CIRIMAT, Université de Toulouse, Université Paul Sabatier, Equipe PHYPOL, 31062 Toulouse, France.
Department of Cardiology, Hospital de la Santa Creu i Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), Universitat Autonoma de Barcelona, 08193 Barcelona, Spain.
Biomolecules. 2020 Oct 22;10(11):1471. doi: 10.3390/biom10111471.
Few studies have analyzed the potential of biophysical parameters as markers of cardiac remodeling post-myocardial infarction (MI), particularly in human hearts. Fourier transform infrared spectroscopy (FTIR) illustrates the overall changes in proteins, nucleic acids and lipids in a single signature. The aim of this work was to define the FTIR and lipidomic pattern for human left ventricular remodeling post-MI. A total of nine explanted hearts from ischemic cardiomyopathy patients were collected. Samples from the right ventricle (RV), left ventricle (LV) and infarcted left ventricle (LV INF) were subjected to biophysical (FTIR and differential scanning calorimetry, DSC) and lipidomic (liquid chromatography-high-resolution mass spectrometry, LC-HRMS) studies. FTIR evidenced deep alterations in the myofibers, extracellular matrix proteins, and the hydric response of the LV INF compared to the RV or LV from the same subject. The lipid and esterified lipid FTIR bands were enhanced in LV INF, and both lipid indicators were tightly and positively correlated with remodeling markers such as collagen, lactate, polysaccharides, and glycogen in these samples. Lipidomic analysis revealed an increase in several species of sphingomyelin (SM), hexosylceramide (HexCer), and cholesteryl esters combined with a decrease in glycerophospholipids in the infarcted tissue. Our results validate FTIR indicators and several species of lipids as useful markers of left ventricular remodeling post-MI in humans.
很少有研究分析生物物理参数作为心肌梗死后心脏重构的标志物的潜力,特别是在人类心脏中。傅里叶变换红外光谱(FTIR)可以说明蛋白质、核酸和脂质在单个特征中的整体变化。本工作旨在确定心肌梗死后人类左心室重构的 FTIR 和脂质组学模式。共收集了 9 个缺血性心肌病患者的心脏样本。对右心室(RV)、左心室(LV)和梗死左心室(LV INF)的样本进行了生物物理(FTIR 和差示扫描量热法,DSC)和脂质组学(液相色谱-高分辨率质谱,LC-HRMS)研究。FTIR 表明,与同一患者的 RV 或 LV 相比,LV INF 的肌纤维、细胞外基质蛋白和水响应发生了深刻变化。LV INF 的脂质和酯化脂质 FTIR 带增强,并且这两个脂质指标与这些样本中的胶原蛋白、乳酸盐、多糖和糖原等重构标志物紧密正相关。脂质组学分析显示,梗死组织中几种鞘磷脂(SM)、己糖神经酰胺(HexCer)和胆固醇酯的含量增加,同时甘油磷脂的含量降低。我们的结果验证了 FTIR 指标和几种脂质作为人类心肌梗死后左心室重构的有用标志物。
Biomolecules. 2020-10-22
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