Publications by authors named "Tuomas Peltonen"

Background: Type 2 diabetes (T2D) and its complications cause a significant public health and economic challenge. To enable the optimal resource allocation across different prevention and treatment policies for the management of T2D-related complications, detailed cost estimates related to the complications of T2D are needed. Therefore, the objective of the study was to provide reliable and sufficiently detailed real-world estimates of costs associated with different T2D complications in a Finnish university hospital setting.

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Background: Calcific aortic valve disease (CAVD) is an atheroinflammatory process; finally it leads to progressive calcification of the valve. There is no effective pharmacological treatment for CAVD and many of the underlying molecular mechanisms remain unknown. We conducted a proteomic study to reveal novel factors associated with CAVD.

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Background And Aim Of The Study: Calcific aortic valve disease (CAVD) is a progressive disease starting from mild valvular sclerosis and progressing to severe aortic stenosis (AS) with calcified valves. The origin of the calcification is proposed to be mesenchymal cells which have differentiated towards an osteoblastic phenotype. Podoplanin is a glycoprotein expressed in the endothelium of lymphatic vessels and in osteoblasts and osteocytes, mesenchymal cells, as well as in many carcinomas and aortic atherosclerotic lesions.

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Calcific aortic valve disease (CAVD) represents a spectrum of disease spanning from milder degrees of calcification of valve leaflets, i.e., aortic sclerosis, to severe calcification i.

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Background And Aim Of The Study: Calcified aortic valve disease (CAVD) is an actively regulated disease that shares pathophysiological hallmarks with atherosclerosis. One of these common features is extracellular matrix (ECM) remodeling, which consists of a dynamic degradation and deposition of the ECM composition. Granzymes (Grs) are ECM- degrading and pro-apoptotic proteases that have been detected in atherosclerotic lesions, but their role in CAVD remains unknown.

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Calcific aortic valve disease (CAVD) is a progressive pathological condition with no effective pharmacological therapy. To identify novel molecular pathways as potential targets for pharmacotherapy, we studied microRNA (miRNA) profiles of heavily stenotic aortic valves (AS). One of the most upregulated miRNAs in AS valves compared to control valves was miR-125b (1.

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Background And Aim Of The Study: Aortic valve stenosis (AS) is an actively regulated pathobiological process which has an inflammation origin, and manifests as an accumulation of lipids and, ultimately, calcification of the aortic valve tissue. Increased plasma levels of the proinflammatory factor endothelin-1 (ET-1) have been reported in AS. Moreover, increased tissue levels of ET-1 and its ET(A) receptor, which mediates the fibrotic and proliferative effects of ET-1, have been reported in stenotic aortic valves.

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Aims: Aortic valve calcification is an actively regulated process with endothelial dysfunction displaying hallmarks of atherosclerosis. C-type natriuretic peptide (CNP) system has been reported to have a role in the pathogenesis of vascular atherosclerosis and to be distinctly downregulated in aortic valve stenosis (AS). Here we studied gene expressions of CNP and is target receptor natriuretic peptide receptor type B (NPR-B) in human aortic valves.

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Background: Active involvement of extracellular matrix (ECM) and its composition regulating factors may have a central role in the pathogenesis of calcific aortic valve disease (CAVD). Thrombospondins (TSPs) are highly conserved matricellular proteins regulating inflammation, angiogenesis and ECM remodeling. These processes are strongly associated with progression of aortic valve stenosis (AS).

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Background: There is increasing evidence that renin-angiotensin system (RAS) may play a major role in the actively regulated fibrocalcific process in aortic valve stenosis (AS), but the gene expression or function of (pro)renin receptor ((P)RR), prorenin and renin or angiotensin converting enzyme 2(ACE2)/angiotensin-(1-7)/Mas receptor axis in calcific aortic valve disease is not known.

Methods And Results: We characterized expression of (P)RR, ACE2 and Mas receptor as well as renin, prorenin and angiotensin II type 2 (AT(2)) receptors in human aortic valves, and compared normal control valves (n = 11) with valves obtained from patients with aortic regurgitation (AR, n = 14), AR with fibrosis (n = 20) and AS (n = 61). By immunohistochemistry (P)RR positive staining was seen in the valvular endothelial cells of control and in the neovessels of stenotic valves.

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Background And Aim Of The Study: Aortic valve stenosis (AS) is an actively regulated pathobiological process that shows some hallmarks of atherosclerosis. Apelin and its receptor, APJ, are highly expressed in the heart, and the proposed effects of the apelin-APJ system are opposite to those of the angiotensin II-AT1-receptor pathway. The role of the apelin-APJ signaling pathway in calcified aortic valve disease is unknown.

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Aims: Aortic valve stenosis (AS) is an actively regulated process like atherosclerosis, which is accompanied by changes e.g. in endothelin-related genes.

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Background: Aortic valve calcification is an actively regulated process that displays hallmarks of atherosclerosis. Natriuretic peptides (A-, B-, and C-type natriuretic peptides [ANP, BNP, and CNP]) have been reported to have a role in the pathogenesis of vascular atherosclerosis, but their expression in aortic valves is not known. Here, we characterized and compared expression of natriuretic peptide system in aortic valves of patients with normal valves (n=4), aortic regurgitation (n=11), regurgitation and fibrosis (n=6), and aortic valve stenosis (n=21).

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