1
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Pohorilets I, Beard JP, Driscoll JL, Schmitz JC, Koide K. Synthesis and antiproliferative activity of a tetrahydrofuran analog of FR901464. Bioorg Med Chem Lett 2024; 104:129739. [PMID: 38599298 DOI: 10.1016/j.bmcl.2024.129739] [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: 01/24/2024] [Revised: 04/03/2024] [Accepted: 04/06/2024] [Indexed: 04/12/2024]
Abstract
FR901464 is a natural product that exhibits antiproliferative activity at single-digit nanomolar concentrations in cancer cells. Its tetrahydropyran-spiroepoxide covalently binds the spliceosome. Through our medicinal chemistry campaign, we serendipitously discovered that a bromoetherification formed a tetrahydrofuran. The tetrahydrofuran analog was three orders of magnitude less potent than the corresponding tetrahydropyran analogs. This study shows the significance of the tetrahydropyran ring that presents the epoxide toward the spliceosome.
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Affiliation(s)
- Ivanna Pohorilets
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, PA 15260, United States
| | - Jacob P Beard
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, PA 15260, United States
| | - Julia L Driscoll
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, PA 15260, United States
| | - John C Schmitz
- Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine 5150 Centre Avenue, Pittsburgh, PA 15232, United States; Cancer Therapeutics Program, UPMC Hillman Cancer Center 5117 Centre Ave, Pittsburgh, PA 15232, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, PA 15260, United States; Cancer Therapeutics Program, UPMC Hillman Cancer Center 5117 Centre Ave, Pittsburgh, PA 15232, United States.
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2
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Beard J, Bressin RK, Markaj PL, Schmitz JC, Koide K. Synthesis and Conformational Analysis of FR901464-Based RNA Splicing Modulators and Their Synergism in Drug-Resistant Cancers. J Med Chem 2023; 66:14497-14512. [PMID: 37870431 PMCID: PMC10641826 DOI: 10.1021/acs.jmedchem.3c00733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Indexed: 10/24/2023]
Abstract
FR901464 is a cytotoxic natural product that binds splicing factor 3B subunit 1 (SF3B1) and PHD finger protein 5A (PHF5A), the components of the human spliceosome. The amide-containing tetrahydropyran ring binds SF3B1, and it remains unclear how the substituents on the ring contribute to the binding. Here, we synthesized meayamycin D, an analogue of FR901464, and three additional analogues to probe the conformation through methyl scanning. We discovered that the amide-containing tetrahydropyran ring assumes only one of the two possible chair conformations and that methylation of the nitrogen distorts the chair form, dramatically reducing cytotoxicity. Meayamycin D induced alternative splicing of MCL-1, showed strong synergism with venetoclax in drug-resistant lung cancer cells, and was cancer-specific over normal cells. Meayamycin D incorporates an alkyl ether and shows a long half-life in mouse plasma. The characteristics of meayamycin D may provide an approach to designing other bioactive L-shaped molecules.
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Affiliation(s)
- Jacob
P. Beard
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Robert K. Bressin
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Paulo L. Markaj
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - John C. Schmitz
- Division
of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, 5150 Centre Avenue, Pittsburgh, Pennsylvania 15232, United States
- Cancer
Therapeutics Program, UPMC Hillman Cancer
Center, 5117 Centre Avenue, Pittsburgh, Pennsylvania 15232, United States
| | - Kazunori Koide
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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3
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Fogel M, Koide K. Recent Progress on One-Pot Multisubstrate Screening. Org Process Res Dev 2023; 27:1235-1247. [PMID: 37529075 PMCID: PMC10389808 DOI: 10.1021/acs.oprd.3c00128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Indexed: 08/03/2023]
Abstract
Traditionally, new synthetic reactions have been developed using a model substrate to screen reaction conditions before testing the optimized conditions with a range of more complex substrates. In 1998, Gao and Kagan pooled multiple substrates in one pot to study the generality of an enantioselective method. Although such one-pot multisubstrate screenings may be powerful, few applications have appeared in the literature. With the advancement of various chromatography techniques, it may be time to revisit this underutilized platform. This review article discusses the applications of one-pot multisubstrate screenings as a method for developing new synthetic methods.
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4
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Love SL, Emerson JD, Koide K, Hoskins AA. Pre-mRNA splicing-associated diseases and therapies. RNA Biol 2023; 20:525-538. [PMID: 37528617 PMCID: PMC10399480 DOI: 10.1080/15476286.2023.2239601] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023] Open
Abstract
Precursor mRNA (pre-mRNA) splicing is an essential step in human gene expression and is carried out by a large macromolecular machine called the spliceosome. Given the spliceosome's role in shaping the cellular transcriptome, it is not surprising that mutations in the splicing machinery can result in a range of human diseases and disorders (spliceosomopathies). This review serves as an introduction into the main features of the pre-mRNA splicing machinery in humans and how changes in the function of its components can lead to diseases ranging from blindness to cancers. Recently, several drugs have been developed that interact directly with this machinery to change splicing outcomes at either the single gene or transcriptome-scale. We discuss the mechanism of action of several drugs that perturb splicing in unique ways. Finally, we speculate on what the future may hold in the emerging area of spliceosomopathies and spliceosome-targeted treatments.
