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Charrasse S, Poquillon T, Saint-Omer C, Pastore M, Bordignon B, Frye RE, Reynes C, Racine V, Aouacheria A. Quantitative assessment of mitochondrial morphology relevant for studies on cellular health and environmental toxicity. Comput Struct Biotechnol J 2023; 21:5609-5619. [PMID: 38047232 PMCID: PMC10690410 DOI: 10.1016/j.csbj.2023.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023] Open
Abstract
Mitochondria are essential organelles that play crucial roles in cellular energy metabolism, calcium signaling and apoptosis. Their importance in tissue homeostasis and stress responses, combined to their ability to transition between various structural and functional states, make them excellent organelles for monitoring cellular health. Quantitative assessment of mitochondrial morphology can therefore provide valuable insights into environmentally-induced cell damage. High-content screening (HCS) provides a powerful tool for analyzing organelles and cellular substructures. We developed a fully automated and miniaturized HCS wet-plus-dry pipeline (MITOMATICS) exploiting mitochondrial morphology as a marker for monitoring cellular health or damage. MITOMATICS uses an in-house, proprietary software (MitoRadar) to enable fast, exhaustive and cost-effective analysis of mitochondrial morphology and its inherent diversity in live cells. We applied our pipeline and big data analytics software to assess the mitotoxicity of selected chemicals, using the mitochondrial uncoupler CCCP as an internal control. Six different pesticides (inhibiting complexes I, II and III of the mitochondrial respiratory chain) were tested as individual compounds and five other pesticides present locally in Occitanie (Southern France) were assessed in combination to determine acute mitotoxicity. Our results show that the assayed pesticides exhibit specific signatures when used as single compounds or chemical mixtures and that they function synergistically to impact mitochondrial architecture. Study of environment-induced mitochondrial damage has the potential to open new fields in mechanistic toxicology, currently underexplored by regulatory toxicology and exposome research. Such exploration could inform health policy guidelines and foster pharmacological intervention, water, air and soil pollution control and food safety.
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Affiliation(s)
- Sophie Charrasse
- Institut des Sciences de l′Evolution de Montpellier (ISEM, UMR 5554, CNRS/UM/IRD/EPHE), Université de Montpellier, Montpellier, France
| | - Titouan Poquillon
- Institut des Sciences de l′Evolution de Montpellier (ISEM, UMR 5554, CNRS/UM/IRD/EPHE), Université de Montpellier, Montpellier, France
- QuantaCell SAS, Hôpital Saint Eloi, IRMB, 80 avenue Augustin Fliche, 34090 Montpellier, France
| | - Charlotte Saint-Omer
- Institut des Sciences de l′Evolution de Montpellier (ISEM, UMR 5554, CNRS/UM/IRD/EPHE), Université de Montpellier, Montpellier, France
| | - Manuela Pastore
- STATABIO BioCampus, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Benoit Bordignon
- Montpellier Ressources Imagerie, BioCampus, University of Montpellier, CNRS, INSERM, Montpellier, France
| | | | - Christelle Reynes
- STATABIO BioCampus, Univ. Montpellier, CNRS, INSERM, Montpellier, France
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Victor Racine
- QuantaCell SAS, Hôpital Saint Eloi, IRMB, 80 avenue Augustin Fliche, 34090 Montpellier, France
| | - Abdel Aouacheria
- Institut des Sciences de l′Evolution de Montpellier (ISEM, UMR 5554, CNRS/UM/IRD/EPHE), Université de Montpellier, Montpellier, France
