Research Paper: 

2016 Smigiel

Date Published : 

02/16/2016

Summary

Novel COL4A1 Mutation in an Infant with Severe Dysmorphic Syndrome with Schizencephaly, Periventricular Calcifications, and Cataract Resembling Congenital Infection

Excerpt

Background: A clinical case is described of growth retardation, severe developmental delay, facial dysmorphic features with microcephaly, as well as congenital cataract, schizencephaly, periventricular calcifications, and epilepsy. Methods: TORCH infection was suspected, but all tests for toxoplasmosis, rubella, cytomegalovirus, and herpes simplex virus were negative for the child and her mother; however, an increased level of antibodies against parvovirus B19 was detected in the proband. Results: Chromosomal analysis and array-CGH showed no aberration. Target capture sequencing for COL4A1 and COL4A2 revealed a de novo COL4A1 mutation (c.2123G>T [p.Gly708Val]). The mutation occurred at a highly conserved Gly residue in the Gly-X-Y repeat of the collagen triple helical domain, suggesting that these mutations may alter the collagen IV a1a1a2 heterotrimers. The mutation was predicted to be damaging. Conclusion: We suggest that COL4A1 testing should be considered in patients with schizencephaly as well as with phenotype suggesting TORCH infection without any proven etiological factors.

Novel COL4A1 Mutation in an Infant with Severe Dysmorphic Syndrome with Schizencephaly, Periventricular Calcifications, and Cataract Resembling Congenital Infection
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