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Iizuka Y, Hiraoka M, Kokubo M, Sakamoto T, Karasawa K, Murofushi K, Nakamura M, Matsuo Y, Morita S, Inokuchi H, Mizowaki T. Dynamic tumor-tracking stereotactic body radiotherapy with real-time monitoring of liver tumors using a gimbal-mounted linac: A multi-institutional phase II study. Clin Transl Radiat Oncol 2023; 39:100591. [PMID: 36852258 PMCID: PMC9958254 DOI: 10.1016/j.ctro.2023.100591] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 02/05/2023] [Indexed: 02/12/2023] Open
Abstract
Background and purpose This prospective multicenter phase II study aimed to evaluate the safety and efficacy of dynamic tumor tracking (DTT) stereotactic body radiotherapy (SBRT) with real-time monitoring of liver tumors using a gimbal-mounted system. Materials and methods Patients with < 4 primary or metastatic liver tumors with diameters ≤ 50 mm and expected to have a respiratory motion of ≥ 10 mm were eligible. The prescribed dose was 40 Gy in five fractions. The primary endpoint was local control (LC) at 2 years. The secondary endpoints were overall survival (OS), progression-free survival (PFS), treatment-related toxicity, and tracking accuracy. Results Between September 2015 and March 2019, 48 patients (48 lesions) with a median age of 74 years were enrolled from four institutions. Of these, 39 were diagnosed with hepatocellular carcinoma and nine with metastatic liver cancer. The median tumor diameter was 17.5 mm. DTT-SBRT was successfully performed in all patients; the median treatment time was 28 min/fraction. The median follow-up period was 36.5 months. The 2-year LC, OS, and PFS rates were 98.0 %, 88.8 %, and 55.1 %, respectively. Disease progression was observed in 33 (68.8 %) patients. One patient (0.2 %) had local recurrence, 31 (64.6 %) developed new hepatic lesions outside the irradiation field, and nine (18.8 %) had distant metastases (including overlap). Grade 3 late adverse events were observed in seven patients (14.5 %). No grade 4 or 5 treatment-related toxicity was observed. The median tracking accuracy was 2.9 mm. Conclusion Employing DTT-SBRT to treat liver tumors results in excellent LC with acceptable adverse-event incidence.
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Key Words
- 4D, four-dimensional
- CT, computed tomography
- CTV, clinical target volume
- DTT, dynamic tumor tracking
- Dynamic tumor tracking
- GTV, gross tumor volume
- HCC, hepatocellular carcinoma
- IR, infrared
- LC, local control
- Liver
- Malignant neoplasms
- Metastasis
- OAR, organs at risk
- OS, overall survival
- PFS, progression-free survival
- PTV, planning target volume
- RFA, radiofrequency ablation
- SBRT, stereotactic body radiotherapy
- Stereotactic body radiotherapy
- TV, target volume
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Affiliation(s)
- Yusuke Iizuka
- Department of Radiation Oncology and Image-Applied Therapy, Kyoto University Graduate School of Medicine, Japan
- Corresponding author at: 54 Shogoin-Kawaharacho, Sakyo, Kyoto 6068507, Japan.
