open-access journal of the American Society for Microbiology, indicated that CDI recurring in around 15% to 35% of people is caused by antibiotics disrupting the gut microbiota and its balance (gut dysbiosis). Dysbiosis has been linked to several chronic illnesses, such as cardiovascular disease, inflammatory bowel disease (IBD), diabetes, and colorectal cancer (CRC).
FMT is highly efficient in treating recurrent CDI, with a cure rate of 90%, according to a 2015 study published in the American Journal of Gastroenterology. Numerous trials to understand the efficacy of FMT in treating conditions such as obesity, liver disease, ulcerative colitis, Crohn’s disease, Parkinson’s disease (PD), and IBS are underway. There are also some pre-clinical studies in progress to understand the potential of FMT in treating illnesses such as diabetes, skin issues, lung diseases, and autism.
This article is the second in EOS Perspectives' coverage of Fecal Microbiota Transplantation in animals and humans. Read our related Perspective: Poop to Pills: Is FMT the Future of Veterinary Medicine?
FMT is showing promising growth
The human FMT sector is expected to grow at a CAGR of 5.1% and reach US$3.15 billion by 2031, according to a 2023 report published by India-based market research company The Brainy Insights.
The key factor influencing this growth is the rising incidence of GI disorders. According to the GI Alliance, a US-based network of gastroenterology providers, around 20 million Americans have chronic digestive disorders. Similarly, the CDC estimates that there are around 500,000 cases of CDI reported annually in the USA, and about 9% of elderly patients die within a month of contracting healthcare-associated CDI. All these have influenced the growth of FMT, which offers a promising solution to several conditions.
Other factors influencing the FMT sector growth are the rising patient awareness and interest in preventive healthcare and the emergence of effective probiotic strains.
There are several biotechnology companies currently involved in R&D and product development. Australia-based BiomeBank became the first company to get approval from a competent authority to market its FMT-based CDI solution called Biomictra Faecal Microbiota (colonoscopic, enema, and upper GI delivery) in November 2022. This was followed by the FDA approval of US-based Rebiotix-Ferring Pharmaceuticals’ REBYOTA (rectally administered) in the same month. Seres Therapeutics, a US-based company, has also received FDA approval for its orally delivered product Vowst (SER-109) for treating CDI in April 2023. Following Seres’ footsteps, Rebiotix-Ferring is now conducting trials to develop an oral alternative, RVX7455.
US-based Finch Therapeutics is another major company developing solutions presently undergoing phase-3 studies for diseases such as chronic hepatitis B and autism. Its solution, CP101, for treating CDI, has been discontinued.
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The FMT sector is grappling with a multitude of pressing challenges
The FMT sector has the potential to treat numerous GI and other related disorders effectively. However, the business landscape is still marred by several challenges that players must consider.
Lack of consensus about policies is making development challenging
Regulatory hurdles are one major roadblock players face. The FDA currently regulates FMT as an unapproved biologic medicine. There is a lack of uniform guidelines for FMT, causing variations in processes, such as donor screening and processing.
The FDA took its first step toward FMT regulation in 2013. It released a set of guidelines removing the need for investigational new drug (IND) applications when FMT is used for treating CDI unresponsive to standard treatments if medical practitioners secure informed consent. However, this application is needed when FMT is used for other reasons, including safety studies.
The FDA drafted new guidance in 2016, which was finalized in November 2022. In this guidance, the FMTs acquired from stool banks are exempt from regulatory discretion. Also, the IND requirements will be waived if some conditions are fulfilled, such as getting informed consent from patients or authorized representatives and screening and testing stool under the supervision of competent healthcare professionals. There should also be no known potentially serious safety concerns, such as issues with improper handling or storage, or issues with administering product collection without the proper testing or screening. All these increase the procedural burden for healthcare practitioners. However, the FDA has indicated no regulatory policies for stool banks to reduce the administrative burden of private practice settings without the support of research staff.
Due to the significant variation in gut microbial composition among samples, FMT fails to satisfy EU drug classification requirements. Also, since human cells are not an active component of fecal matter, FMT is not covered by EU Directive 2004/23, which deals with the safety and quality of human tissues and cells. Therefore, the European Medicines Agency (EMA) has authorized the member states to regulate FMT however they see fit.
This lack of consensus has led to diverging regulatory policies, causing uncertainties for interested players and making developmental activities challenging, particularly in Europe. But despite this, many companies, such as Rebiotix-Ferring Pharmaceuticals, are making leaps in R&D.
Donor selection has social, ethical, and financial challenges
Another bottleneck that needs to be addressed is the availability and selection of suitable donors. There is a debate regarding whether the patient should know the donor or not. Also, the ideal donor should be free from chronic illnesses or infections and willing to donate. The donor is screened for obesity, antibiotic resistance, microbiome diversity, oncogenic potential, a history of antibiotic use, and risky behaviors such as drug abuse.
Stool banks require donors to follow several restrictions, such as maintaining BMI, abstaining from unhealthy eating habits such as spicy foods or saturated fatty acids, and avoiding travel to infection-prone tropical regions for an extended period. With that, donor dropout is high due to the considerable commitment needed, according to a 2019 study published in Gastroenterology, the official journal of the American Gastroenterological Association (AGA).
FMT implementation is also facing several social and ethical challenges with questions such as donor compensation, gender of the donor, donor and patient vulnerability, and commercial use of fecal matter.
