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Li F, Yang R, Lu L, Hua W, Sun Y, Tian M, Lu Y, Huang Q. Comparative steroidogenic effects of hexafluoropropylene oxide trimer acid (HFPO-TA) and perfluorooctanoic acid (PFOA): Regulation of histone modifications. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 350:124030. [PMID: 38663511 DOI: 10.1016/j.envpol.2024.124030] [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: 06/13/2023] [Revised: 03/01/2024] [Accepted: 04/21/2024] [Indexed: 04/30/2024]
Abstract
As a widely used alternative to perfluorooctanoic acid (PFOA), hexafluoropropylene oxide trimer acid (HFPO-TA) has been detected in the environment and humans; however, little is known regarding its male reproductive toxicity. To compare the effects of HFPO-TA on steroid hormone synthesis with PFOA, we exposed Leydig cells (MLTC-1) to non-lethal doses (0.1, 1, and 10 μM) of PFOA and HFPO-TA for 48 h. It was found that the levels of steroid hormones, 17α-hydroxyprogesterone (OHP), androstenedione (ASD), and testosterone (T) were significantly increased in 1 and 10 μM of PFOA and HFPO-TA groups, with greater elevation being observed in the HFPO-TA groups than in the PFOA groups at 10 μM. We further showed that the two rate-limiting steroidogenic genes (Star and Cyp11a1) were up-regulated, while Hsd3b, Cyp17a1, and Hsd17b were down-regulated or unchanged after PFOA/HFPO-TA exposure. Moreover, PFOA exposure significantly up-regulated histone H3K4me1/3 and H3K9me1, while down-regulated H3K4me2 and H3K9me2/3 levels. By contrast, H3K4me2/3 and H3K9me2/3 were enhanced, while H3K4me1 and H3K9me1 were repressed after HFPO-TA treatment. It was further confirmed that H3K4me1/3 were increased and H3K9me2 was decreased in Star and Cyp11a1 promoters by PFOA, while HFPO-TA increased H3K4me2/3 and decreased H3K9me1 in the two gene promoters. Therefore, we propose that low levels of PFOA/HFPO-TA enhance the expression of Star and Cyp11a1 by regulating H3K4 and H3K9 methylation, thus stimulating the production of steroid hormones in MLTC-1 cells. Collectively, HFPO-TA exhibits stronger effects on steroidogenesis compared to PFOA, which may be ascribed to the distinct regulation of histone modifications. These data suggest that HFPO-TA does not appear to be a safer alternative to PFOA on the aspect of male reproductive toxicity.
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Affiliation(s)
- Fuping Li
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Rui Yang
- Center of Reproductive Medicine, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China; Fujian Key Laboratory of Prenatal Diagnosis and Birth Defect, Fuzhou, China
| | - Lu Lu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Weizhen Hua
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Yan Sun
- Center of Reproductive Medicine, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China; Fujian Key Laboratory of Prenatal Diagnosis and Birth Defect, Fuzhou, China
| | - Meiping Tian
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Yanyang Lu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Qingyu Huang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
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Green MP, Shearer C, Patrick R, Kabiri S, Rivers N, Nixon B. The perils of poly- and perfluorinated chemicals on the reproductive health of humans, livestock, and wildlife. Reprod Fertil Dev 2024; 36:RD24034. [PMID: 38744493 DOI: 10.1071/rd24034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 04/10/2024] [Indexed: 05/16/2024] Open
Abstract
Poly- and perfluoroalkyl substances (PFAS) are a prominent class of persistent synthetic compound. The widespread use of these substances in various industrial applications has resulted in their pervasive contamination on a global scale. It is therefore concerning that PFAS have a propensity to accumulate in bodily tissues whereupon they have been linked with a range of adverse health outcomes. Despite this, the true extent of the risk posed by PFAS to humans, domestic animals, and wildlife remains unclear. Addressing these questions requires a multidisciplinary approach, combining the fields of chemistry, biology, and policy to enable meaningful investigation and develop innovative remediation strategies. This article combines the perspectives of chemists, soil scientists, reproductive biologists, and health policy researchers, to contextualise the issue of PFAS contamination and its specific impact on reproductive health. The purpose of this article is to describe the challenges associated with remediating PFAS-contaminated soils and waters and explore the consequences of PFAS contamination on health and reproduction. Furthermore, current actions to promote planetary health and protect ecosystems are presented to instigate positive social change among the scientific community.
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Affiliation(s)
- Mark P Green
- School of BioSciences, Faculty of Science, University of Melbourne, Parkville, Vic. 3010, Australia
| | - Cameron Shearer
- Department of Chemistry, School of Physics, Chemistry and Earth Sciences, Faculty of Sciences, Engineering and Technology, University of Adelaide, SA 5005, Australia
| | - Rebecca Patrick
- School of Health and Social Development, Faculty of Health, Deakin University, Geelong, Vic. 3220, Australia
| | - Shervin Kabiri
- School of Agriculture, Food and Wine, Faculty of Sciences, Engineering and Technology, Glen Osmond, SA 5064, Australia
| | - Nicola Rivers
- Department of Obstetrics and Gynaecology, School of Clinical Sciences, Monash University, Clayton, Vic. 3168, Australia
| | - Brett Nixon
- Hunter Medical Research Institute Research Program in Infertility and Reproduction, New Lambton Heights, NSW 2305, Australia; and School of Environmental and Life Sciences, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia
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Pesonen M, Vähäkangas K. Involvement of per- and polyfluoroalkyl compounds in tumor development. Arch Toxicol 2024; 98:1241-1252. [PMID: 38478087 DOI: 10.1007/s00204-024-03685-7] [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: 11/12/2023] [Accepted: 01/22/2024] [Indexed: 03/27/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are a large group of synthetic persistent chemicals, which are used in many industrial and commercial applications. Hundreds of different PFAS have been identified in the environment and they are commonly found also in human blood. Due to the chemical stability and extensive use, PFAS pose a risk for human health and wildlife. Mounting evidence indicates that PFAS-exposure adversely affects many organs including liver, kidney, and reproductive tissues and induces tumors in laboratory rodents. Epidemiological studies show association between PFAS-exposure and some tumors also in humans. Effects of PFAS-exposure are complex and obviously do not depend only on the concentration and the structure of PFAS, but also on age and sex of the exposed individuals. It has been difficult to show a causal link between PFAS-exposure and tumors. Moreover, molecular mechanisms of the PFAS effects in different tissues are poorly understood. PFAS are not directly mutagenic and they do not induce formation of DNA binding metabolites, and thus are assumed to act more through non-genotoxic mechanisms. In this review, we discuss the involvement of PFAS-compounds in tumor development in tissues where PFAS exposure has been associated with cancer in epidemiological and animal studies (liver, kidney, testicle and breast). We will focus on molecular pathways and mechanisms related to tumor formation following PFAS-exposure.
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Affiliation(s)
- Maija Pesonen
- Faculty of Health Sciences, School of Pharmacy/Toxicology, University of Eastern Finland, P.O. Box 1627, 70211, Kuopio, Finland.
| | - Kirsi Vähäkangas
- Faculty of Health Sciences, School of Pharmacy/Toxicology, University of Eastern Finland, P.O. Box 1627, 70211, Kuopio, Finland
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Zhang D, Hu J, Li H. Perfluorooctanoic acid inhibits androgen biosynthesis in rat immature Leydig cells. ENVIRONMENTAL TOXICOLOGY 2024; 39:1700-1714. [PMID: 38050817 DOI: 10.1002/tox.24042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/22/2023] [Accepted: 11/05/2023] [Indexed: 12/07/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a commonly used short-chain synthetic perfluoroalkyl agent. Immature Leydig cells (ILCs) are localized in the testis and responsible for androgen biosynthesis and metabolism. Although PFOA shows toxicity in the reproductive system, it is not clear if it disrupts the function of ILCs. In the present study, primary ILCs were isolated from 35-day-old rats and exposed to a range of PFOA concentrations (0, 0.01, 0.1, or 1 μM). It was determined that 0.1 or 1 μM PFOA reduced total androgen biosynthesis in ILCs. Specifically, 22R-hydroxycholesterol (22R), and pregnenolone (P5) mediated androgen biosynthesis were reduced by 0.1 μM PFOA. PFOA also selectively downregulated mRNA and protein expressions of steroidogenic enzymes including LHCGR, CYP11A1, 3β-HSD1, and NR5A1 at 0.01, 0.1, or 1 μM. Further analysis revealed that 0.1 μM PFOA inhibited CYP11A1 and 3β-HSD1 enzyme activities. However, PFOA did not significantly affect androgen metabolism and turnover under any of the conditions tested. And PFOA gavaging to 35-day-old rats at 5 or 10 mg/kg for 7 or 14 days also reduced serum androgen levels secreted by ILCs. Moreover, PFOA gavaging also downregulated the mRNA and protein expression levels of LHCGR, CYP11A1, 3β-HSD1, and NR5A1 in vivo. Taken together, these findings suggest that PFOA inhibits androgen biosynthesis in ILCs by selectively targeting key enzymes in the synthesis pathway.
