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Guo Y, Li P, Wang Z, Zhang P, Wu X. Sustained Delivery of Methylsulfonylmethane from Biodegradable Scaffolds Enhances Efficient Bone Regeneration. Int J Nanomedicine 2022; 17:4829-4842. [PMID: 36246935 PMCID: PMC9558569 DOI: 10.2147/ijn.s377036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 10/02/2022] [Indexed: 11/07/2022] Open
Abstract
Introduction As a popular dietary supplement containing sulfur compound, methylsulfonylmethane (MSM) has been widely used as an alternative oral medicine to relieve joint pain, reduce inflammation and promote collagen protein synthesis. However, it is rarely used in developing bioactive scaffolds in bone tissue engineering. Methods Three-dimensional (3D) hydroxyapatite/poly (lactide-co-glycolide) (HA/PLGA) porous scaffolds with different doping levels of MSM were prepared using the phase separation method. MSM loading efficiency, in vitro drug release as well as the biological activity of MSM-loaded scaffolds were investigated by incubating mouse pre-osteoblasts (MC3T3-E1) in the uniform and interconnected porous scaffolds. Results Sustained release of MSM from the scaffolds was observed, and the total MSM release from 1% and 10% MSM/HA/PLGA scaffolds within 16 days was up to 64.9% and 68.2%, respectively. Cell viability, proliferation, and alkaline phosphatase (ALP) activity were significantly promoted by incorporating 0.1% of MSM in the scaffolds. In vivo bone formation ability was significantly enhanced for 1% MSM/HA/PLGA scaffolds indicated by the repair of rabbit radius defects which might be affected by a stimulated release of MSM by enzyme systems in vivo. Discussion Finding from this study revealed that the incorporation of MSM would be effective in improving the osteogenesis activity of the HA/PLGA porous scaffolds.
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Affiliation(s)
- Yueming Guo
- Department of Orthopaedics, Foshan Hospital of Traditional Chinese Medicine, Foshan, 528000, People’s Republic of China
| | - Pengpeng Li
- Xuzhou Central Hospital, Xuzhou, 221009, People’s Republic of China,Graduate School of Bengbu Medical College, Bengbu, 233030, People’s Republic of China
| | - Zongliang Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Peibiao Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Xiaodong Wu
- Xuzhou Central Hospital, Xuzhou, 221009, People’s Republic of China,Correspondence: Xiaodong Wu; Peibiao Zhang, Email ;
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Wang XL, Tian JY, Guo XC, Zhang FQ, Liang L, Zhang XM. Cd-Based Metal-Organic Framework for Selective Turn-On Fluorescent DMSO Residual Sensing. Chemistry 2021; 27:3753-3760. [PMID: 33145861 DOI: 10.1002/chem.202004111] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/18/2020] [Indexed: 11/11/2022]
Abstract
Dimethyl sulfoxide (DMSO) is a universally used solvent in various synthetic reactions, and trace amounts of DMSO residual are often seen on the surface of chemical product. It is difficult to quickly determine whether the residual DMSO is washed completely. This work reports a CdII metal-organic framework (MOF) SXU-4 which can detect trace amounts of DMSO in various solvents. Fluorescence experiments reveal its turn-on fluorescence effect toward DMSO with high selectivity and sensitivity, indicating that it can be used as an effective luminescent probe for rapid chemical product purity detection by testing the washing solution. Crystallographically characterized DMSO loaded SXU-4 (DMSO@SXU-4), in combination with computational results uncover that the enhanced DMSO-MOF conjugation through multiple DMSO-MOF supramolecule interactions and charge rearrangement are the main causes of fluorescence intensification.
