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Voloaca OM, Greenhalgh CJ, Cole LM, Clench MR, Managh AJ, Haywood-Small SL. Laser ablation inductively coupled plasma mass spectrometry as a novel clinical imaging tool to detect asbestos fibres in malignant mesothelioma. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8906. [PMID: 32700418 DOI: 10.1002/rcm.8906] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
RATIONALE Malignant pleural mesothelioma is an extremely aggressive and incurable malignancy associated with prior exposure to asbestos fibres. Difficulties remain in relation to early diagnosis, notably due to impeded identification of asbestos in lung tissue. This study describes a novel laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) imaging approach to identify asbestos within mesothelioma models with clinical significance. METHODS Human mesothelioma cells were exposed to different types of asbestos fibres and prepared on plastic slides for LA-ICP-MS analysis. No further sample preparation was required prior to analysis, which was performed using an NWR Image 266 nm laser ablation system coupled to an Element XR sector-field ICP mass spectrometer, with a lateral resolution of 2 μm. Data was processed using LA-ICP-MS ImageTool v1.7 with the final graphic production made using DPlot software. RESULTS Four different mineral fibres were successfully identified within the mesothelioma samples based on some of the most abundant elements that make up these fibres (Si, Mg and Fe). Using LA-ICP-MS as an imaging tool provided information on the spatial distribution of the fibres at cellular level, which is essential in asbestos detection within tissue samples. Based on the metal counts generated by the different types of asbestos, different fibres can be identified based on shape, size, and elemental composition. Detection of Ca was attempted but requires further optimisation. CONCLUSIONS Detection of asbestos fibres in lung tissues is very useful, if not necessary, to complete the pathological dt9iagnosis of asbestos-related malignancies in the medicolegal field. For the first time, this study demonstrates the successful application of LA-ICP-MS imaging to identify asbestos fibres and other mineral fibres within mesothelioma samples. Ultimately, high-resolution, fast-speed LA-ICP-MS analysis has the potential to be integrated into clinical workflow to aid earlier detection and stratification of mesothelioma patient samples.
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Affiliation(s)
- Oana M Voloaca
- Biomolecular Research Centre, Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK
| | - Calum J Greenhalgh
- Department of Chemistry, Loughborough University, Loughborough, LE11 3TU, UK
| | - Laura M Cole
- Biomolecular Research Centre, Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK
| | - Malcolm R Clench
- Biomolecular Research Centre, Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK
| | - Amy J Managh
- Department of Chemistry, Loughborough University, Loughborough, LE11 3TU, UK
| | - Sarah L Haywood-Small
- Biomolecular Research Centre, Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK
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Nakai K, Endo K, Yoshida F, Koka M, Yamada N, Satoh T, Tsurubuchi T, Matsumura A, Matsumoto Y, Sakurai H. Boron analysis and imaging of cells with 2-hr BPA exposure by using micro-proton particle-induced gamma-ray emission (PIGE). Appl Radiat Isot 2020; 165:109334. [PMID: 32739796 DOI: 10.1016/j.apradiso.2020.109334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 07/05/2020] [Accepted: 07/08/2020] [Indexed: 10/23/2022]
Abstract
Particle-induced gamma-ray emission (PIGE), which measures prompt gamma rays at 428 keV from 10B (p, p'γ) 7Be, was used to confirm the boron distribution within 2hr-BPA-exposed cells. Distribution images of potassium, phosphate, and boron and the whole spectrum showed the ratios of boron counts to total (%) as follows: control group: 1.35 ± 0.073%; 2hr boron exposure group: 2.33 ± 0.35%; and boron exposure/wash group: 1.58 ± 0.095%. Micro-beam PIXE/PIGE can be a promising tool for visualization of intracellular Boron.
