1
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Zheng WF, Chen J, Qi X, Huang Z. Modular and diverse synthesis of amino acids via asymmetric decarboxylative protonation of aminomalonic acids. Nat Chem 2023; 15:1672-1682. [PMID: 37973941 DOI: 10.1038/s41557-023-01362-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 10/06/2023] [Indexed: 11/19/2023]
Abstract
Stereoselective protonation is a challenge in asymmetric catalysis. The small size and high rate of transfer of protons mean that face-selective delivery to planar intermediates is hard to control, but it can unlock previously obscure asymmetric transformations. Particularly, when coupled with a preceding decarboxylation, enantioselective protonation can convert the abundant acid feedstocks into structurally diverse chiral molecules. Here an anchoring group strategy is demonstrated as a potential alternative and supplement to the conventional structural modification of catalysts by creating additional catalyst-substrate interactions. We show that a tailored benzamide group in aminomalonic acids can help build a coordinated network of non-covalent interactions, including hydrogen bonds, π-π interactions and dispersion forces, with a chiral acid catalyst. This allows enantioselective decarboxylative protonation to give α-amino acids. The malonate-based synthesis introduces side chains via a facile substitution of aminomalonic esters and thus can access structurally and functionally diverse amino acids.
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Affiliation(s)
- Wei-Feng Zheng
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Jingdan Chen
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
| | - Xiaotian Qi
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China.
| | - Zhongxing Huang
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Hong Kong, China.
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2
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Wang J, Zheng WF, Zhang X, Qian H, Ma S. Stereoselectivity control in Rh-catalyzed β-OH elimination for chiral allene formation. Nat Commun 2023; 14:7399. [PMID: 37968338 PMCID: PMC10651921 DOI: 10.1038/s41467-023-42660-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 10/18/2023] [Indexed: 11/17/2023] Open
Abstract
Stereoselectivity control and understanding in the metal-catalyzed reactions are fundamental issues in catalysis. Here we report sterically controlled rhodium-catalyzed SN2'-type substitution reactions of optically active tertiary propargylic alcohols with arylmetallic species affording the non-readily available enantioenriched tetrasubstituted allenes via either exclusive syn- or anti-β-OH elimination, respectively, under two sets of different reaction parameters. Detailed mechanistic experiments and density functional theory (DFT) studies reveal that the exclusive anti-Rh(I)-OH elimination is dictated by the simultaneous aid of in situ generated boric acid and ambient water, which act as the shuttle in the hydroxy relay to facilitate the Rh(I)-OH elimination process via a unique ten-membered cyclic transition state (anti-TS2_u). By contrast, the syn-Rh(III)-OH elimination in C-H bond activation-based allenylation reaction is controlled by a four-membered cyclic transition state (syn-TS3) due to the steric surroundings around the Rh(III) center preventing the approach of the other assisting molecules. Under the guidance of these mechanistic understandings, a stereodivergent protocol to construct the enantiomer of optically active tetrasubstituted allenes from the same starting materials is successfully developed.
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Affiliation(s)
- Jie Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China
| | - Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China
| | - Xue Zhang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, PR China.
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China.
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China.
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, PR China.
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3
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Ni J, Xia X, Zheng WF, Wang Z. Ti-Catalyzed Diastereoselective Cyclopropanation of Carboxylic Derivatives with Terminal Olefins. J Am Chem Soc 2022; 144:7889-7900. [PMID: 35442655 DOI: 10.1021/jacs.2c02360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Cyclopropanols and cyclopropylamines not only serve as important structural motifs in medicinal chemistry but also show diverse reactivities in organic synthesis. Owing to the high ring strain energy, the development of a general protocol from stable and readily available starting materials to afford these cyclopropyl derivatives remains a compelling challenge. Herein, we describe that a Ti-based catalyst can effectively promote the diastereoselective syntheses of cyclopropanols and cyclopropylamines from widely accessible carboxylic derivatives (acids, esters, amides) with terminal olefins. To the best of our knowledge, this method represents the first example of direct converting alkyl carboxylic acids into cyclopropanols. Distinct from conventional studies in Ti-mediated cyclopropanations with reactive alkyl Grignard reagents as nucleophiles or reductants, this protocol utilizes Mg and Me2SiCl2 to turn over the Ti catalyst. Our method exhibits broad substrate scope with good functional group compatibility and is amenable to late-stage synthetic manipulations of natural products and biologically active molecules.
