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Xian Y, Gao Y, Su Y, Su Y, Lian H, Feng X, Liu Z, Zhao J, Xu J, Liu Q, Song F. Cichoric acid targets RANKL to inhibit osteoclastogenesis and prevent ovariectomy-induced bone loss. Phytother Res 2024; 38:1971-1989. [PMID: 38358727 DOI: 10.1002/ptr.8141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 01/13/2024] [Accepted: 01/21/2024] [Indexed: 02/16/2024]
Abstract
BACKGROUND AND AIM Osteoporosis, a systemic metabolic bone disease, is characterized by the decline of bone mass and quality due to excessive osteoclast activity. Currently, drug-targeting osteoclasts show promising therapy for osteoporosis. In this study, we investigated the effect of cichoric acid (CA) on receptor activator of nuclear kappa-B ligand (RANKL)-induced osteoclastogenesis and the bone loss induced by ovariectomy in mice. EXPERIMENTAL PROCEDURE Molecular docking technologies were employed to examine the interaction between CA and RANKL. CCK8 assay was used to evaluate the cell viability under CA treatment. TRAcP staining, podosome belt staining, and bone resorption assays were used to test the effect of CA on osteoclastogenesis and osteoclast function. Further, an OVX-induced osteoporosis mice model was employed to identify the effect of CA on bone loss using micro-CT scanning and histological examination. To investigate underlying mechanisms, network pharmacology was applied to predict the downstream signaling pathways, which were verified by Western blot and immunofluorescence staining. KEY RESULTS The molecular docking analysis revealed that CA exhibited a specific binding affinity to RANKL, engaging multiple binding sites. CA inhibited RANKL-induced osteoclastogenesis and bone resorption without cytotoxic effects. Mechanistically, CA suppressed RANKL-induced intracellular reactive oxygen species, nuclear factor-kappa B, and mitogen-activated protein kinase pathways, followed by abrogated nuclear factor activated T-cells 1 activity. Consistent with this finding, CA attenuated post-ovariectomy-induced osteoporosis by ameliorating osteoclastogenesis. CONCLUSIONS AND IMPLICATIONS CA inhibited osteoclast activity and bone loss by targeting RANKL. CA might represent a promising candidate for treating osteoclast-related diseases, such as osteoporosis.
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Affiliation(s)
- Yansi Xian
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, China
- Division of Sports Medicine and Adult Reconstructive Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yijie Gao
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, China
| | - Yiji Su
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yuangang Su
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Haoyu Lian
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xiaoliang Feng
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, China
| | - Zhijuan Liu
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, China
| | - Jinmin Zhao
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, China
| | - Jiake Xu
- School of Biomedical Sciences, the University of Western Australia, Perth, Australia
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Qian Liu
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Fangming Song
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, China
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Liu B, Xian Y, Chen X, Shi Y, Dong J, Yang L, An X, Shen T, Wu W, Ma Y, He Y, Gong W, Peng R, Lin J, Liu N, Guo B, Jiang Q. Inflammatory Fibroblast-Like Synoviocyte-Derived Exosomes Aggravate Osteoarthritis via Enhancing Macrophage Glycolysis. Adv Sci (Weinh) 2024; 11:e2307338. [PMID: 38342630 PMCID: PMC11005727 DOI: 10.1002/advs.202307338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 01/23/2024] [Indexed: 02/13/2024]
Abstract
The severity of osteoarthritis (OA) and cartilage degeneration is highly associated with synovial inflammation. Although recent investigations have revealed a dysregulated crosstalk between fibroblast-like synoviocytes (FLSs) and macrophages in the pathogenesis of synovitis, limited knowledge is available regarding the involvement of exosomes. Here, increased exosome secretion is observed in FLSs from OA patients. Notably, internalization of inflammatory FLS-derived exosomes (inf-exo) can enhance the M1 polarization of macrophages, which further induces an OA-like phenotype in co-cultured chondrocytes. Intra-articular injection of inf-exo induces synovitis and exacerbates OA progression in murine models. In addition, it is demonstrated that inf-exo stimulation triggers the activation of glycolysis. Inhibition of glycolysis using 2-DG successfully attenuates excessive M1 polarization triggered by inf-exo. Mechanistically, HIF1A is identified as the determinant transcription factor, inhibition of which, both pharmacologically or genetically, relieves macrophage inflammation triggered by inf-exo-induced hyperglycolysis. Furthermore, in vivo administration of an HIF1A inhibitor alleviates experimental OA. The results provide novel insights into the involvement of FLS-derived exosomes in OA pathogenesis, suggesting that inf-exo-induced macrophage dysfunction represents an attractive target for OA therapy.
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Xian Y, Nong Y, Gao Y, Su Y, Lei Z, Lian H, Cheng J, Liang J, Feng X, Liu Z, Zhao J, Zhao T, Su Z, Liu Q, Song F. UPLC/Q-TOF-MS-based metabolomics evaluate the efficacy of oroxylin A against postmenopausal osteoporosis. Biomed Chromatogr 2023; 37:e5609. [PMID: 36811170 DOI: 10.1002/bmc.5609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 01/04/2023] [Accepted: 02/14/2023] [Indexed: 02/23/2023]
Abstract
Post-menopausal osteoporosis (PMOP) is a common metabolic bone malady characterized by bone mass loss and bone microarchitectural deterioration; however, there is currently no effective drug for its management. According to our previous study, oroxylin A (OA) could effectively protect ovariectomized (OVX)-osteoporotic mice from bone loss; however, its therapeutic targets are still unclear. From a metabolomic perspective, we studied serum metabolic profiles to discover potential biomarkers and OVX-related metabolic networks, which could assist us to comprehend the impact of OA on OVX. Five metabolites were identified as biomarkers associated with 10 related metabolic pathways, including phenylalanine, tyrosine and tryptophan biosynthesis, and phenylalanine, tryptophan and glycerophospholipid metabolism. After OA treatment, the expression of multiple biomarkers changed, with lysophosphatidylcholine (18:2) being a major significantly regulated biomarker. Our study demonstrated that OA's effects on OVX are probably related to the regulation of phenylalanine, tyrosine and tryptophan biosynthesis. Our findings explain the role of OA against PMOP in terms of metabolism and pharmacology and provide a pharmacological foundation for OA treatment of PMOP.
