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Tomonaga T, Higashi H, Izumi H, Nishida C, Kawai N, Sato K, Morimoto T, Higashi Y, Yatera K, Morimoto Y. Investigation of pulmonary inflammatory responses following intratracheal instillation of and inhalation exposure to polypropylene microplastics. Part Fibre Toxicol 2024; 21:29. [PMID: 39107780 PMCID: PMC11301944 DOI: 10.1186/s12989-024-00592-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 07/29/2024] [Indexed: 08/10/2024] Open
Abstract
BACKGROUND Microplastics have been detected in the atmosphere as well as in the ocean, and there is concern about their biological effects in the lungs. We conducted a short-term inhalation exposure and intratracheal instillation using rats to evaluate lung disorders related to microplastics. We conducted an inhalation exposure of polypropylene fine powder at a low concentration of 2 mg/m3 and a high concentration of 10 mg/m3 on 8-week-old male Fischer 344 rats for 6 h a day, 5 days a week for 4 weeks. We also conducted an intratracheal instillation of polypropylene at a low dose of 0.2 mg/rat and a high dose of 1.0 mg/rat on 12-week-old male Fischer 344 rats. Rats were dissected from 3 days to 6 months after both exposures, and bronchoalveolar lavage fluid (BALF) and lung tissue were collected to analyze lung inflammation and lung injury. RESULTS Both exposures to polypropylene induced a persistent influx of inflammatory cells and expression of CINC-1, CINC-2, and MPO in BALF from 1 month after exposure. Genetic analysis showed a significant increase in inflammation-related factors for up to 6 months. The low concentration in the inhalation exposure of polypropylene also induced mild lung inflammation. CONCLUSION These findings suggest that inhaled polypropylene, which is a microplastic, induces persistent lung inflammation and has the potential for lung disorder. Exposure to 2 mg/m3 induced inflammatory changes and was thought to be the Lowest Observed Adverse Effect Level (LOAEL) for acute effects of polypropylene. However, considering the concentration of microplastics in a real general environment, the risk of environmental hazards to humans may be low.
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Affiliation(s)
- Taisuke Tomonaga
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan.
| | - Hidenori Higashi
- Department of Environmental Health Engineering, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Hiroto Izumi
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Chinatsu Nishida
- Department of Environmental Health Engineering, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Naoki Kawai
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Kazuma Sato
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Toshiki Morimoto
- Department of Respiratory Medicine, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Yasuyuki Higashi
- Department of Respiratory Medicine, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Kazuhiro Yatera
- Department of Respiratory Medicine, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Yasuo Morimoto
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
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Sato K, Fukui H, Hagiwara Y, Ogawa R, Nishioka A, Numano T, Sugiyama T, Kawabe M, Mera Y, Yoneda T. Difference in carcinogenicities of two different vapor grown carbon fibers with different physicochemical characteristics induced by intratracheal instillation in rats. Part Fibre Toxicol 2023; 20:37. [PMID: 37770972 PMCID: PMC10537556 DOI: 10.1186/s12989-023-00547-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 08/29/2023] [Indexed: 09/30/2023] Open
Abstract
BACKGROUND Carbon fibers are high aspect ratio structures with diameters on the submicron scale. Vapor grown carbon fibers are contained within multi-walled carbon tubes, with VGCF™-H commonly applied as a conductive additive in lithium-ion batteries. However, several multi-walled carbon fibers, including MWNT-7, have been reported to induce lung carcinogenicity in rats. This study investigated the carcinogenic potential of VGCF™-H fibers in F344 rats of both sexes with the vapor grown carbon fibers VGCF™-H and MWNT-7 over 2 years. The carbon fibers were administered to rats by intratracheal instillation at doses of 0, 0.016, 0.08, and 0.4 mg/kg (total doses of 0, 0.128, 0.64, and 3.2 mg/kg) once per week for eight weeks and the rats were observed for up to 2 years after the first instillation. RESULTS Histopathological examination showed the induction of malignant mesothelioma on the pleural cavity with dose-dependent increases observed at 0, 0.128, 0.64, and 3.2 mg/kg in rats of both sexes that were exposed to MWNT-7. On the other hand, only two cases of pleural malignant mesothelioma were observed in the VGCF™-H groups; both rats that received 3.2 mg/kg in male. The animals in the MWNT-7 groups either died or became moribund earlier than those in the VGCF™-H groups, which is thought related to the development of malignant mesothelioma. The survival rates were higher in the VGCF™-H group, and more carbon fibers were observed in the pleural lavage fluid (PLF) of the MWNT-7 groups. These results suggest that malignant mesothelioma is related to the transfer of carbon fibers into the pleural cavity. CONCLUSIONS The intratracheal instillation of MWNT-7 clearly led to carcinogenicity in both male and female rats at all doses. The equivocal evidence for carcinogenic potential that was observed in male rats exposed to VGCF™-H was not seen in the females. The differences in the carcinogenicities of the two types of carbon fibers are thought due to differences in the number of carbon fibers reaching the pleural cavity. The results indicate that the carcinogenic activity of VGCF™-H is lower than that of MWNT-7.