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Affiliation(s)
- Sierra L Love
- Genetics Training Program, University of Wisconsin-Madison, Madison, WI, USA
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Joseph D Emerson
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Aaron A Hoskins
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA
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5
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Koide K. Mechanistic and Synthetic Studies of Biaryl Birch Reductions. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0042-1751387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
AbstractThe Birch reduction of biaryls generally converts one of the two arenes into a cyclohexa-1,4-diene. Biaryls are more reactive than monocyclic arenes under the Birch conditions. Unlike the reduction of monocyclic arenes, biaryl reduction proceeds through two consecutive electron transfer steps before the protonation of the dianion intermediate. The biaryl reductions and subsequent alkylations in one pot rapidly increase the molecular complexity and thus have been used in the synthesis of natural products and drug-like molecules.1 Introduction2 The Physical Organic Chemistry of the Birch Reduction of Biaryls3 Biaryls as the Mediators of Electron Transfer4 Methods for the Dissolving-Metal Reduction of Biaryls5 Intercepting the Biaryl Reduction Intermediates with Electrophiles6 Synthetic Applications of the Dissolving-Metal-Mediated Reductions of Biaryls7 Outlook
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6
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Beard JP, Emerson JD, Jacobs AS, O'Grady AJ, Burrows J, Koide K. Improved Synthesis of the Amine Fragment of FR901464 and Thailanstatins through the Development of a Convenient N-Detosylation Method. J Org Chem 2022; 87:13416-13421. [PMID: 36153989 DOI: 10.1021/acs.joc.2c01889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
FR901464 and thailanstatins are potent cytotoxic natural products that share an amine-containing tetrahydropyran ring. We previously reported the synthesis of the tetrahydropyran component. Here, we changed the protecting group for the amine from Boc to tosyl, improving yields and the time economy. A highlight of the revised synthetic scheme is the use of lithium, t-butanol, and ethylenediamine in THF (nontraditional Birch reduction conditions) for the N-detosylation.
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Affiliation(s)
- Jacob P Beard
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Joseph D Emerson
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Alexander S Jacobs
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Andrew J O'Grady
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - James Burrows
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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7
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Vinod JK, Koide K. Mono‐
O
‐functionalizations of Pittsburgh Green and Their Applications. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jincy K. Vinod
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue 15260 Pittsburgh Pennsylvania United States
| | - Kazunori Koide
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue 15260 Pittsburgh Pennsylvania United States
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8
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Abstract
[Figure: see text].
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Affiliation(s)
- James Burrows
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Shogo Kamo
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
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9
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Chan WC, Vinod JK, Koide K. Acetal Addition to Electron-Deficient Alkenes with Hydrogen Atom Transfer as a Radical Chain Propagation Step. J Org Chem 2021; 86:3674-3682. [DOI: 10.1021/acs.joc.0c03044] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei Chuen Chan
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Jincy K. Vinod
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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10
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Affiliation(s)
- Jessica M. Williams
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Annelise K. Wanner
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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11
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Pham D, Deter CJ, Reinard MC, Gibson GA, Kiselyov K, Yu W, Sandulache VC, St. Croix CM, Koide K. Using Ligand-Accelerated Catalysis to Repurpose Fluorogenic Reactions for Platinum or Copper. ACS Cent Sci 2020; 6:1772-1788. [PMID: 33145414 PMCID: PMC7596870 DOI: 10.1021/acscentsci.0c00676] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Indexed: 05/03/2023]
Abstract
The development of a fluorescent probe for a specific metal has required exquisite design, synthesis, and optimization of fluorogenic molecules endowed with chelating moieties with heteroatoms. These probes are generally chelation- or reactivity-based. Catalysis-based fluorescent probes have the potential to be more sensitive; however, catalytic methods with a biocompatible fluorescence turn-on switch are rare. Here, we have exploited ligand-accelerated metal catalysis to repurpose known fluorescent probes for different metals, a new approach in probe development. We used the cleavage of allylic and propargylic ethers as platforms that were previously designed for palladium. After a single experiment that combinatorially examined >800 reactions with two variables (metal and ligand) for each ether, we discovered a platinum- or copper-selective method with the ligand effect of specific phosphines. Both metal-ligand systems were previously unknown and afforded strong signals owing to catalytic turnover. The fluorometric technologies were applied to geological, pharmaceutical, serum, and live cell samples and were used to discover that platinum accumulates in lysosomes in cisplatin-resistant cells in a manner that appears to be independent of copper distribution. The use of ligand-accelerated catalysis may present a new blueprint for engineering metal selectivity in probe development.
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Affiliation(s)
- Dianne Pham
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Carly J. Deter
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Mariah C. Reinard
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Gregory A. Gibson
- Department
of Cell Biology, University of Pittsburgh, 3500 Terrace Street, Pittsburgh, Pennsylvania 15261, United States
| | - Kirill Kiselyov
- Department
of Biological Sciences, University of Pittsburgh, 4249 Fifth Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Wangjie Yu
- Bobby
R. Alford Department of Otolaryngology-Head and Neck Surgery, Baylor College of Medicine, Houston, Texas 77030, United States
| | - Vlad C. Sandulache
- Bobby
R. Alford Department of Otolaryngology-Head and Neck Surgery, Baylor College of Medicine, Houston, Texas 77030, United States
| | - Claudette M. St. Croix
- Department
of Cell Biology, University of Pittsburgh, 3500 Terrace Street, Pittsburgh, Pennsylvania 15261, United States
| | - Kazunori Koide
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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12
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Gambino A, Burnett JC, Koide K. Methyl Scanning and Revised Binding Mode of 2-Pralidoxime, an Antidote for Nerve Agent Poisoning. ACS Med Chem Lett 2020; 11:1893-1898. [PMID: 33062170 DOI: 10.1021/acsmedchemlett.9b00586] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/09/2020] [Indexed: 12/18/2022] Open
Abstract
Organophosphorus nerve agents (OPNAs) inhibit acetylcholinesterase (AChE) and, despite the Chemical Weapons Convention arms control treaty, continue to represent a threat to both military personnel and civilians. 2-Pralidoxime (2-PAM) is currently the only therapeutic countermeasure approved by the United States Food and Drug Administration for treating OPNA poisoning. However, 2-PAM is not centrally active due to its hydrophilicity and resulting poor blood-brain barrier permeability; hence, these deficiencies warrant the development of more hydrophobic analogs. Specifically, gaps exist in previously published structure activity relationship (SAR) studies for 2-PAM, thereby making it difficult to rationally design novel analogs that are concomitantly more permeable and more efficacious. In this study, we methodically performed a methyl scan on the core pyridinium of 2-PAM to identify ring positions that could tolerate both additional steric bulk and hydrophobicity. Subsequently, SAR-guided molecular docking was used to rationalize hydropathically feasible binding modes for 2-PAM and the reported derivatives. Overall, the data presented herein provide new insights that may facilitate the rational design of more efficacious 2-PAM analogs.
