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Zhang H, Xie F, Yuan XY, Dai XT, Tian YF, Sun MM, Yu SQ, Cai JY, Sun B, Zhang WC, Shan CL. Discovery of a nitroaromatic nannocystin with potent in vivo anticancer activity against colorectal cancer by targeting AKT1. Acta Pharmacol Sin 2024; 45:1044-1059. [PMID: 38326625 PMCID: PMC11053100 DOI: 10.1038/s41401-024-01231-w] [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: 09/13/2023] [Accepted: 01/19/2024] [Indexed: 02/09/2024] Open
Abstract
The development of targeted chemotherapeutic agents against colorectal cancer (CRC), one of the most common cancers with a high mortality rate, is in a constant need. Nannocystins are a family of myxobacterial secondary metabolites featuring a 21-membered depsipeptide ring. The in vitro anti-CRC activity of natural and synthetic nannocystins was well documented, but little is known about their in vivo efficacy and if positive, the underlying mechanism of action. In this study we synthesized a nitroaromatic nannocystin through improved preparation of a key fragment, and characterized its in vitro activity and in vivo efficacy against CRC. We first described the total synthesis of compounds 2-4 featuring Heck macrocyclization to forge their 21-membered macrocycle. In a panel of 7 cancer cell lines from different tissues, compound 4 inhibited the cell viability with IC values of 1-6 nM. In particular, compound 4 (1, 2, 4 nM) inhibited the proliferation of CRC cell lines (HCT8, HCT116 and LoVo) in both concentration and time dependent manners. Furthermore, compound 4 concentration-dependently inhibited the colony formation and migration of CRC cell lines. Moreover, compound 4 induced cell cycle arrest at sub-G1 phase, apoptosis and cellular senescence in CRC cell lines. In three patient-derived CRC organoids, compound 4 inhibited the PDO with IC values of 3.68, 28.93 and 11.81 nM, respectively. In a patient-derived xenograft mouse model, injection of compound 4 (4, 8 mg/kg, i.p.) every other day for 12 times dose-dependently inhibited the tumor growth without significant change in body weight. We conducted RNA-sequencing, molecular docking and cellular thermal shift assay to elucidate the anti-CRC mechanisms of compound 4, and revealed that it exerted its anti-CRC effect at least in part by targeting AKT1.
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Affiliation(s)
- Han Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Fei Xie
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Xiao-Ya Yuan
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Xin-Tong Dai
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Yun-Feng Tian
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Ming-Ming Sun
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Si-Qi Yu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Jia-You Cai
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Bin Sun
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China
| | - Wei-Cheng Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China.
| | - Chang-Liang Shan
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, China.
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Pramod M, Alnajjar MA, Schöpper SN, Schwarzlose T, Nau WM, Hennig A. Adamantylglycine as a high-affinity peptide label for membrane transport monitoring and regulation. Chem Commun (Camb) 2024; 60:4810-4813. [PMID: 38602391 DOI: 10.1039/d4cc00602j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The non-canonical amino acid adamantylglycine (Ada) is introduced into peptides to allow high-affinity binding to cucurbit[7]uril (CB7). Introduction of Ada into a cell-penetrating peptide (CPP) sequence had minimal influence on the membrane transport, yet enabled up- and down-regulation of the membrane transport activity.
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Affiliation(s)
- Malavika Pramod
- Center for Cellular Nanoanalytics (CellNanOs) and Department of Biology and Chemistry, Universität Osnabrück, Barbarastraße 7, Osnabrück 49069, Germany.
| | - Mohammad A Alnajjar
- Center for Cellular Nanoanalytics (CellNanOs) and Department of Biology and Chemistry, Universität Osnabrück, Barbarastraße 7, Osnabrück 49069, Germany.
| | - Sandra N Schöpper
- Center for Cellular Nanoanalytics (CellNanOs) and Department of Biology and Chemistry, Universität Osnabrück, Barbarastraße 7, Osnabrück 49069, Germany.
| | - Thomas Schwarzlose
- School of Science, Constructor University, Campus Ring 1, Bremen 28759, Germany.
| | - Werner M Nau
- School of Science, Constructor University, Campus Ring 1, Bremen 28759, Germany.
| | - Andreas Hennig
- Center for Cellular Nanoanalytics (CellNanOs) and Department of Biology and Chemistry, Universität Osnabrück, Barbarastraße 7, Osnabrück 49069, Germany.
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Xu W, Feng Z, Jiang A, Dai P, Pang X, Zhao Q, Cui M, Song B, He Y. Supermolecular Confined Silicon Phosphorescence Nanoprobes for Time-Resolved Hypoxic Imaging Analysis. Anal Chem 2024; 96:6467-6475. [PMID: 38602368 DOI: 10.1021/acs.analchem.4c00835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Room temperature phosphorescence (RTP) nanoprobes play crucial roles in hypoxia imaging due to their high signal-to-background ratio (SBR) in the time domain. However, synthesizing RTP probes in aqueous media with a small size and high quantum yield remains challenging for intracellular hypoxic imaging up to present. Herein, aqueous RTP nanoprobes consisting of naphthalene anhydride derivatives, cucurbit[7]uril (CB[7]), and organosilicon are reported via supermolecular confined methods. Benefiting from the noncovalent confinement of CB[7] and hydrolysis reactions of organosilicon, such small-sized RTP nanoprobes (5-10 nm) exhibit inherent tunable phosphorescence (from 400 to 680 nm) with microsecond second lifetimes (up to ∼158.7 μs) and high quantum yield (up to ∼30%). The as-prepared RTP nanoprobes illustrate excellent intracellular hypoxia responsibility in a broad range from ∼0.1 to 21% oxygen concentrations. Compared to traditional fluorescence mode, the SBR value (∼108.69) of microsecond-range time-resolved in vitro imaging is up to 2.26 times greater in severe hypoxia (<0.1% O2), offering opportunities for precision imaging analysis in a hypoxic environment.
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Affiliation(s)
- Wenxin Xu
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano and Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou 215123, China
| | - Zhixia Feng
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano and Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou 215123, China
| | - Airui Jiang
- The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Peiling Dai
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Xueke Pang
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano and Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou 215123, China
| | - Qiang Zhao
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Mingyue Cui
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano and Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou 215123, China
| | - Bin Song
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano and Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou 215123, China
| | - Yao He
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano and Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou 215123, China
- Macao Translational Medicine Center, Macau University of Science and Technology, Taipa 999078, Macau SAR, China
- Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa 999078, Macau SAR, China
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Seipp K, Grölz V, Glass H, Quraishi E, Vierengel N, Opatz T. Total Synthesis of (±)-Oxacyclododecindione. J Org Chem 2024; 89:5746-5763. [PMID: 38597924 DOI: 10.1021/acs.joc.4c00333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Racemic total synthesis of the natural product oxacyclododecindione, isolated in 2008 as the first member of the oxacyclododecindione family, is reported. Studies toward this molecule commenced with a biomimetic late-stage C-H oxidation starting from 14-deoxyoxacyclododecindione as a known precursor. This provided insights into the reactivity of the macrolactone class but did not permit the synthesis of the target natural product. Based on these results, a synthetic strategy through intramolecular Friedel-Crafts acylation combined with Barton decarboxylation to introduce the tertiary alcohol, a major challenge in previous synthetic efforts, was envisioned. This resulted in an 11-step racemic total synthesis of (±)-oxacyclododecindione, renowned for its potent anti-inflammatory and antifibrotic activities.
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Affiliation(s)
- Kevin Seipp
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Vincent Grölz
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Hagen Glass
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Elisabeth Quraishi
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Nina Vierengel
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
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Gao Y, Tian X, Xiong X, Wang Y, Huang W, Shi X, Jia YG, Cui ZK. Polymerizable rotaxane of cucurbituril protecting dopamine based adhesive hydrogels. Int J Biol Macromol 2024; 265:130680. [PMID: 38462121 DOI: 10.1016/j.ijbiomac.2024.130680] [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: 09/18/2023] [Revised: 02/24/2024] [Accepted: 02/28/2024] [Indexed: 03/12/2024]
Abstract
The catechol moiety found within mussel proteins plays a pivotal role in enhancing their adhesive properties. Nonetheless, catechol compounds, such as dopamine (DOP) derivatives, are susceptible to oxidation, leading to the formation of quinone. This oxidation process poses a significant challenge in the development of DOP-based hydrogels, hampering their adhesion capabilities and hindering polymerization. To protect DOP moieties from oxidation, DOP and N-(3-aminopropyl)methacrylamide (AMA) moieties were grafted onto the side groups of biocompatible poly(glutamic acid) (PGA). Subsequently, the DOP unit, serving as a second guest, would be captured by a polymerizable rotaxane of cucurbituril (CB[n]), in which the host molecule CB[8] complexed with the first guest, polymerizable methyl viologen (MV), forming a protective function and dynamic cross-linking. Upon exposure to light curing, a composite network emerged through the synergy of covalent cross-linking and supramolecular host-guest complexation of DOP with CB[8]. The generated complexation between DOP and CB[8] could protect the DOP moieties, resulting in photocured hydrogels with exceptional adhesive strength and remarkable tensile capabilities. Moreover, 3D printing technology was used to create various models with these DOP-based hydrogels, demonstrating their promising applications in future.
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Affiliation(s)
- Yunpeng Gao
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Xin Tian
- Department of Otorhinolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Xueru Xiong
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Yushi Wang
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Wen Huang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Xuetao Shi
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Yong-Guang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China.
| | - Zhong-Kai Cui
- Department of Spine Surgery, Ganzhou Hospital-Nanfang Hospital, Southern Medical University, Ganzhou, 341000, China; Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China.
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6
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Sidaway P. Repotrectinib effective in ROS1-fusion-positive NSCLC. Nat Rev Clin Oncol 2024; 21:167. [PMID: 38278875 DOI: 10.1038/s41571-024-00864-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
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7
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Repotrectinib (Augtyro) for non-small cell lung cancer. Med Lett Drugs Ther 2024; 66:e36-7. [PMID: 38412271 DOI: 10.58347/tml.2024.1696g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
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Abstract
Repotrectinib (AUGTYRO™) is a next-generation, oral, small-molecule kinase inhibitor of proto-oncogene tyrosine-protein kinase ROS1 (ROS1) and tropomyosin receptor tyrosine kinases (TRKs) TRKA, TRKB, and TRKC. It is being developed by Turning Point Therapeutics, a wholly owned subsidiary of Bristol-Myers Squibb (BMS), for the treatment of locally advanced or metastatic solid tumours, including non-small cell lung cancer (NSCLC). Repotrectinib is a next-generation tyrosine kinase inhibitor rationally designed to inhibit ROS1 and TRK fusion, including in the presence of resistance mutations such as solvent-front mutations. In November 2023, repotrectinib received its first approval in the USA for the treatment of adults with locally advanced or metastatic ROS1-positive NSCLC. Repotrectinib is under regulatory review in China and the EU for NSCLC. Clinical studies of repotrectinib are ongoing in several countries in patients with NSCLC and other solid tumours (including primary central nervous system cancer) across both adult and paediatric patient populations. In addition, preclinical investigation of repotrectinib in multiple myeloma is underway in the USA. This article summarizes the milestones in the development of repotrectinib leading to this first approval for the treatment of locally advanced or metastatic ROS1-positive NSCLC.
