Browsing by Author "Yen, Eugene F."

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    Fecal Microbiota Transplantation Is Highly Effective in Real-World Practice: Initial Results From the FMT National Registry
    (Elsevier, 2021-01) Kelly, Colleen R.; Yen, Eugene F.; Grinspan, Ari M.; Kahn, Stacy A.; Atreja, Ashish; Lewis, James D.; Moore, Thomas A.; Rubin, David T.; Kim, Alison M.; Serra, Sonya; Nersesova, Yanina; Fredell, Lydia; Hunsicker, Dea; McDonald, Daniel; Knight, Rob; Allegretti, Jessica R.; Pekow, Joel; Absah, Imad; Hsu, Ronald; Vincent, Jennifer; Khanna, Sahil; Tangen, Lyn; Crawford, Carl V.; Mattar, Mark C.; Chen, Lea Ann; Fischer, Monika; Arsenescu, Razvan I.; Feuerstadt, Paul; Goldstein, Jonathan; Kerman, David; Ehrlich, Adam C.; Wu, Gary D.; Laine, Loren; Medicine, School of Medicine
    Background & Aims Fecal microbiota transplantation (FMT) is used commonly for treatment of Clostridioides difficile infections (CDIs), although prospective safety data are limited and real-world FMT practice and outcomes are not well described. The FMT National Registry was designed to assess FMT methods and both safety and effectiveness outcomes from North American FMT providers. Methods Patients undergoing FMT in clinical practices across North America were eligible. Participating investigators enter de-identified data into an online platform, including FMT protocol, baseline patient characteristics, CDI cure and recurrence, and short and long-term safety outcomes. Results Of the first 259 participants enrolled at 20 sites, 222 had completed short-term follow-up at 1 month and 123 had follow-up to 6 months; 171 (66%) were female. All FMTs were done for CDI and 249 (96%) used an unknown donor (eg, stool bank). One-month cure occurred in 200 patients (90%); of these, 197 (98%) received only 1 FMT. Among 112 patients with initial cure who were followed to 6 months, 4 (4%) had CDI recurrence. Severe symptoms reported within 1-month of FMT included diarrhea (n = 5 [2%]) and abdominal pain (n = 4 [2%]); 3 patients (1%) had hospitalizations possibly related to FMT. At 6 months, new diagnoses of irritable bowel syndrome were made in 2 patients (1%) and inflammatory bowel disease in 2 patients (1%). Conclusions This prospective real-world study demonstrated high effectiveness of FMT for CDI with a good safety profile. Assessment of new conditions at long-term follow-up is planned as this registry grows and will be important for determining the full safety profile of FMT.
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    Rectal Optical Markers for In-vivo Risk Stratification of Premalignant Colorectal Lesions.
    (AACR, 2015-10-01) Radosevich, Andrew J.; Mutyal, Nikhil N.; Eshein, Adam; Nguyen, The-Quyen; Gould, Bradley; Rogers, Jeremy D.; Goldberg, Michael J.; Bianchi, Laura K.; Yen, Eugene F.; Konda, Vani; Rex, Douglas K.; Van Dam, Jacques; Backman, Vadim; Roy, Hemant K.; Department of Medicine, IU School of Medicine
    Purpose: Colorectal cancer remains the second leading cause of cancer deaths in the U.S. despite being eminently preventable by colonoscopy via removal of premalignant adenomas. In order to more effectively reduce colorectal cancer mortality, improved screening paradigms are needed. Our group pioneered the use of low coherence enhanced backscattering (LEBS) spectroscopy to detect the presence of adenomas throughout the colon via optical interrogation of the rectal mucosa. In a previous ex-vivo biopsy study of 219 patients, LEBS demonstrated excellent diagnostic potential with 89.5% accuracy for advanced adenomas. The objective of the current cross-sectional study is to assess the viability of rectal LEBS in-vivo. Experimental Design: Measurements from 619 patients were taken using a minimally invasive 3.4 mm diameter LEBS probe introduced into the rectum via anoscope or direct insertion, requiring ~1 minute from probe insertion to withdrawal. The diagnostic LEBS marker was formed as a logistic regression of the optical reduced scattering coefficient μs∗ and mass density distribution factor D. Results: The rectal LEBS marker was significantly altered in patients harboring advanced adenomas and multiple non-advanced adenomas throughout the colon. Blinded and cross-validated test performance characteristics showed 88% sensitivity to advanced adenomas, 71% sensitivity to multiple non-advanced adenomas, and 72% specificity in the validation set. Conclusions: We demonstrate the viability of in-vivo LEBS measurement of histologically normal rectal mucosa to predict the presence of clinically relevant adenomas throughout the colon. The current work represents the next step in the development of rectal LEBS as a tool for colorectal cancer risk stratification.