BACKGROUND AND AIM

Hypertrophic cardiomyopathy (HCM) is a common heart problem that affects many cats. Although cats with HCM are symptomatic, some die suddenly or develop congestive heart failure. Therefore, this study aimed to estimate the prevalence of myosin-binding protein C3 (), A31P, and A74T polymorphisms in Maine Coon cats to assess risk factors for diagnosing HCM in cats.

MATERIALS AND METHODS

Forty-nine Maine Coon cats of at least 10 months of age were enrolled in this study. First, clinical parameters, such as heart rate, systolic blood pressure, and echocardiography, were evaluated. Then, polymerase chain reaction, followed by DNA sequencing, was conducted using specific primers for amino acid substitutions caused by genetic variants of -A31P and -A74T polymorphisms.

RESULTS

Investigations showed that the prevalence of -A31P and -A74T mutations in this study was 16.33% and 24.45%, respectively. Moreover, HCM in cats with -A31P and A74T mutations increased with age, body weight, high heart rate, and prolonged isovolumic relaxation time.

CONCLUSION

Therefore, we propose that Maine Coon cats develop HCM due to multiple genetic factors and underlying clinical characteristics in individual cats. Furthermore, relaxation time assessments can be a sensitive technique for HCM screening during its preclinical phase and can help identify the risk of developing HCM. However, further studies are warranted to evaluate the effect of mutations on the phenotypic expression of HCM.