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Affiliation(s)
- Sohita Dhillon
- Springer Nature, Private Bag 65901, Mairangi Bay, Auckland, 0754, New Zealand.
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Pattanayakanahalli Henjarappa K, Das S, Mahanta N. A new class of macrocyclic peptides. Nat Chem Biol 2024; 20:136-139. [PMID: 38191943 DOI: 10.1038/s41589-023-01507-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Affiliation(s)
| | - Simita Das
- Department of Chemistry, Indian Institute of Technology Dharwad, Dharwad, Karnataka, India
| | - Nilkamal Mahanta
- Department of Chemistry, Indian Institute of Technology Dharwad, Dharwad, Karnataka, India.
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Yun KM, Narezkina A, Redfern C, Velasco K, Bazhenova L. Repotrectinib in a Patient With NTRK Fusion-Positive Pancreatic Carcinoma and Congenital Long QT Syndrome. JCO Precis Oncol 2024; 8:e2300265. [PMID: 38271657 PMCID: PMC10830087 DOI: 10.1200/po.23.00265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 11/02/2023] [Accepted: 11/04/2023] [Indexed: 01/27/2024] Open
Abstract
Repotrectinib in a patient with NTRK fusion-positive pancreatic carcinoma and congenital long QT syndrome.
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Affiliation(s)
- Karen M. Yun
- Division of Hematology-Oncology, Moores Cancer Center at UC San Diego Health, La Jolla, CA
| | - Anna Narezkina
- Division of Cardiology, University of California Medical Center and Sulpizio Cardiovascular Center, La Jolla, CA
| | | | - Katherine Velasco
- Division of Hematology-Oncology, Moores Cancer Center at UC San Diego Health, La Jolla, CA
| | - Lyudmila Bazhenova
- Division of Hematology-Oncology, Moores Cancer Center at UC San Diego Health, La Jolla, CA
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Massaro M, Cinà G, Borrego-Sánchez A, Sainz-Díaz CI, Viseras-Iborra C, Sánchez-Espejo R, de Melo Barbosa R, Leone F, Pibiri I, Noto R, Riela S. Thixotropic Hydrogels Based on Laponite® and Cucurbituril for Delivery of Lipophilic Drug Molecules. Chempluschem 2024; 89:e202300592. [PMID: 37902382 DOI: 10.1002/cplu.202300592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
Invited for this month's cover are the collaborating groups of Prof. Serena Riela at University of Catania, Prof. César Viseras at University of Granada and Dr. Ignacio Sainz-Diaz at Instituto Andaluz de Ciencias de la Tierra. The cover picture shows the possible application of the developed system. In particular, flufenamic acid, anti-inflammatory and anti-pyretic drug, was complexed into cucurbituril cavity and the supramolecular system obtained was used as filler for laponite® hydrogel for its topical delivery. More information can be found in the Research Article by Viseras-Iborra, Riela, and co-workers.
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Affiliation(s)
- Marina Massaro
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), University of Palermo, V.le delle Scienze, Ed. 17 "Stanislao Cannizzaro", 90128, Palermo, Italy
| | - Giuseppe Cinà
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), University of Palermo, V.le delle Scienze, Ed. 17 "Stanislao Cannizzaro", 90128, Palermo, Italy
| | - Ana Borrego-Sánchez
- Instituto de Ciencia Molecular, Universitat de València, Carrer del Catedrátic José Beltrán Martinez 2, 46980, Paterna, Spain
| | - C Ignacio Sainz-Díaz
- Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas- Universidad de Granada (CSIC-UGR), Av. de las Palmeras, 4, 18100-Armilla, Granada, Spain
| | - César Viseras-Iborra
- Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas- Universidad de Granada (CSIC-UGR), Av. de las Palmeras, 4, 18100-Armilla, Granada, Spain
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, s/n, 18071, Granada, Spain
| | - Rita Sánchez-Espejo
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, s/n, 18071, Granada, Spain
| | - Raquel de Melo Barbosa
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, s/n, 18071, Granada, Spain
| | - Federica Leone
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), University of Palermo, V.le delle Scienze, Ed. 17 "Stanislao Cannizzaro", 90128, Palermo, Italy
| | - Ivana Pibiri
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), University of Palermo, V.le delle Scienze, Ed. 17 "Stanislao Cannizzaro", 90128, Palermo, Italy
| | - Renato Noto
- University of Palermo, V.le delle Scienze, Ed. 17 "Stanislao Cannizzaro", 90128, Palermo, Italy
| | - Serena Riela
- Dipartimento di Scienze Chimiche, University of Catania, Via A. Doria, 6, 95125, Catania, Italy
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Davis F, Higson SPJ. Synthetic Receptors for Early Detection and Treatment of Cancer. Biosensors (Basel) 2023; 13:953. [PMID: 37998127 PMCID: PMC10669836 DOI: 10.3390/bios13110953] [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] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/10/2023] [Accepted: 10/22/2023] [Indexed: 11/25/2023]
Abstract
Over recent decades, synthetic macrocyclic compounds have attracted interest from the scientific community due to their ability to selectively and reversibly form complexes with a huge variety of guest moieties. These molecules have been studied within a wide range of sensing and other fields. Within this review, we will give an overview of the most common synthetic macrocyclic compounds including cyclodextrins, calixarenes, calixresorcinarenes, pillarenes and cucurbiturils. These species all display the ability to form a wide range of complexes. This makes these compounds suitable in the field of cancer detection since they can bind to either cancer cell surfaces or indeed to marker compounds for a wide variety of cancers. The formation of such complexes allows sensitive and selective detection and quantification of such guests. Many of these compounds also show potential for the detection and encapsulation of environmental carcinogens. Furthermore, many anti-cancer drugs, although effective in in vitro tests, are not suitable for use directly for cancer treatment due to low solubility, inherent instability in in vivo environments or an inability to be adsorbed by or transported to the required sites for treatment. The reversible encapsulation of these species in a macrocyclic compound can greatly improve their solubility, stability and transport to required sites where they can be released for maximum therapeutic effect. Within this review, we intend to present the use of these species both in cancer sensing and treatment. The various macrocyclic compound families will be described, along with brief descriptions of their synthesis and properties, with an outline of their use in cancer detection and usage as therapeutic agents. Their use in the sensing of environmental carcinogens as well as their potential utilisation in the clean-up of some of these species will also be discussed.
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Affiliation(s)
| | - Séamus P. J. Higson
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, UK;
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Kommidi SSR, Smith BD. Supramolecular Complexation of Azobenzene Dyes by Cucurbit[7]uril. J Org Chem 2023; 88:8431-8440. [PMID: 37256736 PMCID: PMC10843849 DOI: 10.1021/acs.joc.3c00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This report describes cucurbit[7]uril (CB7) complexation of azobenzene dyes that have a 4-(N,N'-dimethylamino) or 4-amino substituent. Absorption and NMR data show that CB7 encapsulates the protonated form of the azobenzene and that the complexed dye exists as its azonium tautomer with a trans azo conformation and substantial quinoid resonance character. Because CB7 complexation stabilizes the dye conjugate acid, there is an upward shift in its pKa, and in one specific case, the pKa of the protonated azobenzene is increased from 3.09 to 4.47. Molecular modeling indicates that the CB7/azobenzene complex is stabilized by three major noncovalent factors: (i) ion-dipole interactions between the partially cationic 4-(N,N'-dimethylamino) or 4-amino group on the encapsulated protonated azobenzene and the electronegative carbonyl oxygens on CB7, (ii) inclusion of the upper aryl ring of the azobenzene within the hydrophobic CB7 cavity, and (iii) a hydrogen bond between the proton on the azo nitrogen and CB7 carbonyls. CB7 complexation enhances azobenzene stability and increases azobenzene hydrophilicity; thus, it is a promising way to improve azobenzene performance as a pigment or prodrug. In addition, the striking yellow/pink color change that accompanies CB7 complexation can be exploited to create azobenzene dye displacement assays with naked eye detection.
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Affiliation(s)
- Sai Shradha Reddy Kommidi
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Bradley D. Smith
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA
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Zhang H, Zhang S, Zhang J, Qi H, Wang H, Zhang L, Huang J, Wang J. Acyltransferase Domain Swapping for the Production of Tenvermectin B Metabolites in Genetically Engineered Strain Streptomyces avermitilis HU02. J Agric Food Chem 2022; 70:11994-12003. [PMID: 36121904 DOI: 10.1021/acs.jafc.2c04482] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Tenvermectins A and B (TVMs A and B) are hybrid natural compounds of avermectins and milbemycins with enhanced insecticidal activity. Aiming at obtaining a strain for the production of the higher activity metabolite-TVM-B as a major constituent, a recombinant strain Streptomyces avermitilis HU02 was constructed by a domain swapping strategy in which milA1-AT0 gene in S. avermitilis MHJ1011 was replaced by eryA1-AT0 gene from Saccharopolyspora erythraea ATCC 40137. Chemical investigation on the culture of S. avermitilis HU02 led to the isolation of a large amount of TVM-B and trace amounts of five new TVM-B analogues. The structures of new metabolites were elucidated by extensive spectroscopic analysis including 1D and 2D nuclear magnetic resonance and high-resolution electrospray ionization mass spectrometry data. The bioassay test indicated that five new TVM-B analogues exhibited potent insecticidal activity against Tetranychus cinnabarinus and Bursaphelenchus xylophilus. This study provided a feasible route to the low-cost production of TVM-B and enriched the structural diversity of TVM-B metabolites.
