1
|
Konno R, Ishikawa M, Nakajima D, Endo Y, Ohara O, Kawashima Y. Universal Pretreatment Development for Low-input Proteomics Using Lauryl Maltose Neopentyl Glycol. Mol Cell Proteomics 2024; 23:100745. [PMID: 38447790 PMCID: PMC10999711 DOI: 10.1016/j.mcpro.2024.100745] [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: 09/25/2023] [Revised: 02/23/2024] [Accepted: 03/01/2024] [Indexed: 03/08/2024] Open
Abstract
In recent years, there has been a growing demand for low-input proteomics, particularly in the context of single-cell proteomics (SCP). In this study, we have developed a lauryl maltose neopentyl glycol (LMNG)-assisted sample preparation (LASP) method. This method effectively reduces protein and peptide loss in samples by incorporating LMNG, a surfactant, into the digestion solution and subsequently removing the LMNG simply via reversed phase solid-phase extraction. The advantage of removing LMNG during sample preparation for general proteomic analysis is the prevention of mass spectrometry (MS) contamination. When we applied the LASP method to the low-input SP3 method and on-bead digestion in coimmunoprecipitation-MS, we observed a significant improvement in the recovery of the digested peptides. Furthermore, we have established a simple and easy sample preparation method for SCP based on the LASP method and identified a median of 1175 proteins from a single HEK239F cell using liquid chromatography (LC)-MS/MS with a throughput of 80 samples per day.
Collapse
Affiliation(s)
- Ryo Konno
- Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Chiba, Japan
| | - Masaki Ishikawa
- Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Chiba, Japan
| | - Daisuke Nakajima
- Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Chiba, Japan
| | - Yusuke Endo
- Department of Frontier Research and Development, Kazusa DNA Research Institute, Kisarazu, Chiba, Japan
| | - Osamu Ohara
- Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Chiba, Japan
| | - Yusuke Kawashima
- Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Chiba, Japan; Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, Japan.
| |
Collapse
|
2
|
Kowalski K. Synthesis and chemical transformations of glycol nucleic acid (GNA) nucleosides. Bioorg Chem 2023; 141:106921. [PMID: 37871392 DOI: 10.1016/j.bioorg.2023.106921] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/09/2023] [Accepted: 10/16/2023] [Indexed: 10/25/2023]
Abstract
Xeno nucleic acids (XNA) are an increasingly important class of hypermodified nucleic acids with great potential in bioorganic chemistry and synthetic biology. Glycol nucleic acid (GNA) is constructed from a three-carbon 1,2-propanediol (propylene glycol) backbone attached to a nucleobase entity, representing the simplest known XNA. This review is intended to present GNA nucleosides from a synthetic chemistry perspective-a perspective that serves as a starting point for biological studies. Therefore this account focuses on synthetic methods for GNA nucleoside synthesis, as well as their postsynthetic chemical transformations. The properties and biological activity of GNA constituents are also highlighted. A literature survey shows four major approaches toward GNA nucleoside scaffold synthesis. These approaches pertain to glycidol ring-opening, Mitsunobu, SN2, and dihydroxylation reactions. The general arsenal of reactions used in GNA chemistry is versatile and encompasses the Sonogashira reaction, Michael addition, silyl-Hilbert-Johnson reaction, halogenation, alkylation, cyclization, Rh-catalyzed N-allylation, Sharpless catalytic dihydroxylation, and Yb(OTf)3-catalyzed etherification. Additionally, various phosphorylation reactions have enabled the synthesis of diverse types of GNA nucleotides, dinucleoside phosphates, phosphordiamidites, and oligos. Furthermore, recent advances in GNA chemistry have resulted in the synthesis of previously unknown redox-active (ferrocenyl) and luminescent (pyrenyl and phenanthrenyl) GNA nucleosides, which are also covered in this review.
Collapse
Affiliation(s)
- Konrad Kowalski
- University of Lodz, Faculty of Chemistry, Department of Organic Chemistry, Tamka 12, PL-91403 Lodz, Poland.
| |
Collapse
|
3
|
Egli M, Schlegel MK, Manoharan M. Acyclic ( S)-glycol nucleic acid ( S-GNA) modification of siRNAs improves the safety of RNAi therapeutics while maintaining potency. RNA 2023; 29:402-414. [PMID: 36725319 PMCID: PMC10019370 DOI: 10.1261/rna.079526.122] [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] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Glycol nucleic acid (GNA) is an acyclic nucleic acid analog connected via phosphodiester bonds. Crystal structures of RNA-GNA chimeric duplexes indicated that nucleotides of the right-handed (S)-GNA were better accommodated in the right-handed RNA duplex than were the left-handed (R)-isomers. GNA nucleotides adopt a rotated nucleobase orientation within all duplex contexts, pairing with complementary RNA in a reverse Watson-Crick mode, which explains the inabilities of GNA C and G to form strong base pairs with complementary nucleotides. Transposition of the hydrogen bond donor and acceptor pairs using novel (S)-GNA isocytidine and isoguanosine nucleotides resulted in stable base-pairing with the complementary G and C ribonucleotides, respectively. GNA nucleotide or dinucleotide incorporation into an oligonucleotide increased resistance against 3'-exonuclease-mediated degradation. Consistent with the structural observations, small interfering RNAs (siRNAs) modified with (S)-GNA had greater in vitro potencies than identical sequences containing (R)-GNA. (S)-GNA is well tolerated in the seed regions of antisense and sense strands of a GalNAc-conjugated siRNA in vitro. The siRNAs containing a GNA base pair in the seed region had in vivo potency when subcutaneously injected into mice. Importantly, seed pairing destabilization resulting from a single GNA nucleotide at position 7 of the antisense strand mitigated RNAi-mediated off-target effects in a rodent model. Two GNA-modified siRNAs have shown an improved safety profile in humans compared with their non-GNA-modified counterparts, and several additional siRNAs containing the GNA modification are currently in clinical development.
Collapse
Affiliation(s)
- Martin Egli
- Department of Biochemistry, School of Medicine, Vanderbilt University, Nashville, Tennessee 37232, USA
| | - Mark K Schlegel
- Alnylam Pharmaceuticals, Inc., Cambridge, Massachusetts 02142, USA
| | | |
Collapse
|
4
|
Neitz H, Bessi I, Kachler V, Michel M, Höbartner C. Tailored Tolane-Perfluorotolane Assembly as Supramolecular Base Pair Replacement in DNA. Angew Chem Int Ed Engl 2023; 62:e202214456. [PMID: 36344446 PMCID: PMC10107946 DOI: 10.1002/anie.202214456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Indexed: 11/09/2022]
Abstract
Arene-fluoroarene interactions offer outstanding possibilities for engineering of supramolecular systems, including nucleic acids. Here, we implement the tolane-perfluorotolane interaction as base pair replacement in DNA. Tolane (THH) and perfluorotolane (TFF) moieties were connected to acyclic backbone units, comprising glycol nucleic acid (GNA) or butyl nucleic acid (BuNA) building blocks, that were incorporated via phosphoramidite chemistry at opposite positions in a DNA duplex. Thermodynamic analyses by UV thermal melting revealed a compelling stabilization by THH/TFF heteropairs only when connected to the BuNA backbone, but not with the shorter GNA linker. Detailed NMR studies confirmed the preference of the BuNA backbone for enhanced polar π-stacking. This work defines how orthogonal supramolecular interactions can be tailored by small constitutional changes in the DNA backbone, and it inspires future studies of arene-fluoroarene-programmed assembly of DNA.
Collapse
Affiliation(s)
- Hermann Neitz
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
| | - Irene Bessi
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
| | - Valentin Kachler
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
| | - Manuela Michel
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
| | - Claudia Höbartner
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
- Center for Nanosystems Chemistry (CNC)University of WürzburgTheodor-Boveri-Weg97074WürzburgGermany
| |
Collapse
|
5
|
Abstract
This review covers research findings reported over the past decade concerning the ability of low complexity (LC) domains to self-associate in a manner leading to their phase separation from aqueous solution. We focus our message upon the reductionist use of two forms of phase separation as biochemical assays to study how LC domains might function in living cells. Cells and their varied compartments represent extreme examples of material condensates. Over the past half century, biochemists, structural biologists, and molecular biologists have resolved the mechanisms driving innumerable forms of macromolecular condensation. In contrast, we remain largely ignorant as to how 10%-20% of our proteins actually work to assist in cell organization. This enigmatic 10%-20% of the proteome corresponds to gibberish-like LC sequences. We contend that many of these LC sequences move in and out of a structurally ordered, self-associated state as a means of offering a combination of organizational specificity and dynamic pliability to living cells. Finally, we speculate that ancient proteins may have behaved similarly, helping to condense, organize, and protect RNA early during evolution.
Collapse
Affiliation(s)
- Masato Kato
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, Texas 75390, USA
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | - Xiaoming Zhou
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Steven L McKnight
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, Texas 75390, USA
| |
Collapse
|
6
|
Liu X, Jiang S, Ma L, Qu J, Zhao L, Zhu X, Ding J. Time-dependent effect of 1,6-hexanediol on biomolecular condensates and 3D chromatin organization. Genome Biol 2021; 22:230. [PMID: 34404453 PMCID: PMC8369800 DOI: 10.1186/s13059-021-02455-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 07/30/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Biomolecular condensates have been implicated in multiple cellular processes. However, the global role played by condensates in 3D chromatin organization remains unclear. At present, 1,6-hexanediol (1,6-HD) is the only available tool to globally disrupt condensates, yet the conditions of 1,6-HD vary considerably between studies and may even trigger apoptosis. RESULTS In this study, we first analyzed the effects of different concentrations and treatment durations of 1,6-HD and found that short-term exposure to 1.5% 1,6-HD dissolved biomolecular condensates whereas long-term exposure caused aberrant aggregation without affecting cell viability. Based on this condition, we drew a time-resolved map of 3D chromatin organization and found that short-term treatment with 1.5% 1,6-HD resulted in reduced long-range interactions, strengthened compartmentalization, homogenized A-A interactions, B-to-A compartment switch and TAD reorganization, whereas longer exposure had the opposite effects. Furthermore, the long-range interactions between condensate-component-enriched regions were markedly weakened following 1,6-HD treatment. CONCLUSIONS In conclusion, our study finds a proper 1,6-HD condition and provides a resource for exploring the role of biomolecular condensates in 3D chromatin organization.
Collapse
Affiliation(s)
- Xinyi Liu
- RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Shaoshuai Jiang
- RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Lin Ma
- RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jiale Qu
- RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Longying Zhao
- RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xing Zhu
- RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Junjun Ding
- RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China.
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China.
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China.
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, 511436, China.
- West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, 610041, China.
| |
Collapse
|
7
|
Shi M, You K, Chen T, Hou C, Liang Z, Liu M, Wang J, Wei T, Qin J, Chen Y, Zhang MQ, Li T. Quantifying the phase separation property of chromatin-associated proteins under physiological conditions using an anti-1,6-hexanediol index. Genome Biol 2021; 22:229. [PMID: 34404448 PMCID: PMC8369651 DOI: 10.1186/s13059-021-02456-2] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 07/30/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Liquid-liquid phase separation (LLPS) is an important organizing principle for biomolecular condensation and chromosome compartmentalization. However, while many proteins have been reported to undergo LLPS, quantitative and global analysis of chromatin LLPS property remains absent. RESULTS Here, by combining chromatin-associated protein pull-down, quantitative proteomics and 1,6-hexanediol (1,6-HD) treatment, we develop Hi-MS and define an anti-1,6-HD index of chromatin-associated proteins (AICAP) to quantify 1,6-HD sensitivity of chromatin-associated proteins under physiological conditions. Compared with known physicochemical properties involved in phase separation, we find that proteins with lower AICAP are associated with higher content of disordered regions, higher hydrophobic residue preference, higher mobility and higher predicted LLPS potential. We also construct BL-Hi-C libraries following 1,6-HD treatment to study the sensitivity of chromatin conformation to 1,6-HD treatment. We find that the active chromatin and high-order structures, as well as the proteins enriched in corresponding regions, are more sensitive to 1,6-HD treatment. CONCLUSIONS Our work provides a global quantitative measurement of LLPS properties of chromatin-associated proteins and higher-order chromatin structure. Hi-MS and AICAP data provide an experimental tool and quantitative resources valuable for future studies of biomolecular condensates.