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Affiliation(s)
- Kei Nakai
- Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Inashiki, Ibaraki, 300-0331, Japan; Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan; Department of Radiation Oncology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Keita Endo
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Fumiyo Yoshida
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Masashi Koka
- Takasaki Advanced Radiation Research Institute, National Institute for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma, 370-1292, Japan
| | - Naoto Yamada
- Takasaki Advanced Radiation Research Institute, National Institute for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma, 370-1292, Japan
| | - Takahiro Satoh
- Takasaki Advanced Radiation Research Institute, National Institute for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma, 370-1292, Japan
| | - Takao Tsurubuchi
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Akira Matsumura
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoshitaka Matsumoto
- Department of Radiation Oncology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hideyuki Sakurai
- Department of Radiation Oncology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
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Irradiation Facilities of the Takasaki Advanced Radiation Research Institute. QUANTUM BEAM SCIENCE 2017. [DOI: 10.3390/qubs1010002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Koga Y, Satoh T, Kaira K, Koka M, Hisada T, Hirato J, Altan B, Yatomi M, Ono A, Kamide Y, Shimizu Y, Aoki-Saito H, Tsurumaki H, Shimizu K, Mogi A, Ishizuka T, Yamada M, Dobashi K. Elemental and immunohistochemical analysis of the lungs and hilar lymph node in a patient with asbestos exposure, a pilot study. Environ Health Prev Med 2016; 21:492-500. [PMID: 27699693 DOI: 10.1007/s12199-016-0576-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 08/08/2016] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVES Studies have shown that inhaled mine dust, such as asbestos, can be translocated to various organs including the lymph nodes. Recently, we have established a protocol that enables us to identify inhaled elements using paraffin embedded lung specimens by in-air microparticle-induced X-ray emission (micro-PIXE). However, little research has examined the concentration of these inhaled fibers in various organs or the mechanisms of their translocation. In this study, we compared the concentration of inhaled fibers in the lung parenchyma to the concentration in the hilar lymph node as well as to determine the elemental spatial distribution of the inhaled fibers in a patient with occupational asbestos exposure. METHODS Lung tissues and hilar lymph node in a patient with asbestos exposure were used in this study. Elemental analysis was performed by in-air micro-PIXE. Immunohistochemical analysis was performed using anti CD163, smooth muscle actin, vimentin and β-catenin antibody. RESULTS The analysis revealed that the amount of inhaled silicon was approximately 6 times higher in the lymph node than in the lungs. The spatial analysis showed that silicon, iron and aluminium were co-localized in the hilar lymph node. The immunohistochemical analysis showed localized agreement of the inhaled fibers with macrophages, smooth muscle actin, and vimentin in the hilar lymph node. CONCLUSIONS This study showed that in-air micro-PIXE could be useful for analyzing the elemental distribution and quantification of inhaled fibers in the human body. Furthermore, immunohistochemistry in combination with in-air micro-PIXE analyses may help to determine the mechanism of mine dust distribution in vivo.
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Affiliation(s)
- Yasuhiko Koga
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan.
| | - Takahiro Satoh
- Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency, 1233 Watanuki-machi, Takasaki, Gunma, 370-1292, Japan
| | - Kyoichi Kaira
- Department of Oncology Clinical Development, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Masashi Koka
- Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency, 1233 Watanuki-machi, Takasaki, Gunma, 370-1292, Japan
| | - Takeshi Hisada
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Junko Hirato
- Department of Pathology, Gunma University Hospital, 3-39-22 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Bolag Altan
- Department of Oncology Clinical Development, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Masakiyo Yatomi
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiro Ono
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Yosuke Kamide
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan.,Department of Allergy, Sagamihara National Hospital, 18-1 Sakuradai minami-ku, Sagamihara, Kanagawa, 252-0392, Japan
| | - Yasuo Shimizu
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu-machi, Tochigi, 321-0293, Japan
| | - Haruka Aoki-Saito
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroaki Tsurumaki
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Kimihiro Shimizu
- Department of Thoracic Visceral Organ Surgery, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Akira Mogi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Tamotsu Ishizuka
- Third Department of Internal Medicine, Faculty of Medical Sciences, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan
| | - Masanobu Yamada
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi, Maebashi, Gunma, 371-8511, Japan
| | - Kunio Dobashi
- Gunma University Graduate School of Health Sciences, 3-39-22 sho-wa machi, Maebashi, Gunma, 371-8514, Japan.