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Affiliation(s)
- Kei Sato
- Chemical Management Department, Resonac Corporation, Tokyo Shiodome Bldg.,1-9-1, Higashi-Shimbashi, Minato-ku, Tokyo, 105-7325, Japan.
| | - Hiroko Fukui
- Chemical Management Department, Resonac Corporation, Tokyo Shiodome Bldg.,1-9-1, Higashi-Shimbashi, Minato-ku, Tokyo, 105-7325, Japan
| | - Yuji Hagiwara
- Chemical Management Department, Resonac Corporation, Tokyo Shiodome Bldg.,1-9-1, Higashi-Shimbashi, Minato-ku, Tokyo, 105-7325, Japan
| | - Ryoji Ogawa
- Chemical Management Department, Resonac Corporation, Tokyo Shiodome Bldg.,1-9-1, Higashi-Shimbashi, Minato-ku, Tokyo, 105-7325, Japan
| | - Ayako Nishioka
- Chemical Management Department, Resonac Corporation, Tokyo Shiodome Bldg.,1-9-1, Higashi-Shimbashi, Minato-ku, Tokyo, 105-7325, Japan
| | - Takamasa Numano
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi, 491-0113, Japan
| | - Taiki Sugiyama
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi, 491-0113, Japan
| | - Mayumi Kawabe
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi, 491-0113, Japan
| | - Yukinori Mera
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi, 491-0113, Japan
| | - Tadashi Yoneda
- Chemical Management Department, Resonac Corporation, Tokyo Shiodome Bldg.,1-9-1, Higashi-Shimbashi, Minato-ku, Tokyo, 105-7325, Japan
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3
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Takeda T, Yamano S, Goto Y, Hirai S, Furukawa Y, Kikuchi Y, Misumi K, Suzuki M, Takanobu K, Senoh H, Saito M, Kondo H, Daghlian G, Hong YK, Yoshimatsu Y, Hirashima M, Kobashi Y, Okamoto K, Kishimoto T, Umeda Y. Dose-response relationship of pulmonary disorders by inhalation exposure to cross-linked water-soluble acrylic acid polymers in F344 rats. Part Fibre Toxicol 2022; 19:27. [PMID: 35395797 PMCID: PMC8994297 DOI: 10.1186/s12989-022-00468-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/30/2022] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND In Japan, six workers handling cross-linked water-soluble acrylic acid polymer (CWAAP) at a chemical plant suffered from lung diseases, including fibrosis, interstitial pneumonia, emphysema, and pneumothorax. We recently demonstrated that inhalation of CWAAP-A, one type of CWAAP, causes pulmonary disorders in rats. It is important to investigate dose-response relationships and recoverability from exposure to CWAAPs for establishing occupational health guidelines, such as setting threshold limit value for CWAAPs in the workplace. METHODS Male and female F344 rats were exposed to 0.3, 1, 3, or 10 mg/m3 CWAAP-A for 6 h/day, 5 days/week for 13 weeks using a whole-body inhalation exposure system. At 1 h, 4 weeks, and 13 weeks after the last exposure the rats were euthanized and blood, bronchoalveolar lavage fluid, and all tissues including lungs and mediastinal lymph nodes were collected and subjected to biological and histopathological analyses. In a second experiment, male rats were pre-treated with clodronate liposome or polymorphonuclear leukocyte-neutralizing antibody to deplete macrophages or neutrophils, respectively, and exposed to CWAAP-A for 6 h/day for 2 days. RESULTS CWAAP-A exposure damaged only the alveoli. The lowest observed adverse effect concentration (LOAEC) was 1 mg/m3 and the no observed adverse effect concentration (NOAEC) was 0.3 mg/m3. Rats of both sexes were able to recover from the tissue damage caused by 13 weeks exposure to 1 mg/m3 CWAAP-A. In contrast, tissue damage caused by exposure to 3 and 10 mg/m3 was irreversible due to the development of interstitial lung lesions. There was a gender difference in the recovery from CWAAP-A induced pulmonary disorders, with females recovering less than males. Finally, acute lung effects caused by CWAAP-A were significantly reduced by depletion of alveolar macrophages. CONCLUSIONS Pulmonary damage caused by inhalation exposure to CWAAP-A was dose-dependent, specific to the lung and lymph nodes, and acute lung damage was ameliorated by depleting macrophages in the lungs. CWAAP-A had both a LOAEC and a NOAEC, and tissue damage caused by exposure to 1 mg/m3 CWAAP-A was reversible: recovery in female rats was less than for males. These findings indicate that concentration limits for CWAAPs in the workplace can be determined.