Collapse
Affiliation(s)
- Minglei Shi
- MOE Key Laboratory of Bioinformatics, Bioinformatics Division and Center for Synthetic & Systems Biology, BNRist, School of Medicine, Tsinghua University, Beijing, 100084, China.
| | - Kaiqiang You
- Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Taoyu Chen
- Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Chao Hou
- Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Zhengyu Liang
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California, La Jolla, San Diego, CA, 92093, USA
| | - Mingwei Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, 102206, China
| | - Jifeng Wang
- Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Taotao Wei
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jun Qin
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, 102206, China
| | - Yang Chen
- MOE Key Laboratory of Bioinformatics, Bioinformatics Division and Center for Synthetic & Systems Biology, BNRist, School of Medicine, Tsinghua University, Beijing, 100084, China.
- The State Key Laboratory of Medical Molecular Biology, Department of Molecular Biology and Biochemistry, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.
| | - Michael Q Zhang
- MOE Key Laboratory of Bioinformatics, Bioinformatics Division and Center for Synthetic & Systems Biology, BNRist, School of Medicine, Tsinghua University, Beijing, 100084, China.
- Department of Biological Sciences, Center for Systems Biology, The University of Texas, Richardson, TX, 75080-3021, USA.
| | - Tingting Li
- Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China.
| |
Collapse
|
8
|
Moses ME, Lund PM, Bohr SSR, Iversen JF, Kæstel-Hansen J, Kallenbach AS, Iversen L, Christensen SM, Hatzakis NS. Single-Molecule Study of Thermomyces lanuginosus Lipase in a Detergency Application System Reveals Diffusion Pattern Remodeling by Surfactants and Calcium. ACS Appl Mater Interfaces 2021; 13:33704-33712. [PMID: 34235926 DOI: 10.1021/acsami.1c08809] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lipases comprise one of the major enzyme classes in biotechnology with applications within, e.g., baking, brewing, biocatalysis, and the detergent industry. Understanding the mechanisms of lipase function and regulation is therefore important to facilitate the optimization of their function by protein engineering. Advances in single-molecule studies in model systems have provided deep mechanistic insights on lipase function, such as the existence of functional states, their dependence on regulatory cues, and their correlation to activity. However, it is unclear how these observations translate to enzyme behavior in applied settings. Here, single-molecule tracking of individual Thermomyces lanuginosus lipase (TLL) enzymes in a detergency application system allowed real-time direct observation of spatiotemporal localization, and thus diffusional behavior, of TLL enzymes on a lard substrate. Parallelized imaging of thousands of individual enzymes allowed us to observe directly the existence and quantify the abundance and interconversion kinetics between three diffusional states that we recently provided evidence to correlate with function. We observe redistribution of the enzyme's diffusional pattern at the lipid-water interface as well as variations in binding efficiency in response to surfactants and calcium, demonstrating that detergency effectors can drive the sampling of lipase functional states. Our single-molecule results combined with ensemble activity assays and enzyme surface binding efficiency readouts allowed us to deconvolute how application conditions can significantly alter protein functional dynamics and/or surface binding, both of which underpin enzyme performance. We anticipate that our results will inspire further efforts to decipher and integrate the dynamic nature of lipases, and other enzymes, in the design of new biotechnological solutions.
Collapse
Affiliation(s)
- Matias E Moses
- Novozymes A/S, Biologiens Vej 2, DK-2800 Kgs. Lyngby, Denmark
- Department of Chemistry & Nano-science Center, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Philip M Lund
- Novozymes A/S, Biologiens Vej 2, DK-2800 Kgs. Lyngby, Denmark
- Department of Chemistry & Nano-science Center, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Søren S-R Bohr
- Department of Chemistry & Nano-science Center, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Josephine F Iversen
- Department of Chemistry & Nano-science Center, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Jacob Kæstel-Hansen
- Department of Chemistry & Nano-science Center, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Amalie S Kallenbach
- Department of Chemistry & Nano-science Center, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Lars Iversen
- Novozymes A/S, Biologiens Vej 2, DK-2800 Kgs. Lyngby, Denmark
| | | | - Nikos S Hatzakis
- Department of Chemistry & Nano-science Center, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
- Novo Nordisk Foundation Centre for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, DK-2200 Copenhagen N, Denmark
| |
Collapse
|
9
|
Choi SH, Lee DY, Kang S, Lee MK, Lee JH, Lee SH, Lee HL, Lee HY, Jeong YIL. Caffeic Acid Phenethyl Ester-Incorporated Radio-Sensitive Nanoparticles of Phenylboronic Acid Pinacol Ester-Conjugated Hyaluronic Acid for Application in Radioprotection. Int J Mol Sci 2021; 22:6347. [PMID: 34198522 PMCID: PMC8231778 DOI: 10.3390/ijms22126347] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 05/07/2021] [Revised: 05/31/2021] [Accepted: 06/08/2021] [Indexed: 12/30/2022] Open
Abstract
We synthesized phenylboronic acid pinacol ester (PBPE)-conjugated hyaluronic acid (HA) via thiobis(ethylamine) (TbEA) linkage (abbreviated as HAsPBPE conjugates) to fabricate the radiosensitive delivery of caffeic acid phenetyl ester (CAPE) and for application in radioprotection. PBPE was primarily conjugated with TbEA and then PBPE-TbEA conjugates were conjugated again with hyaluronic acid using carbodiimide chemistry. CAPE-incorporated nanoparticles of HAsPBPE were fabricated by the nanoprecipitation method and then the organic solvent was removed by dialysis. CAPE-incorporated HAsPBPE nanoparticles have a small particle size of about 80 or 100 nm and they have a spherical shape. When CAPE-incorporated HAsPBPE nanoparticles were irradiated, nanoparticles became swelled or disintegrated and their morphologies were changed. Furthermore, the CAPE release rate from HAsPBPE nanoparticles were increased according to the radiation dose, indicating that CAPE-incorporated HAsPBPE nanoparticles have radio-sensitivity. CAPE and CAPE-incorporated HAsPBPE nanoparticles appropriately prevented radiation-induced cell death and suppressed intracellular accumulation of reactive oxygen species (ROS). CAPE and CAPE-incorporated HAsPBPE nanoparticles efficiently improved survivability of mice from radiation-induced death and reduced apoptotic cell death. We suggest that HAsPBPE nanoparticles are promising candidates for the radio-sensitive delivery of CAPE.
Collapse
Affiliation(s)
- Seon-Hee Choi
- Biomedical R&D Center, Pusan National University Yangsan Hospital, Gyeongnam 50612, Korea; (S.-H.C.); (H.-L.L.)
| | - Dong-Yeon Lee
- Department of Radiation Oncology, Dongnam Institute of Radiological & Medical Sciences, Pusan 46033, Korea;
| | - Sohi Kang
- Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea;
| | - Min-Kyung Lee
- Department of Dental Hygiene, Dong-Eui University, Pusan 47340, Korea;
| | - Jae-Heun Lee
- Department of Radiological Science, Dong-Eui University, Pusan 47340, Korea; (J.-H.L.); (S.-H.L.)
| | - Sang-Heon Lee
- Department of Radiological Science, Dong-Eui University, Pusan 47340, Korea; (J.-H.L.); (S.-H.L.)
| | - Hye-Lim Lee
- Biomedical R&D Center, Pusan National University Yangsan Hospital, Gyeongnam 50612, Korea; (S.-H.C.); (H.-L.L.)
| | - Hyo-Young Lee
- Department of Radiological Science, Dong-Eui University, Pusan 47340, Korea; (J.-H.L.); (S.-H.L.)
| | - Young-IL Jeong
- Biomedical R&D Center, Pusan National University Yangsan Hospital, Gyeongnam 50612, Korea; (S.-H.C.); (H.-L.L.)
| |
Collapse
|
10
|
Moon YJ, Yoon SJ, Koo JH, Yoon Y, Byun HJ, Kim HS, Khang G, Chun HJ, Yang DH. β-Cyclodextrin/Triclosan Complex-Grafted Methacrylated Glycol Chitosan Hydorgel by Photocrosslinking via Visible Light Irradiation for a Tissue Bio-Adhesive. Int J Mol Sci 2021; 22:E700. [PMID: 33445775 PMCID: PMC7828271 DOI: 10.3390/ijms22020700] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/05/2021] [Accepted: 01/08/2021] [Indexed: 01/02/2023] Open
Abstract
Accelerating wound healing with minimized bacterial infection has become a topic of interest in the development of the new generation of tissue bio-adhesives. In this study, we fabricated a hydrogel system (MGC-g-CD-ic-TCS) consisting of triclosan (TCS)-complexed beta-cyclodextrin (β-CD)-conjugated methacrylated glycol chitosan (MGC) as an antibacterial tissue adhesive. Proton nuclear magnetic resonance (1H NMR) and differential scanning calorimetry (DSC) results showed the inclusion complex formation between MGC-g-CD and TCS. The increase of storage modulus (G') of MGC-g-CD-ic-TCS after visible light irradiation for 200 s indicated its hydrogelation. The swollen hydrogel in aqueous solution resulted in two release behaviors of an initial burst and sustained release. Importantly, in vitro and in vivo results indicated that MGC-g-CD-ic-TCS inhibited bacterial infection and improved wound healing, suggesting its high potential application as an antibacterial tissue bio-adhesive.
Collapse
Affiliation(s)
- Young Jae Moon
- Department of Biochemistry & Molecular Biology & Orthopaedic Surgery, Research Institute for Endocrine Sciences, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju 54896, Korea; (Y.J.M.); (J.-H.K.)
| | - Sun-Jung Yoon
- Department of Orthopedic Surgery, Research Institute of Clinical Medicine of Jeonbuk National University, Biomedical Research Institute of Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju 54896, Korea;
| | - Jeung-Hyun Koo
- Department of Biochemistry & Molecular Biology & Orthopaedic Surgery, Research Institute for Endocrine Sciences, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju 54896, Korea; (Y.J.M.); (J.-H.K.)
| | - Yihyun Yoon
- Institute of Cell and Tissue Engineering, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (Y.Y.); (H.J.B.); (H.S.K.); (H.J.C.)
| | - Hye Jun Byun
- Institute of Cell and Tissue Engineering, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (Y.Y.); (H.J.B.); (H.S.K.); (H.J.C.)
| | - Hyeon Soo Kim
- Institute of Cell and Tissue Engineering, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (Y.Y.); (H.J.B.); (H.S.K.); (H.J.C.)
| | - Gilson Khang
- Department of BIN Convergence Technology & Polymer Nano Science & Technology and Polymer BIN Research Center, Jeonbuk National University, Jeonju 54896, Korea;
| | - Heung Jae Chun
- Institute of Cell and Tissue Engineering, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (Y.Y.); (H.J.B.); (H.S.K.); (H.J.C.)
- Department of Biomedical & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
| | - Dae Hyeok Yang
- Institute of Cell and Tissue Engineering, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (Y.Y.); (H.J.B.); (H.S.K.); (H.J.C.)
| |
Collapse
|
11
|
Abstract
FANCM is involved in eukaryotic DNA-damage recognition and activates the Fanconi anemia (FA) pathway through complex formation. MHF is one of the FANCM-associating components and contains a histone-fold DNA-binding domain. Loss of the FANCM-MHF interaction compromises the activation of the FA pathway, resulting in chromosomal instability. Thus, formation of the FANCM-MHF complex is important for function, but its nature largely remains elusive. Here, the aim was to reveal the molecular and structural basis for the stability of the FANCM-MHF complex. A recombinant tripartite complex containing chicken FANCM (MHF interaction region), MHF1 and MHF2 was expressed and purified. The purified tripartite complex was crystallized under various conditions and three different crystals were obtained from similar crystallization conditions. Unexpectedly, structure determination revealed that one of the crystals contained the FANCM-MHF complex but that the other two contained the MHF complex without FANCM. How FANCM dissociates from MHF was further investigated and it was found that the presence of 2-methyl-2,4-pentanediol (MPD) and an oxidative environment may have promoted its release. However, under these conditions MHF retained its complexed form. FANCM-MHF interaction involves a mixture of hydrophobic/hydrophilic interactions, and chicken FANCM contains several nonconserved cysteines within this region which may lead to aggregation with other FANCM-MHF molecules. These results indicate an unexpected nature of the FANCM-MHF complex and the data can be used to improve the stability of the complex for biochemical and structural analyses.