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Affiliation(s)
- Adriana Gambino
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - James C. Burnett
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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13
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Pham D, Basu U, Pohorilets I, St Croix CM, Watkins SC, Koide K. Fluorogenic Probe Using a Mislow–Evans Rearrangement for Real‐Time Imaging of Hydrogen Peroxide. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dianne Pham
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Upamanyu Basu
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Ivanna Pohorilets
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Claudette M. St Croix
- Center for Biologic Imaging Department of Cell Biology University of Pittsburgh 3500 Terrace Street Pittsburgh PA 15261 USA
| | - Simon C. Watkins
- Center for Biologic Imaging Department of Cell Biology University of Pittsburgh 3500 Terrace Street Pittsburgh PA 15261 USA
| | - Kazunori Koide
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
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14
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Pham D, Basu U, Pohorilets I, St Croix CM, Watkins SC, Koide K. Fluorogenic Probe Using a Mislow–Evans Rearrangement for Real‐Time Imaging of Hydrogen Peroxide. Angew Chem Int Ed Engl 2020; 59:17435-17441. [DOI: 10.1002/anie.202007104] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/19/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Dianne Pham
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Upamanyu Basu
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Ivanna Pohorilets
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Claudette M. St Croix
- Center for Biologic Imaging Department of Cell Biology University of Pittsburgh 3500 Terrace Street Pittsburgh PA 15261 USA
| | - Simon C. Watkins
- Center for Biologic Imaging Department of Cell Biology University of Pittsburgh 3500 Terrace Street Pittsburgh PA 15261 USA
| | - Kazunori Koide
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
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15
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Chaemsaithong P, Sahota D, Pooh RK, Zheng M, Ma R, Chaiyasit N, Koide K, Shaw SW, Seshadri S, Choolani M, Panchalee T, Yapan P, Sim WS, Sekizawa A, Hu Y, Shiozaki A, Saito S, Leung TY, Poon LC. First-trimester pre-eclampsia biomarker profiles in Asian population: multicenter cohort study. Ultrasound Obstet Gynecol 2020; 56:206-214. [PMID: 31671479 DOI: 10.1002/uog.21905] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [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: 08/26/2019] [Revised: 10/08/2019] [Accepted: 10/11/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVES To (i) evaluate the applicability of the European-derived biomarker multiples of the median (MoM) formulae for risk assessment of preterm pre-eclampsia (PE) in seven Asian populations, spanning the east, southeast and south regions of the continent, (ii) perform quality-assurance (QA) assessment of the biomarker measurements and (iii) establish criteria for prospective ongoing QA assessment of biomarker measurements. METHODS This was a prospective, non-intervention, multicenter study in 4023 singleton pregnancies, at 11 to 13 + 6 weeks' gestation, in 11 recruiting centers in China, Hong Kong, India, Japan, Singapore, Taiwan and Thailand. Women were screened for preterm PE between December 2016 and June 2018 and gave written informed consent to participate in the study. Maternal and pregnancy characteristics were recorded and mean arterial pressure (MAP), mean uterine artery pulsatility index (UtA-PI) and maternal serum placental growth factor (PlGF) were measured in accordance with The Fetal Medicine Foundation (FMF) standardized measurement protocols. MAP, UtA-PI and PlGF were transformed into MoMs using the published FMF formulae, derived from a largely Caucasian population in Europe, which adjust for gestational age and covariates that affect directly the biomarker levels. Variations in biomarker MoM values and their dispersion (SD) and cumulative sum tests over time were evaluated in order to identify systematic deviations in biomarker measurements from the expected distributions. RESULTS In the total screened population, the median (95% CI) MoM values of MAP, UtA-PI and PlGF were 0.961 (0.956-0.965), 1.018 (0.996-1.030) and 0.891 (0.861-0.909), respectively. Women in this largely Asian cohort had approximately 4% and 11% lower MAP and PlGF MoM levels, respectively, compared with those expected from normal median formulae, based on a largely Caucasian population, whilst UtA-PI MoM values were similar. UtA-PI and PlGF MoMs were beyond the 0.4 to 2.5 MoM range (truncation limits) in 16 (0.4%) and 256 (6.4%) pregnancies, respectively. QA assessment tools indicated that women in all centers had consistently lower MAP MoM values than expected, but were within 10% of the expected value. UtA-PI MoM values were within 10% of the expected value at all sites except one. Most PlGF MoM values were systematically 10% lower than the expected value, except for those derived from a South Asian population, which were 37% higher. CONCLUSIONS Owing to the anthropometric differences in Asian compared with Caucasian women, significant differences in biomarker MoM values for PE screening, particularly MAP and PlGF MoMs, were noted in Asian populations compared with the expected values based on European-derived formulae. If reliable and consistent patient-specific risks for preterm PE are to be reported, adjustment for additional factors or development of Asian-specific formulae for the calculation of biomarker MoMs is required. We have also demonstrated the importance and need for regular quality assessment of biomarker values. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- P Chaemsaithong
- Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR
| | - D Sahota
- Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR
| | - R K Pooh
- CRIFM Clinical Research Institute of Fetal Medicine PMC, Osaka, Japan
| | - M Zheng
- Nanjing Drum Tower Hospital, Nanjing, China
| | - R Ma
- First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - N Chaiyasit
- King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - K Koide
- Showa University Hospital, Tokyo, Japan
| | - S W Shaw
- Taipei Chang Gung Memorial Hospital, Taipei, Taiwan
| | | | | | | | - P Yapan
- Siriraj Hospital, Bangkok, Thailand
| | - W S Sim
- KK Women's and Children's Hospital, Singapore
| | | | - Y Hu
- Nanjing Drum Tower Hospital, Nanjing, China
| | - A Shiozaki
- University of Toyama University Hospital, Toyama, Japan
| | - S Saito
- University of Toyama University Hospital, Toyama, Japan
| | - T Y Leung
- Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR
| | - L C Poon
- Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR
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16
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Affiliation(s)
- Robert K. Bressin
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Sami Osman
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Ivanna Pohorilets
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Upamanyu Basu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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17
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Lukomski L, Pohorilets I, Koide K. Third-Generation Method for High-Throughput Quantification of Trace Palladium by Color or Fluorescence. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.9b00472] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lydia Lukomski
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Ivanna Pohorilets
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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18
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Pohorilets I, Tracey MP, LeClaire MJ, Moore EM, Lu G, Liu P, Koide K. Kinetics and Inverse Temperature Dependence of a Tsuji–Trost Reaction in Aqueous Buffer. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Ivanna Pohorilets
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Matthew P. Tracey
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Michael J. LeClaire
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Emily M. Moore
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Gang Lu
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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19
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Affiliation(s)
- Robert K. Bressin
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Julia L. Driscoll
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Yanping Wang
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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20
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Abstract
We report the first total synthesis of the reported structure of the heat shock protein expression inhibitor stresgenin B. The synthesis features (1) diastereoselective cyanation of an oxocarbenium intermediate en route to the synthetically challenging α-amido dioxolane, (2) Pd-catalyzed hydration of an unstable nitrile, and (3) late-stage Au-catalyzed Meyer-Schuster rearrangement or Ce-mediated Peterson olefination to furnish the exocyclic α,β-unsaturated ester. Our synthetic endeavors allowed us to conclude that the structure of stresgenin B requires revision.