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Affiliation(s)
- Jiabin Ni
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, Zhejiang, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
| | - Xiaowen Xia
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, Zhejiang, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
| | - Wei-Feng Zheng
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, Zhejiang, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
| | - Zhaobin Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, Zhejiang, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
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4
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Cui Y, Zhai Y, Xiao J, Li C, Zheng WF, Huang C, Wu G, Qin A, Lin J, Liu Q, Wang H, Wu P, Xu H, Zheng Y, Ma S. Chirality memory of α-methylene-π-allyl iridium species. Chem Sci 2021; 12:11831-11838. [PMID: 34659722 PMCID: PMC8442685 DOI: 10.1039/d1sc02636d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 05/13/2021] [Accepted: 07/20/2021] [Indexed: 11/21/2022] Open
Abstract
Chirality is one of the most important types of steric information in nature. In addition to central chirality, axial chirality has been catching more and more attention from scientists. However, although much attention has recently been paid to the creation of axial chirality and the chirality transfer of allenes, no study has been disclosed as to the memory of such an axial chirality. The reason is very obvious: the chiral information is stored over three carbon atoms. Here, the first example of the memory of chirality (MOC) of allenes has been recorded, which was realized via an optically active alkylidene-π-allyl iridium intermediate, leading to a highly stereoselective electrophilic allenylation with amines. Specifically, we have established the transition metal-mediated highly stereoselective 2,3-allenylation of amines by using optically active 2,3-allenyl carbonates under the catalysis of a nonchiral iridium(iii) complex. This method is compatible with sterically bulky and small substituents on both amines and 2,3-allenyl carbonates and furnishes the desired optically active products with a high efficiency of chirality transfer. Further mechanistic experiments reveal that the isomerization of the optically active alkylidene-π-allyl iridium intermediate is very slow. Chirality is one of the most important types of steric information in nature.![]()
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Affiliation(s)
- Yifan Cui
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China masm.fudan.edu.cn.,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yizhan Zhai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China masm.fudan.edu.cn.,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Junzhe Xiao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China masm.fudan.edu.cn.,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Can Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China masm.fudan.edu.cn.,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Chaofan Huang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Guolin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Anni Qin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Jie Lin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Qi Liu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China masm.fudan.edu.cn.,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Huanan Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Penglin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Haibo Xu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China masm.fudan.edu.cn.,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yangguangyan Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China masm.fudan.edu.cn.,Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Road Shanghai 200433 P. R. China
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5
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Huang C, Shi F, Cui Y, Li C, Lin J, Liu Q, Qin A, Wang H, Wu G, Wu P, Xiao J, Xu H, Yuan Y, Zhai Y, Zheng WF, Zheng Y, Yu B, Ma S. A palladium-catalyzed approach to allenic aromatic ethers and first total synthesis of terricollene A. Chem Sci 2021; 12:9347-9351. [PMID: 34349905 PMCID: PMC8278932 DOI: 10.1039/d1sc01896e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/04/2021] [Indexed: 11/30/2022] Open
Abstract
A palladium-catalyzed C-O bond formation reaction between phenols and allenylic carbonates to give 2,3-allenic aromatic ethers with decent to excellent yields under mild reaction conditions has been described. A variety of synthetically useful functional groups are tolerated and the synthetic utility of this method has been demonstrated through a series of transformations of the allene moiety. By applying this reaction as the key step, the total syntheses of naturally occurring allenic aromatic ethers, eucalyptene and terricollene A (first synthesis; 4.5 g gram scale), have been accomplished.
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Affiliation(s)
- Chaofan Huang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Fuchun Shi
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Yifan Cui
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Can Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Jie Lin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Qi Liu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Anni Qin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Huanan Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Guolin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Penglin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Junzhe Xiao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Haibo Xu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Yuan Yuan
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Yizhan Zhai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Yangguangyan Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Biao Yu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
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6
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Wang H, Liu CC, Bai FZ, Zhu J, Yan XX, Cao MD, Du LB, Wei DH, Wang DB, Liao XZ, Dong D, Gao Y, Dong P, Zhu C, Ma YL, Chai J, Xiao HF, Kong YX, Zhang Q, Zheng WF, Ying RB, Zhou H, Ren JS, Li N, Chen HD, Shi JF, Dai M. [Population's acceptance and attitude toward a novel fecal immunochemical test for colorectal cancer screening: a multi-center survey in China]. Zhonghua Yu Fang Yi Xue Za Zhi 2020; 54:760-767. [PMID: 32842299 DOI: 10.3760/cma.j.cn112150-20191218-00941] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the acceptance and attitude toward a novel fecal immunochemical test (FIT) in colorectal cancer screening among populations in China. Methods: From May 2018 to May 2019, 2 474 people aged 50-74 years were recruited from five provinces of China (Zhejiang, Anhui, Jiangsu, Hunan and Yunnan). The general demographic characteristics, acceptance of the new FIT technology and operational difficulties through the whole screening process were obtained through questionnaire survey. Multivariate logistic regression model was used to analyze the factors related to difficulties encountered in sampling stool, reading and uploading results. Results: The subjects were (60.0±6.4) years old, and female, high school of above educated, unemployed/retired/other, married and with medical insurance status of "new rural cooperative medical care (NRCMC)" accounted for 61.7% (1 526), 29.0%(718), 34.3% (849), 92.7% (2 293) and 31.3%(775), respectively. The population's acceptance of the FIT technology was 94.8%. In the process of FIT screening, the percentage of occurred difficulties in sampling stool, reading and uploading results were 33.1% (819), 46.4% (1 147) and 62.9% (1 557), respectively. The main difficulties were the uncertainty about whether the sampling operation was standard (28.0%), the inability to accurately judge the result displayed (32.5%) and the need for help without using a smartphone (44.2%). The results of multivariate logistic regression model analysis showed that people aged 65-74 years old and with medical insurance status of "NRCMC" were more likely to encounter difficulties in sampling, and those who were unemployed/retired/other and living with 3 or more family members were less likely to encounter difficulties in sampling. Those aged 65-74 years old, farmers or migrant workers, and those with "NRCMC" were more likely to encounter difficulties in readingresults, and those with 3 or more family members were less likely to encounter difficulties in reading result. Those with "NRCMC" were more likely to encounter difficulties in uploading results, and those with education level of high school or above, living with more than 3 family members were less likely to encounter difficulties in uploading results. Conclusion: The acceptance of the new FIT technology is relatively high among the subjects. Age, education level, occupation, number of family members living together and medical insurance status might be related to difficulties encountered in sampling stool, reading and uploading results, and it can be further strengthened in terms of the technology and characteristics of sub-populations.
