DNA Today: A Genetics Podcast

What condition helped spark the creation of newborn screening in the United States? It was Phenylketonuria, or PKU, a rare inherited metabolic disorder that forever changed how we identify and treat genetic conditions from the very start of life. In this in-person episode of DNA Today, we kick off a three-part series on phenylketonuria, better known as PKU, by looking at how one condition became central to a major public health shift. Host Kira Dineen is joined in person by Sarah Chamberlin and Ryan Miller to explore the scientific, clinical, historical, and deeply personal sides of PKU. We explore the history of newborn screening itself, including the work of Dr. Robert Guthrie and the development of the Guthrie card. Sarah brings a remarkable piece of history to the recording: the original stamp used to create early Guthrie cards. Ryan, Sarah, and Kira unpack why PKU remains both a newborn screening success story and an ongoing challenge. From treatment access and medical nutrition coverage to state-by-state differences in newborn screening panels and the promise and complexity of newborn sequencing, this episode shows why PKU is still shaping conversations about genetics, public health, and rare disease care. Thank you to PTC Therapeutics for sponsoring this three-part series on PKU. Our guests are participating in this podcast to share their experience and opinions only. They are not providing any medical advice. Always check with your healthcare provider for treatment and screening advice. Episode Discussion Topics Why PKU helped launch newborn screening in the United States What life was like for individuals with PKU before newborn screening How PKU affects the body on a metabolic level The role of phenylalanine hydroxylase deficiency Why elevated phenylalanine levels can impact brain development Dr. Robert Guthrie’s role in developing newborn screening The history and significance of the Guthrie card Sarah’s experience learning her daughter’s newborn screen was flagged for PKU What confirmatory testing and early treatment looked like for Izzy How newborn screening panels vary across states What the Recommended Uniform Screening Panel, or RUSP, is Gaps in access to medical formula and low-protein medical foods Why insurance coverage remains a major challenge for families The promise and concerns around newborn sequencing How clinicians can better support newly diagnosed families Why connecting families with community early can be life-changing The need for more metabolic geneticists, genetic counselors, and dietitians Guest Bios Sarah Chamberlin is a parent of a child with PKU and a founder and the Chief Program Officer of flok, a patient advocacy organization supporting individuals and families affected by inherited metabolic disorders. Ryan Miller is Senior Director, Field Medical Lead at PTC Therapeutics on the U.S. Medical Affairs Metabolism team, where he supports PKU. He is trained as a genetic counselor. Resources PKU / Phenylketonuria Phenylalanine hydroxylase deficiency ACT Sheet The Newborn Screening Information Center (NBSIC) Recommended Uniform Screening Panel, or RUSP RUSP overview for families ACMG Newborn Screening ACT Sheets and Algorithms flok health Baby’s First Test: Newborn Screening Information National PKU Alliance Referenced DNA Today Podcast Episode #394 How Newborn Sequencing Could Transform Pediatric Rare Disease Care in Florida Connect With Us Luckily you don’t have to wait long for a brand-new episode of DNA Today, we drop episodes every Friday! Until then, why not dive into our library of over 400 episodes? Binge them all on Apple Podcasts, Spotify, our website, or wherever you love to listen, just search “DNA Today.” Prefer watching? We’ve got you covered! The video component of this episode is available on our YouTube channel and website. Some of these episodes were filmed at our home studio, the iconic NBC Universal Stamford Studios.  DNA Today is hosted and produced by K

What if the future of human health doesn’t just begin in the clinic, but in the soil? In this episode of DNA Today, we explore the new documentary Groundswell, the final chapter in the regenerative agriculture documentary trilogy that began with Kiss the Ground and continued with Common Ground. Narrated by Demi Moore and Woody Harrelson, Groundswell follows regenerative agriculture solutions across five continents, showing how restoring soil health can support biodiversity, food systems, local economies, climate resilience, and human health. This episode takes DNA Today into a different but deeply relevant corner of genetics and genomics. While we often focus on human genetics, Groundswell broadens the lens to show how genetics is embedded in entire ecosystems. Soil is alive with microbial diversity. Plants depend on complex relationships with bacteria, fungi, insects, and the environment around them. Crop diversity and seed diversity can influence resilience to drought, pests, disease, and changing climate conditions. Human health is also shaped not only by our DNA, but by the environments we live in, the food we eat, the water we drink, the chemicals we are exposed to, and the microbes we encounter. Joining us are Nikki Reed, co-producer of Groundswell, and Rebecca Harrell Tickell, co-director of the film.  