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Affiliation(s)
- Wei Chuen Chan
- Department of Chemistry , University of Pittsburgh , 219 Parkman Avenue , Pittsburgh , Pennsylvania 15260 , United States
| | - Kazunori Koide
- Department of Chemistry , University of Pittsburgh , 219 Parkman Avenue , Pittsburgh , Pennsylvania 15260 , United States
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21
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Abstract
Palladium is a highly valuable metal in automobile, chemical, and pharmaceutical industries. The metal is generally quantified by atomic absorption spectrometry or inductively coupled plasma mass spectrometry. These techniques are tedious and require expensive instruments that are operated mostly off site. As cost-effective and user-friendly alternatives to these techniques, we previously reported two practical fluorometric or colorimetric methods to quantify palladium. Both methods rely on the use of NaBH4, which cannot be stored in solution for more than 10 days. Commercially available solutions of NaBH4 are partially or fully degraded to di- or triborohydride species and cannot be used for palladium(0)-catalyzed allylic C-O bond cleavage for quantification purposes. Here, we report a new method that replaces NaBH4 with NH2NH2 for the palladium-catalyzed deallylation of fluorogenic and colorimetric chemodosimeter resorufin allyl ether. This method is slower but as sensitive as the most recent method from our laboratory. The method is selective for palladium and depends on the presence of tri(2-furyl)phosphine as a palladium ligand and NH2NH2 as a palladium-reducing reagent.
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Affiliation(s)
- Matthew Nieberding
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Matthew P. Tracey
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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22
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Pham D, Koide K. Discoveries, target identifications, and biological applications of natural products that inhibit splicing factor 3B subunit 1. Nat Prod Rep 2017; 33:637-47. [PMID: 26812544 DOI: 10.1039/c5np00110b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Covering: 1992 to 2015The natural products FR901464, pladienolide, and herboxidiene were discovered as activators of reporter gene systems. Unexpectedly, these compounds target neither transcription nor translation; rather, they target splicing factor 3B subunit 1 of the spliceosome, causing changes in splicing patterns. All of them showed anticancer activity in a low nanomolar range. Since their discovery, these molecules have been used in a variety of biological applications.
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Affiliation(s)
- Dianne Pham
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA.
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA.
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23
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Abstract
MPC1001 is a potent anticancer natural product that contains a violaceic acid moiety. Herein we report the total synthesis of the natural product violaceic acid and its derivative. In this approach, a triazene-directed Ullman coupling proved to be highly effective. We converted the triazene to a hydroxy group by means of a palladium-catalyzed reaction. Treatment of the triazene with trifluoroacetic acid generated an arenediazonium ion that produced an aryl radical, leading to the protodediazoniation and a tricyclic product.
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Affiliation(s)
- Shin Ando
- Department of Chemistry, University of Pittsburgh , 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - James Burrows
- Department of Chemistry, University of Pittsburgh , 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh , 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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24
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Abstract
Rapid palladium (Pd) catalyzed deallylation of an uncoloured reagent within a flowing stream affords a dose dependent colour formation that can be used for convenient online analysis of trace levels of Pd using a modified HPLC instrument.
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Affiliation(s)
- Xiaodong Bu
- Department of Process Research and Development
- Merck Research Laboratories
- Rahway
- USA
| | - Michael Williams
- Department of Process Research and Development
- Merck Research Laboratories
- Rahway
- USA
| | - Junyong Jo
- Department of Process Research and Development
- Merck Research Laboratories
- Rahway
- USA
| | - Kazunori Koide
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
| | - Christopher J. Welch
- Department of Process Research and Development
- Merck Research Laboratories
- Rahway
- USA
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25
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Wojtuszkiewicz A, Sciarrillo R, Jansen G, Assaraf YG, Koide K, Bressin RK, Basu U, Sonneveld E, Peters GJ, Kaspers GJL, Cloos J. Abstract 4336: Spliceosome inhibition as a novel therapeutic option in acute leukemia. Cancer Res 2016. [DOI: 10.1158/1538-7445.am2016-4336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Spliceosome targeting is a novel therapeutic strategy, showing promising results in solid tumors and hematological malignancies. Aberrant splicing of genes involved in apoptosis regulation and drug metabolism was shown to confer chemoresistance in various tumor cells, including acute leukemia. Moreover, increased expression of abnormal splice variants cause reduced sensitivity of leukemic cells to crucial components of current treatment protocols, such as glucocorticoids or methotrexate. Therefore, targeting the spliceosome holds potential to modulate drug resistance-related splicing and to eradicate cells, which do not respond to conventional therapy. In this study, we assessed the in vitro sensitivity of acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML) cells to spliceosome inhibitors, including meayamycin B (MAMB), pladienolide B (PB) and spliceostatin A (SSA).
