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Li N, Hou L, Li S. Distinct Subgroups of Patients With Lung Cancer Receiving Chemotherapy: A Latent Transition Analysis. Front Oncol 2020; 10:522407. [PMID: 33163391 PMCID: PMC7591394 DOI: 10.3389/fonc.2020.522407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 08/14/2020] [Indexed: 11/13/2022] Open
Abstract
Objectives To identify subgroups of patients with lung cancer receiving chemotherapy based on the severity dimension of symptom experience, and to examine changes in membership between these subgroups over time. Methods Patients who were scheduled to receive chemotherapy completed the Chinese version of the MD Anderson Symptom Inventory and the revised lung cancer module with a total of 19 symptom items. Data were collected at three time points: two weeks before chemotherapy (T1), after chemotherapy cycle 1 (T2), and after chemotherapy cycle 3 or above (T3). The latent profile analysis and latent transition analysis were used to identify underlying subgroups and describe changes in subgroup membership over time. Results From the total sample (N = 195), 160 patients completed the symptom assessment at T1, T2, and T3. Two distinct latent symptom profiles of patients could be identified at T1, T2, and T3, which were classified as "Mild" and "Moderate-Severe" profiles. From T1 to T2 and T3, members in the Mild profile were more likely to move to the Moderate-Severe profile. Chemotherapy protocols, prior surgery treatment, and level of education can predict the transitions. Conclusion Results provide a better understanding of the patient's different symptom experiences and characteristics. These could help clinicians to anticipate symptom patterns and develop interventions in lung cancer patients who were scheduled to receive chemotherapy for the first time.
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Affiliation(s)
- Nannan Li
- School of Nursing, Shanghai Jiao Tong University, Shanghai, China
| | - Lili Hou
- Department of Nursing, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shu Li
- Department of Nursing, Shanghai Seventh People's Hospital, Shanghai, China
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Morrison KA, Bythell BJ, Clowers BH. Interrogating Proton Affinities of Organophosphonate Species Via Atmospheric Flow Tube Mass Spectrometry and Computational Methods. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:1308-1320. [PMID: 30993636 DOI: 10.1007/s13361-019-02202-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 03/19/2019] [Accepted: 03/19/2019] [Indexed: 06/09/2023]
Abstract
Within trace vapor analysis in environmental monitoring, defense, and industry, atmospheric flow tube mass spectrometry (AFT-MS) can fill a role that incorporates non-contact vapor analysis with the selectivity and low detection limits of mass spectrometry. AFT-MS has been applied to quantitating certain explosives by selective clustering with nitrate and more recently applied to detecting tributyl phosphate and dimethyl methylphosphonate as protonated species. Developing AFT-MS methods for organophosphorus species is appealing, given that this class of compounds includes a range of pollutants, chemical warfare agent (CWA) simulants, and CWA degradation products. A key aspect of targeting organophosphorus analytes has included the use of dopant ion chemistry to form adducts that impart additional analytical selectivity. The assessment of potential dopant molecules suited to enhance detection of these compounds is hindered by few published ion thermochemical properties for organophosphorus species, such as proton affinity, which can be used for approximating proton-bound dimer bond strength. As a preliminary investigation for the progression of sensing methods involving AFT-MS, we have applied both the extended kinetic method and computational approaches to eight organophosphorus CWA simulants to determine their respective gas-phase proton affinities. Notable observed trends, supported by computational efforts, include an increase in proton affinity as the alkyl chain lengths on the phosphonates increased. Graphical Abstract .
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Ewing RG, Valenzuela BR. Selective Reagent Ions for the Direct Vapor Detection of Organophosphorus Compounds Below Parts-per-Trillion Levels. Anal Chem 2018; 90:7583-7590. [PMID: 29812936 DOI: 10.1021/acs.analchem.8b01265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Real-time low to sub parts-per-trillion (pptv) vapor detection of some organophosphorous compounds (OPCs) is demonstrated with an atmospheric flow tube-mass spectrometer. The chemical species investigated included dimethyl methylphosphonate, triethyl phosphate, and tributylphosphate. The atmospheric flow tube provides ambient chemical ionization with up to several seconds of ionization time. With sensitivities in the parts-per-quadrillion (ppqv) range, there are many background contaminants competing for charge with the target analytes. Initially, the OPCs were not observable in direct room air analysis, presumably due to other trace components possessing higher proton affinities. However, the addition of a trialkylamine as a dopant chemical served to provide a single reagent ion that also formed a proton-bound heterodimer with the OPCs. These asymmetric proton-bound dimers had sufficiently high hydrogen bond energy to allow the cluster to remain intact during the analysis time of several seconds. Changes in stability were observed for some of these asymmetric proton-bound dimers with a shorter half-life for adducts with a larger proton affinity differences between the amine and the OPC. Detection levels approaching low pptv to high ppqv were correlated by three different methods, including use of a permeation tube, direct injection of a fixed mass into the sample air flow, and calculations based upon signal intensity ratios, reaction time, and an estimated reaction rate constant. A practical demonstration showed real-time monitoring of a laboratory environment initially with low pptv levels of vapor observed to decay exponentially over about an hour while returning to baseline levels.