| | - Masahiro Hiraoka
- Department of Radiation Oncology, Japanese Red Cross Society Wakayama Medical Center, Japan
| | - Masaki Kokubo
- Department of Radiation Oncology, Kobe City Medical Center General Hospital, Japan
| | | | - Katsuyuki Karasawa
- Division of Radiation Oncology, Department of Radiology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Japan
| | - Keiko Murofushi
- Division of Radiation Oncology, Department of Radiology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Japan
| | - Mitsuhiro Nakamura
- Division of Medical Physics, Department of Information Technology and Medical Engineering, Human Health Sciences, Kyoto University, Japan
| | - Yukinori Matsuo
- Department of Radiation Oncology and Image-Applied Therapy, Kyoto University Graduate School of Medicine, Japan
| | - Satoshi Morita
- Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Japan
| | - Haruo Inokuchi
- Department of Radiation Oncology, Japanese Red Cross Society Wakayama Medical Center, Japan
| | - Takashi Mizowaki
- Department of Radiation Oncology and Image-Applied Therapy, Kyoto University Graduate School of Medicine, Japan
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Carlo MJ, Patrick AL. Infrared multiple photon dissociation (IRMPD) spectroscopy and its potential for the clinical laboratory. J Mass Spectrom Adv Clin Lab 2022; 23:14-25. [PMID: 34993503 PMCID: PMC8713122 DOI: 10.1016/j.jmsacl.2021.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 12/09/2021] [Accepted: 12/09/2021] [Indexed: 11/29/2022] Open
Abstract
Infrared multiple photon dissociation (IRMPD) spectroscopy is a powerful tool used to probe the vibrational modes-and, by extension, the structure-of an ion within an ion trap mass spectrometer. Compared to traditional FTIR spectroscopy, IRMPD spectroscopy has advantages including its sensitivity and its relative ability to handle complex mixtures. While IRMPD has historically been a technique for fundamental analyses, it is increasingly being applied in a more analytical fashion. Notable recent demonstrations pertinent to the clinical laboratory and adjacent interests include analysis of modified amino acids/residues and carbohydrates, structural elucidation (including isomeric differentiation) of metabolites, identification of novel illicit drugs, and structural studies of various biomolecules and pharmaceuticals. Improvements in analysis time, coupling to commercial instruments, and integration with separations methods are all drivers toward the realization of these analytical applications. Additional improvements in these areas, along with advances in benchtop tunable IR sources and increased cross-discipline collaboration, will continue to drive innovation and widespread adoption. The goal of this tutorial article is to briefly present the fundamentals and instrumentation of IRMPD spectroscopy, as an overview of the utility of this technique for helping to answer questions relevant to clinical analysis, and to highlight limitations to widespread adoption, as well as promising directions in which the field may be heading.
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Key Words
- 2-AEP, 2-aminoethylphosphonic acid
- 2P1EA, 2-phenyl-1-ethanolamine
- CIVP, cryogenic ion vibrational predissociation spectroscopy
- CLIO, Centre Laser Infrarouge d’Orsay
- DFT, density functional theory
- FA, fluoroamphetamine
- FEL, free electron laser
- FELIX, Free Electron Laser for Infrared eXperiments
- FMA, fluoromethamphetamine
- FTICR, Fourier transform ion cyclotron resonance
- GC–MS, gas chromatography-mass spectrometry
- GSNO, S- nitro glutathione
- GlcNAc, n-Acetylglucosamine
- IR, infrared
- IR2MS3, infrared-infrared double-resonance multi-stage mass spectrometry
- IRMPD, infrared multiple photon dissociation (IRMPD)
- IRMPD-MS, infrared multiple photon dissociation spectroscopy mass spectrometry
- IRPD, infrared predissociation spectroscopy
- IVR, intramolecular vibrational redistribution
- Infrared multiple photon dissociation spectroscopy
- LC, liquid chromatography
- LC-MS, liquid chromatography-mass spectrometry
- LC-MS/MS, liquid chromatography-tandem mass spectrometry
- MDA, methylenedioxyamphetamine
- MDMA, methylenedioxymethamphetamine
- MMC, methylmethcathinone
- MS/MS, tandem mass spectrometry
- MSn, multi-stage mass spectrometry
- Mass spectrometry
- Metabolites
- NANT, N-acetyl-N-nitrosotryptophan
- OPO/A, optical parametric oscillator/amplifier
- PTM, post-translational modification
- Pharmaceuticals
- Post-translational modifications
- SNOCys, S-nitrosocysteine
- UV, ultraviolet
- UV-IR, ultraviolet-infrared
- Vibrational spectroscopy
- cw, continuous wave
- α-PVP, alpha-pyrrolidinovalerophenone
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Affiliation(s)
- Matthew J. Carlo
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
| | - Amanda L. Patrick
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
