Seres Therapeutics, Inc. announced the appointment of Claire M. Fraser, Ph.D., to its Board of Directors. Dr. Fraser will begin serving on Seres' Board, effective immediately. Dr. Fraser is the Director of The Institute for Genome Sciences, which she launched in 2007, at the University of Maryland School of Medicine.

She also serves as a faculty member in the Departments of Medicine and Microbiology/Immunology. Prior to this, she held positions as President and Director of The Institute for Genomic Research; Chief of the Section on Molecular Neurobiology in the Laboratory of Physiologic and Pharmacologic Studies at the National Institute on Alcohol Abuse and Alcoholism; Senior Staff Fellow and Chief of the Unit of Receptor Regulation, Receptor Biochemistry and Molecular Biology at the Laboratory of Molecular and Cellular Neurobiology within the National Institutes of Health; and a Cancer Research Scientist at Roswell Park Memorial Institute. In addition to the focus on SER-109, Seres continues to make progress on its SER-155 clinical study.

Seres recently completed enrollment of Cohort 1 in its SER-155 clinical study and, after a successful pre-planned meeting in December 2022 with the study's Data and Safety Monitoring Board (DSMB) to review SER-155 Cohort 1 safety data, plans to begin enrollment of Cohort 2 in early 2023. In addition, the Company plans to announce initial safety and pharmacological data, including drug bacterial species engraftment from Cohort 1, in early 2023.