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Affiliation(s)
- H Wang
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - C C Liu
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - F Z Bai
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Zhu
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - X X Yan
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - M D Cao
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L B Du
- Institute of Cancer and Basic Medicine, Chinese Academy of Sciences/ Department of Cancer Prevention,Cancer Hospital of the University of Chinese Academy of Sciences/ Department of Cancer Prevention,Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - D H Wei
- Office for Cancer Prevention and Control, Anhui Provincial Cancer Hospital, Hefei 230032, China
| | - D B Wang
- School of Health Services Management, Anhui Medical University, Hefei 230032, China
| | - X Z Liao
- The Department of Cancer Prevention and Control, Hunan Provincial Cancer Hospital, Changsha 410006, China
| | - D Dong
- Office of Cancer Prevention and Treatment, Xuzhou Cancer Hospital, Xuzhou 221000, Jiangsu Province, China
| | - Y Gao
- Department of Colorectal Surgery, Department of Tumor Hospital of Yunnan Province/Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - P Dong
- Department of Public Health Strategy Research, Institute of Medical Information, Chinese Academy of Medical Sciences, Beijing 100020, China
| | - C Zhu
- Institute of Cancer and Basic Medicine, Chinese Academy of Sciences/ Department of Cancer Prevention,Cancer Hospital of the University of Chinese Academy of Sciences/ Department of Cancer Prevention,Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Y L Ma
- Office for Cancer Prevention and Control, Anhui Provincial Cancer Hospital, Hefei 230032, China
| | - J Chai
- School of Health Services Management, Anhui Medical University, Hefei 230032, China
| | - H F Xiao
- The Department of Cancer Prevention and Control, Hunan Provincial Cancer Hospital, Changsha 410006, China
| | - Y X Kong
- Office of Cancer Prevention and Treatment, Xuzhou Cancer Hospital, Xuzhou 221000, Jiangsu Province, China
| | - Q Zhang
- Department of Cancer Prevention, Department of Tumor Hospital of Yunnan Province/ Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - W F Zheng
- Department of Proctology, Lanxi Red Cross Hospital, Lanxi 321100, Zhejiang Province, China
| | - R B Ying
- Department of Surgical Oncology, Taizhou Cancer Hospital, Taizhou 317502, Zhejiang Province, China
| | - H Zhou
- Administrative Management Office, Yunnan Cancer Hospital/ The Third Affiliated Hospital of Kunming Medical University/ Yunnan Cancer Center, Kunming 650118, China
| | - J S Ren
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - N Li
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - H D Chen
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J F Shi
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - M Dai
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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7
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Wang H, Luo H, Zhang ZM, Zheng WF, Yin Y, Qian H, Zhang J, Ma S. Pd-Catalyzed Enantioselective Syntheses of Trisubstituted Allenes via Coupling of Propargylic Benzoates with Organoboronic Acids. J Am Chem Soc 2020; 142:9763-9771. [DOI: 10.1021/jacs.0c02876] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Huanan Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
| | - Hongwen Luo
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
| | - Zhan-Ming Zhang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
| | - Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
| | - Yu Yin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
| | - Junliang Zhang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, PR China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, PR China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, PR China
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8
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Wang J, Zhang W, Wu P, Huang C, Zheng Y, Zheng WF, Qian H, Ma S. Chiral tertiary propargylic alcohols via Pd-catalyzed carboxylative kinetic resolution. Org Chem Front 2020. [DOI: 10.1039/d0qo01106a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A highly efficient Pd/H+-cocatalyzed kinetic resolution reaction of tertiary propargylic alcohols has been reported.
