The present invention relates to formulations, comprising SBF and collagen, and methods that form a bone-like coating on the surface of a substrate. These coated substrates can be used in cell culture experiments to investigate the bone remodelling process and to evaluate drugs for diseases related to bone remodelling, e.g. osteoporosis.

Provided is a method of preparing a hydrogel composition including a uniform content of calcium phosphate, wherein a hydrogel composition prepared by the method has a uniform content of calcium phosphate, and thus may be used to quantify phosphates contained in the hydrogel composition. Provided is an in-vitro 3D osteoporosis model including a calcium phosphate hydrogel composition, wherein osteoblasts and osteoclasts may be three-dimensionally co-cultured inside a biogel, such that the osteoporosis model may be fabricated according to an intended use or clinical stage. Further, the model contains a calcium phosphate hydrogel with a uniform content of phosphate and thus enables quantification of calcium phosphate through measurement of phosphates, and therefore, the model may be used to screen candidate compounds for an osteoporosis drug and may effectively predict therapeutic effects of the drug on osteoporosis.

A dissolvable foam scaffold for cell culture is provided herein. The dissolvable foam scaffold includes an ionotropically crosslinked polygalacturonic acid compound selected from at least one of: pectic acid; partially esterified pectic acid, partially amidated pectic acid and salts thereof, and at least one first water-soluble polymer having surface activity.

A bioactive filamentary structure includes a sheath coated with a mixture of synthetic bone graft particles and a polymer solution forming a scaffold structure. In forming such a structure, synthetic bone graft particles and a polymer solution are applied around a filamentary structure. A polymer is precipitated from the polymer solution such that the synthetic bone graft particles and the polymer coat the filamentary structure and the polymer is adhered to the synthetic bone graft particles to retain the graft particles.

Disclosed are compositions and methods for pluripotent stem cell culture. Compositions include mineral coated microparticles having a core and a mineral coating, wherein the mineral coating includes fibroblast growth factor. Also disclosed are methods for pluripotent stem cell culture methods using mineral coated microparticles including fibroblast growth factor.