Related Experiment Video
Updated: Nov 7, 2025
Isolation of Human Primary Valve Cells for In vitro Disease Modeling
Published on: April 16, 2021
Isolation of Human Primary Valve Cells for In vitro Disease Modeling
Rolando A Cuevas1, Claire C Chu1, William J Moorhead1
1Division of Cardiology, Department of Medicine, and the Pittsburgh Heart, Lung, and Blood Vascular Medicine Institute, University of Pittsburgh.
Insights
Researchers developed a new method to create patient-specific cell lines for studying calcific aortic valve disease (CAVD). This advance enables better in vitro modeling of CAVD, aiding drug discovery for aortic stenosis.
Area of Science:
- Cardiovascular Biology
- Cell Biology
- Biomedical Engineering
Background:
- Calcific aortic valve disease (CAVD) affects a significant portion of the elderly population, leading to aortic stenosis, heart failure, and stroke.
- The exact triggers for the osteogenic transition of healthy valve cells in CAVD remain unclear.
- Current treatments for aortic stenosis involve high-risk, costly valve replacement surgeries (SAVR, TAVR).
Purpose of the Study:
- To establish a reliable workflow for generating patient-specific valvular cell lines for in vitro modeling of CAVD.
- To identify novel therapeutic targets for drug discovery to treat CAVD and aortic stenosis.
- To validate a method for preserving cell viability during tissue procurement.
Main Methods:
- Utilized surgically removed patient tissues and donor cadaver tissues to establish primary valvular cell lines.
- Implemented a cold storage solution, typically used in organ transplantation, to maintain cell viability during extended tissue procurement.
- Cultured isolated valve cells to assess their proliferative capacity and maintain endothelial and interstitial phenotypes.
Main Results:
- Successfully established patient-specific primary lines of valvular endothelial and interstitial cells.
- Demonstrated that isolated valve cells retain their proliferative capacity and cellular phenotypes for several days post-excision.
- Validated the use of cold storage to preserve cell integrity from tissue excision to laboratory processing.
Conclusions:
- The developed workflow provides a robust platform for in vitro modeling of CAVD using patient-specific cells.
- This approach facilitates the study of disease mechanisms and the identification of new therapeutic targets for aortic stenosis.
- The cold storage technique effectively preserves the viability of valvular cells, enabling reliable cell line establishment.
Abstract:
Calcific aortic valve disease (CAVD) is present in nearly a third of the elderly population. Thickening, stiffening, and calcification of the aortic valve causes aortic stenosis and contributes to heart failure and stroke. Disease pathogenesis is multifactorial, and stresses such as inflammation, extracellular matrix remodeling, turbulent flow, and mechanical stress and strain contribute to the osteogenic differentiation of valve endothelial and valve interstitial cells. However, the precise initiating factors that drive the osteogenic transition of a healthy cell into a calcifying cell are not fully defined. Further, the only current therapy for CAVD-induced aortic stenosis is aortic valve replacement, whereby the native valve is removed (surgical aortic valve replacement, SAVR) or a fully collapsible replacement valve is inserted via a catheter (transcatheter aortic valve replacement, TAVR). These surgical procedures come at a high cost and with serious risks; thus, identifying novel therapeutic targets for drug discovery is imperative. To that end, the present study develops a workflow where surgically removed tissues from patients and donor cadaver tissues are used to create patient-specific primary lines of valvular cells for in vitro disease modeling. This protocol introduces the utilization of a cold storage solution, commonly utilized in organ transplant, to reduce the damage caused by the often-lengthy procurement time between tissue excision and laboratory processing with the benefit of greatly stabilizing cells of the excised tissue. The results of the present study demonstrate that isolated valve cells retain their proliferative capacity and endothelial and interstitial phenotypes in culture upwards of several days after valve removal from the donor. Using these materials allows for the collection of control and CAVD cells, from which both control and disease cell lines are established.
