Screening analysis of proteolytic enzymes and their inhibitors in the leaflets of epoxy-treated bioprosthetic heart valves explanted due to dysfunction

   
Kostyunin A.E.1 , Glushkova T.V.1, Shishkova D.K.1, Markova V.E.1, Ovcharenko E.A.1

1. Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russia
Section: Clinical and Diagnostic Research
DOI: 10.18097/PBMC20226801068      PubMed Id: 35221298
Year: 2022  Volume: 68  Issue: 1  Pages: 68-75
Bioprosthetic heart valves (BHVs) are known for their lower thrombogenicity rates and excellent hemodynamic parameters similar to native valves. However, the lifespan of these medical devices is limited to 15 years due to the structural valve degeneration. One of the mechanisms underlying functional impairment and calcification of BHVs includes proteolytic degradation of biomaterials. However, proteases found in xenogeneic BHVs tissue remain poorly studied. In this study using the dot blot assay, we have performed a screening analysis of proteolytic enzymes and their inhibitors in the leaflets of five BHVs explanted due to their dysfunction. Five aortic valves (AVs) explanted due to calcific aortic valve disease were studied as a comparison group. The results of the study have demonstrated that at least 17 proteases and 19 of their inhibitors can be found in BHVs. In the AVs 20 proteases and 21 their inhibitors were identified. Small quantitative differences were noted between proteomic profiles of the BHVs and AVs. Matrix metalloproteinases (MMPs) were expressed in BHVs and AVs at comparable levels, but the level of tissue inhibitors of metalloproteinases-1/-2 and RECK protein in implant tissues was lower than in natural valves. Probably, excessive activity of MMPs cannot be counterbalanced by their inhibitors in BHVs and therefore MMPs can degrade prosthetic biomaterial. Moreover, the detection of a wide range of proteolytic enzymes and their inhibitors in the degenerated BHVs suggests the existence of several pathophysiological pathways that can lead to structural valve degeneration.
Download PDF:  
Keywords: bioprosthetic heart valves, structural valve degeneration, proteolysis, proteolytic enzymes, enzyme inhibitors, dot blot assay
Citation:

Kostyunin, A. E., Glushkova, T. V., Shishkova, D. K., Markova, V. E., Ovcharenko, E. A. (2022). Screening analysis of proteolytic enzymes and their inhibitors in the leaflets of epoxy-treated bioprosthetic heart valves explanted due to dysfunction. Biomeditsinskaya Khimiya, 68(1), 68-75.
This paper is also available as the English translation: 10.1134/S1990750822030076
References  
 2024 (vol 70)
 2023 (vol 69)
 2022 (vol 68)
 2021 (vol 67)
 2020 (vol 66)
 2019 (vol 65)
 2018 (vol 64)
 2017 (vol 63)
 2016 (vol 62)
 2015 (vol 61)
 2014 (vol 60)
 2013 (vol 59)
 2012 (vol 58)
 2011 (vol 57)
 2010 (vol 56)
 2009 (vol 55)
 2008 (vol 54)
 2007 (vol 53)
 2006 (vol 52)
 2005 (vol 51)
 2004 (vol 50)
 2003 (vol 49)