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Shimizu Y, Dobashi K, Nagase H, Ohta K, Sano T, Matsuzaki S, Ishii Y, Satoh T, Koka M, Yokoyama A, Ohkubo T, Ishii Y, Kamiya T. Co-localization of iron binding on silica with p62/sequestosome1 (SQSTM1) in lung granulomas of mice with acute silicosis. J Clin Biochem Nutr 2014; 56:74-83. [PMID: 25834305 PMCID: PMC4306660 DOI: 10.3164/jcbn.14-44] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 09/02/2014] [Indexed: 01/05/2023] Open
Abstract
The cellular mechanisms involved in the development of silicosis have not been fully elucidated. This study aimed to examine influence of silica-induced lung injury on autophagy. Suspensions of crystalline silica particles were administered transnasally to C57BL/6j mice. Immunohistochemical examination for Fas and p62 protein expression was performed using lung tissue specimens. Two-dimensional and quantitative analysis of silica deposits in the lungs were performed in situ using lung tissue sections by an in-air microparticle induced X-ray emission (in-air micro-PIXE) analysis system, which was based on irrradiation of specimens with a proton ion microbeam. Quantitative analysis showed a significant increase of iron levels on silica particles (assessed as the ratio of Fe relative to Si) on day 56 compared with day 7 (p<0.05). Fas and p62 were expressed by histiocytes in granulomas on day 7, and the expressions persisted for day 56. Fas- and p62-expressing histiocytes were co-localized in granulomas with silica particles that showed an increase of iron levels on silica particles in mouse lungs. Iron complexed with silica induces apoptosis, and may lead to dysregulations of autophagy in histiocytes of granulomas, and these mechanisms may contribute to granuloma development and progression in silicosis.
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Affiliation(s)
- Yasuo Shimizu
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu-machi, Tochigi 321-0293, Japan ; Department of Respiratory Medicine, Maebashi Red Cross Hospital, 3-21-36 Asahi-cho, Maebashi-shi, Tochigi 371-0014, Japan ; Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi-shi, Gunma 371-8511, Japan
| | - Kunio Dobashi
- Gunma University School of Health Sciences, 3-39-22 Showa-machi, Maebashi-shi, Gunma 371-8514, Japan
| | - Hiroyuki Nagase
- Division of Respiratory Medicine and Allergology, Department of Medicine, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Ken Ohta
- Department of Respiratory Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, 3-1-1 Takeoka, Kiyose-shi, Tokyo 204-8585, Japan
| | - Takaaki Sano
- Department of Diagnostic Pathology, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi-shi, Gunma 371-8511, Japan
| | - Shinichi Matsuzaki
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi-shi, Gunma 371-8511, Japan
| | - Yoshiki Ishii
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu-machi, Tochigi 321-0293, Japan
| | - Takahiro Satoh
- Japan Atomic Energy Agency, Takasaki Advanced Radiation Research Institute, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan
| | - Masashi Koka
- Japan Atomic Energy Agency, Takasaki Advanced Radiation Research Institute, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan
| | - Akihito Yokoyama
- Japan Atomic Energy Agency, Takasaki Advanced Radiation Research Institute, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan
| | - Takeru Ohkubo
- Japan Atomic Energy Agency, Takasaki Advanced Radiation Research Institute, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan
| | - Yasuyuki Ishii
- Japan Atomic Energy Agency, Takasaki Advanced Radiation Research Institute, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan
| | - Tomihiro Kamiya
- Japan Atomic Energy Agency, Takasaki Advanced Radiation Research Institute, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan
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Pascolo L, Gianoncelli A, Schneider G, Salomé M, Schneider M, Calligaro C, Kiskinova M, Melato M, Rizzardi C. The interaction of asbestos and iron in lung tissue revealed by synchrotron-based scanning X-ray microscopy. Sci Rep 2013; 3:1123. [PMID: 23350030 PMCID: PMC3553542 DOI: 10.1038/srep01123] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 12/12/2012] [Indexed: 01/24/2023] Open
Abstract
Asbestos is a potent carcinogen associated with malignant mesothelioma and lung cancer but its carcinogenic mechanisms are still poorly understood. Asbestos toxicity is ascribed to its particular physico-chemical characteristics, and one of them is the presence of and ability to adsorb iron, which may cause an alteration of iron homeostasis in the tissue. This observational study reports a combination of advanced synchrotron-based X-ray imaging and micro-spectroscopic methods that provide correlative morphological and chemical information for shedding light on iron mobilization features during asbestos permanence in lung tissue. The results show that the processes responsible for the unusual distribution of iron at different stages of interaction with the fibres also involve calcium, phosphorus and magnesium. It has been confirmed that the dominant iron form present in asbestos bodies is ferritin, while the concurrent presence of haematite suggests alteration of iron chemistry during asbestos body permanence.
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Affiliation(s)
- Lorella Pascolo
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, 34137 Trieste, Italy.
