Digestive Disease Week is the largest international gathering of physicians and scientists in the fields of gastroenterology, hepatology, endoscopy and gastrointestinal surgery.

Cedars-Sinai is a nationally recognized leader in gastroenterology and gastrointestinal surgery. Digestive and liver disease experts attending the conference are available to discuss a wide variety of research, including these presentations.

Late-Breaking Trial Shows Progress in Difficult Ulcerative Colitis

Maria T. Abreu, MD, executive director of the F. Widjaja Inflammatory Bowel Disease Institute, will present late-breaking results from a clinical trial evaluating two targeted biologic therapies for ulcerative colitis used together. The study focused on patients whose disease had not responded to multiple advanced treatments and found that the combination led to higher rates of clinical remission and healing of the intestinal lining compared with either drug alone.

“We studied patients whose disease has already proven difficult to treat and found that using two therapies together led to stronger outcomes than either alone, without increasing side effects,” Abreu said.

Irritable Bowel Syndrome (IBS)

Ali Rezaie, MD, medical director of the GI Motility Program, will present research that found palatable elemental diet nutrition replacement reduced abdominal pain and related symptoms in people with irritable bowel syndrome after two weeks.

Zoe Krut, MHDS, a clinical research coordinator with the Center for Outcomes Research and Education at Cedars-Sinai Health Sciences University, will present research from a multicenter randomized trial showing that virtual reality-delivered cognitive behavioral therapy improved symptoms of IBS and was well accepted by patients. Study leader Christopher Almario, MD, MSHPM, assistant professor of Medicine and Health Systems Research, will also be on hand to discuss the research.

Interventional Gastroenterology

Barham K. Abu Dayyeh, MD, MPH, director of Interventional Gastroenterology, will share results of a study in which a less invasive laparoscopic procedure for hiatal hernia-associated GERD (gastroesophageal reflux disease) was used. It achieved results similar to standard surgery, with fewer complications. The abstract has been selected for the “Best of DDW” session held at the end of the meeting, highlighting 6 of the top studies presented.

Abu Dayyeh will also share results of another study in which a novel endoscopic therapy used pulsed electric fields to treat the lining of the small intestine. Results reveal improvements in blood sugar control and weight management for nearly one year in adults with Type 2 diabetes.

Inflammatory Bowel Disease

Talin Haritunians, PhD, a research associate professor of Medicine, will present results of a study that found patients with inflammatory bowel disease (IBD) have distinct genetic variants linked to an increased risk for cardiovascular disease, independent of traditional risk factors.

Allistair Clark, MA, a clinical research data specialist at Cedars-Sinai Health Sciences University, will share results of an investigation that found an AI-powered virtual reality therapy reduced pain and anxiety in patients with inflammatory bowel disease (IBD) in both inpatient and outpatient settings.

Small Intestinal Bacterial Overgrowth (SIBO)

Ruchi Mathur, MD, an endocrinologist, and Gabriela Leite, PhD, a research scientist, will present research linking changes in the small bowel microbiome to Type 2 diabetes. These include strong associations with small intestinal bacterial overgrowth (SIBO) and higher glucose levels. Mathur and Leite are with the Medically Associated Science and Technology (MAST) Program.

Diagnostics: Breath Testing

Mark Pimentel, MD, gastroenterologist, and project scientist Maria Jesus Villanueva-Millan, PhD, of the MAST program, are available to discuss their research t directly comparing breath and small-intestine gases in the same patients, showing that hydrogen sulfide levels reflect those in the small intestine and are linked to specific microbes and diarrhea severity.

Liver Disease

Hyunseok Kim, MD, MPH, PhD, hepatologist and assistant professor, Medicine, will present results of research examining biomarkers that may help predict cirrhosis and liver disease progression in people with alcohol-associated liver disease.

Ju Dong Yang, MD, medical director of the Liver Cancer Program, and clinical research data specialist Osama Khattab, MD, are available to discuss their research showing that transarterial radioembolization (TARE) achieved survival outcomes comparable to ablation in early-stage liver cancer, suggesting it may offer an alternative treatment option for patients.