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Affiliation(s)
- Jie Wang
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Wanli Zhang
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Penglin Wu
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Chaofan Huang
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Yangguangyan Zheng
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
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9
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Zheng WF, Zhang W, Huang C, Wu P, Qian H, Wang L, Guo YL, Ma S. Tetrasubstituted allenes via the palladium-catalysed kinetic resolution of propargylic alcohols using a supporting ligand. Nat Catal 2019. [DOI: 10.1038/s41929-019-0346-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Zheng WF, Zhang SY, Ma HF, Chang XW, Wang H. C1qTNF-related protein-6 protects against doxorubicin-induced cardiac injury. J Cell Biochem 2019; 120:10748-10755. [PMID: 30719766 DOI: 10.1002/jcb.28366] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 11/29/2018] [Indexed: 12/11/2022]
Abstract
The clinical use of doxorubicin (DOX) is limited by its toxic effect. However, there is no specific drug that can prevent DOX-related cardiac injury. C1qTNF-related protein-6 (CTRP6) is a newly identified adiponectin paralog with many protective functions on metabolism and cardiovascular diseases. However, little is known about the effect of CTRP6 on DOX-induced cardiac injury. The present study aimed to investigate whether CTRP6 could protect against DOX-related cardiotoxicity. To induce acute cardiotoxicity, the mice were intraperitoneally injected with a single dose of DOX (15 mg/kg). Cardiomyocyte-specific CTRP6 overexpression was achieved using an adenoassociated virus system at 4 weeks before DOX injection. The data in our study demonstrated that CTRP6 messenger RNA and protein expression were decreased in DOX-treated hearts. CTRP6 attenuated cardiac atrophy induced by DOX injection and inhibited cardiac apoptosis and improved cardiac function in vivo. CTRP6 also promoted the activation of protein kinase B (AKT/PKB) signaling pathway in DOX-treated mice. CTRP6 prevented cardiomyocytes from DOX-induced apoptosis and activated the AKT pathway in vitro. CTRP6 lost its protection against DOX-induced cardiac injury in mice with AKT inhibition. In conclusion, CTRP6 protected the heart from DOX-cardiotoxicity and improves cardiac function via activation of the AKT signaling pathway.
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Affiliation(s)
- Wei-Feng Zheng
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, China
| | - Shou-Yan Zhang
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, China
| | - Hui-Fang Ma
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, China
| | - Xue-Wei Chang
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, China
| | - Hao Wang
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, China
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11
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Zheng WF, Sun GJ, Chen L, Kang Q. Enantioselective Synthesis of trans
-Vicinal Diamines via
Rhodium-Catalyzed [2+2] Cycloaddition of Allenamides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800021] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Wei-Feng Zheng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
| | - Gui-Jun Sun
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
| | - Liang Chen
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
| | - Qiang Kang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
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12
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Zheng WF, Ji TT, Lin Y, Li RZ. The prognostic value of lymph nodes count on survival of patients with node-negative gastric cancer. Oncotarget 2018; 7:43680-43688. [PMID: 27270656 PMCID: PMC5190052 DOI: 10.18632/oncotarget.9845] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 03/17/2016] [Accepted: 05/20/2016] [Indexed: 12/12/2022] Open
Abstract
The retrieved lymph node (LN) count has been validated as a prognostic factor in various cancers. However, the interaction between LN counts and patients' prognosis in gastric cancer with negative-LN metastasis is not fully studied. Surveillance, Epidemiology, and End Results Program (SEER)-registered gastric cancer patients were used for analysis in this study. Patients operated on for gastric cancer at N0 stage between 2004 and 2012 were identified from the SEER database. The association between the LN counts and survival was assessed using the Cox proportional hazards model. Patients were stratified into 1–4, 5−13, and > 13 subgroups according to LN count cut-off values determined by X-tile program, with the 5-year cause specific survival (CSS) rate of 64.8%, 72.5%, and 79.4%, respectively. LN count was also validated as an independently prognostic factor in multivariate Cox analysis (P < 0.001). In addition, nomograms including LN counts on CSS were established according to all significant factors, and the c-index was 0.703 (95% CI: 0.672−0.734). Further study indicated that patients with no LN metastasis had a decreased risk of death for each patient with LN examined up to approximately 14 LNs. Collectively, our study firmly demonstrated that the number of the retrieved LNs count was an independent prognostic factor for gastric cancer with no LN metastasis. The higher the LN count, the better the survival would be; the best CSS was observed on the LN count more than 14.