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Affiliation(s)
- Dongxu Zhang
- Department of Urology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Jiasheng Hu
- Department of Urology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Heming Li
- Department of Urology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
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Kabakci R, Clark KL, Plewes MR, Monaco CF, Davis JS. Perfluorooctanoic acid (PFOA) inhibits steroidogenesis and mitochondrial function in bovine granulosa cells in vitro. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 338:122698. [PMID: 37832777 PMCID: PMC10873118 DOI: 10.1016/j.envpol.2023.122698] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 10/03/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a persistent environmental contaminant. Due to the ubiquitous presence of PFOA in the environment, the impacts of PFOA exposure not only affect human reproductive health but may also affect livestock reproductive health. The focus of this study was to determine the effects of PFOA on the physiological functions of bovine granulosa cells in vitro. Primary bovine granulosa cells were exposed to 0, 4, and 40 μM PFOA for 48 and 96 h followed by analysis of granulosa cell function including cell viability, steroidogenesis, and mitochondrial activity. Results revealed that PFOA inhibited steroid hormone secretion and altered the expression of key enzymes required for steroidogenesis. Gene expression analysis revealed decreases in mRNA transcripts for CYP11A1, HSD3B, and CYP19A1 and an increase in STAR expression after PFOA exposure. Similarly, PFOA decreased levels of CYP11A1 and CYP19A1 protein. PFOA did not impact live cell number, alter the cell cycle, or induce apoptosis, although it reduced metabolic activity, indicative of mitochondrial dysfunction. We observed that PFOA treatment caused a loss of mitochondrial membrane potential and increases in PINK protein expression, suggestive of mitophagy and mitochondrial damage. Further analysis revealed that these changes were associated with increased levels of reactive oxygen species. Expression of autophagy related proteins phosphoULK1 and LAMP2 were increased after PFOA exposure, in addition to an increased abundance of lysosomes, characteristic of increased autophagy. Taken together, these findings suggest that PFOA can negatively impact granulosa cell steroidogenesis via mitochondrial dysfunction.
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Affiliation(s)
- Ruhi Kabakci
- Department of Physiology, Faculty of Veterinary Medicine, Kirikkale University, 71450 Yahsihan, Kirikkale, Turkey; Deparment of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Kendra L Clark
- Deparment of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA
| | - Michele R Plewes
- Deparment of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Deparment of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA
| | - Corrine F Monaco
- Deparment of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Nebraska Medical Center, Omaha, NE 68198, USA
| | - John S Davis
- Deparment of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Deparment of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA.
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6
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Wee SY, Aris AZ. Environmental impacts, exposure pathways, and health effects of PFOA and PFOS. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 267:115663. [PMID: 37976959 DOI: 10.1016/j.ecoenv.2023.115663] [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: 07/17/2023] [Revised: 10/22/2023] [Accepted: 11/03/2023] [Indexed: 11/19/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are synthetic chemicals that have been widely utilized in various industries since the 1940s, and have now emerged as environmental contaminants. In recent years, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) have been restricted and replaced with several alternatives. The high persistence, bioaccumulation, and toxicity of these substances have contributed to their emergence as environmental contaminants, and several aspects of their behavior remain largely unknown and require further investigation. The trace level of PFAS makes the development of a monitoring database challenging. Additionally, the potential health issues associated with PFAS are not yet fully understood due to ongoing research and inadequate evidence (experimental and epidemiological studies), especially with regard to the combined effects of exposure to PFAS mixtures and human health risks from drinking water consumption. This in-depth review offers unprecedented insights into the exposure pathways and toxicological impacts of PFAS, addressing critical knowledge gaps in their behaviors and health implications. It presents a comprehensive NABC-Needs, Approach, Benefits, and Challenges-analysis to guide future strategies for the sustainable monitoring and management of these pervasive environmental contaminants.
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Affiliation(s)
- Sze Yee Wee
- Department of Environment, Faculty of Forestry and Environment, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia.
| | - Ahmad Zaharin Aris
- Department of Environment, Faculty of Forestry and Environment, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; International Institute of Aquaculture and Aquatic Sciences, Universiti Putra Malaysia, 71050 Port Dickson, Negeri Sembilan, Malaysia.
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7
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Daugherty S, Mulabagal V, Hayworth J, Akingbemi BT. Legacy and Emerging Perfluoroalkyl and Polyfluoroalkyl Substances Regulate Steroidogenesis in the Male Gonad. Endocrinology 2023; 164:bqad142. [PMID: 37767721 DOI: 10.1210/endocr/bqad142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/08/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023]
Abstract
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are widely used in a variety of industrial processes and manufacturing of consumer products. Current efforts by the manufacturing industry will limit use of long-chain or legacy PFAS represented by perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) and replace with short-chain or emerging PFAS such as perfluorobutanoic acid (PFBA) and perfluorobutane sulfonic acid (PFBS). However, there is little to no information on the toxicity of new and emerging PFAS. Therefore, we performed experiments in growing Long-Evans male rats to investigate effects of low-dose prepubertal and pubertal exposures to PFAS on gonadal steroid hormone secretion. The results demonstrated that both legacy and emerging PFAS have the capacity to regulate testicular steroidogenesis. For instance, prepubertal exposures to PFOS, PFBA, and PFBS increased serum and testicular testosterone concentrations. Exposure to PFBA increased testicular 17β-estradiol (E2) concentrations, and PFOS and PFBS both decreased serum E2 concentrations while stimulating testicular E2 secretion. The data also demonstrated additive effects due to legacy and emerging PFAS mixtures compared with the individual chemicals. The gonadal effects due to PFAS exposures occurred at nanomolar concentrations, which approximate PFAS levels in the environment. Taken together, the present study supports the need for development of cost-effective and sustainable filtration media for different processes to remove PFAS from water and other sources of exposure. Current action by regulatory agencies such as the US Environmental Protection Agency to limit use of PFAS in the manufacture of consumer products will protect public health.
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Affiliation(s)
- Samantha Daugherty
- Department of Anatomy, Physiology and Pharmacology, Auburn University, Auburn AL 36849, USA
| | - Vanisree Mulabagal
- Department of Civil and Environmental Engineering, Auburn University, Auburn AL 36849, USA
| | - Joel Hayworth
- Department of Civil and Environmental Engineering, Auburn University, Auburn AL 36849, USA
| | - Benson T Akingbemi
- Department of Anatomy, Physiology and Pharmacology, Auburn University, Auburn AL 36849, USA
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Wang Z, Zang L, Ren W, Guo H, Sheng N, Zhou X, Guo Y, Dai J. Bile acid metabolism disorder mediates hepatotoxicity of Nafion by-product 2 and perfluorooctane sulfonate in male PPARα-KO mice. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 876:162579. [PMID: 36870486 DOI: 10.1016/j.scitotenv.2023.162579] [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: 12/31/2022] [Revised: 02/25/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Perfluorooctane sulfonate (PFOS) and Nafion by-product 2 (H-PFMO2OSA) induce hepatotoxicity in male mice via activation of the peroxisome proliferator-activated receptor α (PPARα) pathway; however, accumulating evidence suggests that PPARα-independent pathways also play a vital role in hepatotoxicity after exposure to per- and polyfluoroalkyl substances (PFASs). Thus, to assess the hepatotoxicity of PFOS and H-PFMO2OSA more comprehensively, adult male wild-type (WT) and PPARα knockout (PPARα-KO) mice were exposed to PFOS and H-PFMO2OSA (1 or 5 mg/kg/d) for 28 d via oral gavage. Results showed that although elevations in alanine transaminase (ALT) and aspartate aminotransferase (AST) were alleviated in PPARα-KO mice, liver injury, including liver enlargement and necrosis, was still observed after PFOS and H-PFMO2OSA exposure. Liver transcriptome analysis identified fewer differentially expressed genes (DEGs) in the PPARα-KO mice than in the WT mice, but more DEGs associated with the bile acid secretion pathway after PFOS and H-PFMO2OSA treatment. Total bile acid content in the liver was increased in the 1 and 5 mg/kg/d PFOS-exposed and 5 mg/kg/d H-PFMO2OSA-exposed PPARα-KO mice. Furthermore, in PPARα-KO mice, proteins showing changes in transcription and translation levels after PFOS and H-PFMO2OSA exposure were involved in the synthesis, transportation, reabsorption, and excretion of bile acids. Thus, exposure to PFOS and H-PFMO2OSA in male PPARα-KO mice may disturb bile acid metabolism, which is not under the control of PPARα.
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Affiliation(s)
- Zhiru Wang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Lu Zang
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Wanlan Ren
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Hua Guo
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Nan Sheng
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Xuming Zhou
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yong Guo
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jiayin Dai
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China.
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Dunder L, Salihovic S, Lind PM, Elmståhl S, Lind L. Plasma levels of per- and polyfluoroalkyl substances (PFAS) are associated with altered levels of proteins previously linked to inflammation, metabolism and cardiovascular disease. ENVIRONMENT INTERNATIONAL 2023; 177:107979. [PMID: 37285711 DOI: 10.1016/j.envint.2023.107979] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 05/02/2023] [Accepted: 05/11/2023] [Indexed: 06/09/2023]
Abstract
BACKGROUND Per- and polyfluoroalkyl substances (PFAS) have been linked to immunotoxic and cardiometabolic effects in both experimental and epidemiological studies, but with conflicting results. AIM The aim of the present study was to investigate potential associations between plasma PFAS levels and plasma levels of preselected proteomic biomarkers previously linked to inflammation, metabolism and cardiovascular disease. METHODS Three PFAS (perfluorooctane sulfonic acid (PFOS), perfluorooctanoic acid (PFOA) and perfluorohexane sulfonic acid (PFHxS)) were measured by non-targeted metabolomics and 249 proteomic biomarkers were measured by the proximity extension assay (PEA) in plasma from 2,342 individuals within the Epidemiology for Health (EpiHealth) study from Sweden (45-75 years old, 50.6 % men). RESULTS After adjustment for age and sex, 92% of the significant associations between PFOS concentrations and proteins were inverse (p < 0.0002, Bonferroni-adjusted). The results were not as clear for PFOA and PFHxS, but still with 80% and 64 % of the significant associations with proteins being inverse. After adjustment for age, sex, smoking, education, exercise habits and alcohol consumption, levels of epidermal growth factor receptor (EGFR), and paraoxonase type 3 (PON3) remained positively associated with all three PFAS, while resistin (RETN) and urokinase plasminogen activator surface receptor (uPAR) showed inverse associations with all three PFAS. CONCLUSIONS Our findings imply that PFAS exposure is cross-sectionally linked to altered levels of proteins previously linked to inflammation, metabolism and cardiovascular disease in middle-aged humans.
