Senolytic cocktail dasatinib and quercetin attenuates chronic high altitude hypoxia associated bone loss in mice.

Chronic high-altitude hypoxia (CHH) induces irreversible abnormalities in various organisms. Emerging evidence indicates that CHH markedly suppresses bone mass and bone strength. Targeting senescent cells and the consequent senescence-associated secretory phenotype (SASP) with senolytics is a recently developed novel therapy for multiple age-related diseases.

Oxygen vacancy-enhanced catalytic activity of hyaluronic acid covered-biomineralization nanozyme for reactive oxygen species-augmented antitumor therapy.

Insufficient hydrogen peroxide content in tumor cells, unsuitable pH and low efficiency of commonly used metal catalysts severely affect the efficiency of chemodynamic therapy, resulting in unsatisfactory efficacy of chemodynamic therapy alone. For this purpose, we designed a composite nanoplatform capable of targeting tumors and selectively degrading in the tumor microenvironment (TME) to address these issues. In this work, we synthesized Au@CoO nanozyme inspired by crystal defect engineering.

Octahedral Pt-MOF with Au deposition for plasmonic effect and Schottky junction enhanced hydrogenothermal therapy of rheumatoid arthritis.

Hydrogen (H) therapy is a novel and rapidly developing strategy utilized to treat inflammatory diseases. However, the therapeutic efficacy of H is largely limited with on-target off-synovium toxic effect, nonpolarity and low solubility. Herein, an intelligent H nanogenerator based upon the metal-organic framework (MOF) loaded with polydopamine and Perovskite quantum dots is constructed for the actualization of hydrogenothermal therapy.

Bioactive Three-Dimensional Graphene Oxide Foam/Polydimethylsiloxane/Zinc Silicate Scaffolds with Enhanced Osteoinductivity for Bone Regeneration.

Nanocomposite scaffold materials have shown great prospect in promoting bone integration and bone regeneration. A three-dimensional graphene oxide foam/polydimethylsiloxane/zinc silicate (GF/PDMS/ZS) scaffold for bone tissue engineering was synthesized via dip coating and hydrothermal synthesis processes, resulting in the interconnected macroporous structure. The scaffold was characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and thermogravimetric (TG) analysis.

Three-Dimensional High-Porosity Chitosan/Honeycomb Porous Carbon/Hydroxyapatite Scaffold with Enhanced Osteoinductivity for Bone Regeneration.

Three-dimensional honeycomb porous carbon (HPC) has attracted increasing attention in bioengineering due to excellent mechanical properties and a high surface-to-volume ratio. In this paper, a three-dimensional chitosan (CS)/honeycomb porous carbon/hydroxyapatite composite was prepared by nano-sized hydroxyapatite (nHA) on the HPC surface in situ deposition, dissolved in chitosan solution, and vacuum freeze-dried. The structure and composition of CS/HPC/nHA were characterized by scanning electron microscopy, transmission electron miscroscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy, and the porosity, swelling ratio, and mechanical properties of the scaffold were also tested.

Treatment with soluble bone morphogenetic protein type 1A receptor fusion protein alleviates irradiation-induced bone loss in mice through increased bone formation and reduced bone resorption.

An increased fracture risk is often observed in cancer patients undergoing radiotherapy (RT), particularly at sites within the field of radiation. Therefore, the development of appropriate therapeutic options to prevent RT-induced bone loss is urgently needed. A soluble form of the BMP receptor type 1A fusion protein (mBMPR1A-mFc) serves as an antagonist to endogenous BMPR1A.

PRP-chitosan thermoresponsive hydrogel combined with black phosphorus nanosheets as injectable biomaterial for biotherapy and phototherapy treatment of rheumatoid arthritis.

Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease causing destruction of bone and cartilago articularis. Traditional treatment methods have many side effects, or too concerne about the anti-inflammatory mechanisms but ignore osteanagenesis. In this work, a novel therapeutic platform combined black phosphorus nanosheets (BPNs) into platelet-rich plasma (PRP)-chitosan thermoresponsive hydrogel has been prepared for management of RA.

Three-Dimensionally N-Doped Graphene-Hydroxyapatite/Agarose as an Osteoinductive Scaffold for Enhancing Bone Regeneration.

Composite biomaterials with hierarchical structures have emerged as new approaches for bone-tissue engineering. In this study, a biomimetic, osteoconductive tricomposite scaffold made of N-doped graphene-hydroxyapatite (NG-HA) hybrids blended with an agarose (AG) matrix was prepared via a facile hydrothermal/cross-linking/freeze-drying method. The structure and composition of AG/NG-HA were examined by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, Fourier transform infrared, Raman spectroscopy, and thermogravimetric analysis.