Collapse
Affiliation(s)
- Sho Ito
- Department of Biological Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijyuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Tatsuya Nishino
- Department of Biological Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijyuku, Katsushika-ku, Tokyo 125-8585, Japan
| |
Collapse
|
12
|
Zhu L, Bu G, Jing L, Shi D, Lee MY, Gonen T, Liu W, Nannenga BL. Structure Determination from Lipidic Cubic Phase Embedded Microcrystals by MicroED. Structure 2020; 28:1149-1159.e4. [PMID: 32735770 PMCID: PMC7544639 DOI: 10.1016/j.str.2020.07.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 06/02/2020] [Accepted: 07/13/2020] [Indexed: 01/22/2023]
Abstract
The lipidic cubic phase (LCP) technique has proved to facilitate the growth of high-quality crystals that are otherwise difficult to grow by other methods. However, the crystal size optimization process could be time and resource consuming, if it ever happens. Therefore, improved techniques for structure determination using these small crystals is an important strategy in diffraction technology development. Microcrystal electron diffraction (MicroED) is a technique that uses a cryo-transmission electron microscopy to collect electron diffraction data and determine high-resolution structures from very thin micro- and nanocrystals. In this work, we have used modified LCP and MicroED protocols to analyze crystals embedded in LCP converted by 2-methyl-2,4-pentanediol or lipase, including Proteinase K crystals grown in solution, cholesterol crystals, and human adenosine A2A receptor crystals grown in LCP. These results set the stage for the use of MicroED to analyze microcrystalline samples grown in LCP, especially for those highly challenging membrane protein targets.
Collapse
Affiliation(s)
- Lan Zhu
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe, AZ 85287, USA; School of Molecular Sciences, Arizona State University, 551 East University Drive, Tempe, AZ 85287, USA
| | - Guanhong Bu
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe, AZ 85287, USA; School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA
| | - Liang Jing
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe, AZ 85287, USA; School of Molecular Sciences, Arizona State University, 551 East University Drive, Tempe, AZ 85287, USA
| | - Dan Shi
- Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA
| | - Ming-Yue Lee
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe, AZ 85287, USA; School of Molecular Sciences, Arizona State University, 551 East University Drive, Tempe, AZ 85287, USA
| | - Tamir Gonen
- Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA; Departments of Biological Chemistry and Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Wei Liu
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe, AZ 85287, USA; School of Molecular Sciences, Arizona State University, 551 East University Drive, Tempe, AZ 85287, USA.
| | - Brent L Nannenga
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe, AZ 85287, USA; School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA.
| |
Collapse
|
13
|
Abstract
In the development of dermal drug formulations and cosmetics, understanding the penetration properties of the active ingredients is crucial. Given that widespread methods, including tape stripping, lack in spatial resolution, while being time- and labour-intensive, Confocal Raman Microscopy is a promising alternative. In optimizing topically applied formulations, or the development of generic formulations, comparative in-situ measurements have a huge potential of saving time and resources. In this work, we show our approach to in-situ skin penetration analysis by confocal Raman Microscopy. To analyse feasibility of the approach, we used caffeine solutions as model vehicles and tested the effectiveness of 1,2-pentanediol as a penetration enhancer for delivery to the skin.
Collapse
Affiliation(s)
| | - Dominique Lunter
- Department of Pharmaceutical Technology, Eberhard Karls University, Auf der Morgenstelle 8, 72076 Tuebingen, Germany;
| |
Collapse
|
14
|
Mossine AV, Tanzey SS, Brooks AF, Makaravage KJ, Ichiishi N, Miller JM, Henderson BD, Erhard T, Bruetting C, Skaddan MB, Sanford MS, Scott PJH. Synthesis of high-molar-activity [ 18F]6-fluoro-L-DOPA suitable for human use via Cu-mediated fluorination of a BPin precursor. Nat Protoc 2020; 15:1742-1759. [PMID: 32269382 PMCID: PMC7333241 DOI: 10.1038/s41596-020-0305-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 09/16/2019] [Accepted: 01/27/2020] [Indexed: 11/09/2022]
Abstract
[18F]6-fluoro-L-DOPA ([18F]FDOPA) is a diagnostic radiopharmaceutical for positron emission tomography (PET) imaging that is used to image Parkinson's disease, brain tumors, and focal hyperinsulinism of infancy. Despite these important applications, [18F]FDOPA PET remains underutilized because of synthetic challenges associated with accessing the radiotracer for clinical use; these stem from the need to radiofluorinate a highly electron-rich catechol ring in the presence of an amino acid. To address this longstanding challenge in the PET radiochemistry community, we have developed a one-pot, two-step synthesis of high-molar-activity [18F]FDOPA by Cu-mediated fluorination of a pinacol boronate (BPin) precursor. The method is fully automated, has been validated to work well at two separate sites (an academic facility with a cyclotron on site and an industry lab purchasing [18F]fluoride from an outside vendor), and provides [18F]FDOPA in reasonable radiochemical yield (2.44 ± 0.70 GBq, 66 ± 19 mCi, 5 ± 1%), excellent radiochemical purity (>98%) and high molar activity (76 ± 30 TBq/mmol, 2,050 ± 804 Ci/mmol), n = 26. Herein we report a detailed protocol for the synthesis of [18F]FDOPA that has been successfully implemented at two sites and validated for production of the radiotracer for human use.
Collapse
Affiliation(s)
- Andrew V Mossine
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
- Curium Pharma, Nuclear Medicine Manufacturing, Noblesville, IN, USA
| | - Sean S Tanzey
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - Allen F Brooks
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
| | - Katarina J Makaravage
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
- Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Cambridge, MA, USA
| | - Naoko Ichiishi
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
- Takeda Pharmaceuticals International Co., Process Chemistry, Boston, MA, USA
| | - Jason M Miller
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI, USA
- Environmental Analysis Branch, US Army Corps of Engineers, Detroit, MI, USA
| | | | - Thomas Erhard
- AbbVie Deustschland GmbH & Co. KG Ludwigschafen, Ludwigshafen, Germany
| | | | | | - Melanie S Sanford
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA.
| | - Peter J H Scott
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA.
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI, USA.
| |
Collapse
|
15
|
Luo T, Chen Z, Wang F, Yin S, Liu P, Zhang J, Yang Z. Endothelium-Independent Vasodilatory Effects of Isodillapiolglycol Isolated from Ostericum citriodorum. Molecules 2020; 25:molecules25040885. [PMID: 32079290 PMCID: PMC7070945 DOI: 10.3390/molecules25040885] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 01/14/2020] [Revised: 02/09/2020] [Accepted: 02/14/2020] [Indexed: 12/01/2022] Open
Abstract
Ostericum citriodorum is a plant with a native range in China used in herbal medicine for treating angina pectoris. In this study, we investigated the vasodilatory effects of isodillapiolglycol (IDG), which is one of the main ingredients isolated from O. citriodorum ethyl acetate extract, in Sprague–Dawley rat aortic rings, and measured intracellular Ca2+ ([Ca2+]in) using a molecular fluo-3/AM probe. The results show that IDG dose-dependently relaxed endothelium-intact or -denuded aortic rings pre-contracted with noradrenaline (NE) or potassium chloride (KCl), and inhibited CaCl2-induced contraction in high K+ depolarized aortic rings. Tetraethyl ammonium chloride (a Ca2+-activated K+ channel blocker) or verapamil (an L-type Ca2+ channel blocker) significantly reduced the relaxation of IDG in aortic rings pre-contracted with NE. In vascular smooth muscle cells, IDG inhibited the increase in [Ca2+]in stimulated by KCl in Krebs solution; likewise, IDG also attenuated the increase in [Ca2+]in induced by NE or subsequent supplementation of CaCl2. These findings demonstrate that IDG relaxes aortic rings in an endothelium-independent manner by reducing [Ca2+]in, likely through inhibition of the receptor-gated Ca2+ channel and the voltage-dependent Ca2+ channel, and through opening of the Ca2+-activated K+ channel.
Collapse
Affiliation(s)
- Tengshuo Luo
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (T.L.); (Z.C.)
| | - Zewei Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (T.L.); (Z.C.)
| | - Fengyun Wang
- Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Shanshan Yin
- HEC Pharm R&D Center, Dongguan 523871, China; (S.Y.); (P.L.)
| | - Pan Liu
- HEC Pharm R&D Center, Dongguan 523871, China; (S.Y.); (P.L.)
| | - Jun Zhang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (T.L.); (Z.C.)
- Correspondence: (J.Z.); (Z.Y.); Tel.: +86-020-39356997 (J.Z.)
| | - Zhonghua Yang
- Medical College of Acupuncture Moxibustion and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
- Correspondence: (J.Z.); (Z.Y.); Tel.: +86-020-39356997 (J.Z.)
| |
Collapse
|
16
|
Nanco CR, Poklis JL, Hiler MM, Breland AB, Eissenberg T, Wolf CE. An Ultra-High-Pressure Liquid Chromatographic Tandem Mass Spectrometry Method for the Analysis of Benzoyl Ester Derivatized Glycols and Glycerol. J Anal Toxicol 2019; 43:720-725. [PMID: 31436292 PMCID: PMC6921292 DOI: 10.1093/jat/bkz071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 06/01/2019] [Accepted: 06/09/2019] [Indexed: 01/02/2023] Open
Abstract
Presented is an ultra-high-pressure liquid chromatographic tandem mass spectrometry (UPLC-MS/MS) method developed for the detection of propylene glycol, glycerol, ethylene glycol and diethylene glycol using isotopically labeled standards in urine as part of ongoing studies to evaluate whether urinary propylene glycol and/or vegetable glycerin concentration are indicators of recent use. Propylene glycol and vegetable glycerol are found in many products that are consumed and used including electronic cigarettes (e-cigarettes). E-cigarettes are battery-powered devices used as an alternative to traditional cigarettes. The liquid formulations aerosolized in these devices largely consist of propylene glycol and/or vegetable glycerol. Published reports regarding the ratio of propylene glycol to glycerol content in these formulations ranged from 50:50 to 100 percent of either. For the analysis of urine specimens from both users and non-users of e-cigarettes, calibrators, controls and specimens were derivatized using benzoyl chloride prior to analysis. They were analyzed using a Waters AcQuity Xevo TQ-S Micro UPLC-MS/MS. Chromatographic separation was performed on an AcQuity UPLC BEH C18 1.7 um, 2.1 × 50 mm, column using a 20 mM ammonium formate in water and 20 mM ammonium formate in methanol as the mobile phase. The method was validated using SWGTOX guidelines for linearity, precision and accuracy, stability, carryover and limit of detection. The linear range was determined using a seven-point calibration curve ranging between 0.5 and 100 mcg/mL. The bias for all validation controls was determined to be ±20% of the expected concentrations with CVs of <15%. A total of 124 urine specimens analyzed collected with 50 specimens collected from self-reported non-smokers (cigarettes/e-cigarettes) confirmed cotinine free using the DRI® Cotinine Assay (Thermo Scientific, Waltham, MA) and 74 specimens collected before and after 12 hours self-reported e-cigarettes abstinence e-cigarette users. Propylene glycol and glycerol were determined to have concentration ranges of "none detected" to 1470 and "none detected" to 2950 mcg/mL, respectively.
Collapse
Affiliation(s)
| | - Justin L Poklis
- Department of Pharmacology & Toxicology,Richmond, VA, 23298-0613
| | - Marzena M Hiler
- Department of Psychology, Virginia Commonwealth University, Richmond, VA VA 23298-0710
- Center for the Study of Tobacco Products, VA 23220
| | - Alison B Breland
- Department of Psychology, Virginia Commonwealth University, Richmond, VA VA 23298-0710
- Center for the Study of Tobacco Products, VA 23220
| | - Thomas Eissenberg
- Department of Psychology, Virginia Commonwealth University, Richmond, VA VA 23298-0710
- Center for the Study of Tobacco Products, VA 23220
| | - Carl E Wolf
- Virginia Commonwealth University
- Pathology at Virginia Commonwealth University, Richmond, VA 23298-0165, USA
| |
Collapse
|
17
|
Wang K, Zheng M, Lester KL, Han Z. Light-induced Nrf2 -/- mice as atrophic age-related macular degeneration model and treatment with nanoceria laden injectable hydrogel. Sci Rep 2019; 9:14573. [PMID: 31601909 PMCID: PMC6787253 DOI: 10.1038/s41598-019-51151-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 09/25/2019] [Indexed: 12/31/2022] Open
Abstract
Elevated oxidative stress and associated reactive oxygen species (ROS) accumulation are hallmarks in the induction and progression of age-related macular degeneration (AMD). By exposing nuclear factor erythroid 2-related factor (Nrf2) knockout (Nrf2-/-) mice to mild white light, we were able to generate a new dry-AMD like murine model to the study. This animal model developed phenotypes of photoreceptor degeneration, retinal function impairment, ROS accumulation, and inflammation reaction in a relatively shorter time. In the treatment of this animal model we utilized an antioxidative and water soluble nanoparticle known as glycol chitosan coated cerium oxide nanoparticles (GCCNP). The delivery of GCCNP protected retina against progressive retinal oxidative damage. Further combination of GCCNP with alginate-gelatin based injectable hydrogel provided synergistic antioxidant effects and achieved a more rapid recovery of the retinal pigment epithelium and photoreceptor cells. This combined treatment technique has the potential to translate into a clinical intervention for the treatment of AMD.