About Nikki Reed Many listeners will know Nikki from her role as Rosalie Hale in The Twilight Saga, as well as her work in Thirteen, which she co-wrote and starred in, and her role in The O.C. Beyond acting, Nikki is also a filmmaker, farmer, entrepreneur, and environmental advocate. About Rebecca Harrell Tickell Rebecca Harrell Tickell is an award-winning filmmaker, producer, and environmental activist whose work includes Kiss the Ground, Common Ground, and now Groundswell. Through this trilogy, Rebecca and her collaborators have helped bring regenerative agriculture into mainstream conversations about climate, food, health, and the future of farming. In This Episode, We Discuss How Nikki Reed’s experience in Twilight shaped the way she thinks about storytelling, cultural influence, and using her platform for impact Why Nikki became involved in regenerative agriculture and how her connection to food, farming, and environmental advocacy became personal What regenerative agriculture means and how it differs from conventional agriculture Why healthy soil is not just “dirt,” but a living ecosystem filled with microbes, fungi, roots, insects, and organic matter How soil health connects to plant health, nutrient cycling, water retention, and ecosystem resilience Why biodiversity matters above and below ground, from soil microbial communities to crops, pollinators, insects, animals, and humans How regenerative agriculture reframes food systems as regionally specific, community-based, and connected to local ecosystems The connection between food, chemical exposures, the environment, and gene-environment interactions Why the guests see regenerative agriculture as both a practical solution and a hopeful movement How storytelling can help make complex topics like soil science, microbes, farming systems, and climate resilience more accessible Fact Check & Context This episode includes a passionate discussion about regenerative agriculture, pesticides, cancer, fertility, carbon, and soil health. As with many topics at the intersection of environment and health, the science is complex. Here are a few important clarifications and sources for our audience members who want to dig deeper. Cancer Rates The episode references concern about rising cancer rates, including pediatric cancer and cancers in younger adults. The most accurate summary is nuanced. For childhood and adolescent cancers in the U.S., a 2025 analysis found that age-standardized cancer incidence increased from 2001 to 2016, then decreased from 2016 to 2022. Cancer death rates among U.S. youth ages 0–19 also declined 24% from 2001 to 2021, according to CDC

Recertification is changing for genetic counselors. The American Board of Genetic Counseling (ABGC) now requires completion of new Continuing Competence Learning Scenarios as part of maintaining the CGC credential. These are not traditional quizzes with one correct answer. Each scenario presents a complex genetic counseling situation, followed by reflective questions, peer rationales, and educational resources designed to support lifelong learning and continuing competence. To help us understand why this change was made and what genetic counselors need to know, we are joined by three guests from ABGC: Monica Marvin and Dr. Claire Davis, co-chairs of ABGC’s Continuing Competence Committee, and Heather Rich, Executive Director at Smithbucklin, who manages ABGC operations. We break down why these Learning Scenarios were created, how the requirement works, what counts toward recertification, and how ABGC is approaching competence in a field where many real-world situations are nuanced, reflective, and shaped by context.   In This Episode, We Discuss: Why ABGC reevaluated the recertification process for certified genetic counselors What was missing from a recertification model based primarily on CEUs or reexamination What Continuing Competence Learning Scenarios are, and what they are not How these scenarios differ from traditional quizzes or tests Why there may be more than one thoughtful way to respond to a complex genetic counseling situation How panelist rationales help Diplomates understand the reasoning of other competent practitioners How the new requirement is being phased in based on recertification cycle What genetic counselors in current recertification cycles need to know about voluntary scenario completion How each scenario earns 0.1 CEU and how those CEUs fit into existing recertification requirements How often new Learning Scenarios will be published How scenarios are developed and reviewed by ABGC’s Continuing Competence Committee