TY - JOUR
T1 - ALPK1 missense pathogenic variant in five families leads to ROSAH syndrome, an ocular multisystem autosomal dominant disorder
AU - Williams, Lloyd B
AU - Javed, Asif
AU - Sabri, Amin
AU - Morgan, Denise J
AU - Huff, Chad D
AU - Grigg, John R
AU - Heng, Xiu Ting
AU - Khng, Alexis J
AU - Hollink, Iris H I M
AU - Morrison, Margaux A
AU - Owen, Leah A
AU - Anderson, Katherine
AU - Kinard, Krista
AU - Greenlees, Rebecca
AU - Novacic, Danica
AU - Nida Sen, H
AU - Zein, Wadih M
AU - Rodgers, George M
AU - Vitale, Albert T
AU - Haider, Neena B
AU - Hillmer, Axel M
AU - Ng, Pauline C
AU - Shankaracharya, null
AU - Cheng, Anson
AU - Zheng, Linda
AU - Gillies, Mark C
AU - van Slegtenhorst, Marjon
AU - van Hagen, P Martin
AU - Missotten, Tom O A R
AU - Farley, Gary L
AU - Polo, Michael
AU - Malatack, James
AU - Curtin, Julie
AU - Martin, Frank
AU - Arbuckle, Susan
AU - Alexander, Stephen I
AU - Chircop, Megan
AU - Davila, Sonia
AU - Digre, Kathleen B
AU - Jamieson, Robyn V
AU - DeAngelis, Margaret M
PY - 2019/9
Y1 - 2019/9
N2 - PURPOSE: To identify the molecular cause in five unrelated families with a distinct autosomal dominant ocular systemic disorder we called ROSAH syndrome due to clinical features of retinal dystrophy, optic nerve edema, splenomegaly, anhidrosis, and migraine headache.METHODS: Independent discovery exome and genome sequencing in families 1, 2, and 3, and confirmation in families 4 and 5. Expression of wild-type messenger RNA and protein in human and mouse tissues and cell lines. Ciliary assays in fibroblasts from affected and unaffected family members.RESULTS: We found the heterozygous missense variant in the ɑ-kinase gene, ALPK1, (c.710C>T, [p.Thr237Met]), segregated with disease in all five families. All patients shared the ROSAH phenotype with additional low-grade ocular inflammation, pancytopenia, recurrent infections, and mild renal impairment in some. ALPK1 was notably expressed in retina, retinal pigment epithelium, and optic nerve, with immunofluorescence indicating localization to the basal body of the connecting cilium of the photoreceptors, and presence in the sweat glands. Immunocytofluorescence revealed expression at the centrioles and spindle poles during metaphase, and at the base of the primary cilium. Affected family member fibroblasts demonstrated defective ciliogenesis.CONCLUSION: Heterozygosity for ALPK1, p.Thr237Met leads to ROSAH syndrome, an autosomal dominant ocular systemic disorder.
AB - PURPOSE: To identify the molecular cause in five unrelated families with a distinct autosomal dominant ocular systemic disorder we called ROSAH syndrome due to clinical features of retinal dystrophy, optic nerve edema, splenomegaly, anhidrosis, and migraine headache.METHODS: Independent discovery exome and genome sequencing in families 1, 2, and 3, and confirmation in families 4 and 5. Expression of wild-type messenger RNA and protein in human and mouse tissues and cell lines. Ciliary assays in fibroblasts from affected and unaffected family members.RESULTS: We found the heterozygous missense variant in the ɑ-kinase gene, ALPK1, (c.710C>T, [p.Thr237Met]), segregated with disease in all five families. All patients shared the ROSAH phenotype with additional low-grade ocular inflammation, pancytopenia, recurrent infections, and mild renal impairment in some. ALPK1 was notably expressed in retina, retinal pigment epithelium, and optic nerve, with immunofluorescence indicating localization to the basal body of the connecting cilium of the photoreceptors, and presence in the sweat glands. Immunocytofluorescence revealed expression at the centrioles and spindle poles during metaphase, and at the base of the primary cilium. Affected family member fibroblasts demonstrated defective ciliogenesis.CONCLUSION: Heterozygosity for ALPK1, p.Thr237Met leads to ROSAH syndrome, an autosomal dominant ocular systemic disorder.
KW - Exome/genetics
KW - Female
KW - Heterozygote
KW - Humans
KW - Hypohidrosis/genetics
KW - Male
KW - Migraine Disorders/genetics
KW - Mutation, Missense/genetics
KW - Optic Nerve/metabolism
KW - Pedigree
KW - Phenotype
KW - Protein Kinases/genetics
KW - Retina/metabolism
KW - Retinal Dystrophies/genetics
KW - Splenomegaly/genetics
U2 - 10.1038/s41436-019-0476-3
DO - 10.1038/s41436-019-0476-3
M3 - Article
C2 - 30967659
SN - 1098-3600
VL - 21
SP - 2103
EP - 2115
JO - Genetics in medicine : official journal of the American College of Medical Genetics
JF - Genetics in medicine : official journal of the American College of Medical Genetics
IS - 9
ER -