3D-Printed Biomimetic Vascular Scaffold Crosslinked with Heparan Sulfate for Sustained Release of PDGFB-LG4 Fusion Protein Promotes Bone Regeneration.

A central focus of bone tissue engineering is the construction of vascular systems, which provide nutrients for cell survival, remove metabolic waste, and accelerate tissue regeneration. Platelet-derived growth factor-BB (PDGFB) has the ability to stimulate both vascularization and bone regeneration; however, its clinical application has been hindered by side effects and low efficacy due to suboptimal delivery systems. In this study, a biomimetic vascular scaffold crosslinked with heparan sulfate (HS) is developed to enable sustained delivery of the PDGFB-LG4 fusion protein, targeting the regeneration of critically sized bone defects.

Discovery of Novel 5-(Pyridazin-3-yl)pyrimidine-2,4(1,3)-dione Derivatives as Potent and Orally Bioavailable Inhibitors Targeting Ecto-5'-nucleotidase.

Ecto-5-nucleotidase (CD73) is overexpressed in a variety of cancers and associated with the immunosuppressive tumor microenvironment, making it an attractive target for cancer immunotherapy. Herein, we designed and synthesized a series of novel (pyridazine-3-yl)pyrimidine-2,4(1,3)-dione derivatives as CD73 inhibitors. These compounds exhibited remarkable inhibitory activity against CD73 in both enzymatic biochemical and cellular assays.

Efficient Biosynthesis of Natural Yellow Pigments by Monascus purpureus in a Novel Integrated Fermentation System.

Because of the increasing demand for healthy and safe food, Monascus spp. have gained much attention as a sustainable source of natural food colorant. In this study, a novel integrated fermentation system consisting of surfactant and in situ extractant was established for efficiently producing yellow pigments by M.