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Affiliation(s)
- Robert G Ewing
- Pacific Northwest National Laboratory , 902 Battelle Blvd. , Richland , Washington 99352 , United States
| | - Blandina R Valenzuela
- Pacific Northwest National Laboratory , 902 Battelle Blvd. , Richland , Washington 99352 , United States
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Ion mobility spectrometry: Current status and application for chemical warfare agents detection. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.06.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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IMASAKA T, IMASAKA T. An Evaluation of the Spectral Properties of Nerve Agents for Laser Ionization Mass Spectrometry. ANAL SCI 2014; 30:1113-20. [DOI: 10.2116/analsci.30.1113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Tomoko IMASAKA
- Laboratory of Chemistry, Graduate School of Design, Kyushu University
| | - Totaro IMASAKA
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
- Division of Optoelectronics and Photonics, Center for Future Chemistry, Kyushu University
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Hernández SC, Bennett CJC, Junkermeier CE, Tsoi SD, Bezares FJ, Stine R, Robinson JT, Lock EH, Boris DR, Pate BD, Caldwell JD, Reinecke TL, Sheehan PE, Walton SG. Chemical gradients on graphene to drive droplet motion. ACS NANO 2013; 7:4746-4755. [PMID: 23659463 DOI: 10.1021/nn304267b] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This work demonstrates the production of a well-controlled, chemical gradient on the surface of graphene. By inducing a gradient of oxygen functional groups, drops of water and dimethyl-methylphosphonate (a nerve agent simulant) are "pulled" in the direction of increasing oxygen content, while fluorine gradients "push" the droplet motion in the direction of decreasing fluorine content. The direction of motion is broadly attributed to increasing/decreasing hydrophilicity, which is correlated to high/low adhesion and binding energy. Such tunability in surface chemistry provides additional capabilities in device design for applications ranging from microfluidics to chemical sensing.
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Affiliation(s)
- Sandra C Hernández
- NRC Postdoctoral Research Associateship Program, Naval Research Laboratory, Washington, DC 20375, USA.
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Puton J, Holopainen SI, Mäkinen MA, Sillanpää MET. Quantitative Response of IMS Detector for Mixtures Containing Two Active Components. Anal Chem 2012; 84:9131-8. [DOI: 10.1021/ac3018108] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jarosław Puton
- Faculty of Advanced
Technology and Chemistry, Military University of Technology, Kaliskiego 2, 00-908 Warsaw, Poland
| | - Sanna I. Holopainen
- Faculty of Technology, Lappeenranta University of Technology, Sammonkatu 12, 50130 Mikkeli, Finland
| | - Marko A. Mäkinen
- Department of Chemistry, University of Eastern Finland, P.O.
Box 111, 80101 Joensuu, Finland
| | - Mika E. T. Sillanpää
- Faculty of Technology, Lappeenranta University of Technology, Sammonkatu 12, 50130 Mikkeli, Finland
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Investigation of dimethyl methylphosphonate (DMMP) with an Ion mobility spectrometer using a pulsed electron source. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s12127-011-0065-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bera NC, Maeda S, Morokuma K, Viggiano AA. Theoretical Proton Affinity and Fluoride Affinity of Nerve Agent VX. J Phys Chem A 2010; 114:13189-97. [DOI: 10.1021/jp107718w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Narayan C. Bera
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States, and Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom AFB, Massachusetts 01731-3010, United States
| | - Satoshi Maeda
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States, and Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom AFB, Massachusetts 01731-3010, United States
| | - Keiji Morokuma
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States, and Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom AFB, Massachusetts 01731-3010, United States
| | - Al A. Viggiano
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States, and Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom AFB, Massachusetts 01731-3010, United States
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Midey AJ, Miller TM, Viggiano AA, Bera NC, Maeda S, Morokuma K. Ion Chemistry of VX Surrogates and Ion Energetics Properties of VX: New Suggestions for VX Chemical Ionization Mass Spectrometry Detection. Anal Chem 2010; 82:3764-71. [DOI: 10.1021/ac100176r] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Anthony J. Midey
- Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Rd., Hanscom AFB, Massachusetts 01731-3010, and Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia
| | - Thomas M. Miller
- Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Rd., Hanscom AFB, Massachusetts 01731-3010, and Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia
| | - A. A. Viggiano
- Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Rd., Hanscom AFB, Massachusetts 01731-3010, and Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia
| | - Narayan C. Bera
- Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Rd., Hanscom AFB, Massachusetts 01731-3010, and Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia
| | - Satoshi Maeda
- Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Rd., Hanscom AFB, Massachusetts 01731-3010, and Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia
| | - Keiji Morokuma
- Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Rd., Hanscom AFB, Massachusetts 01731-3010, and Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia
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A determination of the effective temperatures for the dissociation of the proton bound dimer of dimethyl methylphosphonate in a planar differential mobility spectrometer. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s12127-010-0037-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Francis GJ, Milligan DB, McEwan MJ. Detection and Quantification of Chemical Warfare Agent Precursors and Surrogates by Selected Ion Flow Tube Mass Spectrometry. Anal Chem 2009; 81:8892-9. [DOI: 10.1021/ac901486c] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gregory J. Francis
- Syft Technologies, 3 Craft Place, Middleton, Christchurch 8024, New Zealand, and Department of Chemistry, University of Canterbury, Christchurch 8041, New Zealand
| | - Daniel B. Milligan
- Syft Technologies, 3 Craft Place, Middleton, Christchurch 8024, New Zealand, and Department of Chemistry, University of Canterbury, Christchurch 8041, New Zealand
| | - Murray J. McEwan
- Syft Technologies, 3 Craft Place, Middleton, Christchurch 8024, New Zealand, and Department of Chemistry, University of Canterbury, Christchurch 8041, New Zealand
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