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SOAT1 Nonsense Variant in a Cat With Sebaceous Gland Dysplasia
Lia Kammermann1, Joanne K Mansell2, Barbara G McMahill3
1Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Animal Genetics
|August 10, 2026
Summary
A novel SOAT1 gene variant causes sebaceous gland dysplasia in cats, leading to skin issues like hypotrichosis. This discovery enables genetic testing for diagnosing and managing the condition in feline populations.
Area of Science:
- Veterinary Genetics
- Dermatology
- Molecular Biology
Background:
- Sebaceous gland dysplasia is a rare skin condition in cats.
- Understanding the genetic basis of feline dermatological diseases is crucial for diagnosis and treatment.
Purpose of the Study:
- To identify the genetic cause of sebaceous gland dysplasia in an affected random-bred cat.
- To investigate the role of the sterol O-acyltransferase 1 (SOAT1) gene in feline skin health.
Main Methods:
- Histopathological examination of skin lesions.
- Whole genome sequencing of the affected cat.
- Comparative genomic analysis against a diverse cat population.
Main Results:
- Identified a private homozygous nonsense variant (c.1221G>A) in the SOAT1 gene.
- The SOAT1 variant likely causes abnormal sebaceous gland morphology and hypotrichosis.
- This represents the second reported pathogenic SOAT1 variant in cats.
Conclusions:
- The identified SOAT1 variant is the probable cause of sebaceous gland dysplasia in this cat.
- This finding facilitates the development of diagnostic genetic tests for affected animals and carriers.
- Strengthens the established gene-phenotype correlation between SOAT1 and sebaceous gland dysplasias.