HomeHealth articlesfecal microbiota transplantationWhat Is Fecal Microbiota Transplantation?

Fecal Microbiota Transplantation: Applications, Risks, and Alternatives

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FMT is a technology in which a healthy donor's stool is infused into the recipient's gut to restore microbiome balance.

Written by

Hemamalini. R

Medically reviewed by

Dr. Jagdish Singh

Published At March 1, 2024
Reviewed AtMarch 1, 2024

Introduction

FMT is an approach in which the stool of a healthy donor is introduced into the recipient's gut. This good microbiota balances out the bad bacteria that might be causing the illness. Recurrent C. diff. (Clostridium difficile) is the focus of the FMT treatment, which can be very dangerous, leading to increased excretion of water in the patient's body and colon inflammation. The method is normally a good controlling measure to C. diff and in ensuring it does not recur. Since C. diff. While it is the condition for which FMT is currently approved, it is also being explored in colitis, autism, and obesity. However, secure data still lacks scientific evidence of FMT in other non-C.diff problems. This article can discuss what fecal microbiota transplantation is, and it would be beneficial if it is covered in this article.

Which Diseases Can Be Cured by Using Fecal Microbiota Transplantation?

Fecal Microbiota Transplantation (FMT) is chiefly employed to address C. diff. with the highest efficacy. However, FMT is also under study for the treatment of other diseases, such as ulcerative colitis, Crohn's disease, and cirrhosis, including multiple sclerosis, depression, obesity, food allergies, and diabetes. FMT is capable of making the procedure of many diseases, like obesity, malignant tumors, and autoimmune diseases among others, better. FMT can restore the good microbiome community; meanwhile, it can balance the microbiota and rehabilitate important metabolites (e.g., short-chain fatty acids, antibacterial peptides, bacteriocins, and bile acids) for host metabolism. As it is, FMT is currently considered and proven effective for persistent C. diff infections only.

How To Perform Fecal Microbiota Transplantation Study?

Fecal microbiota transplant can be performed in several ways, delivering healthy donor stools to the recipient’s gastrointestinal tract. It includes:

  • Colonoscopy: The colonoscope is used to put it into the rectum, and the donor stool solution undergoes infusion into the colon as the colonoscope is removed.

  • Upper endoscopy: Tube that travels through the nose and ends in the duodenum, where the donor stool solution infusion occurs.

  • Enema: A tube is placed in the rectum and loaded with enema solution, which is then instilled in the lower part of the colon.

  • Capsule: This capsule is taken, and as it disintegrates in the digestive tract, the stool solution within it is released.

In preparation for this surgery, the patients are usually told to quit taking antibiotics and other drugs that can affect the transplantation procedure. The donor stool is screened for diseases and processed for disinfection to assure safety. The donor stool is then mixed with saline to create a solution which later is inserted into the recipient's gastrointestinal tracts.

What Are the Benefits of Fecal Microbiota Transplantation?

FMT exemplifies several advantages, mainly in treating the refractory C. Diff. FMT can:

  • Recover the favorable gut microbiome, which can inhibit the invasion of bad bacteria, and consequently, the infection will not come again after antibiotic treatment.

  • Influence the balance of gut microbiota favorably, reducing the host damage level and fostering the recovery of normal immune function.

  • Bring back important metabolites used by human cells to make SCFA (Short-Chain Fatty Acids), AMP (Antimicrobial Peptides), bacteriocins, and bile acids.

Yet, another area of research delves into the impact of FMT in helping resolve conditions like ulcerative colitis, Crohn’s disease, cirrhosis, multiple sclerosis, depression, obesity, food allergies, and diabetes. Nevertheless, the FMT is currently used only in case of persistent infections with C. diff. They have another optimal effect only in this treatment.

What Are the Risks of Fecal Microbiota Transplantation?

FMT could cause infectious illnesses and also cause the following risks.

  • Infections: FMT has been used to cure antibiotic-resistant bacteria, such as Extended-Spectrum Beta-Lactamase (ESBL)-producing E. coli and Shiga Toxin-producing E coli (STEC).

  • Death: ESBL-producing E.coli and STEC bacteria are the main causes of death in fatal cases; the fatality rate is two.

  • Allergic Reactions: Although it is donor stool inoculation, some patients can still have allergic reactions from the stool donor.

  • Gastrointestinal Symptoms: The gastrointestinal tract may be affected by mild-to-moderate side effects, such as bloating, gas, nausea, vomiting, and abdominal discomfort. With this treatment, the symptoms will disappear quickly in about a day or two days.

To prevent the transfer of harmful microbes, it is crucial to have strict screening and processing rules for Fecal Microbiota Transplantation (FMT). However, since no central authority oversees FMT methods, infection transmission is still risky.

Also, there is a theoretical risk of an increased chance of having among the recipient other non-infectious diseases like obesity, insulin resistance, other metabolic disorders, cancer, mood disorders, and other neuropsychiatric diseases. Consequently, long-term safety data have not demonstrated any therapeutic concern.

What Is the Success Rate of Fecal Microbiota Transplantation?

In FMT, or Fecal Microbiota Transplantation, the success rate is exceptionally high against Clostridium Difficile Infection (CDI), and the cure rates have been demonstrated to range between 85% to 95%. FMT has been demonstrated to potentially cure other diseases, including IBDs, Irritable Bowel Syndrome, neuropsychiatric illness, obesity, insulin resistance, and autoimmune diseases. Additionally, differences in success rates may occur because of how FMT is administered, the specific diseases being treated, and whether patients can move around easily. FMT is majorly approved and well-accepted by most people as it is commonly encountered with mild side effects, mostly due to the delivery route. Although it is unusual, there is always a chance of adverse effects, for instance, infections, bleeding, irritation, and the creation of holes in the colon.

What Are the Alternatives to Fecal Microbiota Transplantation?

Some alternatives to the therapy of Clostridium diff, which is different from fecal microbiota transplantation, exist, like antibiotics, probiotics, and immunoglobulin therapy. Antibiotics serve as the first step in the treatment plan for CDI. During treatment, the gut microbiome may be altered, and the risk of recurrence may increase. To start with, both Lactobacillus and Saccharomyces boulardii probiotics are known to assist in restoring the gut microbiome and recovering from CDI relapse. Relying on immunoglobulin therapy involves adding antibodies that respond to C. diff toxins in the body, which may be administered alongside antibiotics or as the only option. Yet, these alternatives have limitations like lesser effectivity rates, higher costs, and adverse reactions. Moreover, it has been proven by several studies that FMT can help cure various conditions other than IBD, such as irritable bowel syndrome and neuropsychiatry, including obesity, insulin resistance, and autoimmune diseases. On the one hand, FMT could be very promising, but further research is required to determine its safety and success in treating these conditions.

Conclusion

Fecal Microbiota Transplantation (FMT) should be used more often, especially in recurrent cases of C. difficile infections. Aside from the above-mentioned circumstances where this supplement tends to be effective, there is a lack of scientific evidence regarding its applicability in different settings. FMT's benefits relate to the restoration of healthy gut microbiota; however, its associated risks, including the risk of bacterial transference and infection, must be carefully evaluated, and protocols must be in place. The different treatment techniques with high success rates have been seen in acute diarrhea cases. However, antibiotics do not have such constraints. The precise and ongoing data collection is of utmost importance for confirming FMT safety and effectiveness and for the widening scope of its application.

Dr. Jagdish Singh
Dr. Jagdish Singh

Medical Gastroenterology

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