In a study involving the gut microbiome, Albert Einstein College of Medicine researchers have discovered that hydrogen sulfide—commonly found in the gut and best known for its distinctive rotten-eggs odor when present in the air—plays a major and previously unknown role in metabolizing drugs and food dyes. The findings, published online, October 20, 2022, in Nature Metabolism, could lead to new therapeutic approaches against colorectal cancer and other intestinal diseases.
“This research supports a model in which the human gut continually produces hydrogen sulfide that can go on to interact with other chemicals in the gut—with potentially serious consequences for human health,” said Libusha Kelly, PhD, Associate Professor, Systems & Computational Biology and Microbiology & Immunology, Albert Einstein College of Medicine, and corresponding author on the study.
Dr. Kelly and her colleagues, including Leonard H. Augenlicht, PhD, focused on an important group of ingested compounds called “azo compounds,” so named because their molecular structures contain an azo (R-N=N-R’) group. Examples include the ulcerative colitis drugs balsalazide and sulfasalazine and the common food dyes Red 40 and Yellow 6.