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Porras-Dominguez J, Lothier J, Limami AM, Tcherkez G. d-amino acids metabolism reflects the evolutionary origin of higher plants and their adaptation to the environment. Plant Cell Environ 2024; 47:1503-1512. [PMID: 38251436 DOI: 10.1111/pce.14826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 01/07/2024] [Accepted: 01/08/2024] [Indexed: 01/23/2024]
Abstract
d-amino acids are the d stereoisomers of the common l-amino acids found in proteins. Over the past two decades, the occurrence of d-amino acids in plants has been reported and circumstantial evidence for a role in various processes, including interaction with soil microorganisms or interference with cellular signalling, has been provided. However, examples are not numerous and d-amino acids can also be detrimental, some of them inhibiting growth and development. Thus, the persistence of d-amino acid metabolism in plants is rather surprising, and the evolutionary origins of d-amino acid metabolism are currently unclear. Systemic analysis of sequences associated with d-amino acid metabolism enzymes shows that they are not simply inherited from cyanobacterial metabolism. In fact, the history of plant d-amino acid metabolism enzymes likely involves multiple steps, cellular compartments, gene transfers and losses. Regardless of evolutionary steps, enzymes of d-amino acid metabolism, such as d-amino acid transferases or racemases, have been retained by higher plants and have not simply been eliminated, so it is likely that they fulfil important metabolic roles such as serine, folate or plastid peptidoglycan metabolism. We suggest that d-amino acid metabolism may have been critical to support metabolic functions required during the evolution of land plants.
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Affiliation(s)
- Jaime Porras-Dominguez
- Institut de Recherche en Horticulture et Semences, INRAe, Université d'Angers, Beaucouzé, France
| | - Jérémy Lothier
- Institut de Recherche en Horticulture et Semences, INRAe, Université d'Angers, Beaucouzé, France
| | - Anis M Limami
- Institut de Recherche en Horticulture et Semences, INRAe, Université d'Angers, Beaucouzé, France
| | - Guillaume Tcherkez
- Institut de Recherche en Horticulture et Semences, INRAe, Université d'Angers, Beaucouzé, France
- Research School of Biology, Australian National University, Canberra, Australia
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2
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Chen CY, Lin TY, Chiu CF, Lee MM, Li WL, Chen MY, Hung TH, Zhang ZJ, Tsai HHG, Sun SS, Wu CG. Steric Effects on the Photovoltaic Performance of Panchromatic Ruthenium Sensitizers for Dye-Sensitized Solar Cells. ACS Appl Mater Interfaces 2024; 16:12647-12660. [PMID: 38437590 PMCID: PMC10941073 DOI: 10.1021/acsami.3c19298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 02/17/2024] [Accepted: 02/18/2024] [Indexed: 03/06/2024]
Abstract
Three new heteroleptic Ru complexes, CYC-B22, CYC-B23C, and CYC-B23T, were prepared as sensitizers for coadsorbent-free, panchromatic, and efficient dye-sensitized solar cells. They are simultaneously functionalized with highly conjugated anchoring and ancillary ligands to explore the electronic and steric effects on their photovoltaic characteristics. The coadsorbent-free device based on CYC-B22 achieved the best power conversion efficiency (PCE) of 8.63% and a panchromatic response extending to 850 nm. The two stereoisomers, CYC-B23C and CYC-B23T coordinated with an unsymmetrical anchoring ligand, display similar absorption properties and the same driving forces for electron injection as well as dye regeneration. Nevertheless, the devices show not only the remarkably distinct PCE (6.64% vs 8.38%) but also discernible stability. The molecular simulation for the two stereoisomers adsorbed on TiO2 clarifies the distinguishable distances (16.9 Å vs 19.0 Å) between the sulfur atoms in the NCS ligands and the surface of the TiO2, dominating the charge recombination dynamics and iodine binding and therefore the PCE and stability of the devices. This study on the steric effects caused by the highly conjugated and unsymmetrical anchoring ligand on the adsorption geometry and photovoltaic performance of the dyes paves a new way for advancing the molecular design of polypyridyl metal complex sensitizers.
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Affiliation(s)
- Chia-Yuan Chen
- Research
Center of New Generation Light Driven Photovoltaic Modules and, National Central University, Taoyuan 32001, Taiwan, R.O.C
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Ting-Yi Lin
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Chi-Feng Chiu
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Mandy M. Lee
- Institute
of Chemistry, Academia Sinica, No. 128, Academia Road, Sec. 2,
Nankang, Taipei 115, Taiwan, R.O.C
| | - Wei-Long Li
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Min-Yu Chen
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Tzu-Hao Hung
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Zhao-Jie Zhang
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Hui-Hsu Gavin Tsai
- Research
Center of New Generation Light Driven Photovoltaic Modules and, National Central University, Taoyuan 32001, Taiwan, R.O.C
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
| | - Shih-Sheng Sun
- Institute
of Chemistry, Academia Sinica, No. 128, Academia Road, Sec. 2,
Nankang, Taipei 115, Taiwan, R.O.C
| | - Chun-Guey Wu
- Research
Center of New Generation Light Driven Photovoltaic Modules and, National Central University, Taoyuan 32001, Taiwan, R.O.C
- Department
of Chemistry, National Central University, Taoyuan 32001, Taiwan, R.O.C
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3
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Kumar P, Vats J, Kaur K, Sharma J, Johar S. Evaluation of the three different doses of cisatracurium during general anaesthesia: A prospective randomized study. J Anaesthesiol Clin Pharmacol 2024; 40:69-74. [PMID: 38666183 PMCID: PMC11042083 DOI: 10.4103/joacp.joacp_253_22] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 10/22/2022] [Accepted: 12/09/2022] [Indexed: 04/28/2024] Open
Abstract
Background and Aims The present study was conducted to determine the optimal dose of cisatracurium for intubating conditions and onset and offset of neuromuscular blockade. Data in Indian population are scarce, and hence, the present study was planned to evaluate different doses of cisatracurium. Material and Methods The prospective randomized double-blind study was conducted on 180 patients of either sex in the age group of 20-60 yrs., having physical status class I to III, scheduled for surgery under general anesthesia. After exclusion 154 patients were randomly divided into three groups comprising 52, 51, and 51, respectively, in Group A, Group B, and group C. They received 0.1 mgkg-1, 0.2 mgkg-1, and 0.3 mgkg-1 of cisatracurium, respectively, to facilitate endotracheal intubation. Time of onset, intubating conditions, hemodynamic parameters, signs of histamine release, and recovery time were noted. Results Mean time to onset was maximum in group A (4.37 ± 0.48 minutes) and minimum in group C (2.33 ± 0.43 minutes). Intubating conditions were found excellent in 88% patients in group. Change in HR was found to be non-significant at all time periods, but decrease in MAP was found between 2 and 10 minutes in group C. Duration of action was longest in group C. Conclusion We conclude that cisatracurium in dose of 0.2 mgkg-1 and 0.3 mgkg-1 provides good-to-excellent intubating conditions within less than 3 minutes.