Companies can launch educational drives targeted at patients and ideal donors to raise their awareness about FMT, tackle social resistance towards the procedure, and build trust with prospective donor candidates and patients. This can help reduce people’s reluctance to participate in FMT procedures.
The procedure remains risky, especially for vulnerable population
FMT is associated with an increased risk of transmitting infections such as Shiga toxin-producing E. coli (STEC) and enteropathogenic E. coli (EPEC) from the donor to the receiver. Immunocompromised patients are at a higher risk of developing side effects, according to a 2020 study published in Digestive Diseases and Sciences, a peer-reviewed journal. Similarly, a 2019 case study published in the New England Journal of Medicine, a journal of the Massachusetts Medical Society, showed a fatal infection contracted by an elderly immunocompromised individual following an FMT procedure.
Another challenge is the very few pediatric clinical trials, which makes it difficult for physicians to make the best judgments for when to initiate FMT therapy in children.
To tackle safety-related challenges, the FDA released safety advice in 2019 and 2020 regarding the possible risk of severe, potentially fatal infections associated with the procedure. Companies such as Boston-based OpenBiome have promptly modified their sample screening methodology to identify such infections.
Lack of studies on long-term effects
The lack of understanding of the long-term changes FMT can cause in a patient’s microbiota is another challenge. Several studies reveal that liver diseases, cancer, cardiovascular diseases, etc., can develop due to microbiota dysbiosis. Investment in R&D by interested and capable players can help medical professionals understand the long-term implications and complications of FMT and identify feasible solutions, which can pave the way for widespread treatment acceptance.
The sector’s future appears bright, underpinned by extensive development
FMT is a highly effective treatment for recurrent CDI. New developments have been taking place in many areas, such as administration modes, stool collection, and storage, and interested players can find opportunities in these areas. The FDA is also becoming more accepting of FMT-based treatments that show good results. This is shown by the approval of Rebyota and Vowst, both of which were more effective in reducing recurrent CDI compared to placebo in randomized controlled trials.
Stool banking and processing is another area ripe with opportunities for interested players. Conventionally, fresh stool is used for FMT, but this can increase the cost of the procedure. Stool banks are being developed to facilitate cost-effective and safe treatment. An example is OpenBiome, the USA’s first and biggest public stool bank. Stool banks can also make the standardization of stool processing and donor selection easier, according to a 2019 report published by the European Helicobacter and Microbiota Study Group.
Players can also form collaborations with healthcare professionals and research institutions to offer FMT treatments and support microbiome research. Many government organizations are also showing interest in the development of FMT therapies. The GBP500,000 grant awarded by the Biotechnology and Biological Sciences Research Council (BBSRC), a part of UK Research and Innovation, in 2022 to Norwich-based Quadram Institute (QI) to build and equip a new FMT research facility is an indication of this.
Investing in the development of FMT treatments can revolutionize the treatment of several diseases, and companies that can invest in research can gain a head start in the competition. Rigorous R&D is going on to develop FMT solutions for conditions such as obesity, depression, cancer, pediatric diseases, and autoimmune disorders such as Crohn’s disease.
A 2023 trial conducted by the US-based Emory University School of Medicine also showed that FMT can reduce the colonization of multidrug-resistant organisms in kidney transplant patients. Investigators believe more research in this field can help improve transplant success rates and decrease the chances of infection. Individual case studies have shown great improvement in cure rates for certain diseases, including mental health conditions, but more research is needed to present a solid case for product development.
EOS Perspective
FMT is gradually establishing itself as a promising solution for recurrent CDI and is expected to create waves in the treatment of numerous physical and mental health conditions despite facing several challenges.
Improvements in donor selection, early identification of certain conditions with better risk assessment, and increased treatment efficiency can be expected with ongoing research expanding the knowledge base of the medical community.
Experts are also looking into FMT’s potential as an adjunct therapy in treating diseases such as tuberculosis, and it is expected to open the door to interested players to create personalized and targeted FMT-based treatments for various diseases.
Studies are also being done to understand and substantiate the potential of gut microbiota to anticipate diseases such as IBD and CRC using AI (Artificial Intelligence) and ML (Machine Learning). ML can be used to identify biomarkers in the gut microbiota to aid in the early detection of CRC. These studies, when extended to FMT, are expected to help medical professionals identify ideal donors and improve treatment efficiency.
The Brainy Insights, in its 2023 report, predicts a growth in the probiotic infusion segment owing to the increasing studies on diabetes management. Therefore, competitive players interested in FMT can also diversify their portfolios by including consortia (multi-population systems with a broad spectrum of microbial species) and probiotic products that have the potential to offer regulated, standardized treatments. This can help them get an edge over their competitors.
Several oral FMT solutions are currently in phase-1 and phase-2 clinical trials, and many are geared toward treating conditions other than recurrent CDI. For example, US-based Vedanta Biosciences is developing FMT therapeutics for IBD, food allergies, solid tumors, etc. As research continues, it is expected that investigators will be able to identify the bacterial strains that can treat different diseases and isolate and mass-produce them, leading to a decrease in stool collection and processing and a reduction in stool transplant-related infections, but this development is expected to occur very far in the future.
Although marred by several challenges, FMT is well-positioned in the microbiome industry to obtain FDA approval and (with time) widespread acceptance. Right now, interested players can expect good returns by investing in oral FMT development, stool banking, and R&D.
