Kaiyrzhanov R, Perry L, Rocca C, Zaki MS, Hosny H, Araujo Martins Moreno C, Phadke R, Zaharieva I, Camelo Gontijo C, Beetz C, Pini V, Movahedinia M, Zanoteli E, DiTroia S, Vuillaumier-Barrot S, Isapof A, Mehrjardi MYV, Ghasemi N, Sarkozy A, Muntoni F, Whalen S, Vona B, Houlden H, Maroofian R
Annals of clinical and translational Neurology
Ann Clin Transl Neurol. 2022 Jul 23.
Ultra-rare biallelic pathogenic variants in geranylgeranyl diphosphate synthase 1 (GGPS1) have recently been associated with muscular dystrophy/hearing loss/ovarian insufficiency syndrome. Here, we describe 11 affected individuals from four unpublished families with ultra-rare missense variants in GGPS1 and provide follow-up details from a previously reported family. Our cohort replicated most of the previously described clinical features of GGPS1 deficiency; however, hearing loss was present in only 46% of the individuals. This report consolidates the disease-causing role of biallelic variants in GGPS1 and demonstrates that hearing loss and ovarian insufficiency might be a variable feature of the GGPS1-associated muscular dystrophy.