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Yap KK, Ismail NH, Supramanian RK, Lim YC. Noise-Related Hearing Disorder Among Vector Control Workers in Kuala Lumpur. Cureus 2023; 15:e46965. [PMID: 38022363 PMCID: PMC10640907 DOI: 10.7759/cureus.46965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Noise-related hearing disorder (NRHD) is the second most common sensorineural hearing loss, right after age-related hearing loss (presbycusis). It is the highest reported occupational disease and a major compensable occupational hazard in Malaysia. With the increase in dengue cases, the need for vector control workers to control the spread of dengue at the expense of being exposed to noisy fogging machines is critical. Methods This was a cross-sectional study of vector control workers conducted by a local authority in Kuala Lumpur. Participants were categorised as either vector control workers who were directly involved in fogging activities or those who were not. A self-administered questionnaire was used to collect sociodemographic, medical and occupational information. NRHD was confirmed by an audiogram test. Results This study found a high prevalence of NRHD among vector control workers exposed to fogging activity (occupational noise hazards), with 51.4% of them experiencing this condition. The predictors of NRHD include fogging status adjusted odds ratio (aOR) 1.94 (95% CI: 1.19 - 3.17), sex 18.28 (95% CI: 2.33 - 143.16) and age 2.03 (95% CI: 1.27 - 3.25). Conclusion The findings of this study imply that vector control workers are at risk of NRHD. The predictors of NRHD are fogging status, sex and age. These findings emphasise the major impact of occupational noise hazards on NRHD and emphasise the importance of addressing this issue to preserve employees' health; especially among male and older employees with chronic noise exposure.
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Affiliation(s)
- Kian Kiong Yap
- Social Preventive Medicine, University Malaya, Kuala Lumpur, MYS
| | | | | | - Yin Cheng Lim
- Social Preventive Medicine, University Malaya, Kuala Lumpur, MYS
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Huang M, Zou M, Mao S, Xu W, Hong Y, Wang H, Gui F, Yang L, Lian F, Chen R. 3,5,6-Trichloro-2-pyridinol confirms ototoxicity in mouse cochlear organotypic cultures and induces cytotoxicity in HEI-OC1 cells. Toxicol Appl Pharmacol 2023; 475:116612. [PMID: 37463651 DOI: 10.1016/j.taap.2023.116612] [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: 03/23/2023] [Revised: 06/12/2023] [Accepted: 06/30/2023] [Indexed: 07/20/2023]
Abstract
The metabolite of organophosphate pesticide chlorpyrifos (CPF), 3,5,6-Trichloro-2-pyridinol (TCP), is persistent and mobile toxic substance in soil and water environments, exhibiting cytotoxic, genotoxic, and neurotoxic properties. However, little is known about its effects on the peripheral auditory system. Herein, we investigated the effects of TCP exposure on mouse postnatal day 3 (P3) cochlear culture and an auditory cell line HEI-OC1 to elucidate the underlying molecular mechanisms of ototoxicity. The damage of TCP to outer hair cells (OHC) and support cells (SC) was observed in a dose and time-dependent manner. OHC and SC were a significant loss from basal to apical turn of the cochlea under exposure over 800 μM TCP for 96 h. As TCP concentrations increased, cell viability was reduced whereas reactive oxygen species (ROS) generation, apoptotic cells, and the extent of DNA damage were increased, accordingly. TCP-induced phosphorylation of the p38 and JNK MAPK are the downstream effectors of ROS. The antioxidant agent, N-acetylcysteine (NAC), could reverse TCP-mediated intracellular ROS generation, inhibit the expressive level of cleaved-caspase 3 and block phosphorylation of p38/JNK. Overall, this is the first demonstration of TCP damaging to peripheral sensory HCs and SC in organotypic cultures from the postnatal cochlea. Data also showed that TCP exposure induced oxidase stress, cell apoptosis and DNA damage in the HEI-OC1 cells. These findings serve as an important reference for assessing the risk of TCP exposure.
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Affiliation(s)
- Mao Huang
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Mingshan Zou
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Shuangshuang Mao
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Wenqi Xu
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Yu Hong
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Haiyan Wang
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Fei Gui
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Lei Yang
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Fuzhi Lian
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China.
| | - Rong Chen
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China.
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