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Affiliation(s)
- Yansi Xian
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.,Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, Guangxi, China
| | - Yunyuan Nong
- Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China
| | - Yijie Gao
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.,Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, Guangxi, China
| | - Yuangang Su
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Zhiqiang Lei
- School of Clinical Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Haoyu Lian
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Jianwen Cheng
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Jiamin Liang
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Xiaoliang Feng
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.,Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, Guangxi, China
| | - Zhijuan Liu
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.,Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, Guangxi, China
| | - Jinmin Zhao
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.,Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, Guangxi, China
| | - Tongling Zhao
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, Guangxi, China
| | - Zhiheng Su
- Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China
| | - Qian Liu
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Fangming Song
- Guangxi Key Laboratory of Regenerative Medicine, Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.,Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, Guangxi, China
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4
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Long F, Chen R, Su Y, Liang J, Xian Y, Yang F, Lian H, Xu J, Zhao J, Liu Q. Epoxymicheliolide inhibits osteoclastogenesis and resists OVX-induced osteoporosis by suppressing ERK1/2 and NFATc1 signaling. Int Immunopharmacol 2022; 107:108632. [DOI: 10.1016/j.intimp.2022.108632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/30/2022] [Accepted: 02/13/2022] [Indexed: 02/02/2023]
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Wu L, Liang J, Li J, Xu Y, Chen J, Su Y, Xian Y, Wei J, Xu J, Zhao J, Liu Q, Yang Y. Onc201 reduces osteoclastogenesis and prevents ovariectomy-induced bone loss via inhibiting RANKL-induced NFATc1 activation and the integrin signaling pathway. Eur J Pharmacol 2022; 923:174908. [PMID: 35405113 DOI: 10.1016/j.ejphar.2022.174908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/17/2022] [Accepted: 03/17/2022] [Indexed: 11/03/2022]
Abstract
Osteoporosis is an osteolytic disease with a disrupted balance between the resorption and formation of bone as well as bone microstructure degeneration, leading to bone loss and increased fracture risk, which greatly affects patients' quality of life. Currently, inhibition of osteoclast bone resorption remains the mainstream treatment for osteoporosis. Onc201, a new compound, induces the gene expression of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) and has an efficient anticancer effect in clinical trials. However, its effects on osteolytic disease and the mechanism of action are unclear. We examined the effect of Onc201 on nuclear factor κB ligand-receptor activator (RANKL)-induced osteoclasts via Cell Counting Kit-8, bone resorption assay, luciferase reporter assay, immunofluorescence staining, calcium ion intensity assay and employed an ovariectomy model to investigate the effect of Onc201 on osteoporosis in the mice. Results showed that Onc201 inhibited the function and formation of osteoclasts induced by RANKL in a manner that was dependent on time and concentration, and did not cause cytotoxicity. Mechanistically, Onc201 inhibited osteoclast-relevant genes and NFATc1 expression, the main transcriptional regulatory factor of the formation of osteoclasts induced by RANKL; meanwhile, downregulating the expressions of the osteoclast cytoskeleton key signal molecules integrin αvβ3, focal adhesion kinase (FAK), c-Src, and spleen-associated tyrosine kinase (SYK). In addition, Onc201 had a protective effect on the mouse model of bone loss caused by ovariectomy-induced estrogen deficiency, which is consistent with the in vitro results. Our findings suggest that the new small-molecular compound Onc201 has the potential to prevent osteoclast-related osteolytic diseases.
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Affiliation(s)
- Liwei Wu
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China; Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Jiamin Liang
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China; Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Jing Li
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China; Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Yang Xu
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Junchun Chen
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China; Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Yuangang Su
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China; Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Yansi Xian
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China; Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Jiyong Wei
- Department of Orthopedics, The First People's Hospital of Nanning, Nanning, Guangxi, 530016, People's Republic of China
| | - Jiake Xu
- School of Biomedical Sciences, University of Western Australia, Perth, WA, 6009, Australia
| | - Jinmin Zhao
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China; Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
| | - Qian Liu
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China.
| | - Yuan Yang
- Department of Orthopedics, Kaiyuan Langdong Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, 530028, People's Republic of China; Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China.
