OMIA 001283-9925 : Xanthinuria, generic in Capra hircus

In other species: dog , domestic cat , cattle , giant otter

Possibly relevant human trait(s) and/or gene(s)s (MIM numbers): 278300 (trait) , 603592 (trait)

Mendelian trait/disorder: unknown

Considered a defect: yes

Cross-species summary: Animals with hereditary xanthinuria (excretion of large amounts of xanthine in the urine) may be asymptomatic, may have subclinical uroliths (xanthine stones), or present with clinical signs of urolithiasis. Urolith formation can be influenced by other biologic and environmental factors such as sex, diet and urine properties. Xanthinuria, type I (OMIA002445) is caused by variation in the XDH gene and xanthinuria, type II (OMIA 001819) is caused by variation in the MOCOS gene. Information relating to xanthinuria without identified causal variants is listed under xanthinuria, generic (OMIA 001283).

Species-specific description: Vail et al. (2019) provided "the first report describing the clinical presentation and pathology associated with xanthine urolithiasis in a goat. ... Exonic sequencing of xanthine dehydrogenase (XDH) and molybdenum cofactor sulfurase (MOCOS) identified 2 putative pathogenic variants: a heterozygous XDH p.Leu128Pro variant and a homozygous MOCOS p.Asp303Gly variant." The authors concluded that "The data support hereditary xanthinuria, but functional studies are needed to conclusively determine the causal variant(s)."

Clinical features: Vail et al. (2019): "A 2-year-old mixed breed goat was presented for a 1-day history of anorexia and 1 week of weight loss."

Pathology: Vail et al. (2019): "Serum biochemistry disclosed severe azotemia. Abdominal ultrasound examination showed decreased renal corticomedullary distinction, poor visualization of the renal pelves, and dilated ureters. On necropsy, the kidneys were small, the pelves were dilated, and the medulla was partially effaced by variably sized yellow nephroliths. Histologically, cortical and medullary tubules were distended by yellow-brown, multilayered crystals. Stone composition was 100% xanthine."

Reference


2019 Vail, K.J., Tate, N.M., Likavec, T., Minor, K.M., Gibbons, P.M., Rech, R.R., Furrow, E. :
Hereditary xanthinuria in a goat. J Vet Intern Med :, 2019. Pubmed reference: 30758870. DOI: 10.1111/jvim.15431.

Edit History


  • Created by Frank Nicholas on 27 Feb 2019
  • Changed by Frank Nicholas on 27 Feb 2019
  • Changed by Imke Tammen2 on 20 Aug 2021