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Affiliation(s)
- Tomoki Takeda
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan.
| | - Shotaro Yamano
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan.
| | - Yuko Goto
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Shigeyuki Hirai
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Yusuke Furukawa
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Yoshinori Kikuchi
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Kyohei Misumi
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Masaaki Suzuki
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Kenji Takanobu
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Hideki Senoh
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Misae Saito
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - Hitomi Kondo
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
| | - George Daghlian
- Department of Surgery, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Young-Kwon Hong
- Department of Surgery, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Yasuhiro Yoshimatsu
- Division of Pharmacology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, 951-8510, Japan
| | - Masanori Hirashima
- Division of Pharmacology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, 951-8510, Japan
| | - Yoichiro Kobashi
- Department of Pathology, Tenri Hospital, Tenri, Nara, 632-8552, Japan
| | - Kenzo Okamoto
- Department of Pathology, Hokkaido Chuo Rosai Hospital, Japan Organization of Occupational Health and Safety, Iwamizawa, Hokkaido, 068-0004, Japan
| | - Takumi Kishimoto
- Director of Research and Training Center for Asbestos-Related Diseases, Okayama, Okayama, 702-8055, Japan
| | - Yumi Umeda
- Japan Bioassay Research Center, Japan Organization of Occupational Health and Safety, Hadano, Kanagawa, 257-0015, Japan
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4
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Rich TC, Leavesley SJ, Brandon AP, Evans CA, Raju SV, Wagener BM. Phosphodiesterase 4 mediates interleukin-8-induced heterologous desensitization of the β 2 -adrenergic receptor. FASEB J 2021; 35:e21946. [PMID: 34555226 DOI: 10.1096/fj.202002712rr] [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: 12/15/2020] [Revised: 09/01/2021] [Accepted: 09/07/2021] [Indexed: 11/11/2022]
Abstract
Acute respiratory distress syndrome (ARDS) is a life-threatening illness characterized by decreased alveolar-capillary barrier function, pulmonary edema consisting of proteinaceous fluid, and inhibition of net alveolar fluid transport responsible for resolution of pulmonary edema. There is currently no pharmacotherapy that has proven useful to prevent or treat ARDS, and two trials using beta-agonist therapy to treat ARDS demonstrated no effect. Prior studies indicated that IL-8-induced heterologous desensitization of the beta2-adrenergic receptor (β2 -AR) led to decreased beta-agonist-induced mobilization of cyclic adenosine monophosphate (cAMP). Interestingly, phosphodiesterase (PDE) 4 inhibitors have been used in human airway diseases characterized by low intracellular cAMP levels and increases in specific cAMP hydrolyzing activity. Therefore, we hypothesized that PDE4 would mediate IL-8-induced heterologous internalization of the β2 -AR and that PDE4 inhibition would restore beta-agonist-induced functions. We determined that CINC-1 (a functional IL-8 analog in rats) induces internalization of β2 -AR from the cell surface, and arrestin-2, PDE4, and β2 -AR form a complex during this process. Furthermore, we determined that cAMP associated with the plasma membrane was adversely affected by β2 -AR heterologous desensitization. Additionally, we determined that rolipram, a PDE4 inhibitor, reversed CINC-1-induced derangements of cAMP and also caused β2 -AR to successfully recycle back to the cell surface. Finally, we demonstrated that rolipram could reverse CINC-1-mediated inhibition of beta-agonist-induced alveolar fluid clearance in a murine model of trauma-shock. These results indicate that PDE4 plays a role in CINC-1-induced heterologous internalization of the β2 -AR; PDE4 inhibition reverses these effects and may be a useful adjunct in particular ARDS patients.
