Advertisement

Topics

Modifying Decellularized Aortic Valve Scaffolds with Stromal Cell-derived Factor-1α Loaded Proteolytically Degradable Hydrogel for Recellularization and Remolding.

07:00 EST 2nd February 2019 | BioPortfolio

Summary of "Modifying Decellularized Aortic Valve Scaffolds with Stromal Cell-derived Factor-1α Loaded Proteolytically Degradable Hydrogel for Recellularization and Remolding."

Decellularized matrix is of great interest as a scaffold for the tissue engineering heart valves due to its naturally three-dimensional structure and bioactive composition. A primary challenge of tissue engineered heart valves based on decellularized matrix is to grow a physiologically appropriate cell population within the leaflet tissue. In this study, a composite scaffold was fabricated by the combination of a porous matrix metalloproteinase (MMP) degradable poly (ethylene glycol) (PEG) hydrogel that were loaded with stromal cell-derived factor-1α (SDF-1α) and a mechanically supportive decellularized porcine aortic valve. Results demonstrated that the modified scaffold enhanced bone marrow mesenchymal stem cells (BMSC) adhesion, viability and proliferation, and promoted BMSC differentiate into valve interstitial-like cells. Furthermore, these modifications lead to enhanced protection of the scaffold from thrombosis. In vivo assessment by rat subdermal model showed the modified scaffold was highly biocompatible with tissue remodeling characterized by promoting mesenchymal stem cells recruitment and facilitating M2 macrophage phenotype polarization. The surface layers of PEG hydrogel not only could provide a niche for cell migration, proliferation and differentiation, but also protect the scaffolds from rapid degeneration, inflammation and calcification. The intermediate layer of decellularized valve could maintain the organization of the scaffold and perform the valve function. The promising results emphasize the potential of our scaffolds to improve recellularization and promote remodeling of implanted decellularized valves. These findings suggest that the SDF-1α loaded MMP degradable PEG hydrogel modification could be an efficient approach to develop functional decellularized heart valve. STATEMENT OF
SIGNIFICANCE:
A composite scaffold was fabricated by the combination of a porous matrix metalloproteinase (MMP) degradable poly (ethylene glycol) (PEG) hydrogel that were loaded with SDF-1α and a mechanically supportive decellularized porcine aortic valve. The surface layers of PEG hydrogel not only could provide a niche for cell migration, proliferation and differentiation, but also protect the scaffolds from rapid degeneration, inflammation and calcification. The intermediate layer of decellularized valve could maintain the organization of the scaffold and perform the valve function. The promising results emphasize the ability of our scaffolds to improve recellularization and promote remodeling of implanted decellularized valves. This suggests that the extracellular matrix-based valve scaffolds have potential for clinical applications.

Affiliation

Journal Details

This article was published in the following journal.

Name: Acta biomaterialia
ISSN: 1878-7568
Pages:

Links

DeepDyve research library

PubMed Articles [18819 Associated PubMed Articles listed on BioPortfolio]

Surgical aortic valve replacement for valve-in-valve trans-catheter aortic valve dysfunction in the patient with a small aortic annulus.

Heart valve tissue-derived hydrogels: Preparation and characterization of mitral valve chordae, aortic valve, and mitral valve gels.

Heart valve (HV) diseases are among the leading causes of death and continue to threaten public health worldwide. The current clinical options for HV replacement include mechanical and biological pros...

Description of the aortic root anatomy in relation to transcatheter aortic valve implantation.

Transcatheter aortic valve implantation (TAVI) has emerged as a less invasive treatment than surgical aortic valve replacement in patients with aortic stenosis. Understanding the anatomy of aortic val...

Predicting the future of TAVR: an obituary to open aortic valve replacement?

Transcatheter aortic valve replacement (TAVR) has become the cornerstone for aortic valve intervention since the first implantation in 2002. Recent advances with novel devices and introduction into lo...

Valve-sparing aortic root replacement combined with bicuspidization for a quadricuspid aortic valve.

Quadricuspid aortic valves are rare congenital malformations. Although aortic valve replacement is the first-choice treatment in most cases, aortic valve repair using a tricuspidization procedure has ...

Clinical Trials [8772 Associated Clinical Trials listed on BioPortfolio]

Aortic Root Enlargement in Aortic Valve Replacement

Aortic valve disease is a progressive illness that varies from minor valve thickening lacking obstruction of blood stream to severe calcification and alteration of the valve leading to wea...

Minimally Invasive Aortic Valve Replacement Versus Conventional Aortic Valve Replacement. a Long Term Registry

The aim of the present study is to assess in a "real life" caselist the outcome of three different surgical approches for isolated aortic valve surgery in terms of surgery times, morbidity...

Transfemoral Replacement of Aortic Valve With HLT MeriDIAN Valve Feasibility Trial CANADA

To evaluate the safety and performance of the HLT System in patients with severe aortic stenosis who present at high risk for aortic valve replacement surgery.

Ascending Aortic Dilation in BiAV After TAVR

This study sought to evaluate changes in ascending aorta size after transcatheter aortic valve replacement (TAVR) in patients with bicuspid aortic valve (BiAV) compared with patients with ...

Clinical Investigation Of The Mitroflow Aortic Pericardial Heart Valve

This is a trial to demonstrate the safety and effectiveness of the Mitroflow Aortic Heart Valve when used to replace a diseased or dysfunctional aortic valve or aortic valve prosthesis.

Medical and Biotech [MESH] Definitions

The downward displacement of the cuspal or pointed end of the trileaflet AORTIC VALVE causing misalignment of the cusps. Severe valve distortion can cause leakage and allow the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to aortic regurgitation.

Surgical treatment for severe AORTIC VALVE STENOSIS. Transcatheter aortic valve replacement (TAVR) is used as an alternative option in patients who are deemed at high risk or inoperable for traditional open-heart surgery.

Pathological condition characterized by the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to regurgitation. It is caused by diseases of the AORTIC VALVE or its surrounding tissue (aortic root).

A type of constriction that is caused by the presence of a fibrous ring (discrete type) below the AORTIC VALVE, anywhere between the aortic valve and the MITRAL VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.

A pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topics

Cardiology
Cardiology is a specialty of internal medicine.  Cardiac electrophysiology : Study of the electrical properties and conduction diseases of the heart. Echocardiography : The use of ultrasound to study the mechanical function/physics of the h...

Cardiovascular disease (CVD)
Acute Coronary Syndromes (ACS) Blood Cardiovascular Dialysis Hypertension Stent Stroke Vascular Cardiovascular disease (CVD) includes all the diseases of the heart and circulation including coronary heart disease (angina...


Searches Linking to this Article