Brandt LJ American Journal of Gastroenterology Lecture: Intestinal microbiota and the role of fecal microbiota transplant (FMT) in treatment of C. difficile infection. Am J Gastroenterol. 2013 Feb;108(2):177-85. doi: 10.1038/ajg.2012.450. Epub 2013 Jan 15. Review.
El-Salhy M, Hatlebakk JG, Gilja OH, Bråthen Kristoffersen A, Hausken T Efficacy of faecal microbiota transplantation for patients with irritable bowel syndrome in a randomised, double-blind, placebo-controlled study. Gut. 2020 May;69(5):859-867. doi: 10.1136/gutjnl-2019-319630. Epub 2019 Dec 18.
Johnsen PH, Hilpüsch F, Cavanagh JP, Leikanger IS, Kolstad C, Valle PC, Goll R Faecal microbiota transplantation versus placebo for moderate-to-severe irritable bowel syndrome: a double-blind, randomised, placebo-controlled, parallel-group, single-centre trial. Lancet Gastroenterol Hepatol. 2018 Jan;3(1):17-24. doi: 10.1016/S2468-1253(17)30338-2. Epub 2017 Nov 1.
Lee P, Yacyshyn BR, Yacyshyn MB Gut microbiota and obesity: An opportunity to alter obesity through faecal microbiota transplant (FMT). Diabetes Obes Metab. 2019 Mar;21(3):479-490. doi: 10.1111/dom.13561. Epub 2018 Nov 20. Review.
Leshem A, Horesh N, Elinav E Fecal Microbial Transplantation and Its Potential Application in Cardiometabolic Syndrome. Front Immunol. 2019 Jun 14;10:1341. doi: 10.3389/fimmu.2019.01341. eCollection 2019. Review.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: 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 2: 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 3: 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 4: 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.