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Affiliation(s)
- Wei-Feng Zheng
- Department of Gastroenterology, Rui'an People's Hospital, Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325200, Zhejiang Province, China
| | - Ting-Ting Ji
- Department of Gastroenterology, Rui'an People's Hospital, Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325200, Zhejiang Province, China
| | - Yong Lin
- Department of Gastroenterology, Rui'an People's Hospital, Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325200, Zhejiang Province, China
| | - Rong-Zhou Li
- Department of Gastroenterology, Rui'an People's Hospital, Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325200, Zhejiang Province, China
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13
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Chang XW, Zhang SY, Wang H, Zhang MM, Zheng WF, Ma HF, Gu YF, Wei JH, Qiu CG. Combined value of red blood cell distribution width and global registry of acute coronary events risk score on predicting long-term major adverse cardiac events in STEMI patients undergoing primary PCI. Oncotarget 2018; 9:13971-13980. [PMID: 29568409 PMCID: PMC5862630 DOI: 10.18632/oncotarget.24128] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 08/23/2017] [Accepted: 12/03/2017] [Indexed: 12/22/2022] Open
Abstract
The combined value of RDW and GRACE risk score for cardiovascular prognosis in ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI) has not been fully investigated. This study was designed to explore the combined value of RDW and GRACE risk score on predicting long-term major adverse cardiac event (Mace) in STEMI patients undergoing primary PCI. This study included 390 STEMI patients. The primary endpoint at the (33.5 ± 7.1) months follow-up was composed of cardiac death and nonfatal myocardial infarction. The relationship between clinical parameters and clinical outcomes was evaluated using Cox regression model and receiver operating characteristic (ROC) analysis. Mace occurred in 126 (32.3%) patients including 54 (13.8%) cardiac deaths and 72 (18.5%) nonfatal myocardial infarctions. Patients in Mace group had significantly higher RDW and GRACE score than the patients in non-Mace group. According to the Cox model, RDW and GRACE score were the most important independent predictors of Mace and cardiac death. The best cut-off value for RDW to predict the occurrence of primary events was 13.25% (AUC = 0.694, 95% CI:0.639–0.750, P < 0.001) and that for GRACE score was 119.5 (AUC = 0.721, 95% CI:0.666–0.777, P < 0.001). The combination of RDW and GRACE score were more valuable (AUC = 0.775, 95% CI: 0.727–0.824, P < 0.001). Kaplan–Meier analysis provided significant prognostic information with the highest risk for cardiac death (Log-Rank χ2 = 24.684, P < 0.001) in group with both high RDW (> 13.25%) and high GRACE score (> 119.5). The combination of RDW level and GRACE score may be valuable and simple independent predictors of Mace and cardiac death in STEMI patients undergoing primary PCI. They may be useful tools for risk stratification and may indicate long-term clinical outcomes.
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Affiliation(s)
- Xue-Wei Chang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.,Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471009, China
| | - Shou-Yan Zhang
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471009, China
| | - Hao Wang
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471009, China
| | - Ming-Ming Zhang
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471009, China
| | - Wei-Feng Zheng
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471009, China
| | - Hui-Fang Ma
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471009, China
| | - Yun-Fei Gu
- Department of Cardiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471009, China
| | - Jing-Han Wei
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Chun-Guang Qiu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
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14
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Abstract
The first example of Pd-catalyzed carboxylation of propargylic alcohols in the presence of CO (1 atm) and water affording 2,3-allenoic acids has been developed.
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Affiliation(s)
- Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Wanli Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- College of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- 200062
| | - Jianhao Huang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yibo Yu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
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15
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Bora PP, Sun GJ, Zheng WF, Kang Q. Rh/Lewis Acid Catalyzed Regio-, Diastereo- and Enantioselective Addition of 2-Acyl Imidazoles with Allenes. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201700596] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Pranjal P. Bora
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology; Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences; 155 Yangqiao Road West, Fuzhou Fujian 350002 China
| | - Gui-Jun Sun
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology; Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences; 155 Yangqiao Road West, Fuzhou Fujian 350002 China
| | - Wei-Feng Zheng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology; Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences; 155 Yangqiao Road West, Fuzhou Fujian 350002 China
| | - Qiang Kang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology; Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences; 155 Yangqiao Road West, Fuzhou Fujian 350002 China
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16
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Affiliation(s)
- Wei-Feng Zheng
- Key
Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, People’s Republic of China
- College
of Materials Science and Engineering, Fujian Normal University, 8 Shangsan Road, Fuzhou 350007 People’s Republic of China
| | - Qiu-Jing Xu
- College
of Materials Science and Engineering, Fujian Normal University, 8 Shangsan Road, Fuzhou 350007 People’s Republic of China
| | - Qiang Kang
- Key
Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, People’s Republic of China
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17
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Abstract
A highly regio- and stereoselective Rh-catalyzed intermolecular head-to-head [2 + 2] cycloaddition of allenamides was developed. The intermolecular cycloadducts, trans-dimethylenecyclobutane-1,2-diamine derivatives, were achieved in good yields with high regioselectivity and stereoselectivity.
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Affiliation(s)
- Wei-Feng Zheng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West, Fuzhou 350002, China.,College of Materials Science and Engineering, Fujian Normal University , Fuzhou 350007, China
| | - Pranjal Protim Bora
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West, Fuzhou 350002, China
| | - Gui-Jun Sun
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West, Fuzhou 350002, China
| | - Qiang Kang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West, Fuzhou 350002, China
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18
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Andersen AS, Zheng WF, Sutherland DS, Jiang XY. Versatile multiple protein nanopatterning within a microfluidic channel for cell recruitment studies. Lab Chip 2015; 15:4524-4532. [PMID: 26527486 DOI: 10.1039/c5lc00916b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel approach combining self-assembly-based colloidal lithography and polydimethylsiloxane (PDMS) micromolding to generate complex protein nanopatterns for studying the mechanisms of leukocyte extravasation within microchannels is presented. Nanostructured surfaces sealed onto PDMS-molded microchannels are chemically functionalized in situ in an all-aqueous process to generate bi-functional chemical nanopatterns. Subsequent co-immobilization with proteins makes use of common non-covalent coupling (e.g. HIS-tags, FC-tags and biotin-tags), giving nanopatterns of arbitrary combinations of oriented, functional proteins. Up to three different proteins were simultaneously co-immobilized into the microchannel with nanoscale precision, demonstrating the complex patterns. As a proof-of-principle, a mimic of an inflamed endothelium was constructed using a macro- and nanoscale pattern of intercellular adhesion molecule 1 (ICAM1) and P-selectin, and the response of leukocytes through live cell imaging was measured. A clear result on the rolling behavior of the cells was observed with rolling limited to areas where ICAM1 and P-selectin are present. This micro/nano-interface will open new doors to investigations of how spatial distributions of proteins control cellular activity.