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Affiliation(s)
- Linda Dunder
- Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden.
| | | | - P Monica Lind
- Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden
| | - Sölve Elmståhl
- Division of Geriatric Medicine, Department of Clinical Sciences in Malmö, Lund University, Malmö, Sweden
| | - Lars Lind
- Department of Medical Sciences, Cardiovascular Epidemiology, Uppsala University, Uppsala, Sweden
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Thacharodi A, Hassan S, Hegde TA, Thacharodi DD, Brindhadevi K, Pugazhendhi A. Water a major source of endocrine-disrupting chemicals: An overview on the occurrence, implications on human health and bioremediation strategies. ENVIRONMENTAL RESEARCH 2023; 231:116097. [PMID: 37182827 DOI: 10.1016/j.envres.2023.116097] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/24/2023] [Accepted: 05/09/2023] [Indexed: 05/16/2023]
Abstract
Endocrine disrupting chemicals (EDCs) are toxic compounds that occur naturally or are the output of anthropogenic activities that negatively impact both humans and wildlife. A number of diseases are associated with these disruptors, including reproductive disorders, cardiovascular disorders, kidney disease, neurological disorders, autoimmune disorders, and cancer. Due to their integral role in pharmaceuticals and cosmetics, packaging companies, agro-industries, pesticides, and plasticizers, the scientific awareness on natural and artificial EDCs are increasing. As these xenobiotic compounds tend to bioaccumulate in body tissues and may also persist longer in the environment, the concentrations of these organic compounds may increase far from their original point of concentrations. Water remains as the major sources of how humans and animals are exposed to EDCs. However, these toxic compounds cannot be completely biodegraded nor bioremediated from the aqueous medium with conventional treatment strategies thereby requiring much more efficient strategies to combat EDC contamination. Recently, genetically engineered microorganism, genome editing, and the knowledge of protein and metabolic engineering has revolutionized the field of bioremediation thereby helping to breakdown EDCs effectively. This review shed lights on understanding the importance of aquatic mediums as a source of EDCs exposure. Furthermore, the review sheds light on the consequences of these EDCs on human health as well as highlights the importance of different remediation and bioremediation approaches. Particular attention is paid to the recent trends and perspectives in order to attain sustainable approaches to the bioremediation of EDCs. Additionally, rigorous restrictions to preclude the discharge of estrogenic chemicals into the environment should be followed in efforts to combat EDC pollution.
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Affiliation(s)
- Aswin Thacharodi
- Department of Biochemistry, University of Otago, Dunedin, 9054, New Zealand; Thacharodi's Laboratories, Department of Research and Development, Puducherry, 605005, India
| | - Saqib Hassan
- Future Leaders Mentoring Fellow, American Society for Microbiology, Washington, 20036, USA; Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, 605014, India
| | - Thanushree A Hegde
- Civil Engineering Department, NMAM Institute of Technology, Nitte, Karnataka, 574110, India
| | - Dhanya Dilip Thacharodi
- Thacharodi's Laboratories, Department of Research and Development, Puducherry, 605005, India
| | - Kathirvel Brindhadevi
- Emerging Materials for Energy and Environmental Applications Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Viet Nam
| | - Arivalagan Pugazhendhi
- Emerging Materials for Energy and Environmental Applications Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Viet Nam.
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11
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Han JW, Park HJ. Perfluorooctanoic acid induces cell death in TM3 cells via the ER stress-mitochondrial apoptosis pathway. Reprod Toxicol 2023; 118:108383. [PMID: 37044272 DOI: 10.1016/j.reprotox.2023.108383] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/28/2023] [Accepted: 04/06/2023] [Indexed: 04/14/2023]
Abstract
Perfluorooctanoic acid (PFOA) is an environmentally ubiquitous synthetic chemical highly persistent in organisms. PFOA exposure is pernicious to reproductive health as indicated by reports of male infertility. However, the PFOA toxicity mechanism to Leydig cells remains poorly understood. Therefore, this study aimed to investigate the toxicological events occurring in TM3 Leydig cells treated with PFOA (250, 500, 750µM) for 24h. PFOA was shown to significantly decrease cell viability resulting from inhibition of proliferation and elevation of apoptotic ratio in a dose dependent manner. Upregulation of pro-apoptotic gene expressions such as Bax, Bad, and p53, was observed in combination with an increase in the apoptosis-related protein levels of Bax, cleaved caspase-3, cleaved caspase-8, and phosphorylated p53. Furthermore, exposure of PFOA lead to mitochondrial damage involving mitochondrial membrane permeabilization. A release of cytochrome c and collapse of the mitochondrial membrane potential (∆Ψm) were observed compared to the untreated control. Additionally, PFOA stimulated unfolded protein response (UPR) upregulating ER stress marker, Bip/GRP78, and upregulated protein levels of UPR signal molecules IRE1, p-JNK, p-ERK1/2, p-p53, CHOP, and ERO1. Overall, the present study elucidated the ER stress-mitochondrial apoptosis pathway-related molecular mechanisms involved in PFOA-induced cell death in TM3 Leydig cells.
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Affiliation(s)
- Jong-Won Han
- Department of Stem Cell and Regenerative Biotechnology, KIT, Konkuk University, Seoul 05029, Republic of Korea
| | - Hyun-Jung Park
- Department of Animal Biotechnology, College of Life Science, Sangji University, Wonju-si, 26339, Republic of Korea.
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12
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Perfluorooctanoic acid induces tight junction injury of Sertoli cells by blocking autophagic flux. Food Chem Toxicol 2023; 173:113649. [PMID: 36736878 DOI: 10.1016/j.fct.2023.113649] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/11/2023] [Accepted: 01/31/2023] [Indexed: 02/04/2023]
Abstract
Perfluorooctanoic acid (PFOA), a man-made chemical widely used in consumers, could cause male reproductive toxicity by disrupting blood-testis barrier (BTB) integrity. Autophagy in Sertoli cells is essential for regulation of spermatogenesis and BTB. However, it remains a mystery that whether PFOA-induced BTB injury is associated with autophagy in Sertoli cells. In this study, we found that PFOA dose-dependently disrupted tight junction (TJ) function in Sertoli cells in vivo and in vitro. Furthermore, the results from transmission electron microscopy, Western blot and immunofluorescence analysis revealed that PFOA induced the accumulation of autophagosome in testicular Sertoli cells as well as TM4 cells. Further study confirmed that autophagosome accumulation resulted from the blockage of autophagic degradation because of disruption of autophagosome and lysosome fusion via downregulation of the expression of α-SNAP. In parallel, the overexpressed MMP9 was also observed in vivo and in vitro. Conversely, overexpression of α-SNAP inhibited the expression of MMP9 in TM4 cells. In conclusion, PFOA blocks autophagic flux through downregulating the expression levels of α-SNAP in Sertoli cells, and then induces the accumulation of MMP9 leading to disruption of TJ function. This finding will provide clues for effective prevention and treatment of PFOA-induced male reproductive toxicity.
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13
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Wang H, Wei K, Wu Z, Liu F, Wang D, Peng X, Liu Y, Xu J, Jiang A, Zhang Y. Association between per- and polyfluoroalkyl substances and semen quality. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:27884-27894. [PMID: 36396760 DOI: 10.1007/s11356-022-24182-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Some studies have suggested that perfluoroalkyl and polyfluoroalkyl substance (PFAS) exposure may be associated with semen quality in the general population, but with inconsistent results. To identify a more precise relationship between them, a meta-analysis was performed. We searched Embase, the PubMed, The Cochrane Library, Ovid databases, and Web of Science databases (before March 2022) for appropriate studies on the correlations of PFAS exposure with semen parameters. We extracted β value and 95% confidence intervals (CIs) to conduct meta-analysis. Subgroup analyses was performed by sample size, geographic location, and sample type. A total of seven articles involving 2190 participants were included in this study. The concentrations of perfluorooctanoic acid (PFOA) (β value = - 1.38; 95% CI: - 2.44, - 0.32) and perfluorononanoic acid (PFNA) (β value = - 1.31, 95% CI: - 2.35, - 0.26) were negatively associated with sperm progressive motility. Subgroup analysis revealed that PFNA exposure was related to sperm morphology in studies with the sample size exceeding 200 people (β value = - 0.14; 95% CI: - 0.26, - 0.01). Our study supports that exposure to some PFASs (e.g., PFNA, PFOA) may be associated with semen quality, such as lower sperm progressive motility. Therefore, it is of great significance for the prevention of male infertility by control the use of PFASs.
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Affiliation(s)
- Huanqiang Wang
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Kai Wei
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Zhixin Wu
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Fucun Liu
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Danhua Wang
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Xianzheng Peng
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
- Department of Nursing, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Yongyou Liu
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Jida Xu
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - A'pei Jiang
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
- Department of Nursing, Kangda College of Nanjing Medical University, Lianyungang, 222000, China
| | - Yan Zhang
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 222000, China.
