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Meier-Gorlin syndrome (MGS) is a rare autosomal recessive disorder characterized by the triad of short stature, microtia and absent or small patellae. We report on a patient with MGS secondary to biallelic mutations in CDC45 detected on whole exome sequencing (WES). Patients with MGS caused by mutations in CDC45 display a distinct phenotype characterized by craniosynostosis and anorectal malformation. Our patient had craniosynostosis, anorectal malformation and short stature, but did not have the microtia or patella hypoplasia. Our report also highlights the value of WES in aiding diagnosis of patients with rare genetic diseases. In conclusion, our case report and review of the literature illustrates the unique features of CDC45-related MGS as well as the benefits of WES in reducing the diagnostic odyssey for patients with rare genetic disorders.
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http://dx.doi.org/10.1016/j.ejmg.2019.04.009 | DOI Listing |
Genetics
September 2025
Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, Rome 00185, Italy.
The CMG (Cdc45-MCM-GINS) complex is a conserved helicase that plays an essential DNA unwinding function at replication forks. Here, we analyzed the mitotic phenotypes caused in Drosophila by knockdown of Cdc45, Mcm5, and the four GINS genes (Sld5, Psf1, Psf2, and Psf3). Silencing of these genes resulted in virtually identical mitotic phenotypes.
View Article and Find Full Text PDFPrenat Diagn
May 2025
Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.
Objective: Exome sequencing (ES) benefits the genetic work-up for fetuses with structural anomalies, but data on its utility for fetuses without anomalies and stillbirths is more limited. We report our experience with prenatal ES for all three indications.
Method: We retrospectively reviewed results from 344 trio-ES performed for fetuses with structural anomalies (N = 262), stillbirths (N = 39), and fetuses without anomalies (N = 43), many of which had a relevant family history.
Biochim Biophys Acta Mol Cell Res
June 2025
Institute of Biochemistry and Biophysics Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland. Electronic address:
Cdc45 is a non-catalytic subunit of the CMG helicase complex that is recruited to the autonomously replicating sequence at the onset of DNA replication. The Cdc45 protein is required for the initiation of DNA replication as well as for nascent DNA strand synthesis. It interacts with Mcm2 and Psf1 elements of CMG helicase, as well as with Sld3, an initiation factor, and Pol2, the catalytic subunit of DNA polymerase epsilon (Pol ε).
View Article and Find Full Text PDFOrphanet J Rare Dis
December 2024
Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Background: Meier-Gorlin syndrome (MGORS) is a rare autosomal inherited form of primordial dwarfism. Pathogenic variants in 13 genes involved in DNA replication initiation have been identified in this disease, but homozygous intronic variants have never been reported. Additionally, whether growth hormone (GH) treatment can increase the height of children with MGORS is unclear.
View Article and Find Full Text PDFMedicina (Kaunas)
November 2024
Department of Preclinical Disciplines, Faculty of Medicine and Pharmacy, University of Oradea, 410081 Oradea, Romania.
is a rare group of genetic conditions where individuals experience severe growth restriction, both in the womb and after birth. From as early as the fetal stage, those affected are significantly smaller than their peers. What makes PD distinct is its slow but steady growth pattern, resulting in proportionate dwarfism, where all parts of the body are equally shortened.
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