Monogenic short stature

Gene: MTX2

Comment on phenotypes: Previous phenotypes (overwritten): Mandibuloacral dysplasia;lipodystrophy;arterial calcification;growth retardation

Created: 26 Mar 2024, 4 p.m. | Last Modified: 26 Mar 2024, 4 p.m.

Panel Version: 3.39

Green List (high evidence)

The rating of this gene has been updated following NHS Genomic Medicine Service approval.

Created: 3 Mar 2022, 1:49 p.m. | Last Modified: 3 Mar 2022, 1:49 p.m.

Panel Version: 1.100

The Genomics England Clinical Team suggested that this gene should be added to this panel as growth retardation is a phenotype. Therefore, this gene has been given an Amber rating and will be promoted to Green at the next review.

Review from Zornitza Stark on the Lipodystrophy - childhood onset:
"Seven individuals from 5 unrelated families reported with severe progeroid form of MAD with growth retardation, small viscerocranium with mandibular underdevelopment, distal acro-osteolyses, lipodystrophy, altered skin pigmentation, renal focal glomerulosclerosis, and extremely severe hypertension in most cases, eventually associated with disseminated arterial calcification. Loss of MTX2 in patients' primary fibroblasts led to loss of Metaxin-1 (MTX1) and mitochondrial dysfunction, including network fragmentation and oxidative phosphorylation impairment. Furthermore, patients' fibroblasts were resistant to induced apoptosis, leading to increased cell senescence and mitophagy and reduced proliferation. Sources: Literature
Zornitza Stark (Australian Genomics), 5 Oct 2020"
Sources: Literature, Expert Review

Created: 13 Nov 2020, 1:32 p.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
Mandibuloacral dysplasia; lipodystrophy; arterial calcification; growth retardation

Publications

• 32917887