Collapse
Affiliation(s)
- Kai Wang
- Department of Ophthalmology, the University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Min Zheng
- Department of Ophthalmology, the University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Kaitlyn Lee Lester
- Department of Ophthalmology, the University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Zongchao Han
- Department of Ophthalmology, the University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Carolina Institute for Nano Medicine, the University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Division of Pharmacoengineering & Molecular Pharmaceutics, Eshelman School of Pharmacy, the University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
| |
Collapse
|
18
|
Miele D, Catenacci L, Sorrenti M, Rossi S, Sandri G, Malavasi L, Dacarro G, Ferrari F, Bonferoni MC. Chitosan Oleate Coated Poly Lactic-Glycolic Acid (PLGA) Nanoparticles versus Chitosan Oleate Self-Assembled Polymeric Micelles, Loaded with Resveratrol. Mar Drugs 2019; 17:E515. [PMID: 31480614 PMCID: PMC6780743 DOI: 10.3390/md17090515] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 07/30/2019] [Revised: 08/19/2019] [Accepted: 08/28/2019] [Indexed: 01/12/2023] Open
Abstract
Chitosan oleate (CS-OA), a chitosan salt with amphiphilic properties, has demonstrated the ability to self-assemble in aqueous environment to give polymeric micelles useful to load poorly soluble drugs. More recently, CS-OA was proposed to stabilize nanoemulsions during the preparation by emulsification and solvent evaporation of poly lactic-glycolic acid (PLGA) nanoparticles (NPs) loaded with curcumin. Positive mucoadhesive behavior and internalization properties were demonstrated for these NPs attributable to the presence of positive charge at the NP surface. In the present paper, two CS-OA-based nanosystems, micelles and PLGA NPs, were compared with the aim of elucidating their physico-chemical characteristics, and especially their interaction with cell substrates. The two systems were loaded with resveratrol (RSV), a hydrophobic polyphenol endowed with anti-cancerogenic, anti-inflammatory, and heart/brain protective effects, but with low bioavailability mainly due to poor aqueous solubility. Calorimetric analysis and X-ray spectra demonstrated amorphization of RSV, confirming its affinity for hydrophobic domains of polymeric micelles and PLGA core of NPs. TGA decomposition patterns suggest higher stability of PLGA-NPs compared with polymeric micelles, that anyway resulted more stable than expected, considering the RSV release profiles, and the cell line interaction results.
Collapse
Affiliation(s)
- Dalila Miele
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Laura Catenacci
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Milena Sorrenti
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Silvia Rossi
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Giuseppina Sandri
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Lorenzo Malavasi
- Department of Chemistry, University of Pavia, Viale Taramelli 14, 27100 Pavia, Italy
| | - Giacomo Dacarro
- Department of Chemistry, University of Pavia, Viale Taramelli 14, 27100 Pavia, Italy
| | - Franca Ferrari
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | | |
Collapse
|
19
|
Zhang S, Li Y, Shi C, Guo F, He C, Cao Z, Hu J, Cui C, Liu H. Induced-fit adsorption of diol-based porous organic polymers for tetracycline removal. Chemosphere 2018; 212:937-945. [PMID: 30286550 DOI: 10.1016/j.chemosphere.2018.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 06/10/2018] [Revised: 08/24/2018] [Accepted: 09/01/2018] [Indexed: 06/08/2023]
Abstract
Adsorption is recognized as one of the most efficient approaches for antibiotics removal from water. Inspired by the enzyme-substrate interaction model, we proposed induced-fit adsorption (IFA) model, and rationally designed and fabricated diol-based porous organic polymers (POPs) as adsorbents for tetracycline (TC) removal. For 2,3-naphthalenediol-based POP (NTdiol-POP), the preferable geometry of diol-groups contributed to the high binding energy with TC species and flexible methylene linkages between neighboring rigid naphthalene rings gave rise to precisely matching between TC species and adsorbents, that is, the induced-fit conformation change. As a result, NTdiol-POP exhibited a high saturated adsorption capacity of 155.8 mg g-1. More importantly, NTdiol-POP exhibited excellent TC removal efficiencies in both concentrated solution (96% for 4 p.p.m) and trace level solution (97% for 250 p.p.b).
Collapse
Affiliation(s)
| | - Yankai Li
- School of Chemistry and Molecular Engineering, China
| | - Chunhong Shi
- Shanghai Songjiang Institute for Food and Drug Control, 28 Middle Zhongshan Road, Shanghai, 201600, China
| | - Fangyuan Guo
- School of Chemistry and Molecular Engineering, China
| | - Congze He
- School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Zan Cao
- Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, China
| | - Jun Hu
- School of Chemistry and Molecular Engineering, China.
| | - Changzheng Cui
- Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, China.
| | - Honglai Liu
- School of Chemistry and Molecular Engineering, China
| |
Collapse
|
20
|
Abstract
There is growing interest in the topic of intracellular phase transitions that lead to the formation of biologically regulated biomolecular condensates. These condensates are membraneless bodies formed by phase separation of key protein and nucleic acid molecules from the cytoplasmic or nucleoplasmic milieus. The drivers of phase separation are referred to as scaffolds whereas molecules that preferentially partition into condensates formed by scaffolds are known as clients. Recent advances have shown that it is possible to generate physical and functional facsimiles of many biomolecular condensates in vitro. This is achieved by titrating the concentration of key scaffold proteins and solution parameters such as salt concentration, pH, or temperature. The ability to reproduce phase separation in vitro allows one to compare the relationships between information encoded in the sequences of scaffold proteins and the driving forces for phase separation. Many scaffold proteins include intrinsically disordered regions whereas others are entirely disordered. Our focus is on comparative assessments of phase separation for different scaffold proteins, specifically intrinsically disordered linear multivalent proteins. We highlight the importance of coexistence curves known as binodals for quantifying phase behavior and comparing driving forces for sequence-specific phase separation. We describe the information accessible from full binodals and highlight different methods for-and challenges associated with-mapping binodals. In essence, we provide a wish list for in vitro characterization of phase separation of intrinsically disordered proteins. Fulfillment of this wish list through key advances in experiment, computation, and theory should bring us closer to being able to predict in vitro phase behavior for scaffold proteins and connect this to the functions and features of biomolecular condensates.
Collapse
Affiliation(s)
- Ammon E Posey
- Department of Biomedical Engineering and Center for Biological Systems Engineering, Washington University in St. Louis, St. Louis, MO, United States
| | - Alex S Holehouse
- Department of Biomedical Engineering and Center for Biological Systems Engineering, Washington University in St. Louis, St. Louis, MO, United States
| | - Rohit V Pappu
- Department of Biomedical Engineering and Center for Biological Systems Engineering, Washington University in St. Louis, St. Louis, MO, United States.
| |
Collapse
|
21
|
Lei J, Deng L, Li X, Xu Y, Li D, Mu C. Comparative study of the physicochemical and photocatalytic properties of water-soluble polymer-capped TiO 2 nanoparticles. Environ Sci Pollut Res Int 2018; 25:26259-26266. [PMID: 29978313 DOI: 10.1007/s11356-018-2679-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
TiO2 shows great potential as ideal and powerful photocatalyst to degrade and eliminate harmful organic pollutants from waste water. It is desirable to prepare anatase TiO2 with good aqueous solubility and photocatalytic activity for water decontamination. In this paper, water-soluble TiO2 nanoparticles were successfully prepared using polytetramethylene ether glycol (PTMG), poly(ethylene glycol) (PEG), and poly(propylene glycol) (PPG) as stabilizers. The anatase phase of TiO2 was well controlled by introduction of HCl in the reaction system. The results showed that all the polymer-capped TiO2 were well dissolved in water and their aqueous solutions could maintain stable for more than 2 months. The photocatalytic activities of polymer-capped TiO2 were evaluated by monitoring the degradation of Rhodamine B (RhB) with Degussa P25 as a control. The results showed that all the polymer-capped TiO2 presented better photocatalytic activity than that of Degussa P25. PTMG capped TiO2 exhibited the longest average lifetime of charge carriers, indicating the lowest charge recombination rate. Thus, PTMG capped TiO2 presented the best photocatalytic activity. In summary, PTMG, PEG, and PPG can be used as stabilizers to prepare water-soluble TiO2. PTMG is an ideal stabilizer for the synthesis of water-soluble TiO2 with good photocatalytic activity.
Collapse
Affiliation(s)
- Jinfeng Lei
- Department of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Lei Deng
- Department of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Xinying Li
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu, 610041, China
| | - Yongbin Xu
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, China
| | - Defu Li
- Department of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
| | - Changdao Mu
- Department of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
| |
Collapse
|
22
|
Yukihara EG, Akselrod MS, Fomenko V, Harrison J, Million M, Assenmacher F, Stabilini A, Meier K. COMPARISON BETWEEN PADC AND FNTD NEUTRON DETECTOR SYSTEMS IN BLIND TESTS. Radiat Prot Dosimetry 2018; 180:225-229. [PMID: 29036622 DOI: 10.1093/rpd/ncx171] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 08/18/2017] [Indexed: 06/07/2023]
Abstract
The objective of this study was to compare a neutron dosimetry system based on polyallyl diglycol carbonate (PADC) detectors with a new system based on Al2O3:C,Mg fluorescence nuclear track detectors (FNTD). The irradiations, performed as part of an intercomparison organized by the Physikalisch-Technische Bundesanstalt (PTB), Germany, were on a PMMA phantom with 252Cf or 241Am-Be source, usually with the phantom surface perpendicular to the radiation beam (0° angle), and with Hp(10) values between 0.3 and 7 mSv. One 252Cf irradiation was performed at 30° angle, and one with an additional 1 mSv gamma irradiation. The results showed an agreement between the two techniques with an average and maximum difference between PADCs and FNTDs of 1.5 and 22%, respectively, if one compares only cases of doses >1 mSv. For one of the irradiation conditions with dose of 0.9 mSv, use of the incorrect calibration factor for the FNTD (252Cf instead of 241Am-Be) led to reported values ~×2 larger than the given doses, due to low statistics in the determination of the ratio between 6Li-doped glass and polyethylene neutron converters. Although the FNTD track analysis algorithm may need further development, the results presented here demonstrate the feasibility of the FNTD technology and indicate areas requiring improvements.
Collapse
Affiliation(s)
- E G Yukihara
- Department of Radiation Safety and Security, Paul Scherrer Institute, Villigen PSI, Switzerland
- Physics Department, Oklahoma State University, Stillwater, OK, USA
| | - M S Akselrod
- Landauer Inc., Crystal Growth Division, 7231/2 Eastgate St., Stillwater, OK, USA
| | - V Fomenko
- Landauer Inc., Crystal Growth Division, 7231/2 Eastgate St., Stillwater, OK, USA
| | - J Harrison
- Landauer Inc., Crystal Growth Division, 7231/2 Eastgate St., Stillwater, OK, USA
| | - M Million
- Landauer Europe, 9 rue Paul Dautier CS, Vélizy-Villacoublay, France
| | - F Assenmacher
- Department of Radiation Safety and Security, Paul Scherrer Institute, Villigen PSI, Switzerland
| | - A Stabilini
- Department of Radiation Safety and Security, Paul Scherrer Institute, Villigen PSI, Switzerland
- Politecnico di Milano, Dipartimento di Energia, via la Masa 34, Milan, Italy
| | - K Meier
- Department of Radiation Safety and Security, Paul Scherrer Institute, Villigen PSI, Switzerland
| |
Collapse
|
23
|
Gao Y, Guo R, Fan R, Liu Z, Kong W, Zhang P, Du FP. Wettability of pear leaves from three regions characterized at different stages after flowering using the OWRK method. Pest Manag Sci 2018; 74:1804-1809. [PMID: 29389059 DOI: 10.1002/ps.4878] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 06/07/2023]
Abstract
BACKGROUND A better understanding of leaf surface wettability is critical to improve the adhesion of liquid pesticides. Leaf surface wettability is dependent on the property of the liquid as well as the physical and chemical properties of the leaf, which vary with climate and growth stage. The aim of this study was to characterize the wettability of pear leaves from three different climatic regions at different stages after flowering. RESULTS The contact angles of different test liquids were measured on both adaxial and abaxial pear leaf surfaces and the Owens-Wendt-Rabel-Kaelble (OWRK) method was used to calculate surface free energy (SFE) and its polar and non-polar components. The results demonstrated that the SFE of both the adaxial and abaxial surface of the pear leaf, and the proportion of polar component, increased with increasing time after flowering. At early growth stages, pear leaves were highly hydrophobic, similar to a polytetrafluoroethylene surface, whereas at later growth stages, pear leaves were hydrophobic, more similar to a polymethylmethacrylate surface. Also, the SFE differed with climatic region. Factors influencing these changes are discussed. CONCLUSION Changes in contact angles and SFE correlated with the change of the leaf surface wettability. Leaves became easier to wet (higher SFE), with an overall increasing polar component to the surface, with increasing age after flowering. As expected, changes in wettability were found in pear leaves at different stages after flowering and in different regions (P < 0.05). Pear leaves from Yuanping were easier to wet than leaves from Yuci and Linyi, and adaxial surfaces were easier to wet than abaxial surfaces. These results provide beneficial information for the application of agrochemicals for improved wetting and spreading behavior. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Yue Gao
- College of Science, China Agricultural University, Beijing, People's Republic of China
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan, People's Republic of China
| | - Ruifeng Guo
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan, People's Republic of China
| | - Renjun Fan
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan, People's Republic of China
| | - Zhongfang Liu
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan, People's Republic of China
| | - Weina Kong
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan, People's Republic of China
| | - Pengjiu Zhang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan, People's Republic of China
| | - Feng-Pei Du
- College of Science, China Agricultural University, Beijing, People's Republic of China
| |
Collapse
|
24
|
Caresana M, Parravicini A, Coria S, Stabilini A, Assenmacher F, Yukihara EG. COMPARISON OF PADC NEUTRON DETECTORS FROM DIFFERENT SUPPLIERS. Radiat Prot Dosimetry 2018; 180:196-200. [PMID: 29036486 DOI: 10.1093/rpd/ncx193] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Indexed: 06/07/2023]
Abstract
The objective of this study was to compare poly-allyl diglycol carbonate (PADC) track detectors from different suppliers for linear energy transfer (LET) spectrometry and neutron dosimetry. PADCs are commonly used for passive personal neutron dosimetry, where a common approach is to couple the PADC with a plastic radiator to generate secondary charged particles. The neutron dose can be estimated using the track density or the average LET of the secondary particles. The characterisation of PADC in terms of LET spectrometric capability and neutron sensitivity was previously performed using PADC from Intercast S.r.l., Parma, Italy, but this company stopped the production. Since it is common experience that material from different suppliers can have different properties, it became necessary to perform a comparison of PADCs from different suppliers with the Intercast material. The study permits to compare the reading procedures used at Politecnico di Milano and at the Paul Scherrer Institute.