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Affiliation(s)
- Xiao-Lu Wang
- Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Jia-Yue Tian
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, China
| | - Xuan-Chen Guo
- Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Fu-Qiang Zhang
- School of Chemistry and Materials Science, Shanxi Normal University, Linfen, 041001, Shanxi, China
| | - Linfeng Liang
- Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Xian-Ming Zhang
- Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, Shanxi, China.,School of Chemistry and Materials Science, Shanxi Normal University, Linfen, 041001, Shanxi, China
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Takeuchi A, Namera A, Sakui N, Yamamoto S, Yamamuro K, Nishinoiri O, Endo Y, Endo G. Direct methyl esterification with 2,2-dimethoxypropane for the simultaneous determination of urinary metabolites of toluene, xylene, styrene, and ethylbenzene by gas chromatography-mass spectrometry. J Occup Health 2019; 61:82-90. [PMID: 30698338 PMCID: PMC6499357 DOI: 10.1002/1348-9585.12026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/09/2018] [Accepted: 08/20/2018] [Indexed: 11/17/2022] Open
Abstract
Objectives The purpose of this study was to develop a simple and accurate gas chromatography‐mass spectrometry (GC‐MS) method for simultaneous determination of four urinary metabolites from four organic solvents, that is, hippuric acid (HA) from toluene, methylhippuric acid (MHA) from xylene, and mandelic acid (MA) and phenylglyoxylic acid (PGA) from styrene or ethylbenzene for biological monitoring. Methods The four metabolites were directly methyl‐esterified with 2,2‐dimethoxypropane and analyzed using GC‐MS. The proposed method was validated according to the US Food and Drug Administration guidance. The accuracy of the proposed method was confirmed by analyzing a ClinChek®—Control for occupational medicine (RECIPE Chemicals +Instruments GmbH). Results Calibration curves showed linearity in the concentration range of 10‐1000 mg/L for each metabolite, with correlation coefficients >0.999. For each metabolite, the limits of detection and quantification were 3 mg/L and 10 mg/L, respectively. The recovery was 93%‐117%, intraday accuracy, expressed as the deviation from the nominal value, was 92.7%‐103.0%, and intraday precision, expressed as the relative standard deviation (RSD), was 1.3%‐4.7%. Interday accuracy and precision were 93.4%‐104.0% and 1.2%‐9.5%, respectively. The analytical values of ClinChek obtained using the proposed method were sufficiently accurate. Conclusions The proposed method is a simple and accurate which is suitable for routine analyses that could be used for biological monitoring of occupational exposure to four organic solvents.
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Affiliation(s)
- Akito Takeuchi
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, Japan
| | - Akira Namera
- Department of Forensic Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | | | - Shinobu Yamamoto
- Department of Environmental Measurement and Control, School of Health Sciences, University of Occupational and Environmental Health, Japan.,Department of Social and Environmental Medicine, Faculty of Medicine, Saga University, Japan
| | - Kenji Yamamuro
- Occupational Health Research and Development Center, Japan Industrial Safety and Health Association, Japan
| | - Osamu Nishinoiri
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, Japan
| | - Yoko Endo
- Endo Occupational Health Consultant Office, Japan
| | - Ginji Endo
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, Japan
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Ravouru N, Venna RSA, Penjuri SCB, Damineni S, Kotakadi VS, Poreddy SR. Fabrication and Characterization of Gliclazide Nanocrystals. Adv Pharm Bull 2018; 8:419-427. [PMID: 30276138 PMCID: PMC6156478 DOI: 10.15171/apb.2018.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 05/24/2018] [Accepted: 08/15/2018] [Indexed: 11/09/2022] Open
Abstract
Purpose: The main aim of the present investigation was to enhance the solubility of poorly soluble Gliclazide by nanocrystallization. Methods: In present investigation gliclazide nanocrystals were prepared by sonoprecipitation using Pluronic F68, Poly Vinyl Alcohol (PVA), Poly ethylene Glycol 6000 (PEG), Poly Vinyl Pyrrolidine (PVP K30) and Sodium Lauryl Sulphate (SLS) as stabilizers. Fourier Transform Infrared Spectroscopic study (FTIR), Differential Scanning Calorimetry (DSC) and X ray diffraction (XRD) studies were conducted to study the drug interactions. Size and zeta potential of the nanocrystals were evaluated. In vitro and in vivo studies of nanocrystals were conducted in comparison to pure gliclazide. Results: The Gliclazide nanocrystals (GN) showed mean particle size of 131±7.7 nm with a zeta potential of -26.6 mV. Stable nanocrystals were formed with 0.5% of PEG 6000. FTIR, DSC and XRD studies of nanocrystals showed absence of interactions and polymorphism. SEM photographs showed a change in morphology of crystals from rod to irregular shape. There is an increase in the saturation solubility and the percentage drug release from formulation GN5 (Optimized Gliclazide Nanocrystals) was found to be 98.5 in 15 min. In the in vivo study, GN5 nanocrystals have reduced the blood glucose level to 296.4±4.26 mg/dl in 12 hr. The nanocrystals showed lower tmax and higher Cmax values as compared to pure gliclazide. Conclusion: The prepared nanocrystals of gliclazide were stable without any drug polymer interactions. Increase in the dissolution of nanocrystals compared to pure gliclazide and significant reduction in blood glucose level in vivo indicated better bioavailability of the nanocrystals. Therefore, it is concluded that nanocrystal technology can be a promising tool to improve solubility and hence dissolution of a hydrophobic drug.