- Department of Nursing, Kangda College of Nanjing Medical University, Lianyungang, 222000, China.
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14
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Sun Z, Wen Y, Wang B, Deng S, Zhang F, Fu Z, Yuan Y, Zhang D. Toxic effects of per- and polyfluoroalkyl substances on sperm: Epidemiological and experimental evidence. Front Endocrinol (Lausanne) 2023; 14:1114463. [PMID: 36891048 PMCID: PMC9986484 DOI: 10.3389/fendo.2023.1114463] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/07/2023] [Indexed: 02/22/2023] Open
Abstract
As emerging organic contaminants, per- and polyfluoroalkyl substances (PFASs) have aroused worldwide concern due to their environmental persistence, ubiquitous presence, bioaccumulation, and potential toxicity. It has been demonstrated that PFASs can accumulate in human body and cause multiple adverse health outcomes. Notably, PFASs have been detected in the semen of human, posing a potential hazard to male fecundity. This article reviews the evidence about the toxic effects of exposure to PFASs on male reproduction, focusing on the sperm quality. Epidemiological studies showed that PFASs, such as perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), were adversely associated with the semen parameters in humans, including sperm count, morphology and motility. Experimental results also confirmed that PFAS exposure led to testicular and epididymal damage, therefore impairing spermatogenesis and sperm quality. The mechanisms of reproductive toxicity of PFASs may be involved in blood-testosterone barrier destruction, testicular apoptosis, testosterone synthesis disorder, and membrane lipid composition alteration, oxidative stress and Ca2+ influx in sperm. In conclusion, this review highlighted the potential threat of exposure to PFASs to human spermatozoa.
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Affiliation(s)
- Zhangbei Sun
- School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Yiqian Wen
- School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Binhui Wang
- School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Shiyi Deng
- School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Fan Zhang
- School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Zhendong Fu
- School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Yangyang Yuan
- Clinical Medical Experimental Center, Nanchang University, Nanchang, China
- Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, China
| | - Dalei Zhang
- School of Basic Medical Sciences, Nanchang University, Nanchang, China
- Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, China
- *Correspondence: Dalei Zhang,
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Guillotin S, Delcourt N. Studying the Impact of Persistent Organic Pollutants Exposure on Human Health by Proteomic Analysis: A Systematic Review. Int J Mol Sci 2022; 23:ijms232214271. [PMID: 36430748 PMCID: PMC9692675 DOI: 10.3390/ijms232214271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 11/19/2022] Open
Abstract
Persistent organic pollutants (POPs) are organic chemical substances that are widely distributed in environments around the globe. POPs accumulate in living organisms and are found at high concentrations in the food chain. Humans are thus continuously exposed to these chemical substances, in which they exert hepatic, reproductive, developmental, behavioral, neurologic, endocrine, cardiovascular, and immunologic adverse health effects. However, considerable information is unknown regarding the mechanism by which POPs exert their adverse effects in humans, as well as the molecular and cellular responses involved. Data are notably lacking concerning the consequences of acute and chronic POP exposure on changes in gene expression, protein profile, and metabolic pathways. We conducted a systematic review to provide a synthesis of knowledge of POPs arising from proteomics-based research. The data source used for this review was PubMed. This study was carried out following the PRISMA guidelines. Of the 742 items originally identified, 89 were considered in the review. This review presents a comprehensive overview of the most recent research and available solutions to explore proteomics datasets to identify new features relevant to human health. Future perspectives in proteomics studies are discussed.
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Affiliation(s)
- Sophie Guillotin
- Poison Control Centre, Toulouse University Hospital, 31059 Toulouse, France
- INSERM UMR 1295, Centre d’Epidémiologie et de Recherche en Santé des Populations, 31000 Toulouse, France
| | - Nicolas Delcourt
- Poison Control Centre, Toulouse University Hospital, 31059 Toulouse, France
- INSERM UMR 1214, Toulouse NeuroImaging Center, 31024 Toulouse, France
- Correspondence: ; Tel.: +33-(0)-567691640
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16
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Luo K, Huang W, Zhang Q, Liu X, Nian M, Wei M, Wang Y, Chen D, Chen X, Zhang J. Environmental exposure to legacy poly/perfluoroalkyl substances, emerging alternatives and isomers and semen quality in men: A mixture analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 833:155158. [PMID: 35421474 DOI: 10.1016/j.scitotenv.2022.155158] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 03/31/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND/OBJECTIVES Multiple studies have examined the relationship between PFAS and semen quality, but none has explored the associations of PFAS mixture that includes emerging alternatives and branched isomers. METHODS 22 PFAS, including 10 linear legacy PFAS, 7 branched isomers, 3 short chain alternatives and 2 components of F53B [e.g., 6:2 chlorinated polyfluorinated ether sulfonate (Cl-PFESA)] were quantified in blood plasma among 740 healthy men. Five semen quality parameters (i.e., volume, count, concentration, total motility and progressive rate) were assessed. Multiple linear regression and three multiple pollutant models (i.e., adaptive elastic net regression, quantile based g-computation, and XGBoost method) were used to assess the associations of individual PFAS and PFAS mixture with semen quality and the potential interactive effects among congeners. RESULTS After adjusting for selected confounders, perfluorobutane sulfonate (PFBS) and perfluorohexane sulfonate (PFHxS) presented significant and negative associations with sperm count [βAENET = -0.09 (95%CI: -0.14, -0.03) for PFBS, and -0.16 (95%CI: -0.25, -0.07) for PFHxS] and sperm concentration [-0.04 (95%CI: -0.08, -0.001) for PFBS and -0.11 (95%CI: -0.17, -0.04) for PFHxS]. 6:2 Cl-PFESA showed negative associations with total motility (-2.33, 95%CI: -3.80, -0.86) and progressive rate (-1.46, 95%CI: -2.79, -0.12). But perfluoroheptanesulfonic acid (PFHpS) was positively associated with sperm count and concentration. These associations were supported by the importance assessment of these four congeners in XGBoost analyses. However, no associations were found between PFAS mixture or branched isomers and semen quality; nor were there significant interactions among PFAS congeners. CONCLUSIONS In the current cross-sectional study, we found that two emerging PFAS replacements (i.e., 6:2 Cl-PFESA and PFBS) and PFHxS exposure were associated with reduced semen concentration, total sperm count and motility in men. Meanwhile, significant positive associations between PFHpS and sperm count and concentration were also observed. But there were no consistent associations between PFAS mixture, branched isomers and semen quality.
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Affiliation(s)
- Kai Luo
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200092, China
| | - Wei Huang
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Qianlong Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200092, China
| | - Xiaotu Liu
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Min Nian
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200092, China; School of Public Health, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Mengdan Wei
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200092, China
| | - Yuqing Wang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200092, China
| | - Da Chen
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Xiangfeng Chen
- Center for Reproductive Medicine, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200135, China.
| | - Jun Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200092, China; School of Public Health, Shanghai Jiao Tong University, Shanghai 200025, China; Hainan Women and Children's Medical Center, Haikou, Hainan 570100, China.
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17
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Wang Z, Yao J, Guo H, Sheng N, Guo Y, Dai J. Comparative Hepatotoxicity of a Novel Perfluoroalkyl Ether Sulfonic Acid, Nafion Byproduct 2 (H-PFMO2OSA), and Legacy Perfluorooctane Sulfonate (PFOS) in Adult Male Mice. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:10183-10192. [PMID: 35786879 DOI: 10.1021/acs.est.2c00957] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nafion byproduct 2 (H-PFMO2OSA) has been detected in the environment, but little is known about its toxicities. To compare the hepatotoxicity of H-PFMO2OSA with legacy perfluorooctane sulfonate (PFOS), male adult mice were exposed to 0.2, 1, or 5 mg/kg/d of each chemical for 28 days. Results showed that, although H-PFMO2OSA liver and serum concentrations were lower than those of PFOS, the relative liver weight in the H-PFMO2OSA groups was significantly higher than that in the corresponding PFOS groups. In addition, the increase in alanine transaminase and aspartate aminotransferase activity was greater in the H-PFMO2OSA groups than in the PFOS groups. Reduced glutathione (GSH) content and glutathione reductase activity in the liver increased in the 1 and 5 mg/kg/d H-PFMO2OSA groups and in the 5 mg/kg/d PFOS group. Liver quantitative proteome analysis demonstrated that, similar to PFOS, H-PFMO2OSA caused lipid metabolism disorder, and most lipid metabolism-related differentially expressed proteins (DEPs) were controlled by peroxisome proliferator-activated receptor alpha (PPARα). Additionally, KEGG enrichment analysis highlighted changes in the GSH metabolism pathway after PFOS and H-PFMO2OSA exposure. Then, there were eight DEPs involved in the GSH metabolism pathway that mostly were upregulated after exposure to H-PFMO2OSA but not after exposure to PFOS. In conclusion, H-PFMO2OSA induced higher levels of liver damage and more serious GSH metabolism dysregulation compared to PFOS.
