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Çağlayan M, Nassereddine A, Nastase SAF, Aguilar-Tapia A, Dikhtiarenko A, Chung SH, Shterk G, Shoinkhorova T, Hazemann JL, Ruiz-Martinez J, Cavallo L, Ould-Chikh S, Gascon J. Understanding W/H-ZSM-5 catalysts for the dehydroaromatization of methane. Catal Sci Technol 2023. [DOI: 10.1039/d3cy00103b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Tungsten is the most interesting and promising metal to replace molybdenum in methane dehydroaromatization (MDA) catalysis.
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Bohle DS, Wharf I, Gaydon Q, Kapuku B, Bellamare MJ, Paul M, Wynter T, Karageorghis PJ. Structural chemistry at McGill. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A brief description of some of the key individuals at McGill University and their contributions to the development of crystallography is given. This is followed by examples of recent structure determinations, which include organic heterocycles, natural products, inorganic salts, and organometallic complexes. Specifically, the bispyridinium adduct of protoporphyrin, the piperidinyl adduct of 3,7-dichloroquinine, trisbenzylmethylthiol, sodium methylarsonium (V), potassium hydroxylamine sulfonate, Vaska’s complex adduct from the oxidative addition of p-tolylmercaptan, and a bis isocyanoiminotriphenylphosphorane adduct of rutheniumdichloridetristriphenylphosphine are described.
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Affiliation(s)
- D. Scott Bohle
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
| | - Ivor Wharf
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
| | - Quentin Gaydon
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
| | - Benita Kapuku
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
| | - Marie J. Bellamare
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
| | - Mirna Paul
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
| | - Tamika Wynter
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
| | - Philip J. Karageorghis
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC H3A 0B8, Canada
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3
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VanderSchee CR, Frier D, Kuter D, Mann KK, Jackson BP, Bohle DS. Quantification of local zinc and tungsten deposits in bone with LA-ICP-MS using novel hydroxyapatite-collagen calibration standards. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 2021; 36:2431-2438. [PMID: 35992610 PMCID: PMC9390078 DOI: 10.1039/d1ja00211b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Tungsten has recently emerged as a potential toxicant and is known to heterogeneously deposit in bone as reactive polytungstates. Zinc, which accumulates in regions of bone remodeling, also has a heterogenous distribution in bone. Determining the local concentrations of these metals will provide valuable information about their mechanisms of uptake and action. A series of bone (BN), 7:3 hydroxyapatite:collagen (HC), and hydroxyapatite (HA) standards were spiked with tungsten and zinc and used as calibration standards for laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis of bone tissue. The analytical performance of these standards was studied and validated at different step sizes using NIST SRM 1486 Bone Meal. The effect of matrix-matched calibration was assessed by comparing the calibration with BN and HC standards, which incorporate both inorganic and organic components of bone, to that of HA standards. HC standards were found to be more homogenous (RSD < 10%) and provide a linear calibration with better accuracy (R2 > 0.994) compared to other standards. The limits of detection for HC at a 15 μm step size were determined to be 0.24 and 0.012 μg g-1 for zinc and tungsten, respectively. Using this approach, we quantitatively measured zinc and tungsten deposits in the femoral bone of a mouse exposed to 15 μg mL-1 tungsten for four weeks. Localized concentrations of zinc (942 μg g-1) and tungsten (15.7 μg g-1) at selected regions of enrichment were substantially higher than indicated by bulk measurements of these metals.