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Affiliation(s)
- A S Andersen
- Interdisciplinary Nanoscience Center (iNANO), Århus University, Gustav Wieds Vej 14, 8000 Århus, Denmark
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19
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Li SB, Yang F, Jing L, Ma J, Jia YD, Dong SY, Zheng WF, Zhao LS. Correlation between plasma lipoprotein-associated phospholipase A 2 and peripheral arterial disease. Exp Ther Med 2013; 5:1451-1455. [PMID: 23737897 PMCID: PMC3671896 DOI: 10.3892/etm.2013.1005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 01/28/2013] [Indexed: 01/14/2023] Open
Abstract
Lipoprotein-associated phospholipase A2 (Lp-PLA2) is a recently identified and potentially useful plasma biomarker for cardiovascular diseases. However, its role in peripheral arterial disease (PAD) remains unclear. The objective of this study was to assess the independent association of Lp-PLA2 and other inflammatory markers with the reduced ankle-brachial blood pressure index (ABI), a marker of PAD. We performed a cross-sectional study in 982 individuals aged ≥40 years who were recruited from the First Affiliated Hospital of Zhengzhou University. PAD was defined as an ABI <0.9 in at least one leg. The individuals were further divided into two groups, 145 with PAD and 837 without PAD. Following adjustment for traditional cardiovascular risk factors, the odds ratios of PAD when comparing the highest to the lowest quartiles were 3.24 (95% CI, 1.68–3.94) for Lp-PLA2, 2.14 (95% CI, 1.07–3.11) for homocysteine, 1.93 (95% CI, 1.02–4.01) for fibrinogen, 2.26 (95% CI, 1.32–5.74) for apolipoprotein B and 1.3 (95% CI, 0.75–2.49) for high-sensitivity C-reactive protein (hsCRP). When Lp-PLA2 and inflammatory markers were simultaneously included in the full model, the corresponding odds ratios were 1.81 (95% CI, 1.14–3.68) for Lp-PLA2, 1.15 (95% CI, 0.49–2.69) for homocysteine, 1.21 (95% CI, 0.88–5.57) for fibrinogen, 0.98 (95% CI, 0.51–3.85) for apolipoprotein B and 1.23 (95% CI, 1.12–3.51) for hsCRP. Lp-PLA2 levels were significantly and independently associated with PAD following adjustment for other inflammatory markers. These findings reflect the potential role of circulating Lp-PLA2 as a marker of atherosclerosis.
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Affiliation(s)
- Shuai-Bing Li
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Henan 450052, P.R. China
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20
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Tan RX, Lu H, Wolfender JL, Yu TT, Zheng WF, Yang L, Gafner S, Hostettmann K. Mono- and sesquiterpenes and antifungal constituents from Artemisia species. Planta Med 1999; 65:64-67. [PMID: 10083848 DOI: 10.1055/s-1999-13965] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In addition to beta-sitosterol and alpha-amyrin detected in all the investigated species, the extract of the aerial parts of Artemisia giraldii var. giraldii gave stigmasterol, daucosterol, sesamine, luteolin, eupafolin, hispidulin, eupatilin, belamcanidin, pinitol, artemin, ridentin, and a new antifungal monoterpene (named santolinylol) while that of the aerial parts of A. mongolica afforded sesamine, eupafolin, eupatilin, matricarin, and a new germacranolide (3-oxo-11 alpha H-germacra-1(10)E,4Z-dien-12,6 alpha-olide), and that of the aerial parts of A. vestita yielded stigmasterol, daucosterol, umbelliferone, scopolin, scoparone, and isoscopoletin-O-glucoside. Pinitol, first reisolated from Artemisia genus, was shown to inhibit the growth of the human pathogenic fungi Candida albicans, Aspergillus flavus, A. niger, Geotrichun candidum, Trichophyton rubrum, and Epidermophyton floccosum. Umbelliferone was also active against Candida tropicalis, A. flavus, G. candidum, T. rubrum, and E. floccosum. The flavones hispidulin and belamcanidin were almost equally inhibitory to the growth of A. flavus, G. candidum, T. rubrum, and E. floccosum, and santolinylol to C. albicans, A. flavus, A. niger, G. candidum, T. rubrum, and E. floccosum. In addition, ridentin was active against the growth of the plant pathogenic fungus Cladosporium cucumerinum.
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Affiliation(s)
- R X Tan
- Department of Biological Science & Technology, Nanjing University, People's Republic of China.
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21
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Abstract
Eleven compounds including four triterpenes, one sterol, and six diterpenes from E kansui had been assayed for their cytotoxicity and activiral activity. The relations between structures and bioactivities have also been noted.
