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COL4A1-associated disorders encompass a wide range of hereditary vasculopathy, including porencephaly and HANAC (adult-onset hemorrhagic stroke with cerebral aneurysm and retinal arterial tortuosity, renal cysts, and thenar muscle cramp). It remains elusive whether or not porencephaly and HANAC are molecularly distinctive disorders due to different classes of mutations. We report on a girl with porencephaly and an episode of microangiopathic hemolysis in infancy and her father with HANAC, both of whom had a heterozygous missense mutation of COL4A1 (c.3715G>A, p.G1239R). The current observation implies phenotypic diversities of COL4A1 mutations.
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http://dx.doi.org/10.1002/ajmg.a.36823 | DOI Listing |
Clin Neurol Neurosurg
February 2023
Genetics and Rare Diseases Research Division, Unit of Neuromuscular and Neurodegenerative Disorders, Department of Neurosciences, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy.
Dominant COL4A1 and COL4A2 mutations cause a broad spectrum of cerebrovascular diseases, whose onset varies from fetal to adult life, mostly represented by prenatal-neonatal intracerebral hemorrhage with porencephaly and by periventricular leukomalacia with calcifications, corresponding clinical diagnoses of cerebral palsy mimics. Axenfeld-Rieger syndrome with leukoencephalopathy, HANAC syndrome, young- and late-onset stroke and malformation of cortical development are rarer presentations. Very recently, the existence of recessive COL4A1- and COL4A2-related forms has been documented.
View Article and Find Full Text PDFHum Genet
October 2019
Department of Medicine, Boston Children's Hospital, Enders 561, Harvard Medical School, 300 Longwood Avenue, Boston, MA, 02115, USA.
Congenital anomalies of the kidney and urinary tract (CAKUT) are the most common cause of chronic kidney disease (~ 45%) that manifests before 30 years of age. The genetic locus containing COL4A1 (13q33-34) has been implicated in vesicoureteral reflux (VUR), but mutations in COL4A1 have not been reported in CAKUT. We hypothesized that COL4A1 mutations cause CAKUT in humans.
View Article and Find Full Text PDFNephrol Dial Transplant
November 2016
UCL Centre for Nephrology, University College, London, UK.
Background: Hereditary microscopic haematuria often segregates with mutations of COL4A3, COL4A4 or COL4A5 but in half of families a gene is not identified. We investigated a Cypriot family with autosomal dominant microscopic haematuria with renal failure and kidney cysts.
Methods: We used genome-wide linkage analysis, whole exome sequencing and cosegregation analyses.
Matrix Biol
January 2016
Department of Genetics, University of Szeged, Középfasor 52, H-6726 Szeged, Hungary. Electronic address:
The basal lamina (BM) contains numerous components with a predominance of type IV collagens. Clinical manifestations associated with mutations of the human COL4A1 gene include perinatal cerebral hemorrhage and porencephaly, hereditary angiopathy, nephropathy, aneurysms and muscle cramps (HANAC), ocular dysgenesis, myopathy, Walker–Warburg syndrome and systemic tissue degeneration. In Drosophila, the phenotype associated with dominant temperature sensitive mutations of col4a1 include severe myopathy resulting from massive degradation of striated muscle fibers, and in the gut, degeneration of circular visceral muscle cells and epithelial cells following detachment from the BM.
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