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Affiliation(s)
- Prashant Kumar
- Department of Anaesthesiology and Critical Care, Pt. B.D. Sharma PGIMS, Rohtak, Haryana, India
| | - Jyoti Vats
- Department of Anaesthesiology and Critical Care, Pt. B.D. Sharma PGIMS, Rohtak, Haryana, India
| | - Kiranpreet Kaur
- Department of Anaesthesiology and Critical Care, Pt. B.D. Sharma PGIMS, Rohtak, Haryana, India
| | - Jyoti Sharma
- Department of Anaesthesiology, AIIMS Bhatinda, Punjab, India
| | - Sanjay Johar
- Department of Anaesthesiology and Critical Care, Pt. B.D. Sharma PGIMS, Rohtak, Haryana, India
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D’Acquarica I, Agranat I. The Quest for Secondary Pharmaceuticals: Drug Repurposing/Chiral-Switches Combination Strategy. ACS Pharmacol Transl Sci 2023; 6:201-219. [PMID: 36798472 PMCID: PMC9926527 DOI: 10.1021/acsptsci.2c00151] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 07/21/2022] [Indexed: 01/19/2023]
Abstract
Drug repurposing toward new medical uses and chiral switches are elements of secondary pharmaceuticals. The drug repurposing and chiral-switches strategies have mostly been applied independently in drug discovery. Drug repurposing has peaked in the search for therapeutic treatments of the Coronavirus Disease 2019 pandemic, whereas chiral switches have been overlooked. The current Perspective introduces the drug repurposing/chiral-switches combination strategy, overviewing representative cases of chiral drugs that have undergone this combination: ketamine, flurbiprofen, fenfluramine, and milnacipran. The deuterium-enabled chiral switches of racemic thalidomide analogs, a variation of the repurposing/chiral-switch combination strategy, is also included. Patenting and regulatory-exclusivity considerations of the combination strategy in the discovery of new medical uses are considered. The proposed combination creates a new synergy of its two elements, overcoming arguments against chiral switches, with better prospects for validation of patents and regulatory exclusivities. The combination strategy may be applied to chiral switches to paired enantiomers. Repurposing/chiral-switch drugs may be 'obvious-to-try'; however, their inventions may be unexpected and their patents nonobvious. Patenting repurposing/chiral-switch combination drugs is not 'evergreening', 'product hopping', and 'me-too'. The expected benefits and opportunities of the combined repurposing/chiral-switch strategy vis-à-vis its two elements are superior pharmacological properties, overcoming arguments against patent validities, challenges of chiral-switch patents, reduced expenses, shortened approval procedures, and higher expectations of regulatory exclusivities.
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Affiliation(s)
- Ilaria D’Acquarica
- Dipartimento
di Chimica e Tecnologie del Farmaco, Sapienza
Università di Roma, 00185 Rome, Italy
| | - Israel Agranat
- Organic
Chemistry, Institute of Chemistry, The Hebrew
University of Jerusalem, Edmond J. Safra Campus, Jerusalem 9190401, Israel
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5
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Liu J, Li T, Li R, Wang J, Li P, Niu M, Zhang L, Li C, Wang T, Xiao X, Wang JB, Wang Y. Hepatic Organoid-Based High-Content Imaging Boosts Evaluation of Stereoisomerism-Dependent Hepatotoxicity of Stilbenes in Herbal Medicines. Front Pharmacol 2022; 13:862830. [PMID: 35656304 PMCID: PMC9152290 DOI: 10.3389/fphar.2022.862830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/28/2022] [Indexed: 11/13/2022] Open
Abstract
The complexity of chemical components of herbal medicines often causes great barriers to toxicity research. In our previous study, we have found the critical divergent hepatotoxic potential of a pair of stilbene isomers in a famous traditional Chinese herb, Polygonum multiflorum (Heshouwu in Chinese). However, the high-throughput in vitro evaluation for such stereoisomerism-dependent hepatotoxicity is a critical challenge. In this study, we used a hepatic organoids–based in vitro hepatotoxic evaluation system in conjunction with using high content imaging to differentiate in vivo organ hepatotoxicity of the 2,3,5,4′-tetrahydroxy-trans-stilbene-2-O-β-glucoside (trans-SG) and its cis-isomer (cis-SG). By using such an organoid platform, we successfully differentiated the two stereoisomers’ hepatotoxic potentials, which were in accordance with their differences in rodents and humans. The lesion mechanism of the toxic isomer (cis-SG) was further found as the mitochondrial injury by high-content imaging, and its hepatotoxicity could be dose-dependently inhibited by the mitochondrial protective agent. These results demonstrated the utility of the organoids-based high-content imaging approach in evaluating and predicting organ toxicity of natural products in a low-cost and high-throughput way. It also suggested the rationale to use long-term cultured organoids as an alternative toxicology platform to identify early and cautiously the hepatotoxic new drug candidates in the preclinical phase.
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Affiliation(s)
- Juan Liu
- Hepato-Pancreato-Biliary Center, Beijing Tsinghua Changgung Hospital, Tsinghua University, Beijing, China
| | - Tingting Li
- Integrative Medical Center, The Fifth Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Ruihong Li
- Stem Cells and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, Beijing, China
| | - Jie Wang
- Stem Cells and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, Beijing, China
| | - Pengyan Li
- Integrative Medical Center, The Fifth Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Ming Niu
- Integrative Medical Center, The Fifth Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Le Zhang
- Integrative Medical Center, The Fifth Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Chunyu Li
- Integrative Medical Center, The Fifth Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Tao Wang
- Nephrology Combined with Traditional Chinese and Western Medicine, The First Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiaohe Xiao
- Integrative Medical Center, The Fifth Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Jia-Bo Wang
- Integrative Medical Center, The Fifth Medical Centre, Chinese PLA General Hospital, Beijing, China.,School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Yunfang Wang
- Hepato-Pancreato-Biliary Center, Beijing Tsinghua Changgung Hospital, Tsinghua University, Beijing, China
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Luo J, Yi G, Liu S, Mei Y, Chen W, Hou J, Zhang F, Yang T, Li H, Li X. Juvenile Hormone III R Stereoisomer Is Specifically Synthesized by Honeybees ( Apis mellifera ligustica) and Shows a Higher Biological Activity in Regulating Their Social Behavior. J Agric Food Chem 2022; 70:6097-6107. [PMID: 35544752 DOI: 10.1021/acs.jafc.2c00762] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The juvenile hormone (JH) plays a key role in the development of honeybee larvae and the alteration of adult behavior. Verification methods of types and stereoisomers of JHs in honeybees were established in this study. The regulatory modes of different stereoisomers of JH III on the social behaviors of honeybees were revealed by the disparity of interaction and RNA-seq. This result represented the first assessment of the effects of R-JH III and S-JH III in honeybee interactions; the former (367 times in total) was significantly higher than the latter (235 times in total); honeybees with high JH titers are always welcome in the colony because the effect of JH III on bees involves the sensing and signaling of hormones, and R-JH III is much more active than S-JH III in this regulation. Efficient R-JH III may be the insurance for bees to establish their social system advantages.
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Affiliation(s)
- Jie Luo
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Guoqiang Yi
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Sheng Liu
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Yong Mei
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Weiwei Chen
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Jiangan Hou
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Fu Zhang
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Taiyi Yang
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Honghong Li
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Xuesheng Li
- Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, Guangxi University, Nanning, Guangxi 530004, China
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7
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Lin HY, Ni CK. Structural Determination of Polysaccharides Lichenin Using Logically Derived Sequence Tandem Mass Spectrometry. J Am Soc Mass Spectrom 2022; 33:335-346. [PMID: 34965721 DOI: 10.1021/jasms.1c00325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A new mass spectrometry method, logically derived sequence (LODES) tandem mass spectrometry (MSn), was applied to determine the primary structure of polysaccharide lichenin. Conventional polysaccharide structural analysis requires complex processes, including derivation, permethylation, gas chromatography-mass spectrometry, and nuclear magnetic resonance spectrometry. Many of these processes can be replaced by LODES/MSn. In this new method, polysaccharides are hydrolyzed into monosaccharides, disaccharides, and oligosaccharides, and structures of these molecules are determined using LODES/MSn. The application of LODES/MSn for determination of primary structure of polysaccharide lichenin was demonstrated. The repeating unit of lichenin was determined to be An-Bn, where A represents β-Glc-(1 → 4)-β-Glc-(1 → 4)-β-Glc-(1 → 3)-Glc, B represents β-Glc-(1 → 4)-β-Glc-(1 → 4)-β-Glc-(1 → 4)-β-Glc-(1 → 3)-Glc, n is an integral, and n ≥ 2 exists but n = 1 cannot be excluded. LODES/MSn, which substantially reduces the time, effort, and sample quantity necessary for structural determination of oligosaccharides, is a powerful tool for polysaccharide primary structural determination.