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Affiliation(s)
- Zhiru Wang
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jingzhi Yao
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Hua Guo
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Nan Sheng
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Yong Guo
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jiayin Dai
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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18
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Luo K, Meng X, Liu X, Nian M, Zhang Q, Tian Y, Chen D, Zhang J. Environmental Exposure to 6:2 Polyfluoroalkyl Phosphate Diester and Impaired Testicular Function in Men. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:8290-8298. [PMID: 35536153 DOI: 10.1021/acs.est.1c07184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
6:2 polyfluoroalkyl phosphate diester (6:2 diPAP) has been demonstrated to disrupt reproductive endocrine functions using experimental studies. However, evidence from humans is not available yet. This cross-sectional study aims to assess the relationship between 6:2 diPAP exposure and the testicular function among adult men. A total of 902 men seeking preconception care were included. Plasma 6:2 diPAP concentrations were determined, while the testicular function was assessed via semen quality and reproductive hormones in serum. The association was assessed by multiple linear regression. Stratified analyses by age and body mass index (BMI) were conducted to assess the potential effect modification by these two variables. Regression analyses revealed that 6:2 diPAP exposure was significantly inversely associated with androgens [i.e., total testosterone (TT) and free androgen index (FAI)], markers of testosterone production potential [i.e., TT/luteinizing hormone (LH) and FAI/LH], estradiol, and insulin-like factor 3, a biomarker of Leydig cell function. These associations were robust in sensitivity analyses. However, age and BMI did not modify these associations, and no association was observed between 6:2 diPAP and semen quality. Our study suggests that exposure to 6:2 diPAP may inhibit androgen synthesis and impair Leydig cell function in adult men.
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Affiliation(s)
- Kai Luo
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
- School of Public Health, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Xi Meng
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Xiaotu Liu
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Min Nian
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
- School of Public Health, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Qianlong Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Ying Tian
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
- School of Public Health, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Da Chen
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Jun Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
- School of Public Health, Shanghai Jiao Tong University, Shanghai 200025, China
- Hainan Women and Children's Medical Center, Haikou, Hainan 570100, China
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19
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Boyd RI, Ahmad S, Singh R, Fazal Z, Prins GS, Madak Erdogan Z, Irudayaraj J, Spinella MJ. Toward a Mechanistic Understanding of Poly- and Perfluoroalkylated Substances and Cancer. Cancers (Basel) 2022; 14:cancers14122919. [PMID: 35740585 PMCID: PMC9220899 DOI: 10.3390/cancers14122919] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 06/06/2022] [Accepted: 06/06/2022] [Indexed: 01/27/2023] Open
Abstract
Simple Summary Poly- and perfluoroalkylated substances (PFAS) are industrial chemicals found in many household products that persist in the environment. While several excellent review articles exist on the potential harmful effects of PFAS, there are few focused on cancer. This concise and streamlined mini-review focuses on summarizing molecular mechanisms related to the potential cancer-promoting properties of PFAS. This review organizes and interprets the vast primary PFAS cancer biology literature and provides a coherent, unified, and digestible model of the molecular mechanisms that potentially explains PFAS cancer promotion. Abstract Poly- and perfluoroalkylated substances (PFAS) are chemicals that persist and bioaccumulate in the environment and are found in nearly all human populations through several routes of exposure. Human occupational and community exposure to PFAS has been associated with several cancers, including cancers of the kidney, testis, prostate, and liver. While evidence suggests that PFAS are not directly mutagenic, many diverse mechanisms of carcinogenicity have been proposed. In this mini-review, we organize these mechanisms into three major proposed pathways of PFAS action—metabolism, endocrine disruption, and epigenetic perturbation—and discuss how these distinct but interdependent pathways may explain many of the proposed pro-carcinogenic effects of the PFAS class of environmental contaminants. Notably, each of the pathways is predicted to be highly sensitive to the dose and window of exposure which may, in part, explain the variable epidemiologic and experimental evidence linking PFAS and cancer. We highlight testicular and prostate cancer as models to validate this concept.
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Affiliation(s)
- Raya I. Boyd
- Department of Comparative Biosciences, University of Illinois, Urbana-Champaign, Urbana, IL 61802, USA; (R.I.B.); (R.S.); (Z.F.)
| | - Saeed Ahmad
- Department of Bioengineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA; (S.A.); (J.I.)
| | - Ratnakar Singh
- Department of Comparative Biosciences, University of Illinois, Urbana-Champaign, Urbana, IL 61802, USA; (R.I.B.); (R.S.); (Z.F.)
| | - Zeeshan Fazal
- Department of Comparative Biosciences, University of Illinois, Urbana-Champaign, Urbana, IL 61802, USA; (R.I.B.); (R.S.); (Z.F.)
| | - Gail S. Prins
- Departments of Urology, Pathology and Physiology, College of Medicine, Chicago Center for Health and Environment, University of Illinois Chicago, Chicago, IL 60612, USA;
| | - Zeynep Madak Erdogan
- Department of Food Science and Human Nutrition, Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA;
- Institute of Genomic Biology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
- Beckman Institute of Technology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
- Cancer Center at Illinois, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
| | - Joseph Irudayaraj
- Department of Bioengineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA; (S.A.); (J.I.)
- Department of Food Science and Human Nutrition, Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA;
- Institute of Genomic Biology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
- Beckman Institute of Technology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
- Cancer Center at Illinois, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
| | - Michael J. Spinella
- Department of Comparative Biosciences, University of Illinois, Urbana-Champaign, Urbana, IL 61802, USA; (R.I.B.); (R.S.); (Z.F.)
- Institute of Genomic Biology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
- Cancer Center at Illinois, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
- Correspondence:
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20
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Han X, Alam MN, Cao M, Wang X, Cen M, Tian M, Lu Y, Huang Q. Low Levels of Perfluorooctanoic Acid Exposure Activates Steroid Hormone Biosynthesis through Repressing Histone Methylation in Rats. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:5664-5672. [PMID: 35438966 DOI: 10.1021/acs.est.1c08885] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a persistent organic pollutant, which has endocrine-disrupting properties and can interfere with the synthesis and secretion of testicular steroid hormones, but the underlying molecular mechanisms are still not fully understood. In this study, we investigated the effects of low doses of PFOA exposure on testicular steroidogenesis in rats and revealed the role of histone modifications. It was found that the serum levels of progesterone, testosterone, and estradiol were significantly increased after 0.015 and 0.15 mg/kg of PFOA exposure, and the expression of Star, a key rate-limiting gene, was up-regulated, while other steroidogenic genes Cyp11a1, Hsd3b, Cyp17a1, and Hsd17b were down-regulated. In addition, the levels of multiple histone modifications (H3K9me1/2/3 and H3K9/18/23ac) were all significantly reduced by PFOA in rat testis. Histone H3K9 methylation is associated with gene silencing, while histone acetylation leads to gene activation. ChIP analysis further showed that H3K9me1/3 was significantly decreased in the promoter region of Star, while H3K18ac levels were down-regulated in other gene promoters. Accordingly, we suggest that low-level PFOA enhances StAR expression through the repression of H3K9me1/3, which stimulates steroid hormone production in rat testis. These results are expected to shed new light on the molecular mechanisms by which low-dose PFOA disturbs male reproductive endocrine from an epigenetic aspect and may be useful for human health risk assessment regarding environmental PFOA exposure.
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Affiliation(s)
- Xuejingping Han
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Md Nur Alam
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Meiyi Cao
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Xiaojuan Wang
- Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Meifeng Cen
- Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Meiping Tian
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Yanyang Lu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Qingyu Huang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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21
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Zhao Y, Jin H, Qu J, Zhang S, Hu S, Xue J, Zhao M. The influences of perfluoroalkyl substances on the rheumatoid arthritis clinic. BMC Immunol 2022; 23:10. [PMID: 35246023 PMCID: PMC8895528 DOI: 10.1186/s12865-022-00483-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/23/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The effect of environmental factors on genetically susceptible individuals is a basic link in the pathogenesis of rheumatoid arthritis. Perfluoroalkyl substances (PFASs) are a class of synthetic organic fluorine chemicals, which have been mass-produced and widely used in the past 60 years, and also have been shown to be one of the major pollutants affecting human health. The impact of fluoride on the development of Rheumatoid Arthritis (RA) is unclear. This study explored the relationship between common fluoride and clinical manifestations of rheumatoid arthritis. RESULTS A cohort of 155 patients with RA and 145 health controls in Second Affiliated Hospital of Zhejiang University School of Medicine were investigated. Serum concentrations of all fluoride detected were higher in RA patients than in healthy controls. There were 43 male patients and 112 female patients in the RA cohort. Some of perfluoroalkyl substances (perfluorooctanoate (PFOA), perfluorononanoate (PFNA), perfluorotrdecanoate (PFTrA), perfluorooctanesulfonate (PFOS)) were correlated negatively with the Body Mass Index (BMI); some of them (PFOA, PFNA, PFTrA, PFOS, 8:2 Chlorinated polyfluorinated ether sulfonate (8:2Cl-PFESA)) were correlated positively with the Disease Activity Score 28 (DAS28); two (PFOA, PFOS) of them were correlated positively with the white blood cell count, and one (Perfluoroundecanoate (PFUnA)) of them was correlated negatively with the hemoglobin; two (Perfluorodecanoate (PFDA), PFUnA) of them were correlated negatively with the presence of interstitial lung disease. CONCLUSION These data suggest that exposure to perfluoroalkyl substances may promote the disease activity of rheumatoid arthritis and the visceral lesions.