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Affiliation(s)
- Hui Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
- Institute of Natural Active Substances Research and Utilization, School of Agriculture and Bioengineering, Taizhou Vocational College of Science and Technology, Taizhou 318020, China
- Life Science and Biotechnology Research Center, School of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Shaoyong Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
| | - Ji Zhang
- Life Science and Biotechnology Research Center, School of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Huan Qi
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
| | - Han Wang
- Life Science and Biotechnology Research Center, School of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Liqin Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
| | - Jun Huang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
- Zhejiang Makohs Biotech Co., Ltd, Taizhou 318000, P.R. China
| | - Jidong Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
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15
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Wu S, Edwards H, Wang D, Liu S, Qiao X, Carter J, Wang Y, Taub JW, Wang G, Ge Y. Inhibition of Mcl-1 Synergistically Enhances the Antileukemic Activity of Gilteritinib and MRX-2843 in Preclinical Models of FLT3-Mutated Acute Myeloid Leukemia. Cells 2022; 11:2752. [PMID: 36078163 PMCID: PMC9455003 DOI: 10.3390/cells11172752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/25/2022] [Accepted: 09/01/2022] [Indexed: 11/17/2022] Open
Abstract
FMS-like tyrosine kinase 3 (FLT3)-internal tandem duplication (FLT3-ITD) mutations occur in about 25% of all acute myeloid leukemia (AML) patients and confer a poor prognosis. FLT3 inhibitors have been developed to treat patients with FLT3-mutated AML and have shown promise, though the acquisition of resistance occurs, highlighting the need for combination therapies to prolong the response to FLT3 inhibitors. In this study, we investigated the selective Mcl-1 inhibitor AZD5991 in combination with the FLT3 inhibitors gilteritinib and MRX-2843. The combinations synergistically induce apoptosis in AML cell lines and primary patient samples. The FLT3 inhibitors downregulate c-Myc transcripts through the suppression of the MEK/ERK and JAK2/STAT5 pathways, resulting in the decrease in c-Myc protein. This suppression of c-Myc plays an important role in the antileukemic activity of AZD5991. Interestingly, the suppression of c-Myc enhances AZD5991-inudced cytochrome c release and the subsequent induction of apoptosis. AZD5991 enhances the antileukemic activity of the FLT3 inhibitors gilteritinib and MRX-2843 against FLT3-mutated AML in vitro, warranting further development.
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Affiliation(s)
- Shuangshuang Wu
- Department of Pediatric Hematology, The First Hospital of Jilin University, Changchun 130021, China
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun 130012, China
| | - Holly Edwards
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI 48202, USA
- Molecular Therapeutics Program, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Deying Wang
- The Tumor Center of the First Hospital of Jilin University, Changchun 130021, China
| | - Shuang Liu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun 130012, China
| | - Xinan Qiao
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun 130012, China
| | - Jenna Carter
- Cancer Biology Graduate Program, Wayne State University School of Medicine, Detroit, MI 48201, USA
- MD/PhD Program, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Yue Wang
- Department of Pediatric Hematology, The First Hospital of Jilin University, Changchun 130021, China
| | - Jeffrey W. Taub
- Department of Pediatrics, Wayne State University School of Medicine, Detroit, MI 48202, USA
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Children’s Hospital of Michigan, Detroit, MI 48201, USA
- Department of Pediatrics, Central Michigan University College of Medicine, Mt. Pleasant, MI 48859, USA
| | - Guan Wang
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun 130012, China
| | - Yubin Ge
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI 48202, USA
- Molecular Therapeutics Program, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Cancer Biology Graduate Program, Wayne State University School of Medicine, Detroit, MI 48201, USA
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16
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Kommidi SSR, Smith BD. Cucurbit[7]uril Complexation of Near-Infrared Fluorescent Azobenzene-Cyanine Conjugates. Molecules 2022; 27:molecules27175440. [PMID: 36080213 PMCID: PMC9457616 DOI: 10.3390/molecules27175440] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 08/18/2022] [Accepted: 08/20/2022] [Indexed: 01/21/2023]
Abstract
Two new azobenzene heptamethine cyanine conjugates exist as dispersed monomeric molecules in methanol solution and exhibit near-infrared (NIR) cyanine absorption and fluorescence. Both conjugates form non-emissive cyanine H-aggregates in water, but the addition of cucurbit[7]uril (CB7) induces dye deaggregation and a large increase in cyanine NIR fluorescence emission intensity. CB7 encapsulates the protonated azonium tautomer of the 4-(N,N-dimethylamino)azobenzene component of each azobenzene-cyanine conjugate and produces a distinctive new absorption band at 534 nm. The complex is quite hydrophilic, which suggests that CB7 can be used as a supramolecular additive to solubilize this new family of NIR azobenzene-cyanine conjugates for future biomedical applications. Since many azobenzene compounds are themselves potential drug candidates or theranostic agents, it should be possible to formulate many of them as CB7 inclusion complexes with improved solubility, stability, and pharmaceutical profile.
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17
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Guo J, Han X, Wang S, Liu M, Liu L, Wang P. A cucurbit[6]uril based supramolecular assembly for the detection and removal of dyes and antibiotics from water. Anal Methods 2022; 14:2642-2648. [PMID: 35748312 DOI: 10.1039/d2ay00658h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A cucurbit[6]uril (CB[6]) based supramolecular assembly CB[6]-[NDS]2- (1, NDS = 2,6-naphthalenedisulfonic acid anion) was used to detect dyes such as reactive blue 19 (RB19), rhodamine B (RB), methyl orange (MO), methyl red (MR), and methyl violet (MV), and isoquinoline antibiotics such as berberine (BER) and palmatine (PAL) with detection limits of 143, 128, 374, 193, 305, 27 and 34 ppb, respectively. Simultaneously, 1 also displayed high adsorption abilities towards these organic molecules. These results indicate that 1 is a favorable material for the simultaneous selective detection and removal of specific dyes and antibiotics from water, being potentially useful in monitoring water quality and treating wastewater. The possible mechanisms of the detection and adsorption are also proposed.
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Affiliation(s)
- Jing Guo
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, PR China
| | - Xiaodong Han
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, PR China
| | - Shuo Wang
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, PR China
| | - Mei Liu
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, PR China
| | - Lihui Liu
- Institute of Chemical and Industrial Bioengineering, Jilin Engineering Normal University, Changchun 130052, PR China.
| | - Peng Wang
- Department of Applied Chemistry, Yuncheng University, Yuncheng 044000, PR China
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18
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Lisowski J. Imine- and Amine-Type Macrocycles Derived from Chiral Diamines and Aromatic Dialdehydes. Molecules 2022; 27:molecules27134097. [PMID: 35807342 PMCID: PMC9267964 DOI: 10.3390/molecules27134097] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 02/04/2023] Open
Abstract
The condensation of aromatic dialdehydes with chiral diamines, such as 1,2-trans-diaminocyclohexane, leads to various enantiopure or meso-type macrocyclic Schiff bases, including [2 + 2], [3 + 3], [4 + 4], [6 + 6] and [8 + 8] condensation products. Unlike most cases of macrocycle synthesis, the [3 + 3] macrocycles of this type are sometimes obtained in high yields by direct condensation without a metal template. Macrocycles of other sizes from this family can often be selectively obtained in high yields by a suitable choice of metal template, solvent, or chirality of the building blocks. In particular, the application of a cadmium(II) template results in the expansion of the [2 + 2] macrocycles into giant [6 + 6] and [8 + 8] macrocycles. These imine macrocycles can be reduced to the corresponding macrocyclic amines which can act as hosts for the binding of multiple cations or multiple anions.
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Affiliation(s)
- Jerzy Lisowski
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
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19
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Ji QT, Hu DK, Mu XF, Tian XX, Zhou L, Yao S, Wang XH, Xiang SZ, Ye HJ, Fan LJ, Wang PY. Cucurbit[7]uril-Mediated Supramolecular Bactericidal Nanoparticles: Their Assembly Process, Controlled Release, and Safe Treatment of Intractable Plant Bacterial Diseases. Nano Lett 2022; 22:4839-4847. [PMID: 35667033 DOI: 10.1021/acs.nanolett.2c01203] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A safe, biocompatible, and stimuli-responsive cucurbit[7]uril-mediated supramolecular bactericidal nanoparticle was fabricated by encapsulating a highly bioactive carbazole-decorated imidazolium salt (A1, EC50 = 0.647 μg/mL against phytopathogen Xanthomonas oryzae pv oryzae) into the host cucurbit[7]uril (CB[7]), thereby leading to self-assembled topographies from microsheets (A1) to nanospheroidal architectures (A1@CB[7]). The assembly behaviors were elucidated by acquired single-crystal structures, 1H NMR, ITC, and X-ray powder diffraction experiments. Complex A1@CB[7] displayed lower phytotoxicity and could efficiently switch on its potent antibacterial ability via introducing a simple competitor 1-adamantanamine hydrochloride (AD). In vivo antibacterial trials against rice bacterial blight revealed that A1@CB[7] could relieve the disease symptoms after being triggered by AD and provide a workable control efficiency of 42.6% at 100 μg/mL, which was superior to bismerthiazol (33.4%). These materials can provide a viable platform for fabricating diverse stimuli-responsive supramolecular bactericides for managing bacterial infections with improved safety.
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Affiliation(s)
- Qing-Tian Ji
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - De-Kun Hu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xian-Fu Mu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xiao-Xue Tian
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Li Zhou
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Si Yao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xiao-Hui Wang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Shu-Zhen Xiang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Hao-Jie Ye
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Li-Jun Fan
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Pei-Yi Wang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
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20
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Wang C, Liu YH, Liu Y. Near-Infrared Phosphorescent Switch of Diarylethene Phenylpyridinium Derivative and Cucurbit[8]uril for Cell Imaging. Small 2022; 18:e2201821. [PMID: 35460176 DOI: 10.1002/smll.202201821] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/10/2022] [Indexed: 06/14/2023]
Abstract
Near-infrared (NIR) pure organic room-temperature phosphorescence (RTP) materials have received growing research interest due to their wide application in the fields of high-resolution bioimaging and luminescent materials. In this work, the authors report a macrocycle-confined pure organic RTP supramolecular assembly, which is constructed by diarylethene phenylpyridinium derivative (DTE-TP) and cucurbit[8]uril (CB[8]). Compared with CB[6] and CB[7], the larger cavity of CB[8] induces molecular folding and enhances the intramolecular charge transfer interactions, which leads to the obtained assembly emitting efficient NIR phosphorescence at 700 nm. Due to the photochromism of the diarylethene core, the NIR phosphorescence is reversibly regulated by light irradiation at wavelengths of 365 and >600 nm. Furthermore, cell-based experiments show that this supramolecular assembly is located in the lysosomes and displays a NIR phosphorescence at 650-750 nm. In addition, by means of phosphorescence resonance energy transfer, the obtained assembly exhibits a red-shifted NIR emission at 817 nm. This supramolecular phosphorescent switch provides a convenient path for the modular design of water-soluble pure organic room-temperature NIR phosphorescent materials.
