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Wei L, Ran J, Li Z, Zhang Q, Guo K, Mu S, Xie Y, Xie A, Xiao Y. Chemical Composition, Antibacterial Activity and Mechanism of Action of Fermentation Products from Aspergillus Niger xj. Appl Biochem Biotechnol 2024; 196:878-895. [PMID: 37256487 DOI: 10.1007/s12010-023-04577-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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] [Accepted: 05/24/2023] [Indexed: 06/01/2023]
Abstract
Six compounds were isolated and purified from the crude acetone extract of Aspergillus niger xj. Characterization of all compounds was done by NMR and MS. On the basis of chemical and spectral analysis structure, six compounds were elucidated as metazachlor (1), nonacosane (2), palmitic acid (3), 5,5'-oxybis(5-methylene-2-furaldehyde) (4), dimethyl 5-nitroisophthalate (5) and cholesta-3,5-dien-7-one (6), respectively, and compounds 1, 4, 5 and 6 were isolated for the first time from A. niger. To evaluate the antibacterial activity of compounds 1-6 against three plant pathogenic bacteria (Agrobacterium tumefaciens T-37, Erwinia carotovora EC-1 and Ralstonia solanacearum RS-2), and the minimum inhibitory concentrations (MICs) were determined by broth microdilution method in 96-well microtiter plates. Results of the evaluation of the antibacterial activity showed that T-37 strain was more susceptible to metazachlor with the lowest MIC of 31.25 µg/mL. The antibacterial activity of metazachlor has rarely been reported, thus the antibacterial mechanism of metazachlor against T-37 strain were investigated. The permeability of cell membrane demonstrated that cells membranes were broken by metazachlor, which caused leakage of ions in cells. SDS-PAGE of T-37 proteins indicated that metazachlor could damage bacterial cells through the destruction of cellular proteins. Scanning electron microscopy results showed obvious morphological and ultrastructural changes in the T-37 cells, further confirming the cell membrane damages caused by metazachlor. Overall, our findings demonstrated that the ability of metazachlor to suppress the growth of T-37 pathogenic bacteria makes it potential biocontrol agents.
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Affiliation(s)
- Longfeng Wei
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-bioengineering, Guizhou University, Guiyang, Guizhou Province, 550025, China
| | - Jiang Ran
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-bioengineering, Guizhou University, Guiyang, Guizhou Province, 550025, China
| | - Zhu Li
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-bioengineering, Guizhou University, Guiyang, Guizhou Province, 550025, China.
- Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, 550009, China.
| | - Qinyu Zhang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-bioengineering, Guizhou University, Guiyang, Guizhou Province, 550025, China
| | - Kun Guo
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-bioengineering, Guizhou University, Guiyang, Guizhou Province, 550025, China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Yudan Xie
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-bioengineering, Guizhou University, Guiyang, Guizhou Province, 550025, China
| | - Ailin Xie
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-bioengineering, Guizhou University, Guiyang, Guizhou Province, 550025, China
| | - Yang Xiao
- Institution of Supervision and Inspection Product Quality of Guizhou Province, Guiyang, China
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Lee J, Mu S, Stowe DJ. Revealing the 2D Distribution of Lithium in Cathode Materials Using the Composition-by-Difference Method. Microsc Microanal 2023; 29:1988-1990. [PMID: 37612940 DOI: 10.1093/micmic/ozad067.1030] [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] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- J Lee
- Gatan Inc., Pleasanton, CA, United States
| | - S Mu
- EDAX, LLC, Pleasanton, CA, United States
| | - D J Stowe
- Gatan Inc., Pleasanton, CA, United States
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Lee J, Mu S, Stowe DJ. Trace Element Identification and Quantification in Solar Cell Materials Using Energy Dispersive and Cathodoluminescence Spectroscopy. Microsc Microanal 2023; 29:1991-1993. [PMID: 37612939 DOI: 10.1093/micmic/ozad067.1031] [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] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- J Lee
- Gatan Inc, Pleasanton, California, United States of America
| | - S Mu
- EDAX LLC, Pleasanton, California, United States of America
| | - D J Stowe
- Gatan Inc, Pleasanton, California, United States of America
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Pan T, He M, Deng L, Li J, Fan Y, Hao X, Mu S. Design, Synthesis, and Evaluation of the COX-2 Inhibitory Activities of New 1,3-Dihydro- 2H-indolin-2-one Derivatives. Molecules 2023; 28:4668. [PMID: 37375225 DOI: 10.3390/molecules28124668] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/02/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Thirty-three 1,3-dihydro-2H-indolin-2-one derivatives bearing α, β-unsaturated ketones were designed and synthesized via the Knoevenagel condensation reaction. The cytotoxicity, in vitro anti-inflammatory ability, and in vitro COX-2 inhibitory activity of all the compounds were evaluated. Compounds 4a, 4e, 4i-4j, and 9d exhibited weak cytotoxicity and different degrees of inhibition against NO production in LPS-stimulated RAW 264.7 cells. The IC50 values of compounds 4a, 4i, and 4j were 17.81 ± 1.86 μM, 20.41 ± 1.61 μM, and 16.31 ± 0.35 μM, respectively. Compounds 4e and 9d showed better anti-inflammatory activity with IC50 values of 13.51 ± 0.48 μM and 10.03 ± 0.27 μM, respectively, which were lower than those of the positive control ammonium pyrrolidinedithiocarbamate (PDTC). Compounds 4e, 9h, and 9i showed good COX-2 inhibitory activities with IC50 values of 2.35 ± 0.04 µM, 2.422 ± 0.10 µM and 3.34 ± 0.05 µM, respectively. Moreover, the possible mechanism by which COX-2 recognized 4e, 9h, and 9i was predicted by molecular docking. The results of this research suggested that compounds 4e, 9h, and 9i might be new anti-inflammatory lead compounds for further optimization and evaluation.
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Affiliation(s)
- Taohua Pan
- College of Pharmacy, Guizhou University, Guiyang 550025, China
| | - Maofei He
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Lulu Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Jiang Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Yanhua Fan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Xiaojiang Hao
- Kunming Institute of Botany, Chinese Academy of Sciences (CAS), Kunming 650201, China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
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Xu X, Deng L, Tang Y, Li J, Zhong T, Hao X, Fan Y, Mu S. Cytostatic Activity of Sanguinarine and a Cyanide Derivative in Human Erythroleukemia Cells Is Mediated by Suppression of c-MET/MAPK Signaling. Int J Mol Sci 2023; 24:ijms24098113. [PMID: 37175820 PMCID: PMC10179035 DOI: 10.3390/ijms24098113] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/18/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Sanguinarine (1) is a natural product with significant pharmacological effects. However, the application of sanguinarine has been limited due to its toxic side effects and a lack of clarity regarding its molecular mechanisms. To reduce the toxic side effects of sanguinarine, its cyanide derivative (1a) was first designed and synthesized in our previous research. In this study, we confirmed that 1a presents lower toxicity than sanguinarine but shows comparable anti-leukemia activity. Further biological studies using RNA-seq, lentiviral transfection, Western blotting, and flow cytometry analysis first revealed that both compounds 1 and 1a inhibited the proliferation and induced the apoptosis of leukemic cells by regulating the transcription of c-MET and then suppressing downstream pathways, including the MAPK, PI3K/AKT and JAK/STAT pathways. Collectively, the data indicate that 1a, as a potential anti-leukemia lead compound regulating c-MET transcription, exhibits better safety than 1 while maintaining cytostatic activity through the same mechanism as 1.
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Affiliation(s)
- Xinglian Xu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Beijin Road, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
| | - Lulu Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Beijin Road, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
| | - Yaling Tang
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
- Kunming Institute of Botany, Chinese Academy of Sciences (CAS), Kunming 650201, China
| | - Jiang Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Beijin Road, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
| | - Ting Zhong
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Beijin Road, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
| | - Xiaojiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Beijin Road, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
- Kunming Institute of Botany, Chinese Academy of Sciences (CAS), Kunming 650201, China
| | - Yanhua Fan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Beijin Road, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Beijin Road, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Beijin Road, Guiyang 550014, China
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Gamlin CR, Schneider-Mizell CM, Mallory M, Elabbady L, Gouwens N, Williams G, Mukora A, Dalley R, Bodor A, Brittain D, Buchanan J, Bumbarger D, Kapner D, Kinn S, Mahalingam G, Seshamani S, Takeno M, Torres R, Yin W, Nicovich PR, Bae JA, Castro MA, Dorkenwald S, Halageri A, Jia Z, Jordan C, Kemnitz N, Lee K, Li K, Lu R, Macrina T, Mitchell E, Mondal SS, Mu S, Nehoran B, Popovych S, Silversmith W, Turner NL, Wong W, Wu J, Yu S, Berg J, Jarsky T, Lee B, Seung HS, Zeng H, Reid RC, Collman F, da Costa NM, Sorensen SA. Integrating EM and Patch-seq data: Synaptic connectivity and target specificity of predicted Sst transcriptomic types. bioRxiv 2023:2023.03.22.533857. [PMID: 36993629 PMCID: PMC10055412 DOI: 10.1101/2023.03.22.533857] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Neural circuit function is shaped both by the cell types that comprise the circuit and the connections between those cell types 1 . Neural cell types have previously been defined by morphology 2, 3 , electrophysiology 4, 5 , transcriptomic expression 6-8 , connectivity 9-13 , or even a combination of such modalities 14-16 . More recently, the Patch-seq technique has enabled the characterization of morphology (M), electrophysiology (E), and transcriptomic (T) properties from individual cells 17-20 . Using this technique, these properties were integrated to define 28, inhibitory multimodal, MET-types in mouse primary visual cortex 21 . It is unknown how these MET-types connect within the broader cortical circuitry however. Here we show that we can predict the MET-type identity of inhibitory cells within a large-scale electron microscopy (EM) dataset and these MET-types have distinct ultrastructural features and synapse connectivity patterns. We found that EM Martinotti cells, a well defined morphological cell type 22, 23 known to be Somatostatin positive (Sst+) 24, 25 , were successfully predicted to belong to Sst+ MET-types. Each identified MET-type had distinct axon myelination patterns and synapsed onto specific excitatory targets. Our results demonstrate that morphological features can be used to link cell type identities across imaging modalities, which enables further comparison of connectivity in relation to transcriptomic or electrophysiological properties. Furthermore, our results show that MET-types have distinct connectivity patterns, supporting the use of MET-types and connectivity to meaningfully define cell types.