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Zhang Y, Wang T, Tian Y, Zhang C, Ge K, Zhang J, Chang J, Wang H. Gold nanorods-mediated efficient synergistic immunotherapy for detection and inhibition of postoperative tumor recurrence. Acta Pharm Sin B 2021; 11:1978-1992. [PMID: 34386332 PMCID: PMC8343192 DOI: 10.1016/j.apsb.2021.03.035] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/31/2021] [Accepted: 02/04/2021] [Indexed: 02/06/2023] Open
Abstract
Tumor recurrence after surgery is the main cause of treatment failure. However, the initial stage of recurrence is not easy to detect, and it is difficult to cure in the late stage. In order to improve the life quality of postoperative patients, an efficient synergistic immunotherapy was developed to achieve early diagnosis and treatment of post-surgical tumor recurrence, simultaneously. In this paper, two kinds of theranostic agents based on gold nanorods (AuNRs) platform were prepared. AuNRs and quantum dots (QDs) in one agent was used for the detection of carcinoembryonic antigen (CEA), using fluorescence resonance energy transfer (FRET) technology to indicate the occurrence of in situ recurrence, while AuNRs in the other agent was used for photothermal therapy (PTT), together with anti-PDL1 mediated immunotherapy to alleviate the process of tumor metastasis. A series of assays indicated that this synergistic immunotherapy could induce tumor cell death and the increased generation of CD3+/CD4+ T-lymphocytes and CD3+/CD8+ T-lymphocytes. Besides, more immune factors (IL-2, IL-6, and IFN-γ) produced by synergistic immunotherapy were secreted than mono-immunotherapy. This cooperative immunotherapy strategy could be utilized for diagnosis and treatment of postoperative tumor recurrence at the same time, providing a new perspective for basic and clinical research.
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Key Words
- AFP, alpha fetoprotein
- AP1-QDs, CEA aptamer-modified CdTe QDs
- AP2-AuNRs, CEA aptamer-modified AuNRs
- AP2-AuNRs, and interferon-γ
- AgNO3, silver nitrate
- AuNRs, gold nanorods
- CA, cancer antigen
- CEA, carcinoembryonic antigen
- CTAB, cetrimonium bromide
- CTCs, circulating tumor cells
- Carcinoembryonic antigen
- CdCl2, cadmium chloride
- CdTe QDs, CdTe quantum dots
- DC, dendritic cells
- DLS, dynamic light scattering
- EDC, 1-ethyl-3-(3′-dimethylaminopropyl) carbodiimide
- FBS, fetal bovine serum
- FRET, fluorescence resonance energy transfer
- Fluorescence resonance energy transfer
- GSH, glutathione
- Gold nanorods
- HAuCl4, gold chloride
- Helf, human embryonic lung fibroblasts lines
- Hydrogel+IFN-γ+QA, thermal responsive hydrogels co-loaded with AP1-QDs
- Hydrogel+IFN-γ, thermal responsive hydrogels loaded with interferon-γ
- ICG, indocyanine green
- IFN-γ, interferon-γ
- IR, infrared
- LA+NIR, liposomes encapsulated AuNRs with near-infrared irradiation
- LA, liposomes encapsulated AuNRs
- LAI, liposomes loaded with ICG and encapsulated AuNRs
- LLC, murine lung cancer cells
- Lung metastasis
- MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- NHS, N-hydroxysuccinimide
- NIR, near-infrared irradiation
- NaBH4, sodium borohydride
- NaHTe, sodium hydrogen telluride
- PD1, programmed cell death protein 1
- PDL1, programmed cell death-ligand 1
- PI, propidium iodide
- PLGA-PEG-PLGA, thermal responsive hydrogel
- PTT, photothermal therapy
- Phototherapy
- Post-surgical tumor recurrence
- QDs, quantum dots
- Synergistic immunotherapy
- TEM, transmission electron microscope
- Theranostics
- aPDL1-LA+NIR, anti-PDL1-modified liposomes encapsulated AuNRs with near-infrared irradiation
- aPDL1-LA, anti-PDL1-modified liposomes encapsulated AuNRs
- aPDL1-LAI, anti-PDL1-modified liposomes loaded with ICG and encapsulated AuNRs
- anti-PDL1, anti-programmed cell death-ligand 1
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Affiliation(s)
- Yingying Zhang
- School of Life Sciences, Tianjin University, Tianjin 300072, China
- Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin 300072, China
| | - Tiange Wang
- School of Life Sciences, Tianjin University, Tianjin 300072, China
- Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin 300072, China
| | - Yu Tian
- School of Life Sciences, Tianjin University, Tianjin 300072, China
- Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin 300072, China
| | - Chaonan Zhang
- School of Life Sciences, Tianjin University, Tianjin 300072, China
- Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin 300072, China
| | - Kun Ge
- College of Chemistry & Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, Hebei University, Baoding 071002, China
| | - Jinchao Zhang
- College of Chemistry & Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, Hebei University, Baoding 071002, China
| | - Jin Chang
- School of Life Sciences, Tianjin University, Tianjin 300072, China
- Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin 300072, China
- Corresponding authors.
