What question did this study set out to answer?

To elucidate the cellular and molecular mechanisms of bioprosthetic valve deterioration and identify strategies to prevent structural leaflet degeneration.

May 10, 2023JACC Basic to Translational ScienceOpen Access

Bioprosthetic Valve Deterioration

Q: What is the clinical evidence from this study?

Study design: Other. Population: Bioprosthetic Valve Deterioration. Intervention: Increasing collagen density and leaflet strength. Primary outcome: Prevention of infiltration of macrophages and circulating proteins.

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Key result

Increasing collagen density and leaflet strength in a goat model effectively prevented the infiltration of macrophages and circulating proteins associated with bioprosthetic valve deterioration.

Why the study?

Does increasing collagen density and leaflet strength prevent infiltration of macrophages and circulating proteins in bioprosthetic valves?

Population

Explanted bioprosthetic valves and a goat model with autologous pericardium-derived aortic valve replacement

Comparison

Preventing infiltration of macrophages and circulating proteins by increasing collagen density and leaflet strength

Design

Preclinical histologic, expression analysis, and animal experiment

Authors

TSTomohisa SakaueEhime University TKTadaaki KoyamaKansai Medical University YNYoshitsugu NakamuraChiba-Nishi General Hospital

Discussion

Member takes

Implication

Does not support changes to bioprosthetic valve design; leaves open translation of collagen strengthening to human durability.

Key Points

To elucidate the cellular and molecular mechanisms of bioprosthetic valve deterioration and identify strategies to prevent structural leaflet degeneration.
Performed histologic, gene expression, and protein expression analyses on explanted degenerated bioprosthetic valves.
Established a preclinical model using goats that received aortic valve replacement with autologous pericardium-derived valves to replicate clinical pathology.
Tested experimental interventions in goats targeting leaflet strength and collagen density to prevent inflammatory infiltration.
Explanted bioprosthetic valves displayed pronounced macrophage accumulation, a total absence of fibroblastic interstitial cells, and deep infiltration of fibrinogen and plasminogen into interstitial spaces.
Goat models receiving autologous pericardial aortic valve replacements completely reproduced the histological and molecular hallmarks observed in degenerated human valves.
Increasing collagen density and leaflet strength effectively blocked the infiltration of circulating proteins and macrophages, preventing valve deterioration.

Structured PICO

Does increasing collagen density and leaflet strength prevent infiltration of macrophages and circulating proteins in bioprosthetic valves?

Population

Explanted bioprosthetic valves and a goat model with autologous pericardium-derived aortic valve replacement

Intervention

Increasing collagen density and leaflet strength

Outcome

Prevention of macrophage and circulating protein infiltration (bioprosthetic valve deterioration)surrogate

Increasing collagen density and leaflet strength in bioprosthetic valves prevents macrophage infiltration and structural deterioration in a preclinical goat model.

Cite This Study

Sakaue et al. (2023) studied Bioprosthetic Valve Deterioration. Increasing collagen density and leaflet strength was evaluated on Prevention of infiltration of macrophages and circulating proteins. Increasing collagen density and leaflet strength in a goat model effectively prevented the infiltration of macrophages and circulating proteins associated with bioprosthetic valve deterioration.

synapsesocial.com/papers/6a971289dbc641e6a0a6f4bf https://doi.org/10.1016/j.jacbts.2023.01.003

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Bioprosthetic Valve Deterioration

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Bioprosthetic Valve Deterioration

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider