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Yu Y, Lin J, Qin A, Wang H, Wang J, Wang W, Wu G, Zhang Q, Qian H, Ma S. Relay Catalysis for Selective Aerobic Oxidative Esterification of Primary Alcohols with Methanol. Org Lett 2024. [PMID: 38619221 DOI: 10.1021/acs.orglett.4c01059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Esters are bulk and fine chemicals and ubiquitous in polymers, bioactive compounds, and natural products. Their traditional synthetic approach is the esterification of carboxylic acids or their activated derivatives with alcohols. Herein, a bimetallic relay catalytic protocol was developed for the aerobic esterification of one alcohol in the presence of a slowly oxidizing alcohol, which has been identified as methanol. A concise synthesis of phlomic acid was executed to demonstrate the practicality and potential of this reaction.
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Affiliation(s)
- Yibo Yu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, 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
| | - 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
| | - Jie Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Weiyi 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
| | - Qian Zhang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, 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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Ma S, Zheng S, Zhang W, Chen D, Pan F. Correction to "Algebraic Graph-Based Machine Learning Model for Li-Cluster Prediction". J Phys Chem A 2024; 128:2680. [PMID: 38527789 DOI: 10.1021/acs.jpca.4c01387] [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: 03/27/2024]
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Zhang J, Luo Y, Zheng E, Huo X, Ma S, Zhang W. Synergistic Pd/Cu-Catalyzed 1,5-Double Chiral Inductions. J Am Chem Soc 2024; 146:9241-9251. [PMID: 38502927 DOI: 10.1021/jacs.4c00497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Much attention has been focused on the catalytic asymmetric creation of single chiral centers or two adjacent stereocenters. However, the asymmetric construction of two nonadjacent stereocenters is of significant importance but is challenging because of the lack of remote chiral induction models. Herein, based on a C═C bond relay strategy, we report a synergistic Pd/Cu-catalyzed 1,5-double chiral induction model. All four stereoisomers of the target products bearing 1,5-nonadjacent stereocenters involving both allenyl axial and central chirality could be obtained divergently by simply changing the combination of two chiral catalysts with different configurations. Control experiments and DFT calculations reveal a novel mechanism involving 1,5-oxidative addition, contra-thermodynamic η3-allyl palladium shift, and conjugate nucleophilic substitution, which play crucial roles in the control of reactivity, regio-, enantio-, and diastereoselectivity. It is expected that this C═C bond relay strategy may provide a general protocol for the asymmetric synthesis of structural motifs bearing two distant stereocenters.
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Affiliation(s)
- Jiacheng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yicong Luo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - En Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xiaohong Huo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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Lin J, Jia M, Song X, Yu H, Ma S. Pd-Catalyzed Enantioselective Creation of All-Carbon Quaternary Center with 2,3-Allenylic Carbonates. Org Lett 2024. [PMID: 38489519 DOI: 10.1021/acs.orglett.2c02497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024]
Abstract
Enantioselective construction of all-carbon quaternary centers has been achieved via the palladium-catalyzed highly enantioselective allenylation of oxindoles with 2,3-allenylic carbonates to afford a variety of optically active allene products, which contain oxindole units with different functional groups, in high ee. The corresponding synthetic applications have also been demonstrated.
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Affiliation(s)
- Jie Lin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Minqiang Jia
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Xu Song
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Hao Yu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, 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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Li JX, Li ZJ, Zhang HM, Xu SS, Quan RZ, Zhang H, Lu MM, Wang XY, Ma S, Mi J, Ding H, Li XL. [The association between portal vein thrombosis and rebleeding after non-urgent endoscopic treatment of esophagogastric varices]. Zhonghua Yi Xue Za Zhi 2024; 104:682-689. [PMID: 38418167 DOI: 10.3760/cma.j.cn112137-20231110-01064] [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] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
Objective: To investigate the association between portal vein thrombosis and rebleeding after non-urgent endoscopic treatment of esophagogastric varices. Methods: The cirrhotic patients with esophagogastric varices diagnosed in the People's Hospital of Zhengzhou University from January 2017 to March 2023 were retrospectively collected. The patients were divided into thrombotic group and non-thrombotic group according to the presence or absence of portal vein thrombosis. The failure rate of endoscopic treatment and rebleeding rate in different periods were compared between the two groups. Receiver operating characteristic (ROC) curve was used to select the best cutoff value of gastric varicose diameter that affected total rebleeding during follow-up in both groups. The influencing factors of rebleeding within 12 and 36 months in both groups were analyzed, and the influencing factors of rebleeding within 36 months in thrombus group were further analyzed. Results: A total of 106 patients were enrolled, including 53 patients in the thrombotic group [male 37, female 16, aged 18-78 (54±13) years] and 53 patients in the non-thrombotic group [male 37, female 16, aged 27-83 (55±12) years]. The follow-up time of the two groups were (20±15) and (25±15) months, respectively. The total rebleeding rate in the thrombotic group was higher than that in the non-thrombotic group [30.2% (16/53) vs 13.2% (7/53), P˂0.05]. The rebleeding rates within 6, 12, 24 and 36 months in the thrombotic group were higher than those in the non-thrombotic group [18.9% (10/53) vs 5.7% (3/53), 18.9% (10/53) vs 5.7% (3/53), 28.3% (15/53) vs 9.4% (5/53), 30.2% (16/53) vs 11.3% (6/53), all P˂0.05]. The best cut-off value of the diameter of gastric varices that affects the total rebleeding in the two groups was 10.4 mm (10 mm was selected as the best cut-off value for the convenience of practical clinical application). Hemoglobin ˂ 85 g/L (HR=0.202, 95%CI: 0.043-0.953, P=0.043), 10 mm ˂ the diameter of GV ≤ 15 mm (HR=5.321, 95%CI: 1.161-24.390, P=0.031) and endoscopic variceal ligation combined with endoscopic tissue adhesive injection (EVL+ETAI) (HR=7.172, 95%CI: 1.910-26.930, P=0.004) were the risk factors for the first gastroesophageal variceal rebleeding within 12 months after non-urgent endoscopic treatment. EVL+ETAI (HR=3.811, 95%CI: 1.441-10.084, P=0.007) and portal vein thrombosis (HR=4.026, 95%CI: 1.483-10.932, P=0.006) were the risk factors for the first gastroesophageal variceal rebleeding within 36 months after non-urgent endoscopic treatment. The study found that, 10 mm ˂ the diameter of GV ≤ 15 mm (HR=7.503, 95%CI: 1.568-35.890, P=0.012) was the risk factor for rebleeding within 36 months in the thrombotic group. Conclusion: Portal vein thrombosis is a risk factor for rebleeding after non-urgent endoscopic treatment of esophagogastric varices.
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Affiliation(s)
- J X Li
- Department of Gastroenterology, People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - Z J Li
- Department of Gastroenterology, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - H M Zhang
- Department of Gastroenterology, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - S S Xu
- Department of Gastroenterology, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - R Z Quan
- Department of Gastroenterology, People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - H Zhang
- Department of Gastroenterology, People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - M M Lu
- Department of Gastroenterology, People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - X Y Wang
- Department of Gastroenterology, People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - S Ma
- Department of Gastroenterology, People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - J Mi
- Department of Gastroenterology, People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - H Ding
- Department of Gastroenterology, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - X L Li
- Department of Gastroenterology, Henan Provincial People's Hospital, Zhengzhou 450003, China
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Lobo RR, Siregar MU, da Silva SS, Monteiro AR, Salas-Solis G, Vicente ACS, Vinyard JR, Johnson ML, Ma S, Sarmikasoglou E, Coronella CJ, Hiibel SR, Faciola AP. Partial replacement of soybean meal with microalgae biomass on in vitro ruminal fermentation may reduce ruminal protein degradation. J Dairy Sci 2024; 107:1460-1471. [PMID: 37944802 DOI: 10.3168/jds.2023-24016] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/20/2023] [Indexed: 11/12/2023]
Abstract
The objective of this study was to evaluate the effects of partially replacing soybean meal (SBM) with algal sources on in vitro ruminal fermentation. Using 6 fermenters in a 3 × 3 replicated Latin square with 3 periods of 10 d each, we tested 3 treatments: a control diet (CRT) with SBM at 17.8% of the diet dry matter (DM); and 50% SBM biomass replacement with either Chlorella pyrenoidosa (CHL); or Spirulina platensis (SPI). The basal diet was formulated to meet the requirements of a 680-kg Holstein dairy cow producing 45 kg/d of milk with 3.5% fat and 3% protein. All diets had a similar nutritional composition (16.0% CP; 34.9% NDF; 31.0% starch, DM basis) and fermenters were provided with 106 g DM/d split into 2 portions. After 7 d of adaptation, samples were collected for 3 d of each period for analyses of ruminal fermentation at 0, 1, 2, 4, 6, and 8 h after morning feeding for evaluation of the ruminal fermentation kinetics. For the evaluation of the daily production of total metabolites and for the evaluation of nutrient degradability, samples from the effluent containers were collected daily. Statistical analysis was performed with the MIXED procedure of SAS with treatment, time, and their interactions considered as fixed effects; day, square, and fermenter were considered as random effects. Orthogonal contrasts (CRT vs. algae; and CHL vs. SPI) were used to depict the treatment effect, and significance was declared when P ≤ 0.05. Fermenters that received algae-based diets had a greater propionate molar concentration and molar proportion when compared with the fermenters fed CRT diets. In addition, those algae-fed fermenters had lower branched short-chain fatty acids (BSCFA) and isoacids (IA), which are biomarkers of ruminal protein degradation, along with lower ammonia (NH3-N) concentration and greater nonammonia nitrogen (NAN). When contrasting with fermenters fed SPI-diets, fermenters fed based CHL-diets had a lower molar concentration of BSCFA and IA, along with lower NH3-N concentration and flow, and greater NAN, bacterial nitrogen flow, and efficiency of nitrogen utilization. Those results indicate that CHL protein may be more resistant to ruminal degradation, which would increase efficiency of nitrogen utilization. In summary, partially replacing SBM with algae biomass, especially with CHL, is a promising strategy to improve the efficiency of nitrogen utilization, due to the fact that fermenters fed CHL-based diets resulted in a reduction in BSCFA and IA, which are markers of protein degradation, and it would improve the efficiency of nitrogen utilization. However, further validation using in vivo models are required.
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Affiliation(s)
- R R Lobo
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - M U Siregar
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - S S da Silva
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - A R Monteiro
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608; Animal Nutrition Laboratory, Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, Brazil, 13400-970
| | - G Salas-Solis
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - A C S Vicente
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - J R Vinyard
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - M L Johnson
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - S Ma
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - E Sarmikasoglou
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - C J Coronella
- Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557
| | - S R Hiibel
- Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557
| | - A P Faciola
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608.
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Zuo QJ, He LL, Ma S, Zhang GR, Zhang TT, Wang Y, Guo YF. [Effects of canagliflozin on amino acid metabolism in atherosclerotic mice]. Zhonghua Xin Xue Guan Bing Za Zhi 2024; 52:64-71. [PMID: 38220457 DOI: 10.3760/cma.j.cn112148-20231009-00275] [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] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Objective: To explore the possible anti-atherosclerotic mechanisms of glucose co-transporter-2 inhibitor canagliflozin. Methods: ApoE-/-mice fed on Western diet were randomly assigned into the model group (n=10) and the canagliflozin group (n=10). C57BL/6J mice fed on normal diet were chosen as the control group (n=10). Mice in the canagliflozin group were gavaged with canagliflozin for 14 weeks. The presence and severity of atherosclerosis were evaluated with HE and oil red O stainings in aortic root section slices. PCR assay was performed to determine the mRNA expression levels of nitric oxide synthase. Hepatic transcriptome analysis and hepatic amino acid detection were conducted using RNA-seq and targeted LC-MS, respectively. Results: HE staining and oil red O staining of the aortic root showed that AS models were successfully established in ApoE-/-mice fed on Western diet for 14 weeks. Canagliflozin alleviated the severity of atherosclerosis in pathology. Hepatic transcriptome analysis indicated that canagliflozin impacted on amino acid metabolism, especially arginine synthesis in ApoE-/-mice. Targeted metabolomics analysis of amino acids showed that canagliflozin reduced hepatic levels of L-serine, L-aspartic acid, tyrosine, L-hydroxyproline, and L-citrulline, but raised the hepatic level of L-arginine. Compared to the model group, the canagliflozin group exhibited higher serum arginine and nitric oxide levels as well as elevated nitric oxide mRNA expression in aortic tissues (P<0.05). Conclusion: Canagliflozin regulated the amino acid metabolism, reduced the levels of glucogenic amino acids,and promoted the synthesis of arginine in atherosclerotic mice.
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Affiliation(s)
- Q J Zuo
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
| | - L L He
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
| | - S Ma
- Department of Pain Medcine, Hebei General Hospital, Shijiazhuang 050051, China
| | - G R Zhang
- Department of Cardiology, the Third Hospital of Shijiazhuang City, Shijiazhuang 050000, China
| | - T T Zhang
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Y Wang
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Y F Guo
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
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Cheng Z, Yang T, Li C, Deng Y, Zhang F, Chen P, Lin Z, Ma S, Liu G. Site-Selective sp 2 C-H Cyanation of Allenes via Copper-Catalyzed Radical Relay. J Am Chem Soc 2023; 145:25995-26002. [PMID: 38011726 DOI: 10.1021/jacs.3c11368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Compared with the extensively reported hydrogen atom transfer (HAT) at sp3 C-H, abstraction of hydrogen atoms at the sp2 carbon is extremely rare. Here, we communicate the site-selective cyanation of the sp2 C-H bond of allenes using the strategy of copper-catalyzed radical relay. The reactions afford various allenyl nitriles directly from simple allenes with a broad substrate scope and a remarkable functional group compatibility under mild conditions. These reactions exhibit excellent site-selectivity toward sp2 C-H, which can be attributed to the unique pocket created by the Cu-bound nitrogen-centered radical. The favorable HAT on sp2 C-H is due to crucial hydrogen bonding between the fluoride bonded to the Cu(II) center and the hydrogen atom at the allylic position. These features enable the late-stage functionalization of druglike bioactive molecules containing an allene motif.
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Affiliation(s)
- Zhongming Cheng
- State Key Laboratory of Organometallic Chemistry and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Tilong Yang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
| | - Can Li
- State Key Laboratory of Organometallic Chemistry and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Yunshun Deng
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Fangjia Zhang
- State Key Laboratory of Organometallic Chemistry and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Pinhong Chen
- State Key Laboratory of Organometallic Chemistry and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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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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Ofori-Anyinam N, Hamblin M, Coldren ML, Li B, Mereddy G, Shaikh M, Shah A, Ranu N, Lu S, Blainey PC, Ma S, Collins JJ, Yang JH. KatG catalase deficiency confers bedaquiline hyper-susceptibility to isoniazid resistant Mycobacterium tuberculosis. bioRxiv 2023:2023.10.17.562707. [PMID: 37905073 PMCID: PMC10614911 DOI: 10.1101/2023.10.17.562707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Multidrug-resistant tuberculosis (MDR-TB) is a growing source of global mortality and threatens global control of tuberculosis (TB) disease. The diarylquinoline bedaquiline (BDQ) recently emerged as a highly efficacious drug against MDR-TB, defined as resistance to the first-line drugs isoniazid (INH) and rifampin. INH resistance is primarily caused by loss-of-function mutations in the catalase KatG, but mechanisms underlying BDQ's efficacy against MDR-TB remain unknown. Here we employ a systems biology approach to investigate BDQ hyper-susceptibility in INH-resistant Mycobacterium tuberculosis . We found hyper-susceptibility to BDQ in INH-resistant cells is due to several physiological changes induced by KatG deficiency, including increased susceptibility to reactive oxygen species and DNA damage, remodeling of transcriptional programs, and metabolic repression of folate biosynthesis. We demonstrate BDQ hyper-susceptibility is common in INH-resistant clinical isolates. Collectively, these results highlight how altered bacterial physiology can impact drug efficacy in drug-resistant bacteria.
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Wu F, Tang X, Zhang Y, Wei L, Wang T, Lu Z, Wei J, Ma S, Jiang L, Gao T, Huang Q. The Role of Radiation Therapy for Metastatic Cervical Cancer. Int J Radiat Oncol Biol Phys 2023; 117:e555. [PMID: 37785704 DOI: 10.1016/j.ijrobp.2023.06.1865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Survival rates for women with metastatic cervical cancer (CC) are low, with limited management options. Radiation therapy (RT) for metastatic disease has led to prolonged survival in other malignancies, however, the data are scarce in CC. Herein, we evaluated the effect of RT for metastatic CC. MATERIALS/METHODS A total of 58 patients with metastatic CC between September 2019 and January 2023 were retrospectively analyzed. All the patients were treated with platinum-based chemotherapy combined with targeted therapy or immunotherapy followed with or without RT (NRT). The recent efficacy, survival status and prognostic factors were analyzed statistically. RESULTS Objective response rate (ORR) was 63.6% with one complete and twenty partial responses in RT group (n = 33) and 40.0% with two complete and eight partial responses in NRT group (n = 25), respectively (p = 0.074). Disease control rate (DCR) of the RT and NRT groups were 79.4% vs 80.0%, respectively (p = 0.861). Median follow-up time was 17 months (3-39months). In RT group, 11(33.3%) patients experienced local regional or distant failure and 9 (27.3%) patients were dead. In NRT group, 15(60%) patients had progression and 8 (32%) patients dead. There was no significant difference between the two groups in overall survival (OS); however, RT group displayed superior progression-free survival (PFS) (1-year OS: 72.7% vs. 68.0%, p = 0.460; 1-year PFS: 66.7% vs. 40.0%, p = 0.039). The multivariate analysis showed that RT, immunotherapy, lymph node metastasis only relevant predictor of superior PFS but not OS. In subgroup analysis, patients treated with RT appeared to have a better PFS in some specific cohorts, such as age>45 years (72.0% vs 36.4% P = 0.015), squamous carcinoma histology (71.0% vs 40.9% P = 0.017), metastatic at diagnosis (75.0% vs 47.6% P = 0.012), non-targeted therapy (72.4% vs 43.8% P = 0.040). No significant increase in treatment-related toxicity was observed in the RT group compared with the NRT group. CONCLUSION RT provided superior PFS in metastatic CC patients compared to NRT, and well tolerated. Moreover, RT, immunotherapy, lymph node metastasis only were independent significant prognostic factors for PFS. Subgroup analysis showed that combination of RT and chemotherapy obtained favorable PFS in metastatic CC patients with age>45 years, squamous carcinoma histology, metastatic at diagnosis, non-targeted therapy. Studies with a larger sample size and longer follow-up are warranted.
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Affiliation(s)
- F Wu
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - X Tang
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China; Department of Radiation Oncology, Liuzhou People's Hospital, Liuzhou, Guangxi, China
| | - Y Zhang
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - L Wei
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - T Wang
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Z Lu
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - J Wei
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - S Ma
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - L Jiang
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - T Gao
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Q Huang
- Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
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12
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Zhang H, Yue J, Zhang K, Qiu L, Xia B, Zhang M, Yin Z, Ma S. Hyperthermia Enhances the Radiosensitivity of Pancreatic Cancer Cells by Inhibiting Wnt2B Signaling. Int J Radiat Oncol Biol Phys 2023; 117:e277. [PMID: 37785041 DOI: 10.1016/j.ijrobp.2023.06.1254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Pancreatic cancer (PC) is a highly lethal human malignance. Due to unobvious symptoms at early stage, most of the patients with PC are diagnosed at late stages and lose the chance of surgical resection. Furthermore, PC patients are resistant to chemoradiotherapy and therefore show a dismal survival. Hyperthermia is commonly used as a sensitizer of chemotherapy or radiotherapy for the clinical treatment of human cancers. Our study aimed to investigate whether hyperthermia can improve the radiosensitivity of PC cells and uncover the involved mechanisms. MATERIALS/METHODS PC cells BxPC3, CFPAC-1 and PANC1 were heated to 43 ℃ 1 h before exposure to ionizing irradiation (IR). The radiosensitivity of PC cells were detected in vitro by colony formation assay, immunofluence analysis and western blotting. The mechanisms studies have been conducted using qRT-PCR analysis, cDNA/siRNA transfection and comet assay. RESULTS Hyperthermia significantly enhanced the radiosensitivity of PC cells by decreasing their colony formation and increasing DNA damage following IR. By qRT-PCR analysis of Wnt genes expressions, we found Wnt2B was significantly down-regulated in PC-3 cells which were treated with the combination of hyperthermia and IR compared with hyperthermia or IR alone. Functional assays showed that the expression level of Wnt2B was inversely associated with the radiosensitivity of PC-3 cells. Furthermore, we found hyperthermia inhibited the expression of DNA repair proteins such as p-BRCA1 and p-MRE11 in PC cells following IR CONCLUSION: Hyperthermia can significantly enhance the radiosensitivity of PC cells in a Wnt2B signaling-dependent manner.
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Affiliation(s)
- H Zhang
- Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - J Yue
- Hangzhou Cancer Hospital, Hangzhou, China
| | - K Zhang
- Department of Radiation Oncology, Hangzhou Cancer Hospital, Hangzhou, China
| | - L Qiu
- Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - B Xia
- Hangzhou Cancer Hospital, Hangzhou, China
| | - M Zhang
- Hangzhou Cancer Hospital, Hangzhou, China
| | - Z Yin
- The Fourth Clinical College of Zhejiang Chinese Medical University, Hangzhou City, China
| | - S Ma
- Medical Oncology, Xiaoshan Hospital Affiliated to Hangzhou Normal University, Hangzhou, China
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13
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Wang W, Huang D, Yu Y, Qian H, Ma S. A Modular Approach for the Synthesis of Natural and Artificial Terpenoids. Angew Chem Int Ed Engl 2023; 62:e202307626. [PMID: 37439109 DOI: 10.1002/anie.202307626] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/14/2023]
Abstract
Many terpenoids with isoprene unit(s) demonstrating critical biological activities have been isolated and characterized. In this study, we have developed a robust chem-stamp strategy for the construction of the key isoprene unit, which consists of two steps: one-carbon extension of aldehydes to the alkenyl boronates by the boron-Wittig reaction and the rhodium-catalyzed reaction of alkenyl boronates with 2,3-allenols to yield enals. This chem-stamp could readily be applied repeatedly and separately, enabling the modular concise synthesis of many natural and pharmaceutically active terpenoids, including retinal, β-carotene, vitamin A, tretinoin, fenretinide, acitretin, ALRT1550, nigerapyrone C, peretinoin, and lycopene. Owing to the diversified availability of the starting materials, aldehydes and 2,3-allenols, creation of new non-natural terpenoids has been realized from four dimensions: the number of isoprene units, the side chain, and the two terminal groups.
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Affiliation(s)
- Weiyi Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Dongyu Huang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Yibo Yu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, 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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14
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Zhang D, Fan J, Shi Y, Huang Y, Fu C, Wu X, Ma S. Copper-catalyzed propargylic C-H functionalization for allene syntheses. Chem Sci 2023; 14:9191-9196. [PMID: 37655026 PMCID: PMC10466309 DOI: 10.1039/d3sc01501g] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 08/08/2023] [Indexed: 09/02/2023] Open
Abstract
Allenenitriles bearing different synthetically versatile functional groups have been prepared smoothly from 5-alkynyl fluorosulfonamides in decent yields with an excellent chemo- and regio-selectivity under redox neutral conditions. The resulting allenenitriles can be readily converted to useful functionalized heterocycles. Based on mechanistic study, it is confirmed that this is the first example of radical-based non-activated propargylic C-H functionalization for allene syntheses.
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Affiliation(s)
- Dongjie Zhang
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 P. R. China
| | - Junjie Fan
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 P. R. China
| | - Yaqi Shi
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 P. R. China
| | - Yankai Huang
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 P. R. China
| | - Chunling Fu
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 P. R. China
| | - Xiaoyan Wu
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 P. R. China
| | - Shengming Ma
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 P. R. China
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15
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Popoola A, Ghosh PS, Kingsland M, Kashikar R, DeTellem D, Xu Y, Ma S, Witanachchi S, Lisenkov S, Ponomareva I. First-principles property assessment of hybrid formate perovskites. J Chem Phys 2023; 159:074702. [PMID: 37589410 DOI: 10.1063/5.0159526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 07/19/2023] [Indexed: 08/18/2023] Open
Abstract
Hybrid organic-inorganic formate perovskites, AB(HCOO)3, are a large family of compounds that exhibit a variety of phase transitions and diverse properties, such as (anti)ferroelectricity, ferroelasticity, (anti)ferromagnetism, and multiferroism. While many properties of these materials have already been characterized, we are not aware of any study that focuses on the comprehensive property assessment of a large number of formate perovskites. A comparison of the properties of materials within the family is challenging due to systematic errors attributed to different techniques or the lack of data. For example, complete piezoelectric, dielectric, and elastic tensors are not available. In this work, we utilize first-principles density functional theory based simulations to overcome these challenges and to report structural, mechanical, dielectric, piezoelectric, and ferroelectric properties of 29 formate perovskites. We find that these materials exhibit elastic stiffness in the range 0.5-127.0 GPa; highly anisotropic linear compressibility, including zero and even negative values; dielectric constants in the range 0.1-102.1; highly anisotropic piezoelectric response with the longitudinal values in the range 1.18-21.12 pC/N; and spontaneous polarizations in the range 0.2-7.8 μC/cm2. Furthermore, we propose and computationally characterize a few formate perovskites that have not been reported yet.
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Affiliation(s)
- Abduljelili Popoola
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - P S Ghosh
- Glass and Advanced Materials Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India
| | - Maggie Kingsland
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - Ravi Kashikar
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - D DeTellem
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - Yixuan Xu
- Department of Chemistry, University of North Texas, CHEM 305D, 1508 W. Mulberry Street, Denton, Texas 76201, USA
| | - S Ma
- Department of Chemistry, University of North Texas, CHEM 305D, 1508 W. Mulberry Street, Denton, Texas 76201, USA
| | - S Witanachchi
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - S Lisenkov
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - I Ponomareva
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
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16
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Li C, Zhou Z, Ma S. A Pd-catalyzed highly selective three-component protocol for trisubstituted allenes. Chem Sci 2023; 14:7709-7715. [PMID: 37476716 PMCID: PMC10355113 DOI: 10.1039/d3sc01849k] [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: 04/08/2023] [Accepted: 06/20/2023] [Indexed: 07/22/2023] Open
Abstract
Herein we report the first example of a Pd-catalyzed highly selective three-component reaction of alkynyl-1,4-diol dicarbonates, organoboronic acids, and malonate anions for the efficient synthesis of trisubstituted 2,3-allenyl malonates not readily available by the known protocols. The reaction demonstrates an excellent regio- and chemo-selectivity for both the oxidative addition referring to the two C-O bonds and the subsequent coupling with the nucleophile with a remarkable functional group compatibility. A series of control experiments confirm a unique mechanism involving β-O elimination forming alka-1,2,3-triene and the subsequent insertion of its terminal C[double bond, length as m-dash]C bond into the Ar-Pd bond.
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Affiliation(s)
- 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
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zhengnan Zhou
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 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
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
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17
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White MJ, Sheka AC, LaRocca CJ, Irey RL, Ma S, Wirth KM, Benner A, Denbo JW, Jensen EH, Ankeny JS, Ikramuddin S, Tuttle TM, Hui JYC, Marmor S. The association of new-onset diabetes with subsequent diagnosis of pancreatic cancer-novel use of a large administrative database. J Public Health (Oxf) 2023; 45:e266-e274. [PMID: 36321614 PMCID: PMC10273390 DOI: 10.1093/pubmed/fdac118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 09/05/2022] [Accepted: 09/26/2022] [Indexed: 11/03/2023] Open
Abstract
BACKGROUND Screening options for pancreatic ductal adenocarcinoma (PDAC) are limited. New-onset type 2 diabetes (NoD) is associated with subsequent diagnosis of PDAC in observational studies and may afford an opportunity for PDAC screening. We evaluated this association using a large administrative database. METHODS Patients were identified using claims data from the OptumLabs® Data Warehouse. Adult patients with NoD diagnosis were matched 1:3 with patients without NoD using age, sex and chronic obstructive pulmonary disease (COPD) status. The event of PDAC diagnosis was compared between cohorts using the Kaplan-Meier method. Factors associated with PDAC diagnosis were evaluated with Cox's proportional hazards modeling. RESULTS We identified 640 421 patients with NoD and included 1 921 263 controls. At 3 years, significantly more PDAC events were identified in the NoD group vs control group (579 vs 505; P < 0.001). When controlling for patient factors, NoD was significantly associated with elevated risk of PDAC (HR 3.474, 95% CI 3.082-3.920, P < 0.001). Other factors significantly associated with PDAC diagnosis were increasing age, increasing age among Black patients, and COPD diagnosis (P ≤ 0.05). CONCLUSIONS NoD was independently associated with subsequent diagnosis of PDAC within 3 years. Future studies should evaluate the feasibility and benefit of PDAC screening in patients with NoD.