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Affiliation(s)
- Thomas C Rich
- Department of Pharmacology, University of South Alabama, Mobile, Alabama, USA.,Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA
| | - Silas J Leavesley
- Department of Pharmacology, University of South Alabama, Mobile, Alabama, USA.,Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.,Department of Chemical and Biomolecular Engineering, University of South Alabama, Mobile, Alabama, USA
| | - Angela P Brandon
- Division of Molecular and Translational Biomedicine, Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Cilina A Evans
- Division of Molecular and Translational Biomedicine, Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - S Vamsee Raju
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.,UAB Lung Health Center, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Gregory Fleming James Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Brant M Wagener
- Division of Molecular and Translational Biomedicine, Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Division of Critical Care Medicine, Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, Alabama, USA
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5
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Mazuqueli Pereira EDSB, Basting RT, Abdalla HB, Garcez AS, Napimoga MH, Clemente-Napimoga JT. Photobiomodulation inhibits inflammation in the temporomandibular joint of rats. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2021; 222:112281. [PMID: 34388640 DOI: 10.1016/j.jphotobiol.2021.112281] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 02/07/2023]
Abstract
Photobiomodulation (PBM) has been applied as a non-invasive technique for treating temporomandibular joint symptoms, especially on painful condition's relief, however the anti-inflammatory mechanism underlying the effect of PBM remains uncertain. This study aims to evaluate the mechanisms of action of PBM (808 nm) in a carrageenan-induced inflammation on temporomandibular joint (TMJ) of rats. In this study male Wistar rats were pre-treated with irradiation of a low-power diode laser for 15 s on TMJ (infra-red 808 nm, 100 mW, 50 J/cm2 and 1.5 J) 15 min prior an injection in the temporomandibular joint of carrageenan (100 μg/TMJ). 1 h after the TMJ treatments, the rats were terminally anesthetized for joint cavity wash and periarticular tissues collect. Samples analysis demonstrated that PBM inhibit leukocytes chemotaxis in the TMJ and significantly reduces amounts of TNF-α, IL-1β and CINC-1. In addition, Western blotting analysis demonstrated that PBM significantly decreased the protein levels of P2X3 and P2X7 receptors in the periarticular tissues. On the other hand, PBM was able to increase protein level of IL-10 (anti-inflammatory cytokine). In summary, it is possible to suggest that PBM inhibit inflammatory chemotaxis, modulation the balance of the pro- and anti-inflammatory characteristics of inflammatory cells.
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Affiliation(s)
| | - Rosanna Tarkany Basting
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research - Campinas, SP, Brazil
| | - Henrique Ballassini Abdalla
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research - Campinas, SP, Brazil
| | - Aguinaldo Silva Garcez
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research - Campinas, SP, Brazil
| | - Marcelo Henrique Napimoga
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research - Campinas, SP, Brazil
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6
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Numano T, Sugiyama T, Kawabe M, Mera Y, Ogawa R, Nishioka A, Fukui H, Sato K, Hagiwara Y. Lung toxicity of a vapor-grown carbon fiber in comparison with a multi-walled carbon nanotube in F344 rats. J Toxicol Pathol 2020; 34:57-71. [PMID: 33627945 PMCID: PMC7890169 DOI: 10.1293/tox.2020-0064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 10/21/2020] [Indexed: 12/22/2022] Open
Abstract
Carbon fibers have excellent physicochemical and electrical properties. Vapor-grown
carbon fibers are a type of carbon fibers that have a multi-walled carbon tube structure
with a high aspect ratio. The representative vapor-grown carbon fiber,
VGCFTM-H, is extremely strong and stable and has superior thermal and
electrical conductivity. Because some high-aspect-ratio multi-walled carbon nanotubes
(MWCNTs) have been reported to have toxic and carcinogenic effects in the lungs of
rodents, we performed a 13-week lung toxicity study using VGCFTM-H in
comparison with one of MWCNTs, MWNT-7, in rats. Male and female F344 rats were
intratracheally administered VGCFTM-H at doses of 0.2, 0.4, and 0.8 mg/kg bw or
MWNT-7 at doses of 0.4 and 0.8 mg/kg bw once a week for 8 weeks and then up to week 13
without treatment. The lung burden was equivalent in the VGCFTM-H and MWNT-7
groups; however, the lung weight had increased and the inflammatory and biochemical
parameters in the broncho-alveolar lavage fluid and histopathological parameters,
including inflammatory cell infiltration, alveolar type II cells proliferation, alveolar
fibrosis, pleural fibrosis, lung mesothelium proliferation, and diaphragm fibrosis, were
milder in the VGCFTM-H group than in the MWNT-7 group. In addition, the
proliferating cell nuclear antigen (PCNA)-positive index in the visceral and pleural
mesothelium was significantly higher in the MWNT-7 group than in the controls, but not in
the VGCFTM-H group. Thus, the results of this study indicate that the lung and
pleural toxicities of VGCFTM-H were less than those of MWNT-7.