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Shimizu Y, Matsuzaki S, Mori M, Dobashi K. Chronic exposure to particles caused bronchioloalveolar carcinoma in a patient with cryptogenic organizing pneumonia evaluated by elemental analysis. Immunopharmacol Immunotoxicol 2012; 34:170-3. [DOI: 10.3109/08923973.2011.587434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Shimizu Y, Matsuzaki S, Satoh T, Koka M, Yokoyama A, Ohkubo T, Ishii Y, Kamiya T, Fueki M, Mori M, Dobashi K. In-air microparticle induced X-ray emission analysis of particles in interstitial pneumonia lung tissue obtained by transbronchial biopsy. J Clin Biochem Nutr 2011; 49:125-30. [PMID: 21980229 PMCID: PMC3171686 DOI: 10.3164/jcbn.10-127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 01/19/2011] [Indexed: 11/22/2022] Open
Abstract
Interstitial pneumonia develops in association with inhaled particles. In-air microparticle induced X-ray emission (in-air micro) analysis was previously employed to assess the spatial distribution and content of particles in surgical lung biopsy specimens. The aim of this study was to assess the efficacy of in-air micro-analysis for transbronchial lung biopsy specimens in patients with or without occupational exposure. The elements composing lung particles and their locations could be identified by in-air micro-analysis. Silicon was the major component of particles. Quantitative analysis revealed that the elements composing lung particles varied between patients. In a patient with suspected nickel exposure, aluminium, vanadium, and calcium were detected, but was not detected. In a patient without a work history (housewife), various elements were detected. In-air micro-analysis was useful for assessing the spatial distribution and content of particles in specimens from patients. Occupational exposure was not necessarily associated with deposition of particles in the lungs. Therefore, in the diagnosis of, elemental analysis of specimens by in-air micro-analysis could be useful for assessing exposure to particles objectively.
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Affiliation(s)
- Yasuo Shimizu
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
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Shimizu Y, Matsuzaki S, Dobashi K, Yanagitani N, Satoh T, Koka M, Yokoyama A, Ohkubo T, Ishii Y, Kamiya T, Mori M. Elemental analysis of lung tissue particles and intracellular iron content of alveolar macrophages in pulmonary alveolar proteinosis. Respir Res 2011; 12:88. [PMID: 21718529 PMCID: PMC3141423 DOI: 10.1186/1465-9921-12-88] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Accepted: 06/30/2011] [Indexed: 11/29/2022] Open
Abstract
Background Pulmonary alveolar proteinosis (PAP) is a rare disease occurred by idiopathic (autoimmune) or secondary to particle inhalation. The in-air microparticle induced X-ray emission (in-air micro-PIXE) system performs elemental analysis of materials by irradiation with a proton microbeam, and allows visualization of the spatial distribution and quantitation of various elements with very low background noise. The aim of this study was to assess the secondary PAP due to inhalation of harmful particles by employing in-air micro-PIXE analysis for particles and intracellular iron in parafin-embedded lung tissue specimens obtained from a PAP patient comparing with normal lung tissue from a non-PAP patient. The iron inside alveolar macrophages was stained with Berlin blue, and its distribution was compared with that on micro-PIXE images. Results The elements composing particles and their locations in the PAP specimens could be identified by in-air micro-PIXE analysis, with magnesium (Mg), aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), scandium (Sc), potassium (K), calcium (Ca), titanium (Ti), chromium (Cr), copper (Cu), manganase (Mn), iron (Fe), and zinc (Zn) being detected. Si was the major component of the particles. Serial sections stained by Berlin blue revealed accumulation of sideromacrophages that had phagocytosed the particles. The intracellular iron content of alveolar macrophage from the surfactant-rich area in PAP was higher than normal lung tissue in control lung by both in-air micro-PIXE analysis and Berlin blue staining. Conclusion The present study demonstrated the efficacy of in-air micro-PIXE for analyzing the distribution and composition of lung particles. The intracellular iron content of single cells was determined by simultaneous two-dimensional and elemental analysis of paraffin-embedded lung tissue sections. The results suggest that secondary PAP is associated with exposure to inhaled particles and accumulation of iron in alveolar macrophages.
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Affiliation(s)
- Yasuo Shimizu
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan.