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Fan Y, Zhang F, Xiong L, Su M, Luo F, Li M, Li Q, Zhong T, Yuan M, Xu Y, Mu S, Yang H. Design, synthesis, and biological evaluation of 6-(imidazo[1,2-a] pyridin-6-yl) quinazolin-4(3H)-one derivatives as potent anticancer agents by dual targeting Aurora kinase and ROR1. Bioorg Chem 2023; 135:106484. [PMID: 36963371 DOI: 10.1016/j.bioorg.2023.106484] [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: 12/31/2022] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 03/26/2023]
Abstract
ROR1 and Aurora kinase were overexpressed in various cancers and essential for cell proliferation, survive and metastasis. Pharmaceutical inhibition of ROR1 and Aurora kinase abrogated the activation of downstream signaling and induced cancer cell apoptosis. Hence, ROR1 and Aurora kinase considered as attractive therapeutic targets for the development of anticancer drugs. In the present work, three series of novel 6-(imidazo[1,2-a] pyridin-6-yl)-quinazolin-4(3H)-one derivatives were designed and synthesized via bioisosterism and scaffold-hopping strategies guided by FLF-13, an Aurora kinase inhibitor we discovered earlier. Most of compounds in series 2 and series 3 showed submicromolar to nanomolar inhibitory activity against multiple cancer cell lines. More importantly, compounds 12d and 12f in series 3 showed nanomolar inhibitory activity against all test cancer cells. The most promising compound 12d exhibited potent inhibitory activity against Aurora A and Aurora B with IC50 values of 84.41 nM and 14.09 nM, respectively. Accordingly, compounds 12d induced G2/M phase cell cycle arrest at 24 h and polyploidy at 48 h. It's worth noting that 12d also displayed inhibitory activity against ROR1 and induce cell apoptosis. Furthermore, 12d could significantly inhibit the tumor growth in SH-SY5Y xenograft model with tumor growth inhibitory rate (IR) up to 46.31 % at 10 mg/kg and 52.66 % at 20 mg/kg. Overall, our data suggested that 12d might serve as a promising candidate for the development of therapeutic agents for cancers with aberrant expression of ROR1 and Aurora kinases by simultaneously targeting ROR1 and Aurora kinase.
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Affiliation(s)
- Yanhua Fan
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China.
| | - Feng Zhang
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Liang Xiong
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Mingzhi Su
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Fang Luo
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Mei Li
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Qing Li
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Ting Zhong
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Meitao Yuan
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Yongnan Xu
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Shuzhen Mu
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China.
| | - Huarong Yang
- Chongqing Liangping District People's Hospital, Chongqing 405200, China.
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Wang B, Hu Z, Zhao L, Mu S, Dou Z, Wang P, Jin N, Lu X, Xu X, Liang T, Duan Y, Xiong Y. Regulation of CB1R/AMPK/PGC-1α signal pathway on the changes of mitochondria in heart and cardiomyocytes of mice with chronic intermittent hypoxia of different severity. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.731] [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: 10/17/2022]
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Wei L, Zhang Q, Xie A, Xiao Y, Guo K, Mu S, Xie Y, Li Z, He T. Isolation of Bioactive Compounds, Antibacterial Activity, and Action Mechanism of Spore Powder From Aspergillus niger xj. Front Microbiol 2022; 13:934857. [PMID: 35898902 PMCID: PMC9309528 DOI: 10.3389/fmicb.2022.934857] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 06/06/2022] [Indexed: 11/13/2022] Open
Abstract
Aspergillus fungi can produce a wide range of secondary metabolites, and they have represented a potential resource of novel bioactive compounds. Bacterial plant diseases have a serious impact on the sustainable development of agriculture worldwide, so it is necessary to use natural antibacterial compounds in microorganisms to control plant pathogens. This study was conducted to investigate the bioactive compounds of Aspergillus niger xj, three plant pathogens (Agrobacterium tumefaciens T-37, Erwinia carotovora EC-1, and Ralstonia solanacearum RS-2) were used as indicator bacteria, according to the biological activity tracking, five compounds were isolated from A. niger xj spore powder, and characterization of compounds was done by NMR (1H-NMR and 13C-NMR) and EI-MS and was identified as ergosterol (1), β-sitosterol (2), 5-pentadecylresorcinol (3), 5-hydroxymethyl-2-furancarboxylic acid (4), and succinimide (5). Compounds 3 and 5 were isolated from A. niger xj for the first time. The minimum inhibitory concentration (MIC) of five compounds against three plant pathogens was evaluated, the results showed that compound 4 exhibited the strongest antibacterial activity against tested bacteria, and RS-2 was the most sensitive to compound 4, showing the lowest MIC of 15.56 μg/ml. We concluded that the mechanism of action of the compound 4 against RS-2 might be described as compound 4 acting on bacterial protein synthesis and intracellular metabolism according to the results of the scanning electron microscopy observation, permeability of cell membrane and SDS-PAGE. These results indicated that compound 4 has good potential to be as a biocontrol agent. In conclusion, the results from this study demonstrated that the compounds with antibacterial activity are of great significance of the prevention and control of plant phytopathogenic bacteria, and they may be applicable to exploring alternative approaches to integrated control of phytopathogens.
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Affiliation(s)
- Longfeng Wei
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, China
- Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, China
| | - Qinyu Zhang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, China
| | - Ailin Xie
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, China
| | - Yang Xiao
- Institution of Supervision and Inspection Product Quality of Guizhou Province, Guiyang, China
| | - Kun Guo
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Yudan Xie
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, China
| | - Zhu Li
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, China
- Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, China
| | - Tengxia He
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, China
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Tang Y, Xu X, Li J, Deng L, Mu S. Synthesis and Antileukemia Activity Evaluation of Benzophenanthridine Alkaloid Derivatives. Molecules 2022; 27:molecules27123934. [PMID: 35745057 PMCID: PMC9227418 DOI: 10.3390/molecules27123934] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/12/2022] [Accepted: 06/13/2022] [Indexed: 11/16/2022]
Abstract
Thirty-three benzophenanthridine alkaloid derivatives (1a–1u and 2a–2l) were synthesized, and their cytotoxic activities against two leukemia cell lines (Jurkat Clone E6-1 and THP-1) were evaluated in vitro using a Cell Counting Kit-8 (CCK-8) assay. Nine of these derivatives (1i–l, 2a, and 2i–l) with IC50 values in the range of 0.18–7.94 μM showed significant inhibitory effects on the proliferation of both cancer cell lines. Analysis of the primary structure–activity relationships revealed that different substituent groups at the C-6 position might have an effect on the antileukemia activity of the corresponding compounds. In addition, the groups at the C-7 and C-8 positions could influence the antileukemia activity. Among these compounds, 2j showed the strongest in vitro antiproliferative activity against Jurkat Clone E6-1 and THP-1 cells with good IC50 values (0.52 ± 0.03 μM and 0.48 ± 0.03 μM, respectively), slightly induced apoptosis, and arrested the cell-cycle, all of which suggests that compound 2j may represent a potentially useful start point to undergo further optimization toward a lead compound.
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Affiliation(s)
- Yaling Tang
- College of Pharmacy, Guizhou University, Guiyang 550025, China;
| | - Xinglian Xu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; (X.X.); (J.L.)
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Jiang Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; (X.X.); (J.L.)
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Lulu Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; (X.X.); (J.L.)
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
- Correspondence: (L.D.); (S.M.)
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; (X.X.); (J.L.)
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
- Correspondence: (L.D.); (S.M.)
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Deng L, Cheng S, Li J, Xu X, Hao X, Fan Y, Mu S. Synthesis and biological evaluation of novel schisanhenol derivatives as potential hepatoprotective agents. Eur J Med Chem 2022; 227:113919. [PMID: 34688010 DOI: 10.1016/j.ejmech.2021.113919] [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: 08/26/2021] [Revised: 10/03/2021] [Accepted: 10/10/2021] [Indexed: 11/28/2022]
Abstract
Twenty-one new schisanhenol derivatives were synthesized, and their hepatoprotective effects against liver injury induced by concanavalin A (Con A) were evaluated in vitro using an MTT assay. The data indicated that most derivatives exhibited equivalent or better protective activity than the positive control (dimethyl dicarboxylate biphenyl, DDB) under the same conditions. Among them, compound 1b showed the most potent hepatoprotective activity against Con A-induced immunological injury. Mechanistic studies in vitro revealed that 1b inhibited cell apoptosis and inflammatory responses caused by Con A treatment via IL-6/JAK2/STAT3 signaling pathway. Consistently, it also exhibited significant hepatoprotective activity in mice with Con A-induced immunological liver injury. These results clearly indicated that 1b might be a highly potent hepatoprotective agent targeting IL-6/STAT3 signaling pathway.