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Tan S, Su Y, Huang L, Deng S, Yan G, Yang X, Chen R, Xian Y, Liang J, Liu Q, Cheng J. Corilagin attenuates osteoclastic osteolysis by enhancing HO‐1 and inhibiting ROS. J Biochem Mol Toxicol 2022; 36:e23049. [PMID: 35307913 DOI: 10.1002/jbt.23049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/13/2022] [Accepted: 03/04/2022] [Indexed: 12/13/2022]
Affiliation(s)
- Shaolin Tan
- Department of Trauma Orthopedic and Hand Surgery The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
- Department of Orthopaedics The Second Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
- Guangxi Key Laboratory of Regenerative Medicine Guangxi Medical University Nanning Guangxi China
| | - Yuangang Su
- Guangxi Key Laboratory of Regenerative Medicine Guangxi Medical University Nanning Guangxi China
| | - Linke Huang
- Research Centre for Regenerative Medicine, Department of Orthopaedic The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
- Department of Orthopaedics The Second Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
| | - Siyu Deng
- Department of Trauma Orthopedic and Hand Surgery The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
| | - Guohua Yan
- Department of Trauma Orthopedic and Hand Surgery The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
| | - Xue Yang
- Guangxi Key Laboratory of Regenerative Medicine Guangxi Medical University Nanning Guangxi China
| | - Runfeng Chen
- Guangxi Key Laboratory of Regenerative Medicine Guangxi Medical University Nanning Guangxi China
| | - Yansi Xian
- Guangxi Key Laboratory of Regenerative Medicine Guangxi Medical University Nanning Guangxi China
| | - Jiamin Liang
- Guangxi Key Laboratory of Regenerative Medicine Guangxi Medical University Nanning Guangxi China
| | - Qian Liu
- Research Centre for Regenerative Medicine, Department of Orthopaedic The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
- Guangxi Key Laboratory of Regenerative Medicine Guangxi Medical University Nanning Guangxi China
| | - Jianwen Cheng
- Department of Trauma Orthopedic and Hand Surgery The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
- Research Centre for Regenerative Medicine, Department of Orthopaedic The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
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Xian Y, Su Y, Liang J, Long F, Feng X, Xiao Y, Lian H, Xu J, Zhao J, Liu Q, Song F. Oroxylin A reduces osteoclast formation and bone resorption via suppressing RANKL-induced ROS and NFATc1 activation. Biochem Pharmacol 2021; 193:114761. [PMID: 34492273 DOI: 10.1016/j.bcp.2021.114761] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/02/2021] [Accepted: 09/02/2021] [Indexed: 01/15/2023]
Abstract
Excessive bone erosion by osteoclasts is associated with osteoporosis, rheumatoid arthritis, and periprosthetic osteolysis. Targeting osteoclasts may serve as an effective treatment for osteolytic diseases. Although drugs are currently available for the treatment of these diseases, exploring potential anti-osteoclast natural compounds with safe and effective treatment remains needed. Oroxylin A (OA), a natural flavonoid isolated from the root of Scutellaria baicalensis Georgi, has numerous beneficial pharmacological characteristics, including anti-inflammatory and antioxidant activity. However, its effects and mechanisms on osteoclast formation and bone resorption have not yet been clarified. Our research showed that OA attenuated the formation and function of osteoclast induced by RANKL in a time- and concentration-dependent manner without any cytotoxicity. Mechanistically, OA suppressed intracellular reactive oxygen species (ROS) levels through the Nrf2-mediated antioxidant response. Moreover, OA inhibited the activity of NFATc1, the master transcriptional regulator of RANKL-induced osteoclastogenesis. OA exhibited protective effects in mouse models of post-ovariectomy (OVX)- and lipopolysaccharide (LPS)-induced bone loss, in accordance with its in vitro anti-osteoclastogenic effect. Collectively, our findings highlight the potential of OA as a pharmacological agent for the prevention of osteoclast-mediated osteolytic diseases.
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Affiliation(s)
- Yansi Xian
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China; Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Yuangang Su
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Jiamin Liang
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Feng Long
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China; Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Xiaoliang Feng
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China; Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Yu Xiao
- Medical College of Guangxi University, Nanning, Guangxi, China
| | - Haoyu Lian
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Jiake Xu
- School of Biomedical Sciences, the University of Western Australia, Perth, Australia
| | - Jinmin Zhao
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China; Orthopaedic Department, the First Affiliated Hospital of Guangxi Medical University, Guangxi, China
| | - Qian Liu
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China.
| | - Fangming Song
- Guangxi Key Laboratory of Regenerative Medicine, Research Centre for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China; Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning, Guangxi, China.
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Xiao Y, Xian Y, Hu X, Qi Z. D(-)-salicin inhibits RANKL-induced osteoclast differentiation and function in vitro. Fitoterapia 2021; 157:104981. [PMID: 34182052 DOI: 10.1016/j.fitote.2021.104981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/08/2021] [Accepted: 06/23/2021] [Indexed: 11/16/2022]
Abstract
Osteoporosis is a disease, which causes huge economic and social burden. Using natural compound to treat such disease is beneficial for the fewer side effects and effectiveness. D-(-)-salicin (DSA) is a component extracted from the bark of Populus and Salix species. In our research, we discovered that DSA suppressed RANKL-induced differentiation of osteoclast in vitro in a dose-dependent manner. It was also found that the mineral resorbing activity by osteoclasts was depressed via DSA. For the mechanism, we confirmed the inhibitory effect, by which DSA suppressed osteoclast formation and function, was through the inhibition of ROS signaling, MAPK and NF-κB cascades. DSA also suppressed the expression and activity of NFATc1. Therefore, by inhibiting the ROS production, MAPK and NF-κB signal cascade, DSA inhibited the osteoclast differentiation and function in vitro.
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Affiliation(s)
- Yu Xiao
- Medical College of Guangxi University, Da-Xue-Dong Road No.100, Nanning, Guangxi 530004, China
| | - Yansi Xian
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning, Guangxi 530021, China
| | - Xinmei Hu
- Medical College of Guangxi University, Da-Xue-Dong Road No.100, Nanning, Guangxi 530004, China
| | - Zhongquan Qi
- Medical College of Guangxi University, Da-Xue-Dong Road No.100, Nanning, Guangxi 530004, China.