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Affiliation(s)
- M J White
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
| | - A C Sheka
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- OptumLabs® Visiting Fellow, Eden Prairie, MN, USA Institute for Health Informatics, University of Minnesota, Minneapolis MN, 55455 USA
| | - C J LaRocca
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- Masonic Cancer Center, University of Minnesota, Minneapolis MN 55455, USA
| | - R L Irey
- Clinical and Translational Science Institute, University of Minnesota, Minneapolis MN, 55455 USA
| | - S Ma
- Clinical and Translational Science Institute, University of Minnesota, Minneapolis MN, 55455 USA
| | - K M Wirth
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- OptumLabs® Visiting Fellow, Eden Prairie, MN, USA Institute for Health Informatics, University of Minnesota, Minneapolis MN, 55455 USA
| | - A Benner
- Clinical and Translational Science Institute, University of Minnesota, Minneapolis MN, 55455 USA
| | - J W Denbo
- Department of Gastrointestinal Oncology, Moffitt Cancer Center, Tampa FL 33612 USA
| | - E H Jensen
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- Masonic Cancer Center, University of Minnesota, Minneapolis MN 55455, USA
| | - J S Ankeny
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- Masonic Cancer Center, University of Minnesota, Minneapolis MN 55455, USA
| | - S Ikramuddin
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- OptumLabs® Visiting Fellow, Eden Prairie, MN, USA Institute for Health Informatics, University of Minnesota, Minneapolis MN, 55455 USA
| | - T M Tuttle
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- Masonic Cancer Center, University of Minnesota, Minneapolis MN 55455, USA
| | - J Y C Hui
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- Masonic Cancer Center, University of Minnesota, Minneapolis MN 55455, USA
| | - S Marmor
- Department of Surgery, University of Minnesota, Minneapolis MN, 55455 USA
- Masonic Cancer Center, University of Minnesota, Minneapolis MN 55455, USA
- Clinical and Translational Science Institute, University of Minnesota, Minneapolis MN, 55455 USA
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18
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Sheng C, Ling Z, Xiao J, Yang K, Xie F, Ma S, Zhang W. Enantio- and Diastereoselective Synthesis of Chiral Tetrasubstituted α-Amino Allenoates Bearing a Vicinal All-Carbon Quaternary Stereocenter with Dual-Copper-Catalysis. Angew Chem Int Ed Engl 2023:e202305680. [PMID: 37261939 DOI: 10.1002/anie.202305680] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/25/2023] [Accepted: 06/01/2023] [Indexed: 06/03/2023]
Abstract
The skeletons of chiral tetrasubstituted allenes bearing a vicinal all-carbon quaternary stereocenter are of importance but still challenging to synthesize. Herein, we report enantio- and diastereoselective γ-additions of 1-alkynyl ketimines with dual-copper-catalysis under mild conditions, affording chiral tetrasubstituted α-amino allenoates bearing a vicinal all-carbon quaternary stereocenter in high yields (up to 99% yield) with excellent enantioselectivities (up to 99% ee) and diastereoselectivities (up to >20:1 dr). Importantly, the stereodivergent synthesis of the products was realized by the asymmetric γ-addition reaction and the Grignard reagent promoted epimerization. Moreover, the dual-copper-catalyzed γ-addition reactions were smoothly applied to a gram-scale reaction and adopted to introduce chiral tetrasubstituted allenyl moieties into bioactive molecules. Mechanistic experiments and density functional theory (DFT) calculations demonstrated that the asymmetric γ-addition reactions were catalyzed by double chiral copper catalysts.
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Affiliation(s)
- Cheng Sheng
- Shanghai Jiao Tong University, School of Chemistry and Chemical Engineering, 800 Dongchuan Road, Shanghai, 800 Dongchuan Road, Shanghai, 200240, Shanghai, CHINA
| | - Zheng Ling
- Shanghai Jiao Tong University, School of Chemistry and Chemical Engineering, CHINA
| | - Junzhe Xiao
- Shanghai Institute of Organic Chemistry, State Key Laboratory of Organometallic Chemistry, CHINA
| | - Kai Yang
- Shanghai Jiao Tong University, School of Chemistry and Chemical Engineering, CHINA
| | - Fang Xie
- Shanghai Jiao Tong University, School of Chemistry and Chemical Engineering, CHINA
| | - Shengming Ma
- Shanghai Institute of Organic Chemistry, State Key Laboratory of Organometallic Chemistry, CHINA
| | - Wanbin Zhang
- Shanghai Jiao Tong University, School of Chemistry and Chemical Engineering, 800 Dongchuan Road, 200240, Shanghai, CHINA
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19
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Zhuoke L, Lin T, Liu X, Ma S, Li X, Yang F, He B, Liu J, Zhang Y, Xie L. High-Temperature-Induced Pore System Evolution of Immature Shale with Different Total Organic Carbon Contents. ACS Omega 2023; 8:12773-12786. [PMID: 37065028 PMCID: PMC10099433 DOI: 10.1021/acsomega.2c07990] [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] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/09/2023] [Indexed: 06/19/2023]
Abstract
The pyrolysis process of source rock, especially organic-rich immature shale, is required for oil and gas extraction, during which the evolution of the pore structure system in the immature shale determines the heat conduction and fluid flow under the heating treatment. Although some sound achievements have been made regarding the pyrolysis of immature shale, the effect of the total organic carbon (TOC) content on the pore structure evolution of immature shale remains unclear. With respect to this issue, in this work, a series of N2 adsorption/desorption and nuclear magnetic resonance (NMR) experiments were conducted, and fractal dimension theory was also introduced to analyze the pore structure evolution of immature shale subjected to heating treatment in a quantitative manner. The results indicate that the adsorption branch of the nitrogen adsorption-desorption isotherm can be divided into three stages. The pore structure of different TOC immature shales does not change significantly, and they are all slit-shaped. In addition, immature shale with a higher organic content has a higher hydrocarbon expulsion strength and a higher pore volume growth rate, which indicate that the pyrolysis of organic matter greatly affects the pore structure of immature shale during heating. This phenomenon shows that the pyrolysis of organic matter greatly influences the pore structure of immature shale during the heating process. The pores of immature shale in the study area have significant fractal characteristics, the fractal dimension is between 2.397 and 2.636, the pore space of the sample is extremely small, the pore structure is extremely complex, and the heterogeneity is strong.
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Affiliation(s)
- Luo Zhuoke
- State
Key Laboratory of Hydraulic and Mountain River Engineering, College
of Architecture and Environment, Sichuan
University, Chengdu 610065, China
- Department
of Civil Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Tiefeng Lin
- Exploration
and Development Research Institute of Daqing Oilfield Co Ltd., Daqing 163712, China
- Heilongjiang
Key Laboratory of Tight Oil and Shale Oil Accumulations, Daqing 163712, China
| | - Xin Liu
- Exploration
and Development Research Institute of Daqing Oilfield Co Ltd., Daqing 163712, China
- Heilongjiang
Key Laboratory of Tight Oil and Shale Oil Accumulations, Daqing 163712, China
| | - Shengming Ma
- Exploration
and Development Research Institute of Daqing Oilfield Co Ltd., Daqing 163712, China
- Heilongjiang
Key Laboratory of Tight Oil and Shale Oil Accumulations, Daqing 163712, China
| | - Xin Li
- Exploration
and Development Research Institute of Daqing Oilfield Co Ltd., Daqing 163712, China
- Heilongjiang
Key Laboratory of Tight Oil and Shale Oil Accumulations, Daqing 163712, China
| | - Fan Yang
- Exploration
and Development Research Institute of Daqing Oilfield Co Ltd., Daqing 163712, China
- Heilongjiang
Key Laboratory of Tight Oil and Shale Oil Accumulations, Daqing 163712, China
| | - Bo He
- Institute
of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China
| | - Jun Liu
- Institute
of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China
| | - Yao Zhang
- State
Key Laboratory of Hydraulic and Mountain River Engineering, College
of Architecture and Environment, Sichuan
University, Chengdu 610065, China
- Department
of Civil Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Lingzhi Xie
- State
Key Laboratory of Hydraulic and Mountain River Engineering, College
of Architecture and Environment, Sichuan
University, Chengdu 610065, China
- Department
of Civil Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Institute
of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China
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20
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Ju Y, Liu K, Ma G, Zhu B, Wang H, Hu Z, Zhao J, Zhang L, Cui K, He XR, Huang M, Li Y, Xu S, Gao Y, Liu K, Liu H, Zhuo Z, Zhang G, Guo Z, Ye Y, Zhang L, Zhou X, Ma S, Qiu Y, Zhang M, Tao Y, Zhang M, Xian L, Xie W, Wang G, Wang Y, Wang C, Wang DH, Yu K. Bacterial antibiotic resistance among cancer inpatients in China: 2016-20. QJM 2023; 116:213-220. [PMID: 36269193 DOI: 10.1093/qjmed/hcac244] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 09/16/2022] [Accepted: 10/10/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The incidence of infections among cancer patients is as high as 23.2-33.2% in China. However, the lack of information and data on the number of antibiotics used by cancer patients is an obstacle to implementing antibiotic management plans. AIM This study aimed to investigate bacterial infections and antibiotic resistance in Chinese cancer patients to provide a reference for the rational use of antibiotics. DESIGN This was a 5-year retrospective study on the antibiotic resistance of cancer patients. METHODS In this 5-year surveillance study, we collected bacterial and antibiotic resistance data from 20 provincial cancer diagnosis and treatment centers and three specialized cancer hospitals in China. We analyzed the resistance of common bacteria to antibiotics, compared to common clinical drug-resistant bacteria, evaluated the evolution of critical drug-resistant bacteria and conducted data analysis. FINDINGS Between 2016 and 2020, 216 219 bacterial strains were clinically isolated. The resistance trend of Escherichia coli and Klebsiella pneumoniae to amikacin, ciprofloxacin, cefotaxime, piperacillin/tazobactam and imipenem was relatively stable and did not significantly increase over time. The resistance of Pseudomonas aeruginosa strains to all antibiotics tested, including imipenem and meropenem, decreased over time. In contrast, the resistance of Acinetobacter baumannii strains to carbapenems increased from 4.7% to 14.7%. Methicillin-resistant Staphylococcus aureus (MRSA) significantly decreased from 65.2% in 2016 to 48.9% in 2020. CONCLUSIONS The bacterial prevalence and antibiotic resistance rates of E. coli, K. pneumoniae, P. aeruginosa, A. baumannii, S. aureus and MRSA were significantly lower than the national average.
