1
|
Jang MG, Yoon S, Shin D, Kim HJ, Huang R, Yang E, Kim J, Lee KS, An K, Han JW. Boosting Support Reducibility and Metal Dispersion by Exposed Surface Atom Control for Highly Active Supported Metal Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00476] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Myeong Gon Jang
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Sinmyung Yoon
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Dongjae Shin
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Hyung Jun Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Rui Huang
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Euiseob Yang
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jihun Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Kug-Seung Lee
- Beamline Division, Pohang Accelerator Laboratory (PAL), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Kwangjin An
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| |
Collapse
|
2
|
Emambocus S, Rhyman L, Ramasami P. Theoretical Study of the Microhydration the Chemical Warfare Agent Sulfur Mustard. ACS OMEGA 2020; 5:1822-1831. [PMID: 32039318 PMCID: PMC7003240 DOI: 10.1021/acsomega.9b03061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
A microhydration study of sulfur mustard (SM) was carried out using M06-2X, B3LYP, B3LYP-D3, and MP2 levels of theory with the 6-311++G(2d,2p) basis set. The changes in energetics, structural parameters and vibrational wavenumbers following the addition of up to three discrete water molecules to SM were analyzed. We observed slight changes in the geometry of SM upon microhydration. The stability of hydrated clusters is due to weak C-H···O-H hydrogen bonds. The free energy change for the formation of the clusters is positive at room temperature and becomes exergonic when the temperature decreases. The infrared stretchings of C-Cl of SM and O-H of water are redshifted upon the addition of water molecules. The findings from this work add to the literature of hydrated SM and can be useful in its detection and subsequent destruction.
Collapse
Affiliation(s)
- Shëyhaane
A. Emambocus
- Computational
Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit 80837, Mauritius
| | - Lydia Rhyman
- Computational
Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit 80837, Mauritius
- Department
of Chemical Sciences, University of Johannesburg, PO Box 17011, Doornfontein, Johannesburg 2028, South Africa
| | - Ponnadurai Ramasami
- Computational
Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit 80837, Mauritius
- Department
of Chemical Sciences, University of Johannesburg, PO Box 17011, Doornfontein, Johannesburg 2028, South Africa
| |
Collapse
|
3
|
Sinha S, Bhattacharyya PK. Understanding the influence of external perturbation on aziridinium ion formation. Mol Phys 2018. [DOI: 10.1080/00268976.2017.1363922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Sourab Sinha
- Department of Chemistry, Arya Vidyapeeth College, Guwahati, India
| | | |
Collapse
|
4
|
Larrañaga O, de Cózar A, Cossío FP. Mono- and Di-Alkylation Processes of DNA Bases by Nitrogen Mustard Mechlorethamine. Chemphyschem 2017; 18:3390-3401. [DOI: 10.1002/cphc.201700937] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Olatz Larrañaga
- Departamento de Química Orgánica I/ Kimika Organikoa I Saila; Facultad de Química/ Kimika Fakultatea; Universidad del País Vasco, Euskal Herriko Unibertsitatea UPV/EHU and Donostia International Physics Center (DIPC) and Centro de Innovación en Química Avanzada (ORFEO-CINQA); P. K. 1072 20018 San Sebastián-Donostia Spain
| | - Abel de Cózar
- Departamento de Química Orgánica I/ Kimika Organikoa I Saila; Facultad de Química/ Kimika Fakultatea; Universidad del País Vasco, Euskal Herriko Unibertsitatea UPV/EHU and Donostia International Physics Center (DIPC) and Centro de Innovación en Química Avanzada (ORFEO-CINQA); P. K. 1072 20018 San Sebastián-Donostia Spain
- IKERBASQUE; Basque Foundation for Science; 48011 Bilbao Spain
| | - Fernando P. Cossío
- Departamento de Química Orgánica I/ Kimika Organikoa I Saila; Facultad de Química/ Kimika Fakultatea; Universidad del País Vasco, Euskal Herriko Unibertsitatea UPV/EHU and Donostia International Physics Center (DIPC) and Centro de Innovación en Química Avanzada (ORFEO-CINQA); P. K. 1072 20018 San Sebastián-Donostia Spain
| |
Collapse
|
5
|
Shariatinia Z, Dusek M, Eigner V. Synthesis, X-ray Crystallography, and DFT Calculations of A Novel Phosphoramide. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400285] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
6
|
Inturi S, Tewari-Singh N, Agarwal C, White CW, Agarwal R. Activation of DNA damage repair pathways in response to nitrogen mustard-induced DNA damage and toxicity in skin keratinocytes. Mutat Res 2014; 763-764:53-63. [PMID: 24732344 DOI: 10.1016/j.mrfmmm.2014.04.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 03/18/2014] [Accepted: 04/03/2014] [Indexed: 01/24/2023]
Abstract
Nitrogen mustard (NM), a structural analog of chemical warfare agent sulfur mustard (SM), forms adducts and crosslinks with DNA, RNA and proteins. Here we studied the mechanism of NM-induced skin toxicity in response to double strand breaks (DSBs) resulting in cell cycle arrest to facilitate DNA repair, as a model for developing countermeasures against vesicant-induced skin injuries. NM exposure of mouse epidermal JB6 cells decreased cell growth and caused S-phase arrest. Consistent with these biological outcomes, NM exposure also increased comet tail extent moment and the levels of DNA DSB repair molecules phospho H2A.X Ser139 and p53 Ser15 indicating NM-induced DNA DSBs. Since DNA DSB repair occurs via non homologous end joining pathway (NHEJ) or homologous recombination repair (HRR) pathways, next we studied these two pathways and noted their activation as defined by an increase in phospho- and total DNA-PK levels, and the formation of Rad51 foci, respectively. To further analyze the role of these pathways in the cellular response to NM-induced cytotoxicity, NHEJ and HRR were inhibited by DNA-PK inhibitor NU7026 and Rad51 inhibitor BO2, respectively. Inhibition of NHEJ did not sensitize cells to NM-induced decrease in cell growth and cell cycle arrest. However, inhibition of the HRR pathway caused a significant increase in cell death, and prolonged G2M arrest following NM exposure. Together, our findings, indicating that HRR is the key pathway involved in the repair of NM-induced DNA DSBs, could be useful in developing new therapeutic strategies against vesicant-induced skin injury.