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Affiliation(s)
- Takamasa Numano
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi 491-0113, Japan
| | - Taiki Sugiyama
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi 491-0113, Japan
| | - Mayumi Kawabe
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi 491-0113, Japan
| | - Yukinori Mera
- DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya-shi, Aichi 491-0113, Japan
| | - Ryoji Ogawa
- Chemicals Assessment & Management Center, Responsible Care Department, Showa Denko K.K., 13-9 Shiba Daimon 1-Chome, Minato-ku, Tokyo 105-8518, Japan
| | - Ayako Nishioka
- Chemicals Assessment & Management Center, Responsible Care Department, Showa Denko K.K., 13-9 Shiba Daimon 1-Chome, Minato-ku, Tokyo 105-8518, Japan
| | - Hiroko Fukui
- Chemicals Assessment & Management Center, Responsible Care Department, Showa Denko K.K., 13-9 Shiba Daimon 1-Chome, Minato-ku, Tokyo 105-8518, Japan
| | - Kei Sato
- Chemicals Assessment & Management Center, Responsible Care Department, Showa Denko K.K., 13-9 Shiba Daimon 1-Chome, Minato-ku, Tokyo 105-8518, Japan
| | - Yuji Hagiwara
- Chemicals Assessment & Management Center, Responsible Care Department, Showa Denko K.K., 13-9 Shiba Daimon 1-Chome, Minato-ku, Tokyo 105-8518, Japan
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7
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Tomonaga T, Izumi H, Oyabu T, Lee BW, Kubo M, Shimada M, Noguchi S, Nishida C, Yatera K, Morimoto Y. Assessment of Cytokine-Induced Neutrophil Chemoattractants as Biomarkers for Prediction of Pulmonary Toxicity of Nanomaterials. NANOMATERIALS 2020; 10:nano10081563. [PMID: 32784876 PMCID: PMC7466583 DOI: 10.3390/nano10081563] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/05/2020] [Accepted: 08/07/2020] [Indexed: 12/28/2022]
Abstract
This work determines whether cytokine-induced neutrophil chemoattractants (CINC)-1, CINC-2 and CINC-3 can be markers for predicting high or low pulmonary toxicity of nanomaterials (NMs). We classified NMs of nickel oxide (NiO) and cerium dioxide (CeO2) into high toxicity and NMs of two types of titanium dioxides (TiO2 (P90 and rutile)) and zinc oxide (ZnO) into low toxicity, and we analyzed previous data of CINCs in bronchoalveolar lavage fluid (BALF) of rats from three days to six months after intratracheal instillation (0.2 and 1.0 mg) and inhalation exposure (0.32–10.4 mg/m3) of materials (NiO, CeO2, TiO2 (P90 and rutile), ZnO NMs and micron-particles of crystalline silica (SiO2)). The concentration of CINC-1 and CINC-2 in BALF had different increase tendency between high and low pulmonary toxicity of NMs and correlated with the other inflammatory markers in BALF. However, CINC-3 increased only slightly in a dose-dependent manner compared with CINC-1 and CINC-2. Analysis of receiver operating characteristics for the toxicity of NMs by CINC-1 and CINC-2 showed the most accuracy of discrimination of the toxicity at one week or one month after exposure and CINC-1 and CINC-2 in BALF following intratracheal instillation of SiO2 as a high toxicity could accurately predict the toxicity at more than one month after exposure. These data suggest that CINC-1 and CINC-2 may be useful biomarkers for the prediction of pulmonary toxicity of NMs relatively early in both intratracheal instillation and inhalation exposure.
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Affiliation(s)
- Taisuke Tomonaga
- Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (H.I.); (T.O.); (B.-W.L.); (Y.M.)
- Correspondence: ; Tel.: +81-93-691-7466
| | - Hiroto Izumi
- Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (H.I.); (T.O.); (B.-W.L.); (Y.M.)
| | - Takako Oyabu
- Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (H.I.); (T.O.); (B.-W.L.); (Y.M.)
| | - Byeong-Woo Lee
- Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (H.I.); (T.O.); (B.-W.L.); (Y.M.)
| | - Masaru Kubo
- Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 4-1 Kagamiyama 1-chome, Higashi-Hiroshima-shi, Hiroshima 739-8527, Japan; (M.K.); (M.S.)
| | - Manabu Shimada
- Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 4-1 Kagamiyama 1-chome, Higashi-Hiroshima-shi, Hiroshima 739-8527, Japan; (M.K.); (M.S.)
| | - Shingo Noguchi
- Department of Respiratory Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (S.N.); (C.N.); (K.Y.)
| | - Chinatsu Nishida
- Department of Respiratory Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (S.N.); (C.N.); (K.Y.)
| | - Kazuhiro Yatera
- Department of Respiratory Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (S.N.); (C.N.); (K.Y.)
| | - Yasuo Morimoto
- Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan; (H.I.); (T.O.); (B.-W.L.); (Y.M.)