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Affiliation(s)
- Conghui Wang
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Yao-Hua Liu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Yu Liu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
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21
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Solis-Egaña F, Lavín-Urqueta N, Guerra Díaz D, Mariño-Ocampo N, Faúndez MA, Fuentealba D. Supramolecular co-encapsulation of a photosensitizer and chemotherapeutic drug in cucurbit[8]uril for potential chemophototherapy. Photochem Photobiol Sci 2022; 21:349-359. [PMID: 35088367 DOI: 10.1007/s43630-022-00174-7] [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: 11/16/2021] [Accepted: 01/14/2022] [Indexed: 11/25/2022]
Abstract
Supramolecular strategies as well as combinatorial approaches have been proposed to improve cancer therapeutics. In this work, we investigated the encapsulation of the photosensitizer acridine orange (AO) and the chemotherapeutic drug oxaliplatin (OxPt) in cucurbit[8]uril (CB[8]), and tested their effect both separate and combined on tumoral cells cultivated in vitro. Binding constants and enthalpies of reaction for the AO@CB[8], (AO)2@CB[8] and OxPt@CB[8] complexes were determined by isothermal titration calorimetry. In the case of AO, a negative cooperativity for the binding of the second AO molecule was found, in agreement with previous fluorescence titration data. We show herein that the AO@CB[8] complex was effectively incorporated within the cells and showed important phototoxicity, while the OxPt@CB[8] complex was cytotoxic only at long incubation times (24 h). Pre-treatment of the cells with the OxPt@CB[8] complex for 24 h inhibited any photodynamic action by the later treatment with the AO@CB[8] complex. However, when both complexes were co-incubated for 90 min, the combined cytotoxicity/phototoxicity was superior to any of the treatments individually. A cooperative effect was identified that added up to an extra 30% cytotoxicity/phototoxicity. The results point to an interesting system where a photosensitizer and chemotherapeutic drug are co-encapsulated in a macrocycle to develop chemophototherapy applications.
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Affiliation(s)
- Fresia Solis-Egaña
- Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Nicole Lavín-Urqueta
- Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Daniel Guerra Díaz
- Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Nory Mariño-Ocampo
- Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Mario A Faúndez
- Escuela de Farmacia, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Denis Fuentealba
- Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile.
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22
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Ioannou E, Labrou NE. Rational Design of Self-Assembling Supramolecular Protein Nanostructures Utilizing the Cucurbit[8]Uril Macrocyclic Host. Methods Mol Biol 2022; 2487:177-187. [PMID: 35687236 DOI: 10.1007/978-1-0716-2269-8_11] [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] [Indexed: 06/15/2023]
Abstract
Self-assembly is a phenomenon that governs molecular structural organization in nature, therefore raising research interest for the fabrication of novel nanomaterials with diverse applications in biocatalysis, biomedicine, material templating, and biosensor development. In this chapter we provide protocols for the development of supramolecular protein complexes based on host-guest interactions in the presence of the macrocyclic host, cucurbit[8]uril (CB[8]). CB[8] is reported to exhibit high binding affinity towards the tripeptide Phe-Gly-Gly (FGG), therefore it can be utilized as a selective adhesive of protein molecules, after fusion of FGG to an accessible protein surface.
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Affiliation(s)
- Elisavet Ioannou
- Laboratory of Enzyme Technology, Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, Athens, Greece
| | - Nikolaos E Labrou
- Laboratory of Enzyme Technology, Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, Athens, Greece.
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23
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Abstract
Fusions involving TRK protein tyrosine kinases are oncogenic drivers in a variety of tumors in children and adults, with a prevalence of ∼0.2% in non-small cell lung cancer. Diagnosis can be challenging due to structural features such as NTRK intron length, but next-generation sequencing (NGS), including RNA-based NGS, increases detection. The first-generation TRK inhibitors, larotrectinib and entrectinib, have demonstrated clinically meaningful antitumor activity in TRK fusion-positive cancers in a tumor-agnostic fashion and should be considered first-line therapeutic options for TRK fusion-positive lung cancers. Furthermore, the first-generation TRK inhibitors are well tolerated. Care should be taken, however, to monitor on-target adverse events, such as dizziness, weight gain, paresthesias, and withdrawal pain. On-target and off-target mechanisms mediating TRK inhibitor resistance may occur. Next-generation TRK inhibitors, such as selitrectinib, repotrectinib, and taletrectinib, are available on ongoing clinical trials and address on-target resistance. This review will focus on NTRK fusions and TRK-directed targeted therapy specifically in the context of lung cancer.
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Affiliation(s)
- Guilherme Harada
- Department of Medicine, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
| | - Fernando C Santini
- Department of Medicine, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
| | - Clare Wilhelm
- Department of Medicine, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
| | - Alexander Drilon
- Department of Medicine, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; Department of Medicine, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA.
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24
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Liu G, Xu X, Dai X, Jiang C, Zhou Y, Lu L, Liu Y. Cucurbituril-activated photoreaction of dithienylethene for controllable targeted lysosomal imaging and anti-counterfeiting. Mater Horiz 2021; 8:2494-2502. [PMID: 34870307 DOI: 10.1039/d1mh00811k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Supramolecular macrocycle-mediated photoreaction has been a research hotspot recently. Herein, we fabricated a photo-responsive intelligent supramolecular assembly that consisted of a water-soluble dithienylethene derivative (DTE-MPBT) and cucurbit[n]urils (CB[n]). Importantly, CB[n], especially CB[8], could act as activators and trigger conformational alteration of the arm parts (typical molecular rotors) of DTE-MPBT, achieving dual functions, i.e. high-efficiency visible-light-cyclization reaction of the DTE core and fluorescence enhancement of DTE-MPBT, resulting in the formation of a dual visible light-driven fluorescent switch. These unexpected discoveries prompted the supramolecular assembly to be applied to dual-visible-light-controlled targeted lysosomal imaging and QR code information recognition. Moreover, the solid-state assembly exhibited more outstanding fluorescence and visible-light-switched fluorescence performance because of the host-guest-induced aggregation synergistic effect, showing fascinating applications, such as light-manipulative data storage and anti-counterfeiting. In brief, we unprecedentedly adopted a supramolecular strategy of "killing two birds with one stone", i.e. assembly-activated photochromism (AAP) and assembly-activated emission enhancement (AAEE), to fabricate dual-visible-light-driven fluorescent switches, which show promising application prospects in biomimetic smart nanomaterials based on supramolecular self-assembly systems.
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Affiliation(s)
- Guoxing Liu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
- College of Science, Henan Agricultural University, Zhengzhou, Henan 450002, P. R. China
| | - Xiufang Xu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Xianyin Dai
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Chunhui Jiang
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Yu Zhou
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Lei Lu
- College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
| | - Yu Liu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
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Zhu L, Zhang S, Lu F, Zhang K, Han Q, Ying Q, Zhang X, Zhang C, Zhou S, Chen A. Cross-resistance, fitness costs, and biochemical mechanism of laboratory-selected resistance to tenvermectin A in Plutella xylostella. Pest Manag Sci 2021; 77:2826-2835. [PMID: 33538385 DOI: 10.1002/ps.6317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/28/2021] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Tenvermectin A is a new avermectin derivative that has good insecticidal and acaricidal effects. In order to study the resistance of Plutella xylostella to tenvermectin A, a sensitive strain (SS) and a laboratory-selected tenvermectin A-resistant strain (RS, 33.57-fold) were used to evaluate cross-resistance and fitness costs as well as to determine the resistance mechanism. RESULTS There was no cross-resistance with common pesticides except for moderate cross-resistance with cypermethrin (resistance ratio = 10.26-fold) observed in RS. The activities of metabolic enzymes were measured, and the results showed that mixed function oxidase (MFO) and carboxylate esterase (CarE) in RS increased significantly by 2.92- and 2.86-fold, respectively, compared with SS. In addition, there was no obvious difference in glutathione-S-transferase (GST), which indicated that enhanced MFO and CarE activities may be the main mechanisms of detoxification. In the four typical resistance-related genes, expression of GluCl (4.86-fold), ABCC2 (3.85-fold), and CYP6 (2.94-fold) in RS were significantly promoted, but expression of GST was not. The clone and sequence of the PxGluClα subunit displayed six mutations that could lead to changes in the amino acid residues. CONCLUSION High suitability related to tenvermectin A resistance was observed in RS, and it was found that the developmental stages of RS were significantly shortened and the survival rate of females was reduced. In addition, the mechanism of resistance to tenvermectin A may be regulated by the glutamate-gated chloride channel, ATP-binding cassette transporter, and MFO. In general, the study of resistance and biochemical mechanisms can provide beneficial and rational information for the management of resistance in P. xylostella. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Linying Zhu
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Shaoyong Zhang
- College of Life Science, Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, Huzhou University, Huzhou, China
| | - Feng Lu
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Kui Zhang
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Qunqi Han
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Qianwen Ying
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Xinwei Zhang
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Cuilan Zhang
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Shaa Zhou
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Anliang Chen
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
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Owen WJ, Meyer KG, Slanec TJ, Meyer ST, Wang NX, Fitzpatrick GM, Niyaz NN, Nugent J, Ricks MJ, Rogers RB, Yao C. Synthesis and biological activity of analogs of the antifungal antibiotic UK-2A. III. Impact of modifications to the macrocycle isobutyryl ester position. Pest Manag Sci 2020; 76:277-286. [PMID: 31207132 DOI: 10.1002/ps.5511] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/22/2019] [Accepted: 06/07/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Fenpicoxamid (Inatreq™ active), a new fungicide under development by Corteva Agriscience™, Agriculture Division of DowDuPont, is an isobutyryl acetal derivative of the antifungal antibiotic UK-2A. SAR studies around the picolinamide ring and benzyl substituents attached at positions 3 and 8, respectively, of the UK-2A bislactone macrocycle have recently been documented. This study focuses on replacement of the isobutyryl ester group in the 7 position. RESULTS Thirty analogs, predominantly esters and ethers, were prepared and evaluated for inhibition of mitochondrial electron transport and in vitro growth of Zymoseptoria tritici, Leptosphaeria nodorum, Pyricularia oryzae and Ustilago maydis. Aliphatic substituents containing four to six carbon atoms deliver strong intrinsic activity, the pivaloate ester (IC50 1.44 nM) and the n-butyl, 1-Me-propyl, 3,3-diMe-propyl and 2-c-propyl propyl ethers (IC50 values = 1.08, 1.14, 1.15 & 1.32 nM, respectively) being the most active derivatives. QSAR modelling identified solvation energy (Esolv ) and critical packing parameters (vsurf_CP) as highly significant molecular descriptors for explaining relative intrinsic activity of analogs. Activity translation to fungal growth inhibition and disease control testing was significantly influenced by intrinsic activity and physical properties, the cyclopropanecarboxylate ester (log D 3.67, IC50 3.36 nM, Z. tritici EC50 12 μg L-1 ) showing the strongest Z. tritici activity in protectant tests. CONCLUSIONS Substitution of the isobutyryl ester group of UK-2A generates analogs that retain strong antifungal activity against Z. tritici and other fungi. © 2019 Society of Chemical Industry.