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22
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Abstract
Artemisia species, widespread in nature, are frequently utilized for the treatment of diseases such as malaria, hepatitis, cancer, inflammation, and infections by fungi, bacteria, and viruses. Furthermore, some Artemisia constituents were found to be potential insecticides and allelopathic chemicals. This genus is receiving growing attention presumably due to: (i) the diversified biology and chemistry of the constituents, (ii) the frequent application in traditional medical practice, and (iii) the rich source of the plant material. This review summarizes mainly the biological results obtained in the past decade. The significance and trends in this field are briefly discussed.
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Affiliation(s)
- R X Tan
- Department of Biological Science & Technology, Nanjing University, P. R. China
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23
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Tan RX, Zheng WF, Tang HQ. Biologically active substances from the genus Artemisia. Planta Med 1998. [PMID: 9619108 DOI: 10.1055/s–2006–957438] [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: 05/08/2023]
Abstract
Artemisia species, widespread in nature, are frequently utilized for the treatment of diseases such as malaria, hepatitis, cancer, inflammation, and infections by fungi, bacteria, and viruses. Furthermore, some Artemisia constituents were found to be potential insecticides and allelopathic chemicals. This genus is receiving growing attention presumably due to: (i) the diversified biology and chemistry of the constituents, (ii) the frequent application in traditional medical practice, and (iii) the rich source of the plant material. This review summarizes mainly the biological results obtained in the past decade. The significance and trends in this field are briefly discussed.
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Affiliation(s)
- R X Tan
- Department of Biological Science & Technology, Nanjing University, P. R. China
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24
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Abstract
Two new flavones, 4',6,7-trihydroxy-3',5'-dimethoxy-flavone (2) and 5',5- dihydroxy-3',4',8-trimethoxyflavone (3) were isolated from Artemisia giraldii and their structures were identified by spectroscopic methods. These two new flavones showed antibiotic activity against Staphylococcus aureus, Sarcina lutea, Escherichia coli, Pseudomonas aeruginosa, Proteus sp. Aspergillus flavus, and Trichoderma viride.
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Affiliation(s)
- W F Zheng
- Department of Biological Science and Technology, Nanjing University, People's Republic of China
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25
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Yu W, Xie YZ, Jiang M, Zheng WF, Wang LH, Wang YZ, Xing SZ. CT detection of wrist bone erosion in rheumatoid arthritis. Chin Med J (Engl) 1993; 106:509-13. [PMID: 8243122] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
A correlative radiographic and CT study of the wrists of 30 patients with rheumatoid arthritis (RA) was reported. The results showed that sensitivity of CT in detecting wrist erosion is superior to that of conventional radiograph. Accordingly, wrist CT scanning is useful for early diagnosis of RA.
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Affiliation(s)
- W Yu
- Department of Radiology, PUMC Hospital, Beijing
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26
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Zheng YT, Ben KL, Zheng WF. [Comparative study of TRBC receptor and E receptor on T lymphocytes of human and macaque]. Shi Yan Sheng Wu Xue Bao 1990; 23:51-6. [PMID: 1974378] [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: 12/29/2022]
Abstract
In 1985, rosette formation of human and macaque pan-T lymphocytes with tree shrew red blood cells (TRBC) (TRBC rosette) was first found by Ben K et al, showing different physico-chemical properties from that of rosette formation with sheep red blood cells (E-rosette). In order to approach the correlation between TRBC receptor, E receptor (CD2) and other differentiation antigens (CDs) on T lymphocytes, rosette inhibition assay and antigenic modulation or co-modulation were performed with monoclonal antibodies (McAbs) to CDs, and the distribution of TRBC receptor in other peripheral immunocytes, cell lines was also examined. TRBC rosette appeared in 88.8% of E rosette positive peripheral blood lymphocytes (E(+)-PBL) and in 4.16% of E(-)-PBL. TRBC receptor was also found on all T cell lines tested (CEM, H33 HJ-JA 1, Jurkat, MLA-144, Molt-3, Molt-4, Molt-4 clone 8, PEER) and some myeloid lines (U 937 and HL 60), but not on human granulocytes, B cell lines (Daudi, Raji and Reh) and myeloid line K 562. The modulation or co-modulation of CD 3, TCR, CD 5, CD 6 and CD 7 with McAbs OKT 3, T 108 (F 1), T 136 (F 101-15), T 149 (M-T 604) and T 152 (7 G 5) did not affect TRBC rosette formation of PBL. TRBC rosette of human and rhesus monkey PBL was not inhibited by T 11.1 McAb OKT 11 (CD 2 McAb), in contrast human and rhesus monkey E rosette formations were obviously blocked at inhibition rates of 77.9% and 49.3%, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- Y T Zheng
- Kunming Institute of Zoology, Academia Sinica
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27
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Wang L, Zheng WF. Measurement and clinical significance of thyroid microsomal and thyroglobulin antibodies by enzyme-linked immunosorbent assay. Chin Med J (Engl) 1989; 102:282-9. [PMID: 2507242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Using the thyroid microsomal antigen(TMAg) prepared by affinity chromatography gel filtration method of sufficient purity, we measured the TM antibody (TMAb) level by an enzyme-linked immunosorbent assay (ELISA) in 103 normal persons and 183 patients with various thyroid disorders (Hashimoto's thyroiditis, Graves' disease, hypothyroidism, subacute thyroiditis, thyroid cancer, thyroid adenoma and simple goiter). The thyroglobulin antibody (TCAb). T3 and T4 were also measured at the same time. Based on the measurement of TMAb and TGAb of the thyroid diseases and analysis of their incidences and titer, our data strongly support that ELISA using purified TM and TG is a very useful and promising method for diagnosis and distinguishing autoimmune from non-autoimmune thyroid disease, and also can be employed in monitoring the development and studying the pathogenesis of the disease. We found that there is a negative correlation between TMAb titer and T3, T4 values (P less than 0.01) which has not been reported before in the literature. According to the result of the study, we suggest an immunological classification of thyroid diseases.
