From Infant Immunity to Cancer Therapy: The Power of the Microbiome with Dr. Stephanie Culler of Persephone Biosciences

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In this episode of Skin Anarchy, Dr. Ekta Yadav sits down with Dr. Stephanie Culler, co-founder and CEO of Persephone Biosciences, to explore one of the most rapidly evolving frontiers in modern health science: the human microbiome. From early immune development to cancer therapy, the conversation reveals how the trillions of microbes living in our bodies may shape health in ways scientists are only beginning to understand.

Dr. Culler’s path into microbiome research began with a personal mission to understand disease after losing both of her grandmothers to cancer. Following her PhD at the California Institute of Technology, where she studied gene therapy approaches to cancer, she moved into industrial biotechnology and microbial engineering. That work eventually led her to co-found Persephone Biosciences, a company focused on translating microbiome science into real-world therapeutics and consumer health solutions.

A major focus of the discussion centers on the infant microbiome and its role in shaping immune development. Dr. Culler explains how microbes transferred during birth and nourished through breast milk help “train” the immune system in the earliest stages of life. Yet modern research suggests that key beneficial bacteria—particularly Bifidobacterium infantis—have dramatically declined in Western infants. In large-scale studies conducted by Persephone, only a small percentage of U.S. infants carry adequate levels of this once-dominant microbe.

The conversation also explores how microbiome balance may influence responses to cutting-edge cancer treatments like immunotherapy. Emerging research suggests that gut bacteria can significantly affect how patients respond to checkpoint inhibitors, opening the door to microbiome-based interventions that could enhance treatment outcomes.

Listen to the full episode to hear Dr. Stephanie Culler explain how microbiome science is transforming our understanding of immunity, disease prevention, and the future of medicine.

Learn more about Persephone Biosciences

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