Collapse
Affiliation(s)
- M Caresana
- Politecnico di Milano, Dipartimento di Energia, via la Masa 34, Milan, Italy
| | | | - S Coria
- MI.AM srl, via De Amicis 5, Fabbiano, Italy
| | - A Stabilini
- Politecnico di Milano, Dipartimento di Energia, via la Masa 34, Milan, Italy
- Paul Scherrer Institute, Department of Radiation Safety and Security, Villigen PSI, Switzerland
| | - F Assenmacher
- Paul Scherrer Institute, Department of Radiation Safety and Security, Villigen PSI, Switzerland
| | - E G Yukihara
- Paul Scherrer Institute, Department of Radiation Safety and Security, Villigen PSI, Switzerland
- Oklahoma State University, Physics Department, Stillwater, OK, USA
| |
Collapse
|
25
|
Saberi B, Chockchaisawasdee S, Golding JB, Scarlett CJ, Stathopoulos CE. Physical and mechanical properties of a new edible film made of pea starch and guar gum as affected by glycols, sugars and polyols. Int J Biol Macromol 2017; 104:345-359. [PMID: 28606842 DOI: 10.1016/j.ijbiomac.2017.06.051] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/31/2017] [Accepted: 06/07/2017] [Indexed: 11/18/2022]
Abstract
The influence of different plasticizers (glycols, sugars and polyols) on the moisture sorption, mechanical, physical, optical, and microstructure characteristics of pea starch-guar gum (PSGG) film was studied. All plasticizers formed homogeneous, transparent, and smooth films, while PEG-400 did not produce film with suitable characteristics. Fourier transform infrared (FTIR) spectroscopy results indicated some interaction between plasticizers and the polymers. Scanning electron microscopy (SEM) observations of the films presented surfaces without cracks, breaks, or openings which were indicator of the miscibility and compatibility of employed plasticizers with PSGG films. The results showed that the films containing plasticizers with higher functional groups had lower equilibrium moisture content at aw <0.4. In general, a reduction in tensile strength and Young's modulus and an increase in elongation at break were detected when molecular weight of plasticizers and relative humidity increased in all film formulations. Films plasticized with monosaccharide showed similar mechanical properties to those with sorbitol, but lower solubility and water vapour permeability (WVP), higher transparency and moisture content than the sorbitol-plasticized films. The most noticeable plasticization effect was exerted by following order: glycerol > EG > PG > xylitol > fructose > sorbitol > mannitol > galactose > glucose > sucrose > maltitol.
Collapse
Affiliation(s)
- Bahareh Saberi
- School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
| | - Suwimol Chockchaisawasdee
- School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia; Division of Food and Drink, School of Science, Engineering and Technology, University of Abertay, Dundee DD1 1HG, UK
| | - John B Golding
- School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia; NSW Department of Primary Industries, Ourimbah, NSW 2258, Australia
| | - Christopher J Scarlett
- School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia
| | - Costas E Stathopoulos
- Division of Food and Drink, School of Science, Engineering and Technology, University of Abertay, Dundee DD1 1HG, UK
| |
Collapse
|
26
|
Shinde BA, Dholakia BB, Hussain K, Panda S, Meir S, Rogachev I, Aharoni A, Giri AP, Kamble AC. Dynamic metabolic reprogramming of steroidal glycol-alkaloid and phenylpropanoid biosynthesis may impart early blight resistance in wild tomato (Solanum arcanum Peralta). Plant Mol Biol 2017; 95:411-423. [PMID: 28980117 DOI: 10.1007/s11103-017-0660-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 05/15/2017] [Accepted: 09/12/2017] [Indexed: 05/22/2023]
Abstract
Exploration with high throughput leaf metabolomics along with functional genomics in wild tomato unreveal potential role of steroidal glyco-alkaloids and phenylpropanoids during early blight resistance. Alternaria solani severely affects tomato (Solanum lycopersicum L.) yield causing early blight (EB) disease in tropical environment. Wild relative, Solanum arcanum Peralta could be a potential source of EB resistance; however, its underlying molecular mechanism largely remains unexplored. Hence, non-targeted metabolomics was applied on resistant and susceptible S. arcanum accessions upon A. solani inoculation to unravel metabolic dynamics during different stages of disease progression. Total 2047 potential metabolite peaks (mass signals) were detected of which 681 and 684 metabolites revealed significant modulation and clear differentiation in resistant and susceptible accessions, respectively. Majority of the EB-triggered metabolic changes were active from steroidal glycol-alkaloid (SGA), lignin and flavonoid biosynthetic pathways. Further, biochemical and gene expression analyses of key enzymes from these pathways positively correlated with phenotypic variation in the S. arcanum accessions indicating their potential role in EB. Additionally, transcription factors regulating lignin biosynthesis were also up-regulated in resistant plants and electrophoretic mobility shift assay revealed sequence-specific binding of rSaWRKY1 with MYB20 promoter. Moreover, transcript accumulation of key genes from phenylpropanoid and SGA pathways along with WRKY and MYB in WRKY1 transgenic tomato lines supported above findings. Overall, this study highlights vital roles of SGAs as phytoalexins and phenylpropanoids along with lignin accumulation unrevealing possible mechanistic basis of EB resistance in wild tomato.
Collapse
Affiliation(s)
- Balkrishna A Shinde
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra, 411007, India
- Division of Biochemical Sciences, Plant Molecular Biology Unit, CSIR-National Chemical Laboratory, Pune, Maharashtra, 411008, India
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Bhushan B Dholakia
- Division of Biochemical Sciences, Plant Molecular Biology Unit, CSIR-National Chemical Laboratory, Pune, Maharashtra, 411008, India
| | - Khalid Hussain
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra, 411007, India
| | - Sayantan Panda
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra, 411007, India
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Sagit Meir
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Ilana Rogachev
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Asaph Aharoni
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Ashok P Giri
- Division of Biochemical Sciences, Plant Molecular Biology Unit, CSIR-National Chemical Laboratory, Pune, Maharashtra, 411008, India.
| | - Avinash C Kamble
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra, 411007, India.
| |
Collapse
|
27
|
Hu Y, Li N, Li G, Wang A, Cong Y, Wang X, Zhang T. Sustainable Production of o-Xylene from Biomass-Derived Pinacol and Acrolein. ChemSusChem 2017; 10:2880-2885. [PMID: 28621498 DOI: 10.1002/cssc.201700823] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 06/16/2017] [Indexed: 05/24/2023]
Abstract
o-Xylene (OX) is a large-volume commodity chemical that is conventionally produced from fossil fuels. In this study, an efficient and sustainable two-step route is used to produce OX from biomass-derived pinacol and acrolein. In the first step, the phosphotungstic acid (HPW)-catalyzed pinacol dehydration in 1-ethyl-3-methylimidazolium chloride ([emim]Cl) selectively affords 2,3-dimethylbutadiene. The high selectivity of this reaction can be ascribed to the H-bonding interaction between Cl- and the hydroxy group of pinacol. The stabilization of the carbocation intermediate by the surrounding anion Cl- may be another reason for the high selectivity. Notably, the good reusability of the HPW/[emim]Cl system can reduce the waste output and production cost. In the second step, OX is selectively produced by a Diels-Alder reaction of 2,3-dimethylbutadiene and acrolein, followed by a Pd/C-catalyzed decarbonylation/aromatization cascade in a one-pot fashion. The sustainable two-step process efficiently produces renewable OX in 79 % overall yield. Analogously, biomass-derived crotonaldehyde and pinacol can also serve as the feedstocks for the production of 1,2,4-trimethylbenzene.
Collapse
Affiliation(s)
- Yancheng Hu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Ning Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Guangyi Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Aiqin Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Yu Cong
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Xiaodong Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| | - Tao Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, PR China
| |
Collapse
|
28
|
Talsma DT, Katta K, Boersema M, Adepu S, Naggi A, Torri G, Stegeman C, Navis G, van Goor H, Hillebrands JL, Yazdani S, van den Born J. Increased migration of antigen presenting cells to newly-formed lymphatic vessels in transplanted kidneys by glycol-split heparin. PLoS One 2017; 12:e0180206. [PMID: 28665959 PMCID: PMC5493359 DOI: 10.1371/journal.pone.0180206] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 06/12/2017] [Indexed: 11/18/2022] Open
Abstract
Background Chronic renal transplant dysfunction is characterized by loss of renal function and tissue remodeling, including chronic inflammation and lymph vessel formation. Proteoglycans are known for their chemokine presenting capacity. We hypothesize that interruption of the lymphatic chemokine–proteoglycan interaction interferes with the lymphatic outflow of leukocytes from the renal graft and might decrease the anti-graft allo-immune response. Methods In a rat renal chronic transplant dysfunction model (female Dark-Agouti to male Wistar Furth), chemokines were profiled by qRT-PCR in microdissected tubulo-interstitial tissue. Disruption of lymphatic chemokine–proteoglycan interaction was studied by (non-anticoagulant) heparin-derived polysaccharides in vitro and in renal allografts. The renal allograft function was assessed by rise in plasma creatinine and urea. Results Within newly-formed lymph vessels of transplanted kidneys, numerous CD45+ leukocytes were found, mainly MHCII+, ED-1-, IDO-, HIS14-, CD103- antigen presenting cells, most likely representing a subset of dendritic cells. Treatment of transplanted rats with regular heparin and two different (non-)anticoagulant heparin derivatives revealed worsening of kidney function only in the glycol-split heparin treated group despite a two-fold reduction of tubulo-interstitial leukocytes (p<0.02). Quantitative digital image analysis however revealed increased numbers of intra-lymphatic antigen-presenting cells only in the glycol-split heparin group (p<0.01). The number of intra-lymphatic leukocytes significantly correlates with plasma creatinine and urea, and inversely with creatinine clearance. Conclusions Treatment of transplanted rats with glycol-split heparin significantly increases the number of intra-lymphatic antigen presenting cells, by increased renal diffusion of lymphatic chemokines, thereby increasing the activation and recruitment of antigen presenting cells towards the lymph vessel. This effect is unwanted in the transplantation setting, but might be advantageous in e.g., dendritic cell vaccination.
