Molecular differences between arterial and venous grafts in the first year after coronary artery bypass grafting

Steger CM, Hartmann A, Rieker R (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Histochemistry and Cell Biology

DOI: 10.1007/s00418-020-01896-4

Abstract

Despite commonly used for coronary artery bypass surgery, saphenous vein (SV) grafts have significantly lower patency rates in comparison to internal thoracic artery (ITA) grafts, which might be due to the structural characteristics of the vessel wall but also due to differences in oxidative stress adaptation and molecular signaling and regulation. This human post mortem study included a total of 150 human bypass grafts (75 SV grafts and 75 ITA grafts) obtained from 60 patients divided into five groups due to the time period of implantation: group 1: baseline group without grafting; group 2: 1 day; group 3: > 1 day–1 week; group 4: > 1 week–1 month; group 5: > 1 month–1 year. Pieces of 3 mm length were fixed with formaldehyde, dehydrated, wax embedded, cut into sections of 3 µm thickness, and histologically and immunohistochemically examined. Over the whole time period, we observed a lower neointima formation and a better preserved media in ITA grafts with a higher percentage of TNF-α, PDGFR-α, and VEGF-A in nearly all vessel wall layers, a higher amount of MMP-7, MMP-9, EGFR, and bFGF positive cells in SV grafts and a timely different peak not only between ITA and SV grafts but also within the various vessel wall layers of both graft types. Since most of the examined growth factors, growth factor receptors and cytokines are regulated by MAPKs, our results suggest an activation of different pathways in both vessel graft types immediately after bypass grafting.

Authors with CRIS profile

Arndt Hartmann Lehrstuhl für Allgemeine Pathologie und Pathologische Anatomie Ralf Rieker Institute of Pathology

Involved external institutions

Medizinische Universität Innsbruck AT Austria (AT)

How to cite

APA:

Steger, C.M., Hartmann, A., & Rieker, R. (2020). Molecular differences between arterial and venous grafts in the first year after coronary artery bypass grafting. Histochemistry and Cell Biology. https://doi.org/10.1007/s00418-020-01896-4

MLA:

Steger, Christina Maria, Arndt Hartmann, and Ralf Rieker. "Molecular differences between arterial and venous grafts in the first year after coronary artery bypass grafting." Histochemistry and Cell Biology (2020).

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