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Yasuhiro Takeuchi,Junko Hashimoto,Yosuke Nishida,Chiemi Yamagiwa,Takashi Tamura,Akihide Atsumi 대한골다공증학회 2018 Osteoporosis and Sarcopenia Vol.4 No.1
Objectives: This postmarketing, observational study evaluated the safety and effectiveness of monthly intravenous (IV) ibandronate in Japanese patients with osteoporosis. Methods: Eligible patients received monthly IV ibandronate 1mg for 12 months. Adverse drug reactions (ADRs) were evaluated. Changes in bone mineral density (BMD) and bone turnover markers (BTMs) were assessed using matched t-test analysis. Cumulative fracture rates were analyzed by Kaplan-Meier methodology. Results: In total, 1062 patients were enrolled, of whom 1025 (n= 887 women, n= 138 men) were treated. Mean patient age was 77 years. Seventy-five ADRs were reported in 54 patients (5.26%). Four patients (0.39%) experienced serious ADRs, including one case of osteonecrosis of the jaw. Acute-phase reactions occurred in 21 patients (2.04%), and half of them arose after the first ibandronate injection. No new safety concerns were identified. Significant increases in BMD at 12 months relative to baseline were observed at the lumbar spine (4.84%, n= 187; 95% confidence interval [CI], 3.47%-6.21%), femoral neck (2.73%, n= 166; 95% CI, 1.46%-4.01%), and total hip (1.93%, n= 133; 95% CI, 0.80%-3.07%). Significant reductions were observed in all BTMs at 12 months (n = 174 in tartrate-resistant acid phosphatase-5b, n = 101 in procollagen type 1 N-terminal propeptide at baseline). The cumulative incidence of nontraumatic,new vertebral and nonvertebral fractures was 3.16% (95% CI, 2.12%-4.70%). Analyses in women only showed similar results to the overall population. Conclusions: These findings confirm the favorable safety and consistent effectiveness of ibandronate, and indicate that monthly IV ibandronate would be beneficial in daily practice for the treatment of Japanese patients with osteoporosis.
Yasuhiro Takeuchi,Junko Hashimoto,Hiroyuki Kakihata,Yousuke Nishida,Michiko Kumagai,Chiemi Yamagiwa 대한골다공증학회 2019 Osteoporosis and Sarcopenia Vol.5 No.1
Objectives: The favorable safety and consistent effectiveness of monthly intravenous (IV) ibandronate injections was demonstrated in a prospective, postmarketing, observational study in Japanese patients with osteoporosis. Here, we present subgroup analyses from the study. Methods: Lumbar spine (L2e4) bone mineral density (BMD) gains were assessed in the following subgroups: aged <75 or 75 years, absence or presence of vertebral fractures, previous bisphosphonate (BP) treatment, and concomitant versus naïve osteoporosis drug treatment. The cumulative incidence of fractures and relative change in bone turnover markers were also examined. Results: Of 1062 enrolled patients, 1025 received monthly IV ibandronate 1mg and were assessed for 12 months. BMD gains with ibandronate were comparable, irrespective of older age or prevalent fractures. Overall, 515 patients (50.2%) had previously received osteoporosis treatment; of these, 166 (16.1%) received other BPs. Mean BMD changes were 3.69% (95% confidence interval [CI], 0.89%e6.50%) in patients previously treated with other BPs, and 4.26% (95% CI, 2.88%e5.64%) in patients who had not received prior osteoporosis treatment. Among the 510 patients (49.7%) concomitantly prescribed active vitamin D drugs, mean BMD changes were 5.74% (95% CI, 2.53%e8.95%) with eldecalcitol versus 3.54% (95% CI, 1.98%e5.10%) with ibandronate alone. The lowest fracture incidence was observed with the combination of ibandronate and eldecalcitol, but differences between the subgroups were not statistically significant. Conclusions: Monthly IV ibandronate demonstrated comparable BMD gains in the patient subgroups analyzed. Concomitant use of ibandronate with eldecalcitol showed a trend of higher BMD gains and lower fracture incidence than ibandronate alone.
Kaori Shoji,Kaori Shoji,Masanobu Tsubaki,Yuzuru Yamazoe,Takao Satou,Tatsuki Itoh,Yasuhiro Kidera,Yoshihiro Tanimori,Masashi Yanae,Hideaki Matsuda,Atsushi Taga,Haruyuki Nakamura,Shozo Nishida 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.3
Mangiferin, 1,3,6,7-tetrahydroxyxanthone-C2-β-D-glucoside (C-glucosylxanthone), is a xanthone derivative that is widely distributed in higher plants. Recently, mangiferin was found to exhibit potential antitumor effects. However, the molecular mechanisms of this effect have not been elucidated. In the present study, we attempt to clarify the mechanism of mangiferininduced apoptosis in the human acute myeloid leukemia cell line HL-60; mangiferin was found to induce apoptosis. We also observed a concurrent increase in caspase-3 activity and DNA fragmentation. Furthermore, on examining the survival signals expressed during apoptotic induction, we observed that mangiferin caused a remarkable decrease in the nuclear entry of NF-κB p65. However, there were no changes in the expression of other survival signals,such as extracellular signal-regulated kinase 1/2, protein kinase B, and p38 mitogenactivated protein kinase. In addition, mangiferin suppressed the expressions of Bcl-xL and XIAP; however, we did not note any changes in the levels of Bcl-2, Bax, and Bim. These results indicate that mangiferin induces apoptosis by suppressing NF-κB activation and expressions of Bcl-xL and XAIP. These findings suggest that mangiferin may be useful as an anticancer agent and can be used in combination therapy with other anticancer drugs for the treatment of acute myeloid leukemia.