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Affiliation(s)
- Nagaraju Ravouru
- Institute of Pharmaceutical Technology, Sri Padmavathi Mahila University, Tirupati, Andhra Pradesh, India
| | | | | | - Saritha Damineni
- Department of Pharmaceutics, Sultan-ul-Uloom College of Pharmacy, Hyderabad, Telangana, India
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Butawan M, Benjamin RL, Bloomer RJ. Methylsulfonylmethane: Applications and Safety of a Novel Dietary Supplement. Nutrients 2017; 9:E290. [PMID: 28300758 PMCID: PMC5372953 DOI: 10.3390/nu9030290] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/22/2017] [Accepted: 03/13/2017] [Indexed: 12/20/2022] Open
Abstract
Methylsulfonylmethane (MSM) has become a popular dietary supplement used for a variety of purposes, including its most common use as an anti-inflammatory agent. It has been well-investigated in animal models, as well as in human clinical trials and experiments. A variety of health-specific outcome measures are improved with MSM supplementation, including inflammation, joint/muscle pain, oxidative stress, and antioxidant capacity. Initial evidence is available regarding the dose of MSM needed to provide benefit, although additional work is underway to determine the precise dose and time course of treatment needed to provide optimal benefits. As a Generally Recognized As Safe (GRAS) approved substance, MSM is well-tolerated by most individuals at dosages of up to four grams daily, with few known and mild side effects. This review provides an overview of MSM, with details regarding its common uses and applications as a dietary supplement, as well as its safety for consumption.
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Affiliation(s)
- Matthew Butawan
- Center for Nutraceutical and Dietary Supplement Research, School of Health Studies, The University of Memphis, Memphis, TN 38152, USA.
| | | | - Richard J Bloomer
- Center for Nutraceutical and Dietary Supplement Research, School of Health Studies, The University of Memphis, Memphis, TN 38152, USA.
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Mochalski P, Unterkofler K, Španěl P, Smith D, Amann A. Product ion distributions for the reactions of NO(+) with some physiologically significant volatile organosulfur and organoselenium compounds obtained using a selective reagent ionization time-of-flight mass spectrometer. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:1683-1690. [PMID: 24975248 PMCID: PMC4142009 DOI: 10.1002/rcm.6947] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/09/2014] [Accepted: 05/13/2014] [Indexed: 06/03/2023]
Abstract
RATIONALE The reactions of NO(+) with volatile organic compounds (VOCs) in Selective Reagent Ionization Time-of-Flight Mass Spectrometry (SRI-TOF-MS) reactors are relatively poorly known, inhibiting their use for trace gas analysis. The rationale for this product ion distribution study was to identify the major product ions of the reactions of NO(+) ions with 13 organosulfur compounds and 2 organoselenium compounds in an SRI-TOF-MS instrument and thus to prepare the way for their analysis in exhaled breath, in skin emanations and in the headspace of urine, blood and cell and bacterial cultures. METHODS Product ion distributions have been investigated by a SRI-TOF-MS instrument at an E/N in the drift tube reactor of 130 Td for both dry air and humid air (4.9% absolute humidity) used as the matrix gas. The investigated species were five monosulfides (dimethyl sulfide, ethyl methyl sulfide, methyl propyl sulfide, allyl methyl sulfide and methyl 5-methyl-2-furyl sulfide), dimethyl disulfide, dimethyl trisulfide, thiophene, 2-methylthiophene, 3-methylthiophene, methanethiol, allyl isothiocyanate, dimethyl sulfoxide, and two selenium compounds - dimethyl selenide and dimethyl diselenide. RESULTS Charge transfer was seen to be the dominant reaction mechanism in all reactions under study forming the M(+) cations. For methanethiol and allyl isothiocyanate significant fractions were also observed of the stable adduct ions NO(+) M, formed by ion-molecule association, and [M-H](+) ions, formed by hydride ion transfer. Several other minor product channels are seen for most reactions indicating that the nascent excited intermediate (NOM)(+) * adduct ions partially fragment along other channels, most commonly by the elimination of neutral CH3 , CH4 and/or C2 H4 species that are probably bound to an NO molecule. Humidity had little effect on the product ion distributions. CONCLUSIONS The findings of this study are of particular importance for data interpretation in studies of volatile organosulfur and volatile organoselenium compounds employing SRI-TOF-MS in the NO(+) mode.
