iScience (Feb 2025)

Pathogenic KIAA0586/TALPID3 variants are associated with defects in primary and motile cilia

  • Jacqueline E. Taudien,
  • Diana Bracht,
  • Heike Olbrich,
  • Sebastian Swirski,
  • Fulvio D’Abrusco,
  • Bert Van der Zwaag,
  • Maike Möller,
  • Thomas Lücke,
  • Norbert Teig,
  • Ulrika Lindberg,
  • Kai Wohlgemuth,
  • Julia Wallmeier,
  • Anja Blanque,
  • Christos Gatsogiannis,
  • Sebastian George,
  • Christoph Jüschke,
  • Marta Owczarek-Lipska,
  • Dorothee Veer,
  • Hester Y. Kroes,
  • Enza Maria Valente,
  • G. Christoph Korenke,
  • Heymut Omran,
  • John Neidhardt

Journal volume & issue
Vol. 28, no. 2
p. 111670

Abstract

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Summary: Pathogenic variants in KIAA0586/TALPID3 are associated with the ciliopathy Joubert syndrome (JS). We report individuals with KIAA0586/TALPID3 variants affected by primary and motile cilia defects leading to JS and chronic destructive airway disease. DNA variants were detected in three families by sequencing. In two unrelated families, a deep-intronic variant (KIAA0586/TALPID3:c.3990 + 3186G>A) activated a cryptic exon. We performed histological and functional analyses in native and air-liquid interface (ALI) cultured respiratory cells. Primary cilia lengths were measured in patient-derived fibroblasts. Our data associate KIAA0586/TALPID3 variants with a syndrome combining JS and chronic destructive airway disease, reduced number of motile cilia, disorganized basal body location, and ciliary clearance malfunction. Additionally, patient-derived cell lines showed primary cilia defects. Disease causing KIAA0586/TALPID3 variants, including a deep-intronic sequence variant, were associated with primary and motile cilia defects in JS patients. The combination of JS and respiratory symptoms should be considered indicative for KIAA0586/TALPID3 sequence alterations.

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