| | - Hanjie Wang
- School of Life Sciences, Tianjin University, Tianjin 300072, China
- Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin 300072, China
- Corresponding authors.
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Pang L, Zhu S, Ma J, Zhu L, Liu Y, Ou G, Li R, Wang Y, Liang Y, Jin X, Du L, Jin Y. Intranasal temperature-sensitive hydrogels of cannabidiol inclusion complex for the treatment of post-traumatic stress disorder. Acta Pharm Sin B 2021; 11:2031-2047. [PMID: 34386336 PMCID: PMC8343172 DOI: 10.1016/j.apsb.2021.01.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/15/2020] [Accepted: 01/06/2021] [Indexed: 11/26/2022] Open
Abstract
Post-traumatic stress disorder (PTSD) is a psychiatric disease that seriously affects brain function. Currently, selective serotonin reuptake inhibitors (SSRIs) are used to treat PTSD clinically but have decreased efficiency and increased side effects. In this study, nasal cannabidiol inclusion complex temperature-sensitive hydrogels (CBD TSGs) were prepared and evaluated to treat PTSD. Mice model of PTSD was established with conditional fear box. CBD TSGs could significantly improve the spontaneous behavior, exploratory spirit and alleviate tension in open field box, relieve anxiety and tension in elevated plus maze, and reduce the freezing time. Hematoxylin and eosin and c-FOS immunohistochemistry slides showed that the main injured brain areas in PTSD were the prefrontal cortex, amygdala, and hippocampus CA1. CBD TSGs could reduce the level of tumor necrosis factor-α caused by PTSD. Western blot analysis showed that CBD TSGs increased the expression of the 5-HT1A receptor. Intranasal administration of CBD TSGs was more efficient and had more obvious brain targeting effects than oral administration, as evidenced by the pharmacokinetics and brain tissue distribution of CBD TSGs. Overall, nasal CBD TSGs are safe and effective and have controlled release. There are a novel promising option for the clinical treatment of PTSD.