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Affiliation(s)
- Yun Zhao
- Department of Rheumatology, Zhejiang University School of Medicine Second Affiliated Hospital, Hangzhou, 310009, Zhejiang, People's Republic of China
| | - Hangbiao Jin
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, People's Republic of China
| | - Jianli Qu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, People's Republic of China
| | - Sunzhao Zhang
- Department of Laboratory Medicine, Zhejiang University School of Medicine Second Affiliated Hospital, Hangzhou, 310009, Zhejiang, People's Republic of China
| | - Shilei Hu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, People's Republic of China
| | - Jing Xue
- Department of Rheumatology, Zhejiang University School of Medicine Second Affiliated Hospital, Hangzhou, 310009, Zhejiang, People's Republic of China.
| | - Meirong Zhao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, People's Republic of China.
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22
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Huang Q, Luo L, Han X, Li F, Zhang X, Tian M. Low-dose perfluorooctanoic acid stimulates steroid hormone synthesis in Leydig cells: Integrated proteomics and metabolomics evidence. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127656. [PMID: 34774353 DOI: 10.1016/j.jhazmat.2021.127656] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/18/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
Perfluorooctanoic acid (PFOA), one of the well-known perfluoroalkyl substances (PFASs), has been widespread in the environment and associated with male reproductive toxicity. However, the molecular mechanism involved in low-level PFOA-induced male endocrine disruption remains to be elucidated. In this study, we performed a combined proteomics and metabolomics analysis to investigate the proteomic and metabolic alterations in MLTC-1 Leydig cells responsive to low levels of PFOA exposure. The results showed that PFOA significantly regulated the expressions of 67 proteins and 17 metabolites, among which 18 proteins and 7 metabolites were specifically tied to lipid and fatty acid metabolism as well as testicular steroidogenesis. It is further suggested that low-dose PFOA stimulates steroid hormone synthesis by accelerating fatty acid metabolism and steroidogenic process, which is involved in the repression of p38 and cAMP-dependent ERK signaling pathway. The animal studies also revealed that environmentally relevant levels of PFOA increased serum steroid hormone levels accompanied by the activated cAMP and inhibited p38/ERK pathway in testis, which confirmed our in vitro findings. Overall, the present study will provide novel insights into the toxicological mechanisms of low-level PFOA-mediated steroidogenic disturbance, and may implicate the reproductive health risk of humans with environmental PFOA exposure.
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Affiliation(s)
- Qingyu Huang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| | - Lianzhong Luo
- Xiamen Key Laboratory of Marine Biomedicine Resources, Xiamen Medical College, Xiamen 361023, China
| | - Xuejingping Han
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fuping Li
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Xi Zhang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Meiping Tian
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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23
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Wang Y, Zhang Y, Shi Z, Di T, Yu W, Chen L. Exposure of male mice to perfluorooctanoic acid induces anxiety-like behaviors by increasing corticotropin-releasing factor in the basolateral amygdala complex. CHEMOSPHERE 2022; 287:132170. [PMID: 34826932 DOI: 10.1016/j.chemosphere.2021.132170] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 08/16/2021] [Accepted: 09/02/2021] [Indexed: 06/13/2023]
Abstract
Perfluorooctanoic acid (PFOA), a hazardous environmental pollutant, has been found to enhance hepatic synthesis of fibroblast growth factor 21 (FGF21). FGF21 can enter the brain and increase the expression of corticotropin-releasing factor (CRF) in the paraventricular nucleus (PVN). In this study, adult male mice were orally administered PFOA to evaluate how it regulates emotion. Exposure of mice to PFOA (1 mg kg-1 bw) for 10 consecutive days (PFOA-mice) caused anxiety-like behaviors and a peroxisome proliferator-activated receptor α (PPARα)-dependent increase in hepatic FGF21 synthesis. The levels of CRF expression in not only PVN but also basolateral amygdala complex (BLA) neurons of PFOA-mice were increased via FGF receptor 1 (FGF-R1) activation. However, the microinjection of FGF-R1 or CRF 1 receptor (CRF-R1) antagonist in the BLA rather than the PVN of PFOA-mice could relieve their anxiety-like behaviors. In addition, external capsule-BLA synaptic transmission in PFOA-mice was enhanced by increasing CRF-R1-mediated presynaptic glutamate release, which was corrected by the blockade of PPARα, FGF-R1 and CRF-R1 or the inhibition of PKA. Furthermore, the threshold of frequency-dependent long-term potentiation (LTP) induction was decreased in the BLA of PFOA-mice, which depended on the activation of PPARα, FGF-R1, CRF-R1, PKA and NMDA receptor (NMDAR), whereas long-term depression (LTD) induction was unchanged. Thus, the results indicate that the exposure of male mice to PFOA (1 mg kg-1 bw) enhances CRF expression in BLA neurons by increasing hepatic FGF21 synthesis, which then enhances CRF-R1-mediated presynaptic glutamate release to facilitate NMDAR-dependent BLA-LTP induction, leading to the production of anxiety-like behaviors.
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Affiliation(s)
- Ya Wang
- Department of Physiology, Nanjing Medical University, Nanjing, 211166, China
| | - Yajie Zhang
- Department of Physiology, Nanjing Medical University, Nanjing, 211166, China
| | - Zhaochun Shi
- Department of Neurology, First Affiliated Hospital of Nanjing Medical University, Guangzhou Road 300, Nanjing, 210029, China
| | - Tingting Di
- Department of Physiology, Nanjing Medical University, Nanjing, 211166, China
| | - Wenfeng Yu
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, 550004, China.
| | - Ling Chen
- Department of Physiology, Nanjing Medical University, Nanjing, 211166, China.
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24
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Aghaei Z, Steeves KL, Jobst KJ, Cahill LS. The impact of perfluoroalkyl substances on pregnancy, birth outcomes and offspring development: A review of data from mouse models1. Biol Reprod 2021; 106:397-407. [PMID: 34875017 DOI: 10.1093/biolre/ioab223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 10/29/2021] [Accepted: 12/02/2021] [Indexed: 11/12/2022] Open
Abstract
Per- and polyfluoroalkyl substances (PFASs) such as perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) are persistent in the environment and bioaccumulate in wildlife and humans, potentially causing adverse health effects at all stages of life. Studies from human pregnancy have shown that exposure to these contaminants are associated with placental dysfunction and fetal growth restriction; however, studies in humans are confounded by genetic and environmental factors. Here, we synthesize the available results from mouse models of pregnancy to show the causal effects of prenatal exposure to PFOA and PFOS on placental and fetal development and on neurocognitive function and metabolic disorders in offspring. We also propose gaps in the present knowledge and provide suggestions for future research studies.
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Affiliation(s)
- Zahra Aghaei
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Katherine L Steeves
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Karl J Jobst
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Lindsay S Cahill
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
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25
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Kirk AB, Michelsen-Correa S, Rosen C, Martin CF, Blumberg B. PFAS and Potential Adverse Effects on Bone and Adipose Tissue Through Interactions With PPARγ. Endocrinology 2021; 162:6364127. [PMID: 34480479 PMCID: PMC9034324 DOI: 10.1210/endocr/bqab194] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Indexed: 01/06/2023]
Abstract
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are a widely dispersed, broad class of synthetic chemicals with diverse biological effects, including effects on adipose and bone differentiation. PFAS most commonly occur as mixtures and only rarely, if ever, as single environmental contaminants. This poses significant regulatory questions and a pronounced need for chemical risk assessments, analytical methods, and technological solutions to reduce the risk to public and environmental health. The effects of PFAS on biological systems may be complex. Each may have several molecular targets initiating multiple biochemical events leading to a number of different adverse outcomes. An exposure to mixtures or coexposures of PFAS complicates the picture further. This review illustrates how PFAS target peroxisome proliferator-activated receptors. Additionally, we describe how such activation leads to changes in cell differentiation and bone development that contributes to metabolic disorder and bone weakness. This discussion sheds light on the importance of seemingly modest outcomes observed in test animals and highlights why the most sensitive end points identified in some chemical risk assessments are significant from a public health perspective.
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Affiliation(s)
- Andrea B Kirk
- Correspondence: Andrea Kirk, PhD, US EPA Headquarters, William Jefferson Clinton Bldg, 1200 Pennsylvania Ave NW, Mail Code 5201P, Washington, DC 20460, USA.
| | - Stephani Michelsen-Correa
- EPA Office of Chemical Safety and Pollution Prevention, Biopesticides and Pollution Prevention Division, Washington, District of Columbia 20460, USA
| | - Cliff Rosen
- Tufts University School of Medicine, Boston, Massachusetts 02111, USA
| | | | - Bruce Blumberg
- University of California, Irvine, Irvine, California 92697, USA
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26
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Luo K, Liu X, Nian M, Wang Y, Qiu J, Yu H, Chen X, Zhang J. Environmental exposure to per- and polyfluoroalkyl substances mixture and male reproductive hormones. ENVIRONMENT INTERNATIONAL 2021; 152:106496. [PMID: 33744484 DOI: 10.1016/j.envint.2021.106496] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/28/2021] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Previous epidemiological studies on the relationship between per- and polyfluoroalkyl substances (PFAS) exposure and male reproductive hormones were mainly limited to a few legacy PFAS and ignored the possible mixture effects. OBJECTIVES To assess the associations of PFAS mixture, branched isomers and emerging alternatives of PFAS with male reproductive hormones. METHODS A total of 902 men (mean age: 31.3 years) were recruited in this cross-sectional study. We quantified 24 targeted PFAS, including 7 branched PFOS isomers, 2 branched PFOA isomers and 2 components of F-53B, in blood plasma. Five reproductive hormones, including total testosterone (TT), estradiol (E2), follicular stimulating hormone (FSH), luteinizing hormone (LH) and insulin like factor 3 (INSL3), and sex hormone binding globulin (SHBG) were measured in serum. Associations were first assessed by confounder-adjusted multiple linear regression while correcting for multiple comparisons. Bayesian kernel machine regression (BKMR) and adaptive elastic net (AENET) were further used to assess mixture effects and the adjusted exposure response (ER) relationship of individual PFAS. RESULTS After adjusting for confounders, we found that PFAS mixture was significantly and inversely associated with E2 and E2/TT, with perfluoro-n-undecanoic acid (PFuDA) being the major contributor. Although the associations between PFAS mixture and other hormones were non-significant, certain individual PFAS presented significant associations. Notably, perfluoro-n-tridecanoic acid (PFTrDA) and perfluoro-n-dodecanoic acid (PFDoA) were found to be significantly and inversely associated with INSL3, a unique indicator of Leydig cells function. Meanwhile, significant positive associations were found between perfluorobutane sulfonic acid (PFBS) and FSH and between PFuDA and LH. But the associations with branched isomers or F-53B were sporadic and inconsistent. CONCLUSIONS Our findings provided the evidence that PFAS mixture may reduce E2 level, and certain PFAS (i.e., PFTrDA and PFDoA) may have negative effects on Leydig cells function among young men. Additional studies are much needed to confirm our results and elucidate potential mechanisms.