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Affiliation(s)
- Lulu Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Baijin Road, Guiyang, 550014, China
| | - Shasha Cheng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Baijin Road, Guiyang, 550014, China
| | - Jiang Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Baijin Road, Guiyang, 550014, China
| | - Xinglian Xu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Baijin Road, Guiyang, 550014, China
| | - Xiaojiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Baijin Road, Guiyang, 550014, China
| | - Yanhua Fan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Baijin Road, Guiyang, 550014, China.
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, 3491 Baijin Road, Guiyang, 550014, China.
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12
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Wu W, Xuan Y, Ge Y, Mu S, Hu C, Fan R. Plasma miR-146a and miR-365 expression and inflammatory factors in patients with osteoarthritis. Malays J Pathol 2021; 43:311-317. [PMID: 34448795] [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: 06/13/2023]
Abstract
OBJECTIVE To investigate the expression levels of micro-ribonucleic acid (miR)-146a and miR-365 in the plasma of osteoarthritis (OA) patients, to study their expression with the inflammatory factors and the severity of disease in patients and to analyse their diagnostic significance. MATERIALS AND METHODS A total of 42 OA patients diagnosed with OA and treated in our hospital from January 2017 to January 2018 were selected as the subjects, and 28 healthy people were enrolled as controls. The expressions of interleukin-1 beta (IL-1β) and IL-6 in the plasma of OA patients were detected via immunohistochemical staining. Moreover, the knee joint function of OA patients was evaluated by Lysholm score, Western Ontario and McMaster Universities (WOMAC) score and Visual Analogue Scale (VAS) score. The expression levels of plasma miR-146a and miR-365 in OA patients were measured through RT-PCR. Besides, the significance of the expression levels of miR-146a and miR-365 for the diagnosis of OA was analysed by ROC curves. RESULTS As compared with healthy people, OA patients had elevated expression levels of plasma IL-1β and IL-6, decreased Lysholm score, increased WOMAC and VAS scores as well as significantly up-regulated levels of plasma miR-146a and miR-365, which were of important significance for diagnosis. CONCLUSION The expression levels of plasma miR-146a, miR-365 and inflammatory factors are notably higher, the disease is more severe, and the function of knee joint movement is weaker in OA patients than those in healthy controls. It can be concluded that the levels of both miR-146a and miR-365 can serve as biomarkers of OA diagnosis.
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Affiliation(s)
- W Wu
- The 904th Hospital of Joint Logistic Support Force, Department of Orthopedic, PLA, China, 214000.
| | - Y Xuan
- The second People's Hospital of Hefei, Department of Orthopedic, China, 230011
| | - Y Ge
- The 904th Hospital of Joint Logistic Support Force, Department of Orthopedic, PLA, China, 214000
| | - S Mu
- The 904th Hospital of Joint Logistic Support Force, Department of Orthopedic, PLA, China, 214000
| | - C Hu
- The 904th Hospital of Joint Logistic Support Force, Department of Orthopedic, PLA, China, 214000
| | - R Fan
- The 904th Hospital of Joint Logistic Support Force, Department of Orthopedic, PLA, China, 214000
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13
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Deng Y, Ding T, Deng L, Hao X, Mu S. Active constituents of Zanthoxylum nitidium from Yunnan Province against leukaemia cells in vitro. BMC Chem 2021; 15:44. [PMID: 34301301 PMCID: PMC8305521 DOI: 10.1186/s13065-021-00771-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 12/28/2020] [Indexed: 11/19/2022] Open
Abstract
Zanthoxylum nitidium (Roxb.) DC (Rutaceae) is well known for inhibiting the proliferation of human gastric, liver, kidney and lung cancer cells, though research on its potential use in treating leukaemia is relatively rare. Twenty-six compounds were isolated from the chloroform and petroleum ether extracts of the roots and leaves of Z. nitidium (Zanthoxylum nitidium). They were ( +)-9′-O-transferuloyl-5, 5′-dimethoxylaricriresinol (1), 8-(3′-oxobut-1′-en-1′-yl)-5, 7-dimethoxy-coumarin (2), 5, 7, 8-trimethoxy-coumarin (3), 5-(3′, 3′-dimethyl-2′-butenyloxy)-7, 8-dimethoxy-coumarin (4), 2-(5-methoxy-2-methyl-1H-indol-3-yl) methyl acetate (5), 2′-(5, 6-dihydrochleletrythrine-6-yl) ethyl acetate (6), 6-acetonyldi-hydrochelerythrine (7), 6β-hydroxymethyldihydronitidine (8), bocconoline (9), zanthoxyline (10), O-methylzanthoxyline (11), rhoifoline B (12), N-nornitidine (13), nitidine (14), chelerythrine (15), 4-hydroxyl-7,8-dimethoxy-furoquinoline (16), dictamnine (17), γ-fagarine (18), skimmianine (19), robustine (20), R-( +)-platydesmine (21), 4-methoxyl-1-methyl-2-quinoline (22), 4-methoxy-2-quinolone (23), liriodenine (24), aurantiamide acetate (25), 10-O-demethyl-12-O-methylarnottianamide (26). Four among them, compounds 4 – 6 and 16, were first confirmed in this study by UV, IR, 1D, 2D NMR and HR-ESI–MS spectra. Compounds 1 – 2 and 11 were isolated from Z. nitidium for the first time. Of the assayed compounds, 1, 2, 9, 10, 14, 15 and 24, exhibited good inhibitory activities in the leukaemia cell line HEL, whereas compound 14 (IC50: 3.59 µM) and compound 24 (IC50: 15.95 µM) exhibited potent inhibitory activities. So, to further investigate the possible mechanisms, cell cycle and apoptosis assays were performed, which indicated that compound 14 causes obvious S-phase arrest in HEL cells and induced apoptosis, whereas compound 24 only induced apoptosis. The present results suggested both compounds 14 and 24 are promising potential anti-leukaemia drug candidates.
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Affiliation(s)
- Ying Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, China.,College of Pharmacy, Guizhou University, Guiyang, 550025, China.,Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, 550014, China
| | - Tongtong Ding
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, China
| | - Lulu Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, China.,Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, 550014, China
| | - Xiaojiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, China.,Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, 550014, China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, China. .,Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, 550014, China.
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14
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Xie Y, Peng Q, Ji Y, Xie A, Yang L, Mu S, Li Z, He T, Xiao Y, Zhao J, Zhang Q. Isolation and Identification of Antibacterial Bioactive Compounds From Bacillus megaterium L2. Front Microbiol 2021; 12:645484. [PMID: 33841370 PMCID: PMC8024468 DOI: 10.3389/fmicb.2021.645484] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/04/2021] [Indexed: 11/13/2022] Open
Abstract
Bacterial metabolites exhibit a variety of biologically active compounds including antibacterial and antifungal activities. It is well known that Bacillus is considered to be a promising source of bioactive secondary metabolites. Most plant pathogens have an incredible ability to mutate and acquire resistance, causing major economic losses in the agricultural field. Therefore, it is necessary to use the natural antibacterial compounds in microbes to control plant pathogens. This study was conducted to investigate the bio-active compounds of Bacillus megaterium L2. According to the activity guidance of Agrobacterium tumefaciens T-37, Erwinia carotovora EC-1 and Ralstonia solanacearum RS-2, five monomeric compounds, including erucamide (1), behenic acid (2), palmitic acid (3), phenylacetic acid (4), and β-sitosterol (5), were fractionated and purified from the crude ethyl acetate extract of B. megaterium. To our knowledge, all compounds were isolated from the bacterium for the first time. To understand the antimicrobial activity of these compounds, and their minimum inhibitory concentrations (MICs) (range: 0.98∼500 μg/mL) were determined by the broth microdilution method. For the three tested pathogens, palmitic acid exhibited almost no antibacterial activity (>500 μg/mL), while erucamide had moderate antibacterial activity (MIC = 500 μg/mL). Behenic acid showed MICs of 250 μg/mL against T-37 and RS-2 strains with an antibacterial activity. β-sitosterol showed significant antimicrobial activity against RS-2. β-sitosterol showed remarkable antimicrobial activity against RS-2 with an MIC of 15.6 μg/mL. In addition, with the antimicrobial activity, against T-37 (62.5 μg/mL) and against EC-1 (125 μg/mL) and RS-2 (15.6 μg/mL) strains notably, phenylacetic acid may be interesting for the prevention and control of phytopathogenic bacteria. Our findings suggest that isolated compounds such as behenic acid, β-sitosterol, and phenylacetic acid may be promising candidates for natural antimicrobial agents.