Media Contact

To schedule an interview with a Cedars-Sinai expert during the conference, please contact Laura Coverson Laura.Coverson@cshs.org or 310-562-1112.

The research tested the elemental diet’s effectiveness and explored whether improving its unappealing taste—a major barrier—could help patients adhere to the diet’s stringent protocol. The investigators’ findings were published in the peer-reviewed journal Clinical Gastroenterology and Hepatology.

The elemental diet is a special low-fat liquid formulation that is designed to be easily digested and contains all the essential nutrients necessary for a healthy diet. A few prior studies have shown that the diet has the potential to improve challenging symptoms associated with digestive issues like small intestinal bacterial overgrowth (SIBO), intestinal methanogen overgrowth (IMO), Crohn’s disease, eosinophilic esophagitis and other gut ailments. The diet likely works by reducing inflammation, balancing the gut microbiome, healing the gut lining, and providing complete nutrition without additives and allergens that typically irritate the gut. Historically, elemental diet has had a low adherence rate because of the strict protocol and unpleasant taste.

SIBO and IMO typically occur when harmful bacteria or methane-producing microbes grow out of control in the gut. While antibiotics are often used to treat these conditions, they don’t always work.

“Elemental diets are designed to give the digestive system a break by providing easily absorbed nutrients,” said Ali Rezaie, MD, the study’s corresponding author and medical director of the GI Motility Program and director of Bioinformatics at the Medically Associated Science and Technology (MAST) Program at Cedars-Sinai. “This reduces stress on the gut, helping it heal and function better.”

In this study, 30 adults ages 18 to 85 diagnosed with SIBO or IMO strictly adhered to only a more palatable version of the elemental diet for two weeks. This was followed by two weeks during which study participants resumed their normal diet. The researchers analyzed changes in the gut microbiome, how well the diet was tolerated, symptom relief and breath test results, along with tracking any side effects.

The results were encouraging. Most participants reported tolerating the diet well, with no serious side effects. A key finding was a reduction in unfavorable microbes linked to gut issues. Methane levels also dropped significantly, with many returning to normal.

In addition, 83% of participants reported feeling better, with significant relief from common symptoms like bloating and discomfort. These findings suggested that a tastier version of the elemental diet helped restore balance in the gut and eased symptoms of SIBO and IMO.

“The study's positive results suggest that enhancing the palatability of the elemental diet could make it more accessible and practical for patients, improving adherence and quality of life for those who face significant challenges with traditional therapies,” said Mark Pimentel, MD, study author and executive director of the MAST Program at Cedars-Sinai.

Rezaie and his team of investigators plan to conduct larger studies to better understand the long-term effects of elemental diets and further address the socioeconomic barriers.

Other Cedars-Sinai authors include: Bianca W. Chang, Juliana de Freitas Germano, Gabriela Leite, Ruchi Mathur, Krystyna Houser, Ava Hosseini, Daniel Brimberry, Mohamad Rashid, Sepideh Mehravar, MJ Villanueva-Millan, Maritza Sanchez, Stacy Weitsman, Cristina M. Fajardo, Ignacio G. Rivera, LiJin Joo, Yin Chan and Gillian M. Barlow.

Funding: This study was in part supported by a research grant from Good LFE and John and Geraldine Cusenza Foundation. These sponsors played no role in the study design or in the collection, analysis, and interpretation of data.

Conflict of interest: Mark Pimentel, MD, is a consultant for Ferring Pharmaceuticals, Inc and Salvo Health, Cylinder Health, Inc has received grant support from Bausch Health, and has equity in Gemelli Biotech, Salvo Health, Cylinder Health, and Good LFE. Ali Rezaie, MD, is a consultant/speaker for Bausch Health and has equity in Gemelli Biotech and Good LFE. Cedars-Sinai has licensing agreements with Hobbs Medical and Gemelli Biotech.

Read more on the Cedars-Sinai Blog: Healthy Bowel Movements: Why You Should Pay Attention to Your Poop