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Affiliation(s)
- W John Owen
- Crop Protection Discovery Biology, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Kevin G Meyer
- Crop Protection Discovery Chemistry, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Thomas J Slanec
- Crop Protection Discovery Biology, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Stacy T Meyer
- Crop Protection Discovery Biology, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Nick X Wang
- Crop Protection Discovery Chemistry, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Gina M Fitzpatrick
- Crop Protection Discovery Chemistry, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Noormohamed N Niyaz
- Crop Protection Discovery Chemistry, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Jaime Nugent
- Crop Protection Discovery Chemistry, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Michael J Ricks
- Crop Protection Discovery Chemistry, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Richard B Rogers
- Crop Protection Discovery Chemistry, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
| | - Chenglin Yao
- Crop Protection Discovery Biology, Corteva Agriscience™, Agriculture Division of DowDuPont, Indianapolis, IN, USA
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Zheng Y, Zhang J, Wei L, Shi M, Wang J, Huang J. Gunnilactams A-C, Macrocyclic Tetralactams from the Mycelial Culture of the Entomogenous Fungus Paecilomyces gunnii. J Nat Prod 2017; 80:1935-1938. [PMID: 28562046 DOI: 10.1021/acs.jnatprod.7b00060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Three novel macrocyclic tetralactams, gunnilactam A (1), gunnilactam B (2), and gunnilactam C (3), were isolated from the submerged fermentation broth of Paecilomyces gunnii, an entomogenous fungus identified as the anamorph of Cordyceps gunnii. Their structures were determined using NMR data, HREIMS, and single-crystal X-ray crystallography. Gunnilactam A exhibited selective cytotoxic activity against human prostate cancer C42B cells with an IC50 value of 5.4 μM.
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Affiliation(s)
- Yongbiao Zheng
- Engineering Research Center of Industrial Microbiology, College of Life Sciences, Fujian Normal University , Fuzhou 350117, People's Republic of China
| | - Jiyan Zhang
- Engineering Research Center of Industrial Microbiology, College of Life Sciences, Fujian Normal University , Fuzhou 350117, People's Republic of China
| | - Liufeng Wei
- Engineering Research Center of Industrial Microbiology, College of Life Sciences, Fujian Normal University , Fuzhou 350117, People's Republic of China
| | - Mianmian Shi
- Engineering Research Center of Industrial Microbiology, College of Life Sciences, Fujian Normal University , Fuzhou 350117, People's Republic of China
| | - Jifeng Wang
- Fudan Institute of Urology, the Fifth People's Hospital of Shanghai, Fudan University , Shanghai 200240, People's Republic of China
| | - Jianzhong Huang
- Engineering Research Center of Industrial Microbiology, College of Life Sciences, Fujian Normal University , Fuzhou 350117, People's Republic of China
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Lv C, Feng L, Zhao H, Wang G, Stavropoulos P, Ai L. Chiral discrimination of α-hydroxy acids and N-Ts-α-amino acids induced by tetraaza macrocyclic chiral solvating agents by using 1H NMR spectroscopy. Org Biomol Chem 2017; 15:1642-1650. [PMID: 28127599 PMCID: PMC5363180 DOI: 10.1039/c6ob02578a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the field of chiral recognition, reported chiral discrimination by 1H NMR spectroscopy has mainly focused on various chiral analytes with a single chiral center, regarded as standard chiral substrates to evaluate the chiral discriminating abilities of a chiral auxiliary. Among them, chiral α-hydroxy acids, α-amino acids and their derivatives are chiral organic molecules involved in a wide variety of biological processes, and also play an important role in the area of preparation of pharmaceuticals, as they are part of the synthetic process in the production of chiral drug intermediates and protein-based drugs. In this paper, several α-hydroxy acids and N-Ts-α-amino acids were used to evaluate the chiral discriminating abilities of tetraaza macrocyclic chiral solvating agents (TAMCSAs) 1a-1d by 1H NMR spectroscopy. The results indicate that α-hydroxy acids and N-Ts-α-amino acids were successfully discriminated in the presence of TAMCSAs 1a-1d by 1H NMR spectroscopy in most cases. The enantiomers of the α-hydroxy acids and N-Ts-α-amino acids were assigned based on the change of integration of the 1H NMR signals of the corresponding protons. The enantiomeric excesses (ee) of N-Ts-α-amino acids 11 with different optical compositions were calculated based on the integration of the 1H NMR signals of the CH3 protons (Ts group) of the enantiomers of (R)- and (S)-11 in the presence of TAMCSA 1b. At the same time, the possible chiral discriminating behaviors have been discussed by means of the Job plots of (±)-2 with TAMCSAs 1b and proposed theoretical models of the enantiomers of 2 and 6 with TAMCSA 1a, respectively.
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Affiliation(s)
- Caixia Lv
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China.
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29
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Swiger SL, Payne RD. Selected Insecticide Delivery Devices for Management of Horn Flies (Haematobia irritans) (Diptera: Muscidae) on Beef Cattle. J Med Entomol 2017; 54:173-177. [PMID: 28082645 DOI: 10.1093/jme/tjw144] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 08/07/2016] [Indexed: 06/06/2023]
Abstract
The horn fly, Haematobia irritans (L.) (Diptera: Muscidae), is one of the most important pests of the beef cattle industry. Horn fly adults are blood feeders that remain in constant contact with cattle, providing management opportunities via insecticide-impregnated ear tags. Controlling horn flies in the United States is time consuming and costly, but failure to implement management can lead to weight loss and decreased weight gain of calves and yearlings. In the past decade, new chemical combinations have been impregnated into ear tags for pest management. The objectives of this project were to 1) evaluate the efficacy of ear tags against horn fly populations and 2) determine if reduced fly density results in economic return. During 2013, data were compiled by insecticide class; treated cows averaged fly reductions of 198 (s = 38.91; n = 3) for macrocyclic lactone treatments, 175 (s = 62.74; n = 4) for pyrethroid treatments, and 174 (s = 35.28; n = 8) for organophosphate treatments compared with untreated animals (214; s = 50.38; n = 9). During 2014, mean fly reductions were 187 (s = 14.15; n = 4) for macrocyclic lactone, 147 (s = 61.41; n = 13) for pyrethroid, and 143 (s = 77.16; n = 8) for organophosphate treatments relative to the untreated (200; s = 99.83; n = 14). A novel technology, the VetGun application system, tested in 2014, resulted in fly reductions (121 ±, n = 4), but means were not statistically significant from the control (200; s = 99.83; n = 14). Treatment of cattle with ear tags significantly reduced horn fly numbers compared with untreated cattle.
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Affiliation(s)
- Sonja Lise Swiger
- Department of Entomology, Texas A&M AgriLife Research and Extension Center, 1229 North US 281, Stephenville, TX 76401
| | - Richard D Payne
- Department of Statistics, Texas A&M University, College Station, TX 77843
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Yazaki I, Abe M, Santella L, Koyama Y. Mechanisms of Calcium Elevation in the Micromeres of Sea Urchin Embryos. Biol Cell 2012; 96:153-67. [PMID: 15050370 DOI: 10.1016/j.biolcel.2003.11.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2003] [Accepted: 11/18/2003] [Indexed: 10/26/2022]
Abstract
The micromeres, the first cells to be specified in sea urchin embryos, are generated by unequal cleavage at the fourth cell division. The micromeres differentiate autonomously to form spicules and dispatch signals to induce endomesoderm in the neighbouring macromeres cells in the embryo. Using a calcium indicator Fura-2/AM and a mixture of dextran conjugated Oregon green-BAPTA 488 and Rhodamine red, the intracellular calcium ion concentration ([Ca2+]i) was studied in embryos at the 16-cell stage. [Ca2+]i was characteristically elevated in the micromeres during furrowing at the 4th cleavage. Subsequently, Ca2+ oscillated for about 10 min in the micromeres, resulting in episodic high levels of [Ca2+]i. High [Ca2+]i regions were associated with regional localizations of the endoplasmic reticulum (ER), though not with ER accumulated at the vegetal pole of the micromeres during the 4th division. Pharmacological studies, using a blocker of IP3-mediated Ca2+ release (Xestospongin), a store-operated Ca2+ entry inhibitor (2 aminoethoxydiphenyl borate (2-APB)) and an inhibitor of stretch-dependent ion channels (gadolinium), suggest that the high [Ca2+]i and oscillations in the micromeres are triggered by calcium influx caused by the activation of stretch-dependent calcium channels, followed by the release of calcium ions from the endoplasmic reticulum. On the basis of these new findings, a possible mechanism for autonomous formation of the micromeres is discussed.
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Affiliation(s)
- Ikuko Yazaki
- Department of Biology, Tokyo Metropolitan University, Minamiohsawa 1-1, Hachiohji, Tokyo 192-0397, Japan.
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Smith FL, LeBlanc SJ, Carter R. Influence of intracellular Ca2+ release modulating drugs on bupivacaine infiltration anesthesia in mice. Eur J Pain 2012; 8:153-61. [PMID: 14987625 DOI: 10.1016/s1090-3801(03)00089-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2003] [Accepted: 07/04/2003] [Indexed: 10/27/2022]
Abstract
The endoplasmic reticulum inside neurons can provide enormous amounts of releasable Ca2+ to increase cytosolic Ca2+ levels through the activation of endoplasmic membrane ion channels. Ryanodine (RyR) channels release Ca2+ into the cytosol when activated by Ca2+ influx through voltage-gated channels, or by cyclicADP ribose. Inositol tris-phosphate (IP3) channels are stimulated by phospolipid metabolism and the release of IP3. The hypothesis was tested that drugs that bind RyR or IP3 channels would affect the anesthetic potency of bupivacaine. The radiant heat tail-flick test was used to assess for anesthesia following subcutaneous infiltration of bupivacaine and Ca2+ modulating drugs in the tails of mice. No musculature is contained in the tail that could result in motor block. The RyR channel agonists 4-chloro-m-cresol and poly-L-lysine significantly reduced the anesthetic potency of bupivacaine. The plant alkaloid ryanodine elicited a bi-phasic effect, with low concentrations blocking bupivacaine anesthesia, and a high concentration enhancing anesthesia. Alternatively, the RyR channel antagonist dantrolene sodium dose-dependently increased bupivacaine's potency. However, the IP3 channel drugs were inactive. The IP3 agonist adenophostin A failed to affect bupivacaine anesthesia. Furthermore, bupivacaine was unaffected by the IP3 channel antagonists xestospongin C or low molecular weight heparin. Our results indicate that only the RyR channel drugs modulated the anesthetic effects of bupivacaine. Electrophysiological and molecular studies of sensory dorsal root ganglia neurons, the source of Adelta and C-fiber nociceptors, have demonstrated the presence of RyR3 Ca2+ release channels. This provides the first evidence that RyR channels might affect bupivacaine anesthesia in some fashion.
