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Fernando PDSM, Piao MJ, Herath HMUL, Kang KA, Hyun CL, Kim ET, Koh YS, Hyun JW. Hyperoside reduced particulate matter 2.5-induced endoplasmic reticulum stress and senescence in skin cells. Toxicol In Vitro 2024; 99:105870. [PMID: 38848825 DOI: 10.1016/j.tiv.2024.105870] [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: 10/30/2023] [Revised: 05/26/2024] [Accepted: 06/04/2024] [Indexed: 06/09/2024]
Abstract
Particulate matter 2.5 (PM2.5) causes skin aging, inflammation, and impaired skin homeostasis. Hyperoside, a flavanol glycoside, has been proposed to reduce the risk of diseases caused by oxidative stress. This study evaluated the cytoprotective potential of hyperoside against PM2.5-induced skin cell damage. Cultured human HaCaT keratinocytes were pretreated with hyperoside and treated with PM2.5. Initially, the cytoprotective and antioxidant ability of hyperoside against PM2.5 was evaluated. Western blotting was further employed to investigate endoplasmic reticulum (ER) stress and cellular senescence and for evaluation of cell cycle regulation-related proteins. Hyperoside inhibited PM2.5-mediated ER stress as well as mitochondrial damage. Colony formation assessment confirmed that PM2.5-impaired cell proliferation was restored by hyperoside. Moreover, hyperoside reduced the activation of PM2.5-induced ER stress-related proteins, such as protein kinase R-like ER kinase, cleaved activating transcription factor 6, and inositol-requiring enzyme 1. Hyperoside promoted cell cycle progression in the G0/G1 phase by upregulating the PM2.5-impaired cell cycle regulatory proteins. Hyperoside significantly reduced the expression of PM2.5-induced senescence-associated β-galactosidase and matrix metalloproteinases (MMPs), such as MMP-1 and MMP-9. Overall, hyperoside ameliorated PM2.5-impaired cell proliferation, ER stress, and cellular senescence, offering potential therapeutic implications for mitigating the adverse effects of environmental pollutants on skin health.
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Affiliation(s)
- Pincha Devage Sameera Madushan Fernando
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea; Department of Biochemistry, College of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Mei Jing Piao
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea; Department of Biochemistry, College of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | | | - Kyoung Ah Kang
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea; Department of Biochemistry, College of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Chang Lim Hyun
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Eui Tae Kim
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Young Sang Koh
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Jin Won Hyun
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea; Department of Biochemistry, College of Medicine, Jeju National University, Jeju 63243, Republic of Korea.
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Anita WM, Uttajug A, Seposo XT, Sudo K, Nakata M, Takemura T, Takano H, Fujiwara T, Ueda K. Interplay of Climate Change and Air Pollution- Projection of the under-5 mortality attributable to ambient particulate matter (PM2.5) in South Asia. ENVIRONMENTAL RESEARCH 2024; 248:118292. [PMID: 38266897 DOI: 10.1016/j.envres.2024.118292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/20/2023] [Accepted: 01/20/2024] [Indexed: 01/26/2024]
Abstract
Ambient fine particulate matter (PM2.5) pollution is a leading health risk factor for children under- 5 years, especially in developing countries. South Asia is a PM2.5 hotspot, where climate change, a potential factor affecting PM2.5 pollution, adds a major challenge. However, limited evidence is available on under-5 mortality attributable to PM2.5 under different climate change scenarios. This study aimed to project under-5 mortality attributable to long-term exposure to ambient PM2.5 under seven air pollution and climate change mitigation scenarios in South Asia. We used a concentration-risk function obtained from a previous review to project under-5 mortality attributable to ambient PM2.5. With a theoretical minimum risk exposure level of 2.4 μg/m3, this risk function was linked to gridded annual PM2.5 concentrations from atmospheric modeling to project under-5 mortality from 2010 to 2049 under different climate change mitigation scenarios. The scenarios were developed from the Aim/Endues global model based on end-of-pipe (removing the emission of air pollutants at the source, EoP) and 2 °C target measures. Our results showed that, in 2010-2014, about 306.8 thousand under-5 deaths attributable to PM2.5 occurred in South Asia under the Reference (business as usual) scenario. The number of deaths was projected to increase in 2045-2049 by 36.6% under the same scenario and 7.7% under the scenario where EoP measures would be partially implemented by developing countries (EoPmid), and was projected to decrease under other scenarios, with the most significant decrease (81.2%) under the scenario where EoP measures would be fully enhanced by all countries along with the measures to achieve 2 °C target (EoPmaxCCSBLD) across South Asia. Country-specific projections of under-5 mortality varied by country. The current emission control strategy would not be sufficient to reduce the number of deaths in South Asia. Robust climate change mitigation and air pollution control policy implementation is required.