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Affiliation(s)
- Y Ju
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - K Liu
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - G Ma
- Department of Critical Care Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - B Zhu
- Department of Critical Care Medicine, Fudan University Shanghai Cancer Center, Shanghai, China
| | - H Wang
- Department of Critical Care Medicine, Peking University Cancer Hospital & Institute, Beijing, China
| | - Z Hu
- Department of Critical Care Medicine, Hebei Tumor Hospital, Shijiazhuang, China
| | - J Zhao
- Department of Critical Care Medicine, Hunan Cancer Hospital, Changsha, China
| | - L Zhang
- Department of Critical Care Medicine, Hubei Cancer Hospital, Wuhan, China
| | - K Cui
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - X-R He
- Department of Critical Care Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - M Huang
- Department of Critical Care Medicine, Shanxi Tumor Hospital, Taiyuan, China
| | - Y Li
- Department of Critical Care Medicine, Guangxi Medical University Cancer Hospital, Nanning, China
| | - S Xu
- Department of Critical Care Medicine, Sichuan Cancer Hospital, Chengdu, China
| | - Y Gao
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - K Liu
- Department of Critical Care Medicine, Zhejiang Cancer Hospital, Hangzhou, China
| | - H Liu
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - Z Zhuo
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - G Zhang
- Department of Critical Care Medicine, Jilin Tumor Hospital, Changchun, China
| | - Z Guo
- Department of Critical Care Medicine, Shandong Cancer Hospital and Institute, Shandong, China
| | - Y Ye
- Department of Critical Care Medicine, Fujian Cancer Hospital, Fuzhou, China
| | - L Zhang
- Department of Critical Care Medicine, Anhui Provincial Cancer Hospital, Hefei, China
| | - X Zhou
- Department of Critical Care Medicine, Gansu Provincial Cancer Hospital, Lanzhou, China
| | - S Ma
- Department of Critical Care Medicine, Jiangsu Cancer Hospital, Nanjing, China
| | - Y Qiu
- Department of Critical Care Medicine, Jiangxi Cancer Hospital, Nanchang, China
| | - M Zhang
- Department of Critical Care Medicine, Hangzhou Cancer Hospital, Hangzhou, China
| | - Y Tao
- Department of Critical Care Medicine, Nantong Tumor Hospital, Nantong, China
| | - M Zhang
- Department of Critical Care Medicine, Baotou Cancer Hospital, Baotou, China
| | - L Xian
- Department of Critical Care Medicine, Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - W Xie
- Department of Critical Care Medicine, The Affiliated Cancer Hospital of Guizhou Medical University, Guiyang, China
| | - G Wang
- Department of Critical Care Medicine, The First Hospital of Jilin University, Changchun, China
| | - Y Wang
- Department of Critical Care Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - C Wang
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - D-H Wang
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - K Yu
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, China
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21
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Li C, Zhou Z, Li Y, Guo Y, Ma S. Reactivity of vinylidene-π-allyl palladium(II) species. Chem Commun (Camb) 2023; 59:3727-3730. [PMID: 36892480 DOI: 10.1039/d2cc06871k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
The reactivity of a new type of organometallic intermediate, vinylidene-π-allyl palladium species, has been demonstrated: the reaction between 4-alken-2-ynyl carbonates and stabilized carbon nucleophiles afforded functionalized 1,2,3,-butatriene compounds in moderate to high yields and excellent regioselectivities.
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Affiliation(s)
- 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.
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhengnan Zhou
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China.
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yuling Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China.
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yinlong Guo
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China.
- University of Chinese Academy of Sciences, Beijing 100049, 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.
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
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22
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Han J, Liu S, Wang H, Wang J, Qian H, Li Z, Ma S, Zhang J. Pd/Xu-Phos-catalyzed asymmetric elimination of fully substituted enol triflates into axially chiral trisubstituted allenes. Sci Adv 2023; 9:eadg1002. [PMID: 36930705 PMCID: PMC10022902 DOI: 10.1126/sciadv.adg1002] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
The β-H elimination, as one of the most important elementary reactions in transition metal chemistry, is a key step in quenching the carbon-palladium bond for the Heck reaction. However, the β-H elimination of the alkenyl palladium species leading to allene is an energetically unfavored process, and therefore, it has been a long-standing challenge in control of this process via enantioselective manner. We developed a concise and efficient methodology to construct trisubstituted chiral allenes from stereodefined fully substituted enol triflates by the enantioselective β-H elimination of the alkenyl palladium species under mild conditions. The identified Xu-Phos play a crucial role in the chemoselectivity and enantioselectivity. Multiple linear regression analysis shows the important steric effect on enantioselectivity. DFT computation results allow us to propose an intramolecular base (-OAc)-assisted deprotonation mechanism for this progress. Distortion-interaction and energy decomposition analysis indicate that the difference in electrostatic energy (Eelec) of the two intramolecular base-assisted deprotonation transition states dominates the stereoselectivity.
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Affiliation(s)
- Jie Han
- Department of Chemistry, Fudan University, Shanghai 200438, China
- Zhuhai Fudan Innovation Institute, Zhuhai 519000, China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China
| | - Siyuan Liu
- Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Huanan Wang
- Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Jie Wang
- Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Hui Qian
- Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Zhiming Li
- Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Shengming Ma
- Department of Chemistry, Fudan University, Shanghai 200438, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, Shanghai, China
| | - Junliang Zhang
- Department of Chemistry, Fudan University, Shanghai 200438, China
- Zhuhai Fudan Innovation Institute, Zhuhai 519000, China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China
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23
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Wang J, Ma S, Wu Q, Xu Q, Wang J, Zhang R, Bai L, Li L, Liu H. Effects of testis testosterone deficiency on gene expression in the adrenal gland and skeletal muscle of ducks. Br Poult Sci 2023. [PMID: 36735924 DOI: 10.1080/00071668.2023.2176741] [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] [Indexed: 02/05/2023]
Abstract
1. Testosterone has an anabolic effect on skeletal muscle. The testes produce most of the testosterone in vivo, while the adrenal glands contribute smaller amounts. When testis testosterone is deficient the adrenal gland increases steroid hormone synthesis, which is referred to as compensatory testicular adaptation (CTA).2. To reveal the effects of testis testosterone deficiency on adrenal steroid hormones synthesis and skeletal muscle development, gene expression related to adrenal steroid hormones synthesis and skeletal muscle development were determined by RNA-seq.3. The results showed that castrating male ducks had significant effects on their body weight but no significant impact on cross-sectional area (CSA) or density of pectoral muscle fibres. In skeletal muscle protein metabolism, expression levels of the catabolic gene atrogin1/MAFbx and the anabolic gene eEF2 were significantly higher, with concomitant increases after castration. The adrenal glands' alteration of the steroid hormone 11β-hydroxylase (CYP11B1) was significantly lower following castration.4. Expression pattern analysis showed that the adrenal glands' glucocorticoid receptor (NR3C1/GR) had a potential regulatory relationship with the skeletal muscle-related genes (Pax7, mTOR, FBXO32, FOXO3, and FOXO4).5. The data showed that castration affected muscle protein metabolism, adrenal steroid and testosterone synthesis. In addition, it was speculated that, after castration, steroid hormones produced by the adrenal gland could have a compensatory effect, which might mediate the changes in skeletal muscle protein metabolism and development.
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Affiliation(s)
- J Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - S Ma
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - Q Wu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - Q Xu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - J Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - R Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - L Bai
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - L Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
| | - H Liu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, P.R. China
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24
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Ma S, Zheng S, Zhang W, Chen D, Pan F. Algebraic Graph-Based Machine Learning Model for Li-Cluster Prediction. J Phys Chem A 2023; 127:2051-2059. [PMID: 36808983 DOI: 10.1021/acs.jpca.3c00272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
In cluster research, determining the ground-state structure of medium-sized clusters is hindered by a large number of local minimum on potential energy surfaces. The global optimization heuristic algorithm is time-consuming due to the use of DFT to determine the relative size of the cluster energy. Although machine learning (ML) is proved to be a promising way to reduce the DFT computational costs, a suitable method to represent clusters as input vectors is one of the bottlenecks in the application of ML to cluster research. In this work, we proposed a multiscale weighted spectral subgraph (MWSS) as an effective low-dimension representation of clusters and build an MWSS-based ML model to discover the structure-energy relationships in lithium clusters. We combine this model with the particle swarm optimization algorithm and DFT calculations to search for globally stable structures of clusters. We have successfully predicted the ground-state structure of Li20.