Collapse
Affiliation(s)
- Ditmer T. Talsma
- Department of Nephrology, University Medical Centre Groningen, Groningen, Netherlands
- * E-mail:
| | - Kirankumar Katta
- Department of Nephrology, University Medical Centre Groningen, Groningen, Netherlands
| | - Miriam Boersema
- Department of Pathology and Medical Biology, University Medical Centre Groningen, Groningen, Netherlands
| | - Saritha Adepu
- Department of Nephrology, University Medical Centre Groningen, Groningen, Netherlands
| | | | | | - Coen Stegeman
- Department of Nephrology, University Medical Centre Groningen, Groningen, Netherlands
| | - Gerjan Navis
- Department of Nephrology, University Medical Centre Groningen, Groningen, Netherlands
| | - Harry van Goor
- Department of Pathology and Medical Biology, University Medical Centre Groningen, Groningen, Netherlands
| | - Jan-Luuk Hillebrands
- Department of Pathology and Medical Biology, University Medical Centre Groningen, Groningen, Netherlands
| | - Saleh Yazdani
- Department of Nephrology, University Medical Centre Groningen, Groningen, Netherlands
| | - Jacob van den Born
- Department of Nephrology, University Medical Centre Groningen, Groningen, Netherlands
| |
Collapse
|
29
|
Brentzel ZJ, Barnett KJ, Huang K, Maravelias CT, Dumesic JA, Huber GW. Chemicals from Biomass: Combining Ring-Opening Tautomerization and Hydrogenation Reactions to Produce 1,5-Pentanediol from Furfural. ChemSusChem 2017; 10:1351-1355. [PMID: 28277620 DOI: 10.1002/cssc.201700178] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [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: 02/01/2017] [Revised: 02/08/2017] [Indexed: 05/16/2023]
Abstract
A process for the synthesis of 1,5-pentanediol (1,5-PD) with 84 % yield from furfural is developed, utilizing dehydration/hydration, ring-opening tautomerization, and hydrogenation reactions. Although this process has more reaction steps than the traditional direct hydrogenolysis of tetrahydrofurfuryl alcohol (THFA), techno-economic analyses demonstrate that this process is the economically preferred route for the synthesis of biorenewable 1,5-PD. 2-Hydroxytetrahydropyran (2-HY-THP) is the key reaction pathway intermediate that allows for a decrease in the minimum selling price of 1,5-PD. The reactivity of 2-HY-THP is 80 times greater than that of THFA over a bimetallic hydrogenolysis catalyst. This enhanced reactivity is a result of the ring-opening tautomerization to 5-hydoxyvaleraldehyde and subsequent hydrogenation to 1,5-PD.
Collapse
Affiliation(s)
- Zachary J Brentzel
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Kevin J Barnett
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Kefeng Huang
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Christos T Maravelias
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - James A Dumesic
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - George W Huber
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| |
Collapse
|
30
|
Kralova J, Kolar M, Kahle M, Truksa J, Lettlova S, Balusikova K, Bartunek P. Glycol porphyrin derivatives and temoporfin elicit resistance to photodynamic therapy by different mechanisms. Sci Rep 2017; 7:44497. [PMID: 28295025 PMCID: PMC5353759 DOI: 10.1038/srep44497] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 10/11/2016] [Accepted: 02/08/2017] [Indexed: 12/14/2022] Open
Abstract
The development of drug resistance is a major problem which often occurs during anticancer chemotherapies. Photodynamic therapy (PDT) has been studied as an alternative treatment modality for drug-resistant tumors, however the question of resistance to PDT and potential cross-resistance with chemotherapy has yet to be fully answered. To investigate the mechanism of resistance to PDT, we developed an in vitro experimental model system in a mouse mammary carcinoma cell line 4T1. We used two ethylene glycol derivatives of tetraphenylporphyrin, and tetraphenylchlorin derivative, temoporfin, as photosensitizers (PS). PDT-resistant clones were obtained by exposure to a set concentration of PS followed by irradiation with increasing light doses. PDT resistance to soluble glycol porphyrins was mediated mainly by increased drug efflux through ABCB1 (P-glycoprotein) as we demonstrated by specific ABCB1 knockdown experiments, which in turn rescued the sensitivity of resistant cells to PDT. In contrast, resistance raised to temoporfin, which is generally more lipophilic than glycol porphyrins, elicited mechanism based on sequestration of the drug to lysosomes. The resistance that is acquired from a particular PS could be overcome by using a different PS, which is not susceptible to the same mechanism(s) of resistance. Elucidation of the underlying mechanisms in various types of resistance might facilitate improvements in PDT treatment design.
Collapse
Affiliation(s)
- Jarmila Kralova
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
| | - Michal Kolar
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
- Laboratory of Genomics and Bioinformatics, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
| | - Michal Kahle
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
| | - Jaroslav Truksa
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
- Laboratory of Tumor Resistance, Institute of Biotechnology of the ASCR, v. v. i., BIOCEV, Vestec, Prague-West, Czech Republic
| | - Sandra Lettlova
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
- Laboratory of Tumor Resistance, Institute of Biotechnology of the ASCR, v. v. i., BIOCEV, Vestec, Prague-West, Czech Republic
| | - Kamila Balusikova
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
- Division of Cell and Molecular Biology & Center for Research of Diabetes, Metabolism and Nutrition, Third Faculty of Medicine, Charles University in Prague, Czech Republic
| | - Petr Bartunek
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics of the ASCR, v. v. i., Prague, Czech Republic
| |
Collapse
|
31
|
Abstract
Two methods were proposed for determining alpha-particle fluence for radiobiological experiments. The first involved calculating the probabilities of hitting the target for alpha particles emitted from a source through Monte Carlo simulations, which when multiplied by the activity of the source gave the fluence at the target. The second relied on the number of chemically etched alpha-particle tracks developed on a solid-state nuclear track detector (SSNTD) that was irradiated by an alpha-particle source. The etching efficiencies (defined as percentages of latent tracks created by alpha particles from the source that could develop to become visible tracks upon chemical etching) were computed through Monte Carlo simulations, which when multiplied by the experimentally counted number of visible tracks would also give the fluence at the target. We studied alpha particles with an energy of 5.486 MeV emitted from an 241Am source, and considered the alpha-particle tracks developed on polyallyldiglycol carbonate film, which is a common SSNTD. Our results showed that the etching efficiencies were equal to one for source-film distances of from 0.6 to 3.5 cm for a circular film of radius of 1 cm, and for source-film distances of from 1 to 3 cm for circular film of radius of 2 cm. For circular film with a radius of 3 cm, the etching efficiencies never reached 1. On the other hand, the hit probability decreased monotonically with increase in the source-target distance, and fell to zero when the source-target distance was larger than the particle range in air.
Collapse
Affiliation(s)
- Dragoslav Nikezic
- Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
- Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - Kwan Ngok Yu
- Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
- State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon Tong, Hong Kong
| |
Collapse
|
32
|
Sato D, Shiba T, Mizuno S, Kawamura A, Hanada S, Yamada T, Shinozaki M, Yanagitani M, Tamura T, Inagaki K, Harada S. The hyperthermophilic cystathionine γ-synthase from the aerobic crenarchaeon Sulfolobus tokodaii: expression, purification, crystallization and structural insights. Acta Crystallogr F Struct Biol Commun 2017; 73:152-158. [PMID: 28291751 PMCID: PMC5349309 DOI: 10.1107/s2053230x17002011] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 02/07/2017] [Indexed: 11/10/2022] Open
Abstract
Cystathionine γ-synthase (CGS; EC 2.5.1.48), a pyridoxal 5'-phosphate (PLP)-dependent enzyme, catalyzes the formation of cystathionine from an L-homoserine derivative and L-cysteine in the first step of the transsulfuration pathway. Recombinant CGS from the thermoacidophilic archaeon Sulfolobus tokodaii (StCGS) was overexpressed in Escherichia coli and purified to homogeneity by heat treatment followed by hydroxyapatite and gel-filtration column chromatography. The purified enzyme shows higher enzymatic activity at 353 K under basic pH conditions compared with that at 293 K. Crystallization trials yielded three crystal forms from different temperature and pH conditions. Form I crystals (space group P21; unit-cell parameters a = 58.4, b = 149.3, c = 90.2 Å, β = 108.9°) were obtained at 293 K under acidic pH conditions using 2-methyl-2,4-pentanediol as a precipitant, whereas under basic pH conditions the enzyme crystallized in form II at 293 K (space group C2221; unit-cell parameters a = 117.7, b = 117.8, c = 251.3 Å) and in form II' at 313 K (space group C2221; unit-cell parameters a = 107.5, b = 127.7, c = 251.1 Å) using polyethylene glycol 3350 as a precipitant. X-ray diffraction data were collected to 2.2, 2.9 and 2.7 Å resolution for forms I, II and II', respectively. Structural analysis of these crystal forms shows that the orientation of the bound PLP in form II is significantly different from that in form II', suggesting that the change in orientation of PLP with temperature plays a role in the thermophilic enzymatic activity of StCGS.
Collapse
Affiliation(s)
- Dan Sato
- Department of Applied Biology, Kyoto Institute of Technology, Gosho Kaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tomoo Shiba
- Department of Applied Biology, Kyoto Institute of Technology, Gosho Kaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Sae Mizuno
- Department of Applied Biology, Kyoto Institute of Technology, Gosho Kaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Ayaka Kawamura
- Department of Applied Biology, Kyoto Institute of Technology, Gosho Kaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shoko Hanada
- Department of Applied Biology, Kyoto Institute of Technology, Gosho Kaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tetsuya Yamada
- Department of Biofunctional Chemistry, Okayama University, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan
| | - Mai Shinozaki
- Department of Biofunctional Chemistry, Okayama University, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan
| | - Masahiko Yanagitani
- Department of Biofunctional Chemistry, Okayama University, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan
| | - Takashi Tamura
- Department of Biofunctional Chemistry, Okayama University, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan
| | - Kenji Inagaki
- Department of Biofunctional Chemistry, Okayama University, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan
| | - Shigeharu Harada
- Department of Applied Biology, Kyoto Institute of Technology, Gosho Kaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| |
Collapse
|
33
|
Abstract
When investigating a new catalytic reaction, scientists may wonder if the crude reaction product can be easily separated and purified. We present here a new concept-distillation resistance-to assess the potential of distillation as a purification technique and to guide catalyst formulation or operation at the very early stage of the research. Distillation resistance, which has been developed from the analysis of 15 industrial distillation trains, can be quickly calculated with knowledge of only the product composition and atmospheric boiling points of the components. It can be directly converted into a preliminary distillation cost that considers investment and energy cost. Its application and its potential guidance in catalysis research are illustrated through a few cases studies derived from biorefinery processes.
Collapse
Affiliation(s)
- Jean-Paul Lange
- Shell Global Solutions International B.V., Shell Technology Centre Amsterdam, Grasweg 31, 1031 HW, Amsterdam, The Netherlands
- Sustainable Process Technology Group, Faculty of Science and Technology, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands
| |
Collapse
|
34
|
Amarasekara H, Crich D. Synthesis and intramolecular glycosylation of sialyl mono-esters of o-xylylene glycol. The importance of donor configuration and nitrogen protecting groups on cyclization yield and selectivity; isolation and characterization of a N-sialyl acetamide indicative of participation by acetonitrile. Carbohydr Res 2016; 435:113-120. [PMID: 27744142 PMCID: PMC5110385 DOI: 10.1016/j.carres.2016.09.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 09/21/2016] [Accepted: 09/23/2016] [Indexed: 10/20/2022]
Abstract
The synthesis and cyclization reactions, leading to spirocyclic medium ring-sized diolides, of o-(hydroxymethyl)xylylene monoesters of sialyl thioglycosides is described. Cyclization yields and stereoselectivities are found to vary as a function of the anomeric stereochemistry of the thioglycoside and of the N5 protecting group, and these effects are discussed in terms of the reaction mechanism. Cyclization in the presence of acetonitrile results in the isolation and characterization of a Ritter-type N-sialyl acetamide, which affords strong evidence for the participation of acetonitrile in the form of sialyl nitrilium ions.
Collapse
Affiliation(s)
| | - David Crich
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
| |
Collapse
|
35
|
Rivas D, Ginebreda A, Pérez S, Quero C, Barceló D. MALDI-TOF MS Imaging evidences spatial differences in the degradation of solid polycaprolactone diol in water under aerobic and denitrifying conditions. Sci Total Environ 2016; 566-567:27-33. [PMID: 27213667 DOI: 10.1016/j.scitotenv.2016.05.090] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 03/02/2016] [Revised: 05/13/2016] [Accepted: 05/13/2016] [Indexed: 04/14/2023]
Abstract
Degradation of solid polymers in the aquatic environment encompasses a variety of biotic and abiotic processes giving rise to heterogeneous patterns across the surface of the material, which cannot be investigated using conventional Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) that only renders an "average" picture of the sample. In that context, MALDI-TOF MS Imaging (MALDI MSI) provides a rapid and efficient tool to study 2D spatial changes occurred in the chemical composition of the polymer surface. Commercial polycaprolactone diol (average molecular weight of 1250Da) was selected as test material because it had been previously known to be amenable to biological degradation. The test oligomer probe was incubated under aerobic and denitrifying conditions using synthetic water and denitrifying mixed liquor obtained from a wastewater treatment plant respectively. After ca. seven days of exposure the mass spectra obtained by MALDI MSI showed the occurrence of chemical modifications in the sample surface. Observed heterogeneity across the probe's surface indicated significant degradation and suggested the contribution of biotic processes. The results were investigated using different image processing tools. Major changes on the oligomer surface were observed when exposed to denitrifying conditions.