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Loo S, Li H, Xian Y, Tsui J, Tusi S, Lin Z. 313 An oral decaherb formula suppressed Th2 inflammation and improved gut microbiota profile with 16S rRNA sequencing in mice model with atopic dermatitis. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Huang J, Liu J, Xian Y, Liu B, Wu Y, Zhan C, Liang W, Luo W, Lai K, Chen R. Elevated Circulating CD4 +CD25 +CD127 -/low Regulatory T Cells in Patients with Non-asthmatic Eosinophilic Bronchitis. Lung 2020; 198:491-497. [PMID: 32367413 DOI: 10.1007/s00408-020-00358-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 04/24/2020] [Indexed: 01/11/2023]
Abstract
PURPOSE Non-asthmatic eosinophilic bronchitis (NAEB) is a common cause of chronic cough. It is characterized by sputum eosinophilia like asthma but lacks airway hyperresponsiveness. Regulatory T cells (Tregs) are recognized as immune suppressors and are involved in the pathogenesis of asthma. However, the relationship between Tregs and NAEB remains unknown. This study aimed to preliminarily explore the role of Tregs in NAEB by comparing circulating Tregs levels to asthma and healthy controls. METHODS Fractional exhaled nitric oxide (FeNO), spirometry with bronchial provocation test, sputum induction and blood routine test were performed in all subjects. Peripheral blood mononuclear cells were used to detect the Tregs (CD4+CD25+CD127-/low) by flow cytometry. Relationship between the levels of circulating Tregs and clinical indexes was also observed. RESULTS A total of 15 patients with NAEB, 20 patients with asthma and 11 healthy controls were included. The absolute numbers of circulating Tregs in the NAEB group (49.8 ± 18.9 × 103 cells/ml) and asthma group (53.3 ± 18.7 × 103 cells/ml) were higher than that in healthy control group (32.7 ± 11.6 × 103 cells/ml) (both P < 0.01). In total, the level of circulating Tregs showed positive correlation with FeNO (r = 0.30, P < 0.05). CONCLUSION Tregs may play a key role not only in asthmatic patients, but also in patients with NAEB, as reflected by the elevated Tregs in peripheral blood.
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Affiliation(s)
- Jieru Huang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China.,Kingmed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jiaxing Liu
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China
| | - Yansi Xian
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China.,Kingmed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Bixia Liu
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China.,Kingmed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yinglin Wu
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China.,Kingmed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Chen Zhan
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China
| | - Wanqin Liang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China
| | - Wei Luo
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China
| | - Kefang Lai
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China
| | - Ruchong Chen
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, China.
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11
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Abstract
We examine the combined effects of a Kekulé coupling texture (KC) and a Dzyaloshinskii-Moriya interaction (DMI) in a two-dimensional ferromagnetic honeycomb lattice. By analyzing the gap closing conditions and the inversions of the bulk bands, we identify the parameter range in which the system behaves as a trivial or a nontrivial topological magnon insulator. We find four topological phases in terms of the KC parameter and the DMI strength. We present the bulk-edge correspondence for the magnons in a honeycomb lattice with an armchair or a zigzag boundary. Furthermore, we find Tamm-like edge states due to the intrinsic on-site interactions along the boundary sites. Our results may have significant implications to magnon transport properties in the 2D magnets at low temperatures.
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Affiliation(s)
- Pierre A Pantaleón
- School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom
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12
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Kaufman B, O’Brien E, Stearns S, Xian Y, Matsouaka R, Holmes G, Weinberger M, Taylor D. SHARED SAVINGS ACOS AND PALLIATIVE CARE FOR ISCHEMIC STROKE PATIENTS: FINDINGS FROM GET WITH THE GUIDELINES-STROKE. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- B Kaufman
- University of North Carolina at Chapel Hill
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13
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Zhao XY, Li JX, Tang XF, Xian Y, Xu JJ, Song Y, Chen J, Song L, Gao LJ, Gao Z, Qiao SB, Yang YJ, Gao RL, Xu B, Yuan JQ. P6420Evaluation the predictive value of PARIS score for long-term out-of-hospital events after percutaneous coronary interventions. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- X Y Zhao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - J X Li
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Depm, of Epidemiology, Beijing, China People's Republic of
| | - X F Tang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Y Xian
- Duke Clinical Research Institute, Durham, United States of America
| | - J J Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Y Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - J Chen
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - L Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - L J Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Z Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - S B Qiao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Y J Yang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - R L Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - B Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - J Q Yuan
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
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14
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Zhao XY, Li JX, Tang XF, Xian Y, Xu JJ, Song Y, Chen J, Song L, Gao LJ, Gao Z, Qiao SB, Yang YJ, Gao RL, Xu B, Yuan JQ. P6419Prognostic value of the GRACE discharge score for long-term death in patients with stable coronary artery disease after percutaneous coronary intervention. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- X Y Zhao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - J X Li
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Department of Epidemiology, Beijing, China People's Republic of
| | - X F Tang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Y Xian
- Duke Clinical Research Institute, Durham, United States of America
| | - J J Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Y Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - J Chen
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - L Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - L J Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Z Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - S B Qiao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Y J Yang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - R L Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - B Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - J Q Yuan
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
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15
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Xian Y, Li B, Pan P, Wang Y, Pei X, Yang Y. Role of Autophagy in Ovarian Cryopreservation by Vitrification. Cryo Letters 2018; 39:201-210. [PMID: 30059567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
BACKGROUND Ovarian cryopreservation by vitrification and transplantation are useful methods to recover female fertility after radiotherapy and chemotherapy. As type II programmed cell death, autophagy plays important roles in ovarian follicle development, ovarian follicle atresia and anti-stress injury. OBJECTIVE The potential role of autophagy in ovarian vitrification was investigated. MATERIALS AND METHODS Mouse ovaries were cryopreserved by vitrification, and autophagy was treated, after which the ovarian histology was checked, and ovarian follicles were counted. The apoptotic rate was detected by TUNEL, and apoptotic molecular marker cleaved caspase-3 was checked by immunofluorescence and western blot analysis. RESULTS Our results suggested that autophagy was increased in the process of vitrification compared with the fresh ovaries (p<0.05). The number of primordial follicles was decreased through inhibiting or over-activating the autophagy by autophagy inhibitor or activator (p<0.05). However, the number of primary follicles, antral follicles and atretic follicles was not significantly different compared with vitrified/warmed groups. The apoptotic rate was significantly increased in the vitrified/warmed, autophagy-inhibiting and over-activating groups compared with the fresh group (p<0.05), and this result was further confirmed by western blot analysis. CONCLUSIONS Taken together, autophagy was activated in the ovarian cryopreservation by vitrification and plays a role in a natural adaptive response to cold stress in ovarian cryopreservation by vitrification.
