1
|
Almasri RM, Ladouceur F, Mawad D, Esrafilzadeh D, Firth J, Lehmann T, Poole-Warren LA, Lovell NH, Al Abed A. Emerging trends in the development of flexible optrode arrays for electrophysiology. APL Bioeng 2023; 7:031503. [PMID: 37692375 PMCID: PMC10491464 DOI: 10.1063/5.0153753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 08/08/2023] [Indexed: 09/12/2023] Open
Abstract
Optical-electrode (optrode) arrays use light to modulate excitable biological tissues and/or transduce bioelectrical signals into the optical domain. Light offers several advantages over electrical wiring, including the ability to encode multiple data channels within a single beam. This approach is at the forefront of innovation aimed at increasing spatial resolution and channel count in multichannel electrophysiology systems. This review presents an overview of devices and material systems that utilize light for electrophysiology recording and stimulation. The work focuses on the current and emerging methods and their applications, and provides a detailed discussion of the design and fabrication of flexible arrayed devices. Optrode arrays feature components non-existent in conventional multi-electrode arrays, such as waveguides, optical circuitry, light-emitting diodes, and optoelectronic and light-sensitive functional materials, packaged in planar, penetrating, or endoscopic forms. Often these are combined with dielectric and conductive structures and, less frequently, with multi-functional sensors. While creating flexible optrode arrays is feasible and necessary to minimize tissue-device mechanical mismatch, key factors must be considered for regulatory approval and clinical use. These include the biocompatibility of optical and photonic components. Additionally, material selection should match the operating wavelength of the specific electrophysiology application, minimizing light scattering and optical losses under physiologically induced stresses and strains. Flexible and soft variants of traditionally rigid photonic circuitry for passive optical multiplexing should be developed to advance the field. We evaluate fabrication techniques against these requirements. We foresee a future whereby established telecommunications techniques are engineered into flexible optrode arrays to enable unprecedented large-scale high-resolution electrophysiology systems.
Collapse
Affiliation(s)
- Reem M. Almasri
- Graduate School of Biomedical Engineering, UNSW, Sydney, NSW 2052, Australia
| | | | - Damia Mawad
- School of Materials Science and Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Dorna Esrafilzadeh
- Graduate School of Biomedical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Josiah Firth
- Australian National Fabrication Facility, UNSW, Sydney, NSW 2052, Australia
| | - Torsten Lehmann
- School of Electrical Engineering and Telecommunications, UNSW, Sydney, NSW 2052, Australia
| | | | | | - Amr Al Abed
- Graduate School of Biomedical Engineering, UNSW, Sydney, NSW 2052, Australia
| |
Collapse
|
2
|
Talbot N, Dirks KN, Fan W, Patel H, Costello SB, Brook M, Davy P. Reanalysis of historic elemental speciation filters to investigate the presence of fibrous mineral particles using microscopy techniques. Front Chem 2022; 10:1032624. [DOI: 10.3389/fchem.2022.1032624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022] Open
Abstract
A case is presented for the value of archiving air quality filters to allow for retrospective analysis of emerging contaminants, that is filter constituents not considered to be harmful (and thus not identified or quantified specifically) at the time of collection but subsequently considered to be of interest. As an example, filters from a 20-year historical archive consisting of 16,000 filters from three sites across Auckland are re-examined for the presence of elongated mineral fibres known to be present in rock across the city. Originally collected for the purpose of the source apportionment of particulate matter, 10 filters from each of the three sites were chosen for reanalysis based on their high silica and aluminium content, and thus considered more likely to contain fibre-like particles (FLP). These filters were analysed using various microscopic methods, including phase contrast microscopy (PCM), scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS). The results show that although the commonly used fibrous polytetrafluoroethylene (PTFE) material of the filters may hamper the visual identification of any fibre-like particles under a certain length, their key components are able to be identified using a combination of PCM and SEM when they are of a suitable dimension and have settled in a certain orientation on the filter. In this case, the use of EDS confirmed the silicon content of the fibres and also revealed elemental spectra. Although the exact identification of the mineral fibre is uncertain, the EDS scan is consistent with hazardous zeolites such as erionite, known to be present in the rock found in Auckland. This study highlights the value in maintaining filter archives for the purpose of investigating the historical evolution of emerging atmospheric pollutants.
