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Changes in desmin expression in patients with cardiac diastolic dysfunction and preserved or reduced ejection fraction.

Abstract：

PURPOSE:Desmin regulates function of mitochondria, T-tubular system and cytosolic Ca(2+) transients. We investigated whether desmin remodeling correlates with diastolic dysfunction and whether progressive desmin abnormalities are accompanied by increasing diastolic dysfunction stages. PATIENTS AND METHODS:Eighty five patients with idiopathic dilated cardiomyopathy and suspected myocarditis without confirmed cardiac tissue inflammation in histopathology assays were included and divided into groups: with preserved EF and reduced EF. After echocardiographic analysis of diastolic dysfunction we identified 2 preserved EF subgroups (normal diastolic function (NDF) and impaired relaxation (IR)) and 3 reduced EF subgroups (NDF, IR, and pseudonormalization). Patients with preserved EF and NDF formed the control group. Tissue desmin staining revealed 4 types of desmin expression: I - normal, with regular pattern of cross-section, IIA - increased with regular pattern, IIB - increased, with irregular pattern and presence of aggregates, III - decreased/lack desmin. RESULTS:Desmin I was observed only in patients with NDF n=8 (100%) in preserved EF and reduced EF, desmin IIA in NDF n=8 (33%) in preserved EF and n=5 (33%) in reduced EF and IR n=16 (66%) in preserved EF and n=10 (66%) in reduced EF. Desmin IIB and III were observed in patients with reduced EF and diastolic dysfunction: IR and pseudonormalization n=9 (39%) and n=2 (29%); n=14 (61%) and n=5 (71%), respectively. Desmin was found to be an independent predictor of diastolic function parameters β=-0.63, R(2)=0.52 for E'; β=0.54, R(2)=0.42 for E/E'. CONCLUSIONS:Increasing desmin abnormalities were correlated with diastolic dysfunction progression. Desmin expression represents a novel factor contributing or paralleling the development of diastolic dysfunction.

journal_name

Adv Med Sci

journal_title

Advances in medical sciences

authors

Pawlak A,Gil RJ,Nasierowska-Guttmejer AM,Kasprzak JD

doi

10.1016/j.advms.2015.01.009

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

148-55

issue

eissn

1896-1126

issn

1898-4002

pii

S1896-1126(15)00010-3

journal_volume

pub_type

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Changes in desmin expression in patients with cardiac diastolic dysfunction and preserved or reduced ejection fraction.