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Affiliation(s)
- Hou-Yu Lin
- Institute of Atomic and Molecular Sciences, Academia Sinica, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Chi-Kung Ni
- Institute of Atomic and Molecular Sciences, Academia Sinica, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
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8
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Yu M, Jia X, Lin D, Du X, Jin D, Wei Y, Xie L, Huang W. Stereoisomer-Independent Stable Blue Emission in Axial Chiral Difluorenol. Front Chem 2021; 9:717892. [PMID: 34540799 PMCID: PMC8446198 DOI: 10.3389/fchem.2021.717892] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 07/20/2021] [Indexed: 12/04/2022] Open
Abstract
Bulky conjugated molecules with high stability are the prerequisite for the overall improvement of performance in wide-bandgap semiconductors. Herein, a chiral difluorenol, 2,2′-(9,9′-spirobi[fluorene]-2,2′-diyl)bis(9-(4-(octyloxy)phenyl)-9H-fluoren-9-ol) (DOHSBF), is set as a desirable model to reveal the stereoisomeric effects of wide-bandgap molecules toward controlling photophysical behavior and improving thermal and optical stability. Three diastereomers are obtained and elucidated by NMR spectra. Interestingly, the effect of modifying the stereo-centers is not observed on optical properties in solutions, pristine films, or post-treated film states. All three diastereomers as well as the mixture exhibit excellent spectral stability without undesirable green emission. Therefore, this stereoisomer-independent blue-emitting difluorenol will be a promising candidate for next-generation wide-bandgap semiconductors that would have extensive application in organic photonics.
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Affiliation(s)
- Mengna Yu
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Xiong Jia
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Dongqing Lin
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Xue Du
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Dong Jin
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Ying Wei
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Linghai Xie
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China.,Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University (NPU), Xi'an, China
| | - Wei Huang
- Center for Molecular Systems and Organic Devices (CMSOD), State Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, China.,Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University (NPU), Xi'an, China
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9
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Munir R, Javid N, Zia-ur-Rehman M, Zaheer M, Huma R, Roohi A, Athar MM. Synthesis of Novel N-Acylhydrazones and Their C-N/N-N Bond Conformational Characterization by NMR Spectroscopy. Molecules 2021; 26:molecules26164908. [PMID: 34443493 PMCID: PMC8399016 DOI: 10.3390/molecules26164908] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 11/21/2022] Open
Abstract
In this article, a synthesis of N’-(benzylidene)-2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetohydrazides and their structural interpretation by NMR experiments is described in an attempt to explain the duplication of some peaks in their 1H- and 13C-NMR spectra. Twenty new 6-methyl-1H-pyrazolo[3,4-b]quinoline substituted N-acylhydrazones 6(a–t) were synthesized from 2-chloro-6-methylquinoline-3-carbaldehyde (1) in four steps. 2-Chloro-6-methylquinoline-3-carbaldehyde (1) afforded 6-methyl-1H-pyrazolo[3,4-b]quinoline (2), which upon N-alkylation yielded 2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetate (3). The hydrazinolysis of 3 followed by the condensation of resulting 2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetohydrazide (4) with aromatic aldehydes gave N-acylhydrazones 6(a–t). Structures of the synthesized compounds were established by readily available techniques such as FT-IR, NMR and mass spectral studies. The stereochemical behavior of 6(a–t) was studied in dimethyl sulfoxide-d6 solvent by means of 1H NMR and 13C NMR techniques at room temperature. NMR spectra revealed the presence of N’-(benzylidene)-2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetohydrazides as a mixture of two conformers, i.e., E(C=N)(N-N) synperiplanar and E(C=N)(N-N)antiperiplanar at room temperature in DMSO-d6. The ratio of both conformers was also calculated and E(C=N) (N-N) syn-periplanar conformer was established to be in higher percentage in equilibrium with the E(C=N) (N-N)anti-periplanar form.
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Affiliation(s)
- Rubina Munir
- Institute of Chemistry, University of the Punjab, Lahore 54590, Pakistan;
- Department of Chemistry, Kinnaird College for Women, Lahore 54000, Pakistan; (R.H.); (A.R.)
- Correspondence: or (R.M.); (M.Z.R.)
| | - Noman Javid
- Department of Chemistry (C-Block), Forman Christian College, Ferozepur Road, Lahore 54600, Pakistan;
| | - Muhammad Zia-ur-Rehman
- Applied Chemistry Research Centre, PCSIR Laboratories Complex, Lahore 54600, Pakistan;
- Correspondence: or (R.M.); (M.Z.R.)
| | - Muhammad Zaheer
- Applied Chemistry Research Centre, PCSIR Laboratories Complex, Lahore 54600, Pakistan;
| | - Rahila Huma
- Department of Chemistry, Kinnaird College for Women, Lahore 54000, Pakistan; (R.H.); (A.R.)
| | - Ayesha Roohi
- Department of Chemistry, Kinnaird College for Women, Lahore 54000, Pakistan; (R.H.); (A.R.)
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10
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Miranda IL, Dos Santos PHC, Kohlhoff M, Purgato GA, Diaz MAN, Diaz-Muñoz G. Stereoselective synthesis of (-)-cytoxazone and its unnatural congener (+)-5-epi-cytoxazone. Chirality 2021; 33:479-489. [PMID: 34213029 DOI: 10.1002/chir.23334] [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: 09/12/2020] [Revised: 05/11/2021] [Accepted: 05/28/2021] [Indexed: 11/09/2022]
Abstract
An interesting protocol for stereoselective synthesis of (-)-cytoxazone and its unnatural stereoisomer (+)-5-epi-cytoxazone from d-4-hydroxyphenylglycine in overall yields of 10% and 16%, respectively, is described. The stereoselective addition of cyanide to an N-Boc protected aminoaldehyde (tert-butyl ((R)-1-(4-methoxyphenyl)-2-oxoethyl)carbamate) (5) constitutes the key step in this approach, producing a mixture of cyanohydrins 6a and b (1,2-anti and 1,2-syn tert-butyl (2-cyano-2-hydroxy-1-(4-methoxyphenyl)ethyl)carbamate) in 89% yield, with reasonable stereoselectivity (1.0:1.8) in favor of the anti-Felkin product (1,2-syn). A one-pot sequence of three successive steps from this mixture produced the oxazolidinone isomers 9a and b ((4R,5R)- and (4R,5S)-4-(4-methoxyphenyl)-2-oxooxazolidine-5-carboxylate). Chromatographic column separation and reduction of the ester function of both precursors led to (-)-cytoxazone and (+)-5-epi-cytoxazone.
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Affiliation(s)
- Izabel Luzia Miranda
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Markus Kohlhoff
- Chemistry of Bioactive Natural Products, René Rachou Institute, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
| | - Gislaine Aparecida Purgato
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Marisa Alves Nogueira Diaz
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Gaspar Diaz-Muñoz
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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11
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Mordechay S, Smullen S, Evans P, Genin O, Pines M, Halevy O. Differential Effects of Halofuginone Enantiomers on Muscle Fibrosis and Histopathology in Duchenne Muscular Dystrophy. Int J Mol Sci 2021; 22:7063. [PMID: 34209117 DOI: 10.3390/ijms22137063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/25/2021] [Accepted: 06/29/2021] [Indexed: 11/24/2022] Open
Abstract
Progressive loss of muscle and muscle function is associated with significant fibrosis in Duchenne muscular dystrophy (DMD) patients. Halofuginone, an analog of febrifugine, prevents fibrosis in various animal models, including those of muscular dystrophies. Effects of (+)/(−)-halofuginone enantiomers on motor coordination and diaphragm histopathology in mdx mice, the mouse model for DMD, were examined. Four-week-old male mice were treated with racemic halofuginone, or its separate enantiomers, for 10 weeks. Controls were treated with saline. Racemic halofuginone-treated mice demonstrated better motor coordination and balance than controls. However, (+)-halofuginone surpassed the racemic form’s effect. No effect was observed for (−)-halofuginone, which behaved like the control. A significant reduction in collagen content and degenerative areas, and an increase in utrophin levels were observed in diaphragms of mice treated with racemic halofuginone. Again, (+)-halofuginone was more effective than the racemic form, whereas (−)-halofuginone had no effect. Both racemic and (+)-halofuginone increased diaphragm myofiber diameters, with no effect for (−)-halofuginone. No effects were observed for any of the compounds tested in an in-vitro cell viability assay. These results, demonstrating a differential effect of the halofuginone enantiomers and superiority of (+)-halofuginone, are of great importance for future use of (+)-halofuginone as a DMD antifibrotic therapy.