Collapse
|
3
|
Kuroda A. Recent progress and perspectives on the mechanisms underlying Asbestos toxicity. Genes Environ 2021; 43:46. [PMID: 34641979 PMCID: PMC8507173 DOI: 10.1186/s41021-021-00215-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 09/13/2021] [Indexed: 01/10/2023] Open
Abstract
Most cases of mesothelioma are known to result from exposure to asbestos fibers in the environment or occupational ambient air. The following questions regarding asbestos toxicity remain partially unanswered: (i) why asbestos entering the alveoli during respiration exerts toxicity in the pleura; and (ii) how asbestos causes mesothelioma, even though human mesothelial cells are easily killed upon exposure to asbestos. As for the latter question, it is now thought that the frustrated phagocytosis of asbestos fibers by macrophages prolongs inflammatory responses and gives rise to a “mutagenic microenvironment” around mesothelial cells, resulting in their malignant transformation. Based on epidemiological and genetic studies, a carcinogenic model has been proposed in which BRCA1-associated protein 1 mutations are able to suppress cell death in mesothelial cells and increase genomic instability in the mutagenic microenvironment. This leads to additional mutations, such as CDKN2A [p16], NF2, TP53, LATS2, and SETD2, which are associated with mesothelioma carcinogenesis. Regarding the former question, the receptors involved in the intracellular uptake of asbestos and the mechanism of transfer of inhaled asbestos from the alveoli to the pleura are yet to be elucidated. Further studies using live-cell imaging techniques will be critical to fully understanding the mechanisms underlying asbestos toxicity.
Collapse
Affiliation(s)
- Akio Kuroda
- Unit of Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama, Higashi Hiroshima, Hiroshima, 739-8530, Japan.
| |
Collapse
|
4
|
Lee S, Yamamoto S, Srinivas B, Shimizu Y, Sada N, Yoshitome K, Ito T, Kumagai-Takei N, Nishimura Y, Otsuki T. Increased production of matrix metalloproteinase-7 (MMP-7) by asbestos exposure enhances tissue migration of human regulatory T-like cells. Toxicology 2021; 452:152717. [PMID: 33581214 DOI: 10.1016/j.tox.2021.152717] [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: 10/28/2020] [Revised: 01/11/2021] [Accepted: 02/06/2021] [Indexed: 11/29/2022]
Abstract
The effects of asbestos on immunocompetent cells have been investigated. In particular, attention was paid to regulatory T cell function, which was observed using the HTLV-1 immortalized human polyclonal T cell line MT-2. Exposure to asbestos (approximately more than 25 μg/mL for 1-3 day) induced apoptosis, and we observed an increase in regulatory T cell function and acceleration of the cell cycle with continuous exposure to low concentrations of asbestos (5-10 μg/mL for more than eight months). Furthermore, cDNA microarray analysis in this study revealed that expression of matrix metalloproteinase-7 (MMP-7) was markedly higher in exposed sublines compared to original MT-2 cells. It was determined that MMP-7 had no effect on Treg function, as determined by examination of sublines and by addition of recombinant MMP-7 and neutralizing antibodies or inhibitors of MMP-7. However, when examining melting of the extracellular matrix (an MMP-7-mediated event) or the extent to which the MT-2 parent strain or long-term exposed subline cells pass through a fibronectin-coated filter, more filter passes were observed for the subline. These results suggest that the effect of asbestos fibers on Treg cells results in excessive migration of the tumor microenvironment through hypersecretion of MMP-7 together with an increase in suppressive function and enhancement of cell cycle progression. Therefore, one possible way to prevent the development of asbestos-induced cancer is to reduce the function (including MMP-7 production) or amount of Treg cells by physiologically active substances or food ingredients. Alternatively, it may be possible to invoke immune checkpoint treatments when carcinogenesis occurs.
Collapse
Affiliation(s)
- Suni Lee
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Shoko Yamamoto
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Bandaru Srinivas
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Yurika Shimizu
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan; Department of Pathophysiology-Periodontal Science, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan.
| | - Nagisa Sada
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan; Department of Biophysical Chemistry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, 700-8530, Okayama, Japan.
