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Protection of the endothelial glycocalyx in vascular allografts via the enzymatic ligation of immunosuppressive glycopolymers prevents allograft rejection after transplantation in the absence of systemic immunosuppression.
Cellular signalling networks in the microenvironment of implanted biomaterial scaffolds can be computationally reconstructed from single-cell RNA-sequencing data of cells collected from the implantation site.
A hydrogel implanted into the cavity of a resected tumour and releasing CAR-T cells and platelets conjugated with a checkpoint inhibitor inhibits local tumour recurrence and the growth of distant tumours in mice.
A retrievable, porous and anti-fibrotic macrodevice for the encapsulation of cells provides long-term protection to human cells expressing therapeutic proteins after device implantation in the intraperitoneal space of immunocompetent mice.
A macroporous material encapsulating an immune-cell-activating cytokine, an adjuvant and tumour-associated antigens elicits prophylactic immunity to acute myeloid leukaemia in mice, and eradicates the disease when combined with chemotherapy.
Micropatterned nitinol (a nickel titanium alloy) thin films loaded with human CAR-T cells and implanted into tumours foster the expansion of the cells and extend animal survival in mouse models of human tumours.
Functionalized multi-walled carbon nanotubes twisted into helical fibre bundles that mimic the hierarchical structure of muscle can be used for the long-term monitoring of multiple disease biomarkers in vivo.
Bioresorbable photonic devices for the spectroscopic characterization of tissues and biofluids can continuously monitor cerebral temperature, oxygenation and neural activity in the brains of freely moving mice before they are fully resorbed.
A thermogelling polymer that acts as an internal tamponade can repair detached retinas and trigger the formation of a vitreous-like body, as shown in retinal-detachment rabbit and non-human-primate models.
A viscoelastic adhesive patch that accommodates the myocardium’s cyclic deformation outperforms most existing acellular epicardial patches in reversing left ventricular remodelling and in restoring heart function after myocardial infarction in rats.
Hydrogels incorporating human stromal cells and that after implantation in mice recruit cells from an orthotopic human tumour xenograft enable, after the injection of human immune cells, the study of the evolution of pre-metastatic niches.
Transplantation of pancreatic islet cells encapsulated in alginate microspheres into the omental bursa of the peritoneal cavity of NHPs significantly reduces FBRs and extends the longevity of the cells.
An implantable, wirelessly powered optoelectronic device that adheres to tissue for the delivery of low-dose, long-term photodynamic therapy leads to significant antitumour effects in mice with intradermally transplanted tumours.
The slow release of pro-survival peptide analogues crosslinked to an injectable collagen–dendrimer biomaterial significantly prolongs the engraftment and survival of transplanted stem cells in mouse models of ischaemic injury.
A patient-specific soft cardiovascular occluder made via three-dimensional printing and static moulding of an inflatable polymer balloon on the basis of data derived from computed tomography scans of a large animal is implanted in the same animal.
An implantable device consisting of a biodegradable core and a tubular braided sleeve autonomously elongates to accommodate tissue growth, as shown with prototypes implanted on a rat tibial bone and a piglet heart valve.
3D-printed grafts with geometrically designed and endothelialized vasculature rescue the perfusion of distal tissues in rodent models of hind limb ischaemia and myocardial infarction, preventing capillary loss, muscle atrophy and loss of function.
A comparison of the in vivo engraftment of scaffolds containing either an unassembled suspension of human vascular cells or an assembled network of them shows that non-inflammatory host neutrophils are indispensable mediators of vascularization.
In a rabbit model of prosthetic joint infection, optimization of the shape and loading of antibiotic clusters in a polymer implant augments and prolongs antibiotic elution while maintaining implant strength and wear rate.
An optimized formulation of glucagon-like peptide-1 recombinantly fused to an elastin-like polypeptide leads to zero-order release kinetics from a subcutaneous depot and to 10 days of glycaemic control in three mouse models of diabetes.
This Review discusses advances in implantable biomaterials that mimic the pre-metastatic niche and regulate the behaviour of tumour cells at the implant site, and their prospects for the detection of metastasis and for therapeutic interventions.
A hydrogel made of crosslinked clusters of highly branched polymers that has ultralow swelling pressure and that forms in 10 minutes despite its low polymer content functions as an artificial vitreous body for over one year without inducing adverse effects.
A viscoelastic adhesive cardiac patch with optimal mechanical behaviour, determined using a computational model, restores heart function and slows down pathological remodelling following myocardial infarction in rodents.
Occluders for the left atrial appendage that are patient-specific, thus ensuring better fitting and potentially less complications, can be made by 3D-printing inflatable polymer devices on the basis of data derived from computed tomography scans.