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Affiliation(s)
- Kai Luo
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Xiaotu Liu
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Min Nian
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Yuqing Wang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Jin Qiu
- Center for Reproductive Medicine, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China; Shanghai Human Sperm Bank, Shanghai 200135, China
| | - Hao Yu
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Xiangfeng Chen
- Center for Reproductive Medicine, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China; Shanghai Human Sperm Bank, Shanghai 200135, China.
| | - Jun Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China.
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27
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Christensen JVR, Bangash KK, Weihe P, Grandjean P, Nielsen F, Jensen TK, Petersen MS. Maternal exposure to perfluoroalkyl chemicals and anogenital distance in the offspring: A Faroese cohort study. Reprod Toxicol 2021; 104:52-57. [PMID: 34182087 DOI: 10.1016/j.reprotox.2021.06.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 05/29/2021] [Accepted: 06/23/2021] [Indexed: 10/21/2022]
Abstract
Exposure to perfluoroalkyl substances (PFASs) has in some studies been associated with reduced anogenital distance (AGD) in newborns as a sensitive indicator of prenatal anti-androgenic exposure. The aim of this study was to investigate the association between maternal PFAS exposure and offspring AGD in a population with wide ranges of PFAS exposures. Participants were recruited in the Faroe Islands in 2007-2009, and information on AGD and PFAS exposure was obtained from 463 mother-infant pairs. Perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA) and perfluorodecanoic acid (PFDA) were measured in maternal serum. Data were analyzed using multiple linear regression analysis adjusted for birth weight, child age at examination, parity, and maternal education level. Among boys, higher maternal serum concentrations of PFOA, PFOS, PFNA and PFDA were significantly associated with a longer AGD, both with the exposure entered as a continuous variable and as quartiles. Boys in the highest quartile of PFOA, PFOS, PFNA and PFDA exposure had an increase in AGD of 1.2 mm (95 % CI 0.1;2.2), 1.3 mm (95 % CI 0.3;2.3), 1.0 mm (95 % CI 0.0:2.0) and 1.3 mm (95 % CI 0.3;2.4), respectively, when compared to boys in the lowest quartile of exposure (p < 0.05). No significant association was found between male AGD and PFHxS. No association was found for girls. In conclusion, elevated maternal exposure to major PFASs was significantly associated with a longer AGD in boys. No significant associations were found among girls, thus suggesting a sex-dimorphic effect of PFAS exposure.
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Affiliation(s)
| | - Khushal Khan Bangash
- Department of Pharmacology, Clinical Pharmacy and Environmental Medicine, University of Southern Denmark, 5000 Odense, Denmark
| | - Pál Weihe
- Department of Occupational Medicine and Public Health, The Faroes Hospital System, FO-100 Tórshavn, Faroe Islands; Center of Health Science, University of the Faroe Islands, FO-100 Tórshavn, Faroe Islands
| | - Phillippe Grandjean
- Department of Pharmacology, Clinical Pharmacy and Environmental Medicine, University of Southern Denmark, 5000 Odense, Denmark; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02215, USA
| | - Flemming Nielsen
- Department of Pharmacology, Clinical Pharmacy and Environmental Medicine, University of Southern Denmark, 5000 Odense, Denmark
| | - Tina Kold Jensen
- Department of Pharmacology, Clinical Pharmacy and Environmental Medicine, University of Southern Denmark, 5000 Odense, Denmark
| | - Maria Skaalum Petersen
- Department of Occupational Medicine and Public Health, The Faroes Hospital System, FO-100 Tórshavn, Faroe Islands; Center of Health Science, University of the Faroe Islands, FO-100 Tórshavn, Faroe Islands.
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28
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Zou C, Yan H, Wen Z, Li C, Zhang S, Ying Y, Pan P, Li Y, Li H, Li X, Wang Y, Zhong Y, Ge RS, Rao D. Perfluorotridecanoic Acid Inhibits Leydig Cell Maturation in Male Rats in Late Puberty via Changing Testicular Lipid Component. Chem Res Toxicol 2021; 34:1542-1555. [PMID: 34081457 DOI: 10.1021/acs.chemrestox.0c00458] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Perfluorotridecanoic acid (PFTrDA) is a long-chain (C13) perfluoroalkyl carboxylic acid. Here, we report the influence of PFTrDA exposure on the maturation of rat Leydig cells in late puberty in vivo. Male Sprague-Dawley rats were administered PFTrDA by gavage of 0, 1, 5, and 10 mg/kg/day from 35 days to 56 days postpartum. PFTrDA had no effect on body weight, testis weight, and epididymis weight. It significantly decreased the serum testosterone level after 5 and 10 mg/kg exposure, while it did not alter the serum estradiol level. The serum luteinizing hormone level was markedly reduced after 10 mg/kg PFTrDA exposure, while the follicle-stimulating hormone level was unchanged. Star, Cyp11a1, Cyp17a1, Hsd3b1, and Insl3 transcript levels in the testis were markedly lowered in the 1-5 mg/kg PFTrDA group and the Lhb transcript level in the pituitary in the 10 mg/kg group. CYP11A1 and HSD11B1-positive Leydig cell numbers were markedly reduced after 10 mg/kg PFTrDA exposure. Testicular triglyceride and free fatty acid (palmitic acid, oleic acid, and linoleic acid) levels were significantly reduced by PFTrDA, while Mgll (up-regulation) and Scarb1 and Elovl5 (down-regulation) expression were altered. AKT1 and AMPK phosphorylation was stimulated after 10 PFTrDA mg/kg exposure. In conclusion, PFTrDA delays the maturation of Leydig cells in late puberty mainly by altering the free fatty acid profile.
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Affiliation(s)
- Cheng Zou
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Haoni Yan
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Zina Wen
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China.,Chengdu Xi'nan Gynecological Hospital, Chengdu 610066, Sichuan, China
| | - Changchang Li
- Department of Urology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Song Zhang
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Yingfen Ying
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Peipei Pan
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Yang Li
- Department of Urology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Huitao Li
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Xiaoheng Li
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Yiyan Wang
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Ying Zhong
- Chengdu Xi'nan Gynecological Hospital, Chengdu 610066, Sichuan, China
| | - Ren-Shan Ge
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
| | - Dapang Rao
- Department of Urology, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang, China
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Bao J, Zhang Y, Zhang L, Wang X. Effects of maternal exposure to PFOA on testes of male offspring mice. CHEMOSPHERE 2021; 272:129585. [PMID: 33465609 DOI: 10.1016/j.chemosphere.2021.129585] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
This study was conducted to explore the effects of maternal exposure to perfluorooctanoic acid (PFOA) on testicular development of male offspring mice. 20 pregnant Kunming mice were randomly divided into control group and PFOA exposure group with 10 mice of each. In PFOA exposure group, pregnant mice were given 5 mg/kg BW PFOA daily by gavage during gestation. Male offspring mice were killed to separate serum and collect testis at postpartum day 21, then tested the experimental indicators. The results showed that compared with control group, the content of PFOA in the serum of PFOA-exposed mice increased significantly and testosterone content is significantly reduced. Histological observations revealed architectural damages in testis in PFOA exposed groups and the apoptosis was increased. Transcriptome sequencing results showed that the U4/U6 snRNA coding genes snu13 and prp19 complex coding genes HSP73 were up-regulated and the U5 snRNA coding genes Brr2, Prp8 and EJC/TREX coding THOC genes were down-regulated after PFOA exposure Real-time PCR confirmed this result. These results indicate that the exposure of pregnant mice to perfluorooctanoic acid will have a damaging effect on the development of testes in male offspring mice, which may be due to blocked activation of the shear body, changes in structural functions, and inability to perform shear functions.
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Affiliation(s)
- Jialu Bao
- College of Traditional Chinese Veterinary Medicine, Hebei Agricultural University, Baoding, 071001, China
| | - Yan Zhang
- College of Traditional Chinese Veterinary Medicine, Hebei Agricultural University, Baoding, 071001, China
| | - Linchao Zhang
- College of Traditional Chinese Veterinary Medicine, Hebei Agricultural University, Baoding, 071001, China
| | - Xiaodan Wang
- College of Traditional Chinese Veterinary Medicine, Hebei Agricultural University, Baoding, 071001, China.