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Affiliation(s)
- Shengming Ma
- School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Shisheng Zheng
- School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Wentao Zhang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Dong Chen
- School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Feng Pan
- School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
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25
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Tang Y, Ma S, Lin S, Wu Y, Chen S, Liu G, Ma L, Wang Z, Jiang L, Wang Y. Cell-free protein synthesis of CD1E and B2M protein and in vitro interaction. Protein Expr Purif 2023; 203:106209. [PMID: 36460227 DOI: 10.1016/j.pep.2022.106209] [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: 06/12/2022] [Revised: 11/20/2022] [Accepted: 11/21/2022] [Indexed: 11/30/2022]
Abstract
CD1E, one of the most important glycolipid antigens on T cell membranes, is required for glycolipid antigen presentation on the cell surface. Cell-based recombinant expression systems have many limitations for synthesizing transmembrane proteins such as CD1E, including low protein yields and miss folding. To overcome these challenges, here we successfully synthesized high-quality soluble CD1E using an E.coli cell-free protein synthesis system (CFPS) with the aid of detergent. Following purification by Ni2+ affinity chromatography, we were able to obtain CD1E with ≥90% purity. Furthermore, we used the string website to predict the protein interaction network of CD1E and identified a potential binding partner━B2M. Similarly, we synthesized soluble B2M in the E.coli CFPS. Finally, we verified the interaction between CD1E and B2M by using Surface Plasmon Resonance (SPR). Taken together, the methods described here provide an alternative way to obtain active transmembrane protein and may facilitate future structural and functional studies on CD1E.
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Affiliation(s)
- Yajie Tang
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, 455000, China
| | - Shengming Ma
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, 455000, China
| | - Sen Lin
- Anyang Kindstar Global Medical Laboratory LTD, Anyang, Henan province, 455000, China
| | - Yinrong Wu
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, 455000, China
| | - Siyang Chen
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, 455000, China
| | - Gang Liu
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, Sydney, NSW, Australia
| | - Lisong Ma
- State Key Laboratory of North China Crop Improvement and RegμLation, College of Horticulture, Hebei Agricultural University, Baoding, 071001, China
| | - Zaihua Wang
- Guangdong Provincial Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Lele Jiang
- Surgical Diagnostics Pty Ltd, Roseville, Sydney, 2069, Australia.
| | - Yao Wang
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, 455000, China.
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26
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Zhao L, Luo Y, Xiao J, Huo X, Ma S, Zhang W. Stereodivergent Synthesis of Allenes with α,β-Adjacent Central Chiralities Empowered by Synergistic Pd/Cu Catalysis. Angew Chem Int Ed Engl 2023; 62:e202218146. [PMID: 36594710 DOI: 10.1002/anie.202218146] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [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: 12/08/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 01/04/2023]
Abstract
The stereodivergent synthesis of allene compounds bearing α,β-adjacent central chiralities has been realized via the Pd/Cu-catalyzed dynamic kinetic asymmetric alkylation of racemic allenylic esters. The matched reactivity of bimetallic catalytic system enables the challenging reaction of racemic aryl-substituted allenylic acetates with sterically crowded aldimine esters smoothly under mild reaction conditions. Various chiral non-natural amino acids bearing a terminal allenyl group are easily synthesized in high yields and with excellent diastereo- and enantioselectivities (up to >20 : 1 dr, >99 % ee). Importantly, all four stereoisomers of the product can be readily accessed by switching the configurations of the two chiral metal catalysts. Furthermore, the easy interconversion between the uncommon η3 -butadienyl palladium intermediate featuring a weak C=C/Pd coordination bond and a stable Csp2 -Pd bond is beneficial for the dynamic kinetic asymmetric transformation process (DyKAT).
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Affiliation(s)
- Ling Zhao
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yicong Luo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Junzhe Xiao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Xiaohong Huo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China.,Research Centre for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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27
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Schaber J, Xiang R, Arnold A, Ryzhov A, Teichert J, Murcek P, Zwartek P, Ma S, Michel P. Impact of various cleaning procedures on p‐GaN surfaces. SURF INTERFACE ANAL 2023. [DOI: 10.1002/sia.7207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Affiliation(s)
- J. Schaber
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
- Department of Physical Chemistry Technische Universität Dresden
| | - R. Xiang
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
| | - A. Arnold
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
| | - A. Ryzhov
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
| | - J. Teichert
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
| | - P. Murcek
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
| | - P. Zwartek
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
| | - S. Ma
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
| | - P. Michel
- Helmholtz Zentrum Dresden Rossendorf Institute of Radiation Physics, ELBE
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28
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Xu H, Ma S. Palladium-Catalyzed [6+2] Double Allene Annulation for Benzazocines Synthesis. Angew Chem Int Ed Engl 2023; 62:e202213676. [PMID: 36372784 DOI: 10.1002/anie.202213676] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 09/16/2022] [Revised: 11/07/2022] [Accepted: 11/11/2022] [Indexed: 11/15/2022]
Abstract
An efficient double allene protocol for the formation of benzazocines has been developed. The reaction constitutes a highly regioselective palladium-catalyzed formal [6+2] annulation of allenyl benzoxazinanones with terminal allenes forming the challenging 8-membered cycles. Decent yields and excellent regioselectivity have been observed under mild conditions with a remarkable Z-stereoselectivity for the exo-cyclic C=C bonds. The synthetic potentials of benzazocine products have been demonstrated.
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Affiliation(s)
- 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.,University of Chinese Academy of Sciences, Beijing, 100049, 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.,Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, P. R. China
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29
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Zhao L, Luo Y, Xiao J, Huo X, Ma S, Zhang W. Stereodivergent Synthesis of Allenes with α,β‐Adjacent Central Chiralities Empowered by Synergistic Pd/Cu Catalysis. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202218146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Ling Zhao
- Shanghai Jiao Tong University - Minhang Campus: Shanghai Jiao Tong University School of Chemistry and Chemical Engineering 800 Dongchuan Road, Shanghai 200240, P. R. China 200240 Shanghai CHINA
| | - Yicong Luo
- Shanghai Jiao Tong University - Minhang Campus: Shanghai Jiao Tong University School of Chemistry and Chemical Engineering CHINA
| | - Junzhe Xiao
- Shanghai Institute of Organic Chemistry State Key Laboratory of Organometallic Chemistry CHINA
| | - Xiaohong Huo
- Shanghai Jiao Tong University - Minhang Campus: Shanghai Jiao Tong University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China 200240 Shanghai CHINA
| | - Shengming Ma
- Shanghai Institute of Organic Chemistry State Key Laboratory of Organometallic Chemistry CHINA
| | - Wanbin Zhang
- Shanghai Jiao Tong University School of Chemistry and Chemical Engineering 800 Dongchuan Road 200240 Shanghai CHINA
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30
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Zhang Q, Zhang J, Qian H, Ma S. Iron Nitrate and 4-OH-TEMPO-Cocatalyzed Aerobic Oxidation of Isochromans. Org Chem Front 2023. [DOI: 10.1039/d2qo01800d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
An efficient aerobic oxidation of isochromans and their derivatives with Fe(NO3)3•9H2O and 4-OH-TEMPO as catalysts at room temperature has been developed. The method provides a convenient approach to synthesize the...
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31
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Yu Y, Zhai D, Zhou Z, Jiang S, Qian H, Ma S. Copper-Catalyzed Aerobic Oxidation of Primary Alcohols to Carboxylic Acids. Chem Commun (Camb) 2023; 59:5281-5284. [PMID: 37060112 DOI: 10.1039/d3cc00963g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Here, the first copper-catalyzed aerobic oxidation of primary alcohols to carboxylic acids with TEMPO and KHSO4 as the co-catalysts has been developed. The reaction exhibits excellent substrate scope and functional...
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Affiliation(s)
- Yibo Yu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China.
| | - Di Zhai
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China.
| | - Zhengnan Zhou
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China.
| | - Sheng Jiang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China.
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, 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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Gong J, Gao J, Fu Y, Tang S, Cai Y, Yang J, Wu H, Ma S. Vertical distribution and major influencing factors of soil selenium in tropical climate: A case study of Chengmai County, Hainan Island. Chemosphere 2023; 312:137207. [PMID: 36370764 DOI: 10.1016/j.chemosphere.2022.137207] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/28/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
Soil selenium is of great significance to human health. Soil-forming parent rocks are the most critical factor that influences soil Se levels. Chengmai County, Hainan Island, has a tropical climate and diverse types of parent rocks, in which soil Se content is high. This study investigated the vertical distribution of soil Se from various parent rock substrates under tropical climatic conditions, and the factors that influence these soil Se contents, with 69 vertical soil profiles covering Chengmai County. The vertical distribution of soil Se and correlations with CIA (chemical alteration index), Al2O3, TFe2O3 (total iron oxide expressed as Fe2O3), total iodine, SOC (soil organic carbon), and pH were analysed. As per the results, the mean ± standard error of Se content in the A, B, and C horizons was 0.88 ± 0.13 mg/kg, 0.77 ± 0.08 mg/kg and 0.45 ± 0.05 mg/kg, respectively. The parent rock strictly controlled the horizon distribution of Se in the A-horizon. Soil Se showed A-B-horizons-enrichment in the vertical profile, especially in soil profiles overlying granite and basalt. It is hypothesised that the Se enriched in soils developed from the Tuolie Formation due to the release of Se from the weathering process of Se-rich rocks. Meanwhile, Se in soils developed from granite and basalt is more closely associated with exogenous input. Another crucial factor for the high level of Se in Chengmai County is the tropical climate, which has led the rocks to generally undergo intense chemical weathering. This results in soils rich in clay minerals and Fe/Al oxyhydroxides, which easily absorb and retain Se. Furthermore, the Se content of the B-horizon was generally higher than that of the A-horizon due to leaching. These results provide further knowledge and understanding of the geochemical behaviour of soil Se and guide the evaluation of Se-rich land resources under tropical climatic conditions.