Why review by the DEIJ Committee is an important part of the process How Learning Scenarios can address complex topics such as bias, cultural humility, access, identity, and patient-centered care Whether future scenarios may expand beyond patient-facing clinical roles to include genetic counselors working as medical science liaisons, variant curators, educators, and other nontraditional roles   The Panel: Monica Marvin, MS, CGC, is the Program Director for the University of Michigan Genetic Counseling Graduate Program and Clinical Professor of Internal Medicine and Human Genetics at the University of Michigan. Monica was the inaugural President of the Michigan Association of Genetic Counselors, the 2011 Chair of the National Society of Genetic Counselors Access and Service Delivery Committee and the 2014 Chair of the National Society of Genetic Counselors Payor Subcommittee. She also served on the Board of Directors for the National Society of Genetic Counselors in 2016 and 2017 and is a current member of the Accreditation Council of Genetic Counselors Program Review Committee. In addition, Monica serves on the Advisory Board for multiple genetic counseling programs, and is the co-chair of the American Board of Genetic Counselors Continuing Competence Committee. She received the 2014 Strategic Leader award from the National Society of Genetic Counselors and was instrumental in the 2018 passage of legislation to license genetic counselors in the state of Michigan. She is passionate about the provision of high-quality genetic counseling services.   Claire Davis, EDD, MS, CGC has contributed to the learning, growth, and development of genetic counselors for 19 years. She received her Master of Science in Genetic Counseling from the Icahn School of Medicine at Mount Sinai in 2007. She earned a doctorate in Adult Learning and Leadership from Teachers College, Columbia University, completing a dissertation on how genetic counselors learn to incorporate innovations into their practi

Anxiety is one of the most common mental health conditions, but for many people, it can also feel deeply isolating. Current treatments such as therapy, SSRIs, and benzodiazepines can be life-changing, but they do not work for everyone, and they often manage symptoms rather than addressing the underlying biology of anxiety. In this episode of DNA Today, host Kira Dineen is joined by Dr. Troy Rohn, neuroscientist, professor at Boise State University, and Co-founder and Director of Preclinical Studies at Cognigenics. Dr. Rohn is also the author of Brain Medicine: Breakthroughs in Gene Therapy for Anxiety & Other Neuropsychiatric Disorders, a brand new book exploring how CRISPR, RNA interference, neurogenetics, and precision psychiatry could reshape the future of mental health treatment. We take a deeply personal and scientific look at anxiety. Dr. Rohn shares how his own experiences with chronic anxiety and PTSD helped inspire his work, while also explaining the brain biology behind anxiety, including the roles of serotonin, GABA, the amygdala, hippocampus, insula, and thalamus. A major focus of the episode is the 5-HT2A serotonin receptor, produced through the HTR2A gene, and why this receptor has become an important target in Dr. Rohn’s preclinical research. Kira and Dr. Rohn explore how today’s treatments broadly influence serotonin signaling, while emerging gene-based approaches may someday allow researchers to more precisely reduce or silence specific pathways involved in anxiety. The episode also breaks down the difference between CRISPR gene editing and RNA interference, including why reversibility, safety, off-target effects, and long-term consequences matter so much when discussing potential therapies for the brain. Dr. Rohn also explains one of the biggest challenges in the field: getting therapies across the blood-brain barrier. Because this science is still preclinical, the conversation also focuses on how to talk about hope responsibly. Could gene therapy someday help treat anxiety at its source? Possibly. But there are major scientific, regulatory, ethical, and access questions that need to be answered before these approaches could become part of clinical care.   In This Episode, We Discuss: The lived experience of anxiety, PTSD, and chronic hypervigilance Why anxiety is shaped by both genes and environment How current anxiety treatments work, including SSRIs, benzodiazepines, CBT, and service animals Why SSRIs can help some people but fall short for others The role of serotonin, GABA, and brain circuits in anxiety What the 5-HT2A receptor is and why it matters How the HTR2A gene leads to production of the 5-HT2A receptor protein The difference between broadly changing serotonin levels and targeting a specific receptor pathway How CRISPR could be used to make more permanent DNA changes How RNA interference could offer a more temporary or reversible way to reduce gene expression What preclinical animal studies