Collapse
Affiliation(s)
- Daniel Rivas
- IDAEA-CSIC, Institute of Environmental Assessment and Water Research, C/Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Antoni Ginebreda
- IDAEA-CSIC, Institute of Environmental Assessment and Water Research, C/Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Sandra Pérez
- IDAEA-CSIC, Institute of Environmental Assessment and Water Research, C/Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Carmen Quero
- IQAC-CSIC, Institute of Advanced Chemistry of Catalonia, C/Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Damià Barceló
- IDAEA-CSIC, Institute of Environmental Assessment and Water Research, C/Jordi Girona, 18-26, 08034 Barcelona, Spain; ICRA, Catalan Institute for Water Research, Scientific and Technologic Park of the UdG, Emili Grahit, 101-17003 Girona, Spain
| |
Collapse
|
36
|
Yan T, Barta K. Sustainable Pathways to Pyrroles through Iron-Catalyzed N-Heterocyclization from Unsaturated Diols and Primary Amines. ChemSusChem 2016; 9:2321-2325. [PMID: 27493031 DOI: 10.1002/cssc.201600607] [Citation(s) in RCA: 44] [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: 05/06/2016] [Revised: 06/29/2016] [Indexed: 06/06/2023]
Abstract
Pyrroles are prominent scaffolds in pharmaceutically active compounds and play an important role in medicinal chemistry. Therefore, the development of new, atom-economic, and sustainable catalytic strategies to obtain these moieties is highly desired. Direct catalytic pathways that utilize readily available alcohol substrates have been recently established; however, these approaches rely on the use of noble metals such as ruthenium or iridium. Here, we report on the direct synthesis of pyrroles using a catalyst based on the earth-abundant and inexpensive iron. The method uses 2-butyne-1,4-diol or 2-butene-1,4-diol that can be directly coupled with anilines, benzyl amines, and aliphatic amines to obtain a variety of N-substituted pyrroles in moderate-to-excellent isolated yields.
Collapse
Affiliation(s)
- Tao Yan
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands
| | - Katalin Barta
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands.
| |
Collapse
|
37
|
Olšovcová V, Versaci R, Ambrožová I, Zelenka Z, Kaufman J, Margarone D, Kim IJ, Jeong TM. RESPONSE OF DOSEMETERS IN FIELDS GENERATED BY LASER-ACCELERATED PROTONS. Radiat Prot Dosimetry 2016; 170:318-321. [PMID: 26979806 DOI: 10.1093/rpd/ncw037] [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: 06/05/2023]
Abstract
In laser-driven acceleration, ultra-short and intense laser pulses are focussed on targets to generate beams of ionising radiation. One of the most important issues to be addressed is personal monitoring. While traditional dosemeters were designed primarily for measurements in continuous fields, dosemeters for laser laboratories must be capable of working in pulsed fields of pulse length below 1 ps, in a single-shot regime up to the repetition rate of 1 kHz. Responses of conventional dosemeters (films, polyallyldiglycol carbonate, electronic personal dosemeter) to proton bunches of up to 30 MeV energy produced by South Korean PW laser system at the Advanced Photonics Research Institute, Gwangju Institute of Science and Technology were studied, both by means of Monte Carlo simulations and experimentally.
Collapse
Affiliation(s)
- V Olšovcová
- ELI Beamlines, Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, Prague 8, Czech Republic
| | - R Versaci
- ELI Beamlines, Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, Prague 8, Czech Republic
| | - I Ambrožová
- Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež 130, Czech Republic
| | - Z Zelenka
- National Personal Dosimetry Service, Na Truhlářce 39/64, Prague 8, Czech Republic
| | - J Kaufman
- ELI Beamlines, Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, Prague 8, Czech Republic
| | - D Margarone
- ELI Beamlines, Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, Prague 8, Czech Republic
| | - I J Kim
- Advanced Photonics Research Institute, GIST, Gwangiu 500-712, Korea Present address: Optical Instrumentation Development Team, KBSI, Daejeon 34133, Korea
| | - T M Jeong
- Advanced Photonics Research Institute, GIST, Gwangiu 500-712, Korea ELI Beamlines, Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, Prague 8, Czech Republic
| |
Collapse
|
38
|
Assenmacher F, Boschung M, Hohmann E, Mayer S. COMPARISON OF DIFFERENT PADC MATERIALS AND ETCHING CONDITIONS FOR FAST NEUTRON DOSIMETRY. Radiat Prot Dosimetry 2016; 170:162-167. [PMID: 26443546 DOI: 10.1093/rpd/ncv421] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Etched-track polyallyl diglycol carbonate (PADC) dosemeters have been in use at the Paul Scherrer Institute since 1998 in neutron dosimetry for individual monitoring. In the last years, the availability of PADC materials from different manufacturers has grown, and different etching conditions were proposed, with the intention to improve the quality and overall performance of PADC in individual neutron monitoring. The goal of the present study was to compare the performance of different PADC materials and to investigate the influence of different etching conditions on sensitivity to fast neutrons and lower detection limit. The comparison covers six different PADC materials and eight different etching conditions.
Collapse
Affiliation(s)
- F Assenmacher
- Division for Radiation Safety and Security, Paul Scherrer Institute (PSI), CH-5232 Villigen PSI, Switzerland
| | - M Boschung
- Division for Radiation Safety and Security, Paul Scherrer Institute (PSI), CH-5232 Villigen PSI, Switzerland
| | - E Hohmann
- Division for Radiation Safety and Security, Paul Scherrer Institute (PSI), CH-5232 Villigen PSI, Switzerland
| | - S Mayer
- Division for Radiation Safety and Security, Paul Scherrer Institute (PSI), CH-5232 Villigen PSI, Switzerland
| |
Collapse
|
39
|
Mayer S, Boschung M, Butterweck G, Assenmacher F, Hohmann E. STABILITY OF THE NEUTRON DOSE DETERMINATION ALGORITHM FOR PERSONAL NEUTRON DOSEMETERS AT DIFFERENT RADON GAS EXPOSURES. Radiat Prot Dosimetry 2016; 170:154-157. [PMID: 26396265 DOI: 10.1093/rpd/ncv408] [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: 06/05/2023]
Abstract
Since 2008 the Paul Scherrer Institute (PSI) has been using a microscope-based automatic scanning system for assessing personal neutron doses with a dosemeter based on PADC. This scanning system, known as TASLImage, includes a comprehensive characterisation of tracks. The distributions of several specific track characteristics such as size, shape and optical density are compared with a reference set to discriminate tracks of alpha particles and non-track background. Due to the dosemeter design at PSI, it is anticipated that radon should not significantly contribute to the creation of additional tracks in the PADC detector. The present study tests the stability of the neutron dose determination algorithm of the personal neutron dosemeter system in operation at PSI at different radon gas exposures.
Collapse
Affiliation(s)
- Sabine Mayer
- Paul Scherrer Institute, Division for Radiation Safety and Security, Villigen PSI, Switzerland
| | - Markus Boschung
- Paul Scherrer Institute, Division for Radiation Safety and Security, Villigen PSI, Switzerland
| | - Gernot Butterweck
- Paul Scherrer Institute, Division for Radiation Safety and Security, Villigen PSI, Switzerland
| | - Frank Assenmacher
- Paul Scherrer Institute, Division for Radiation Safety and Security, Villigen PSI, Switzerland
| | - Eike Hohmann
- Paul Scherrer Institute, Division for Radiation Safety and Security, Villigen PSI, Switzerland
| |
Collapse
|
40
|
Omoruyi U, Page S, Hallett J, Miller PW. Homogeneous Catalyzed Reactions of Levulinic Acid: To γ-Valerolactone and Beyond. ChemSusChem 2016; 9:2037-2047. [PMID: 27464831 DOI: 10.1002/cssc.201600517] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [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: 04/20/2016] [Revised: 05/31/2016] [Indexed: 06/06/2023]
Abstract
Platform chemicals derived from lignocellulosic plant biomass are viewed as a sustainable replacement for crude oil-based feedstocks. Levulinic acid (LA) is one such biomass-derived chemical that has been widely studied for further catalytic transformation to γ-valerolactone (GVL), an important 'green' fuel additive, solvent, and fine chemical intermediate. Although the transformation of LA to GVL can be achieved using heterogeneous catalysis, homogeneous catalytic systems that operate under milder reactions, give higher selectivities and can be recycled continuously are attracting considerable attention. A range of new homogeneous catalysts have now been demonstrated to efficiently convert LA to GVL and to transform LA directly to other value-added chemicals such as 1,4-pentanediol (1,4-PDO) and 2-methyltetrahydrofuran (2-MTHF). This Minireview covers recent advances in the area of homogeneous catalysis for the conversion of levulinic acid and levulinic ester derivatives to GVL and chemicals beyond GVL.
Collapse
Affiliation(s)
- Uwaila Omoruyi
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK
| | - Samuel Page
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK
| | - Jason Hallett
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2AZ, UK
| | - Philip W Miller
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
| |
Collapse
|
41
|
Black R, Shyamsunder A, Adeli P, Kundu D, Murphy GK, Nazar LF. The Nature and Impact of Side Reactions in Glyme-based Sodium-Oxygen Batteries. ChemSusChem 2016; 9:1795-1803. [PMID: 27265118 DOI: 10.1002/cssc.201600034] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [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: 01/10/2016] [Revised: 03/15/2016] [Indexed: 06/05/2023]
Abstract
Although Na-O2 batteries have a low overpotential and good capacity retention, degradation reactions of glyme-based electrolytes are the primary reason for inefficiency in cell performance. The discharge capacity is accounted for through analysis of the side-products. Although sodium superoxide is the primary product (90 % theoretical), quantitative and qualitative evaluation of the side-products (using (1) H NMR, iodometric titration, and on-line mass spectrometry) shows the presence of sodium acetate (∼3.5 %), and three-fold less sodium formate, methoxy (oxo)acetic anhydride, and sodium carbonate. Our reaction mechanism proposes two paths for their formation. Because the side-products are not fully removed during oxidation, they accumulate on the cathode upon cycling. Resting the cell at open circuit potential during discharge results in consumption of the superoxide through the reaction with diglyme, which greatly increases the fraction of side products, as also confirmed by ex situ reaction studies. These findings have implications in the search for more stable electrolytes.
Collapse
Affiliation(s)
- Robert Black
- Department of Chemistry and the Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Abhinandan Shyamsunder
- Department of Chemistry and the Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Parvin Adeli
- Department of Chemistry and the Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Dipan Kundu
- Department of Chemistry and the Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Graham K Murphy
- Department of Chemistry and the Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Linda F Nazar
- Department of Chemistry and the Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
| |
Collapse
|
42
|
Fang L, Yan L, Haeffner F, Morken JP. Carbohydrate-Catalyzed Enantioselective Alkene Diboration: Enhanced Reactivity of 1,2-Bonded Diboron Complexes. J Am Chem Soc 2016; 138:2508-11. [PMID: 26854364 PMCID: PMC4896641 DOI: 10.1021/jacs.5b13174] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [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: 11/28/2022]
Abstract
Catalytic enantioselective diboration of alkenes is accomplished with readily available carbohydrate-derived catalysts. Mechanistic experiments suggest the intermediacy of 1,2-bonded diboronates.