| | - Kei Yoshitome
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Tatsuo Ito
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Naoko Kumagai-Takei
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Yasumitsu Nishimura
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Takemi Otsuki
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| |
Collapse
|
5
|
The Effects of Asbestos Fibers on Human T Cells. Int J Mol Sci 2020; 21:ijms21196987. [PMID: 32977478 PMCID: PMC7584019 DOI: 10.3390/ijms21196987] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/14/2020] [Accepted: 09/22/2020] [Indexed: 01/20/2023] Open
Abstract
Asbestos exposure causes malignant tumors such as lung cancer and malignant mesothelioma. The effects of asbestos fibers on immunocompetent cells, however, have not been well studied. Asbestos physically comprises a fibrous substance, which differs from silica particles which are a particulate substance, although chemically it is a mineral silicate. Since silicosis patients previously exposed to silica particles often suffer from lung and autoimmune diseases, it is clear that silica exposure impairs immune tolerance. Similarly, asbestos may alter the immune system in asbestos-exposed individuals. Given that malignant tumors can result following exposure to asbestos, the attenuation of anti-tumor immunity in cases of asbestos exposure is an important area of investigation. We observed the effect of asbestos fibers on T lymphocytes, such as CD8+ cytotoxic T lymphocytes (CTLs), CD4+ helper T (Th), and regulatory T (Treg) cells, and showed that anti-tumor immunity was attenuated, as demonstrated in a system that stimulates fresh cells isolated from peripheral blood in vitro and a system that is continuously exposed to a cell line. In this manuscript, we introduce the experiments and results of studies on CTLs, as well as Th and Treg cells, and discuss how future changes in immunocompetent cells induced by asbestos fibers can be clinically linked.
Collapse
|
6
|
GUO X, LIU G, XIE X, LI J, HOU Z, GU Y, YU L. Expressions of CD23, IL-17 and MMP-9 in Patients with Colorectal Cancer. IRANIAN JOURNAL OF PUBLIC HEALTH 2020; 49:257-266. [PMID: 32461933 PMCID: PMC7231695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND We aimed to detect IL-17, MMP-9 and CD23 in serum of patients with colorectal cancer to provide some proper references for diagnosis and treatment of this disease. METHODS Overall, 287 patients with colorectal cancer were collected in the Digestive Surgery Department of Chinese PLA General Hospital, Beijing, China from January 2017 to November 2018 and were used as the study group, meanwhile, 200 people who took physical examination in the same period were used as the control group. They were retrospectively analyzed. The concentrations of IL-17, MMP-9 and CD23 in serum were detected by ELISA 10 d before and after treatment and 30 d after treatment. The relationship between IL-17, MMP-9 and CD23 concentration and clinicopathology was analyzed. RESULTS The concentrations of CD23, IL-17 and MMP-9 in peripheral blood of the patients in the study group were significantly higher than those in the control group (P<0.001). IL-17, MMP-9 and CD23 were negatively correlated with treatment time and pathological features in the study group (P<0.001). CONCLUSION The concentrations of IL-17, MMP-9 and CD23 obviously increased in peripheral blood of patients with colorectal cancer, the three were negatively correlated with treatment time and were significantly correlated with TNM staging and differentiation degree of colorectal cancer. It is expected to estimate the illness.
Collapse
Affiliation(s)
- Xueguang GUO
- Department of Medical Oncology, Chinese PLA General Hospital, Beijing, China
| | - Gang LIU
- Department of Hepatobiliary & Enteric Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoping XIE
- Department of Gastroenterology Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jing LI
- Department of Oncology, Zhongshan Hospital Affiliated to Guangzhou University of Chinese Medicine, Zhongshan, China
| | - Zehui HOU
- Department of Gastrointestinal and Hernia Surgery, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yanhong GU
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China,Corresponding Author:
| | - Lijiang YU
- Department of Internal Medicine-Oncology, Jingjiang People’s Hospital, Jingjiang, China,Corresponding Author:
| |
Collapse
|
7
|
Abstract
Carbon nanotubes (CNTs) are nanomaterials with unique physicochemical properties that are targets of great interest for industrial and commercial applications. Notwithstanding, some characteristics of CNTs are associated with adverse outcomes from exposure to pathogenic particulates, raising concerns over health risks in exposed workers and consumers. Indeed, certain forms of CNTs induce a range of harmful effects in laboratory animals, among which inflammation, fibrosis, and cancer are consistently observed for some CNTs. Inflammation, fibrosis, and malignancy are complex pathological processes that, in summation, underlie a major portion of human disease. Moreover, the functional interrelationship among them in disease pathogenesis has been increasingly recognized. The CNT-induced adverse effects resemble certain human disease conditions, such as pneumoconiosis, idiopathic pulmonary fibrosis (IPF), and mesothelioma, to some extent. Progress has been made in understanding CNT-induced pathologic conditions in recent years, demonstrating a close interconnection among inflammation, fibrosis, and cancer. Mechanistically, a number of mediators, signaling pathways, and cellular processes are identified as major mechanisms that underlie the interplay among inflammation, fibrosis, and malignancy, and serve as pathogenic bases for these disease conditions in CNT-exposed animals. These studies indicate that CNT-induced pathological effects, in particular, inflammation, fibrosis, and cancer, are mechanistically, and in some cases, causatively, interrelated. These findings generate new insights into CNT adverse effects and pathogenesis and provide new targets for exposure monitoring and drug development against inflammation, fibrosis, and cancer caused by inhaled nanomaterials.