can and cannot tell us Why the blood-brain barrier is such a major challenge for brain-targeted therapies Ethical questions around using gene therapy for mental health conditions How to balance scientific excitement with caution and realistic expectations   Guest Bio Dr. Troy Rohn is a neuroscientist, professor at Boise State University, and Co-founder and Director of Preclinical Studies at Cognigenics. His research has focused on neurological disorders, including Alzheimer’s disease, anxiety, and memory impairment. In his book Brain Medicine: Breakthroughs in Gene Therapy for Anxiety & Other Neuropsychiatric Disorders, Dr. Rohn explores how gene therapy, CRISPR, RNA interference, and precision psychiatry could open new possibilities for treating anxiety and other brain-based conditions.   About the Book Brain Medicine: Breakthroughs in Gene Therapy for Anxiety & Other Neuropsychiatric Disorders explores the future of mental health treatment through the lens of gene therapy and neuroge

What if we could study melanoma not just cell by cell, but in the exact place those cells live inside the tumor? That is the promise of spatial biology. In this episode of DNA Today, we explore how emerging genomic technologies are transforming melanoma research by allowing scientists to examine not only which cells are present in a tumor, but where they are located, how they interact, and why those relationships matter. May is Melanoma Awareness Month, making this an important time to spotlight how tools like spatial transcriptomics, single-cell sequencing, and multiomics approaches are helping researchers better understand tumor behavior, immune response, and treatment resistance. Joining us are Professors Thomas Tüting and Andreas Braun, German dermatologists and researchers whose work focuses on melanoma, tumor immunology, and translational cancer research. We are also joined by Dr. Jia Hui Khoo, Product Manager at MGI, who brings expertise in spatial biology and the technologies helping make this research possible. Together, we discuss an exciting melanoma research project profiling human melanoma samples from the University Hospital Magdeburg’s biobank, using MGI’s DCSP approach, which spans DNA, cell omics, spatial omics, and proteomics. This work has the potential to deepen our understanding of melanoma biology, tumor heterogeneity, immune landscapes, and the future of precision oncology. In this Episode, We Discuss: How melanoma research and treatment have evolved, especially with the rise of immunology and immunotherapy. Why human melanoma biobanks are so valuable for translational cancer research. How spatial biology helps researchers understand tumors in context, not just as isolated cells. Why the location of cells within a tumor matters for understanding melanoma progression and immune response. How spatial transcriptomics and single-cell sequencing can reveal differences between patients who respond well to immunotherapy and those who do not. What researchers hope to learn by profiling STOmics spatial transcriptomics datasets alongside matched single-cell datasets from human melanoma and mouse models. How MGI’s DNBSEQ and STOmics technologies support oncology research. What MGI’s DCSP approach brings to melanoma research by integrating DNA, cell omics, spatial omics, and proteomics. Why high-resolution spatial technologies like Stereo-seq may be especially important for studying the tumor microenvironment. How multiomics research could eventually inform biomarker discovery, patient stratification, therapeutic development, and the future of human pathology. Guests:  Professor Thomas Tüting, MD is Professor and Chairman of Dermatology at University Hospital Magdeburg in Germany, where his work focuses on tumor immunology, melanoma progression, metastasis, and resistance to cancer immunotherapy. He trained in dermatology at University Hospital Mainz and completed research training in experimental tumor immunology at the University of Pittsburgh. His research has explored how the immune system shapes melanoma biology, including the role of inflammation, tumor plasticity, and the tumor microenvironment in cancer progression and treatment response. In 2024, Professor Tüting was awarded an ERC Synergy Grant with collaborators at Uppsala University to advance immunotherapy research for malignant melanoma and brain tumors, with a focus on the vascular-immune interface and local anti-tumor immune activation.  Professor Andreas D. Braun, MD is a dermatologist and researcher in the Department of Dermatology, Allergology and Venereology at the University Hospital Schlewsig-Holstein in Lübeck. His research centers on melanoma biology, tumor progression, metastatic spread, and mechanisms that influence response or resistance to immunotherapy. Professor Braun has co-authored studies on topics including Hgf-Met and BRAF signaling in melanoma, tumor-intrinsic Toll-like receptor 4 signaling, MHC-I downregulation, CD8