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Affiliation(s)
- Jingjing Gong
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China.
| | - Jianweng Gao
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China
| | - Yangang Fu
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China
| | - Shixin Tang
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China.
| | - Yongwen Cai
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China
| | - Jianzhou Yang
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China
| | - Hui Wu
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China
| | - Shengming Ma
- Key Laboratory of Geochemical Exploration, Ministry of Nature Resources, Langfang, 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China
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Xu H, Ma S. Palladium‐Catalyzed [6+2] Double Allene Annulation for Benzazocines Synthesis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202213676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Haibo Xu
- SIOC: Shanghai Institute of Organic Chemistry LOMC CHINA
| | - Shengming Ma
- SIOC/Zhejiang University SKLOMC 345 Lingling Lu 200032 Shanghai CHINA
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Wang H, Li X, Xu L, Ren Y, Deng W, Feng H, Yang Z, Ma S, Ni Q, Kuang Y. The Feasibility of Quad-Modal PET/SPECT/Spectral-CT/CBCT On-Board Imaging in a Small-Animal Radiation Therapy Platform. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Yang J, Sun Y, Wang Z, Gong J, Gao J, Tang S, Ma S, Duan Z. Heavy metal pollution in agricultural soils of a typical volcanic area: Risk assessment and source appointment. Chemosphere 2022; 304:135340. [PMID: 35709847 DOI: 10.1016/j.chemosphere.2022.135340] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/10/2022] [Accepted: 06/11/2022] [Indexed: 06/15/2023]
Abstract
Heavy metals are naturally occurring elements with high natural background levels in the volcanic area. Therefore, it is necessary to conduct a risk assessment and identify potential sources of heavy metals. In this study, 4488 soil samples (0-20 cm) were collected in Chengmai County, a typical volcanic area in Hainan Province, and analyzed for eight heavy metals and major oxides. Pollution level, ecological risks, and health risks were evaluated by geo-accumulation index (Igeo), pollution index (PI), potential ecological risk index (RI), hazard index (HI), and carcinogenic risks (CR). The positive matrix factorization (PMF) model was further used to determine the priority source of heavy metals. The average values of heavy metal concentrations in soil were 7.06, 0.07, 156.88, 33.43, 0.05, 72.47, 19.48, and 67.51 mg kg-1 for As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn, respectively. Except for Pb, the average concentrations of all heavy metals exceeded background concentration in Hainan soils, indicating different degrees of heavy metal enrichment. The Igeo and PI showed that the main pollutant element in volcanic soils was Ni, followed by Cr and Cu. The RI shows that the percentage of soil samples with considerable or worse potential ecological risk was 44.4% of the total samples, with Hg, As, Cd, and Ni causing high ecological risks. The estimated average daily doses of heavy metals were below the tolerable limits and the HI values were below one for both adults and children, indicating that the residents had an acceptable potential non-carcinogenic risk. However, the potential carcinogenic risk of exposure to Cr, Ni, and As was unacceptable for residents, with high CR values exceeding 10-4, especially for children. Based on the PMF, five major sources of heavy metals were found in the study area: Ni, Cu, and Zn mainly from parent materials, As and Pb from daily life and vehicle emissions, Cd from agricultural activities, Hg from industrial activities, and Cr from parent materials under different environmental conditions. Significant positive correlations between Al2O3, TFe2O3, Mn, soil organic carbon (SOC), and heavy metals reflect that aluminium-rich minerals, Fe-Mn oxides, and SOC are the most critical factors affecting heavy metal accumulation in volcanic agricultural soils.
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Affiliation(s)
- Jianzhou Yang
- Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China; Key Laboratory of Geochemical Exploration Technology, Ministry of Natural Resources, Langfang, 065000, China.
| | - Yanling Sun
- School of Earth Sciences, China University of Geoscience, Wuhan, 430074, China
| | - Zhenliang Wang
- Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China; Key Laboratory of Geochemical Exploration Technology, Ministry of Natural Resources, Langfang, 065000, China
| | - Jingjing Gong
- Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China; Key Laboratory of Geochemical Exploration Technology, Ministry of Natural Resources, Langfang, 065000, China
| | - Jianweng Gao
- Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China; Key Laboratory of Geochemical Exploration Technology, Ministry of Natural Resources, Langfang, 065000, China
| | - Shixin Tang
- Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China; Key Laboratory of Geochemical Exploration Technology, Ministry of Natural Resources, Langfang, 065000, China
| | - Shengming Ma
- Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China; Key Laboratory of Geochemical Exploration Technology, Ministry of Natural Resources, Langfang, 065000, China
| | - Zhuang Duan
- Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, 065000, China; Key Laboratory of Geochemical Exploration Technology, Ministry of Natural Resources, Langfang, 065000, China
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Yang Z, Xu C, Ma S, Zhao RQ, Yang HM, Wang ZY. Effects of betaine supplementation on reproductive performance of breeding geese. Br Poult Sci 2022; 64:283-288. [PMID: 36164766 DOI: 10.1080/00071668.2022.2128988] [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] [Indexed: 11/02/2022]
Abstract
1. An experiment feeding three concentrations of betaine was conducted using breeding geese to analyse the reproductive performance, serum biochemical indexes, egg quality and intestinal immunity.2. A total of 450 female and 90 male Jiangnan White breeding geese were divided into three treatments, with five pen replicates each containing 30 female geese and 6 male geese.3. The results showed that there was no significant effect on the reproductive performance, serum biochemical indexes or jejunal villi goblet cells of geese with different levels of betaine in the diet (P>0.05). Compared with the control group, the addition of 2.5 g/kg betaine to the diet showed a tendency to increase egg mass (P>0.05) the betaine content in the yolk (P<0.05). Feeding betaine significantly increased the height of jejunal villi and egg yolk total cholesterol content in female geese (P<0.05).4. In conclusion, adding betaine to the goose diet was effective in its ability to improve intestinal structures and increase egg production. Adding 2.5 g/kg betaine to feed significantly increased the content of TCHOL and betaine in goose eggs.
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Affiliation(s)
- Z Yang
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - C Xu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - S Ma
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
| | - R Q Zhao
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
| | - H M Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - Z Y Wang
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China.,College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
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Han Y, Qin A, Zhang Q, Zhang X, Qian H, Ma S. Rhodium‐Catalyzed Dynamic Kinetic [4+2] Cycloaddition of Allene‐1,3‐Dienes. Angew Chem Int Ed Engl 2022; 61:e202211635. [DOI: 10.1002/anie.202211635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Yulin Han
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Anni Qin
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Qian Zhang
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Xue Zhang
- Shanghai Institute of Organic Chemistry SKLOMC 345 Lingling Road 200032 CHINA
| | - Hui Qian
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Shengming Ma
- SIOC/Zhejiang University SKLOMC 345 Lingling Lu 200032 Shanghai CHINA
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Han Y, Qin A, Zhang Q, Zhang X, Qian H, Ma S. Rhodium‐Catalyzed Dynamic Kinetic [4+2] Cycloaddition of Allene‐1,3‐Dienes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yulin Han
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Anni Qin
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Qian Zhang
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Xue Zhang
- Shanghai Institute of Organic Chemistry SKLOMC 345 Lingling Road 200032 CHINA
| | - Hui Qian
- Fudan University - Handan Campus: Fudan University Chemistry CHINA
| | - Shengming Ma
- SIOC/Zhejiang University SKLOMC 345 Lingling Lu 200032 Shanghai CHINA
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Xia B, Zhang M, Chen X, Jiang H, Wang J, Ye J, Ma S. EP14.01-021 Anlotinib Plus Irinotecan or Docetaxel in Small-Cell Lung Cancer (SCLC) Relapsed within Six Months: a Single-Arm Phase II Study. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.956] [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: 11/15/2022]
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Wu K, Chen X, Ma S. EP05.01-031 Lysimachia Capillipes Capilliposide C Enhances the Radiosensitivity of Lung Cancer by Promoting ERRFI1 via Inhibiting Phosphorylation of STAT3. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.478] [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: 11/25/2022]
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Shen J, Huang J, Li X, Xia B, Wang B, Yang S, Wu K, Zhang M, Wang J, Zhao P, Chen X, Ma S. EP08.02-136 Final Analysis of a Phase II Study: Anlotinib Plus Docetaxel in Patients with Previously Treated Metastatic Non-small Cell Lung Cancer. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Pan K, Zhu L, Wang B, Xu X, Ma S, Xia B. EP10.01-001 Hypofractionated Stereotactic Radiotherapy for Brain Metastases in Lung Cancer: Dose-Response Effect and Toxicity. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.878] [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: 11/26/2022]
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43
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Xu Y, Zhu L, Ma S. EP08.02-167 Diverse Effects of Radiotherapy for Osimertinib Acquired Resistance Non-small Cell Lung Cancer: Gene Matters. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Chen S, Su Z, Ma S, Sun Z, Liu X, Huang M. 375P The co-mutations and genetic features of BRAF-mutated gene mutations in a large Chinese MSS colorectal cancer cohort. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.513] [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: 11/01/2022] Open
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Ma C, Li C, Bai J, Xiao J, Zhai Y, Guo Y, Ma S. Rhodium-Catalyzed Intermolecular Stereoselective Allylation of Indoles with Allenes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chaoyan Ma
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, People’s Republic of China
| | - Can Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, People’s Republic of China
| | - Jiahui Bai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, People’s Republic of China
| | - Junzhe Xiao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, People’s Republic of China
| | - Yizhan Zhai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, People’s Republic of China
| | - Yinlong Guo
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, People’s Republic of China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, People’s Republic of China
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, People’s Republic of China
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, People’s Republic of China
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Mao Q, Ma S, Schrickel PL, Zhao P, Wang J, Zhang Y, Li S, Wang C. Review detection of Newcastle disease virus. Front Vet Sci 2022; 9:936251. [PMID: 35982920 PMCID: PMC9378970 DOI: 10.3389/fvets.2022.936251] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 05/05/2022] [Accepted: 07/11/2022] [Indexed: 11/15/2022] Open
Abstract
Newcastle disease (ND) is an acute and highly contagious disease caused by the Newcastle disease virus (NDV) infecting poultry, which has caused great harm to the poultry industry around the world. Rapid diagnosis of NDV is important to early treatment and early institution of control measures. In this review, we comprehensively summarize the most recent research into NDV, including historical overview, molecular structure, and infection mechanism. We then focus on detection strategies for NDV, including virus isolation, serological assays (such as hemagglutination and hemagglutination-inhibition tests, enzyme linked immunosorbent assay, reporter virus neutralization test, Immunofluorescence assay, and Immune colloidal gold technique), molecular assays (such as reverse transcription polymerase chain reaction, real-time quantitative PCR, and loop-mediated isothermal amplification) and other assays. The performance of the different serological and molecular biology assays currently available was also analyzed. To conclude, we examine the limitations of currently available strategies for the detection of NDV to lay the groundwork for new detection assays.