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Affiliation(s)
- Y Xian
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - B Li
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - P Pan
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - Y Wang
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - X Pei
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China.
| | - Y Yang
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China.
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16
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Wen FY, Xiao L, Xian Y, Wen XH, Guan XM, Liao ML, Yu J. [Prognosis of the central nervous system involvement in patients with hemophagocytic lymphohistiocytosis]. Zhonghua Xue Ye Xue Za Zhi 2017; 38:848-852. [PMID: 29166736 PMCID: PMC7364957 DOI: 10.3760/cma.j.issn.0253-2727.2017.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the characteristics and prognostic factor of central nervous system (CNS) involvement in patients with hemophagocytic lymphohistiocytosis (HLH) . Methods: From January 2006 to October 2015, 152 patients with HLH, 88 patients had CNS involvement, their clinical data were collected, and survival was analyzed using the Kaplan-Meier life table method, univariate and multivariate Cox regression model analyses were applied to identify the risk factors of prognosis. Results: ①57.9% patients complicated with neurological symptoms, cerebrospinal fluid abnormalities were observed in 37.0% patients, 57.5% patients had abnormal neuroradiology. ②36 patients survived well, 3 patients lost to follow-up, 49 dead, 1 survival patient had epilepsy. ③The 3-year overall survival rate of 88 patients was 44%. ④abnormal CSF and unreceived IT bore a significant, independent adverse prognostic value (P<0.05) . Conclusion: CNS involvement in HLH has a high frequency and poor prognosis, few patients remained neurologic sequelae; abnormal CSF related to poor prognosis, positive intrathecal injections could improve the prognosis.
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Affiliation(s)
- F Y Wen
- Department of Hematology and Oncology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
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17
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Gundlund A, Xian Y, Peterson E, Butt J, Gadsboell K, Olesen J, Koeber L, Torp-Pedersen C, Gislason G, Fosboel E. P4308Pre- and post-stroke antithrombotic therapy in atrial fibrillation patients - a Danish nation-wide registry-based study. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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18
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Vinereanu D, Al-Khalidi H, Rao M, Lopes R, Bahit C, Ciobanu A, Pokorney S, Xian Y, Jiang J, Kamath D, Berwanger O, Tajer C, Huo Y, Xavier D, Granger C. P3631Determinants of antithrombotic treatment of patients with AF: baseline characteristics from a clustered randomized trial to IMProve treatment with AntiCoagulanTs in patients with AF (IMPACT-AF). Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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19
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Abstract
We investigate the properties of magnon edge states in a ferromagnetic honeycomb spin lattice with a Dzialozinskii-Moriya interaction (DMI). We derive analytical expressions for the energy spectra and wavefunctions of the edge states localized on the boundaries. By introducing an external on-site potential at the outermost sites, we show that the bosonic band structure is similar to that of the fermionic graphene. We investigate the region in the momentum space where the bosonic edge states are well defined and we analyze the width of the edge state and their dependence with the DMI strength. Our findings extend the predictions using topological arguments and they allow size-dependent confirmation from possible experiments.
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Affiliation(s)
- Pierre A Pantaleón
- Theoretical Physics Division, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom
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20
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Xiao L, Guan XM, Meng Y, Zhao XD, Xian Y, An YF, Yu J. [X-linked lymphoproliferative syndrome type 1 complicated with secondary hemophagocytic lymphohistiocytosis and ileal perforation: case report and literature review]. Zhonghua Er Ke Za Zhi 2016; 54:290-293. [PMID: 27055430 DOI: 10.3760/cma.j.issn.0578-1310.2016.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To analyze and summarize the clinical characteristics, laboratory tests and treatment of X-linked lymphoproliferative syndrome type 1 (XLP-1). METHOD A retrospective study was done in 2012 on an XLP-1 patient to collect the data on clinical manifestation, laboratory examination, gene and protein expression, complications and prognosis. Literatures were reviewed in Pubmed with the key word"X-linked lymphoproliferative syndrome". RESULT The patient with persistent high fever, jaundice, abdominal distension, hepatosplenomegaly and lymphadenectasis, rash and suspicious positive family history; the patient eventually died of hemophagocytic lymphohistiocytosis (HLH), with intestinal perforation, intestinal infection and bleeding after being infected with EB virus. This patient with SH2D1A gene exon 1 large fragment of the coding region of the nucleotide deletion and insertion mutations causing missense mutations (p.Leu25Lys) and nonsense mutations (stop codon TAG was inserted after missense mutation so that the protein encoded by the early termination of the 25 amino acids), which led to SAP protein missing. The expression of SAP in his mother was also partly missing. Retrieval of reports on XLP-1 was conducted through literature search (included totally 157 cases) at home and abroad, positive family history accounted for 60.6%(40/66); lymphoma incidence accounted for 49.7%(72/145); low gamma globulin occurred in 24.8%(39/157) of cases; secondary HLH ratio accounted for 43.3%(68/157); XLP-1 in patients with hemorrhagic enteritis and gastritis was low, accounted for only 2.6%(3/116). CONCLUSION XLP-1 patients occasionally develop necrotic enteritis complicated with ileal perforation.XLP-1 with large fragment deletion of SH2D1A gene might be associated with serious gastrointestinal manifestations.