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Affiliation(s)
- Yudan Xie
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
| | - Qiuju Peng
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
| | - Yuyu Ji
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
| | - Ailin Xie
- College of Life Sciences, Guizhou University, Guiyang, China
| | - Long Yang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Zhu Li
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
| | - Tengxia He
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
| | - Yang Xiao
- Institution of Supervision and Inspection Product Quality of Guizhou Province, Guiyang, China
| | - Jinyi Zhao
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
| | - Qinyu Zhang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
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15
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Li H, He YL, Li R, Wong C, Sy B, Lam CW, Lam K, Peng HM, Mu S, Schooling M, Yeung W, Ho PC, Ng E. Age-specific reference ranges of serum anti-müllerian hormone in healthy women and its application in diagnosis of polycystic ovary syndrome: a population study. BJOG 2020; 127:720-728. [PMID: 32009280 DOI: 10.1111/1471-0528.16147] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/23/2020] [Indexed: 01/01/2023]
Abstract
OBJECTIVE To establish the age-specific centiles of serum anti-müllerian hormone (AMH) levels in Chinese women, and to explore the use of multiples of median (MoM) AMH levels for the diagnosis of polycystic ovary syndrome (PCOS). DESIGN An observational study. SETTING University-affiliated hospitals and community clinics. POPULATION We included 3137 healthy women aged 20-44 years recruited prospectively or who had archived serum samples from previous research projects. Another validation cohort of 751 women with PCOS as well as ovulatory controls, which was a convenient sample of women attending for infertility or menstrual disorders, was also studied. METHODS The serum samples were assayed for AMH by the automated Access AMH assay. MAIN OUTCOME MEASURES Age-specific reference ranges were constructed on the primary cohort with the Lambda-Mu-Sigma method. The MoM AMH of each subject in the validation cohort was calculated. RESULTS Centile curves of serum AMH level against age were established. MoM AMH was significantly higher in women with PCOS than in controls (P < 0.05). The area under the ROC curve was 0.852 (95% confidence interval [CI] 0.825-0.877) (P < 0.0001) for discriminating women with PCOS from ovulatory controls by MoM AMH. CONCLUSIONS We established a set of year-by-year age-specific reference ranges of serum AMH levels in Chinese women. The MoM AMH derived from this set of reference ranges is a promising tool to replace antral follicle count in the diagnosis of PCOS. TWEETABLE ABSTRACT A set of age-specific reference ranges of AMH levels was established in Chinese women. Multiples of median AMH may be used to diagnose PCOS.
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Affiliation(s)
- Hwr Li
- Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynaecology, The University of Hong Kong - Shenzhen Hospital, Shenzhen, China.,Department of Obstetrics and Gynaecology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, Hong Kong.,The Family Planning Association of Hong Kong, Hong Kong, Hong Kong
| | - Y-L He
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - R Li
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Cyg Wong
- Department of Obstetrics and Gynaecology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, Hong Kong.,The Family Planning Association of Hong Kong, Hong Kong, Hong Kong
| | - B Sy
- Department of Family Medicine and Primary Care, The University of Hong Kong, Hong Kong, Hong Kong
| | - C W Lam
- Department of Pathology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, Hong Kong
| | - Ksl Lam
- Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, Hong Kong
| | - H-M Peng
- Reproductive Medicine Center, People's Liberation Army General Hospital, Beijing, China
| | - S Mu
- Reproductive Medicine Center, People's Liberation Army General Hospital, Beijing, China
| | - M Schooling
- School of Public Health, The University of Hong Kong, Hong Kong, Hong Kong
| | - Wsb Yeung
- Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynaecology, The University of Hong Kong - Shenzhen Hospital, Shenzhen, China.,Department of Obstetrics and Gynaecology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, Hong Kong
| | - P C Ho
- Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynaecology, The University of Hong Kong - Shenzhen Hospital, Shenzhen, China.,Department of Obstetrics and Gynaecology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, Hong Kong
| | - Ehy Ng
- Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynaecology, The University of Hong Kong - Shenzhen Hospital, Shenzhen, China.,Department of Obstetrics and Gynaecology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, Hong Kong
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16
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Voskoboynik M, Mileshkin L, Gan H, Millward M, Au-Yeung G, Meniawy T, Kichenadasse G, Zhang K, Zhang M, Mu S, Lickliter J. Safety, antitumor activity, and pharmacokinetics (PK) of pamiparib (BGB-290), a PARP1/2 inhibitor, in patients (pts) with advanced solid tumours: Updated phase I dose-escalation/expansion results. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz244.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Stradella A, Johnson M, Goel S, Chandana S, Galsky M, Calvo E, Moreno V, Park H, Arkenau HT, Cervantes A, Madrid LF, Mileshkin L, Plummer R, Evans J, Horvath L, Prawira A, Pelham R, Mu S, Andreu-Vieyra C, Barve M. Updated results of the PARP1/2 inhibitor pamiparib in combination with low-dose (ld) temozolomide (TMZ) in patients (pts) with locally advanced or metastatic solid tumours. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz244.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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18
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Johnson M, Galsky M, Barve M, Goel S, Park H, Du B, Mu S, Ramakrishnan V, Wood K, Wang V, Lakhani N. Preliminary results of pamiparib (BGB-290), a PARP1/2 inhibitor, in combination with temozolomide (TMZ) in patients (pts) with locally advanced or metastatic solid tumors. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy279.409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wu X, Wang J, Zhou Q, Gu T, Zhang K, Liang J, Mu S, Ge R, Yang H, Huang V, Brachmann R, Wang L, Li M. Pamiparib, a novel PARP 1/2 inhibitor, monotherapy for gBRCAm patients with recurrent ovarian, fallopian, and primary peritoneal cancer: An open-label, multicenter, phase II trial in China. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy285.205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Mu S, Tee BC, Emam H, Zhou Y, Sun Z. Culture-expanded mesenchymal stem cell sheets enhance extraction-site alveolar bone growth: An animal study. J Periodontal Res 2018; 53:514-524. [DOI: 10.1111/jre.12541] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2018] [Indexed: 12/25/2022]
Affiliation(s)
- S. Mu
- Department of Periodontology and Oral Mucosa; The Second Affiliated Hospital of Harbin Medical University; Harbin China
| | - B. C. Tee
- Division of Biosciences; College of Dentistry; The Ohio State University; Columbus OH USA
| | - H. Emam
- Division of Oral and Maxillofacial Surgery; College of Dentistry; The Ohio State University; Columbus OH USA
| | - Y. Zhou
- Department of Chemistry and Biochemistry; The Ohio State University; Columbus OH USA
| | - Z. Sun
- Division of Orthodontics; College of Dentistry; The Ohio State University; Columbus OH USA
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21
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Mu S, Cui Y, Wang W, Wang L, Xu H, Zhu O, Zhu D. A RHAG point mutation selectively disrupts Rh antigen expression. Transfus Med 2018; 29:121-127. [PMID: 29508504 DOI: 10.1111/tme.12519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 06/13/2017] [Revised: 12/29/2017] [Accepted: 02/11/2018] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The aim of this study was to characterise a novel mutation in the gene encoding RhAG in order to elucidate a molecular mechanism for Rh antigen expression and spherocytosis. BACKGROUND Rhesus-associated glycoprotein (RhAG) is critical for maintaining the structure and stability of erythrocytes. Single missense mutations in the gene encoding RhAG are sufficient to induce spherocytosis and deficiencies in Rh complex formation. We report a novel missense mutation that incompletely disrupts Rh antigen expression and selectively knocks out RhD antigen expression. METHODS Blood samples were taken from a 38-year-old male, his brother, his wife and his daughter in Xi'an, China. To detect the proband's RhAG and D antigen expression, the RBC were stained with anti-D and anti-RhAG and analysed by flow cytometry. Red blood cell morphology was detected with atomic force microscopy (AFM). Genomic DNA was isolated from whole blood samples, and the RHD, RHCE and RHAG alleles were sequenced and analysed. The mutation was mapped onto a predicted crystal structure of RhAG by the I-TASSER server and visualised using PyMOL. RESULTS Morphological testing by AFM found clear evidence of spherocytosis in the proband's erythrocytes. RHAG gene sequencing identified the mutation at sequence 236G > A, resulting in a serine to asparagine substitution at residue 79 (S79N). Family survey indicated that inheriting this allele is necessary and sufficient to cause the condition. Mapping the mutation onto a predicted crystal structure of RhAG revealed the proximity of the mutation to the critical structural elements of the protein. CONCLUSIONS A novel RHAG mutation significantly lowers RhAG antigen expression and antigen-mediated agglutination intensity.
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Affiliation(s)
- S Mu
- Department of Transfusion Medicine, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
| | - Y Cui
- Department of Transfusion Medicine, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
| | - W Wang
- Department of Transfusion Medicine, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
| | - L Wang
- Department of Transfusion Medicine, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
| | - H Xu
- Shanxi Blood Center, Xi'an, China
| | - O Zhu
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois, USA
| | - D Zhu
- Department of Transfusion Medicine, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
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Fang J, Huang T, Xia M, Deng L, Hao X, Wang Y, Mu S. Design and synthesis of novel monoterpenoid indole alkaloid-like analogues and their antitumour activities in vitro. Org Biomol Chem 2018; 16:3026-3037. [PMID: 29634066 DOI: 10.1039/c8ob00677f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
34 novel monoterpenoid indole alkaloid analogues were synthesized based on combinatorial chemistry strategy. Compound 18 was found to be the most promising antitumour lead compound.
