TL;DR
The role of the PI3K/AKT pathway in the PIK3CA-related overgrowth is clarified, with one pediatric patient carrying a novel mosaic de novo in-frame deletion mutation in the PIK3CA gene identified.
Plasma proteomic analysis of patients with CILD40 identified significant enrichment of pathways related to platelet activation, complement and coagulation cascades and differential signatures in CILD40, highlighting the potential of plasma proteomics for understanding distinct pathogenic mechanisms across PCD subtypes.
The co-occurrence of variants in AKAP4 and RNF220 may suggest an oligogenic etiology of NOA and contribute to the phenotypic variability associated with AKAP4 variants.
It is demonstrated that oncogenesis in LFS can be driven by partial impairment of functional p53, rather than dominant-negative or gain-of-function mutations alone.
This case broadens the mutational spectrum of YIF1B-related disease and highlights the distinctive clinical pattern of KABAMAS, with an 11-month-old Turkish girl with profound developmental delay, absent head control, poor feeding, laryngomalacia and cortical visual impairment.
Sirenomelia is a rare and lethal congenital malformation representing the most severe form of caudal dysgenesis, with a stillbirth rate of up to 53%. The genetic basis of sirenomelia remains poorly understood. Consequently, in this study, we aimed to comprehensively characterize genomic variants and explore potential pathogenic mechanisms in sirenomelia. Whole-genome resequencing was performed on peripheral blood mononuclear cells from one patient with sirenomelia and one matched healthy newborn. Variants were identified and prioritized using the gnomAD and ClinVar population databases. single nucleotide polymorphisms (SNP)/InDel and structural variants were further analyzed using multidimensional functional enrichment approaches. A total of 116 candidate genes harboring rare and potentially deleterious SNP/InDel variants were identified, including BMP5 and BMP6. Structural variant analysis revealed 549 sirenomelia-specific variants involving genes such as TWSG1 and Retinoic acid receptor beta (RARB). Functional enrichment revealed that these genes were predominantly involved in key developmental pathways, including BMP, WNT and TGF-β signaling. Integrated analysis indicated convergent disruption of signaling networks regulating posterior axis development, particularly those associated with kidney formation, cloacal partitioning, and limb patterning. These findings support a multilayered pathogenic model in which genetic variants collectively disrupt the core developmental pathways involved in posterior axis formation, vasculogenesis, and organogenesis. Our findings provide a genomic framework for understanding the molecular basis of sirenomelia and identify potential targets for future research and clinical applications.
Structural prediction and coimmunoprecipitation indicate that the compound variants may be associated with the development of MSS by weakening SIL1-BiP binding, and preliminary functional evidence that the identified variants may affect SIL1 abundance and SIL1-BiP interaction, supporting their relevance to the MSS phenotype.
We use cookies to run the site and, with your consent, for analytics and to show ads. See our Cookie Policy.