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Affiliation(s)
- L Xiao
- Department of Hematology and Oncology, Nephropathy, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
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21
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O'Brien EC, Xian Y, Fonarow GC, Olson DM, Schwamm LH, Hernandez AF. Clinical Commentary on "Certain Uncertainty: Life After Stroke From the Patient's Perspective". Circ Cardiovasc Qual Outcomes 2014; 7:970. [DOI: 10.1161/circoutcomes.114.001484] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Lin CB, Peterson ED, Smith EE, Saver JL, Liang L, Xian Y, Olson DM, Shah BR, Hernandez AF, Schwamm LH, Fonarow GC. Patterns, Predictors, Variations, and Temporal Trends in Emergency Medical Service Hospital Prenotification for Acute Ischemic Stroke. J Am Heart Assoc 2012. [DOI: 10.1161/jaha.112.002345x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Merdan M, Xian Y. Coupled-cluster calculations for the ground and excited states of the spin-half XXZ model. J Phys Condens Matter 2011; 23:406001. [PMID: 21937779 DOI: 10.1088/0953-8984/23/40/406001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The coupled-cluster method is applied to the spin-1/2 antiferromagnetic XXZ model on a square lattice by employing an approximation which contains two-body long-range correlations and high-order four-body local correlations. Improvement is found for the ground-state energy, the sublattice magnetization and the critical anisotropy when comparing with the approximation including the two-body correlations alone. We also obtain the full excitation spectrum which is in good agreement with the quantum Monte Carlo results and the high-order spin-wave theory.
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Affiliation(s)
- Mohammad Merdan
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK
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24
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Abstract
By extending our recently proposed magnon-density waves to low dimensions, we investigate, using a microscopic many-body approach, the longitudinal excitations of the quasi-one-dimensional (quasi-1d) and quasi-2d Heisenberg antiferromagnetic systems on a bipartite lattice with a general spin quantum number. We obtain the full energy spectrum of the longitudinal mode as a function of the coupling constants in the original lattice Hamiltonian and find that it always has a nonzero energy gap if the ground state has a long-range order and becomes gapless for the pure isotropic 1d model. The numerical value of the minimum gap in our approximation agrees with that of a longitudinal mode observed in the quasi-1d antiferromagnetic compound KCuF3 at low temperature. It will be interesting to compare values of the energy spectrum at other momenta if their experimental results are available.
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Affiliation(s)
- Y Xian
- School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK
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Mohile S, Xian Y, Fan L. P104 The impact of a new cancer diagnosis on vulnerability in older Medicare beneficiaries. Crit Rev Oncol Hematol 2009. [DOI: 10.1016/s1040-8428(09)70142-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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26
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Zhou H, Xu J, Rodriguez M, van den Haak F, Zhu X, Xian Y, Nelson G, Jogani R, Keall P, Graves E. TH-C-BRC-10: Evaluation of a Micro-CT Based 3D Conformal Animal Radiotherapy System. Med Phys 2009. [DOI: 10.1118/1.3182624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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27
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Mohile SG, Xian Y, Lazurenko I, Morrow GR, Fisher SG, Hall W. The impact of cancer on vulnerability in older Medicare beneficiaries. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.9578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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28
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Xian Y, Liu M, Cai Q, Li H, Lu J, Jin L. Preparation of microporous aluminium anodic oxide film modified Pt nano array electrode and application in direct measurement of nitric oxide release from myocardial cells. Analyst 2001; 126:871-6. [PMID: 11445954 DOI: 10.1039/b010181h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel method for fabricating a nano array electrode (NAE) by using micropores of aluminium anodic film as templates was investigated. To evaluate the NAE, cyclic scanning of NAE in Fe(CN)6(3-) solution was performed and a sigmoidal shaped voltammogram was obtained. The NAE was designed to measure nitric oxide (NO) in vitro and in vivo. Studies showed that it was a sensitive and selective NO electrochemical sensor. NO release from myocardial cells was directly measured with this NAE and the results were satisfactory.
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Affiliation(s)
- Y Xian
- Department of Chemistry, East China Normal University, Shanghai 200062, China
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29
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Li H, Tu H, Cai Q, Xian Y, Jin L. Determination of sulfur dioxide in vitriol plant wastewater by using a polyNiMe4TAA electrochemically modified Pt microelectrode. Analyst 2001; 126:669-72. [PMID: 11394311 DOI: 10.1039/b009164m] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pt microelectrode modified with nickel(II) polytetramethyldibenzo[b,i]tetraaza[14]annulene was prepared by electropolymerization of nickel(II) tetramethyldibenzo[b,i]tetraaza[14]annulene monomers and applied to determine sulfur dioxide in vitriol plant wastewater. For determination of SO2 with this electrochemically modified Pt microelectrode, the linear range was from 9.6 x 10(-6) to 2.4 x 10(-4) mol L-1, the sensitivity was 1.8 x 10(-4) A L mol-1, the detection limit was calculated to be 4.8 x 10(-6) mol L-1 (S/N = 3), the response time was less than 20 s and the relative standard deviation was found to be 2.1% on analyzing 4.8 x 10(-5) mol L-1 SO2 solution repeatedly (n = 7). These results demonstrated good accuracy compared with those obtained by the conventional iodimetric method.
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Affiliation(s)
- H Li
- Department of Chemistry, East China Normal University, Shanghai, 200062, China
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30
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Xue J, Ying X, Chen J, Xian Y, Jin L. Amperometric ultramicrosensors for peroxynitrite detection and its application toward single myocardial cells. Anal Chem 2000; 72:5313-21. [PMID: 11080882 DOI: 10.1021/ac000701e] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The research studied the concentration variation of peroxynitrite anion (O=N-O-O-) released from cultured neonatal myocardial cells induced by ischemia/reperfusion and studied the protective effect of melatonin on the injury. For this purpose, amperometry peroxynitrite ultramicrosensors (UMS) were fabricated and constructed by electropolymerizing inorganic macromolecular film of tetraaminophthalocyanine manganese(II) and coating chemically with poly(4-vinylpyridine). Under optimum conditions, the UMS showed high selectivity and sensitivity to peroxynitrite determination with a calculated detection limit of 1.8 x 10(-8) mol/L (S/N of 3). The detection of peroxynitrite was based on electrocatalytic reduction of peroxynitrite. The mechanism of catalysis was also discussed. The UMS should be promising for in vivo measurement of peroxynitrite without interference or fouling. Peroxynitrite released from myocardial cells both in the ischemic period and in the reperfusion period was measured directly. This approach may lead to important information for myocardial cells on the mechanism of injury and prospective treatments of medicine such as melatonin.