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Affiliation(s)
- Forrest L Smith
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus of Virginia Commonwealth University, P.O. Box 980613, Richmond, VA 23298-0613, USA.
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González-Béjar M, Montes-Navajas P, García H, Scaiano JC. Methylene blue encapsulation in cucurbit[7]uril: laser flash photolysis and near-IR luminescence studies of the interaction with oxygen. Langmuir 2009; 25:10490-4. [PMID: 19735127 DOI: 10.1021/la9011923] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The effect of methylene blue (MB) encapsulation in cucurbit[7]uril (CB[7]) on triplet excited-state behavior and singlet oxygen (1O2) generation has been studied by using laser flash photolysis (LFP) and time-resolved near-IR luminescence spectroscopy. The lifetime of the triplet excited state of MB is longer in the CB[7] cavity (140 micros for MB-CB[7] vs 79.5 micros for aqueous MB). Cucurbituril also protects the dye triplets from quenching by oxygen, reducing the quenching rate constant [kq(O2)] from 2.6x10(9) M(-1) s(-1) to 0.2x10(9) M(-1) s(-1). The quantum yield of 1O2 production in the air-equilibrated D2O solutions is similar for free MB and for MB-CB[7], and the singlet oxygen lifetime is approximately 70 micros, suggesting its decay occurs in the aqueous (D2O) phase. The generation of singlet oxygen is delayed by CB[7]; this is attributed to the time required for oxygen to access the CB[7] nanocavity and react with the MB triplet. Thus, the rate-limiting step for sensitization is the entry of oxygen into the CB[7] cavity. Encapsulation inside CB[7] increases the relative efficiency of photoinduced MB2+* dication-radical generation, for which a modest yield is observed.
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Affiliation(s)
- María González-Béjar
- Department of Chemistry, Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario, Canada, K1N 6N5
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Miura T, Natsume S, Kanemoto K, Atsumi K, Fushimi H, Sasai H, Arai T, Yoshida T, Ajito K. Novel azalides derived from sixteen-membered macrolides. J Antibiot (Tokyo) 2007; 60:407-35. [PMID: 17721001 DOI: 10.1038/ja.2007.55] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The design and synthesis of novel 15-membered 11-azalides and 16-membered 11,12-diazalide starting from 16-membered macrolides are reported. A mobile linear dialdehyde was isolated via a cyclic tetraol which was prepared by osmium oxidation of a conjugated diene. One-pot macrocyclization of this dialdehyde with an amine or a diamine afforded corresponding 15-membered azalides or 11,12-diazalide. Fundamental SAR studies of 15-membered 11-azalides disclosed their potentiality as a lead molecule for further chemical modifications. For environmental preservation, sustainable chemistry for synthesis of these azalides is also discussed.
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Affiliation(s)
- Tomoaki Miura
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., Yokohama, Japan
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Ryzhkina IS, Habicher WD, Kiseleva YUV, Timosheva AP, Konovalov AI, Valitova YN, Mardanova GN, Tsentsevitskii AN, Gordon LK. Aggregation and physiological effect on plant cells of amphiphilic calix[4]resorcinarenes with hydroxymethylmethylamide and carboxymethyl groups. DOKL BIOCHEM BIOPHYS 2007; 413:68-71. [PMID: 17546956 DOI: 10.1134/s1607672907020081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- I S Ryzhkina
- Arbuzov Institute of Organic and Physical Chemistry, Kazan Research Center, Russian Academy of Sciences, ul. Akademika Arbuzova 8, Kazan, 420088 Tatarstan, Russia
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Abstract
This article surveys chemical transformations of selected bile acids. Chemical transformations were initially carried out with the aim of determining the structure of bile acids. More recently they have been concerned with bile acid interconversions as well as with the synthesis of steroid hormones, vitamins and therapeutc agents. Studies of similarities and differences in the biosynthesis of bile acids from cholesterol have occupied many researches. However, this article reviews only papers dealing with the synthesis of potential intermediates in the biosynthesis of bile acids. Steroid hormones such as pregnenolone, progesterone and testosterone are synthesized from methyl thiodeoxycholate whereas cortisone is synthesized from methyl deoxycholiate. Numerous papers and patents devoted to the synthesis of ursodeoxycholic acid from cholic or chenodeoxycholic acid testify to its effectiveness in the treatment of cholelithiasis. Chenodeoxycholic acid appears to be an excellent precursor in the synthesis of steroid plant growth regulators, as well as in the synthesis of metabolites and vitamin D analogues. Chirality of bile acids has been exploited in the synthesis of cyclic and acyclic receptors and solvents. Cholic and deoxycholic acids have been used to create new macrocyclic structures which show different capacities to bind and transport other compounds. Another important trend in the chemistry of bile acids is their application in combinatorial chemistry.
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Affiliation(s)
- K Kuhajda
- Faculty of Science, Department of Biochemistry, University of Novi Sad, Serbia
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Affiliation(s)
- Hüseyin Bakirci
- School of Engineering and Science, International University Bremen, Campus Ring 1, 28759 Bremen, Germany
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London FS, Marcinkiewicz M, Walsh PN. PAR-1-stimulated factor IXa binding to a small platelet subpopulation requires a pronounced and sustained increase of cytoplasmic calcium. Biochemistry 2006; 45:7289-98. [PMID: 16752917 PMCID: PMC2533735 DOI: 10.1021/bi060294m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We previously reported that only a subpopulation of PAR-1-stimulated platelets binds coagulation factor IXa, since confirmed by other laboratories. Since calcium changes have been implicated in exposure of procoagulant aminophospholipids, we have now examined calcium fluxes in this subpopulation by measuring fluorescence changes in Fura Red/AM-loaded platelets following PAR-1 stimulation. While fluorescence changes in all platelets indicated calcium release from internal stores and influx of external calcium, a subpopulation of platelets displayed a pronounced increase in calcium transients by 15 s and positive factor IXa binding by 2 min, with calcium transients sustained for 45 min. Pretreatment of platelets with Xestospongin C to inhibit IP3-mediated dense tubule calcium release, and the presence of impermeable calcium channel blockers nifedipine, SKF96365, or LaCl3, inhibited PAR-1-induced development of a subpopulation with pronounced calcium transients, factor IXa binding, and platelet support of FXa generation, suggesting the importance of both release of calcium from internal stores and influx of extracellular calcium. When platelets were stimulated in EDTA for 5-20 min before addition of calcium, factor IXa binding sites developed on a smaller subpopulation but with unchanged rate, indicating sustained opening of calcium channels and continued availability of signaling elements required for binding site exposure. While pretreatment of platelets with 100 microM BAPTA/AM (Kd 160 nM) had minimal effects, 100 microM 5,5'-dimethylBAPTA/AM (Kd 40 nM) completely inhibited the appearance and function of the platelet subpopulation, indicating the importance of minor increases of cytoplasmic calcium. We conclude that PAR-1-stimulated development of factor IXa binding sites in a subpopulation of platelets is dependent upon release of calcium from internal stores leading to sustained and pronounced calcium transients.
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Affiliation(s)
- Fredda S London
- Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA.
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Singh AK, Saxena P, Mehtab S, Panwar A. Cobalt(II)-selective membrane sensor based on a [Me2(13)dieneN4] macrocyclic cobalt complex. Anal Bioanal Chem 2006; 385:1342-6. [PMID: 16794813 DOI: 10.1007/s00216-006-0544-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2006] [Revised: 05/08/2006] [Accepted: 05/11/2006] [Indexed: 11/29/2022]
Abstract
A new poly(vinyl chloride)-based membrane was fabricated with the cobalt(II) complex of 2,4-dimethyl-1,5,8,11-tetraazacyclotrideca-1,4-diene [Me2(13)dieneN4] as an ion carrier. The membrane composition was Co2+ complex/PVC/NaTPB/DBP 15:50:15:20 (w/w). The sensor exhibited a Nernstian response for Co2+ ions over a wide concentration range (7.94x10(-6)-1.0x10(-1) M) at pH 2.5-7.0, a response time of 10 s, and it could be used for 3 months without any significant divergence in potential. The proposed membrane sensor exhibited good selectivity for Co2+ over a wide variety of other metal ions and in mixtures containing up to 25% (v/v) non-aqueous content. The sensor was successfully used as an indicator electrode in the potentiometric titration of Co2+ with EDTA and the direct determination of Co2+ in real samples.
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Affiliation(s)
- Ashok Kumar Singh
- Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247 667, India.
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Koida S, Ohyanagi M, Ueda A, Mori Y, Iwasaka T. Mechanism of increased alpha-adrenoceptor-mediated contraction in small resistance arteries of rats with heart failure. Clin Exp Pharmacol Physiol 2006; 33:47-52. [PMID: 16445698 DOI: 10.1111/j.1440-1681.2006.04322.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
1. Alterations in a(1)-adrenoceptor signalling that result in enhanced contraction in resistance arteries in heart failure are not well characterized. To clarify whether this enhanced constriction is due to Ca(2+)-dependent or -independent effects, we measured the phenylephrine-induced changes in [Ca(2+)](i) in the presence of a Rho kinase inhibitor or an inositol 1,4,5-trisphosphate (IP(3)) receptor inhibitor. 2. Heart failure was induced in rats by ligation of the left coronary artery. Changes in the internal diameter of pressurized small femoral arteries were examined using videomicroscopy. Phenylephrine concentration-response curves, constructed in the presence of the Rho kinase inhibitor Y27632 (0.3 micromol/L) or the IP(3) receptor inhibitor xestospongin C (0.3 micromol/L), were compared in heart failure rats and sham-operated (control) rats; fura-2 Ca(2+) signals were measured in the arteries of both groups. 3. The heart : bodyweight ratio, lung : bodyweight ratio, left ventricular end-diastolic pressure and plasma B-type natriuretic peptide were significantly higher in heart failure rats compared with control rats. Phenylephrine-induced contractile responses and increases in [Ca(2+)](i) were significantly greater in arteries from heart failure rats compared with arteries from control rats. At 0.3 micromol/L, Y27632 selectively inhibited phenylephrine-induced constrictions of heart failure arteries, but had no effect on the increase in [Ca(2+)](i). 4. Immunohistochemical staining for Rho kinase was greater in heart failure rats compared with control rats. 5. The degree of inhibition of both the phenylephrine-induced constriction and the increase in [Ca(2+)](i) by xestospongin C (0.3 micromol/L) was greater in arteries from heart failure rats than in those from control rats. 6. The increased contractile response to phenylephrine in arteries of heart failure rats results from IP(3)-dependent increases in [Ca(2+)](i) and from an enhanced Ca(2+) sensitivity via a Rho kinase-dependent mechanism.
