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Updated: Sep 27, 2025
Isolation of Human Primary Valve Cells for In vitro Disease Modeling
Published on: April 16, 2021
A disease-driver population within interstitial cells of human calcific aortic valves identified via single-cell and
Julius L Decano1, Yukio Iwamoto1, Shinji Goto1
1Cardiovascular Medicine, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Insights
Researchers identified a specific cell population driving calcific aortic valve disease (CAVD). This discovery offers new therapeutic targets for CAVD, a condition lacking effective animal models.
Area of Science:
- Cardiovascular Biology
- Cellular Biology
- Translational Medicine
Background:
- Calcific aortic valve disease (CAVD) pathogenesis is complex due to cellular heterogeneity in aortic valves.
- A lack of suitable animal models hinders mechanistic studies and therapeutic development for CAVD.
Purpose of the Study:
- To identify and characterize specific cell populations contributing to CAVD.
- To uncover key regulators and potential therapeutic targets for human CAVD.
Main Methods:
- Stepwise single-cell analysis to identify disease-driver populations (DDP) within valvular interstitial cells (VICs).
- Phenotype-guided omic profiling and network-based analysis to characterize DDPs.
- Temporal proteomic profiling and in vitro loss-of-function experiments to validate therapeutic targets.
Main Results:
- A distinct DDP within VICs was identified, characterized by the surface marker profile CD44highCD29+CD59+CD73+CD45low.
- These DDP-VICs exhibit multi-lineage differentiation and osteogenic properties, implicating them in valve calcification.
- MAOA and CTHRC1 were identified as potential therapeutic targets, with in vitro experiments confirming their role.
Conclusions:
- The identification of DDPs provides critical insights into CAVD mechanisms.
- MAOA and CTHRC1 represent promising therapeutic targets for treating CAVD.
- The stepwise analytical strategy is effective for discovering therapeutic targets in complex diseases.
Abstract:
Cellular heterogeneity of aortic valves complicates the mechanistic evaluation of the calcification processes in calcific aortic valve disease (CAVD), and animal disease models are lacking. In this study, we identify a disease-driver population (DDP) within valvular interstitial cells (VICs). Through stepwise single-cell analysis, phenotype-guided omic profiling, and network-based analysis, we characterize the DDP fingerprint as CD44highCD29+CD59+CD73+CD45low and discover potential key regulators of human CAVD. These DDP-VICs demonstrate multi-lineage differentiation and osteogenic properties. Temporal proteomic profiling of DDP-VICs identifies potential targets for therapy, including MAOA and CTHRC1. In vitro loss-of-function experiments confirm our targets. Such a stepwise strategy may be advantageous for therapeutic target discovery in other disease contexts.
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