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8
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Therapeutic effects of resveratrol in Escherichia coli-induced rat endometritis model. Naunyn Schmiedebergs Arch Pharmacol 2019; 392:1577-1589. [PMID: 31367863 DOI: 10.1007/s00210-019-01696-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 07/12/2019] [Indexed: 12/22/2022]
Abstract
Endometritis is an inflammatory disorder of the endometrial lining of the uterine tissue in postpartum stage. Endometritis mostly progresses subclinically and causes infertility through the disruption of the hormonal balance. It has been shown in many studies that resveratrol has anti-inflammatory and antioxidant properties. However, the possible beneficial effects of resveratrol in endometritis have not been determined yet. The aim of the present study is to evaluate the treatment potential of resveratrol in an experimentally induced endometritis model in rats. Endometritis was induced in 12-week-old female, nonpregnant, Sprague Dawley rats. The animals were divided into six groups: control (NaCl 0.9%) and endometritis (NaCl 0.9%), marbofloxacin + PGF2α, marbofloxacin, marbofloxacin + resveratrol, and resveratrol groups. To induce endometritis, 5 mg/kg/s.c. progesterone was given for 5 days, and then Escherichia coli (50 μl, 1 × 105 cfu/rat) was injected in the right cornu uteri following laparotomy. Sixteen hours after bacterial inoculation, the treatment protocol was applied for 14 days. At the end of the experiment, the total oxidant status (TOS) and total antioxidant status (TAS) were examined spectrophotometrically in uterus tissues. The severity of inflammation in uterus samples and follicular activity in ovarian tissues were histopathologically evaluated. In addition, serum cytokine levels were determined. While TAS in uterine tissue significantly increased in the resveratrol group when compared to that of the other groups (p < 0.05), there was no difference between the groups in TOS (p > 0.05). The inflammation of the endometrium and the numbers of corpus luteum in the endometritis group were highly significant when compared to those of the other groups (p < 0.05). The recovery of inflammation and follicular activity were similar to those of the other groups in resveratrol group. However, it was realized that resveratrol administration reduced serum cytokine levels. According to the results of the current study, resveratrol was found to be effective in the treatment of endometritis with its antioxidant and anti-inflammatory functions.
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9
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Diep JK, Russo TA, Rao GG. Mechanism-Based Disease Progression Model Describing Host-Pathogen Interactions During the Pathogenesis of Acinetobacter baumannii Pneumonia. CPT-PHARMACOMETRICS & SYSTEMS PHARMACOLOGY 2018; 7:507-516. [PMID: 29761668 PMCID: PMC6118322 DOI: 10.1002/psp4.12312] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 05/09/2018] [Indexed: 01/01/2023]
Abstract
The emergence of highly resistant bacteria is a serious threat to global public health. The host immune response is vital for clearing bacteria from the infected host; however, the current drug development paradigm does not take host‐pathogen interactions into consideration. Here, we used a systems‐based approach to develop a quantitative, mechanism‐based disease progression model to describe bacterial dynamics, host immune response, and lung injury in an immunocompetent rat pneumonia model. Previously, Long‐Evans rats were infected with Acinetobacter baumannii (A. baumannii) strain 307‐0294 at five different inocula and total lung bacteria, interleukin‐1beta (IL‐1β), tumor necrosis factor‐α (TNF‐α), cytokine‐induced neutrophil chemoattractant 1 (CINC‐1), neutrophil counts, and albumin were quantified. Model development was conducted in ADAPT5 version 5.0.54 using a pooled approach with maximum likelihood estimation; all data were co‐modeled. The final model characterized host‐pathogen interactions during the natural time course of bacterial pneumonia. Parameters were estimated with good precision. Our expandable model will integrate drug effects to aid in the design of optimized antibiotic regimens.
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Affiliation(s)
- John K Diep
- UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA.,University at Buffalo, State University of New York, Buffalo, New York, USA
| | - Thomas A Russo
- University at Buffalo, State University of New York, Buffalo, New York, USA.,Veterans Administration Western New York Healthcare System, Buffalo, New York, USA
| | - Gauri G Rao
- UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA.,University at Buffalo, State University of New York, Buffalo, New York, USA
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10
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Modulation of early inflammatory response by different balanced and non-balanced colloids and crystalloids in a rodent model of endotoxemia. PLoS One 2014; 9:e93863. [PMID: 24709833 PMCID: PMC3977866 DOI: 10.1371/journal.pone.0093863] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 02/24/2014] [Indexed: 12/29/2022] Open
Abstract
The use of hydroxyethyl starch (HES) in sepsis has been shown to increase mortality and acute kidney injury. However, the knowledge of the exact mechanism by which several fluids, especially starch preparations may impair end-organ function particularly in the kidney, is still missing. The aim of this study was to measure the influence of different crystalloid and colloid fluid compositions on the inflammatory response in the kidney, the liver and the lung using a rodent model of acute endotoxemia. Rats were anesthetized and mechanically ventilated. Lipopolysaccharide (5 mg/kg) was administered intravenously. After one hour crystalloids [lactate-buffered (RLac) or acetate-buffered (RAc)] were infused i.v. (30 ml/kg) in all groups. At 2 hours rats either received different crystalloids (75 ml/kg of RLac or RAc) or colloids (25 ml/kg of HES in saline or HES in RAc or gelatin in saline). Expression of messenger RNA for cytokine-induced neutrophil chemoattractant-1 (CINC-1), monocyte chemotactic protein-1 (MCP-1), necrosis factor α (TNFα) and intercellular adhesion molecule 1 (ICAM-1) was assessed in kidney, liver and lung tissue by real-time PCR after 4 hours. The use of acetate-buffered solutions was associated with a significantly higher expression of CINC-1 and TNFα mRNA in the liver, in the kidney and in the lung. Only marginal effects of gelatin and hydroxyethyl starch on mRNA expression of inflammatory mediators were observed. The study provides evidence that the type of buffering agent of different colloidal and crystalloid solutions might be a crucial factor determining the extent of early end-organ inflammatory response in sepsis.