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Affiliation(s)
- Satsuki Koida
- Department of Internal Medicine, Division of Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya 663-8501, Japan
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41
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Abstract
Natriuretic peptides (NPs) may work as neuromodulators through their associated receptors [NP receptors (NPRs)]. By immunocytochemistry, we showed that NPR-A and NPR-B were expressed abundantly on both ON-type and OFF-type bipolar cells (BCs) in rat retina, including the dendrites, somata, and axon terminals. Whole-cell recordings made from isolated ON-type BCs further showed that brain natriuretic peptide (BNP) suppressed GABAA receptor-, but not GABAC receptor-, mediated currents of the BCs, which was blocked by the NPR-A antagonist anantin. The NPR-C agonist c-ANF [des(Gln18, Ser19, Gln20, Leu21, Gly22)ANF(4-23)-NH2] did not suppress GABAA currents. The BNP effect on GABAA currents was abolished with preincubation with the pGC-A/B antagonist HS-142-1 but mimicked by application of 8-bromoguanosine-3',5'-cyclomonophosphate. These results suggest that elevated levels of intracellular cGMP caused by activation of NPR-A may mediate the BNP effect. Internal infusion of the cGMP-dependent protein kinase G (PKG) inhibitor KT5823 essentially blocked the BNP-induced reduction of GABAA currents. Moreover, calcium imaging showed that BNP caused a significant elevation of intracellular calcium that could be caused by increased calcium release from intracellular stores by PKG. The BNP effect was blocked by the ryanodine receptor modulators caffeine, ryanodine, and ruthenium red but not by the IP3 receptor antagonists heparin and xestospongin-C. Furthermore, the BNP effect was abolished after application of the blocker of endoplasmic reticulum Ca2+-ATPase thapsigargin and greatly reduced by the calmodulin inhibitors W-7 and calmidazolium. We therefore conclude that the increased calcium release from ryanodine-sensitive calcium stores by BNP may be responsible for the BNP-caused GABAA response suppression in ON-type BCs through stimulating calmodulin.
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MESH Headings
- Animals
- Atrial Natriuretic Factor/pharmacology
- Caffeine/pharmacology
- Calcium/metabolism
- Calcium Channels
- Calcium Signaling/drug effects
- Calcium-Transporting ATPases/antagonists & inhibitors
- Calmodulin/antagonists & inhibitors
- Calmodulin/physiology
- Carbazoles/pharmacology
- Cyclic GMP/analogs & derivatives
- Cyclic GMP/pharmacology
- Cyclic GMP-Dependent Protein Kinases/physiology
- GABA-A Receptor Antagonists
- Guanylate Cyclase/drug effects
- Guanylate Cyclase/physiology
- Heparin/pharmacology
- Imidazoles/pharmacology
- Indoles/pharmacology
- Inositol 1,4,5-Trisphosphate Receptors
- Macrocyclic Compounds
- Male
- Membrane Potentials/drug effects
- Natriuretic Peptide, Brain/antagonists & inhibitors
- Natriuretic Peptide, Brain/pharmacology
- Natriuretic Peptide, Brain/physiology
- Oxazoles/pharmacology
- Patch-Clamp Techniques
- Peptide Fragments/pharmacology
- Peptides, Cyclic/pharmacology
- Polysaccharides/pharmacology
- Protein Kinase Inhibitors/pharmacology
- Rats
- Rats, Sprague-Dawley
- Receptors, Atrial Natriuretic Factor/drug effects
- Receptors, Atrial Natriuretic Factor/physiology
- Receptors, Cytoplasmic and Nuclear/antagonists & inhibitors
- Receptors, GABA/physiology
- Receptors, GABA-A/drug effects
- Retinal Bipolar Cells/drug effects
- Retinal Bipolar Cells/physiology
- Ruthenium Red/pharmacology
- Ryanodine/pharmacology
- Ryanodine Receptor Calcium Release Channel/drug effects
- Thapsigargin/pharmacology
- gamma-Aminobutyric Acid/pharmacology
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Affiliation(s)
- Yong-Chun Yu
- Institute of Neurobiology, Fudan University, Shanghai 200433, China
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Chandra S, Gupta N, Gupta R. Novel copper(II) homobinuclear macrocyclic complexes: cyclic voltammetry, biological properties and spectral studies. Spectrochim Acta A Mol Biomol Spectrosc 2006; 63:587-93. [PMID: 16098799 DOI: 10.1016/j.saa.2005.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2005] [Revised: 05/26/2005] [Accepted: 06/04/2005] [Indexed: 05/04/2023]
Abstract
A series of five new copper(II) macrocyclic complexes have been synthesized by template condensation. The bonding and stereochemistry of the complexes have been characterized by elemental analysis, molar conductance, magnetic susceptibility, IR, UV-visible, EPR spectral studies and electrochemical properties. g-Values are calculated for all of the complexes in polycrystalline form as well as in DMSO solution. The magnetic and spectral data indicate square planar geometry for all the complexes. Cyclic voltammograms for all the complexes are similar and involve two quasi-reversible redox processes. Cu(II)Cu(II)<=>Cu(II)Cu(I)<=>Cu(I)Cu(I). Their biological properties have also been studied. The macrocyclic complexes show more anti-bacterial than controlled one. The anti-bacterial activities of the compounds were tested against Streptococcus fecalis and Escherichia coli with different concentrations.
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Affiliation(s)
- Sulekh Chandra
- Department of Chemistry, Zakir Husain College, University of Delhi, J.L. Nehru Marg, New Delhi 110002, India.
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Dayanithi G, Mechaly I, Viero C, Aptel H, Alphandery S, Puech S, Bancel F, Valmier J. Intracellular Ca2+ regulation in rat motoneurons during development. Cell Calcium 2006; 39:237-46. [PMID: 16324742 DOI: 10.1016/j.ceca.2005.10.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Revised: 10/20/2005] [Accepted: 10/26/2005] [Indexed: 11/18/2022]
Abstract
Changes in intracellular Ca(2+) concentration ([Ca(2+)](i)) control the setting up of the neuro-muscular synapse in vitro and probably in vivo. Dissociated cultures of purified embryonic (E15) rat motoneurons were used to explore the molecular mechanisms by which endoplasmic reticulum Ca(2+) stores, via both ryanodine-sensitive and IP(3)-sensitive intracellular Ca(2+) channels control [Ca(2+)](i) homeostasis in these neurons during ontogenesis. Fura-2 microspectrofluorimetry monitorings in single neurons showed that caffeine-induced responses of [Ca(2+)](i) increased progressively from days 1-7 in culture. These responses were blocked by ryanodine and nicardipine but not by omega-conotoxin-GVIA or omega-conotoxin-MVIIC suggesting a close functional relationship between ryanodine-sensitive and L-type Ca(v)1 Ca(2+) channels. Moreover, after 6 days in vitro, neurons exhibited spontaneous or caffeine-induced Ca(2+) oscillations that were attenuated by nicardipine. In 1-day-old neurons, both thapsigargin or CPA, which deplete Ca(2+) stores from the endoplasmic reticulum, induced an increase in [Ca(2+)](i) in 75% of the neurons tested. The number of responding motoneurons declined to 25% at 5-6 days in vitro. Xestospongin-C, a membrane-permeable IP(3) receptor inhibitor blocked the CPA-induced [Ca(2+)](i) response in all stages. RT-PCR studies investigating the expression pattern of RYR and IP(3) Ca(2+) channels isoforms confirmed the presence of their different isoforms and provided evidence for a specific pattern of development for RYR channels during the first week in vitro. Taken together, present results show that the control of motoneuronal [Ca(2+)](i) homeostasis is developmentally regulated and suggest the presence of an intracellular ryanodine-sensitive Ca(2+) channel responsible for a Ca(2+)-induced Ca(2+) release in embryonic motoneurons following voltage-dependent Ca(2+) entry via L-type Ca(2+) channels.
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Affiliation(s)
- Govindan Dayanithi
- INSERM-U 583, Institut des Neurosciences de Montpellier, Hôpital St. Eloi, BP 74103, 80 Rue Augustin FLICHE-34091, Montpellier Cedex 5, France.
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Hansen ME, Pessah IN, Matsumura F. Heptachlor epoxide induces a non-capacitative type of Ca2+ entry and immediate early gene expression in mouse hepatoma cells. Toxicology 2006; 220:218-31. [PMID: 16469423 DOI: 10.1016/j.tox.2006.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2005] [Revised: 01/02/2006] [Accepted: 01/05/2006] [Indexed: 10/25/2022]
Abstract
The effects of the organochlorine (OC) liver tumor promoter heptachlor epoxide (HE) and a related non-tumor promoting OC, delta-hexachlorocyclohexane (delta-HCH), on the dynamics of intracellular calcium (Ca2+) were investigated in mouse 1c1c7 hepatoma cells. HE induced a non-capacitative, Ca2+ entry-like phenomenon, which was transient and concentration-dependent with 10 and 50 microM HE. The plasma membrane Ca2+ channel blocker SKF-96365 antagonized this HE-induced Ca2+ entry. delta-HCH failed to induce Ca2+ entry, rather it antagonized the HE-induced Ca2+ entry. Both HE and delta-HCH induced Ca2+ release from endoplasmic reticulum (ER) at treatment concentrations as low as 10 microM; at 50 microM, the former induced 5x as much Ca2+ release as the latter. The HE-induced Ca2+ release from the ER was antagonized using the IP3 receptor/channel blocker xestospongin C, suggesting that HE induces ER Ca2+ release through the IP3 receptor/channel pore. These results show that the effect of HE on cellular Ca2+ mimics that of mitogens such as epidermal and hepatocyte growth factors. They also provide insight into the similarities and differences between tumorigenic and non-tumorigenic OCs, in terms of the mechanisms and the extent of the [Ca2+]i increased by these agents.