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Key Words
- AUC, area under the curve
- BBB, blood‒brain barrier
- Blood‒brain barrier
- Brain targeting
- CBD TSGs, cannabidiol inclusion complex temperature-sensitive hydrogels
- CNS, central nervous system
- COVID-19, coronavirus disease 2019
- Cannabidiol
- DSC, differential scanning calorimetry
- HP-β-CD, hydroxypropyl-β-cyclodextrin
- Hydrogels
- Hydroxypropyl-β-cyclodextrin
- IR, infrared
- IS, internal standard
- Inclusion complex
- Intranasal administration
- MRM, multiple reaction monitoring
- PPV, percentage of persistent vibration
- PTSD, post-traumatic stress disorder
- PVD, persistent vibration duration
- Post-traumatic stress disorder
- SSRIs, selective serotonin reuptake inhibitors
- TNF-α, tumor necrosis factor-α
- WB, Western blot
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Kohse-Höinghaus K. Combustion in the future: The importance of chemistry. Proc Combust Inst 2020; 38:S1540-7489(20)30501-0. [PMID: 33013234 PMCID: PMC7518234 DOI: 10.1016/j.proci.2020.06.375] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 05/18/2020] [Accepted: 06/28/2020] [Indexed: 06/11/2023]
Abstract
Combustion involves chemical reactions that are often highly exothermic. Combustion systems utilize the energy of chemical compounds released during this reactive process for transportation, to generate electric power, or to provide heat for various applications. Chemistry and combustion are interlinked in several ways. The outcome of a combustion process in terms of its energy and material balance, regarding the delivery of useful work as well as the generation of harmful emissions, depends sensitively on the molecular nature of the respective fuel. The design of efficient, low-emission combustion processes in compliance with air quality and climate goals suggests a closer inspection of the molecular properties and reactions of conventional, bio-derived, and synthetic fuels. Information about flammability, reaction intensity, and potentially hazardous combustion by-products is important also for safety considerations. Moreover, some of the compounds that serve as fuels can assume important roles in chemical energy storage and conversion. Combustion processes can furthermore be used to synthesize materials with attractive properties. A systematic understanding of the combustion behavior thus demands chemical knowledge. Desirable information includes properties of the thermodynamic states before and after the combustion reactions and relevant details about the dynamic processes that occur during the reactive transformations from the fuel and oxidizer to the products under the given boundary conditions. Combustion systems can be described, tailored, and improved by taking chemical knowledge into account. Combining theory, experiment, model development, simulation, and a systematic analysis of uncertainties enables qualitative or even quantitative predictions for many combustion situations of practical relevance. This article can highlight only a few of the numerous investigations on chemical processes for combustion and combustion-related science and applications, with a main focus on gas-phase reaction systems. It attempts to provide a snapshot of recent progress and a guide to exciting opportunities that drive such research beyond fossil combustion.
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Key Words
- 2M2B, 2-methyl-2-butene
- AFM, atomic force microscopy
- ALS, Advanced Light Source
- APCI, atmospheric pressure chemical ionization
- ARAS, atomic resonance absorption spectroscopy
- ATcT, Active Thermochemical Tables
- BC, black carbon
- BEV, battery electric vehicle
- BTL, biomass-to-liquid
- Biofuels
- CA, crank angle
- CCS, carbon capture and storage
- CEAS, cavity-enhanced absorption spectroscopy
- CFD, computational fluid dynamics
- CI, compression ignition
- CRDS, cavity ring-down spectroscopy
- CTL, coal-to-liquid
- Combustion
- Combustion chemistry
- Combustion diagnostics
- Combustion kinetics
- Combustion modeling
- Combustion synthesis
- DBE, di-n-butyl ether
- DCN, derived cetane number
- DEE, diethyl ether
- DFT, density functional theory
- DFWM, degenerate four-wave mixing
- DMC, dimethyl carbonate
- DME, dimethyl ether
- DMM, dimethoxy methane
- DRIFTS, diffuse reflectance infrared Fourier transform spectroscopy
- EGR, exhaust gas recirculation
- EI, electron ionization
- Emissions
- Energy
- Energy conversion
