Gianluca Polvani

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Saphenous vein graft disease is a timely problem in coronary artery bypass grafting. Indeed, after exposure of the vein to arterial blood flow, a progressive modification in the wall begins, due to proliferation of smooth muscle cells in the intima. As a consequence, the graft progressively occludes and this leads to recurrent ischemia. In the present study(More)
Epigenetics, through control of gene expression circuitries, plays important roles in various physiological processes such as stem cell differentiation and self renewal. This occurs during embryonic development, in different tissues, and in response to environmental stimuli. The language of epigenetic program is based on specific covalent modifications of(More)
Autologous saphenous veins are commonly used for the coronary artery bypass grafting even if they are liable to progressive patency reduction, known as ‘vein graft disease’. Although several cellular and molecular causes for vein graft disease have been identified using in vivo models, the metabolic cues induced by sudden interruption of vasa vasorum blood(More)
Increased oxidative stress in a failing heart may contribute to the pathogenesis of heart failure (HF). The aim of this study was to identify the oxidised proteins in the myocardium of HF patients and analyse the consequences of oxidation on protein function. The carbonylated proteins in left ventricular tissue from failing (n = 14) and non-failing human(More)
BACKGROUND The aim of this prospective study is to evaluate the role in the onset of surgical site infections of bilateral internal thoracic arteries harvesting in patients with decompensated preoperative glycemia. METHODS 81 consecutive patients with uncontrolled diabetes mellitus underwent elective CABG harvesting single or double internal thoracic(More)
The success of allotransplants is critically dependent on both tissue viability and efficient removal of potentially toxic cryopreservants. In this study we analysed the dimethyl sulphoxide (Me2SO) content of cardiovascular tissue samples stored in tissue banks and optimized a washing protocol to be used before surgical implant. We compared the Me2SO(More)
This erratum is to correct Fig. 3. The corrected version of Fig. 3 is presented here. Figure 3a shows the results of the open-loop experimental campaign, where theoretical and measured changes in O 2 concentration under various flow rate conditions are compared; while Figs. 3b and 3c report the results of the de-oxygenator validation in the closed loop(More)
We investigated the presence of antibiotics in cryopreserved cardiovascular tissues and cryopreservation media, after tissue decontamination with antibiotic cocktails, and the impact of antibiotic residues on standard tissue bank microbiological analyses. Sixteen cardiovascular tissues were decontaminated with bank-prepared cocktails and cryopreserved by(More)
BACKGROUND The pericardial tissue is commonly used to produce bio-prosthetic cardiac valves and patches in cardiac surgery. The procedures adopted to prepare this tissue consist in treatment with aldehydes, which do not prevent post-graft tissue calcification due to incomplete xeno-antigens removal. The adoption of fixative-free decellularization protocols(More)
BACKGROUND This study was undertaken to compare the in vitro effects of 17beta-estradiol on human epicardial coronary arteries, resistance coronary arteries and on arterial vessels usually employed as grafts in surgical myocardial revascularization. METHODS Coronary artery rings (descending coronary artery, right coronary artery, circumflex coronary(More)
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