Bioceramics-enhanced patch activates epicardial epithelial-to-mesenchymal transition via Notch pathway for cardiac repair.

Engineered cardiac patches (ECPs) introduced functional factors that offer a promising strategy for the treatment of myocardial infarction (MI). Silicate bioceramics have received widespread attention because of their great potential in the tissue repair field. Inspired by the biological functions of inorganic ions on the cardiovascular system, we prepared an ECP containing lithium magnesium silicon bioceramics (LMS) particles.

A functional cardiac patch promotes cardiac repair by modulating the CCR2 cardiac-resident macrophage niche and their cell crosstalk.

C-C chemokine receptor type 2 (CCR2) cardiac-resident macrophages (CCR2 cRMs) are known to promote cardiac repair after myocardial infarction (MI). However, the substantial depletion and slow recovery of CCR2 cRMs pose significant barriers in cardiac recovery. Here, we construct a functional conductive cardiac patch (CCP) that can provide exogenously elastic conductive microenvironment and induce endogenously reparative microenvironment mediated by CCR2 cRMs for MI repair.

A cigarette filter-derived biomimetic cardiac niche for myocardial infarction repair.

Cell implantation offers an appealing avenue for heart repair after myocardial infarction (MI). Nevertheless, the implanted cells are subjected to the aberrant myocardial niche, which inhibits cell survival and maturation, posing significant challenges to the ultimate therapeutic outcome. The functional cardiac patches (CPs) have been proved to construct an elastic conductive, antioxidative, and angiogenic microenvironment for rectifying the aberrant microenvironment of the infarcted myocardium.

Flexible Conductive Decellularized Fish Skin Matrix as a Functional Scaffold for Myocardial Infarction Repair.

Engineering cardiac patches are proven to be effective in myocardial infarction (MI) repair, but it is still a tricky problem in tissue engineering to construct a scaffold with good biocompatibility, suitable mechanical properties, and solid structure. Herein, decellularized fish skin matrix is utilized with good biocompatibility to prepare a flexible conductive cardiac patch through polymerization of polydopamine (PDA) and polypyrrole (PPy). Compared with single modification, the double modification strategy facilitated the efficiency of pyrrole polymerization, so that the patch conductivity is improved.

Elastic and Conductive Melanin/Poly(Vinyl Alcohol) Composite Hydrogel for Enhancing Repair Effect on Myocardial Infarction.

Heart failure caused by acute myocardial infarction (MI) still remains the main cause of death worldwide. Development of conductive hydrogels provided a promising approach for the treatment of myocardial infarction. However, the therapeutic potential of these hydrogels is still limited by material toxicity or low conductivity.