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Affiliation(s)
- Mark E Hansen
- Department of Environmental Toxicology, University of California, Davis, CA 95616, USA
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Amano T, Aoki S, Setsuie R, Sakurai M, Wada K, Noda M. Identification of a novel regulatory mechanism for norepinephrine transporter activity by the IP3 receptor. Eur J Pharmacol 2006; 536:62-8. [PMID: 16554048 DOI: 10.1016/j.ejphar.2006.02.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2005] [Revised: 01/27/2006] [Accepted: 02/21/2006] [Indexed: 10/25/2022]
Abstract
The norepinephrine transporter (NET) plays a crucial role in noradrenergic neurotransmission and is a target of many antidepressants and psychostimulants. Intracellular Ca2+ is reportedly involved in regulating NET activity, but the detailed mechanism is not clear. We employed a norepinephrine uptake assay using SH-SY5Y cells and found that the IP3 receptor inhibitors, 2-aminoethoxydiphenyl borate and xestospongin C, reduced the NET Vmax. These reductions were accompanied by the decreased cell surface expression of NET. Our findings suggest that intracellular Ca2+ mobilized by IP3 receptor is required for the maintenance of NET activity. This adds another pathway involving Ca2+ for the regulation of NET to other known mechanisms providing intracellular Ca2+.
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Affiliation(s)
- Taiju Amano
- Laboratory of Pathophysiology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
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Cusato K, Ripps H, Zakevicius J, Spray DC. Gap junctions remain open during cytochrome c-induced cell death: relationship of conductance to ‘bystander’ cell killing. Cell Death Differ 2006; 13:1707-14. [PMID: 16485029 DOI: 10.1038/sj.cdd.4401876] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Previous reports have shown that gap junctions relay cell death in many cell types. However, changes in electrical coupling and their dynamics during cell death are poorly understood. We performed comprehensive studies of electrical coupling following induction of cell death by single-cell cytochrome c (cyC) injection in paired Xenopus oocytes. Cell death was rapidly induced by cyC in injected cells, and cell death was also observed in uninjected bystander cells electrically coupled to the cyC-injected oocytes. Gap junction currents either remained at pre-cyC injection levels or increased dramatically as the injected cell died. Nonjunctional currents increased in injected cells immediately following cyC injection; nonjunctional currents increased slowly in uninjected bystander cells. Bystander cell death occurred only when junctional conductance was approximately 6 muS. Both 1,2-bis-(o-aminophenoxy)-ethane-N,N,-N',N'-tetraacetic acid tetraacetoxy-methyl ester and Xestospongin C inhibited bystander cell death in pairs that had reached the death conductance threshold, suggesting that Ca(2+) and inositol 1,4,5 triphosphate are involved in the process.
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Affiliation(s)
- K Cusato
- Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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Zhu G, Okada M, Yoshida S, Mori F, Hirose S, Wakabayashi K, Kaneko S. Involvement of Ca(2+)-induced Ca2+ releasing system in interleukin-1beta-associated adenosine release. Eur J Pharmacol 2006; 532:246-52. [PMID: 16487508 DOI: 10.1016/j.ejphar.2005.12.085] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2005] [Revised: 11/24/2005] [Accepted: 12/19/2005] [Indexed: 11/16/2022]
Abstract
Interleukin-1beta (IL-1beta) plays an important role in neuroprotective and neurodegenerative events in the central nervous system. To clarify the mechanism of controversial actions of IL-1beta, we determined the effect of IL-1beta, as well as the interaction between IL-1beta and Ca(2+)-induced Ca2+ releasing system (CICR), on adenosine releases in mice hippocampus using mini-slices method. Basal and K(+)-stimulated adenosine releases were regulated by two types of CICRs, including inositol-1,4,5-trisphosphate (IP3) receptor and ryanodine receptor. Lower concentration of IL-1beta increased both adenosine releases, whereas higher concentration did not affect their releases. The stimulatory effect of IL-1beta on basal adenosine release was reduced by removal of extracellular Ca2+ and IP3 receptor inhibitor, while the stimulatory effect of IL-1beta on K(+)-stimulated adenosine release was reduced by ryanodine receptor inhibitor. These results suggest that the potent effect of IL-1beta upon adenosine release might contribute to the neuroprotective action of IL-1beta, whereas IL-1beta-induced neurodegeneration might be due to the overload response of Ca2+ mobilization and the inactivation of adenosine exocytosis.
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Affiliation(s)
- Gang Zhu
- Department of Neuropsychiatry, Hirosaki University School of Medicine, Hirosaki 036-8562, Japan
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48
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Abstract
BACKGROUND Luminescent lanthanide complexes produce emissions with the narrowest-known width at half maximum; however, their significant use in cytometry required an increase in luminescence intensity. The companion review, Leif et al., Cytometry 2006;69A:767-778, described a new technique for the enhancement of lanthanide luminescence, the Resonance Energy Transfer Enhanced Luminescence (RETEL) effect, which increases luminescence and is compatible with standard slide microscopy. METHODS The luminescence of the europium ion macrocyclic complex, EuMac, was increased by employing the RETEL effect. After adding the nonluminescent gadolinium ion complex of the thenoyltrifluoroacetonate (TTFA) ligand or the sodium salt of TTFA in ethanol solution, the EuMac-labeled sample was allowed to dry. Both a conventional arc lamp and a time-gated UV LED served as light sources for microscopic imaging. The emission intensity was measured with a CCD camera. Multiple time-gated images were summed with special software to permit analysis and effective presentation of the final image. RESULTS With the RETEL effect, the luminescence of the EuMac-streptavidin conjugate increased at least six-fold upon drying. Nuclei of apoptotic cells were stained with DAPI and tailed with 5BrdUrd to which a EuMac-anti-5BrdU conjugate was subsequently attached. Time-gated images showed the long-lived EuMac luminescence but did not show the short-lived DAPI fluorescence. Imaging of DNA-synthesizing cells with an arc lamp showed that both S phase and apoptotic cells were labeled, and that their labeling patterns were different. The images of the luminescent EuMac and fluorescent DAPI were combined to produce a color image on a white background. This combination of simple chemistry, instrumentation, and presentation should make possible the inexpensive use of the lanthanide macrocycles, Quantum Dyes, as molecular diagnostics for cytological and histopathological microscopic imaging.
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Hattori T, Ara T, Wang P. Participation of tyrosine kinase and phospholipase Cgamma in isradipine-induced proliferation of cultured human gingival fibroblasts. Eur J Med Res 2005; 10:543-6. [PMID: 16356872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023] Open
Abstract
Some kinds of drugs such as calcium (Ca(2+)) channel antagonists, antiepileptics and immunosuppressants cause gingival overgrowth as a side effect, the mechanism of which is still unclear. We have examined the effects of isradipine, one of the dihydropyridine-derivative Ca(2+) channel antagonists, on cultured human gingival fibroblast Gin-1 cells. In the present study, to elucidate the mechanism by which isradipine causes gingival overgrowth, we examined whether tyrosine kinase (TK) and phopholipase Cgamma (PLCgamma) are involved in the isradipine-induced proliferation of gingival fibroblasts. Herbimycin A (1 microM) remarkably inhibited the isradipime (10 microM)-induced proliferation. Both U73122 (5 microM), a PLCgamma inhibitor, and xestospongin C (5 microM), an antagonist of a receptor of inositol 1,4,5-trisphosphate in Ca(2+) stores, significantly reduced the [Ca(2+)]i raised by isradipine (10 microM). Thus, the findings obtained here indicate that TK and PLCgamma are closely involved in the isradipine-induced [Ca(2+)]i rise to elicit gingival overgrowth.
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Affiliation(s)
- Toshimi Hattori
- Department of Dental Pharmacology, Matsumoto Dental University, Shiojiri, Japan.
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Okada M, Yoshida S, Zhu G, Hirose S, Kaneko S. Biphasic actions of topiramate on monoamine exocytosis associated with both soluble N-ethylmaleimide-sensitive factor attachment protein receptors and Ca(2+)-induced Ca(2+)-releasing systems. Neuroscience 2005; 134:233-46. [PMID: 15961239 DOI: 10.1016/j.neuroscience.2005.03.045] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2005] [Revised: 03/26/2005] [Accepted: 03/30/2005] [Indexed: 11/25/2022]
Abstract
To explore the pharmacological mechanisms of topiramate (TPM), we determined the effects of TPM on monoamine (dopamine and serotonin) exocytosis associated with N-ethylmaleimide-sensitive factor attachment protein receptors and Ca(2+)-induced Ca(2+)-releasing systems, including inositol-triphosphate receptor and ryanodine receptor in freely moving rat pre-frontal cortex using in vivo microdialysis. During resting stage, Ca(2+) output from endoplasmic reticulum Ca(2+) store via inositol-triphosphate receptor regulates syntaxin-associated monoamine exocytosis mechanism, whereas during neuronal hyperexcitable stage, Ca(2+) output via ryanodine receptor regulates synaptobrevin-associated monoamine exocytosis mechanism. Basal monoamine releases were increased and decreased by therapeutically relevant and supratherapeutic concentration of TPM, respectively. The therapeutic-relevant concentration of TPM increased Ca(2+)-evoked release concentration-dependently; however, its stimulatory effect was attenuated in the supratherapeutic range. The K(+)-evoked releases were reduced by TPM concentration-dependently (from therapeutic to supratherapeutic ranges). The therapeutic-relevant concentration of TPM-induced elevation of basal release was reduced by cleavage with syntaxin and inhibition of inositol-triphosphate receptor predominantly, by cleavage with SNAP-25 and synaptobrevin weakly, but not by ryanodine receptor inhibitor. The therapeutic-relevant concentration of TPM-induced elevation of Ca(2+)-evoked release was reduced by cleavage with syntaxin and inositol-triphosphate receptor inhibitor selectively. The therapeutic-relevant concentration of TPM-induced reduction of K(+)-evoked monoamine release was abolished by cleavage with synaptobrevin, but was not affected by cleavage with SNAP-25 or synaptobrevin. The stimulatory effect of ryanodine receptor agonist on K(+)-evoked monoamine release was reduced by TPM, whereas that of inositol-triphosphate receptor agonist was not affected by TPM. Therefore, these results indicate that the combination of the effects of TPM on exocytosis mechanisms associated with SNARE and Ca(2+)-induced Ca(2+)-releasing systems, enhancement of inositol-triphosphate receptor/syntaxin and inhibition of ryanodine receptor/synaptobrevin in pre-frontal cortex, may be involved in clinical actions of TPM.
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Affiliation(s)
- M Okada
- Department of Neuropsychiatry, School of Medicine, Hirosaki University, Hirosaki 036-8562, Japan.
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