- FC, fuel cell
- FCEV, fuel cell electric vehicle
- FRET, fluorescence resonance energy transfer
- FT, Fischer-Tropsch
- FTIR, Fourier-transform infrared
- Fuels
- GC, gas chromatography
- GHG, greenhouse gas
- GTL, gas-to-liquid
- GW, global warming
- HAB, height above the burner
- HACA, hydrogen abstraction acetylene addition
- HCCI, homogeneous charge compression ignition
- HFO, heavy fuel oil
- HRTEM, high-resolution transmission electron microscopy
- IC, internal combustion
- ICEV, internal combustion engine vehicle
- IE, ionization energy
- IPCC, Intergovernmental Panel on Climate Change
- IR, infrared
- JSR, jet-stirred reactor
- KDE, kernel density estimation
- KHP, ketohydroperoxide
- LCA, lifecycle analysis
- LH2, liquid hydrogen
- LIF, laser-induced fluorescence
- LIGS, laser-induced grating spectroscopy
- LII, laser-induced incandescence
- LNG, liquefied natural gas
- LOHC, liquid organic hydrogen carrier
- LT, low-temperature
- LTC, low-temperature combustion
- MBMS, molecular-beam MS
- MDO, marine diesel oil
- MS, mass spectrometry
- MTO, methanol-to-olefins
- MVK, methyl vinyl ketone
- NOx, nitrogen oxides
- NTC, negative temperature coefficient
- OME, oxymethylene ether
- OTMS, Orbitrap MS
- PACT, predictive automated computational thermochemistry
- PAH, polycyclic aromatic hydrocarbon
- PDF, probability density function
- PEM, polymer electrolyte membrane
- PEPICO, photoelectron photoion coincidence
- PES, photoelectron spectrum/spectra
- PFR, plug-flow reactor
- PI, photoionization
- PIE, photoionization efficiency
- PIV, particle imaging velocimetry
- PLIF, planar laser-induced fluorescence
- PM, particulate matter
- PM10 PM2,5, sampled fractions with sizes up to ∼10 and ∼2,5 µm
- PRF, primary reference fuel
- QCL, quantum cascade laser
- RCCI, reactivity-controlled compression ignition
- RCM, rapid compression machine
- REMPI, resonance-enhanced multi-photon ionization
- RMG, reaction mechanism generator
- RON, research octane number
- Reaction mechanisms
- SI, spark ignition
- SIMS, secondary ion mass spectrometry
- SNG, synthetic natural gas
- SNR, signal-to-noise ratio
- SOA, secondary organic aerosol
- SOEC, solid-oxide electrolysis cell
- SOFC, solid-oxide fuel cell
- SOx, sulfur oxides
- STM, scanning tunneling microscopy
- SVO, straight vegetable oil
- Synthetic fuels
- TDLAS, tunable diode laser absorption spectroscopy
- TOF-MS, time-of-flight MS
- TPES, threshold photoelectron spectrum/spectra
- TPRF, toluene primary reference fuel
- TSI, threshold sooting index
- TiRe-LII, time-resolved LII
- UFP, ultrafine particle
- VOC, volatile organic compound
- VUV, vacuum ultraviolet
- WLTP, Worldwide Harmonized Light Vehicle Test Procedure
- XAS, X-ray absorption spectroscopy
- YSI, yield sooting index
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Tamfu AN, Sawalda M, Fotsing MT, Kouipou RMT, Talla E, Chi GF, Epanda JJE, Mbafor JT, Baig TA, Jabeen A, Shaheen F. A new isoflavonol and other constituents from Cameroonian propolis and evaluation of their anti-inflammatory, antifungal and antioxidant potential. Saudi J Biol Sci 2019; 27:1659-1666. [PMID: 32489308 PMCID: PMC7254033 DOI: 10.1016/j.sjbs.2019.11.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/24/2019] [Accepted: 11/26/2019] [Indexed: 12/20/2022] Open
Abstract
Propolis is rich in diverse bioactive compounds. Propolis samples were collected from three localities of Cameroon and used in the study. Column chromatography separation of propolis MeOH:DCM (50:50) extracts yielded a new isoflavonol, 2-hydroxy-8-prenylbiochanin A (1) alongside 2',3'-dihydroxypropyltetraeicosanoate (2) and triacontyl p-coumarate (3) isolated from propolis for first time together with seven compounds: β-amyrine (4), oleanolic acid (5), β-amyrine acetate (6), lupeol (7), betulinic acid (8), lupeol acetate (9) and lupenone (10). These compounds were tested for their inhibitory effect on oxidative burst where intracellular reactive oxygen species (ROS) were produced from zymosan stimulated human whole blood phagocytes and on production of nitric oxide (NO) from lipopolysaccharide (LPS) stimulated J774.2 mouse macrophages. The cytotoxicity of these compounds was evaluated on NIH-3 T3 normal mouse fibroblast cells, antiradical potential on 2,2-diphenyl-1-picrylhydrazylhydrazyl (DPPH·) as well as their anti-yeast potential on four selected candida species. Compound 1 showed higher NO inhibition (IC50 = 23.3 ± 0.3 µg/mL) than standard compound