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12
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Kuchan MJ, DeMichele SJ, Schimpf KJ, Chen X. α-Tocopherol Stereoisomer Profiles in Matched Human Maternal and Umbilical Cord Plasma. Curr Dev Nutr 2021; 5:nzab073. [PMID: 34104848 PMCID: PMC8178107 DOI: 10.1093/cdn/nzab073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 04/13/2021] [Accepted: 04/26/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND α-Tocopherol (αT) is essential for fetal development. One study has shown that the human placenta preferentially transfers the natural stereoisomer, RRR-αT. But prenatal supplements generally contain synthetic αT (S-αT). OBJECTIVES We aimed to determine if umbilical cord plasma is enriched for RRR-αT in racially diverse neonates from both uncomplicated and complicated pregnancies and if cord RRR-αT enrichment is impacted by maternal αT stereoisomer profile. METHODS We measured αT and αT stereoisomers in plasma from a randomly selected subset of 66 predominantly black and Hispanic maternal-fetal pairs from the Camden Study involving control (n = 28) and complicated pregnancies (n = 38). We collected maternal plasma at study entry (week 16 gestation; w16) and week 28 gestation (w28) and cord plasma at birth. RESULTS RRR-αT was the predominant stereoisomer in all maternal and cord plasma samples, but S-αT stereoisomers were found in most samples and comprised a high percentage of αT in some maternal-neonate pairs. Cord plasma had a higher percentage RRR-αT (P < 0.05) and lower percentage S-αT (P < 0.0001) than w28 plasma. Pregnancy status did not impact maternal or cord plasma concentrations of αT, RRR-αT, or S-αT; except plasma from complicated pregnancies was higher in S-αT at w28 than at w16 (P < 0.05). Maternal w28 αT did not correlate with cord αT. However, both maternal w28 αT and S-αT positively correlated with both cord S-αT (r = 0.340, P = 0.0049; r = 0.538, P < 0.00001) and percentage S-αT (r = 0.399, P = 0.001; r = 0.786, P < 0.00001) but negatively correlated with cord percentage RRR-αT (r = -0.399, P = 0.0009; r = -0.786, P < 0.00001). CONCLUSIONS The proportion of RRR-αT was higher in cord compared with maternal plasma in both uncomplicated and complicated pregnancies. Our data suggest that maternal S-αT raises cord S-αT and decreases the proportion of RRR-αT in the neonatal circulation. Because the bioactivities of RRR-αT and S-αT differ, this warrants future research to determine the importance of our observations to neonatal αT status.
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Affiliation(s)
| | | | - Karen J Schimpf
- Abbott Nutrition, Analytical Research and Development, Columbus, OH, USA
| | - Xinhua Chen
- Department of Obstetrics/Gynecology, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
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13
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Kuchan MJ, Ranard KM, Dey P, Jeon S, Sasaki GY, Schimpf KJ, Bruno RS, Neuringer M, Erdman JW. Infant Rhesus Macaque Brain α-Tocopherol Stereoisomer Profile Is Differentially Impacted by the Source of α-Tocopherol in Infant Formula. J Nutr 2020; 150:2305-2313. [PMID: 32614402 PMCID: PMC7467853 DOI: 10.1093/jn/nxaa174] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 04/17/2020] [Accepted: 05/27/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND α-Tocopherol (αT) in its natural form [2'R, 4'R, 8'R αT (RRR-αT)] is more bioactive than synthetic α-tocopherol (all rac-αT). All rac-αT is widely used in infant formulas, but its accretion in formula-fed infant brain is unknown. OBJECTIVE We sought to compare αT and stereoisomer status in infant rhesus macaques (Macaca mulatta) fed infant formula (RRR-αT or all rac-αT) with a reference group fed a mixed diet of breast milk and maternal diet. METHODS From 1 d after birth until 6 mo of age, infants (n = 23) were either nursery reared and exclusively fed 1 of 2 formulas by staff personnel or were community housed with their mothers and consumed a mixed reference diet of breast milk (69 mL/d at 6 mo) transitioning to monkey diet at ∼2 mo (MF; n = 8). Formulas contained either 21 μmol RRR-αT/L (NAT-F; n = 8) or 30 μmol all rac-αT/L (SYN-F; n = 7). Total αT and αT stereoisomers were analyzed in breast milk at 2, 4, and 6 mo and in monkey plasma and liver and 6 brain regions at 6 mo of age. α-Tocopherol transfer protein (α-TTP), lipoprotein αT, and urinary α-carboxyethyl-hydroxychroman (α-CEHC) were measured. One-way ANOVA with Tukey's post-hoc test was used for analysis. RESULTS At study termination, plasma, liver, lipoprotein, and brain total αT did not differ between groups. However, the NAT-F-fed group had higher RRR-αT than the SYN-F-fed group (P < 0.01) and the MF group (P < 0.0001) in plasma (1.7- and 2.7-fold) and brain (1.5- and 2.5-fold). Synthetic αT 2R stereoisomers (SYNTH-2R) were generally 3- and 7-fold lower in brain regions of the NAT-F group compared with those of the SYN-F and MF groups (P < 0.05). SYNTH-2R stereoisomers were 2-fold higher in MF than SYN-F (P < 0.0001). The plasma percentage of SYNTH-2R was negatively correlated with the brain percentage of RRR-αT (r = -0.99, P < 0.0001). Brain αT profiles were not explained by α-TTP mRNA or protein expression. Urine α-CEHC was 3 times higher in the NAT-F than in the MF group (P < 0.01). CONCLUSIONS Consumption of infant formulas with natural (NAT-F) compared with synthetic (SYN-F) αT differentially impacted brain αT stereoisomer profiles in infant rhesus macaques. Future studies should assess the functional implications of αT stereoisomer profiles on brain health.
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Affiliation(s)
| | - Katherine M Ranard
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, IL
| | - Priyankar Dey
- Human Nutrition Program, The Ohio State University, Columbus, OH
| | - Sookyoung Jeon
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, IL
| | - Geoff Y Sasaki
- Human Nutrition Program, The Ohio State University, Columbus, OH
| | | | - Richard S Bruno
- Human Nutrition Program, The Ohio State University, Columbus, OH
| | - Martha Neuringer
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, OR,Casey Eye Institute, Oregon Health & Science University, Portland OR
| | - John W Erdman
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, IL,Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL
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14
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Liu F, Wu Y, Li NP, Liu JW, Wang L, Ye WC. Chiral Isolation and Absolute Configuration of (+)- and (-)-Xanchryones F and G from Xanthostemon chrysanthus. Chem Biodivers 2019; 17:e1900683. [PMID: 31797569 DOI: 10.1002/cbdv.201900683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 12/04/2019] [Indexed: 01/24/2023]
Abstract
(+)- and (-)-Xanchryones F and G ((+)- and (-)-1 and 2) were isolated from the plant Xanthostemon chrysanthus by chiral separation. Compounds 1 and 2 featured a new carbon skeleton with cinnamoyltriketone-flavone adducts. Their structures with absolute configurations were elucidated by detailed spectroscopic analyses and chemical calculations. The antibacterial and anti-inflammatory activities of (+)- and (-)-1 and 2 were evaluated.