Collapse
Affiliation(s)
- Lichao Fang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Lu Yan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Fredrik Haeffner
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - James P. Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| |
Collapse
|
43
|
Barba-Bon A, Martínez-Máñez R, Sancenón F, Costero AM, Gil S, Pérez-Pla F, Llopis E. Towards the design of organocatalysts for nerve agents remediation: The case of the active hydrolysis of DCNP (a Tabun mimic) catalyzed by simple amine-containing derivatives. J Hazard Mater 2015; 298:73-82. [PMID: 26005922 DOI: 10.1016/j.jhazmat.2015.04.083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 03/30/2015] [Accepted: 04/12/2015] [Indexed: 06/04/2023]
Abstract
We report herein a study of the hydrolysis of Tabun mimic DCNP in the presence of different amines, aminoalcohols and glycols as potential suitable organocatalysts for DCNP degradation. Experiments were performed in CD3CN in the presence of 5% D2O, which is a suitable solvent mixture to follow the DCNP hydrolysis. These studies allowed the definition of different DCNP depletion paths, resulting in the formation of diethylphosphoric acid, tetraethylpyrophosphate and phosphoramide species as final products. Without organocatalysts, DCNP hydrolysis occurred mainly via an autocatalysis path. Addition of tertiary amines in sub-stoichiometric amounts largely enhanced DCNP depletion whereas non-tertiary polyamines reacted even faster. Glycols induced very slight increment in the DCNP hydrolysis, whereas DCNP hydrolysis increased sharply in the presence of certain aminoalcohols especially, 2-(2-aminoethylamino)ethanol. For the latter compound, DCNP depletion occurred ca. 80-fold faster than in the absence of organocatalysts. The kinetic studies revealed that DCNP hydrolysis in the presence of 2-(2-aminoethylamino)ethanol occurred via a catalytic process, in which the aminoalcohol was involved. DCNP hydrolysis generally depended strongly on the structure of the amine, and it was found that the presence of the OHCH2CH2N moiety in the organocatalyst structure seems important to induce a fast degradation of DCNP.
Collapse
Affiliation(s)
- Andrea Barba-Bon
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BNN), Spain
| | - Ramón Martínez-Máñez
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BNN), Spain
| | - Félix Sancenón
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BNN), Spain
| | - Ana M Costero
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química Orgánica, Universitat de València, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain.
| | - Salvador Gil
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química Orgánica, Universitat de València, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain
| | - Francisco Pérez-Pla
- Institut de Cíencia dels Materials (ICMUV), c/ Catedrtico Beltrán 2, 46980 Valencia, Spain.
| | - Elisa Llopis
- Institut de Cíencia dels Materials (ICMUV), c/ Catedrtico Beltrán 2, 46980 Valencia, Spain
| |
Collapse
|
44
|
Ray AM, Millar JG, Moreira JA, McElfresh JS, Mitchell RF, Barbour JD, Hanks LM. North American Species of Cerambycid Beetles in the Genus Neoclytus Share a Common Hydroxyhexanone-Hexanediol Pheromone Structural Motif. J Econ Entomol 2015; 108:1860-8. [PMID: 26470328 PMCID: PMC6281368 DOI: 10.1093/jee/tov170] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 06/01/2015] [Indexed: 05/23/2023]
Abstract
Many species of cerambycid beetles in the subfamily Cerambycinae are known to use male-produced pheromones composed of one or a few components such as 3-hydroxyalkan-2-ones and the related 2,3-alkanediols. Here, we show that this pheromone structure is characteristic of the cerambycine genus Neoclytus Thomson, based on laboratory and field studies of 10 species and subspecies. Males of seven taxa produced pheromones composed of (R)-3-hydroxyhexan-2-one as a single component, and the synthetic pheromone attracted adults of both sexes in field bioassays, including the eastern North American taxa Neoclytus caprea (Say), Neoclytus mucronatus mucronatus (F.), and Neoclytus scutellaris (Olivier), and the western taxa Neoclytus conjunctus (LeConte), Neoclytus irroratus (LeConte), and Neoclytus modestus modestus Fall. Males of the eastern Neoclytus acuminatus acuminatus (F.) and the western Neoclytus tenuiscriptus Fall produced (2S,3S)-2,3-hexanediol as their dominant or sole pheromone component. Preliminary data also revealed that males of the western Neoclytus balteatus LeConte produced a blend of (R)-3-hydroxyhexan-2-one and (2S,3S)-2,3-hexanediol but also (2S,3S)-2,3-octanediol as a minor component. The fact that the hydroxyketone-hexanediol structural motif is consistent among these North American species provides further evidence of the high degree of conservation of pheromone structures among species in the subfamily Cerambycinae.
Collapse
Affiliation(s)
- Ann M Ray
- Department of Biology, Xavier University, Cincinnati, OH 45207.
| | - Jocelyn G Millar
- Department of Entomology, University of California, Riverside, CA 92521
| | - Jardel A Moreira
- Department of Entomology, University of California, Riverside, CA 92521
| | | | - Robert F Mitchell
- Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801. Present address: Center for Insect Science and Department of Neuroscience, University of Arizona, Tucson AZ 85721
| | - James D Barbour
- University of Idaho Parma Research and Extension Center, Parma, ID 83660
| | - Lawrence M Hanks
- Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| |
Collapse
|
45
|
Tuteja J, Nishimura S, Choudhary H, Ebitani K. Selective Oxidation of 1,6-Hexanediol to 6-Hydroxycaproic Acid over Reusable Hydrotalcite-Supported Au-Pd Bimetallic Catalysts. ChemSusChem 2015; 8:1862-1866. [PMID: 25990616 DOI: 10.1002/cssc.201500255] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 02/17/2015] [Revised: 03/25/2015] [Indexed: 06/04/2023]
Abstract
Selective oxidation of 1,6-hexanediol into 6-hydroxycaproic acid was achieved over hydrotalcite-supported Au-Pd bimetallic nanoparticles as heterogeneous catalyst using aqueous H2 O2 . N,N-dimethyldodecylamine N-oxide (DDAO) was used as an efficient capping agent. Spectroscopic analyses by UV/Vis, TEM, XPS, and X-ray absorption spectroscopy suggested that interactions between gold and palladium atoms are responsible for the high activity of the reusable Au40 Pd60 -DDAO/HT catalyst.
Collapse
Affiliation(s)
- Jaya Tuteja
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292 (Japan), Fax: (+81) 761-51-1149
| | - Shun Nishimura
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292 (Japan), Fax: (+81) 761-51-1149
| | - Hemant Choudhary
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292 (Japan), Fax: (+81) 761-51-1149
| | - Kohki Ebitani
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292 (Japan), Fax: (+81) 761-51-1149.
| |
Collapse
|
46
|
Stauber M, Jakoncic J, Berger J, Karp JM, Axelbaum A, Sastow D, Buldyrev SV, Hrnjez BJ, Asherie N. Crystallization of lysozyme with (R)-, (S)- and (RS)-2-methyl-2,4-pentanediol. Acta Crystallogr D Biol Crystallogr 2015; 71:427-41. [PMID: 25760593 PMCID: PMC4356360 DOI: 10.1107/s1399004714025061] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 11/15/2014] [Indexed: 11/10/2022]
Abstract
Chiral control of crystallization has ample precedent in the small-molecule world, but relatively little is known about the role of chirality in protein crystallization. In this study, lysozyme was crystallized in the presence of the chiral additive 2-methyl-2,4-pentanediol (MPD) separately using the R and S enantiomers as well as with a racemic RS mixture. Crystals grown with (R)-MPD had the most order and produced the highest resolution protein structures. This result is consistent with the observation that in the crystals grown with (R)-MPD and (RS)-MPD the crystal contacts are made by (R)-MPD, demonstrating that there is preferential interaction between lysozyme and this enantiomer. These findings suggest that chiral interactions are important in protein crystallization.
Collapse
Affiliation(s)
- Mark Stauber
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Jean Jakoncic
- National Synchrotron Light Source, Brookhaven National Laboratory, Building 725D, Upton, NY 11973-5000, USA
| | - Jacob Berger
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Jerome M. Karp
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Ariel Axelbaum
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Dahniel Sastow
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Sergey V. Buldyrev
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Bruce J. Hrnjez
- Collegiate School, 260 West 78th Street, New York, NY 10024-6559, USA
| | - Neer Asherie
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| |
Collapse
|
47
|
Abstract
The substitution of platform chemicals of fossil origin by biomass-derived analogues requires the development of chemical transformations capable of reducing the very high oxygen content of biomass. One such reaction, which has received increasing attention within the past five years, is the rhenium-catalyzed deoxydehydration (DODH) of a vicinal diol into an alkene; this is a model system for abundant polyols like glycerol and sugar alcohols. The present contribution includes a review of early investigations of stoichiometric reactions involving rhenium, diols, and alkenes followed by a discussion of the various catalytic systems that have been developed with emphasis on the nature of the reductant, the substrate scope, and mechanistic investigations.
Collapse
Affiliation(s)
- Johannes R Dethlefsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby (Denmark)
| | | |
Collapse
|
48
|
Wei M, Zhan M, Yu D, Xie H, He M, Yang K, Wang Y. Novel poly(tetramethylene ether)glycol and poly(ε-caprolactone) based dynamic network via quadruple hydrogen bonding with triple-shape effect and self-healing capacity. ACS Appl Mater Interfaces 2015; 7:2585-2596. [PMID: 25558885 DOI: 10.1021/am507575z] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [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: 06/04/2023]
Abstract
A novel dynamic network was successfully prepared via self-complementary quadruple hydrogen bonding through Upy-telechelic poly(tetremethylene ether) glycol (PTMEG) and four-arm star-shaped poly(ε-caprolactone) ((4)PCL) precursors. The structure and the dynamic feature were identified by FT-IR and (1)H NMR. The differential scanning calorimetry (DSC) analysis indicated that the crystalline PCL and PTMEG segments show a separated melting peak, and the aggregation of Upy dimer was also observed. The dynamic mechanical analyzer (DMA) test reveals that the storage modulus of the network drops evidently across the thermal transition. These characteristics of the network ensure that it exhibits a triple-shape effect, and the composition of the network influences the performance of shape memory effect. The variation of the fixing ratio of the network in each deformation step is quite according to the crystallinity of the dominant segment. The reversibility of the quadruple hydrogen bonding between Upy dimer endues the network with self-healing capacity, and the damage and healing test of the network revealed that increasing the content of the PTMEG segment will be of benefit to self-healing performance.
Collapse
Affiliation(s)
- Min Wei
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610064, China
| | | | | | | | | | | | | |
Collapse
|
49
|
Li Q, Liu Z. Preparation and characterization of fluorophenylboronic acid-functionalized affinity monolithic columns for the selective enrichment of cis-diol-containing biomolecules. Methods Mol Biol 2015; 1286:159-169. [PMID: 25749953 DOI: 10.1007/978-1-4939-2447-9_13] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Boronate affinity monolithic columns have been developed into an important means for the selective recognition and capture of cis-diol-containing biomolecules, such as glycoproteins, nucleosides and saccharides. The ligands of boronic acids are playing an important role in boronate affinity monolithic columns. Although several boronate affinity monoliths with high affinity toward cis-diol-containing biomolecules have been reported, only few publications are focused on their detailed procedures for preparation and characterization. This chapter describes in detail the preparation and characterization of a boronate affinity monolithic column applying 2,4-difluoro-3-formyl-phenylboronic acid (DFFPBA) as a ligand. The DFFPBA-functionalized monolithic column not only exhibited an ultrahigh boronate affinity toward cis-diol-containing biomolecules, but also showed great potential for the selective enrichment of cis-diol-containing biomolecules in real samples.
Collapse
Affiliation(s)
- Qianjin Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | | |
Collapse
|
50
|
Wu J, Eduard P, Thiyagarajan S, Noordover BAJ, van Es DS, Koning CE. Semi-aromatic polyesters based on a carbohydrate-derived rigid diol for engineering plastics. ChemSusChem 2015; 8:67-72. [PMID: 25382180 DOI: 10.1002/cssc.201402935] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 09/01/2014] [Indexed: 06/04/2023]
Abstract
New carbohydrate-based polyesters were prepared from isoidide-2,5-dimethanol (extended isoidide, XII) through melt polymerization with dimethyl esters of terephthalic acid (TA) and furan-2,5-dicarboxylic acid (FDCA), yielding semi-crystalline prepolymers. Subsequent solid-state post-condensation (SSPC) gave high molecular weight (Mn =30 kg mol(-1) for FDCA) materials, the first examples of high Mn , semi-aromatic homopolyesters containing isohexide derivatives obtained via industrially relevant procedures. NMR spectroscopy showed that the stereo-configuration of XII was preserved under the applied conditions. The polyesters are thermally stable up to 380 °C. The TA- and FDCA-based polyesters have high Tg (105 °C and 94 °C, resp.) and Tm (284 °C and 250 °C, resp.) values. Its reactivity, stability, and ability to afford high Tg and Tm polyesters make XII a promising diol for the synthesis of engineering polymers.
Collapse
Affiliation(s)
- Jing Wu
- Food and Biobased Research, Wageningen University and Research Center, Bornse Weilanden 9, 6708 WG, Wageningen (The Netherlands); Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5600 MB, Eindhoven (The Netherlands); Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX, Eindhoven (The Netherlands)
| | | | | | | | | | | |
Collapse
|