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Affiliation(s)
- Paweł Mochalski
- Breath Research Institute of the University of InnsbruckRathausplatz 4, A-6850, Dornbirn, Austria
| | - Karl Unterkofler
- Breath Research Institute of the University of InnsbruckRathausplatz 4, A-6850, Dornbirn, Austria
- Vorarlberg University of Applied SciencesHochschulstr. 1, A-6850, Dornbirn, Austria
| | - Patrik Španěl
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech RepublicDolejškova 3, 18223, Prague 8, Czech Republic
| | - David Smith
- Institute for Science and Technology in Medicine, Medical School, Keele UniversityThornburrow Drive, Hartshill, Stoke-on-Trent, ST4 7QB, UK
| | - Anton Amann
- Breath Research Institute of the University of InnsbruckRathausplatz 4, A-6850, Dornbirn, Austria
- Univ.-Clinic for Anesthesia and Intensive Care, Innsbruck Medical UniversityAnichstr, 35, A-6020, Innsbruck, Austria
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Salama NN, El Ries MA, Toubar S, Abd El Hamid M, Walash MI. Thermoanalytical investigation of some sulfone-containing drugs. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2012; 2012:439082. [PMID: 22792516 PMCID: PMC3389717 DOI: 10.1155/2012/439082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 02/13/2012] [Accepted: 02/20/2012] [Indexed: 05/03/2023]
Abstract
The thermal behavior of some sulfone-containing drugs, namely, dapsone (DDS), dimethylsulfone (MSM), and topiramate (TOP) in drug substances, and products were investigated using different thermal techniques. These include thermogravimetry (TGA), derivative thermogravimetry (DTG), differential thermal analysis (DTA), and differential scanning calorimetry (DSC). The thermogravimetric data allowed the determination of the kinetic parameters: activation energy (E(a)), frequency factor (A), and reaction order (n). The thermal degradation of dapsone and topiramate was followed a first-order kinetic behavior. The calculated data evidenced a zero-order kinetic for dimethylsulfone. The relative thermal stabilities of the studied drugs have been evaluated and follow the order DDS > TOP > MSM. The purity was determined using DSC for the studied compounds, in drug substances and products. The results were in agreement with the recommended pharmacopoeia and manufacturer methods. DSC curves obtained from the tablets suggest compatibility between the drugs, excipients and/or coformulated drugs. The fragmentation pathway of dapsone with mass spectrometry was taken as example, to correlate the thermal decomposition with the resulted MS-EI. The decomposition modes were investigated, and the possible fragmentation pathways were suggested by mass spectrometry.
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Affiliation(s)
- Nahla N. Salama
- Pharmaceutical Chemistry Department, National Organization for Drug Control and Research, Pyramids Avenue, P.O. Box 29, Giza, Egypt
- *Nahla N. Salama:
| | - Mohammed A. El Ries
- Pharmaceutical Chemistry Department, National Organization for Drug Control and Research, Pyramids Avenue, P.O. Box 29, Giza, Egypt
| | - Safaa Toubar
- Analytical Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo 1860, Egypt
| | - Maha Abd El Hamid
- Pharmaceutical Chemistry Department, National Organization for Drug Control and Research, Pyramids Avenue, P.O. Box 29, Giza, Egypt
| | - Mohammed I. Walash
- Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
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