Collapse
Affiliation(s)
- Jie Dong
- Receptor Biology Laboratory, Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention , Morgantown , WV , USA
| | - Qiang Ma
- Receptor Biology Laboratory, Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention , Morgantown , WV , USA
| |
Collapse
|
8
|
Pronin AV, Nikolaeva TN, Deeva AV. Immunological approach to assessing the health of the environment. Russ J Dev Biol 2018. [DOI: 10.1134/s1062360418010046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Pithon MM, Faria LCMD, Tanaka OM, Ruellas ACDO, Primo LSDSG. Sustainability in Orthodontics: what can we do to save our planet? Dental Press J Orthod 2017; 22:113-117. [PMID: 28902257 PMCID: PMC5573018 DOI: 10.1590/2177-6709.22.4.113-117.sar] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 05/18/2017] [Indexed: 12/03/2022] Open
Abstract
The sustainability of the natural resources of our planet is a topic for worldwide debate. Mankind, during its evolution as a species, has not been greatly concerned about conserving the environment in which we live. Nowadays we are reaping the fruits of this neglect. Climatic changes and storms are good examples of this. We, humans, must re-think our attitudes in order to leave the planet in a healthy state to be used by our descendants. But thinking of orthodontics, what can we do as orthodontists? From this perspective, the authors of the present study aimed, in a clear and objective manner, to present simple and sustainable ways to proceed during our activity as orthodontists, in order to minimize the effects on nature, caused by man.
Collapse
Affiliation(s)
- Matheus Melo Pithon
- Universidade Federal do Rio de Janeiro, Programa de Pós-graduação em Odontopediatria e Ortodontia (Rio de Janeiro/RJ, Brasil)
| | - Lucianne Cople Maia de Faria
- Universidade Federal do Rio de Janeiro, Programa de Pós-graduação em Odontopediatria e Ortodontia (Rio de Janeiro/RJ, Brasil)
| | - Orlando Motohiro Tanaka
- Pontifícia Universidade Católica do Paraná, Programa de Pós-graduação em Odontologia com ênfase em Ortodontia e Ortopedia Facial (Curitiba/PR, Brasil)
| | | | | |
Collapse
|
10
|
Matsuzaki H, Kumagai-Takei N, Lee S, Maeda M, Sada N, Hatayama T, Yamamoto S, Ikeda M, Yoshitome K, Min Y, Nishimura Y, Otsuki T. Search for biomarkers of asbestos exposure and asbestos-induced cancers in investigations of the immunological effects of asbestos. Environ Health Prev Med 2017; 22:53. [PMID: 29165150 PMCID: PMC5664581 DOI: 10.1186/s12199-017-0661-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 05/29/2017] [Indexed: 11/25/2022] Open
Abstract
The immunological effects of asbestos exposure on various lymphocytes such as the regulatory T cell (Treg), responder CD4+ T helper cell (Tresp), CD8+ cytotoxic T lymphocytes (CTL), and natural killer (NK) cells were investigated. Results show that asbestos exposure impairs antitumor immunity through enhancement of regulatory T cell function and volume, reduction of CXCR3 chemokine receptor in responder CD4+ T helper cells, and impairment of the killing activities of CD8+ cytotoxic T lymphocytes (CTL) and NK cells. These findings were used to explore biological markers associated with asbestos exposure and asbestos-induced cancers and suggested the usefulness of serum/plasma IL-10 and TGF-β, surface CXCR3 expression in Tresp, the secreting potential of IFN-γ in Tresp, intracellular perforin level in CTL, and surface expression NKp46 in NK cells. Although other unexplored cytokines in serum/plasma and molecules in these immunological cells, including Th17, should be investigated by experimental procedures in addition to a comprehensive analysis of screening methods, biomarkers based on immunological alterations may be helpful in clinical situations to screen the high-risk population exposed to asbestos and susceptible to asbestos-related cancers such as mesothelioma.
