title: The effect of Gu-Sui-Bu (Drynaria fortunei J. Sm) immobilized modified calcium hydrogenphosphate on bone cell activities.
abstract: In our previous study, we have validated the efficacy and the safety of Gu-Sui-Bu [Drynaria fortunei (Kunze) J. Sm.] by the bone cells culture. However, a satisfactory delivery system for Gu-Sui-Bu must be developed before it can be used in clinical medicine. In this study, we try to use modified calcium hydrogenphosphate (MCHP) bioceramic as a carrier to transport Gu-Sui-Bu into the bone cell culture system. Toward this goal, we evaluated the effect of a Gu-Sui-Bu-immobilized modified calcium hydrogenphosphate (GI-MCHP) on the bone cells activities. THE CHINESE MEDICINE: Gu-Sui-Bu [Drynaria fortunei (kunze) J. Sm] was extracted and then immobilized on the surface of MCHP. The rat osteoblasts-osteoclasts co-culture system was used as the experimental model. After the cells grew to 80% confluence, different sizes of GI-MCHP particles were tested. The mitochondria activity of the bone cells after exposure was determined by colorimetric assay. Biochemical markers such as lactate dehydrogenase (LDH), alkaline phosphatase (ALP), acid phosphatase (ACP) and prostaglandin E(2) titer were analyzed to evaluate the bone cells activities. Histomorphometric study of osteoclasts activities and the phenotype expression of osteoblasts were also evaluated. There is no detectable titer of LDH secretion into the medium and no significant change in the intracellular ALP content. The ALP titer in the culture medium did increase significantly at 3 days' culture, while there is a significant decrease in the intracellular ACP content and significant increase in the ACP titer in the medium. The concentrations of PGE(2) in tested medium are always significantly higher than that of control medium during the 7 days' culture. At the end of 7 days' culture, the PGE(2) concentrations in the tested medium were still 4.74 times that of the control medium. After GI-MCHP treatment on bone cells, the size of the osteoclasts seems decreased and their cell integrity seems lost, while the osteoblasts phenotype expression was relatively preserved. From this study, we demonstrated that Gu-Sui-Bu [Drynaria fortunei (Kunze) J. Sm.] immobilized MCHP has well preserved the potential beneficial effects of Gu-Sui-Bu on the bone cells culture.
authors.affiliation: Department of Orthopedic Surgery, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei, Taiwan, ROC.
authors.forename: Jui-Sheng
authors.initials: JS
authors.lastname: Sun
authors.forename: Guo-Chung
authors.initials: GC
authors.lastname: Dong
authors.forename: Chun-Yu
authors.initials: CY
authors.lastname: Lin
authors.forename: Shiow-Yunn
authors.initials: SY
authors.lastname: Sheu
authors.forename: Feng-Huei
authors.initials: FH
authors.lastname: Lin
authors.forename: Li-Ting
authors.initials: LT
authors.lastname: Chen
authors.forename: Walter Hong-Shong
authors.initials: WH
authors.lastname: Chang
authors.forename: Yng-Jiin
authors.initials: YJ
authors.lastname: Wang
mesh_terms: D000469:Alkaline Phosphatase / Q000032:analysis; D000818:Animals; D001483:Base Sequence; D002130:Calcium Phosphates / Q000494:pharmacology*; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D003124:Colorimetry; D003593:Cytoplasm / Q000201:enzymology; D017931:DNA Primers; D015232:Dinoprostone / Q000378:metabolism; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D029624:Ferns; D005786:Gene Expression Regulation / Q000187:drug effects; D007700:Kinetics; D007770:L-Lactate Dehydrogenase / Q000032:analysis; D008516:Medicine, Chinese Traditional; D010006:Osteoblasts / Q000166:cytology* / Q000187:drug effects / Q000502:physiology; D015675:Osteocalcin / Q000235:genetics; D010010:Osteoclasts / Q000166:cytology* / Q000187:drug effects / Q000502:physiology; D010936:Plant Extracts / Q000494:pharmacology*; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013499:Surface Properties; D013624:Taiwan; D013997:Time Factors
chemical_list: D002130:Calcium Phosphates; D017931:DNA Primers; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; C485828:alpha-tricalcium phosphate; C476230:gu-sui-bu; C485830:tetracalcium phosphate; D015675:Osteocalcin; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; D007770:L-Lactate Dehydrogenase; D000469:Alkaline Phosphatase; D015232:Dinoprostone; C485829:calcium phosphate, dibasic, anhydrous