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Affiliation(s)
- Jiaqi Fang
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences
| | - Tao Huang
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences
| | - Mengyuan Xia
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- P. R. China
| | - Lulu Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences
| | - Xiaojiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences
| | - Yuehu Wang
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- P. R. China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
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Hong M, Zhang Y, Li S, Tan HY, Wang N, Mu S, Hao X, Feng Y. A Network Pharmacology-Based Study on the Hepatoprotective Effect of Fructus Schisandrae. Molecules 2017; 22:E1617. [PMID: 28956809 PMCID: PMC6151775 DOI: 10.3390/molecules22101617] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 09/17/2017] [Indexed: 12/19/2022] Open
Abstract
Fructus schisandrae (Wuweizi in Chinese), a common traditional Chinese herbal medicine, has been used for centuries to treat chronic liver disease. The therapeutic efficacy of Wuweizi has also been validated in clinical practice. In this study, molecular docking and network analysis were carried out to explore the hepatoprotective mechanism of Wuweizi as an effective therapeutic approach to treat liver disease. Multiple active compounds of Wuweizi were docked with 44 protein targets related with viral hepatitis, fatty liver, liver fibrosis, cirrhosis, and liver cancer. A compound-target network was constructed through network pharmacology analysis, predicting the relationships of active ingredients to the targets. Our results demonstrated that schisantherin, schisandrin B, schisandrol B, kadsurin, Wuweizisu C, Gomisin A, Gomisin G, and angeloylgomisin may target with 21 intracellular proteins associated with liver diseases, especially with fatty liver disease. The CYP2E1, PPARα, and AMPK genes and their related pathway may play a pivotal role in the hepatoprotective effects of Wuweizi. The network pharmacology strategy used provides a forceful tool for searching the action mechanism of traditional herbal medicines and novel bioactive ingredients.
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Affiliation(s)
- Ming Hong
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China.
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, 12 Jichang Road, Guangzhou 510405, China.
| | - Yongsheng Zhang
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China.
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou 310053, China.
| | - Sha Li
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China.
| | - Hor Yue Tan
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China.
| | - Ning Wang
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China.
| | - Shuzhen Mu
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 55500, China.
| | - Xiaojiang Hao
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 55500, China.
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650000, China.
| | - Yibin Feng
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China.
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Liu W, Mu S, Yao J, Chen H, Hu Z, Hu J, Chirn G, Kang H, Wang K, Yao M. Analytical and clinical validation of a next-generation sequencing-based circulating tumor DNA (ctDNA) assay assures its clinical application. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx378.005] [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: 11/13/2022] Open
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25
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Liu T, Yao Y, Zhang G, Wang Y, Deng B, Song J, Li X, Han F, Xiao X, Yang J, Xia L, Li YJ, Plachynta M, Zhang M, Yan C, Mu S, Luo H, Zacksenhaus E, Hao X, Ben-David Y. A screen for Fli-1 transcriptional modulators identifies PKC agonists that induce erythroid to megakaryocytic differentiation and suppress leukemogenesis. Oncotarget 2017; 8:16728-16743. [PMID: 28052010 PMCID: PMC5369997 DOI: 10.18632/oncotarget.14377] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 12/07/2016] [Indexed: 11/25/2022] Open
Abstract
The ETS-related transcription factor Fli-1 affects many developmental programs including erythroid and megakaryocytic differentiation, and is frequently de-regulated in cancer. Fli-1 was initially isolated following retrovirus insertional mutagenesis screens for leukemic initiator genes, and accordingly, inhibition of this transcription factor can suppress leukemia through induction of erythroid differentiation. To search for modulators of Fli-1, we hereby performed repurposing drug screens with compounds isolated from Chinese medicinal plants. We identified agents that can transcriptionally activate or inhibit a Fli-1 reporter. Remarkably, agents that increased Fli-1 transcriptional activity conferred a strong anti-cancer activity upon Fli-1-expressing leukemic cells in culture. As opposed to drugs that suppress Fli1 activity and lead to erythroid differentiation, growth suppression by these new Fli-1 transactivating compounds involved erythroid to megakaryocytic conversion (EMC). The identified compounds are structurally related to diterpene family of small molecules, which are known agonists of protein kinase C (PKC). In accordance, these PKC agonists (PKCAs) induced PKC phosphorylation leading to activation of the mitogen-activated protein kinase (MAPK) pathway, increased cell attachment and EMC, whereas pharmacological inhibition of PKC or MAPK diminished the effect of our PKCAs. Moreover, in a mouse model of leukemia initiated by Fli-1 activation, the PKCA compounds exhibited strong anti-cancer activity, which was accompanied by increased presence of CD41/CD61 positive megakaryocytic cells in leukemic spleens. Thus, PKC agonists offer a novel approach to combat Fli-1-induced leukemia, and possibly other cancers,by inducing EMC in part through over-activation of the PKC-MAPK-Fli-1 pathway.
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Affiliation(s)
- Tangjingjun Liu
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Yao Yao
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Gang Zhang
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Ye Wang
- College of Ecology, Lishui University, Zhejiang, China
| | - Bin Deng
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Jialei Song
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,The Laboratory of Cell Biochemistry and Topogenic Regulation, College of Bioengineering and Faculty of Sciences, Chongqing University, Chongqing, China
| | - Xiaogang Li
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Fei Han
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Xiao Xiao
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Jue Yang
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Lei Xia
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,School of Pharmaceutical Sciences, Guizhou University, Guizhou, China
| | - You-Jun Li
- Department of Anatomy, Norman Bethune College of Medicine, Jilin University, Changchun, China
| | - Maksym Plachynta
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Mu Zhang
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Chen Yan
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China
| | - Shuzhen Mu
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Heng Luo
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Eldad Zacksenhaus
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.,Division of Advanced Diagnostics, Toronto General Research Institute-University Health Network, Toronto, Ontario, Canada
| | - Xiaojiang Hao
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,School of Pharmaceutical Sciences, Guizhou University, Guizhou, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| | - Yaacov Ben-David
- Department of Biology and Chemistry, The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
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Li Y, Xu M, Ding X, Yan C, Song Z, Chen L, Huang X, Wang X, Jian Y, Tang G, Tang C, Di Y, Mu S, Liu X, Liu K, Li T, Wang Y, Miao L, Guo W, Hao X, Yang C. Protein kinase C controls lysosome biogenesis independently of mTORC1. Nat Cell Biol 2016; 18:1065-77. [PMID: 27617930 DOI: 10.1038/ncb3407] [Citation(s) in RCA: 229] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 08/11/2016] [Indexed: 12/13/2022]
Abstract
Lysosomes respond to environmental cues by controlling their own biogenesis, but the underlying mechanisms are poorly understood. Here we describe a protein kinase C (PKC)-dependent and mTORC1-independent mechanism for regulating lysosome biogenesis, which provides insights into previously reported effects of PKC on lysosomes. By identifying lysosome-inducing compounds we show that PKC couples activation of the TFEB transcription factor with inactivation of the ZKSCAN3 transcriptional repressor through two parallel signalling cascades. Activated PKC inactivates GSK3β, leading to reduced phosphorylation, nuclear translocation and activation of TFEB, while PKC activates JNK and p38 MAPK, which phosphorylate ZKSCAN3, leading to its inactivation by translocation out of the nucleus. PKC activation may therefore mediate lysosomal adaptation to many extracellular cues. PKC activators facilitate clearance of aggregated proteins and lipid droplets in cell models and ameliorate amyloid β plaque formation in APP/PS1 mouse brains. Thus, PKC activators are viable treatment options for lysosome-related disorders.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Meng Xu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China.,Graduate University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xiao Ding
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650021, China
| | - Chen Yan
- The Key Laboratory of Chemistry for Natural Product of Guizhou Province and Chinese Academy of Science, Guiyang 550002, China
| | - Zhiqin Song
- The Key Laboratory of Chemistry for Natural Product of Guizhou Province and Chinese Academy of Science, Guiyang 550002, China
| | - Lianwan Chen
- Key Laboratory of RNA Biology, Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, Chinese Academy of Sciences, No.15 Datun Road, Chaoyang District, Beijing 100101, China
| | - Xiahe Huang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Xin Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Youli Jian
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Guihua Tang
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650021, China
| | - Changyong Tang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Yingtong Di
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650021, China
| | - Shuzhen Mu
- The Key Laboratory of Chemistry for Natural Product of Guizhou Province and Chinese Academy of Science, Guiyang 550002, China
| | - Xuezhao Liu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China.,Graduate University of Chinese Academy of Sciences, Beijing 100039, China
| | - Kai Liu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China.,Graduate University of Chinese Academy of Sciences, Beijing 100039, China
| | - Ting Li
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Yingchun Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Long Miao
- Key Laboratory of RNA Biology, Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, Chinese Academy of Sciences, No.15 Datun Road, Chaoyang District, Beijing 100101, China
| | - Weixiang Guo
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Xiaojiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650021, China.,The Key Laboratory of Chemistry for Natural Product of Guizhou Province and Chinese Academy of Science, Guiyang 550002, China
| | - Chonglin Yang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, No.1 West Beichen Road, Chaoyang District, Beijing 100101, China
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Liu J, Jing L, Zhang Y, Song Y, Wang Y, Li C, Wang Y, Mu S, Paliwal N, Meng H, Linfante I, Yang X. O-017 Recurrent Intracranial Vertebral Artery Dissecting Aneurysms After Stent-assisted Coil Embolization-A Computational Fluid Dynamic Analysis. J Neurointerv Surg 2016. [DOI: 10.1136/neurintsurg-2016-012589.17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Beniwal S, Zhang X, Mu S, Naim A, Rosa P, Chastanet G, Létard JF, Liu J, Sterbinsky GE, Arena DA, Dowben PA, Enders A. Surface-induced spin state locking of the [Fe(H2B(pz)2)2(bipy)] spin crossover complex. J Phys Condens Matter 2016; 28:206002. [PMID: 27121917 DOI: 10.1088/0953-8984/28/20/206002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Temperature- and coverage-dependent studies of the Au(1 1 1)-supported spin crossover Fe(II) complex (SCO) of the type [Fe(H2B(pz)2)2(bipy)] with a suite of surface-sensitive spectroscopy and microscopy tools show that the substrate inhibits thermally induced transitions of the molecular spin state, so that both high-spin and low-spin states are preserved far beyond the spin transition temperature of free molecules. Scanning tunneling microscopy confirms that [Fe(H2B(pz)2)2(bipy)] grows as ordered, molecular bilayer islands at sub-monolayer coverage and as disordered film at higher coverage. The temperature dependence of the electronic structure suggest that the SCO films exhibit a mixture of spin states at room temperature, but upon cooling below the spin crossover transition the film spin state is best described as a mix of high-spin and low-spin state molecules of a ratio that is constant. This locking of the spin state is most likely the result of a substrate-induced conformational change of the interfacial molecules, but it is estimated that also the intra-atomic electron-electron Coulomb correlation energy, or Hubbard correlation energy U, could be an additional contributing factor.
