Ultimele descoperiri despre creier | BOABE DE CUNOAȘTERE | cu Sergiu Pașca

18 Mar 2026 · 91 min
1:30:57

In this episode of the Romanian podcast Boabe de Cunoaștere, host Mihail Pautov interviews Prof. Sergiu Pașca, a Stanford psychiatrist who leads the Stanford Brain Organogenesis Center. The conversation spans Pașca’s personal journey from a medical graduate in Cluj to a tenured professor at Stanford, highlighting the unconventional path he took without a PhD, the role of an IBRO post‑doctoral fellowship, and the start‑up‑style funding model that supports his lab. They discuss the technical breakthrough of reprogramming patient skin fibroblasts into induced pluripotent stem cells (iPSCs) and differentiating them into neurons, which are then assembled into three‑dimensional brain organoids (assembloids). Pașca explains how the technology evolved from two‑dimensional neuron plates to ~3 mm organoids that can be cultured in large numbers, enabling disease modeling for psychiatric conditions such as autism, schizophrenia, epilepsy, Parkinson’s and Alzheimer’s. A major case study is the rare Timothy syndrome, caused by a CACNA1C calcium‑channel mutation; using patient‑derived organoids the team identified the cellular defect, screened an antisense oligonucleotide that corrects the channel’s function, and moved the therapy through animal safety studies toward a human intrathecal trial. The interview also covers the creation of increasingly complex multi‑region assembloids (cortico‑spinal‑muscle constructs, pain‑pathway assembloids, and the named AssembloEase), their emergent properties such as muscle contraction, and the ethical and translational challenges of transplanting human organoids into mouse brains, including the proportion of human tissue and “Frankenstein” concerns. Pașca reflects on critical developmental windows that limit integration of organoids in adult brains, using language acquisition as an example, and discusses emerging cell‑therapy approaches for Parkinson’s disease, including dopaminergic neuron differentiation, intrathecal delivery, and immunosuppression. He shares a vision for a future molecular psychiatry where diagnoses are based on molecular mechanisms rather than behavior, offering hope for conditions like autism and ADHD. Finally, he gives practical brain‑health advice, emphasizing regular physical exercise (e.g., five hours of walking per week) as the most evidence‑based intervention, while noting the limited data on supplements. He also discusses meditation practices, especially transcendental meditation, and the modest evidence for B‑vitamin supplementation only when deficient. The episode weaves personal anecdotes, scientific detail, and broader reflections on the trajectory of brain research.

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