OMIA 001000-9685 : Thrombasthenia in Felis catus

In other species: dog , horse

Possibly relevant human trait(s) and/or gene(s) (MIM number): 273800 (trait)

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal Recessive

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2020

Cross-species summary: More specifically called Glanzmann thrombasthenia.

History: The first report of Glanzmann's thrombasthenia in a cat was by Li et al. (2020).

Molecular basis: Li et al. (2020): "Whole genome sequencing at 30× coverage was used to identify genetic variants that segregated in the affected cat compared to 194 cats from the 99 Lives Sequencing Consortium . . . identified a homozygous c.1986delC frameshift variant in the integrin subunit αIIb (ITGA2B) gene that was not detected in the control population. The p.Pro662fs (ITGA2B P662X) variant terminates translation of the protein at the extracellular domain of the integrin prematurely, which is predicted to affect expression of the β3 unit".

Clinical features: Li et al. (2020): "A nonpedigreed male cat presented with epistaxis, severe bladder hemorrhage, and secondary urethral obstruction after cystocentesis"

Pathology: Li et al. (2020): "Platelet aggregometry identified significant impairment in platelet aggregation in response to ADP and AA compared to the control cat. Targeted protein expression analyses by flow cytometry and immunoblot analysis determined that the surface expression and total expression of the integrin, αIIbβ3, was absent."

Breed: Domestic Shorthair.

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
ITGA2B integrin, alpha 2b (platelet glycoprotein IIb of IIb/IIIa complex, antigen CD41) Felis catus E1 NC_018736.3 (44424595..44410249) ITGA2B Homologene, Ensembl, NCBI gene


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WARNING! Inclusion of a variant in this table does not automatically mean that it should be used for DNA testing. Anyone contemplating the use of any of these variants for DNA testing should examine critically the relevant evidence (especially in breeds other than the breed in which the variant was first described). If it is decided to proceed, the location and orientation of the variant sequence should be checked very carefully.

Breed(s) Variant Phenotype Gene Allele Type of Variant Reference Sequence Chr. g. or m. c. or n. p. Verbal Description EVA ID Year Published PubMed ID(s) Acknowledgements
Domestic Shorthair Glanzmann's thrombasthenia ITGA2B deletion, small (<=20) Felis_catus_9.0 E1 g.44416063del c.1986delC p.(P662fs) ENSFCAT00000003056.6:c.1986delC; p.Pro662fs (Li et al., 2020) 2020 32935881


2020 Li, R.H.L., Ontiveros, E., Nguyen, N., Stern, J.A., Lee, E., Hardy, B.T. :
Precision medicine identifies a pathogenic variant of the ITGA2B gene responsible for Glanzmann's thrombasthenia in a cat. J Vet Intern Med :, 2020. Pubmed reference: 32935881. DOI: 10.1111/jvim.15886.

Edit History

  • Created by Frank Nicholas on 02 Oct 2020
  • Changed by Frank Nicholas on 02 Oct 2020