KIAA1109 Variants Are Associated with a Severe Disorder of Brain Development and Arthrogryposis

Gueneau, L., Fish, R.J., Shamseldin, H.E., Voisin, N., Tran Mau-Them, F., Preiksaitiene, E., Monroe, G.R., Lai, A., Putoux, A., Allias, F., Ambusaidi, Q., Ambrozaityte, L., Cimbalistienė, L., Delafontaine, J., Guex, N., Hashem, M., Kurdi, W., Jamuar, S.S., Ying, L.J., Bonnard, C., Pippucci, T., Pradervand, S., Roechert, B., van Hasselt, P.M., Wiederkehr, M., Wright, C.F., DDD Study, Xenarios, I., van Haaften, G., Shaw-Smith, C., Schindewolf, E.M., Neerman-Arbez, M., Sanlaville, D., Lesca, G., Guibaud, L., Reversade, B., Chelly, J., Kučinskas, V., Alkuraya, F.S., Reymond, A.
American journal of human genetics   102(1): 116-132 (Journal)
Registered Authors
Bonnard, Carine, Fish, Richard, Neerman-Arbez, Marguerite, REVERSADE, Bruno
arthrogryposis, brain malformations, cerebellar hypoplasia, clubfoot, hydrocephaly, whole-exome sequencing
MeSH Terms
  • Adolescent
  • Animals
  • Arthrogryposis/genetics*
  • Brain/diagnostic imaging
  • Brain/embryology*
  • Brain/pathology
  • Child
  • Female
  • Gene Knockdown Techniques
  • Humans
  • Infant
  • Infant, Newborn
  • Magnetic Resonance Imaging
  • Male
  • Mutation/genetics*
  • Pedigree
  • Proteins/genetics*
  • Zebrafish
  • Zebrafish Proteins/genetics
29290337 Full text @ Am. J. Hum. Genet.
Whole-exome and targeted sequencing of 13 individuals from 10 unrelated families with overlapping clinical manifestations identified loss-of-function and missense variants in KIAA1109 allowing delineation of an autosomal-recessive multi-system syndrome, which we suggest to name Alkuraya-Kučinskas syndrome (MIM 617822). Shared phenotypic features representing the cardinal characteristics of this syndrome combine brain atrophy with clubfoot and arthrogryposis. Affected individuals present with cerebral parenchymal underdevelopment, ranging from major cerebral parenchymal thinning with lissencephalic aspect to moderate parenchymal rarefaction, severe to mild ventriculomegaly, cerebellar hypoplasia with brainstem dysgenesis, and cardiac and ophthalmologic anomalies, such as microphthalmia and cataract. Severe loss-of-function cases were incompatible with life, whereas those individuals with milder missense variants presented with severe global developmental delay, syndactyly of 2nd and 3rd toes, and severe muscle hypotonia resulting in incapacity to stand without support. Consistent with a causative role for KIAA1109 loss-of-function/hypomorphic variants in this syndrome, knockdowns of the zebrafish orthologous gene resulted in embryos with hydrocephaly and abnormally curved notochords and overall body shape, whereas published knockouts of the fruit fly and mouse orthologous genes resulted in lethality or severe neurological defects reminiscent of the probands' features.
Genes / Markers
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Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Engineered Foreign Genes