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11
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Inhibition of proinflammatory cytokines by SCH79797, a selective protease-activated receptor 1 antagonist, protects rat kidney against ischemia-reperfusion injury. Shock 2012; 37:639-44. [PMID: 22592635 DOI: 10.1097/shk.0b013e3182507774] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Renal ischemia-reperfusion injury (I/R) is the most common cause of acute renal failure. It is partially mediated by thrombin as it is attenuated by thrombin inhibition or deletion of its receptor protease-activated receptor 1 (PAR1). However, the role of PAR1 in renal I/R injury needs to be further elucidated. The present study investigated the effect of PAR1 antagonist, SCH79797 (SCH), on renal protection and downstream effectors involved. Male Wistar rats were pretreated with SCH (25 μg/kg i.p.) or vehicle, 15 min before 45 min of clamping of left renal pedicle after right nephrectomy. To investigate the involvement of phosphatidylinositol 3-kinase (PI3K)/Akt, a group of rats was subjected to pretreatment with an inhibitor of PI3K/Akt (LY 29004, 3 mg/kg i.p.) before renal ischemia and SCH treatment. A sham-operated group served as control and received saline. All rats were killed 24 h after reperfusion or sham operation, and blood samples collected and kidney tissues processed either for immunostaining and histological assessment or for biochemical analysis. SCH79797 markedly attenuated kidney damage histologically and by improving serum creatinine. Both plasma and protein expression of P selectin were markedly reduced as well as neutrophil infiltration, cytokine-induced neutrophil chemoattractant 1, and tumor necrosis factor α. These protective effects of blocking PAR1 receptor were abolished by preadministration of LY29004. These results suggest that PAR1 mediates renal I/R injury and that blocking PAR1 using SCH limits renal injury by an anti-inflammatory effect possibly signaling via PI3K/Akt.
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12
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Handa O, Naito Y, Yoshikawa T. Redox biology and gastric carcinogenesis: the role of Helicobacter pylori. Redox Rep 2011; 16:1-7. [PMID: 21605492 PMCID: PMC6837368 DOI: 10.1179/174329211x12968219310756] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Revised: 01/07/2011] [Accepted: 01/08/2011] [Indexed: 12/16/2022] Open
Abstract
Almost half the world's population is infected by Helicobacter pylori (H. pylori). This bacterium increases the production of reactive oxygen species (ROS) and reactive nitrogen species (RNS) in human stomach, and this has been reported to impact upon gastric inflammation and carcinogenesis. However, the precise mechanism by which H. pylori induces gastric carcinogenesis is presently unclear. Although the main source of ROS/RNS production is possibly the host neutrophil, H. pylori itself produces O₂•⁻. Furthermore, its cytotoxin induces ROS production by gastric epithelial cells, which might affect intracellular signal transduction, resulting in gastric carcinogenesis. Excessive ROS production in gastric epithelial cells can cause DNA damage and thus might be involved in gastric carcinogenesis. Understanding the molecular mechanism of H. pylori-induced carcinogenesis is important for developing new strategies against gastric cancer.
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Affiliation(s)
- Osamu Handa
- Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
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13
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Handa O, Naito Y, Yoshikawa T. Helicobacter pylori: a ROS-inducing bacterial species in the stomach. Inflamm Res 2010; 59:997-1003. [PMID: 20820854 DOI: 10.1007/s00011-010-0245-x] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 06/09/2010] [Accepted: 08/22/2010] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Reactive oxygen species (ROS) and reactive nitrogen species (RNS) have been reported to impact gastric inflammation and carcinogenesis. However, the precise mechanism by which Helicobacter pylori induces gastric carcinogenesis is presently unclear. AIM This review focuses on H. pylori-induced ROS/RNS production in the host stomach, and its relationship with gastric carcinogenesis. RESULTS Activated neutrophils are the main source of ROS/RNS production in the H. pylori-infected stomach, but H. pylori itself also produces ROS. In addition, extensive recent studies have revealed that H. pylori-induced ROS production in gastric epithelial cells might affect gastric epithelial cell signal transduction, resulting in gastric carcinogenesis. Excessive ROS/RNS production in the stomach can damage DNA in gastric epithelial cells, implying its involvement in gastric carcinogenesis. CONCLUSION Understanding the molecular mechanism behind H. pylori-induced ROS, and its involvement in gastric carcinogenesis, is important for developing new strategies for gastric cancer chemoprevention.