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Affiliation(s)
- J Xue
- Department of Chemistry, School of Chemistry & Life Science, East China Normal University, Shanghai, PR. of China.
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Abstract
Nitric oxide (NO) plays an important role in various physiological processes, acting either as an intra- and intercellular messenger or as a toxic agent. The detection and quantification of NO have been accomplished by a variety of methodologies. In the present study, real-time production of NO in the rat heart was continuously measured by using a novel copper-platinum microparticle-modified NO electrochemical microsensor. The linearity range of the microsensor is between 8.0 x 10(-8) and 4.8 x 10(-6) mol L-1 and the detection limit is 3.0 x 10(-8) mol L-1. NO release from the rat heart stimulated by the agonists L-arginine and acetylcholine was observed, and the responses were decreased by the NO synthase inhibitor L-N omega-nitroarginine. In addition, the effect of sodium nitroprusside (SNP), a NO donor, was also studied. SNP increases the concentration of NO in the rat heart. The experiments showed that electrochemical detection is suitable for detecting and quantifying NO in biological systems.
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Affiliation(s)
- Y Xian
- Department of Chemistry, East China Normal University, Shanghai, China
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32
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Xu R, Xian Y. [Theoretical analysis of Cu-O bond stretching vibration out of CuO2 plane of bi-system high temperature]. Guang Pu Xue Yu Guang Pu Fen Xi 2000; 20:295-297. [PMID: 12958936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this article, according to the molecule vibration theory and on the base of simple model, the stretching vibration modes of Cu-O bond out of CuO2 plane were analysed and stretching vibration frequencies were calculated. The calculating result approximately coincided with the result of experimental analysis.
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Affiliation(s)
- R Xu
- Deparment of Physics, Liaoning University, 110036 Shenyang
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Xu R, Tang H, Li C, Xian Y. [Analysis of Cu-O bond stretching vibration in CuO2 plane of Bi-system high temperature superconductor]. Guang Pu Xue Yu Guang Pu Fen Xi 1999; 19:44-46. [PMID: 15818913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Infrared absorption spectra of Bi-system high zero resistance temperature (Tc) superconductors were measured. The relation between Cu-O bond stretching vibration in CuO2 plane and superconducting properties of Bi-system high Tc superconductors were analysed and discussed. The result of analysis indicated that the change of absorption peak strength of Cu-O bond stretching vibration was similar to the change of Tc. The reason was related to the coupling between the phonon and free carrier. And according to the theory of molecule vibration, the frequencies of Cu-O bond stretching vibration in CuO2 plane were calculated on the base of simplified model.
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Affiliation(s)
- R Xu
- Department of Physics, Liaoning University, 110036 Shenyang
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34
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Xian Y, Li D, Li H, Sun S. [Synthesis of new pyrazoline fluorescent compounds and their IR spectra and fluorescence property]. Guang Pu Xue Yu Guang Pu Fen Xi 1998; 18:543-546. [PMID: 15825363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The Fluorescent compounds of pyrazoline have been used in many field. According to Schellhammer theory, we designed and synthesized five new benzothiazoyl pyrazoline compounds. Their infrared spectra and fluorescent spectra of five compounds were detected. The results showed that five compounds have fluorescence, fluorescence emission wavelength is about 450nm. Effect of different substituents on the fluorescent intensity was investigated.
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Affiliation(s)
- Y Xian
- Department of Light Industry and Textile Engineering, Jilin Institute of Technology, 130012 Changchun
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35
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Xian Y, Lan T, Wang Y. [Effects of flunarizine and vitamin C on hemodynamics in rat heart subjected to ischemia-reperfusion]. Hua Xi Yi Ke Da Xue Xue Bao 1998; 29:285-8. [PMID: 10684094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Langendorff perfusion isolated rat heart was subjected to total global ischemia (coronary flow rate is equal to zero) for 10 minutes and reperfusion for 15 minutes. The heart rate (HR), left ventricular developed pressure (LVDP), coronary flow rate (CFR), electrocardiogram (ECG) and the effects of calcium antagonist-flunarizine (FNZ) and/or oxygen free radical scavenger--vitamine C on the above parameters were observed. The results showed that FNZ dilated coronary vessel (P < 0.01) and had a slight negative chronotropic effect, but it had no effect on LVP. Vitamine C did not affect HR, LVP and CFR. The recovery of the product of HR and LVDP-Rate Pressure Product (RPP) in the FNZ + Vit. C group, Vit. C group and FNZ group was significantly higher than that in the control group (P < 0.05) at ten minutes reperfusion. All the results suggest that FNZ and Vit. C may improve the recovery of heart function after reperfusion.