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Affiliation(s)
- Fen Liu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Yan Wu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Ni-Ping Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Jiao-Wen Liu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Lei Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
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15
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Cao M, De Mel N, Jiao Y, Howard J, Parthemore C, Korman S, Thompson C, Wendeler M, Liu D. Site-specific antibody-drug conjugate heterogeneity characterization and heterogeneity root cause analysis. MAbs 2019; 11:1064-1076. [PMID: 31198090 PMCID: PMC6748582 DOI: 10.1080/19420862.2019.1624127] [Citation(s) in RCA: 25] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Site-specific antibody-drug conjugates (ADCs) are designed to overcome the heterogeneity observed with first-generation ADCs that use random conjugation to surface-exposed lysine residues or conjugation to interchain disulfide bonds. Despite significantly enhanced homogeneity, however, the production of site-specific ADCs yields some process-related species heterogeneity, including stereoisomers, unconjugated antibody, underconjugated species, and overconjugated species. An elevated level of size variants, such as heavy chain-light chain species (half ADC), heavy chain-heavy chain-light chain species, and light chain species, is also observed with the final site-specific ADC product. To understand the root cause of heterogeneity generated during the ADC conjugation process, we designed time-course studies for each conjugation step, including reduction, oxidation, conjugation, and quenching. We developed both non-reduced peptide map and LabChip-based capillary electrophoresis sodium dodecyl sulfate methods for time-course sample analysis. On the basis of our time-course data, the half ADC and unconjugated antibody were generated during oxidation as a result of alternative disulfide bond arrangements. During oxidation, two hinge cysteines formed an intra-chain disulfide bond in the half ADC, and three inter-chain hinge disulfide bonds were formed in the unconjugated antibody. Time-course data also showed that the elevated level of size variants, especially heavy chain-heavy chain-light chain species and light chain species, resulted from the quenching step, where the quenching reagent engaged in a disulfide bond exchange reaction with the ADC and broke the disulfide bonds connecting the heavy chain and light chain. Underconjugated and overconjugated species arose from the equilibrium established during the conjugation reaction.
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Affiliation(s)
- Mingyan Cao
- a Department of Analytical Sciences, MedImmune , Gaithersburg , MD , USA
| | - Niluka De Mel
- a Department of Analytical Sciences, MedImmune , Gaithersburg , MD , USA
| | - Yang Jiao
- a Department of Analytical Sciences, MedImmune , Gaithersburg , MD , USA
| | - James Howard
- b Department of Purification Process Sciences, MedImmune , Gaithersburg , MD , USA
| | - Conner Parthemore
- a Department of Analytical Sciences, MedImmune , Gaithersburg , MD , USA
| | - Samuel Korman
- a Department of Analytical Sciences, MedImmune , Gaithersburg , MD , USA
| | - Christopher Thompson
- b Department of Purification Process Sciences, MedImmune , Gaithersburg , MD , USA
| | - Michaela Wendeler
- b Department of Purification Process Sciences, MedImmune , Gaithersburg , MD , USA
| | - Dengfeng Liu
- a Department of Analytical Sciences, MedImmune , Gaithersburg , MD , USA
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16
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Kodaka A, Hayakawa Y, AlSayegh RJ, Yasuhara T, Tomoda H, Oku T, Dan S, Tsuiji M, Tsuji T. Stereoisomer-Specific Induction of G2/M Phase Arrest and Apoptosis by 9-(E,Z)-Hydroxyoctadecadienoic Acid in Mouse Lymphoma Cells. Biol Pharm Bull 2019; 42:937-943. [PMID: 31155590 DOI: 10.1248/bpb.b18-00935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hydroxyoctadecadienoic acids (HODEs) are generated by oxidation of linoleic acid in vivo and thought to mediate various pathophysiological responses. In this study, we examined the effects of HODEs on EL4 mouse lymphoma cell growth and found that 9-(E,Z)-HODE inhibited EL4 cell growth in a dose-dependent manner, whereas no such growth inhibition was observed with other isomers (9-(E,E)-, 13-(Z,E)-, or 13-(E,E)-HODE), suggesting that the growth-inhibitory effect of HODEs was stereospecific. Analysis by flow cytometry (FACS) with annexin V and propidium iodide (PI) staining showed that 9-(E,Z)-HODE induced apoptosis with G2/M phase arrest. We next examined the growth inhibition profile of 9-(E,Z)-HODE against a panel of 39 human cancer cell lines (JFCR39). The fingerprint of growth inhibition by 9-(E,Z)-HODE exhibited a high degree of similarity to that by MLN4924, an inhibitor of NEDD8-activating enzyme. The intracellular NEDD8 (ubiquitin-like protein) expression in EL4 cells was decreased by the treatment with 9-(E,Z)-HODE as assessed by immunoblotting and flow cytometry. In conclusion, 9-(E,Z)-HODE specifically induced G2/M phase arrest and apoptosis, and the decrease of NEDD8 expression might be involved in this effect.
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Affiliation(s)
- Atsushi Kodaka
- Department of Microbiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences.,Bohsei Pharmacy
| | - Yuki Hayakawa
- Department of Microbiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Rawaa Jaffar AlSayegh
- Department of Microbiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | | | - Hiroshi Tomoda
- Graduate School of Pharmaceutical Sciences, Kitasato University
| | - Teruaki Oku
- Department of Microbiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Shingo Dan
- Molecular Pharmacology, Cancer Chemotherapy Center, Japan Foundation for Cancer Research
| | - Makoto Tsuiji
- Department of Microbiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Tsutomu Tsuji
- Department of Microbiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
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17
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Kuchan MJ, Moulton CJ, Dyer RA, Jensen SK, Schimpf KJ, Innis SM. RRR-α-Tocopherol Is the Predominant Stereoisomer of α-Tocopherol in Human Milk. Curr Dev Nutr 2018; 2:nzy055. [PMID: 30140787 PMCID: PMC6101621 DOI: 10.1093/cdn/nzy055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/26/2018] [Accepted: 06/12/2018] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND The naturally occurring α-tocopherol (α-T) stereoisomer, RRR-α-tocopherol (RRR-α-T), is known to be more bioactive than all-rac-α-tocopherol (all-rac-α-T), a synthetic racemic mixture of 8 stereoisomers. There is widespread use of all-rac-α-T in maternal supplements. OBJECTIVE The aim of the study was to thoroughly describe the α-T stereoisomer profile of human milk. METHODS We measured the α-T stereoisomer profile in milk from 2 cohorts of women: a cohort of 121 women who provided milk on days 30 and 60 of lactation (study 1) and a separate cohort of 51 women who provided milk on days 10, 21, 71, and 120 of lactation (study 2). RESULTS RRR-α-T was the predominant stereoisomer (P < 0.0001) in all samples in both studies despite a large intrasubject range in total α-T (0.7-22 μg/mL). On average, RRR-α-T comprised 73-76% of total α-T, but average values for the synthetic stereoisomers were RRS, 8-14%; RSR, 6-8%; RSS, 5-6%; and the sum of 2S stereoisomers (Σ2S), 3-5%. Despite the predominance of RRR-α-T, the sum of the synthetic stereoisomers comprised as much as 48% of total α-T. We calculated the ratio of RRR to the sum of the synthetic 2R (RRS + RSR + RSS) stereoisomers (s2R) to assess the degree to which RRR is favored in milk. Consistent with discrimination among 2R stereoisomers in mammary tissue, RRR/s2R values ranged from 2.8 to 3.6, as opposed to the expected ratio of 0.33 if there was no discrimination. However, the RRR to s2R ratio did not correlate with milk α-T concentration, but both components of the ratio did. CONCLUSIONS RRR-α-T is the predominant stereoisomer in human milk, concentrations of synthetic 2R stereoisomers were notable, and the relation between milk total α-T and stereoisomer profile is complex. Due to the wide range found in milk α-T stereoisomer profile, investigation into its impact on α-T status and functional outcomes in breastfed infants is warranted.