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Abstract
The effect of pharmacologic doses of sex hormones on NK and ADCC activity against YAC-1 lymphoma and CRBC target cells was studied. Estradiol (E) and testosterone (T) administration for 2 weeks caused a substantial reduction of splenic NK activity in TA3 mice of either sex. In prolonging the treatment time, the intensity of suppression was gradually increased. Both E and T have apparently no inhibitory effect on ADCC activity of TA3 mice, although the ADCC activity slightly increased in the early stage of T treatment. The ADCC activity of T-treated male mice was slightly higher than that of E-treated males. Passive transfer of the splenic mononuclear cells and serum of treated mice does not affect the NK and ADCC activity of normal recipient mice. Addition of different concentrations of sex hormones into the culture medium or pre-treatment of effector cells for 12h failed to change the NK and ADCC activity of murine splenic cells.
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Affiliation(s)
- J Hou
- Department of Immunology, Tianjin Medical College, People's Republic of China
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29
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Wang L, Zheng WF. An affinity chromatography-gel filtration device for preparing thyroid microsomal antigen. J Immunol Methods 1987; 102:221-6. [PMID: 3655374 DOI: 10.1016/0022-1759(87)90080-9] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
On the basis of conventional differential centrifugation for preparing crude thyroid microsomal antigen (TMAg), we have employed Sepharose 4B gel filtration and affinity chromatography separately to study the elution pattern in terms of absorbance and antigenic activity. The result indicates that thyroglobulin (TG) exists in two forms in crude TMAg, i.e., 'free TG' and 'membrane-bound TG'. TMAg is present in two forms in the eluate: (1) the TM fragment or TMAg polymer, which is produced at a higher rate and has greater antigenic activity, but which is less pure; (2) soluble TMAg, which is produced at a lower rate and has less antigenic activity, but which is more pure. We have developed an affinity chromatography-gel filtration (AC-GF) device which is a combination of affinity chromatography and a Sepharose 4B column. Sephadex G-50 is placed between the rubber stopper and Sepharose 4B in the GF column to ensure intactness of the entire system. With such a device, the AC removes the contaminated TG from TM homogenate, and allows the latter to pass directly from AC to GF for rechromatography. This device extracts the full advantages of both methods and each compensates for any deficiency of the other. Using this one-step procedure, one has the greatest chance of removing TG and obtaining TM fragments of TMAg polymers of higher antigenic activity, as well as separating small amounts of more purified soluble TMAg. Thus, the newly developed method meets the need of large quantities of TMAg for practical application, and at the same time the more purified preparations can be used for analytical purposes.
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Affiliation(s)
- L Wang
- Department of Immunology, Tianjin Medical College, China
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30
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Abstract
A non-isotope method, hemoglobin-enzyme release assay (Hb-ERA), for measuring antibody-dependent cell-mediated cytotoxicity (ADCC) has been successfully developed. The assay is based on the fact that hemoglobin has peroxidase activity capable of catalyzing the oxidation of o-phenylenediamine to give coloration which can be measured by spectrophotometer. In comparison to the conventional 51Cr release assay, Hb-ERA is economic, sensitive, reproducible and does not have the shortcomings associated with manipulation of radioactive substances. It is applicable in clinical and research laboratories of any scale. The optimum conditions for the assay are as follows: an effector cell: target cell ratio of 10:1 and an incubation period of 14-16 h at 37 degrees C in 5% CO2. The splenic ADCC activity of mice was measured. The cytotoxic index of mice aged 10-14 weeks (39.71 +/- 11.19) was significantly higher than that of 20-24 week-old mice (18.42 +/- 10.31) (P less than 0.001). The ADCC activity is not influenced by sex. The merits and drawbacks of Hb-ERA are objectively evaluated.
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31
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Zheng WF, Tian EJ, Sui ZF, Wang RF. Serum C1q assay in infectious hepatitis. Chin Med J (Engl) 1984; 97:137-40. [PMID: 6432468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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32
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Zheng WF, Tian EJ, Sui ZF, Ye XJ, Zhang GY. Enzyme linked immunosorbent antibody detection of immunoglobulin in pregnant women. Chin Med J (Engl) 1983; 96:926-8. [PMID: 6426888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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