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Affiliation(s)
- S Beniwal
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
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Chen G, Ning Y, Zhao W, Zhang Y, Zhang Y, Hao X, Wang Y, Mu S. Synthesis, Neuro-protection and Anti-cancer Activities of Simple Isatin Mannich and Schiff Bases. LETT DRUG DES DISCOV 2016. [DOI: 10.2174/1570180812666150907203342] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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30
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Mu S, Han L, Zhou G, Mo C, Duan J, He Z, Wang Z, Ren L, Zhang J. Protein regulation of induced pluripotent stem cells by transplanting in a Huntington's animal model. Neuropathol Appl Neurobiol 2016; 42:521-34. [PMID: 26859760 DOI: 10.1111/nan.12315] [Citation(s) in RCA: 4] [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: 06/26/2015] [Revised: 01/25/2016] [Accepted: 02/09/2016] [Indexed: 11/26/2022]
Affiliation(s)
- S. Mu
- Psychology & Social College of Shenzhen University; Shenzhen China
| | - L. Han
- School of Medicine; Shenzhen University; Shenzhen China
| | - G. Zhou
- School of Medicine; Shenzhen University; Shenzhen China
| | - C. Mo
- School of Medicine; Shenzhen University; Shenzhen China
| | - J. Duan
- School of Medicine; Shenzhen University; Shenzhen China
| | - Z. He
- School of Medicine; Shenzhen University; Shenzhen China
| | - Z. Wang
- Department of Neurology; Shenzhen Shekou People's Hospital; Shenzhen China
| | - L. Ren
- Department of Neurology; Shenzhen Second People's Hospital (First Affiliated Hospital of Shenzhen University); Shenzhen China
| | - J. Zhang
- School of Medicine; Shenzhen University; Shenzhen China
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Chen G, Hao X, Wang Y, Mu S. Synthesis, Anti-tumor Activity and Odd–even Effect of Simple Isatin Derivatives. LETT DRUG DES DISCOV 2015. [DOI: 10.2174/157018081210151012120940] [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: 11/22/2022]
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33
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Porro M, Sharma S, Witteveen P, Lolkema M, Hess D, Gelderblom H, Hussain S, Waldron E, Valera S, Mu S. 572 Oral panobinostat in patients with advanced tumors and impaired renal function: Relationship between pharmacokinetics and key safety parameters. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70698-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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You JM, Wang QH, Lin XM, Guo J, Ai LQ, Zhang MD, Mu S, Guo XL, He YS, Liu HH, Wang H, Zhang Y, Zhao RJ, Wang S. First Report of Gray Mold of Rhizoma paridis Caused by Botrytis cinerea in China. Plant Dis 2014; 98:1434. [PMID: 30703970] [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: 06/09/2023]
Abstract
Rhizoma paridis is a perennial, traditional Chinese medicinal herb. In May 2013, a disease was observed in an approximately 10 ha cultivated field in Enshi, Hubei Province, China. Approximately 80% of plants in the field were affected. Symptoms were visible on the basal leaves of affected plants. Chlorosis followed by necrosis started at the leaf tips and margins and gradually spread inward until the entire leaf was necrotic. Thick, gray mycelium and conidia were visible on both sides surface of leaves under wet, humid conditions. The leading edge of the chlorotic leaves was excised from 20 plant samples surface disinfested with 1% NaOCl solution for 1 min, rinsed in sterile water, air dried, and placed on potato dextrose agar (PDA). Plates were incubated at 22°C in the dark. Mycelia were initially hyaline and white, and became dark gray after 72 h. Mycelia were septate with dark branched conidiophores. Conidia were smooth, hyaline, ovoid, aseptate, and ranged from 8 to 14.5 × 7 to 8.5 μm. Numerous hard, small, irregular, and black sclerotia that were 1 to 3 × 2 to 5 mm were visible on PDA plates after 12 days. The fungus was identified as Botrytis cinerea on the basis of these characters (1). The internal transcribed spacer (ITS) region of rDNA was amplified using the ITS1 and ITS4 primer and sequenced (GenBank Accession No. KF265499). BLAST analysis of the PCR product showed 99% identity to Botryotinia fuckeliana (perfect stage of B. cinerea) (EF207415.1, EF207414.1). The pathogen was further identified to the species level as B. cinerea using gene sequences from glyceraldehyde-3-phosphate dehydrogenase (G3PDH), heat-shock protein 60 (HSP60), and DNA-dependent RNA polymerase subunit II (RPB2) (2) (KJ638600, KJ638602, and KJ638601). Pathogenicity was tested by spraying the foliage of 40 two-year-old plants with a suspension of 106 conidia per ml of sterile distilled water. Each plant received 30 ml of the inoculum. Ten healthy potted plants were inoculated with sterilized water as control. All plants were covered with plastic bags for 5 days after inoculation to maintain high relative humidity and were placed in a growth chamber at 22°C. The first foliar lesions developed on leaves 7 days after inoculation and were similar to those observed in the field. No symptoms developed on the control plants. B. cinerea was consistently re-isolated from all artificially inoculated plants. The pathogenicity test was completed twice. To our knowledge, this is the first report of gray mold of R. paridis caused by B. cinerea in China. The root of R. paridis is the most commonly used Chinese herbal medicine to treat viper bites. In recent years, cultivation of this herb has increased in China because of its high value. Consequently, the economic importance of this disease is likely to increase with the greater prevalence of this host species. References: (1) H. L. Barnett and B. B. Hunter. Illustrated Genera of Imperfect Fungi. Burgess Publishing Company, Minneapolis, MN, 1972. (2) M. Staats et al. Mol. Biol. Evol. 22:333, 2005.
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Affiliation(s)
- J M You
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - Q H Wang
- Key Lab of Plant Pathology of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - X M Lin
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - J Guo
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - L Q Ai
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - M D Zhang
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - S Mu
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - X L Guo
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - Y S He
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - H H Liu
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - H Wang
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - Y Zhang
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - R J Zhao
- Institute of Chinese Herbal Medicine, Hubei Academy of Agricultural Sciences, Enshi, Hubei, 445000, China
| | - S Wang
- Biology and Pharmacy Engineering Department of Shangluo University, Shangluo, Shanxi, 726000, China
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Chen G, Wang Y, Hao X, Mu S, Sun Q. Simple isatin derivatives as free radical scavengers: Synthesis, biological evaluation and structure-activity relationship. Chem Cent J 2011; 5:37. [PMID: 21722377 PMCID: PMC3150235 DOI: 10.1186/1752-153x-5-37] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 07/01/2011] [Indexed: 11/10/2022] Open
Abstract
To develop more potent small molecules with enhanced free radical scavenger properties, a series of N-substituted isatin derivatives was synthesized, and the cytoprotective effect on the apoptosis of PC12 cells induced by H2O2 was screened. All these compounds were found to be active, and N-ethyl isatin was found with the most potent activity of 69.7% protective effect on PC12 cells. Structure-activity relationship analyses showed the bioactivity of N-alkyl isatins decline as the increasing of the chain of the alkyl group, furthermore odd-even effect was found in the activity, which is interesting for further investigation.
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Affiliation(s)
- Gang Chen
- Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China.
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36
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Mu S, Moro-Oka T, Johal P, Hamai S, Freeman MAR, Banks SA. Comparison of static and dynamic knee kinematics during squatting. Clin Biomech (Bristol, Avon) 2011; 26:106-8. [PMID: 20870324 DOI: 10.1016/j.clinbiomech.2010.08.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 08/18/2010] [Accepted: 08/20/2010] [Indexed: 02/07/2023]
Abstract
BACKGROUND there long has been debate whether static knee kinematics measured using magnetic resonance imaging are the same as knee kinematics in dynamic weight-bearing motion. Magnetic resonance imaging provides excellent volumetric detail but is static. Fluoroscopic imaging provides for dynamic observation of knee kinematics but provides no direct observation of the soft-tissue structures. We attempted to answer the question 'Are knee kinematics the same during static and dynamic squatting?' METHODS knee kinematics data from two previously reported studies of healthy knee kinematics during squatting from 0° to 120° were obtained. The results of the dynamic fluoroscopic study were reformatted to perform a direct comparison of femoral anteroposterior translation and internal-external rotation with the static magnetic resonance imaging study. FINDINGS comparison of internal-external rotations and lateral femoral condyle anteroposterior translations did not reveal significant differences between static and dynamic data. The medial femoral condyle demonstrated 0 (SD=3) mm posterior translation during dynamic squatting from 0° to 120° flexion compared to 5 (SD=3) mm posterior translation during static squatting (P=0.01, Cohen's d=1.7). INTERPRETATION for squatting types of motions, static and dynamic study protocols appear to produce equivalent knee kinematics with no functionally important differences. Differences in medial condyle translations can be attributed to differences in foot position during the study. Investigators can choose the modality that best fits their goals and resources with the knowledge that the results for squatting activities are comparable.
