Unexplained young onset end-stage renal disease - additional genes

Gene: WDR72

Green List (high evidence)

The rating of this gene has been updated to Green and the mode of inheritance set to 'BIALLELIC, autosomal or pseudoautosomal' following NHS Genomic Medicine Service approval.

Created: 2 May 2024, 2:13 p.m. | Last Modified: 2 May 2024, 2:13 p.m.

Panel Version: 4.3

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Green List (high evidence)

This gene has been added to this panel with green rating as it was present in R257 Unexplained young onset end-stage renal disease panel (v5.1) with the same rating before it was made a super panel.

Created: 25 Sep 2024, 9:36 p.m. | Last Modified: 25 Sep 2024, 9:36 p.m.

Panel Version: 0.65

Comment on list classification: As this gene has been tagged for promotion to green rating in 'R198 Renal tubulopathies' (https://panelapp.genomicsengland.co.uk/panels/292/gene/WDR72/) and 'R256 Nephrocalcinosis or nephrolithiasis' (https://panelapp.genomicsengland.co.uk/panels/149/gene/WDR72/) this gene should be promoted to green rating in this panel as well.

Created: 11 Jan 2024, 3:34 p.m. | Last Modified: 11 Jan 2024, 3:56 p.m.

Panel Version: 3.34

Reviews from Eleanor Williams in 'R198 Renal tubulopathies' panel:

Additional families reported with distal renal tubular acidosis, along with amelogenesis imperfecta.

PMID: 30779877 (Zhang et al 2019) - 6 families (1 African, 5 Turkish) identified using WES with biallelic WDR72 variants. The affected members showed generalized hypomaturation Amelogenesis imperfecta. 2 families, although unrelated, shared the same variant. 3 out of the 8 tested patients showed decreased serum pH, consistent with a diagnosis of renal tubular acidosis.

PMID: 31959358 - (Jobst-Schwan et al 2020) - 2 families (Indian, Turkish) with different homozygous variants in WDR72 identified by WES. All 3 affected individuals had Distal renal tubular acidosis. 1 individual is reported to have nephrocalcinosis.

PMID: 33033857 - Khandelwal et al 2021 - 4 patients, from three unrelated consanguineous families, with RTA and amelogenesis imperfecta. Genome analysis of 3 of the patients identified 3 different homozygous nonsense variants in WDR72. Ultrasound showed bilateral grade I medullary nephrocalcinosis in the 3 patients.
Created: 1 Mar 2023, 9:46 p.m. | Last Modified: 1 Mar 2023, 9:46 p.m.

Panel Version: 3.4

Comment on list classification: Rating this gene as amber as 2 reported families to date.
Created: 12 Feb 2019, 10:38 p.m.

No association with a renal phenotype in OMIM (only with Amelogenesis imperfecta) or Gene2Phenotype.

PMID: 30028003 (Rungroj et al 2018) report 2 families, of Thai and Indian ethnicities, with compound heterozygous and homozygous nonsense WDR72 variations respectively. Both were affected by hereditary distal renal tubular acidosis (dRTA). 3 different variants were found in WDR72; c.1777A>G:p.R593G and c.2522T>A:p.L841Q (predicted as disease causing or damaging, found as compound heterzygotes in family 1) and c.2686C>T:p.R896X. (protein truncating, homozygous in family 2). The truncating variant has been previously reported in a Pakistani family affected by hypomaturation AI, however no other clinical phenotypes in the patients were reported (PMID: 21196691).

Patients in family 1 presented with proximal muscle weakness and/or growth retardation at ages under 7 years. One member of family 1 also had nephrolithiasis and localized enamel hypoplasia. Family 2 has consanguineous parents with one affected child which presented with hypoplastic amelogenesis imperfect in addition to dRTA. She also showed nephrocalcinosis.
Created: 12 Feb 2019, 10:36 p.m. | Last Modified: 1 Mar 2023, 7:39 p.m.

Panel Version: 3.4
Sources: Expert Review

Created: 11 Jan 2024, 3:30 p.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
hereditary distal renal tubular acidosis; distal renal tubular acidosis, MONDO:0015827; Amelogenesis imperfecta, type IIA3, OMIM:613211; amelogenesis imperfecta hypomaturation type 2A3, MONDO:0013181

Publications

• 30028003
• 30779877
• 31959358
• 33033857