Phospholamban gene mutations are not associated with hypertrophic cardiomyopathy in patients from southern Poland

Background: Hypertrophic cardiomyopathy (HCM) is a genetic disease. The role of phospholamban (PLN) gene mutations is the development of HCM has not been established. Aim: To screen or PLN gene mutations in a group of HCM patients from the southern Poland. Methods: We included 50 consecutive patients (31 males, mean age 42 +/- 14 years) diagnosed with HCM on the basis of typical clinical, echocardiographic, and haemodynamic features. The control group consisted of 50 (sex-, age-matched) healthy subjects with normal echocardiograms. Results: The genetic analysis was focused on R9C mutation with the ability to block PLN phosphorylation leading to chronic inhibition of SFRCA2a activity. Another analysed mutation causing the alteration of PLN level in cells was related to the substitution of a leucine residue at position 39 with a premature stop codon (L39X). The sequence analysis of selected coding regions of the PLN gene did not show the presence of mutations in either the patients or the control subpopulations. Conclusions: Systematic mutation screening did not reveal any mutation in the selected regions of the PLN gene. Additionally, no polymorphisms were detected in any patients. therefore, PLN gene mutations were not found to be associated with HCM in the study group.