Collapse
Affiliation(s)
- Hidenori Matsuzaki
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Naoko Kumagai-Takei
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Suni Lee
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Megumi Maeda
- Department of Biofunctional Chemistry, Division of Bioscience, Okayama University Graduate School of Natural Science and Technology, 1-1-1 Tsushimanaka, Kita-Ku, Okayama, 700-8530, Japan
| | - Nagisa Sada
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Tamayo Hatayama
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Shoko Yamamoto
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Miho Ikeda
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Kei Yoshitome
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Yu Min
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan.,Department of Occupational Diseases, Zhejiang Academy of Medical Sciences, 182 Tian Mu Shan Road, Zhejiang, 310013, People's Republic of China
| | - Yasumitsu Nishimura
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Takemi Otsuki
- Department of Hygiene, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan.
| |
Collapse
|
11
|
Maeda M, Chen Y, Lee S, Kumagai-Takei N, Yoshitome K, Matsuzaki H, Yamamoto S, Hatayama T, Ikeda M, Nishimura Y, Otsuki T. Induction of IL-17 production from human peripheral blood CD4+ cells by asbestos exposure. Int J Oncol 2017; 50:2024-2032. [PMID: 28498408 DOI: 10.3892/ijo.2017.3991] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 04/27/2017] [Indexed: 11/06/2022] Open
Abstract
We have previously reported that chronic, recurrent and low-dose exposure to asbestos fibers causes a reduction in antitumor immunity. Investigation of natural killer (NK) cells using an in vitro cell line model and comprising in vitro activation using freshly isolated NK cells co-cultured with chrysotile fibers, as well as NK cells derived from asbestos-exposed patients with pleural plaque (PP) or malignant mesothelioma (MM), revealed decreased expression of NK cell activating receptors such as NKG2D, 2B4 and NKp46. An in vitro differentiation and clonal expansion model for CD8+ cytotoxic T lymphocytes (CTLs) showed reduced cytotoxicity with decreased levels of cytotoxic molecules such as granzyme B and perforin, as well as suppressed proliferation of CTLs. Additionally, analysis of T helper cells showed that surface CXCR3, chemokine receptor, and the productive potential of interferon (IFN)γ were reduced following asbestos exposure in an in vitro cell line model and in peripheral CD4+ cells of asbestos-exposed patients. Moreover, experiments revealed that asbestos exposure enhanced regulatory T cell (Treg) function. This study also focused on CXCR3 expression and the Th-17 cell fraction. Following activation with T-cell receptor and co-culture with various concentrations of chrysotile fibers using freshly isolated CD4+ surface CXCR3 positive and negative fractions, the intracellular expression of CXCR3, IFNγ and IL-17 remained unchanged when co-cultured with chrysotile. However, subsequent re-stimulation with phorbol 12-myristate 13-acetate (PMA) and ionomycin resulted in enhanced IL-17 production and expression, particularly in CD4+ surface CXCR3 positive cells. These results indicated that the balance and polarization between Treg and Th-17 fractions play an important role with respect to the immunological effects of asbestos and the associated reduction in antitumor immunity.