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Affiliation(s)
- Qian Mao
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Xianyang, China
| | - Shengming Ma
- Henan Joint International Research Laboratory of Veterinary Biologics Research and Application, Anyang Institute of Technology, Anyang, China
| | - Philip Luke Schrickel
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Xianyang, China
| | - Pengwei Zhao
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Xianyang, China
| | - Jingya Wang
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Xianyang, China
| | - Yuhua Zhang
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Xianyang, China
| | - Shuangyu Li
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Xianyang, China
| | - Chengbao Wang
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Xianyang, China
- *Correspondence: Chengbao Wang
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Abstract
Chiral organophosphorous compounds are very important in catalysis, organic syntheses, and medicinal chemistry. However, catalytic enantioselective protocols for the axially chiral allenyl phosphorus compounds have never been reported. Herein, a palladium-catalyzed enantioselective carbon-phosphorus bond formation reaction affording axially chiral allenyl phosphonates has been developed. The reaction enjoys high yields and ees accommodating a wide range of functional groups. Mechanistic studies have unveiled an overwhelming kinetic resolution process.
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Affiliation(s)
- Huanan Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Junliang Zhang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, 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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Wu DY, Feng L, Hao XY, Huang SB, Wu ZF, Ma S, Yin YL, Tan CQ. Effects of dietary supplementation of gestating sows with adenosine 5 '-monophosphate or adenosine on placental angiogenesis and vitality of their offspring. J Anim Sci 2022; 100:6628671. [PMID: 35781577 DOI: 10.1093/jas/skac237] [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: 04/29/2022] [Accepted: 07/01/2022] [Indexed: 11/12/2022] Open
Abstract
Our previous study found that dietary nucleotide supplementation, including adenosine 5 '-monophosphate (AMP), could increase AMP content in sow milk and promote piglet growth, but its effects on placental efficiency and piglet vitality remains unknown. This experiment aimed to investigate the effects of dietary AMP or its metabolite adenosine (ADO) supplementation on sow reproductive performance and placental angiogenesis. A total of 135 sows with a similar farrowing time were blocked by backfat and body weight (BW) at day 65 of gestation, and assigned to 1 of 3 dietary treatment groups (n = 45 per treatment): basal diet, basal diet supplemented with 0.1% AMP, or 0.1% ADO, respectively. Placental analysis and the characteristics of sows and piglets unveiled that compared with control (CON) group, AMP or ADO supplementation could improve sow placental efficiency (P<0.05) and newborn piglet vitality (P<0.05), increase piglet birth weight (P<0.05), and reduce stillbirth rate (P<0.05). More importantly, AMP or ADO supplementation could increase the contents of AMP, ADO, and their metabolites in placentae (P<0.05). Meanwhile, AMP or ADO supplementation could also increase placental vascular density (P<0.05) and the expression of vascular endothelial growth factor A (P<0.05), as well as promote the migration and tube formation of porcine iliac artery endothelial cells (P<0.05). Overall, maternal dietary AMP or ADO supplementation could increase their contents in the placenta, thereby improving placental angiogenesis and neonatal piglet vitality.
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Affiliation(s)
- D Y Wu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - L Feng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - X Y Hao
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - S B Huang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Z F Wu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - S Ma
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Y L Yin
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China.,National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China
| | - C Q Tan
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
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Wu Q, Ma S, Lin HD, Gao X. [Comparison of criteria for metabolically healthy overweight/obesity in Shanghai Changfeng study]. Zhonghua Nei Ke Za Zhi 2022; 61:771-778. [PMID: 35764560 DOI: 10.3760/cma.j.cn112138-20220106-00018] [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: 06/15/2023]
Abstract
Objective: To establish a more suitable and practicable criterion of metabolically healthy overweight/obesity (MHO/O) in Chinese, a comparison study on different criteria of MHO/O was conducted in subjects aged over 45-year-old in Shanghai Changfeng Community. Method: A total of 3 301 overweight/obese subjects over 45 years old (men 1 521, women 1 789) in Shanghai Changfeng Community was included in the study. According to the inclusion or exclusion of waist circumference (WC), homeostasis model assessment of insulin resistance (HOMA-IR) ≥2.5, and numbers of abnormal metabolic components, the MHO/O criteria were divided into 7 types: Adult Treatment Panel Ⅲ (ATP-Ⅲ) (with WC)<1 component, ATP-Ⅲ (with WC)<2 components, ATP-Ⅲ (with WC)<3 components, ATP-Ⅲ (without WC)<1 component, ATP-Ⅲ (without WC)<2 components, adjusted metabolic associated fatty liver disease (MAFLD) criteria<1 component, and adjusted MAFLD criteria<2 components. The prevalence of MHO/O and its relationship with the changes of body mass index (BMI), and the differences of the characteristics of MHO/O among the 7 types of metabolic health standards were compared. Result: The prevalence of MHO/O according to the ATP-Ⅲ (with WC)<1, ATP-Ⅲ (with WC)<2, ATP-Ⅲ (with WC)<3, ATP-Ⅲ (without WC)<1, ATP-Ⅲ (without WC)<2, adjusted MAFLD criteria<1, and adjusted MAFLD criteria<2 was 2.85%, 15.48%, 39.87%, 8.00%, 33.66%, 2.33%, 12.24%, respectively. The prevalence of MHO/O decreased as BMI increased. When BMI ≥ 28 kg/m2, the prevalence of MHO/O by ATP-Ⅲ (with WC)<1 and adjusted MAFLD criteria<1 dropped to 0. Conclusion: The adjusted MAFLD criterion without abnormal metabolic components is the most practicable definition of MHO/O.
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Affiliation(s)
- Q Wu
- Department of Endocrinology, Zhongshan Hospital, Fudan Institute for Metabolic Disease, Human Phenome Institute, Fudan University, Shanghai 200032, China
| | - S Ma
- Department of Endocrinology, Zhongshan Hospital, Fudan Institute for Metabolic Disease, Human Phenome Institute, Fudan University, Shanghai 200032, China
| | - H D Lin
- Department of Endocrinology, Zhongshan Hospital, Fudan Institute for Metabolic Disease, Human Phenome Institute, Fudan University, Shanghai 200032, China
| | - X Gao
- Department of Endocrinology, Zhongshan Hospital, Fudan Institute for Metabolic Disease, Human Phenome Institute, Fudan University, Shanghai 200032, China
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Liu Q, Zheng J, Zhang X, Ma S. Photo and copper dual catalysis for allene syntheses from propargylic derivatives via one-electron process. Nat Commun 2022; 13:3302. [PMID: 35676260 PMCID: PMC9177964 DOI: 10.1038/s41467-022-30655-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 10/27/2021] [Accepted: 05/06/2022] [Indexed: 11/09/2022] Open
Abstract
Different from the traditional two-electron oxidative addition-transmetalation-reductive elimination coupling strategy, visible light has been successfully integrated into transition metal-catalyzed coupling reaction of propargylic alcohol derivatives highly selectively forming allenenitriles: specifically speaking, visible light-mediated Cu-catalyzed cyanation of propargylic oxalates has been realized for the general, efficient, and exclusive syntheses of di-, tri, and tetra-substituted allenenitriles bearing various synthetically versatile functional groups. A set of mechanistic studies, including fluorescence quenching experiments, cyclic voltammetric measurements, radical trapping experiments, control experiments with different photocatalyst, and DFT calculation studies have proven that the current reaction proceeds via visible light-induced redox-neutral reductive quenching radical mechanism, which is a completely different approach as compared to the traditional transition metal-catalyzed two-electron oxidative addition processes.
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Affiliation(s)
- 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.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jian Zheng
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou, 310027, Zhejiang, P. R. China
| | - Xue Zhang
- 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
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China. .,Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China.
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