Renal ciliopathiesGene: ICK
6 affected individuals from 2 Amish families reported originally (founder effect); another Turkish family reported since. However, renal cysts only reported in the Amish families, emerging ciliopathy gene, renal phenotype remains to be elucidated, so not convinced it should be Green on a renal ciliopathy list.
Created: 3 Jan 2020, 4:04 a.m. | Last Modified: 3 Jan 2020, 4:04 a.m.
Panel Version: 1.0
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Endocrine-cerebroosteodysplasia, MIM# 612651
After discussion with the Genomics England clinical team it was decided this gene should be downgraded from green to amber at the next review.
Evidence for a renal phenotype is borderline, with some evidence for an absence of a phenotype.
PMID: 19185282 - 2 Amish families () have the same variant in ICK and 3 infants from these families showed cystically dilated tubules in both the medulla and the cortex of the kidney.
PMID: 27069622 - 1 family is reported where a foetal scan showed large and hyperechogenic kidneys.
PMID: 27466187 - reports a newborn with short rib polydactyly syndrome and a variant in ICK, but no renal phenotype. Two mouse knockout models (PMID: 24853502 and 24797473) also do not show a kidney phenotype.
Created: 9 Jul 2020, 4:44 p.m. | Last Modified: 9 Jul 2020, 4:44 p.m.
Panel Version: 1.23
Added new-gene-name tag, new approved HGNC gene symbol for ICK is CILK1
Created: 25 Sep 2019, 10:02 a.m. | Last Modified: 25 Sep 2019, 10:02 a.m.
Panel Version: 1.0
Comment on list classification: Added gene to panel as Green: Sufficient (3) cases of ICK variants in Endocrine-cerebroosteodysplasia (ECO) patients plus functional studies showing role of ICK in ciliogenesis. A second ECO patient reported in PMID:27069622 showed phenotypes resembling short-rib thoracic dysplasia with polydactyly (SRTD), and the authors say this provides additional support for inclusion of ECO syndrome in the severe ciliary disease spectrum. Helen Brittain confirmed the Green rating saying the phenotype overlaps with Jeune syndrome, and in view of the skeletal, polydactyly, cystic kidney aspects of this disorder HB is happy there is sufficient overlap for inclusion.
Created: 1 Nov 2018, 3:07 p.m.
6 infants from 2 (probably related) Amish families affected with ECO syndrome, and with an R272Q variant in ICK, were reported in PMID 19185282 (2009). Affected individuals had postaxial polydactyly, micromelia (shortening of upper limbs), ulnar deviation of the hands and bowed forearms amongst their limb phenotypes.
PMID:27069622 (2016) report an a second Endocrine-cerebroosteodysplasia (ECO) patient with symptoms that resemble short-rib thoracic dysplasia with polydactyly (SRTD), including polydactyly. PMID:27069622 also performed functional studies and found that ECO patient-derived fibroblasts display reduced ciliogenesis, thus providing additional support for inclusion of ECO syndrome in the severe ciliary disease spectrum.
PMID:27466187 (Paige et al. 2016) performed exome sequencing in a cohort of short rib polydactyly syndrome (SRPS) patients and identified homozygosity for a missense variant p.E80K, in ICK in one SRPS family. The affected male was initially identified by prenatal ultrasound with features of a severe skeletal dysplasia associated with multiple limb anomalies including rhizomelia, mesomelia with bending and polydactyly. The p.E80K mutation abolished resulted in ciliary defects.
Created: 1 Nov 2018, 3:04 p.m.
Tag for-review tag was added to gene: ICK.
Tag watchlist tag was added to gene: ICK.
Tag new-gene-name tag was added to gene: ICK.
gene: ICK was added gene: ICK was added to Renal ciliopathies. Sources: Literature,Expert Review Green Mode of inheritance for gene: ICK was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ICK were set to 19185282; 27069622; 27466187 Phenotypes for gene: ICK were set to short-rib thoracic dysplasia with polydactyly (SRTD); Endocrine-cerebroosteodysplasia, 612651; ECO