Collapse
Affiliation(s)
- Megumi Maeda
- Department of Biofunctional Chemistry, Division of Bioscience, Okayama University Graduate School of Natural Science and Technology, Okayama, Japan
| | - Ying Chen
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
| | - Suni Lee
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
| | | | - Kei Yoshitome
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
| | | | - Shoko Yamamoto
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
| | - Tamayo Hatayama
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
| | - Miho Ikeda
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
| | | | - Takemi Otsuki
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
| |
Collapse
|
12
|
Lee S, Hayashi H, Kumagai-Takei N, Matsuzaki H, Yoshitome K, Nishimura Y, Uragami K, Kusaka M, Yamamoto S, Ikeda M, Hatayama T, Fujimoto W, Otsuki T. Clinical evaluation of CENP-B and Scl-70 autoantibodies in silicosis patients. Exp Ther Med 2017; 13:2616-2622. [PMID: 28587321 PMCID: PMC5450599 DOI: 10.3892/etm.2017.4331] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 03/16/2017] [Indexed: 12/05/2022] Open
Abstract
Silicosis patients (SIL) suffer from respiratory disorders and dysregulation of autoimmunity. Frequent complications such as rheumatoid arthritis, systemic sclerosis (SSc) and vasculitis are known in SIL. Furthermore, we reported previously that some SIL exhibited better respiratory conditions in association with a worse immunological status. In this study, the clinical roles of anti-CENP-B and Scl-70 autoantibodies in SIL were analyzed. The titer index (Log10) of anti-CENP-B autoantibody in SIL was higher than that of healthy volunteers (HV), and that of SSc was higher than those of HV and SIL. This titer index was positively correlated with an assumed immune status of 1 for HV, 2 for SIL, and 3 for SSc. Moreover, although factor analysis revealed that the titer index of the anti-CENP-B autoantibody formed the same factor with the anti-Scl-70 autoantibody, IgG value and age in SIL cases, another extracted factor indicated that the IgA value and anti-Scl-70 antibody were positively related, but anti-CENP-B showed an opposite pattern in the results of the factor analysis. These findings indicated that the titer index of anti-CENP-B autoantibody may be a biomarker for dysregulation in SIL cases. Future clinical follow-up of SIL may therefore require both respiratory and immunological assessment.
Collapse
Affiliation(s)
- Suni Lee
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Hiroaki Hayashi
- Department of Dermatology, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Naoko Kumagai-Takei
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Hidenori Matsuzaki
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Kei Yoshitome
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Yasumitsu Nishimura
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Kozo Uragami
- Hinase Uragami Iin, Bizen, Okayama 701-3204, Japan
| | | | - Shoko Yamamoto
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Miho Ikeda
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Tamayo Hatayama
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Wataru Fujimoto
- Department of Dermatology, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Takemi Otsuki
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| |
Collapse
|
13
|
|
14
|
Lee S, Matsuzaki H, Maeda M, Yamamoto S, Kumagai-Takei N, Hatayama T, Ikeda M, Yoshitome K, Nishimura Y, Otsuki T. Accelerated cell cycle progression of human regulatory T cell-like cell line caused by continuous exposure to asbestos fibers. Int J Oncol 2016; 50:66-74. [PMID: 27878235 PMCID: PMC5182008 DOI: 10.3892/ijo.2016.3776] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/18/2016] [Indexed: 12/12/2022] Open
Abstract
Asbestos exposure causes malignant tumors such as lung cancer and malignant mesothelioma. Based on our hypothesis in which continuous exposure to asbestos of immune cells cause reduction of antitumor immunity, the decrease of natural killer cell killing activity with reduction of NKp46 activating receptor expression, inhibition of cytotoxic T cell clonal expansion, reduced CXCR3 chemokine receptor expression and production of interferon-γ production in CD4+ T cells were reported using cell line models, freshly isolated peripheral blood immune cells from health donors as well as asbestos exposed patients such as pleural plaque and mesothelioma. In addition to these findings, regulatory T cells (Treg) showed enhanced function through cell-cell contact and increased secretion of typical soluble factors, interleukin (IL)-10 and transforming growth factor (TGF)-β, in a cell line model using the MT-2 human polyclonal T cells and its sublines exposed continuously to asbestos fibers. Since these sublines showed a remarkable reduction of FoxO1 transcription factor, which regulates various cell cycle regulators in asbestos-exposed sublines, the cell cycle progression in these sublines was examined and compared with that of the original MT-2 cells. Results showed that cyclin D1 expression was markedly enhanced, and various cyclin-dependent kinase-inhibitors were reduced with increased S phases in the sublines. Furthermore, the increase of cyclin D1 expression was regulated by FoxO1. The overall findings indicate that antitumor immunity in asbestos-exposed individuals may be reduced in Treg through changes in the function and volume of Treg.
Collapse
Affiliation(s)
- Suni Lee
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Hidenori Matsuzaki
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Megumi Maeda
- Department of Biofunctional Chemistry, Division of Bioscience, Okayama University Graduate School of Natural Science and Technology, Kita-Ku, Okayama 700-8530, Japan
| | - Shoko Yamamoto
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Naoko Kumagai-Takei
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Tamayo Hatayama
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Miho Ikeda
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Kei Yoshitome
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Yasumitsu Nishimura
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| | - Takemi Otsuki
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan
| |
Collapse
|