First, the growth inhibitory activity of MAMB was determined using a 72 h MTT assay in a panel of ALL and AML cell lines, including sublines with acquired resistance to conventional chemotherapeutics. Mechanistically, the effect of MAMB, PB and SSA on splicing profiles, cell cycle distribution and apoptosis induction was assessed in time course experiments. Finally, we compared MAMB sensitivity between 10 primary ALL, 10 AML specimens, and 6 healthy bone marrow (BM) specimens.
Remarkably, both ALL and the notoriously apoptosis-resistant AML cell lines responded to subnanomolar concentrations of MAMB, with IC50 values (50% growth inhibition in the MTT assay) ranging between 0.07 and 0.16 nM. Moreover, MAMB retained full sensitivity towards leukemic sublines resistant to conventional chemotherapeutics with various modes of action, including methotrexate, dexamethasone, bortezomib and imatinib. MAMB, PB and SSA-induced growth inhibition was associated with time and dose-dependent alterations in splicing profiles of selected apoptosis-related genes (including Mcl-1, Bcl-X, FAS and Casp2), concomitant cell cycle arrest (in G1 and G2/M phases) and apoptosis induction (up to 40% after 24 h exposure to 1nM MAMB). Consistent with cell line observations, both primary ALL and AML specimens showed remarkable response to MAMB (mean LC50 = 0.42 nM, range: 0.26-0.69 nM and 0.43 nM, range: 0.33-0.44 nM, respectively), with a significantly lower MAMB sensitivity of healthy BM samples (mean lethal concentration causing 50% cell kill [LC50] value 0.57, range: 0.39-1.13 nM, p = 0.02).
Collectively, this is the first study to demonstrate that spliceosome inhibition constitutes a promising therapeutic option for both ALL and AML patients, including those with acquired resistance to other anti-leukemic drugs.
Financial support by KiKa (Children Cancer Free)
Citation Format: Anna Wojtuszkiewicz, Rocco Sciarrillo, Gerrit Jansen, Yehuda G. Assaraf, Kazunori Koide, Robert K. Bressin, Upamanyu Basu, Edwin Sonneveld, Godefridus J. Peters, Gertjan J L Kaspers, Jacqueline Cloos. Spliceosome inhibition as a novel therapeutic option in acute leukemia. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 4336.
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26
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Basu U, Koide K. Comment on "Virtues and limitations of Pittsburgh green for ozone detection" by C. C. Beltrán, E. A. Palmer, B. R. Buckley and F. Iza, Chem. Commun., 2015, 51, 1579. Chem Commun (Camb) 2016; 52:3847-9. [PMID: 26883090 DOI: 10.1039/c5cc08289g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We previously developed Pittsburgh Green homoallyl ether to quantify trace ozone. Independently, problems were reported when the method was used for excess ozone. Here, we discuss the origin of the reported problems and demonstrate that when this method is used according to our previous report, no problems occur.
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Affiliation(s)
- Upamanyu Basu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA.
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA.
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27
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Koide K, Tracey MP, Bu X, Jo J, Williams MJ, Welch CJ. A competitive and reversible deactivation approach to catalysis-based quantitative assays. Nat Commun 2016; 7:10691. [PMID: 26891765 PMCID: PMC4762883 DOI: 10.1038/ncomms10691] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 01/07/2016] [Indexed: 12/04/2022] Open
Abstract
Catalysis-based signal amplification makes optical assays highly sensitive and widely useful in chemical and biochemical research. However, assays must be fine-tuned to avoid signal saturation, substrate depletion and nonlinear performance. Furthermore, once stopped, such assays cannot be restarted, limiting the dynamic range to two orders of magnitude with respect to analyte concentrations. In addition, abundant analytes are difficult to quantify under catalytic conditions due to rapid signal saturation. Herein, we report an approach in which a catalytic reaction competes with a concomitant inactivation of the catalyst or consumption of a reagent required for signal generation. As such, signal generation proceeds for a limited time, then autonomously and reversibly stalls. In two catalysis-based assays, we demonstrate restarting autonomously stalled reactions, enabling accurate measurement over five orders of magnitude, including analyte levels above substrate concentration. This indicates that the dynamic range of catalysis-based assays can be significantly broadened through competitive and reversible deactivation. Assays for catalytic systems—particularly ones with simple colorimetric readouts—are useful for the rapid evaluation of performance. Here, the authors report an assay based on a concurrent colour-forming reaction working across a wide range that can be stopped to allow measurements and subsequently restarted.