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Affiliation(s)
- S Mu
- Department of Mechanical & Aerospace Engineering, University of Florida, Gainesville, Florida, USA
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He T, Mu S, Hao X, Zhou Y, Zhang J, Huang L, Yan C. [Alkaloids of Daphniphyllum angustifolium]. Zhongguo Zhong Yao Za Zhi 2010; 35:2999-3001. [PMID: 21355269] [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: 05/30/2023]
Abstract
The alkaloids of Daphniphyllum angustifolium were investigated. The whole plant was extracted with 95% EtOH, six alkaloids were isolated and purified with column chromatography over silica gel, RP-18 and Sephadex LH-20. Based on spectral analysis, their structures were identified as daphnilactone B (1), zwitterionic alkaloid (2), yuzurine (3), dehydrodaphnigracilline (4), deoxyyuzurimine (5) and macrodaphniphyllidine (6). All of compounds were obtained from the plant for the first time.
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Affiliation(s)
- Tao He
- College of Life Science, Guizhou University, Guiyang 550025, China
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Ge Y, Mu S, Zhang J, Wang Y, Sun Q, Hao X. [Diterpenoid alkaloids from roots of Aconitum recemulosum and their inhibitory effects on PAF-induced platelet aggregation]. Zhongguo Zhong Yao Za Zhi 2009; 34:1935-1937. [PMID: 19894538] [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: 05/28/2023]
Abstract
OBJECTIVE To study diterpenoid alkaloids from the roots of Aconitum recemulosum, and their inhibitory effects on PAF-induced platelet aggregation. METHOD The root of A. recemulosum was extracted with 95% EtOH. The total alkaloids extracted were isolated and purified by several kinds of column chromatography over silica gel, RP-18, and Sephadex LH-20, and identified based on spectral analysis. And the inhibitory effects of isolated compounds on PAF-induced platelet aggregation were detected. RESULT Five alkaloids were isolated and identified as sachaconitine (1), 14-acetylsachaconitine (2), hemsleyanine C (3), circinasine A (4), and talatisamine (5). The results showed compounds 1 and 2 have moderate inhibition effect on PAF. CONCLUSION Compounds 1-5 were firstly isolated from this plant. Furthermore, compounds 1 and 2 possessed moderate inhibitory effects on PAF-induced platelet aggregation.
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Affiliation(s)
- Yonghui Ge
- The College of Life Science, Guizhou University, Guiyang 550025, China.
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Yang J, Cai X, Mu S, Yang X. [Phenolic compounds from Galium aparine var. tenerum]. Zhongguo Zhong Yao Za Zhi 2009; 34:1802-1804. [PMID: 19894511] [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: 05/28/2023]
Abstract
OBJECTIVE To study the compounds from the whole plant of Galium aparine var. tenerum. METHOD The various column chromatographic techniques were applied to isolate the chemical constituents. MS, NMR and 2D-NMR spectroscopic techniques were uesd to identify chemical structures. RESULT Six compounds were isolated from the EtOAc-soluble part of the 95% ethanol extract of the plant, and their chemical structures were identified as 1-(4-hydroxyphenyl)-ethanone (1), vanillic acid (2), 3,4-dihydroxybenzoic acid (3), p-hydroxycinnamic acid (4), gallic acid (5), 4-hydroxytruxillic acid (6). CONCLUSION The NMR data of compound 6 were completely assigned by 2D-NMR techniques, including 1H-1H COSY, HMQC and HMBC spectra. This was the first time to report isolation of the compound 6 from natural product. The compounds 1-5 was isolated from the genus Galium for the first time.
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Affiliation(s)
- Juan Yang
- Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, China.
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Huang L, Mu S, Zhang J, Deng B, Song Z, Hao X. [Chemical constituents from involatile moiety of Pogostemon cablin]. Zhongguo Zhong Yao Za Zhi 2009; 34:410-413. [PMID: 19459301] [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: 05/27/2023]
Abstract
OBJECTIVE To study the chemical constituents of involatile moiety of Pogostemon cablin. METHOD Compounds were isolated and purified by repeated column chromatography, and their structures were elucidated by spectroscopic analysis. RESULT Nine compounds have been isolated and identified: epifriedelinol (1), 5-hydroxymethol-2-furfural (2), succinic acid (3), beta-sitosterol (4), daucosterol (5), crenatoside (6), 3'''-O-methylcrenatoside (7), isocrenatoside (8), and apigenin-7-O-beta-D-(6"-p-coumaryl)-glucoside (9). CONCLUSION Compounds 2, 3, 6-8 were isolated from Pogostemon genus for the first time.
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Affiliation(s)
- Liejun Huang
- Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, China.
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Tan C, Di Y, Wang Y, Wang Y, Mu S, Gao S, Zhang Y, Kong N, He H, Zhang J, Fang X, Li C, Lu Y, Hao X. Oldhamine A, a novel alkaloid from Daphniphyllum oldhami. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.03.126] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yang X, Mu S, Lv M, Li L, Wu Z. Endovascular treatment of huge dissecting aneurysms involving the basilar artery. Experience and lessons from two cases. Interv Neuroradiol 2008; 13:369-80. [PMID: 20566106 DOI: 10.1177/159101990701300408] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 11/12/2007] [Indexed: 11/16/2022] Open
Abstract
SUMMARY Dissecting aneurysms involving the basilar artery (BA) are lesions with significant morbidity and mortality. Their management is controversial and often difficult. There is no generally approved strategy. Two cases of huge dissections involving the BA presented with subarachnoid hemorrhage in one case and mass effect in both cases. The dissection of case 1 involved the upper two thirds of the BA distal to the anterior inferior cerebellar arteries (AICA). Another dissection of case 2 involved the bilateral vertebral arteries (VA) distal to bilateral PICA and extended to upper third of the BA. After making a basket with coils inside the pseudoaneursym, proximal dissection was totally occluded in case 1. Dissection on the bilateral VA distal to the bilateral PICA and proximal BA was occluded in case 2 with a small residual dissection on the left VA. Case 1 had an excellent recovery with a durable image and clinical result. But recanalization and regrowth occurred in case 2, which might have originated from the residual dissection on the left VA, induced acute mass effect and sudden coma six weeks after the initial treatment. The residual and regrown dissection had to be occluded in a second intervention. The patient died two days later. BA occlusion is safe and efficient for dissections involving the BA as in our case and the literature. Proximal occlusion might be enough for huge and long lesions like ours. It seems that completely dense packing of proximal dissection is the key point to prevent recanalization.
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Affiliation(s)
- X Yang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute, Capital Medical University, Beijing; China -
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Zhang Y, He H, Di Y, Mu S, Wang Y, Wang J, Li C, Kong N, Gao S, Hao X. Paxiphyllines A and B, new alkaloids from Daphniphyllum paxianum. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.10.136] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kanwal C, Mu S, Kern SE, Lim CS. Bidirectional on/off switch for controlled targeting of proteins to subcellular compartments. J Control Release 2004; 98:379-93. [PMID: 15312994 DOI: 10.1016/j.jconrel.2004.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2004] [Accepted: 05/20/2004] [Indexed: 01/21/2023]
Abstract
A regulatable fusion protein was constructed for controlling the localization of plasmid products. A ligand-inducible nuclear localization signal, nuclear export signal (NES) and a truncated form of the ligand binding domain of the progesterone receptor were attached to the desired protein. Enhanced green fluorescent protein (EGFP) was used as a model protein and its trafficking between the nucleus and cytoplasm was studied using fluorescence microscopy in response to the ligand, mifepristone. It was found that the protein trafficking into the nucleus was dose dependent with ligand concentration. Increasing the ligand dose from 1 to 100 nM enhanced import and reduced the rate of export of the fusion protein from the nucleus to the cytoplasm. This study demonstrates the feasibility of using an export signal and a ligand-inducible nuclear import signal as a bi-directional on/off switch with potential use for controlled targeting of therapeutic proteins to subcellular compartments.