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Affiliation(s)
- Cassidy R VanderSchee
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
- Department of Chemistry, The King's University, Edmonton, T6H 2H3, Canada
| | - David Frier
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - David Kuter
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Koren K Mann
- Lady Davis Institute for Medical Research, Gerald Bronfman Department of Oncology, McGill University, 3755 Cote Ste Catherine Rd, Montreal, H3T 1E2 Canada
| | - Brian P Jackson
- Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, USA
| | - D Scott Bohle
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
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Miller K, McVeigh CM, Barr EB, Herbert GW, Jacquez Q, Hunter R, Medina S, Lucas SN, Ali AMS, Campen MJ, Bolt AM. Inhalation of tungsten metal particulates alters the lung and bone microenvironments following acute exposure. Toxicol Sci 2021; 184:286-299. [PMID: 34498067 DOI: 10.1093/toxsci/kfab109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Inhalation of tungsten particulates is a relevant route of exposure in occupational and military settings. Exposure to tungsten alloys is associated with increased incidence of lung pathologies, including interstitial lung disease and cancer. We have demonstrated, oral exposure to soluble tungsten enhances breast cancer metastasis to the lungs through changes in the surrounding microenvironment. However, more research is required to investigate if changes in the lung microenvironment, following tungsten particulate exposure, can drive tumorigenesis or metastasis to the lung niche. This study examined if inhalation to environmentally relevant concentrations of tungsten particulates caused acute damage to the microenvironment in the lungs and/or systemically using a whole-body inhalation system. Twenty-four female BALB/c mice were exposed to Filtered Air, 0.60 mg/m3, or 1.7 mg/m3 tungsten particulates (< 1 µm) for 4 h. Tissue samples were collected at day 1 and 7 post-exposure. Tungsten accumulation in the lungs persisted up to 7 days post-exposure and produced acute changes to the lung microenvironment including increased macrophage and neutrophil infiltration, increased levels of pro-inflammatory cytokines IL-1β and CXCL1, and an increased percentage of activated fibroblasts (α-SMA+). Exposure to tungsten also resulted in systemic effects on the bone, including tungsten deposition and transient increases in gene expression of pro-inflammatory cytokines. Taken together, acute whole-body inhalation of tungsten particulates, at levels commonly observed in occupational and military settings, resulted in changes to the lung and bone microenvironments that may promote tumorigenesis or metastasis and be important molecular drivers of other tungsten-associated lung pathologies such as interstitial lung disease.
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Affiliation(s)
- Kara Miller
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
| | - Charlotte M McVeigh
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
| | - Edward B Barr
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
| | - Guy W Herbert
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
| | - Quiteria Jacquez
- College of Nursing, University of New Mexico, Albuquerque, NM, 87131
| | - Russell Hunter
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
| | - Sebastian Medina
- Department of Biology, New Mexico Highlands University, Las Vegas, NM, 87701
| | - Selita N Lucas
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
| | - Abdul-Mehdi S Ali
- Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, 87131
| | - Matthew J Campen
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
| | - Alicia M Bolt
- College of Pharmacy, Department of Pharmaceutical Sciences, The University of New Mexico, Albuquerque, NM 87131
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Chou H, Grant MP, Bolt AM, Guilbert C, Plourde D, Mwale F, Mann KK. Tungsten Increases Sex-Specific Osteoclast Differentiation in Murine Bone. Toxicol Sci 2021; 179:135-146. [PMID: 33146397 PMCID: PMC7797767 DOI: 10.1093/toxsci/kfaa165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Tungsten is a naturally occurring metal that is increasingly used in industry and medical devices, and is labeled as an emerging environmental contaminant. Like many metals, tungsten accumulates in bone. Our previous data indicate that tungsten decreases differentiation of osteoblasts, bone-forming cells. Herein, we explored the impact of tungsten on osteoclast differentiation, which function in bone resorption. We observed significantly elevated osteoclast numbers in the trabecular bone of femurs following oral exposure to tungsten in male, but not female mice. In order to explore the mechanism(s) by which tungsten increases osteoclast number, we utilized in vitro murine primary and cell line pre-osteoclast models. Although tungsten did not alter the adhesion of osteoclasts to the extracellular matrix protein, vitronectin, we did observe that tungsten enhanced RANKL-induced differentiation into tartrate-resistant acid phosphatase (TRAP)-positive mononucleated osteoclasts. Importantly, tungsten alone had no effect on differentiation or on the number of multinucleated TRAP-positive osteoclasts. Enhanced RANKL-induced differentiation correlated with increased gene expression of differentiated osteoclast markers Nfatc1, Acp5, and Ctsk. Although tungsten did not alter the RANK surface receptor expression, it did modulate its downstream signaling. Co-exposure of tungsten and RANKL resulted in sustained positive p38 signaling. These findings demonstrate that tungsten enhances sex-specific osteoclast differentiation, and together with previous findings of decreased osteoblastogenesis, implicate tungsten as a modulator of bone homeostasis.