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Affiliation(s)
- Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA
| | - Matthew P Tracey
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA
| | - Xiaodong Bu
- Process and Analytical Chemistry, Merck Research Laboratories, 126 East Lincoln Avenue, Rahway, New Jersey 07065, USA
| | - Junyong Jo
- Process and Analytical Chemistry, Merck Research Laboratories, 126 East Lincoln Avenue, Rahway, New Jersey 07065, USA
| | - Michael J Williams
- Process and Analytical Chemistry, Merck Research Laboratories, 126 East Lincoln Avenue, Rahway, New Jersey 07065, USA
| | - Christopher J Welch
- Process and Analytical Chemistry, Merck Research Laboratories, 126 East Lincoln Avenue, Rahway, New Jersey 07065, USA
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28
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Schreiber CA, Sakuma T, Izumiya Y, Holditch SJ, Hickey RD, Bressin RK, Basu U, Koide K, Asokan A, Ikeda Y. An siRNA Screen Identifies the U2 snRNP Spliceosome as a Host Restriction Factor for Recombinant Adeno-associated Viruses. PLoS Pathog 2015; 11:e1005082. [PMID: 26244496 PMCID: PMC4526370 DOI: 10.1371/journal.ppat.1005082] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 07/13/2015] [Indexed: 12/02/2022] Open
Abstract
Adeno-associated viruses (AAV) have evolved to exploit the dynamic reorganization of host cell machinery during co-infection by adenoviruses and other helper viruses. In the absence of helper viruses, host factors such as the proteasome and DNA damage response machinery have been shown to effectively inhibit AAV transduction by restricting processes ranging from nuclear entry to second-strand DNA synthesis. To identify host factors that might affect other key steps in AAV infection, we screened an siRNA library that revealed several candidate genes including the PHD finger-like domain protein 5A (PHF5A), a U2 snRNP-associated protein. Disruption of PHF5A expression selectively enhanced transgene expression from AAV by increasing transcript levels and appears to influence a step after second-strand synthesis in a serotype and cell type-independent manner. Genetic disruption of U2 snRNP and associated proteins, such as SF3B1 and U2AF1, also increased expression from AAV vector, suggesting the critical role of U2 snRNP spliceosome complex in this host-mediated restriction. Notably, adenoviral co-infection and U2 snRNP inhibition appeared to target a common pathway in increasing expression from AAV vectors. Moreover, pharmacological inhibition of U2 snRNP by meayamycin B, a potent SF3B1 inhibitor, substantially enhanced AAV vector transduction of clinically relevant cell types. Further analysis suggested that U2 snRNP proteins suppress AAV vector transgene expression through direct recognition of intact AAV capsids. In summary, we identify U2 snRNP and associated splicing factors, which are known to be affected during adenoviral infection, as novel host restriction factors that effectively limit AAV transgene expression. Concurrently, we postulate that pharmacological/genetic manipulation of components of the spliceosomal machinery might enable more effective gene transfer modalities with recombinant AAV vectors. Mammalian cells have developed diverse innate/intrinsic immune strategies to counteract viral infections. Post-entry infection steps of a single-strand DNA virus, adeno-associated virus (AAV), are subject to such restrictions. Here, we screened an siRNA library to identify a novel cellular factor involved in AAV restriction. We found PHF5A, a component of the U2 snRNP mRNA splicing factor, blocks expression from recombinant AAV vectors. Disruption of PHF5A expression specifically enhanced AAV vector performance. Moreover, genetic and pharmacological inhibition of other U2 snRNP proteins, but not spliceosome proteins involved in other splicing steps, strongly increased transgene expression from AAV vectors. Further study demonstrated that U2 snRNP proteins recognize incoming AAV capsids to mediate this cellular restriction at the step after second-strand synthesis. In summary, we identify the U2 snRNP spliceosome complex as novel host factors that effectively restrict recombinant AAV vectors. Considering frequent reorganization of host splicing machinery in DNA virus infections, it is conceivable that U2 snRNP plays a role as a broad spectrum antiviral factor and helper viruses have evolved to counteract this restriction through sequestration of snRNP proteins.
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Affiliation(s)
- Claire A. Schreiber
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Toshie Sakuma
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Yoshihiro Izumiya
- Department of Dermatology, UC Davis School of Medicine, Sacramento, California, United States of America
| | - Sara J. Holditch
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Raymond D. Hickey
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Robert K. Bressin
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Upamanyu Basu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Aravind Asokan
- Gene Therapy Center and Department of Genetics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Yasuhiro Ikeda
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
- * E-mail:
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29
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Schreiber C, Sakuma T, Izumiya Y, Holditch S, Hickey R, Bressin R, Basu U, Koide K, Asokan A, Ikeda Y. 41. U2 snRNP Spliceosome Proteins Block Recombinant AAV Vector Transduction. Mol Ther 2015. [DOI: 10.1016/s1525-0016(16)33646-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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30
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Arakawa I, Koide K, Takahashi M, Mizuhashi F. Effect of the tongue rotation exercise training on the oral functions in normal adults - Part 1 investigation of tongue pressure and labial closure strength. J Oral Rehabil 2015; 42:407-13. [DOI: 10.1111/joor.12271] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/10/2014] [Indexed: 11/28/2022]
Affiliation(s)
- I. Arakawa
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry at Niigata; Niigata Japan
| | - K. Koide
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry at Niigata; Niigata Japan
| | - M. Takahashi
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry at Niigata; Niigata Japan
| | - F. Mizuhashi
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry at Niigata; Niigata Japan
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31
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Tracey MP, Pham D, Koide K. Fluorometric imaging methods for palladium and platinum and the use of palladium for imaging biomolecules. Chem Soc Rev 2015; 44:4769-91. [DOI: 10.1039/c4cs00323c] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Palladium and platinum metals have been used to facilitate novel bioimaging methods.
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Affiliation(s)
| | - Dianne Pham
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
| | - Kazunori Koide
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
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32
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Tracey MP, Koide K. Development of a Sustainable Enrichment Strategy for Quantification of Mercury Ions in Complex Samples at the Sub-Parts per Billion Level. Ind Eng Chem Res 2014. [DOI: 10.1021/ie502003f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew P. Tracey
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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33
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Gao Y, Trivedi S, Ferris RL, Koide K. Regulation of HPV16 E6 and MCL1 by SF3B1 inhibitor in head and neck cancer cells. Sci Rep 2014; 4:6098. [PMID: 25139387 PMCID: PMC4138523 DOI: 10.1038/srep06098] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 07/22/2014] [Indexed: 11/16/2022] Open
Abstract
ABT-737 inhibits the anti-apoptotic proteins B-cell lymphoma 2 (BCL-2) and BCL-XL. Meayamycin B switches the splicing pattern of myeloid cell leukemia factor 1 (MCL1) pre-mRNA. Specifically, inhibition of splicing factor 3B subunit 1 (SF3B1) with meayamycin B promotes the generation of the proapoptotic, short splicing variant (MCL1-S) and diminishes the antiapoptotic, long variant (MCL1-L). This action was previously associated with the cytotoxicity of meayamycin B in non-small cell lung carcinoma cell lines. ABT-737 induced apoptosis in response to an ablation of MCL1-L by meayamycin B. In this study, we further exploited this synergistic combination in head and neck squamous cell carcinoma (HNSCC), up to 90% of which overexpress MCL1 and BCL-XL. In a panel of seven HNSCC cell lines, the combination of meayamycin B and ABT-737 rapidly triggered a Bax/Bak-mediated apoptosis that overcame the resistance from HPV16-positive HNSCC against each agent alone. Both RT-PCR and Western blotting showed that meayamycin B up-regulated MCL1-S and down-regulated MCL1-L. Significantly, we discovered that SF3B1 was involved in the splicing of oncogenic HPV16 E6 to produce non-oncogenic HPV16 E6*, indicating that SF3B1 may inhibit HPV16-induced tumorigenesis.