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Affiliation(s)
- Matthew J Kuchan
- Discovery Research and Development, Abbott Nutrition, Columbus, OH
| | | | - Roger A Dyer
- BC Children's Hospital Research Institute, Department of Pediatrics, University of British Columbia, Vancouver, Canada
| | - Soren K Jensen
- Department of Animal Science, Aarhus University, Tjele, Denmark
| | - Karen J Schimpf
- Analytical Research and Development, Abbott Nutrition, Columbus, OH
| | - Sheila M Innis
- BC Children's Hospital Research Institute, Department of Pediatrics, University of British Columbia, Vancouver, Canada
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18
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Berro LF, Shields H, Odabas-Geldiay M, Rothbaum BO, Andersen ML, Howell LL. Acute effects of 3,4-methylenedioxymethamphetamine (MDMA) and R(-) MDMA on actigraphy-based daytime activity and sleep parameters in rhesus monkeys. Exp Clin Psychopharmacol 2018; 26:410-420. [PMID: 29939048 PMCID: PMC6072597 DOI: 10.1037/pha0000196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
3,4-Methylenedioxymethamphetamine (MDMA) affects monoaminergic pathways that play a critical role in sleep-wake cycles. Dopaminergic mechanisms are thought to mediate the sleep-disrupting effects of stimulant drugs. However, the mechanisms underlying the effects of MDMA on sleep-wake cycles and the effects of R(-) MDMA, a stereoisomer that lacks dopaminergic activity, on sleep remain unknown. The aim of the present study was to investigate the effects of racemic MDMA and R(-) MDMA on daytime activity and sleep-like parameters evaluated with actigraphy in adult rhesus macaques (Macaca mulatta, n = 6). Actiwatch monitors were attached to the monkeys' collars and actigraphy recording was conducted during baseline conditions and after the administration of acute intramuscular injections of saline (vehicle), racemic MDMA (0.3, 1.0, or 1.7 mg/kg), or R(-) MDMA (0.3, 1.0, or 1.7 mg/kg) at 9 or 16 h (3 h before "lights off"). Morning treatments had no effects on sleep-like parameters. Racemic MDMA decreased general daytime activity during the first hour after injection and increased daytime activity at 3 hr posttreatment. Although afternoon administration of racemic MDMA increased sleep latency, it improved other sleep parameters, decreasing wake time after sleep onset (WASO) and increasing sleep efficiency for subjects with low baseline sleep efficiency. Afternoon treatment with R(-) MDMA improved sleep measures, increasing sleep efficiency and decreasing sleep latency and WASO, while having no effects on daytime activity. The stimulant and sleep-disrupting effects of racemic MDMA are likely mediated by dopaminergic and noradrenergic mechanisms, while serotonergic pathways appear to be involved in the sleep-promoting effects of MDMA. (PsycINFO Database Record
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Affiliation(s)
- Laís F. Berro
- Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329,Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, 2500 N State St, Jackson, MS, USA 39216
| | - Hannah Shields
- Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329
| | - Melis Odabas-Geldiay
- Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329
| | - Barbara O. Rothbaum
- Department of Psychiatry and Behavioral Science, Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329
| | - Monica L. Andersen
- Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329,Department of Psychobiology, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04021002 São Paulo, SP, Brazil
| | - Leonard L. Howell
- Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329,Department of Psychiatry and Behavioral Science, Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329,Correspondence: Leonard L. Howell, Yerkes National Primate Research Center, Emory University, 954 Gatewood Road N.E., Atlanta, GA, USA, 30329, Phone: (+1)404-727-7786, Fax: (+1)404-727-1266,
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19
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Zhong Y, Wang H, Yu Z, Geng X, Chen C, Li D, Zhu X, Zhen H, Huang W, Fennell DE, Young LY, Peng P. Dia stereoisomer-Specific Biotransformation of Hexabromocyclododecanes by a Mixed Culture Containing Dehalococcoides mccartyi Strain 195. Front Microbiol 2018; 9:1713. [PMID: 30131775 PMCID: PMC6090157 DOI: 10.3389/fmicb.2018.01713] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 07/09/2018] [Indexed: 11/15/2022] Open
Abstract
Hexabromocyclododecane (HBCD) stereoisomers may exhibit substantial differences in physicochemical, biological, and toxicological properties. However, there remains a lack of knowledge about stereoisomer-specific toxicity, metabolism, and environmental fate of HBCD. In this study, the biotransformation of (±)α-, (±)β-, and (±)γ-HBCD contained in technical HBCD by a mixed culture containing the organohalide-respiring bacterium Dehalococcoides mccartyi strain 195 was investigated. Results showed that the mixed culture was able to efficiently biotransform the technical HBCD mixture, with 75% of the initial HBCD (∼12 μM) in the growth medium being removed within 42 days. Based on the metabolites analysis, HBCD might be sequentially debrominated via dibromo elimination reaction to form tetrabromocyclododecene, dibromocyclododecadiene, and 1,5,9-cyclododecatriene. The biotransformation of the technical HBCD was likely diastereoisomer-specific. The transformation rates of α-, β-, and γ-HBCD were in the following order: α-HBCD > β-HBCD > γ-HBCD. The enantiomer fractions of (±)α-, (±)β-, and (±)γ-HBCD were maintained at about 0.5 during the 28 days of incubation, indicating a lack of enantioselective biotransformation of these diastereoisomers. Additionally, the amendment of another halogenated substrate tetrachloroethene (PCE), which supports the growth of strain 195, had a negligible impact on the transformation patterns of HBCD diastereoisomers and enantiomers. This study provided new insights into the stereoisomer-specific transformation patterns of HBCD by anaerobic microbes and has important implications for microbial remediation of anoxic environments contaminated by HBCD using the mixed culture containing Dehalococcoides.
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Affiliation(s)
- Yin Zhong
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
| | - Heli Wang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zhiqiang Yu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
| | - Xinhua Geng
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China
| | - Chengyu Chen
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Dan Li
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xifen Zhu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Huajun Zhen
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
| | - Weilin Huang
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
| | - Donna E Fennell
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
| | - Lily Y Young
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
| | - Ping'an Peng
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
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20
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Guo M, Guo G, Xiao J, Sheng X, Zhang X, Tie Y, Cheng YK, Ji X. Ginsenoside Rg3 stereoisomers differentially inhibit vascular smooth muscle cell proliferation and migration in diabetic atherosclerosis. J Cell Mol Med 2018; 22:3202-3214. [PMID: 29566305 PMCID: PMC5980205 DOI: 10.1111/jcmm.13601] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 01/17/2018] [Indexed: 01/13/2023] Open
Abstract
Ginsenoside 20(R/S)‐Rg3, as a natural peroxisome proliferator‐activated receptor gamma (PPARγ) ligand, has been reported to exhibit differential biological effects. It is of great interest to understand the stereochemical selectivity of 20(R/S)‐Rg3 and explore whether differential PPARγ activation by Rg3 stereoisomers, if it exists, could lead to differential physiological outcome and therapeutic effects in diabetic atherosclerosis. Here, we investigated the binding modes of 20(R/S)‐Rg3 stereoisomers in the PPARγ ligand‐binding domain (PPARγ‐LBD) using molecular modelling and their effects on smooth muscle cell proliferation and migration induced by advanced glycation end products (AGEs). The results revealed that 20(S)‐Rg3 exhibited stronger antiproliferative and antimigratory effects due to stronger PPARγ activation. To validate the in vitro results, we used a mice model with diabetic atherosclerosis and obtained that 20(S)‐Rg3 markedly reduced the plaque size secondary to reducing the proliferation and migration of VSMCs, while the plaques were more stable due to improvements in other plaque compositions. The results shed light on the structural difference between Rg3 stereoisomers that can lead to significant differential physiological outcome, and the (S)‐isomer seems to be the more potent isomer to be developed as a promising drug for diabetic atherosclerosis.
