Stephanie Efthymiou, Marcello Scala, Vini Nagaraj, Katarzyna Ochenkowska, Fenne L Komdeur, Robin A Liang, Mohamed S Abdel-Hamid, Tipu Sultan, Tuva Barøy, Marijke Van Ghelue, Barbara Vona, Reza Maroofian, Faisal Zafar, Fowzan S Alkuraya, Maha S Zaki, Mariasavina Severino, Kingsley C Duru, Robert C Tryon, Lin Vigdis Brauteset, Morad Ansari, Mark Hamilton, Mieke M van Haelst, Gijs van Haaften, Federico Zara, Henry Houlden, Éric Samarut, Colin G Nichols, Marie F Smeland, Conor McClenaghan
Loss-of-function mutation of ABCC9, the gene encoding the SUR2 subunit of ATP sensitive-potassium (KATP) channels, was recently associated with autosomal recessive ABCC9-related intellectual disability and myopathy syndrome (AIMS). Here we identify nine additional subjects, from seven unrelated families, harboring different homozygous LoF variants in ABCC9 and presenting with a conserved range of clinical features. All variants are predicted to result in severe truncations or in-frame deletions within SUR2, leading to the generation of non-functional SUR2-dependent KATP channels...
January 13, 2024: Brain