L-NMMA (IC50 = 24.2 ± 0.8 µg/mL). Higher ROS inhibition was shown by compounds 6 (IC50 = 4.3 ± 0.3 µg/mL) and 9 (IC50 = 1.1 ± 0.1 µg/mL) than Ibuprofen (IC50 = 11.2 ± 1.9 µg/mL). Furthermore, compound 1 displayed moderate level of cytotoxicity on NIH-3 T3 cells, with IC50 = 5.8 ± 0.3 µg/mL compared to the cyclohexamide IC50 = 0.13 ± 0.02 µg/mL. Compound 3 showed lower antifungal activity on Candida krusei and Candida glabrata, MIC of 125 μg/mL on each strain compared to 50 μg/mL for fuconazole. The extracts showed low antifungal activities ranging from 250 to 500 μg/mL on C. albicans, C. krusei and C. glabrata and the values of MIC on Candida parapsilosis were 500 μg/mL and above. DPPH* scavenging activity was exhibited by compounds 1 (IC50 = 15.653 ± 0.335 μg/mL) and 3 (IC50 = 89.077 ± 24.875 μg/mL) compared to Vitamin C (IC50 = 3.343 ± 0.271 μg/mL) while extracts showed moderate antiradical activities with IC50 values ranging from 309.31 ± 2.465 to 635.52 ± 11.05 µg/mL. These results indicate that compounds 1, 6 and 9 are potent anti-inflammatory drug candidates while 1 and 3 could be potent antioxidant drugs.
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Key Words
- 2-Hydroxy-8-prenylbiochanin A
- Antifungal activity
- DCM, dichloromethane
- DPPH radical scavenging
- DPPH, 2,2-diphenyl-1-picrylhydrazylhydrazyl
- EIMS, electronic impact mass spectrometry
- HREIMS, high resolution electronic impact mass spectrometry
- IR, infrared
- MIC, Minimal inhibitory concentration
- MTT, 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- NMR, Nuclear magnetic resonance
- NO inhibition
- NO, nitric oxide
- Propolis
- ROS inhibition
- ROS, reaction oxygen species
- TLC, Thin layer chromatography
- UV, Ultraviolet
- m.p, melting point
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Affiliation(s)
- Alfred Ngenge Tamfu
- Department of Organic Chemistry, Faculty of Sciences, University of Yaoundé 1, Cameroon.,H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Mathieu Sawalda
- Department of Materials Engineering, School of Chemical Engineering and Mineral Industries/Faculty of Science, University of Ngaoundéré, Cameroon
| | | | | | - Emmanuel Talla
- Department of Materials Engineering, School of Chemical Engineering and Mineral Industries/Faculty of Science, University of Ngaoundéré, Cameroon
| | - Godloves Fru Chi
- Department of Organic Chemistry, Faculty of Sciences, University of Yaoundé 1, Cameroon
| | - Justin Jacquin Epah Epanda
- Department of Materials Engineering, School of Chemical Engineering and Mineral Industries/Faculty of Science, University of Ngaoundéré, Cameroon
| | - Joseph Tanyi Mbafor
- Department of Organic Chemistry, Faculty of Sciences, University of Yaoundé 1, Cameroon
| | - Tariq Ahmad Baig
- Dr. Panjwani Center for Molecular Medicinal & Drug Research (PCMD), International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Almas Jabeen
- Dr. Panjwani Center for Molecular Medicinal & Drug Research (PCMD), International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Farzana Shaheen
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
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Mubtasim N, Kabir ER, Podder AK, Bhadra S. A pragmatic approach to the analysis of a combination formulation. Saudi Pharm J 2016; 24:689-697. [PMID: 27829812 PMCID: PMC5094434 DOI: 10.1016/j.jsps.2015.06.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 06/09/2015] [Indexed: 11/27/2022] Open
Abstract
The aim of the paper was to formulate a combined oral dosage form of rosuvastatin calcium and amlodipine besylate and to develop and validate an analytical method to be adopted for both routine quality control assay and in vitro dissolution studies of the formulation. The proposed combination formulation has shown compatibility with the chosen excipients, verified through FT-IR study. A novel gradient RP-HPLC method was developed and validated according to the ICH guideline which was found to be suitable for the simultaneous estimation of rosuvastatin calcium and amlodipine besylate from the formulation. The retention time of 2.7 and 6.08 min allows the analysis of large amount of samples with less mobile phase which makes the method economic. The dissolution profiles of both the drugs in different dissolution medium were encouraging which makes the combination formulation of rosuvastatin calcium and amlodipine besylate superior and effective in achieving patient compliance.