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Affiliation(s)
- Mengqi Guo
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Guanlun Guo
- Hubei Key Laboratory of Advanced Technology for Automotive Components & Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan, Hubei, China
| | - Jie Xiao
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xi Sheng
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xinyu Zhang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Yuanyuan Tie
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Yuen-Kit Cheng
- Department of Chemistry, Faculty of Science, Hong Kong Baptist University, Hong Kong city, Hong Kong
| | - Xiaoping Ji
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong, China
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21
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Abstract
Panax notoginseng (Sanqi), a traditional Chinese medical drug which has been applied to medical use for over four centuries, contains high content of dammarane-type tetracyclic triterpenoid saponins. A number of stereoisomeric dammarane-type saponins exist in this precious herb, and some are particularly regarded as “biomarkers” in processed notoginseng. Contemporary researches have indicated that some saponin stereoisomers may show stereospecific pharmacological activities, such as anti-tumor, antioxidative, anti-photoaging, anti-inflammatory, antidiabetic, and neuro-protective activities, as well as stereoselective effects on ion channel current regulation, cardiovascular system, and immune system. The current review provides a comprehensive overview of chemical compositions of raw and processed P. notoginseng with a particular emphasis on saponin stereoisomers. Besides, the pharmacological and pharmacokinetic researches, as well as determination and biotechnological preparation methods of stereoisomeric saponins in notoginseng are discussed extensively.
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Affiliation(s)
- Ming Peng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Department of Chemistry, Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Ya X Yi
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Tong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yue Ding
- Experiment Center for Teaching and Learning, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jian Le
- Department of Chemistry, Shanghai Institute for Food and Drug Control, Shanghai, China.,Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, China
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22
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Tsuchiya H, Mizogami M. Discrimination of Stereoisomers by Their Enantioselective Interactions with Chiral Cholesterol-Containing Membranes. Molecules 2017; 23:E49. [PMID: 29295605 DOI: 10.3390/molecules23010049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/22/2017] [Accepted: 12/22/2017] [Indexed: 12/02/2022] Open
Abstract
Discrimination between enantiomers is an important subject in medicinal and biological chemistry because they exhibit markedly different bioactivity and toxicity. Although stereoisomers should vary in the mechanistic interactions with chiral targets, their discrimination associated with the mode of action on membrane lipids is scarce. The aim of this study is to reveal whether enantiomers selectively act on chiral lipid membranes. Different classes of stereoisomers were subjected at 5–200 μM to reactions with biomimetic phospholipid membranes containing ~40 mol % cholesterol to endow the lipid bilayers with chirality and their membrane interactions were comparatively evaluated by measuring fluorescence polarization. All of the tested compounds interacted with cholesterol-containing membranes to modify their physicochemical property with different potencies between enantiomers, correlating to those of their experimental and clinical effects. The rank order of membrane interactivity was reversed by changing cholesterol to C3-epimeric α-cholesterol. The same selectivity was also obtained from membranes prepared with 5α-cholestan-3β-ol and 5β-cholestan-3α-ol diastereomers. The opposite configuration allows molecules to interact with chiral sterol-containing membranes enantioselectively, and the specific β configuration of cholesterol’s 3-hydroxyl group is responsible for such selectivity. The enantioselective membrane interaction has medicinal implications for the characterization of the stereostructures with higher bioactivity and lower toxicity.
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23
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Amino Y, Nishi S, Izawa K. Stereo-Selective Preparation of Teneraic Acid, trans-(2S,6S)-Piperidine-2,6-dicarboxylic Acid, via Anodic Oxidation and Cobalt-Catalyzed Carbonylation. Chem Pharm Bull (Tokyo) 2017; 65:854-861. [PMID: 28867713 DOI: 10.1248/cpb.c17-00391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Teneraic acid (piperidine-2,6-dicarboxylic acid) is a naturally occurring imino acid that comprises three stereoisomers due to its two asymmetric centers at C2 and C6. The configuration of natural teneraic acid is reported to correspond to trans-(2S,6S). However, a few studies are focused on the stereospecific synthesis of trans-(2S,6S)-teneraic acid. The present study investigates a convenient synthetic method that includes regiospecific anodic oxidation and stereospecific cobalt-catalyzed carbonylation to obtain trans-(2S,6S)-teneraic acid. Methyl (S)-N-benzoyl-α-methoxypipecolate, the key intermediate that displays a structure that corresponds to an intermediate (N-α-hydroxyalkyl amide) of intramolecular amidocarbonylation, was obtained via an anodic oxidation of methyl (S)-N-benzoylpipecolate. Subsequently, cobalt-catalyzed carbonylation converted the methyl (S)-N-benzoyl-α-methoxypipecolate to trans-(2S,6S)-N-benzoyl-teneraic acid dimethyl ester in good optical purity (>95% enantiomeric excess (ee)) and modest yield (63%). Finally, de-protection occurred via acidic hydrolysis to obtain trans-(2S,6S)-teneraic acid. The stereochemistry of synthesized teneraic acid was confirmed as corresponding to trans-(2S,6S) by comparing its physical properties with those of a cis-meso-isomer and those of a trans-(2S,6S)-isomer that were reported in previous studies.
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24
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Liu X, Song M, Gao Z, Cai X, Dixon W, Chen X, Cao Y, Xiao H. Stereoisomers of Astaxanthin Inhibit Human Colon Cancer Cell Growth by Inducing G2/M Cell Cycle Arrest and Apoptosis. J Agric Food Chem 2016; 64:7750-7759. [PMID: 27726394 DOI: 10.1021/acs.jafc.6b03636] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Astaxanthin (AST) is a xanthophyll carotenoid with potential protective effects against carcinogenesis. Different stereoisomers of AST (ASTs) exist in a variety of food sources. Due to limited information on the bioactivities of ASTs, the present study investigated the inhibitory effects of ASTs on HCT116 and HT29 human colon cancer cells. ASTs investigated herein included 3S,3'S (S) from Haematococcus pluvialis, 3R,3'R (R) from Phaffia rhodozyma, and a statistical mixture (S: meso: R = 1:2:1) (M) from synthetic AST. Cell viability assay showed that ASTs all inhibited colon cancer cell growth in a time-dependent (24-72 h) and dose-dependent (4-16 μM) manner, and there was no significant difference among the IC50 values of ASTs (p > 0.05). Flow cytometry analysis indicated that ASTs induced G2/M cell cycle arrest and cellular apoptosis in cancer cells. The cell cycle arrest caused by ASTs was associated with increases in the expression levels of p21Cip1/Waf1, p27, and p53, as well as decreases in the levels of CDK4 and CDK6. Meanwhile, the apoptosis induced by ASTs was confirmed by activation of caspase-3 and PARP in the cancer cells. The results indicated that hydroxyl (OH) at C3 and C3' of terminal ring structure might not be the major factor that affects the anticancer activity of AST. This study revealed important information on the inhibitory effects of ASTs on human colon cancer cells, which provided a basis for using ASTs as chemopreventive agents for colon cancer.