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Affiliation(s)
| | - Athicha Uttajug
- Department of Hygiene, Graduate School of Medicine, Hokkaido University, Japan.
| | | | - Kengo Sudo
- Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan.
| | - Makiko Nakata
- Faculty of Applied Sociology Kindai University, Osaka, Japan.
| | - Toshihiko Takemura
- Research Institute for Applied Mechanics, Kyushu University, Kyushu, Japan.
| | - Hirohisa Takano
- Graduate School of Global Environmental Studies, Kyoto University, Japan; Graduate School of Engineering, Kyoto University, Japan.
| | - Taku Fujiwara
- Graduate School of Global Environmental Studies, Kyoto University, Japan; Graduate School of Engineering, Kyoto University, Japan.
| | - Kayo Ueda
- Graduate School of Global Environmental Studies, Kyoto University, Japan; Department of Hygiene, Graduate School of Medicine, Hokkaido University, Japan.
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Kim PR, Park SW, Han YJ, Lee MH, Holsen TM, Jeong CH, Evans G. Variations of oxidative potential of PM 2.5 in a medium-sized residential city in South Korea measured using three different chemical assays. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:171053. [PMID: 38378060 DOI: 10.1016/j.scitotenv.2024.171053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/24/2024] [Accepted: 02/15/2024] [Indexed: 02/22/2024]
Abstract
Although it is evident that PM2.5 has serious adverse health effects, there is no consensus on what the biologically effective dose is. In this study, the intrinsic oxidative potential (OPm) and the extrinsic oxidative potential (OPv) of PM2.5 were measured using three chemical assays including dithiothreitol (DTT), ascorbic acid (AA), and reduced glutathione (GSH), along with chemical compositions of PM2.5 in South Korea. Among the three chemical assays, only OPmAA showed a statistically significant correlation with PM2.5 while OPmGSH and OPmDTT were not correlated with PM2.5 mass concentration. When the samples were categorized by PM2.5 mass concentrations, the variations in the proportion of Ni, As, Mn, Cd, Pb, and Se to PM2.5 mass closely coincided with changes in OPm across all three assays, suggesting a potential association between these elements and PM2.5 OP. Multiple linear regression analysis identified the significant PM components affecting the variability in extrinsic OPv. OPvAA was determined to be significantly influenced by EC, K+, and Ba while OC and Al were common significant factors for OPvGSH and OPvDTT. It was also found that primary OC was an important variable for OPvDTT while secondary OC significantly affected the variability of OPvGSH.
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Affiliation(s)
- Pyung-Rae Kim
- Agriculture and Life Sciences Research Institute, Kangwon National University, Chuncheon, Gangwon-do 24341, Republic of Korea.
| | - Sung-Won Park
- Dept. of Interdisciplinary Graduate Program in Environmental and Biomedical Convergence, Kangwon National University, Chuncheon, Gangwon-do 24341, Republic of Korea.
| | - Young-Ji Han
- Dept. of Environmental Science, Kangwon National University, Chuncheon, Gangwon-do 24341, Republic of Korea; Gangwon particle pollution research and management center, Kangwon National University, Chuncheon, Gangwon-do 24341, Republic of Korea.
| | - Myong-Hwa Lee
- Gangwon particle pollution research and management center, Kangwon National University, Chuncheon, Gangwon-do 24341, Republic of Korea; Dept. of Environmental Engineering, Kangwon National University, Chuncheon, Gangwon-do 24341, Republic of Korea.
| | - Thomas M Holsen
- Dept. of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699, USA.
| | - Cheol-Heon Jeong
- Dept. Of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada.
| | - Greg Evans
- Dept. Of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada.
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