Congenital microcephaly and chorioretinopathy due to de novo heterozygous KIF11 mutations: five novel mutations and review of the literature.

Abstract

The microcephaly-lymphedema-chorioretinal dysplasia (MLCRD) syndrome is a distinct microcephaly syndrome. The hallmark features, microcephaly, chorioretinopathy, and lymphedema are frequently recognized at birth. Another clinical entity, the chorioretinal dysplasia, microcephaly and mental retardation syndrome (CDMMR) is a highly overlapping syndrome characterized by more variable lymphedema. Recently, heterozygous mutations in KIF11, a gene encoding a critical spindle motor protein of the Kinesin family, have been reported in individuals with MLCRD, and in individuals with CDMMR. This finding is suggestive of a single clinically variable spectrum. Here, we report on de novo novel mutations of KIF11 in five individuals with severe microcephaly, marked simplification of the gyral pattern on neuroimaging, bilateral chorioretinopathy, and developmental delay. Three patients had congenital lymphedema, and one had congenital bilateral sensorineural hearing loss. This report, therefore, further expands the clinical and molecular spectrum of KIF11-associated microcephaly.

• Authors: Ghayda M Mirzaa, Laura Enyedi, Gretchen Parsons, Sarah Collins, Livija Medne, Carissa Adams, Thomas Ward, Bradley Davitt, Alma Bicknese, Elaine Zackai, Helga Toriello, William B Dobyns, Susan Christian
• Journal: American journal of medical genetics. Part A (Am J Med Genet A) Vol. 164A Issue 11 Pg. 2879-86 (Nov 2014) ISSN: 1552-4833 [Electronic] United States
• PMID: 25115524 (Publication Type: Case Reports, Journal Article, Research Support, N.I.H., Extramural, Review)
• Copyright: © 2014 Wiley Periodicals, Inc.

Chemical References

• KIF11 protein, human
• Kinesins

Topics

• Adolescent
• Brain (pathology)
• Child
• Child, Preschool
• Chromosome Mapping
• DNA Mutational Analysis
• Exons
• Facies
• Female
• Heterozygote
• Humans
• Infant
• Kinesins (genetics)
• Magnetic Resonance Imaging
• Male
• Microcephaly (diagnosis, genetics)
• Mutation
• Phenotype
• Retinal Dysplasia (diagnosis, genetics)
• Syndrome