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Affiliation(s)
- Yang Gao
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA
| | - Sumita Trivedi
- University of Pittsburgh Cancer institute, Pittsburgh, Pennsylvania 15213, USA
| | - Robert L Ferris
- University of Pittsburgh Cancer institute, Pittsburgh, Pennsylvania 15213, USA
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA
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34
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Gao Y, Osman S, Koide K. Total Synthesis and Biological Studies of TMC-205 and Analogues as Anticancer Agents and Activators of SV40 Promoter. ACS Med Chem Lett 2014; 5:863-7. [PMID: 25147604 DOI: 10.1021/ml500025p] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 06/19/2014] [Indexed: 11/30/2022] Open
Abstract
TMC-205 is a natural fungal metabolite with antiproliferative activity against cancer cell lines. The light- and air-sensitivity prevented in-depth exploitation of this novel indole derivative. Herein, we report the first synthesis of TMC-205. On the basis of its reactivity with reactive oxygen species, we developed air-stable analogues of TMC-205. These analogues are 2-8-fold more cytotoxic than TMC-205 against HCT-116 colon cancer cell line. Importantly, at noncytotoxic dose levels, these analogues activated the transcription of luciferase reporter gene driven by simian virus 40 promoter (SV40). Further, these small molecules also inhibit firefly luciferase, presumably by direct interaction.
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Affiliation(s)
- Yang Gao
- Department of Chemistry, University of Pittsburgh, 219 Parkman
Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Sami Osman
- Department of Chemistry, University of Pittsburgh, 219 Parkman
Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman
Avenue, Pittsburgh, Pennsylvania 15260, United States
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35
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Abstract
The concentration of human serum albumin (HSA) indicates the health state of individuals and is routinely measured by UV spectroscopy with bromocresol. However, this method tends to overestimate HSA, and more critically, depends highly on the timing, in seconds, of the measurements. Here, we report an analog of 2',7'-dichlorofluorescein that can be used as a fluorescent sensor to quantify HSA in human sera. The accuracy of this new method proved superior to that of bromocresol when an international standard serum sample was analyzed. This method is more convenient than the bromocresol method because it allows for fluorescence measurements during a >15 min period. Colorimetric analysis was also performed to further investigate the effects of the binding of the sensor to HSA. These spectroscopic studies suggest that absorption and emission changes upon HSA binding may be due to the dehydration of the dye and/or stabilization of the tritylic cation species.
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Affiliation(s)
- Sara E Smith
- Department of Chemistry, University of Pittsburgh , 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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36
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Takahashi M, Koide K, Arakawa I, Mizuhashi F. Association between perioral muscle pressure and masticatory performance. J Oral Rehabil 2013; 40:909-15. [DOI: 10.1111/joor.12105] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2013] [Indexed: 11/28/2022]
Affiliation(s)
- M. Takahashi
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry; Niigata Japan
| | - K. Koide
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry; Niigata Japan
| | - I. Arakawa
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry; Niigata Japan
| | - F. Mizuhashi
- Department of Removable Prosthodontics; The Nippon Dental University School of Life Dentistry; Niigata Japan
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37
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Affiliation(s)
- Jessica M. Williams
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania
15260,
United
States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania
15260,
United
States
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38
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Abstract
The myeloid cell leukemia-1 (MCL1) gene encodes antiapoptotic Mcl-1(L) and proapoptotic Mcl-1(S) proteins. In cancer, the Mcl-1(L)/Mcl-1(S) ratio is very high, accounting for the antiapoptotic nature of cancer cells. As such, reducing this ratio can render the cancer cells prone to apoptosis. The Mcl-1(L)/Mcl-1(S) ratio is determined in the alternative pre-mRNA splicing step that is regulated by splicing factor 3B1 (SF3B1). Here, we report that meayamycin B, a potent inhibitor of SF3B1, reversed the dominant isoform from Mcl-1(L) to Mcl-1(S) at the mRNA and protein levels. The resulting proapoptotic cellular environment was further exploited; when meayamycin B was combined with Bcl-x(L) inhibitor ABT-737, the combination treatment triggered apoptosis in nonsmall cell lung cancer A549 and H1299 cells that were otherwise resistant to ABT-737. These results demonstrate that perturbation of the MCL1 splicing with small molecule inhibitors of SF3B1 provides a means to sensitize cancer cells toward Bcl-x(L) inhibitors.
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Affiliation(s)
- Yang Gao
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania
15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania
15260, United States
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39
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Bu X, Koide K, Carder EJ, Welch CJ. Rapid Analysis of Residual Palladium in Pharmaceutical Development Using a Catalysis-Based Fluorometric Method. Org Process Res Dev 2012. [DOI: 10.1021/op3003008] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaodong Bu
- Merck Research Laboratories, Rahway, New Jersey 07065, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh,
Pennsylvania 15260, United States
| | - Evan J. Carder
- Merck Research Laboratories, Rahway, New Jersey 07065, United States
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40
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Abstract
Name your splice: FR901464 analogues and herboxidiene inhibit constitutive splicing, most likely by inhibiting spliceosomal subunit SF3b. A parallel comparison of these compounds in a cell-based assay system showed meayamycin B as the most potent splicing inhibitor among these small molecules.
