Cellular 'Antennas' Linked to Congenital Heart Defects — SkimNews
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- University of Copenhagen researchers identified a new signaling pathway inside the primary cilium, a microscopic antenna-like structure on most cell surfaces, where proteins TAK1, TAB2 and PKA-Cα work together as a signaling hub that guides embryonic heart development.
- Congenital heart disease affects roughly 2 of every 100 newborns worldwide, or 2.3–2.5 million babies each year, making it one of the most common birth defects per the World Heart Federation and Danish Heart Foundation.
- Lars Allan Larsen, a professor of congenital heart disease at the Department of Cellular and Molecular Medicine, led a study combining genetic data from thousands of patients with experiments in zebrafish, human cells and mouse stem cells to validate the mechanism.
- Søren Tvorup Christensen said the discovery provides a unifying explanation for diseases previously poorly understood: when the ciliary mechanism fails, it can affect brain, kidney and skeletal development alongside the heart in syndromic cases.
- Published in PLOS Biology (2026, DOI: 10.1371/journal.pbio.3003902), the study focused on syndromic rather than isolated heart defects and could eventually aid earlier diagnosis and targeted treatment of rare ciliary disorders, the researchers said.
Why it matters: Congenital heart disease strikes roughly 2.3–2.5 million newborns annually, yet the molecular drivers of syndromic cases — where heart defects co-occur with brain, kidney and skeletal problems — have remained opaque. Identifying the TAK1/TAB2/PKA-Cα signaling hub gives researchers a concrete molecular target for earlier diagnosis and potential therapies across a broad family of ciliopathies.
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