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Affiliation(s)
- C Kanwal
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 421 Wakara Way #318, Salt Lake City, UT 84108, USA
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Luo S, Liu X, Mu S, Tsai SP, Wen CP. Asbestos related diseases from environmental exposure to crocidolite in Da-yao, China. I. Review of exposure and epidemiological data. Occup Environ Med 2003; 60:35-41; discussion 41-2. [PMID: 12499455 PMCID: PMC1740384 DOI: 10.1136/oem.60.1.35] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.8] [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: 11/03/2022]
Abstract
BACKGROUND Scattered patches of crocidolite, one form of asbestos, were found in the surface soil in the rural county of Da-yao in southwestern China. In 1983, researchers from the West China University of Medical Sciences (WCUMS) discovered that residents of two villages in Da-yao had hyperendemic pleural plaques and excessive numbers of pleural mesotheliomas. AIMS To review and summarise epidemiological studies, along with other relevant data, and to discuss the potential contribution to environmental risk assessment. METHODS This report is based on a review of several clinical/epidemiological studies conducted by WCUMS researchers since 1984, which included one cross sectional medical examination survey, one clinical/pathological analysis of 46 cases of mesothelioma, and three retrospective cohort mortality studies. Additional information acquired from reviewing original data first hand during a personal visit along with an interview of medical specialists from Da-yao County Hospital was also incorporated. RESULTS The prevalence of pleural plaque was 20% among peasants in Da-yao over 40 years of age in the cross sectional survey. The average number of mesothelioma cases was 6.6 per year in the 1984-95 period and 22 per year in the 1996-99 period, in a population of 68 000. For those mesothelioma cases that were histology confirmed, there were 3.8 cases/year in the first period and 9 cases/year in the second. Of the 2175 peasants in this survey, 16 had asbestosis. Lung cancer deaths were significantly increased in all three cohort studies. The annual mortality rate for mesothelioma was 85 per million, 178 per million, and 365 per million for the three cohort studies, respectively. The higher exposed peasants had a fivefold increased mesothelioma mortality compared to their lower exposed counterparts. There were no cases of mesothelioma in the comparison groups where no crocidolite was known to exist in the environment. In the third cohort study, almost one of five cancer deaths (22%) was from mesothelioma. The ratio of lung cancer to mesothelioma deaths was low for all three studies (1.3, 3.0, and 1.2, respectively). CONCLUSIONS The observation of numerous mesothelioma cases at Da-yao was a unique finding, due mainly to their lifetime exposure to crocidolite asbestos. The finding of cases dying at a younger age and the relatively high ratio of mesothelioma cases to lung cancer could also be another unique result of lifetime environmental exposure to crocidolite asbestos. Although the commercial use of crocidolite has been officially banned since 1984, the incidence of mesothelioma has continued to show a steady increase, particularly among peasants. Since the latency of mesothelioma is approximately 30-40 years, the ban had little effect in the 1990s. The increased awareness and changes in diagnosis over time may also contribute to the increase. Furthermore, exposure to asbestos stoves and walls continued. The government implemented reduction of these exposures. However, from a public health standpoint, the most important issue is the complete avoidance of further exposure to asbestos.
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Affiliation(s)
- S Luo
- Department of Occupational Health, School of Public Health, West China University of Medical Sciences, Chengdu, Sichuan, China
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Yoshida H, Hamano S, Senaldi G, Covey T, Faggioni R, Mu S, Xia M, Wakeham AC, Nishina H, Potter J, Saris CJ, Mak TW. WSX-1 is required for the initiation of Th1 responses and resistance to L. major infection. Immunity 2001; 15:569-78. [PMID: 11672539 DOI: 10.1016/s1074-7613(01)00206-0] [Citation(s) in RCA: 323] [Impact Index Per Article: 14.0] [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: 10/26/2022]
Abstract
WSX-1 is a class I cytokine receptor with homology to the IL-12 receptors. The physiological role of WSX-1, which is expressed mainly in T cells, was investigated in gene-targeted WSX-1-deficient mice. IFN-gamma production was reduced in isolated WSX-1(-/-) T cells subjected to primary stimulation in vitro to induce Th1 differentiation but was normal in fully differentiated and activated WSX-1(-/-) Th1 cells that had received secondary stimulation. WSX-1(-/-) mice were remarkably susceptible to Leishmania major infection, showing impaired IFN-gamma production early in the infection. However, IFN-gamma production during the later phases of the infection was not impaired in the knockout. WSX-1(-/-) mice also showed poorly differentiated granulomas with dispersed accumulations of mononuclear cells when infected with bacillus Calmette-Guerin (BCG). Thus, WSX-1 is essential for the initial mounting of Th1 responses but dispensable for their maintenance.
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Affiliation(s)
- H Yoshida
- The Amgen Institute, Toronto, Ontario M5G 2C1, Canada
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Feng YH, Zhou L, Zhao JY, Huang F, Mu S. [Effects on fiber regeneration following facial nerve transection treated with NOS antagonist]. Lin Chuang Er Bi Yan Hou Ke Za Zhi 2000; 14:415-8. [PMID: 12563916] [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: 02/28/2023]
Abstract
OBJECTIVE To elucidate the role of nitric oxide synthase antagonist, N-Nitro-L-Arginine Methyl Ester (L-NAME) in the regeneration of facial nerve following facial nerve transection. METHOD The facial nerves of 40 guinea pigs were exposed and a segment of the nerve at 3 mm length were excided. The two ends of the transected nerve were sutured and enveloped in a silicone tubule to form a regeneration chamber. L-NAME and saline were respectively injected into the regeneration chambers just after transection. The experiments were observed quantificational by the means of axon and myelin staining under light microscope. RESULT The findings in the work indicate that inhibition of NOS with L-NAME substantially better myelinated facial nerve regeneration than that associated with administration of saline. CONCLUSION L-NAME improve the regeneration of myelinated fibers. The mechanism seems to be related to the blockade of NO's neurotoxicity.
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Affiliation(s)
- Y H Feng
- Department of Otolaryngology Head and Neck Surgery, Renji Hospital, Affiliated to Shanghai Second Medical University, Shanghai 200001
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Wang X, Mu S, Ao J, Zhou G. [Acoustic densitometry for quantification of renal allografts microcirculation and microstructure]. Zhonghua Wai Ke Za Zhi 2000; 38:589-91. [PMID: 11832114] [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: 02/23/2023]
Abstract
OBJECTIVE To establish a new method for observing renal allografts microcirculation and microstructure with acoustic densitometry (integrated backscatter, contrast, second harmonics). METHODS 27 patients with renal allografts were investigated by Doppler, IBS, contrast and second harmonics. Renal allografts failed age in 5 patients 20-61 years. Intravenous injection of SHU-508A was given, compared with pre-injection by quantitative assessment of acoustic densitometry (AD) of renal microstructure. RESULTS There was a significant difference in the peak intensity, the area under the curve and the half-time of wash-out between pre-injection and injection contrast agent. The wish-in and wish-out curve was shown in a peak shape. The renal allografts with acute rejection were significantly lower than the control group in AD (P < 0.05). No contrast opacification of renal microstructure was present in 5 failed renal allografts and the wish-in and wish-out curve appeared in a straight line shape. CONCLUSION AD is safe, and efficient in assessing renal allografts microstructure. It more sensitive in detecting allograft complication such as rejection than Doppler.
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Affiliation(s)
- X Wang
- Department of Utrasound, General Hospital, People Liberation Army, Beijing 100853, China
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Yan XQ, Lacey DL, Saris C, Mu S, Hill D, Hawley RG, Fletcher FA. Ectopic overexpression of c-mpl by retroviral-mediated gene transfer suppressed megakaryopoiesis but enhanced erythropoiesis in mice. Exp Hematol 1999; 27:1409-17. [PMID: 10480432 DOI: 10.1016/s0301-472x(99)00069-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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: 11/17/2022]
Abstract
In this report, we tested whether ectopic overexpression of a cell surface receptor cDNA could be used to explore the physiological roles of that receptor. We generated c-mpl overexpressing animals by reconstituting mice with retroviral vector-transduced bone marrow (BM) cells. We observed that platelet counts in the c-mpl overexpressing mice failed to recover to normal levels and remained at <200 x 10(6)/mL post-transplantation, while platelet numbers in the control mice returned to > 800 x 10(6)/mL by 4 weeks post-transplantation. However, platelet counts in the c-mpl overexpressing mice could be stimulated to normal levels after administration of rhMGDF. No significant changes in peripheral leukocyte counts were observed, although the number of CFU-E, GM-CFC, and CFC-multi were reduced two- to threefold in the BM of the c-mpl overexpressing mice. In addition, enhanced erythropoiesis was observed in the c-mpl overexpressing mice. The mpl receptors on erythroid cells were functional as demonstrated by tyrosine-phosphorylation of mpl receptor on RBC and by in vitro erythroid colony-formation in response to MGDF stimulation, respectively. These results suggested that ectopically expressed mpl receptors competed for ligand in vivo leading to an insufficient amount of circulating thrombopoietin (Tpo) for the development of megakaryocytic lineage. These results further suggest that, in addition to sequestering circulating Tpo, overexpression of the mpl receptor on erythroid progenitors may directly contribute to enhanced erythropoiesis in vivo. Our studies demonstrate that ectopic overexpression of a receptor by retroviral-mediated gene transfer provides an approach to explore the biological roles of novel receptors.
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Affiliation(s)
- X Q Yan
- Department of Pathology, Amgen Inc., Thousand Oaks, CA 91320-1789, USA.
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Mu S, He Q, Chen Y. [Investigation and analysis of the diagnostic status of bronchial asthma]. Zhonghua Jie He He Hu Xi Za Zhi 1998; 21:601-3. [PMID: 11477877] [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: 02/20/2023]
Abstract
OBJECTIVE The aim of this study was to investigate the rate of delayed diagnosis of the bronchial asthma and related factors. METHOD 57 asthmatic outpatients were investigated randomly by questionnaire including main symptoms of asthmatic attack, the date of initial attack, the date of initial visit physician, and initial diagnosis, the basis of diagnosis and the names of misdiagnosed diseases. Then according to the above-mentioned data the duration of delayed diagnosis, the rate of delayed diagnosis were calculated. RESULT 96% of outpatients saw physician within 1 yr. after initial attack. The duration from initial visit to making diagnosis were 11.1 +/- 2.3, and 1.5 +/- 0.3 yr. before and after 1980, respectively, and their rate of delayed diagnosis were 75%, 15%, respectively. Both of their differences were statistically significant (P < 0.01). Only 20% of diagnosis of asthma was by pulmonary function test. CONCLUSION The majority of the delayed diagnosis should be due to making the mis-understanding and underattention of physician to the asthma, and their diagnostic levels should need further improving.
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Affiliation(s)
- S Mu
- Department of Respiratory Medicine, People's Hospital, Beijing Medical University, Beijing 100044
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