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Affiliation(s)
- Yang Gao
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA
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Li D, Campbell LD, Austin BA, Koide K. Detection of Trace Palladium in Flasks and Metal Reagents Using a Fluorogenic Tsuji-Trost Reaction. Chempluschem 2012. [DOI: 10.1002/cplu.201200015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ju DY, Bian P, Kumazawa T, Nakano M, Matsuura H, Umetani K, Komdo T, Uozumi Y, Makino K, Noda N, Koide K, Akutsu M, Masuyama K. Drug delivery observation of hydrophobe ferrofluid and magnetite nanoparticals by SPring-8 synchrotron radiation. J Nanosci Nanotechnol 2011; 11:8738-8743. [PMID: 22400252 DOI: 10.1166/jnn.2011.3465] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this study, the composite magnetic nanoparticles of coated SiO nano film with about 8 nm size and high saturation magnetization value, were synthesized by liquid phase precipitation method. The magnetic nanoparticles can be dispersed in various liquid media, widely known as magnetic fluids or ferrofluids with both magnetic and liquid properties. The materials been collected great interests and more and more attentions to focus into Drug Delivery System (DDS) as a new technology in this paper. We use the composite nanoparticles to disperse H2O and inject the solutions into rat's in-vivo organs. And, in the experiments by using a strong photon beam of SPring-8 Synchrotron Radiation facility, the distribution stat and the effects of magnetic field as well as drug delivery behaviour of nanoparticles in the rat' kidney are verified by the in-vivo observations.
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Affiliation(s)
- D Y Ju
- Department of Material Science and Engineering, Saitama Institute of Technology, Saitama, 369-0293, Japan
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Affiliation(s)
- Amanda K. Leslie
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Dandan Li
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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Abstract
Mercury is a major threat to the environment and to human health. It is highly desirable to develop a user-friendly kit for on-site mercury detection. Such a method must be able to detect mercury below the threshold levels for drinking water, 1-2 ppb. We developed a fluorescence method based on the oxymercuration of vinyl ethers to detect mercury in dental and environmental samples. Chloride ions interfered with the oxymercuration reaction, but the addition of AgNO(3) solved this problem. Fine electronic and structural tuning led to the development of a more responsive probe that was less sensitive to chloride ion interference. This second-generation probe could detect 1 ppb mercury ions in water.
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Affiliation(s)
- Shin Ando
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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Koide K, Osman S, Garner AL, Song F, Dixon T, Greenberger JS, Epperly MW. The Use of 3,5,4'-Tri-O-acetylresveratrol as a Potential Pro-drug for Resveratrol Protects Mice from γ-Irradiation-Induced Death. ACS Med Chem Lett 2011; 2:270-274. [PMID: 21826253 DOI: 10.1021/ml100159p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Currently, no drugs are available to protect humans from γ-irradiation-induced death. Because reactive oxygen species are produced upon exposure to γ-irradiation and directly responsible for the resulting death, we hypothesized that antioxidants found in foodstuffs may provide a safe and potent means of antioxidant-dependent radioprotection. Here, we describe our studies investigating the radioprotective properties of resveratrol and 3,5,4'-tri-O-acetylresveratrol. Each of these natural antioxidants was found to protect live cells after γ-irradiation. In mice, the use of 3,5,4'-tri-O-acetylresveratrol with Cremophor EL was particularly effective, indicating that this natural antioxidant may be a leading candidate for radioprotective drug development.
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Affiliation(s)
| | | | | | | | - Tracy Dixon
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Hillman Cancer Center, 5117 Centre Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Joel S. Greenberger
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Hillman Cancer Center, 5117 Centre Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Michael W. Epperly
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Hillman Cancer Center, 5117 Centre Avenue, Pittsburgh, Pennsylvania 15213, United States
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Abstract
Functionalized diketopiperazines (dioxopiperazines) are an important class of molecules in medicinal chemistry and material science. Herein we report a diastereoselective synthesis of diketopiperazine bis-α,β-epoxides via the oxidation of exocyclic olefins. Although six diastereomers may be formed by this approach, only one or two of them were observed.
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Affiliation(s)
- Shin Ando
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA
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Osman S, Albert BJ, Wang Y, Li M, Czaicki NL, Koide K. Structural requirements for the antiproliferative activity of pre-mRNA splicing inhibitor FR901464. Chemistry 2010; 17:895-904. [PMID: 21226105 DOI: 10.1002/chem.201002402] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Indexed: 11/08/2022]
Abstract
FR901464, a natural product isolated from a bacterium source, activates a reporter gene, inhibits pre-mRNA splicing, and shows antitumor activity. We previously reported the development of a more potent analogue, meayamycin, through the total synthesis of FR901464. Herein, we report detailed structure-activity relationships of FR901464 that revealed the significance of the epoxide, carbon atoms in the tetrahydropyran ring, the Z geometry of the side chain, the 1,3-diene moiety, the C4-hydroxy group, and the C2''-carbonyl group. Importantly, the methyl group of the acetyl substituent was found to be inessential, leading to a new potent analogue. Additionally, partially based on in vivo data, we synthesized and evaluated potentially more metabolically stable analogues for their antiproliferative activity. These structural insights into FR901464 may contribute to the simplification of the natural product for further drug development.
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Affiliation(s)
- Sami Osman
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA
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Song F, Carder EJ, Kohler CC, Koide K. Studies Toward an Ideal Fluorescence Method to Measure Palladium in Functionalized Organic Molecules: Effects of Sodium Borohydride, Temperature, Phosphine Ligand, and Phosphate Ions on Kinetics. Chemistry 2010; 16:13500-8. [DOI: 10.1002/chem.201001316] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Garner AL, St Croix CM, Pitt BR, Leikauf GD, Ando S, Koide K. Erratum: Specific fluorogenic probes for ozone in biological and atmospheric samples. Nat Chem 2010. [DOI: 10.1038/nchem.621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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