Collapse
Affiliation(s)
- Swetha Inturi
- Department of Pharmaceutical Sciences, University of Colorado Anchutz Medical Campus, Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO 80045, USA
| | - Neera Tewari-Singh
- Department of Pharmaceutical Sciences, University of Colorado Anchutz Medical Campus, Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO 80045, USA
| | - Chapla Agarwal
- Department of Pharmaceutical Sciences, University of Colorado Anchutz Medical Campus, Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO 80045, USA
| | - Carl W White
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Rajesh Agarwal
- Department of Pharmaceutical Sciences, University of Colorado Anchutz Medical Campus, Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO 80045, USA.
| |
Collapse
|
7
|
Sinha S, Bhattacharyya PK. Alkylation of guanine by formononetin nitrogen mustard derivatives: A DFT study. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2013.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
8
|
|
9
|
Thompson VR, DeCaprio AP. Covalent Adduction of Nitrogen Mustards to Model Protein Nucleophiles. Chem Res Toxicol 2013; 26:1263-71. [DOI: 10.1021/tx400188w] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Vanessa R. Thompson
- Department of Chemistry
and Biochemistry and International
Forensic Research Institute, Florida International University, Miami, Florida 33199, United States
| | - Anthony P. DeCaprio
- Department of Chemistry
and Biochemistry and International
Forensic Research Institute, Florida International University, Miami, Florida 33199, United States
| |
Collapse
|
10
|
Polavarapu A, Stillabower JA, Stubblefield SGW, Taylor WM, Baik MH. The mechanism of guanine alkylation by nitrogen mustards: a computational study. J Org Chem 2012; 77:5914-21. [PMID: 22681226 DOI: 10.1021/jo300351g] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The thermodynamics and kinetics for the monofunctional binding of nitrogen mustard class of anticancer drugs to purine bases of DNA were studied computationally using guanine and adenine as model substrates. Mechlorethamine and melphalan are used as model systems in order to better understand the difference in antitumor activity of aliphatic and aromatic mustards, respectively. In good agreement with experiments that suggested the accumulation of a reactive intermediate in the case of mechlorethamine, our model predicts a significant preference for the formation of corresponding aziridinium ion for mechlorethamine, while the formation of the aziridinium ion is not computed to be preferred when melphalan is used. Two effects are found that contribute to this difference. First, the ground state of the drug shows a highly delocalized lone pair on the amine nitrogen of the melphalan, which makes the subsequent cyclization more difficult. Second, because of the aromatic substituent connected to the amine nitrogen of melphalan, a large energy penalty has to be paid for solvation. A detailed study of energy profiles for the two-step mechanism for alkylation of guanine and adenine was performed. Alkylation of guanine is ∼6 kcal mol(-1) preferred over adenine, and the factors contributing to this preference were explained in our previous study of cisplatin binding to purine bases. A detailed analysis of energy profiles of mechlorethamine and melphalan binding to guanine and adenine are presented to provide an insight into rate limiting step and the difference in reactivity and stability of the intermediate in both nitrogen mustards, respectively.
Collapse
Affiliation(s)
- Abhigna Polavarapu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | | | | | | | | |
Collapse
|
11
|
Li JY, Zhao BX, Zhang W, Li C, Huang XJ, Wang Y, Sun PH, Ye WC, Chen WM. Unexpected ring contraction and oxidation rearrangement reactions of securinine. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.03.084] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
12
|
De Rycke N, David O, Couty F. Assessing the rates of ring-opening of aziridinium and azetidinium ions: a dramatic ring size effect. Org Lett 2011; 13:1836-9. [PMID: 21384826 DOI: 10.1021/ol200348k] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Rates for the ring-opening of aziridinium and azetidinium ions by DMAP were measured. The four-membered ring appears to be ca. 17,000 times less reactive compared to the three-membered ring but is still highly relevant from a synthetic viewpoint. The electrophilicity of these strained ammonium ions is measured for the first time.
Collapse
Affiliation(s)
- Nicolas De Rycke
- Institut Lavoisier-Versailles, UMR 8180, Université de Versailles St-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles Cedex, France
| | | | | |
Collapse
|