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Siberian pack

General · Cat

DNA panel specific to the Siberian that combines genetic determination of the blood group with screening for pyruvate kinase (PK) deficiency and two aesthetic traits: the colourpoint pattern (typical of the Neva Masquerade variety) and coat dilution. PK deficiency is the only disease included: a hereditary chronic haemolytic anaemia. It is performed from a buccal swab or blood. It allows both prevention of a recessive disease and reliable planning of litter colours.
Inheritance patternMixed: PK/colourpoint/dilution autosomal recessive; blood group codominant
Gene / MutationCMAH (blood group); PKLR (pyruvate kinase deficiency); TYR (colourpoint); MLPH (dilution)
PenetranceIn PK deficiency, homozygotes are affected, although with highly variable age of onset and severity: some cats remain stable for years. Carriers are asymptomatic. The colour traits are fully expressed in homozygotes of the series (colourpoint, dilution), with no clinical relevance.
Sample typesangre con EDTA 1mL
Codetfka
Turnaround time15 days
Price78,44 €
BreedsSiberiano

Incidence

PK deficiency is present in the Siberian with a low frequency (limited data in the breed). The colourpoint allele is frequent in Neva Masquerade lines and dilution is common in many breeding programmes. Population frequency data are limited.

Clinical signs

- PK deficiency: intermittent and chronic haemolytic anaemia with lethargy, pale mucous membranes, jaundice and splenomegaly
- Neonatal isoerythrolysis due to blood group incompatibility
- Colourpoint and dilution: aesthetic traits without clinical signs

History

The Siberian is a natural Russian breed, and its colourpoint variety (Neva Masquerade) is explained by the classic point allele of the TYR gene, molecularly characterised in 2005. Pyruvate kinase deficiency, initially described in the Abyssinian, was later detected in the Siberian, with identification of the causative variant in the PKLR gene, which allowed a specific test. Coat dilution is associated with the MLPH gene, one of the best-characterised colour genes in mammals. The AB blood group system was deciphered in 2007 with the identification of the CMAH gene.

Breeder management

- Never mate two carriers of PK deficiency: an expected 25% of the litter would be affected
- PK carriers can be mated with clear animals and gradually withdrawn rather than excluded
- Determine the blood group before mating to prevent neonatal isoerythrolysis
- Use the TYR and MLPH results to predict litter colours, with no health implication

Specialist notes

In Siberians with anaemia or intermittent lethargy, include PK deficiency in the differential diagnosis and consider a complete blood count with reticulocytes and enzyme activity. The genetic blood group predicts the b allele; cross-matching is recommended before transfusions. The colour traits have no clinical relevance whatsoever.

References

1. Bighignoli B et al. 2007, mutaciones de CMAH asociadas al grupo AB felino. BMC Genet. PMID: 17553163
2. Lyons LA et al. 2005, mutaciones de tirosinasa asociadas al patrón siamés y burmés del gato. Anim Genet. PMID: 15771720
3. Grahn RA et al. 2012, deficiencia de piruvato quinasa eritrocítica en múltiples razas felinas. BMC Vet Res. PMID: 23110753
4. Ishida Y et al. 2006, deleción homocigota en MLPH causante de la dilución del pelaje felino. Genomics. PMID: 16860533
5. Lyons LA 2015, DNA mutations of the cat (revisión). PMID: 25701860

Tests included in this pack (4)

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Price: 78,44 € · Turnaround time: 15 days

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