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Affiliation(s)
- Y Xian
- Department of Physiology, School of Basic Medical Sciences, Chengdu
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36
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Xian Y, Lan T, Wang Y. [Protective effects of flunarizine and vitamin C on isolated rat heart subjected to ischemia-reperfusion injury]. Hua Xi Yi Ke Da Xue Xue Bao 1998; 29:155-9. [PMID: 10684005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Isolated rat heart was subjected to Langendorff perfusion for 10 minutes of total global ischemia, and reperfusion for 15 minutes. The content of myocardial intracellular calcium, content of oxygen free radical induced lipid peroxide mitabolite-malondialdehyde (MDA), content of Lactic dehydrogenase (LDH) in coronary effluent, and the change of myocardial morphology were studied. The effects of flunarizine(FNZ) and/or vitamin C(Vit C) on the above parameters were observed. The results showed that, at 15 minutes of reperfusion, the contents of myocardial intracellular calcium, of MDA in myocaredium and of LDH in coronary effluent in the FNZ + Vit C group, Vit C group and FNZ group were all lower than those in the control group, and the change of morphology in the three groups was also slighter than that in the control group. When FNZ and Vit C were administered together, the effect was more marked and equivalent to the sum total of the effects of the two drugs. These suggest that both FNZ and Vit C reduce reperfusion injury through suppression of myocardium calcium overload and oxygen free radical damage.
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Affiliation(s)
- Y Xian
- Department of Physiology, School of Basic Medical Sciences, Chengdu
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Abobo CV, Xian Y. Lack of pharmacokinetic interaction between dipyridamole and zalcitabine in rats. Cell Mol Biol (Noisy-le-grand) 1997; 43:1045-50. [PMID: 9449537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Resistance usually manifests following long-term dideoxynucleoside therapy of HIV-1 infection. This period appears to coincide with reduced dosage regimens. Resistance that is associated with long-term monotherapy may, in part, be due to decreased intracellular drug concentrations. It has been reported that intracellular uptake of the dideoxynucleosides is enhanced by dipyridamole. Hence, dipyridamole may potentially be used to optimize the effects of zalcitabine in HIV-1 antiretroviral "cocktail". The purpose of this study was to characterize the pharmacokinetics of zalcitabine when administered alone and concomitantly with dipyridamole. Also, we determined, indirectly, whether dipyridamole modulated the intracellular uptake of zalcitabine. Rats were intravenously administered either zalcitabine 100 mg/kg alone or with dipyridamole 15 mg/kg. Except renal clearance (CIR), there were no statistically significant differences in the pharmacokinetic parameters including the steady-state volume of distribution and distribution coefficient. Zalcitabine plasma concentrations declined rapidly in a bi-exponential fashion, with a terminal half-life of 1.03 +/- 0.18 hr. alone versus 1.08 +/- 0.22 hr. with dipyridamole. The area under the concentration-time curve was not significantly different with or without dipyridamole. ClR, was 1.42 +/- 0.37 l/hr./kg for zalcitabine alone versus 1.09 +/- 0.28 l/hr./kg with dipyridamole. Our single dose study show that zalcitabine disposition kinetics were not significantly modulated by dipyridamole.
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Affiliation(s)
- C V Abobo
- Department of Pharmacy Practice, College of Pharmacy and Health Sciences, Texas Southern University, Houston 77004, USA
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Abstract
A low-resolution three-dimensional model of membrane-bound H,K-ATPase from pig gastric mucosa has been reconstructed by electron microscopy and image processing of two-dimensional crystals in negative stain. The crystal formation is induced by magnesium and vanadate, which stabilize the E2 conformation of the enzyme. The unit cell, with a size of a = b = 123 A, gamma = 90 degrees, has tetragonal p4 symmetry. There are four separate alpha beta protomers within each unit cell. The high-contrast region is limited to the cytoplasmic part of the protein. The total volume of the observed asymmetric protein domain corresponds to a molecular mass of 80-90 kDa. It consists mainly of a large pear-shaped domain measuring 60 x 45 A2, with a height of 50 A as measured perpendicular to the membrane plane. A small stalk segment, 20 A in length, forms a connection to the transmembrane region.
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Affiliation(s)
- Y Xian
- Department of Biosciences at Novum, Karolinska Institutet, Huddinge, Sweden
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Xian Y. Rigorous results on a first-order phase transition in antiferromagnetic spin-1/2 coupled chains. Phys Rev B Condens Matter 1995; 52:12485-12488. [PMID: 9980394 DOI: 10.1103/physrevb.52.12485] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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40
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Bishop RF, Hale RG, Xian Y. Systematic inclusion of high-order multispin correlations for the spin-1/2 XXZ models. Phys Rev Lett 1994; 73:3157-3160. [PMID: 10057302 DOI: 10.1103/physrevlett.73.3157] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bishop RF, Kendall AS, Wong LY, Xian Y. Correlations in Abelian lattice gauge field models: A microscopic coupled-cluster treatment. Phys Rev D Part Fields 1993; 48:887-901. [PMID: 10016319 DOI: 10.1103/physrevd.48.887] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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42
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Bishop RF, Parkinson JB, Xian Y. Coupled-cluster calculations of quantum XXZ models with a general spin. Phys Rev B Condens Matter 1992; 46:880-888. [PMID: 10003273 DOI: 10.1103/physrevb.46.880] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
Two-dimensional crystallization of membrane-bound H,K-ATPase (EC 3.6.1.36) in vesicle preparations from parietal cells of hog gastric mucosa was induced by an imidazole buffer containing Mg2+ and VO3- ions. A continuous reorganization of the protein molecules started within a few hours by the formation of linear arrays. At later stages confluent two-dimensional crystals were formed. Electron microscopy and image processing showed that these were of a single tetragonal type. The asymmetric unit consisted of one pear-shaped protein domain corresponding to a H,K-ATPase protomer. Through stain-deficient contact regions four adjacent protein units were connected forming a tetrameric structure.
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Affiliation(s)
- H Hebert
- Center for Structural Biochemistry, Karolinska Institute, Novum, Huddinge, Sweden
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Bishop RF, Parkinson JB, Xian Y. Many-body correlations in quantum antiferromagnets: A microscopic coupled-cluster approach. Phys Rev B Condens Matter 1991; 43:13782-13785. [PMID: 9997247 DOI: 10.1103/physrevb.43.13782] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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