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- 저자 : Wing-Yin Li (검색결과 4 건)
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Li Moses Man-Lung,Kwok Jojo Yan-Yan,Chung Kwong-Yin,Cheung Kin-Wing,Chiu Kwok-Hing,Chau Wai-Wang,Ho Kevin Ki Wai 대한슬관절학회 2020 대한슬관절학회지 Vol.32 No.-
Total knee arthroplasty (TKA) is associated with significant perioperative blood loss and postoperative allogenic blood transfusion. Tranexamic acid (TXA) reversibly blocks lysine binding sites on plasminogen molecules and inhibits plasmin formation. Comparisons of the efficacy and safety of intra-articular and intravenous TXA in primary TKA have not previously been reported.A prospective randomized trial was conducted in 150 patients who underwent TKA, and these patients were randomized into three groups. Patients in Group A were injected by intra-articular TXA according to body weight (20 mg/kg). Patients in Group B received a standard dose of intra-articular TXA (2000 mg), and those in Group C were infused with TXA according to body weight (20 mg/kg) before tourniquet deflation and again 3 h later. Baseline characteristics and data collected at blood transfusion were compared. Differences among four time points (baseline, day 0, day 2, and day 5) were carried out using ANOVA. The hemoglobin levels at postoperative day 5 were 10.6 g/dL for Group A, 10.6 g/dL for Group B, and 10.7 g/dL for Group C. The drain output was 399 ml for Group A, 314 ml for Group B, and 305 ml for Group C ( p = 0.03). Group C had significantly less drain output than Group A after post hoc comparisons ( p = 0.05), whereas no significant difference was observed between Group A and B ( p = 0.09) or between Group B and C. The weight-adjusted dose of TXA administered intravenously significantly reduced the drain output but not the total blood loss when compared with the weight-adjusted dose of TXA administered intra-articularly. No significant difference was observed in the other parameters among the three groups. The Joint CUHK-NTEC CREC, CRE-2013.644-T . Registered 1 March 2014.
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Quan-Gui Gao,Li-Ping Zhou,Vien Hoi-Yi Lee,Hoi-Yi Chan,Cornelia Wing-Yin Man,Man-Sau Wong 고려인삼학회 2019 Journal of Ginseng Research Vol.43 No.4
Background: Ginsenoside Rg1 was shown to exert ligand-independent activation of estrogen receptor(ER) via mitogen-activated protein kinaseemediated pathway. Our study aimed to delineate themechanisms by which Rg1 activates the rapid ER signaling pathways. Methods: ER-positive human breast cancer MCF-7 cells and ER-negative human embryonic kidneyHEK293 cells were treated with Rg1 (10 12M, 10 8M), 17ß-estradiol (10 8M), or vehicle. Immunoprecipitationwas conducted to investigate the interactions between signaling protein and ER in MCF-7 cells. To determine the roles of these signaling proteins in the actions of Rg1, small interfering RNA or theirinhibitors were applied. Results: Rg1 rapidly induced ERa translocation to plasma membrane via caveolin-1 and the formation ofsignaling complex involving linker protein (Shc), insulin-like growth factor-I receptor, modulator ofnongenomic activity of ER (MNAR), ERa, and cellular nonreceptor tyrosine kinase (c-Src) in MCF-7 cells. The induction of extracellular signal-regulated protein kinase and mitogen-activated protein kinase kinase(MEK) phosphorylation in MCF-7 cells by Rg1 was suppressed by cotreatment with small interferingRNA against these signaling proteins. The stimulatory effects of Rg1 on MEK phosphorylation in thesecells were suppressed by both PP2 (Src kinase inhibitor) and AG1478 [epidermal growth factor receptor(EGFR) inhibitor]. In addition, Rg1-induced estrogenic activities, EGFR and MEK phosphorylation in MCF-7 cells were abolished by cotreatment with G15 (G protein-coupled estrogen receptor-1 antagonist). Theincrease in intracellular cyclic AMP accumulation, but not Ca mobilization, in MCF-7 cells by Rg1 could beabolished by G15. Conclusion: Ginsenoside Rg1 exerted estrogenic actions by rapidly inducing the formation of ER containingsignalosome in MCF-7 cells. Additionally, Rg1 could activate EGFR and c-Src ER-independentlyand exert estrogenic effects via rapid activation of membrane-associated ER and G protein-coupled estrogenreceptor.
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Gao, Quan-Gui,Zhou, Li-Ping,Lee, Vien Hoi-Yi,Chan, Hoi-Yi,Man, Cornelia Wing-Yin,Wong, Man-Sau The Korean Society of Ginseng 2019 Journal of Ginseng Research Vol.43 No.4
Background: Ginsenoside Rg1 was shown to exert ligand-independent activation of estrogen receptor (ER) via mitogen-activated protein kinase-mediated pathway. Our study aimed to delineate the mechanisms by which Rg1 activates the rapid ER signaling pathways. Methods: ER-positive human breast cancer MCF-7 cells and ER-negative human embryonic kidney HEK293 cells were treated with Rg1 ($10^{-12}M$, $10^{-8}M$), $17{\beta}$-estradiol ($10^{-8}M$), or vehicle. Immunoprecipitation was conducted to investigate the interactions between signaling protein and ER in MCF-7 cells. To determine the roles of these signaling proteins in the actions of Rg1, small interfering RNA or their inhibitors were applied. Results: Rg1 rapidly induced $ER{\alpha}$ translocation to plasma membrane via caveolin-1 and the formation of signaling complex involving linker protein (Shc), insulin-like growth factor-I receptor, modulator of nongenomic activity of ER (MNAR), $ER{\alpha}$, and cellular nonreceptor tyrosine kinase (c-Src) in MCF-7 cells. The induction of extracellular signal-regulated protein kinase and mitogen-activated protein kinase kinase (MEK) phosphorylation in MCF-7 cells by Rg1 was suppressed by cotreatment with small interfering RNA against these signaling proteins. The stimulatory effects of Rg1 on MEK phosphorylation in these cells were suppressed by both PP2 (Src kinase inhibitor) and AG1478 [epidermal growth factor receptor (EGFR) inhibitor]. In addition, Rg1-induced estrogenic activities, EGFR and MEK phosphorylation in MCF-7 cells were abolished by cotreatment with G15 (G protein-coupled estrogen receptor-1 antagonist). The increase in intracellular cyclic AMP accumulation, but not Ca mobilization, in MCF-7 cells by Rg1 could be abolished by G15. Conclusion: Ginsenoside Rg1 exerted estrogenic actions by rapidly inducing the formation of ER containing signalosome in MCF-7 cells. Additionally, Rg1 could activate EGFR and c-Src ER-independently and exert estrogenic effects via rapid activation of membrane-associated ER and G protein-coupled estrogen receptor.
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