COMPOSITION FOR TREATING BONE LOSS
    3.
    发明公开

    公开(公告)号:US20240293448A1

    公开(公告)日:2024-09-05

    申请号:US18116820

    申请日:2023-03-02

    摘要: The composition for treating bone loss is a solution of silver nanoparticles in an ethanolic extract of Leptadenia plant leaves. The composition is prepared by extracting dried Leptadenia plant leaf powder in ethanol for 24 hours at room temperature with constant stirring. A sample of the extract is fractionated by column chromatography, and the fractions are tested to determine the most effective fraction for stimulating osteoblast formation from bone marrow-derived mesenchymal stem cells (BMSCs). This fraction is used to synthesize green silver nanoparticles by adding the extract fraction to a solution of silver nitrate with constant stirring for 24 hours at room temperature. A portion of the Leptadenia extract is added to the resulting silver nanoparticles to stimulate osteoblast formation in cultures of BMSCs. The composition may be used to form drug compositions for treating bone loss.

    PTH mimetic peptide based on protein domain reconstruction and application thereof

    公开(公告)号:US11912752B2

    公开(公告)日:2024-02-27

    申请号:US17243589

    申请日:2021-04-29

    申请人: Dehong Yang

    发明人: Dehong Yang

    摘要: A novel PTH(1-34) mimetic peptide based on protein domain reconstruction. The mimetic peptide contains peptide fragment repeats at 29th-34th positions. The amino acid at the 34th position and the last amino acid of the peptide fragment repeats at the 29th-34th positions are changed from phenylalanine (Phe, F) into tyrosine (Tyr, Y), so that MY-3 peptide is formed. Preclinical experiments show that the MY-3 mimetic peptide promotes osteoblast differentiation and has a very good effect in treating osteoporosis and promoting bone growth. The anti-osteoporosis effect of the MY-3 mimetic peptide is better than that of the PTH (1-34) (The product name on the market is Forsteo or Parathyroid), so that the MY-3 mimetic peptide has a significant clinical application prospect.