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Affiliation(s)
- Xiaojuan Liu
- Department of Food Science, College of Food Science, South China Agricultural University , Guangzhou 510642, China
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Mingyue Song
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Zili Gao
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Xiaokun Cai
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - William Dixon
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Xiaofeng Chen
- Department of Food Science, College of Food Science, South China Agricultural University , Guangzhou 510642, China
| | - Yong Cao
- Department of Food Science, College of Food Science, South China Agricultural University , Guangzhou 510642, China
| | - Hang Xiao
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
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25
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Yang B, Ren Q, Ma M, Chen QX, Hashimoto K. Antidepressant Effects of (+)-MK-801 and (-)-MK-801 in the Social Defeat Stress Model. Int J Neuropsychopharmacol 2016; 19:pyw080. [PMID: 27608811 PMCID: PMC5203762 DOI: 10.1093/ijnp/pyw080] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 08/18/2016] [Accepted: 09/05/2016] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Current data on antidepressant action of the N-methyl-D-aspartate receptor antagonist, (+)-MK-801, is inconsistent. This study was conducted to examine the effects of (+)-MK-801 and its less potent stereoisomer, (-)-MK-801, in the social defeat stress model of depression. METHODS The antidepressant effects of (+)-MK-801 (0.1mg/kg) and (-)-MK-801 (0.1mg/kg) in the social defeat stress model were examined. RESULTS In the tail suspension and forced swimming tests, both stereoisomers significantly attenuated increased immobility time in susceptible mice. In the sucrose preference test, (+)-MK-801, but not (-)-MK-801, significantly enhanced reduced sucrose consumption 2 or 4 days after a single dose. However, no antianhedonia effects were detected 7 days after a single dose of either stereoisomer. CONCLUSIONS Both stereoisomers of MK-801 induced rapid antidepressant effects in the social defeat stress model, although neither produced a long-lasting effect (7 days).
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Affiliation(s)
| | | | | | | | - Kenji Hashimoto
- Division of Clinical Neuroscience, Chiba University Center for Forensic Mental Health, Chiba, Japan (Dr Yang, Dr Ren, Ms Ma, and Dr Hashimoto); Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China (Drs Yang and Chen).
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26
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Mikie T, Saeki A, Yamazaki Y, Ikuma N, Kokubo K, Seki S. Stereochemistry of spiro-acetalized [60]fullerenes: how the exo and endo stereoisomers influence organic solar cell performance. ACS Appl Mater Interfaces 2015; 7:8915-8922. [PMID: 25856417 DOI: 10.1021/acsami.5b01818] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Exploiting bis-addition products of fullerenes is a rational way to improve the efficiency of bulk heterojunction-type organic photovoltaic cells (OPV); however, this design inherently produces regio- and stereoisomers that may impair the ultimate performance and fabrication reproducibility. Here, we report unprecedented exo and endo stereoisomers of the spiro-acetalized [60]fullerene monoadduct with methyl- or phenyl-substituted 1,3-dioxane (SAF6). Although there is no chiral carbon in either the reagent or the fullerene, equatorial (eq) rather than axial (ax) isomers are selectively produced at an exo-eq:endo-eq ratio of approximately 1:1 and can be easily separated using silica gel column chromatography. Nuclear Overhauser effect measurements identified the conformations of the straight exo isomer and bent endo isomer. We discuss the origin of stereoselectivity, the anomeric effect, intermolecular ordering in the film state, and the performance of poly(3-hexylthiophene):substituted SAF6 OPV devices. Despite their identical optical and electrochemical properties, their solubilities and space-charge limited current mobilities are largely influenced by the stereoisomers, which leads to variation in the OPV efficiency. This study emphasizes the importance of fullerene stereochemistry for understanding the relationship between stereochemical structures and device output.
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Affiliation(s)
- Tsubasa Mikie
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Akinori Saeki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yu Yamazaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naohiko Ikuma
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ken Kokubo
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shu Seki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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27
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Wu H, Yuan B, Liu YM. Chiral capillary electrophoresis-mass spectrometry of tetrahydroisoquinoline-derived neurotoxins: observation of complex stereoisomerism. J Chromatogr A 2011; 1218:3118-23. [PMID: 21470616 PMCID: PMC3088083 DOI: 10.1016/j.chroma.2011.03.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [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: 01/28/2011] [Revised: 03/08/2011] [Accepted: 03/14/2011] [Indexed: 11/29/2022]
Abstract
Previous studies have shown that certain 1,2,3,4-tetrahydroisoquinoline derivatives (TIQs) are neurotoxins inducing Parkinsonism. Further, individual enantiomers of these toxins such as (R/S)-N-methylsalsolinol ((R/S)-NMSal) possess distinct neurotoxicological properties. In this work, a chiral capillary electrophoresis (CE) method with electrospray ionization-tandem mass spectrometric (ESI-MS/MS) detection was developed for the quantification of TIQ enantiomers. Enantioseparation was achieved with sulfated β-cyclodextrin (sulfated β-CD) as chiral selector. To avoid any potential contamination of MS ionization source by the non-volatile chiral selector, partial filling technique was deployed in the CE separation. TIQ derivatives, including (R/S)-6,7-dihydroxy-1-methy-TIQ (salsolinol, Sal), (R/S)-1-benzyl-TIQ (BTIQ), and (R/S)-NMSal, were base-line resolved with resolution values (R) ranging from 3 (for Sal) to 4.5 (for BTIQ), which were much better than those reported previously by HPLC methods. ESI-MS/MS detection of the resolved TIQ enantiomers was specific and sensitive (LOD=1.2 μM for Sal enantiomers). The proposed chiral CE-MS/MS method was used to study in vitro formation of (R/S)-NMSal. It was found that NMSal was formed from the incubation of epinine (a dopamine metabolite) with acetaldehyde (a metabolite of alcohol). More interestingly, four isomers of NMSal were separated and detected in the incubation solution. They were identified as (R)-e.e-NMSal, (R)-e.a-NMSal, (S)-e.e-NMSal, and (S)-e.a-NMSal. This was the first lab evidence that this Parkinsonian neurotoxin exists in multiple isomeric forms.
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Affiliation(s)
- Hao Wu
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39110, USA
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28
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Forró E, Schönstein L, Kiss L, Vega-Peñaloza A, Juaristi E, Fülöp F. Direct enzymatic route for the preparation of novel enantiomerically enriched hydroxylated beta-amino ester stereoisomers. Molecules 2010; 15:3998-4010. [PMID: 20657421 PMCID: PMC6264416 DOI: 10.3390/molecules15063998] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 05/25/2010] [Accepted: 05/28/2010] [Indexed: 11/16/2022] Open
Abstract
Enantiomerically enriched hydroxy-substituted beta-amino esters have been synthesized through CAL-B-catalyzed enantioselective hydrolysis in organic media. Moderate to good enantiomeric excess values (ee > or = 52%) were obtained when the CAL-B-catalyzed reactions were performed in t-BuOMe, at 60 degrees C with 0.5 equiv. of added H(2)O as nucleophile.
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Affiliation(s)
- Enikő Forró
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - László Schönstein
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - Loránd Kiss
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - Alberto Vega-Peñaloza
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508 Col. San Pedro Zacatenco, 07360 México, D.F. Apartado Postal 14-740, 07000, D.F., Mexico
| | - Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508 Col. San Pedro Zacatenco, 07360 México, D.F. Apartado Postal 14-740, 07000, D.F., Mexico
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
- Research Group of Stereochemistry of the Hungarian Academy of Sciences, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
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29
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Sabitha G, Srinivas R, Das SK, Yadav JS. Synthesis of (3R,5R)-harzialactone A and its (3R,5S)-isomer. Beilstein J Org Chem 2010; 6:8. [PMID: 20485590 PMCID: PMC2871370 DOI: 10.3762/bjoc.6.8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Accepted: 01/20/2010] [Indexed: 11/26/2022] Open
Abstract
The total synthesis of (3R,5R)-harzialactone A (1) and its (3R,5S)-isomer (2) is described. Epoxide opening with thioacetal and diastereoselective reductions are used as key reactions.
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Affiliation(s)
- Gowravaram Sabitha
- Organic Division I, Indian Institute of Chemical Technology, Hyderabad 500 007, India.
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