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Key Words
- % RSD, percentage relative standard deviation
- Amlodipine besylate
- BP, British Pharmacopeia
- CVD, cardiovascular disease
- Ca2+, calcium
- Combination formulation
- Compatible
- FDA, Food and Drug Administration
- FT-IR, Fourier Transform Infrared spectroscopy
- HMG-CoA, 3-hydroxy-3-methylglutaryl coenzyme-A
- ICH, International Conference on Harmonization
- IR, infrared
- LC, liquid chromatography
- LOD, limit of detection
- LOQ, limit of quantitation
- Method validation
- PDA, photo diode array
- RP-HPLC, reverse phase high performance liquid chromatography
- Rosuvastatin calcium
- THF, tetrahydrofuran
- USP, United States Pharmacopeia
- ml, milliliter
- μg, microgram
- μl, microliter
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Affiliation(s)
| | | | | | - Subrata Bhadra
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Dhaka, Bangladesh
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Samy W, Elnoby A, El-Gowelli HM, Elgindy N. Hybrid polymeric matrices for oral modified release of Desvenlafaxine succinate tablets. Saudi Pharm J 2016; 25:676-687. [PMID: 28725139 PMCID: PMC5506642 DOI: 10.1016/j.jsps.2016.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 10/07/2016] [Indexed: 11/29/2022] Open
Abstract
Purpose: Desvenlafaxine succinate (DSV) is a water soluble anti-depressant drug, which is rapidly absorbed after oral administration exaggerating its side effects. The current work aimed to prepare controllable release DSV matrix to reduce DSV side effects related to its initial burst. Methods: Fifteen DSV matrix formulations were prepared using different polymers, polymer/drug ratios and matrix excipients and characterized using Differential Scanning Calorimetry (DSC), infrared (IR) spectroscopy, water uptake and in vitro DSV release. The release kinetics were calculated to determine the drug release mechanism. Ex-vivo DSV absorption via rat intestinal mucosal cells and the calculation of the apparent permeability coefficient (Papp) were performed using everted sac technique. Results: Maltodextrin was the best matrix excipient (F7 and F10) showing acceptable decrease in the initial burst compared to the innovator. The addition of negatively charged polymers sodium carboxy methyl cellulose (SCMC) or sodium alginate resulted in an interaction that was proved by DSC and IR findings. This interaction slowed DSV release. F10 showed an excellent absorption of more than 80% of DSV after 4 h and the highest similarity factor with the innovator (84.7). Conclusion: A controllable release pattern of DSV was achieved using Methocel, Maltodextrin and SCMC. The obtained results could be used as a platform to control the release of cationic water soluble drugs that suffer from side effects associated with their initial burst after oral administration.
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Affiliation(s)
- Wael Samy
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Ayman Elnoby
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Hanan M El-Gowelli
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Nazik Elgindy
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
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