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Affiliation(s)
- Osamu Handa
- Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kajiicho, Kawaramachidori Hirokouji Agaru, Kamigyou-ku, Kyoto, 602-8566, Japan.
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14
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Kaneko H, Tamura A, Ishii T, Maeda T, Katagiri T, Ishii J, Kubota Y, Suzuki T, Tsuchiya M, Otsuka Y, Yamazaki K, Watanabe M, Tatsuo T. Bacterial translocation in small intestinal ischemia-reperfusion injury and efficacy of Anti-CINC antibody treatment. Eur Surg Res 2007; 39:153-9. [PMID: 17337893 DOI: 10.1159/000100328] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2006] [Accepted: 01/11/2007] [Indexed: 11/19/2022]
Abstract
The involvement of bacterial translocation in small intestinal ischemia-reperfusion injuries and the efficacy of using anti-CINC antibodies for treatment were investigated. A model for ischemia-reperfusion injury of the small intestine was constructed by clamping the supramesenteric artery (for 90 min) in rats. Anti-CINC antibodies and saline were given just before the induction of ischemia in the treatment group and the control group, respectively. Six hours after reperfusion, bacteria were detected in the mesenteric lymph nodes, but the 'bacteria-positive' rate was significantly lower in the treatment group than in the control group. Bacterial cultures and endotoxins in the blood were negative in both groups up to 24 h later. The plasma cytokine levels showed similar variations, although the increases were significantly lower after reperfusion in the treatment group. In addition, the degrees of neutrophil infiltration and mucosal injury were attenuated in the small intestine, and the structure of the liver was maintained. Furthermore, the 1-week survival was improved. These results suggest that bacterial translocation occurred predominantly via the lymphatic system and that anti-CINC antibody treatment exerted a protective effect against small intestinal ischemia-reperfusion injury.
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Affiliation(s)
- H Kaneko
- Department of Surgery, Omori Hospital, Toho University, Tokyo, Japan.
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Tsuboi H, Naito Y, Katada K, Takagi T, Handa O, Kokura S, Ichikawa H, Yoshida N, Tsukada M, Yoshikawa T. Role of the thrombin/protease-activated receptor 1 pathway in intestinal ischemia-reperfusion injury in rats. Am J Physiol Gastrointest Liver Physiol 2007; 292:G678-83. [PMID: 17023547 DOI: 10.1152/ajpgi.00361.2006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
CXC chemokines, including human interleukin-8 and rat cytokine-induced neutrophil chemoattractant-1, play a crucial role in the pathogenesis of intestinal inflammation induced by ischemia-reperfusion (I-R). Thrombin and its specific receptor, protease-activated receptor 1 (PAR1), act as important players in inflammation. However, the association between thrombin activation and chemokine production during I-R has not been well studied. We investigated whether thrombin and PAR1 might be involved in the pathophysiology of intestinal I-R, using an in vivo model. Intestinal damage was induced by clamping the superior mesenteric artery for 30 min followed by reperfusion in male Wistar rats. Thrombin-antithrombin complex was measured as an indicator of thrombin activation. PAR1 expression in the intestine was evaluated by real-time PCR. The severity of the intestinal mucosal injury was evaluated on the distal segment of the ileum by several biochemical markers and histological findings. Reperfusion significantly increased the serum levels of thrombin-antithrombin complex and enhanced PAR1 expression in the intestinal mucosa. The levels of both intraluminal hemoglobin and protein were significantly increased in the I-R group. The mucosal myeloperoxidase activity and expressions and/or productions of cytokine-induced neutrophil chemoattractant-1 and TNF-alpha were significantly increased after I-R. These increases were inhibited by the treatment of rat with antithrombin intravenously before I-R at a dose of 30 U/kg. These results suggest that the thrombin/PAR1 pathway plays an important role in the production of these cytokines during I-R and that antithrombin exerts potent anti-inflammatory effects on this injury via inhibition of proinflammatory cytokines.
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Affiliation(s)
- Hisato Tsuboi
- Department of Inflammation and Immunology, Kyoto Prefectural Univ of Medicine, Kawaramachi-Hirokoji, Kyoto, Japan
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Naito Y, Yoshida N, Yoshikawa T. Esophageal inflammation in gastroesophageal reflux disease (GERD): role of chemokines. Inflamm Regen 2006. [DOI: 10.2492/inflammregen.26.428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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