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Affiliation(s)
- Hsiang Chou
- Division of Experimental Medicine, McGill University, Montreal, Quebec H4A 3J1, Canada
| | - Michael P Grant
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec H3T 1E2, Canada
| | - Alicia M Bolt
- College of Pharmacy, Department of Pharmaceutical Sciences, University of New Mexico, Albuquerque 87131, New Mexico
| | - Cynthia Guilbert
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec H3T 1E2, Canada
| | - Dany Plourde
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec H3T 1E2, Canada
| | - Fackson Mwale
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec H3T 1E2, Canada
- Department of Experimental Surgery, McGill University, Montreal, Quebec H3G 1A4, Canada
| | - Koren K Mann
- Division of Experimental Medicine, McGill University, Montreal, Quebec H4A 3J1, Canada
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec H3T 1E2, Canada
- Gerald Bronfman Department of Oncology, McGill University, Montreal, Quebec H4A 3T2, Canada
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VanderSchee CR, Kuter D, Chou H, Jackson BP, Mann KK, Bohle DS. Addressing K/L-edge overlap in elemental analysis from micro-X-ray fluorescence: bioimaging of tungsten and zinc in bone tissue using synchrotron radiation and laser ablation inductively coupled plasma mass spectrometry. Anal Bioanal Chem 2019; 412:259-265. [PMID: 31776641 DOI: 10.1007/s00216-019-02244-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 10/01/2019] [Accepted: 10/28/2019] [Indexed: 01/21/2023]
Abstract
Synchrotron radiation micro-X-ray fluorescence (SR-μXRF) is a powerful elemental mapping technique that has been used to map tungsten and zinc distribution in bone tissue. However, the heterogeneity of the bone samples along with overlap of the tungsten L-edge with the zinc K-edge signals complicates SR-μXRF data analysis, introduces minor artefacts into the resulting element maps, and decreases image sensitivity and resolution. To confirm and more carefully delineate these SR-μXRF results, we have employed laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to untangle the problem created by the K/L-edge overlap of the tungsten/zinc pair. While the overall elemental distribution results are consistent between the two techniques, LA-ICP-MS provides significantly higher sensitivity and image resolution compared with SR-μXRF measurements in bone. These improvements reveal tissue-specific distribution patterns of tungsten and zinc in bone, not observed using SR-μXRF. We conclude that probing elemental distribution in bone is best achieved using LA-ICP-MS, though SR-μXRF retains the advantage of being a non-destructive method with the capability of being paired with X-ray techniques, which determine speciation in situ. Since tungsten is an emerging contaminant recently found to accumulate in bone, accurately determining its distribution and speciation in situ is essential for directing toxicological studies and informing treatment regimes. Graphical abstract Tungsten and zinc localization and uptake in mouse femurs were imaged by synchrotron radiation, left, and by laser ablation ICP-MS, right. The increased resolution of the LA-ICP-MS technique resolves the problem of the overlap in tungsten's L-edge and zinc's K-edge.
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Affiliation(s)
| | - David Kuter
- Department of Chemistry, McGill University, Montreal, H3A0B8, Canada
| | - Hsiang Chou
- Lady Davis Institute for Medical Research, McGill University, 3755 Cote Ste Catherine Rd, Montreal, H3T 1E2, Canada
| | - Brian P Jackson
- Department of Earth Sciences, Dartmouth College, Hanover, NH, 03755, USA
| | - Koren K Mann
- Lady Davis Institute for Medical Research, McGill University, 3755 Cote Ste Catherine Rd, Montreal, H3T 1E2, Canada
| | - D Scott Bohle
- Department of Chemistry, McGill University, Montreal, H3A0B8, Canada.
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