A multicenter retrospective analysis of 15 pediatric patients from 12 unrelated families with genetically confirmed tubulinopathies across five tertiary centers in Turkey identified a rare case of TUBGCP2-related tubulinopathy presenting with cystic leukomalacia, expanding the known radiological spectrum.
CASK-related disorders may present with severe neurodevelopmental impairment and cerebral palsy–like phenotypes, even in the absence of characteristic neuroimaging findings, which should raise suspicion for CASK-related disorders.
I. Pacheva, Elena Timova, T. Todorov et al.· Frontiers in Psychiatry· 0 citations
It is indicated that reduced protein stability and functional impairment of β-tubulin represent key pathogenic mechanisms underlying this condition, and the experimental evidence further supports the implication of TUBB dysfunctions in haematological abnormalities.
Ilaria Svezia, Riccardo Zocchi, Michela Piccione et al.· Orphanet Journal of Rare Dis...· 0 citations
The findings support a possible domain‐related genotype–phenotype association for the role of ALG13 in neurodevelopmental disorders and provide additional developmental context for the role of ALG13 in neurodevelopmental disorders.
Song Su, Wandong Hu, Ying Ren et al.· Human Mutation· 0 citations
The results highlight the need for a unified diagnostic framework for ATP1A3-related disorders and demonstrate the feasibility and scientific value of coordinated rare disease research in resource-limited settings.
Victor Rebelo Procaci, Raphael Pinheiro Camurugy da Hora, Anna Maria Gomes et al.· Neurology: Genetics· 0 citations
BACKGROUND
Pathogenic missense variants in the MORC2 gene are associated with two distinct disorders: Charcot-Marie-Tooth disease type 2Z (CMT2Z) and the recently described DIGFAN (developmental delay, impaired growth, dysmorphic facies and axonal neuropathy) phenotype, which encompasses a broad range of clinical manifestations that vary significantly between individuals.
METHODS
Clinical and imaging data from 16 patients were collected. Western blot analysis was performed on 10 identified variants in affected patients as well as on two novel variants without clinical data. Those missense variants were introduced into the wild-type vector transfected into HEK293T cells, and western blot analysis was performed to assess protein expression level.
RESULTS
A total of 11 different missense variants in the MORC2 gene were identified in our cohort, including four novel variants. We demonstrate that early-onset MORC2-associated disorders segregate into two principal neurological phenotypes: a predominantly neuromuscular form and a central nervous system-predominant form. The p.Ser87Leu variant, which defines the neuromuscular cluster, was uniquely characterised by a significant reduction in MORC2 protein levels, distinguishing it mechanistically from other variants. Overall, western blot analysis revealed no statistically significant difference in protein expression levels between variants related to CMT2Z and DIGFAN cases.
CONCLUSION
A comparison of our patients with previously reported cases revealed an intriguing trend suggesting a probable dependence of the leading clinical features on specific variants in the MORC2 gene. Further accumulation of patient data is required to determine whether this observation correlates with other specific variants.
A. Murtazina, Eugenii Tatarsky, I. Viakhireva et al.· Journal of Medical Genetics· 0 citations
“hemiconvulsion-hemiplegia-epilepsy syndrome” is identified as a distinct feature and potential prognostic indicator for middle domain variants in DNM1L variants, which are predominantly missense, with the middle domain as a hotspot.
Han Xu, Chaolong Xu, Ying Zou et al.· Frontiers in Neurology· 0 citations