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Pascolo L, Gianoncelli A, Kaulich B, Rizzardi C, Schneider M, Bottin C, Polentarutti M, Kiskinova M, Longoni A, Melato M. Synchrotron soft X-ray imaging and fluorescence microscopy reveal novel features of asbestos body morphology and composition in human lung tissues. Part Fibre Toxicol 2011; 8:7. [PMID: 21299853 PMCID: PMC3041679 DOI: 10.1186/1743-8977-8-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Accepted: 02/07/2011] [Indexed: 01/27/2023] Open
Abstract
Background Occupational or environmental exposure to asbestos fibres is associated with pleural and parenchymal lung diseases. A histopathologic hallmark of exposure to asbestos is the presence in lung parenchyma of the so-called asbestos bodies. They are the final product of biomineralization processes resulting in deposition of endogenous iron and organic matter (mainly proteins) around the inhaled asbestos fibres. For shedding light on the formation mechanisms of asbestos bodies it is of fundamental importance to characterize at the same length scales not only their structural morphology and chemical composition but also to correlate them to the possible alterations in the local composition of the surrounding tissues. Here we report the first correlative morphological and chemical characterization of untreated paraffinated histological lung tissue samples with asbestos bodies by means of soft X-ray imaging and X-Ray Fluorescence (XRF) microscopy, which reveals new features in the elemental lateral distribution. Results The X-ray absorption and phase contrast images and the simultaneously monitored XRF maps of tissue samples have revealed the location, distribution and elemental composition of asbestos bodies and associated nanometric structures. The observed specific morphology and differences in the local Si, Fe, O and Mg content provide distinct fingerprints characteristic for the core asbestos fibre and the ferruginous body. The highest Si content is found in the asbestos fibre, while the shell and ferruginous bodies are characterized by strongly increased content of Mg, Fe and O compared to the adjacent tissue. The XRF and SEM-EDX analyses of the extracted asbestos bodies confirmed an enhanced Mg deposition in the organic asbestos coating. Conclusions The present report demonstrates the potential of the advanced synchrotron-based X-ray imaging and microspectroscopy techniques for studying the response of the lung tissue to the presence of asbestos fibres. The new results obtained by simultaneous structural and chemical analysis of tissue specimen have provided clear evidence that Mg, in addition to Fe, is also involved in the formation mechanisms of asbestos bodies. This is the first important step to further thorough investigations that will shed light on the physiopathological role of Mg in tissue response to the asbestos toxicity.
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Affiliation(s)
- Lorella Pascolo
- Sincrotrone Trieste S.C.p.a., Area Science Park, Basovizza, Trieste, Italy.
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Tanaka N, Kimura H, Faried A, Sakai M, Sano A, Inose T, Sohda M, Okada K, Nakajima M, Miyazaki T, Fukuchi M, Kato H, Asao T, Kuwano H, Satoh T, Oikawa M, Kamiya T, Arakawa K. Quantitative analysis of cisplatin sensitivity of human esophageal squamous cancer cell lines using in-air micro-PIXE. Cancer Sci 2010; 101:1487-92. [PMID: 20331629 PMCID: PMC11159837 DOI: 10.1111/j.1349-7006.2010.01542.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 02/09/2010] [Accepted: 02/11/2010] [Indexed: 02/03/2023] Open
Abstract
Cisplatin is a key chemotherapeutic agent for the treatment of esophageal cancer. We examined the intracellular localization of cisplatin in esophageal cancer cell lines and determined their sensitivity to cisplatin using in-air micro-PIXE (particle induced X-ray emission). Two human esophageal squamous cell carcinoma (ESCC) cell lines, TE-2 and TE-13, were examined for their response to cisplatin using MTT assay, flow cytometry, and DNA fragmentation assays. Real-time reverse transcription-polymerase chain reaction was also used to evaluate the mRNA expression of multidrug resistance protein 2 (MRP2) in both cell lines. Platinum localizations of intracellular and intranuclear were measured using in-air micro-PIXE. TE-2 cells were more sensitive to cisplatin than TE-13 cells (IC(50): 37.5 mum and 56.3 mum, respectively). Flow cytometry analysis confirmed that more TE-2 than TE-13 cells were in the sub-G1 phase. DNA fragmentation assay was analyzed to confirm the MTT assay and flow cytometry results. The expression of MRP2 mRNA in TE-13 cells was stronger than in TE-2 cells. In-air micro-PIXE showed that TE-2 cells had higher intracellular cisplatin concentrations than TE-13 cells and the ratio of intranuclear to intracellular cisplatin in individual cells was not significantly different. We observed the intracellular and intranuclear localization of cisplatin using in-air micro-PIXE. The results of this study suggest that in-air micro-PIXE could be a useful quantitative method for evaluating the cisplatin sensitivity of individual cells. Finally, we speculate that MRP2 in the cell membrane may play an important role in regulating the cisplatin sensitivity of ESCC cells.
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Affiliation(s)
- Naritaka Tanaka
- Department of General Surgical Science, Gunma University, Maebashi, Japan.
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