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Wang Z, Zhang T, Wu J, Wei X, Xu A, Wang S, Wang Z. Male reproductive toxicity of perfluorooctanoate (PFOA): Rodent studies. CHEMOSPHERE 2021; 270:128608. [PMID: 33081999 DOI: 10.1016/j.chemosphere.2020.128608] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/04/2020] [Accepted: 10/08/2020] [Indexed: 06/11/2023]
Abstract
Perfluorooctanoic acid (PFOA) is an artificial organic substance widely used for decades, which seriously threatens human health. This study aimed to identify human-relevant correlates between PFOA exposure and the male rodent reproductive system. We performed a systematic literature review of the relevant literature of PubMed, Cochrane Library databases, Web of Science and Embase from the establishment to April 2020. Studies included the effects of PFOA on the reproductive system of male rodents. The meta-analysis was performed on the basis of the following points: level of testosterone and estradiol in serum, development of reproductive organs, pathological changes of reproduction organs and parameters of semen. A series of 16 studies was enrolled in this study. The standard mean difference (SMD) for PFOA-related reproductive toxicity was summarised as -0.39 (95% confidence interval [CI]: 0.71, -0.07). The lower serum testosterone levels, decreased absolute testicular and epididymal weights, higher serum estradiol levels, elevated relative testicular and seminal vesicle weights and increased incidence of Leydig cell adenoma and percentage of abnormal sperm were observed in the exposed group compared with the control group. However, no statistical difference was found in the day of preputial separation of pups and percentage of motile sperm. In conclusion, PFOA exposure heightens the reproductive system damage in male rodents. However, many studies included in the review did not identify mechanisms by which PFOA induces changes to the male reproductive system, which is an area for additional study.
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Affiliation(s)
- Zhongyuan Wang
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Street, Nanjing, Jiangsu Province, 210029, China
| | - Tongtong Zhang
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Street, Nanjing, Jiangsu Province, 210029, China
| | - Jiajin Wu
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Street, Nanjing, Jiangsu Province, 210029, China
| | - Xiyi Wei
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Street, Nanjing, Jiangsu Province, 210029, China
| | - Aiming Xu
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Street, Nanjing, Jiangsu Province, 210029, China.
| | - Shangqian Wang
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Street, Nanjing, Jiangsu Province, 210029, China.
| | - Zengjun Wang
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Street, Nanjing, Jiangsu Province, 210029, China.
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Tarapore P, Ouyang B. Perfluoroalkyl Chemicals and Male Reproductive Health: Do PFOA and PFOS Increase Risk for Male Infertility? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18073794. [PMID: 33916482 PMCID: PMC8038605 DOI: 10.3390/ijerph18073794] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/18/2021] [Accepted: 03/23/2021] [Indexed: 01/09/2023]
Abstract
Poly- and perfluoroalkyl substances (PFAS) are manmade synthetic chemicals which have been in existence for over 70 years. Though they are currently being phased out, their persistence in the environment is widespread. There is increasing evidence linking PFAS exposure to health effects, an issue of concern since PFAS such as perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) bioaccumulate in humans, with a half-life of years. Many epidemiological studies suggest that, worldwide, semen quality has decreased over the past several decades. One of the most worrying effects of PFOS and PFOA is their associations with lower testosterone levels, similar to clinical observations in infertile men. This review thus focuses on PFOS/PFOA-associated effects on male reproductive health. The sources of PFAS in drinking water are listed. The current epidemiological studies linking increased exposure to PFAS with lowered testosterone and semen quality, and evidence from rodent studies supporting their function as endocrine disruptors on the reproductive system, exhibiting non-monotonic dose responses, are noted. Finally, their mechanisms of action and possible toxic effects on the Leydig, Sertoli, and germ cells are discussed. Future research efforts must consider utilizing better human model systems for exposure, using more accurate PFAS exposure susceptibility windows, and improvements in statistical modeling of data to account for the endocrine disruptor properties of PFAS.
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Affiliation(s)
- Pheruza Tarapore
- Department of Environmental and Public Health Sciences, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA;
- Center of Environmental Genetics, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA
- Cincinnati Cancer Center, University of Cincinnati, Cincinnati, OH 45267, USA
- Correspondence: or ; Tel.: +1-513-558-5148
| | - Bin Ouyang
- Department of Environmental and Public Health Sciences, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA;
- Center of Environmental Genetics, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA
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Yan H, Li C, Zou C, Xin X, Li X, Li H, Li Y, Li Z, Wang Y, Chen H, Ge RS. Perfluoroundecanoic acid inhibits Leydig cell development in pubertal male rats via inducing oxidative stress and autophagy. Toxicol Appl Pharmacol 2021; 415:115440. [PMID: 33549592 DOI: 10.1016/j.taap.2021.115440] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 01/09/2023]
Abstract
Perfluoroundecanoic acid (PFUnA) is one of long-chain perfluoroalkyl carboxylic acids. However, the effect of PFUnA on pubertal development of Leydig cells remains unclear. The goal of this study was to investigate the effect of PFUnA on Leydig cell development in pubertal male rats. We orally dosed male Sprague-Dawley rats (age 35 days) with PFUnA at doses of 0, 1, 5, and 10 mg/kg/day from postnatal day (PND) 35 to PND 56. Serum testosterone and luteinizing hormone levels were remarkably reduced by PFUnA at ≥1 mg/kg while serum follicle-stimulating hormone levels were lowered at 5 and 10 mg/kg. PFUnA down-regulated the expression of Lhcgr, Scarb1, Star, Cyp11a1, Hsd3b1, Cyp17a1, Hsd17b3, Hsd11b1, Insl3, Nr5a1, Fshr, Dhh, Sod1, and Sod2 and their proteins in the testis and the expression of Lhb and Fshb in the pituitary. PFUnA reduced Leydig cell number at 5 and 10 mg/kg. PFUnA induced oxidative stress and increased autophagy. These may result from the inhibition of phosphorylation of mTOR, AKT1, AKT2, and ERK1/2 in the testis. In conclusion, PFUnA exhibits inhibitory effects on pubertal Leydig cell development possibly via inducing oxidative stress and increasing autophagy.
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Affiliation(s)
- Haoni Yan
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Changchang Li
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Cheng Zou
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiu Xin
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiaoheng Li
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Huitao Li
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yang Li
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zengqiang Li
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yiyan Wang
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Haolin Chen
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Ren-Shan Ge
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
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Calvert L, Green MP, De Iuliis GN, Dun MD, Turner BD, Clarke BO, Eamens AL, Roman SD, Nixon B. Assessment of the Emerging Threat Posed by Perfluoroalkyl and Polyfluoroalkyl Substances to Male Reproduction in Humans. Front Endocrinol (Lausanne) 2021; 12:799043. [PMID: 35356147 PMCID: PMC8959433 DOI: 10.3389/fendo.2021.799043] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/30/2021] [Indexed: 01/09/2023] Open
Abstract
Per-fluoroalkyl and polyfluoroalkyl substances (PFAS) are a diverse group of synthetic fluorinated chemicals used widely in industry and consumer products. Due to their extensive use and chemical stability, PFAS are ubiquitous environmental contaminants and as such, form an emerging risk factor for male reproductive health. The long half-lives of PFAS is of particular concern as the propensity to accumulate in biological systems prolong the time taken for excretion, taking years in many cases. Accordingly, there is mounting evidence supporting a negative association between PFAS exposure and an array of human health conditions. However, inconsistencies among epidemiological and experimental findings have hindered the ability to definitively link negative reproductive outcomes to specific PFAS exposure. This situation highlights the requirement for further investigation and the identification of reliable biological models that can inform health risks, allowing sensitive assessment of the spectrum of effects of PFAS exposure on humans. Here, we review the literature on the biological effects of PFAS exposure, with a specific focus on male reproduction, owing to its utility as a sentinel marker of general health. Indeed, male infertility has increasingly been shown to serve as an early indicator of a range of co-morbidities such as coronary, inflammatory, and metabolic diseases. It follows that adverse associations have been established between PFAS exposure and the incidence of testicular dysfunction, including pathologies such as testicular cancer and a reduction in semen quality. We also give consideration to the mechanisms that render the male reproductive tract vulnerable to PFAS mediated damage, and discuss novel remediation strategies to mitigate the negative impact of PFAS contamination and/or to ameliorate the PFAS load of exposed individuals.
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Affiliation(s)
- Leah Calvert
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, Newcastle, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, Newcastle NSW, Australia
| | - Mark P. Green
- School of BioSciences, Faculty of Science, University of Melbourne, VIC, Australia
| | - Geoffry N. De Iuliis
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, Newcastle, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, Newcastle NSW, Australia
| | - Matthew D. Dun
- Hunter Medical Research Institute, New Lambton Heights, Newcastle NSW, Australia
- Cancer Signalling Research Group, School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW, Australia
| | - Brett D. Turner
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, Sydney, NSW, Australia
- Priority Research Centre for Geotechnical Science and Engineering, University of Newcastle, Callaghan, NSW, Australia
| | - Bradley O. Clarke
- Australian Laboratory for Emerging Contaminants, School of Chemistry, University of Melbourne, Melbourne, VIC, Australia
| | - Andrew L. Eamens
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, Newcastle, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, Newcastle NSW, Australia
| | - Shaun D. Roman
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, Newcastle, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, Newcastle NSW, Australia
- Priority Research Centre for Drug Development, University of Newcastle, Callaghan, NSW, Australia
| | - Brett Nixon
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, Newcastle, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, Newcastle NSW, Australia
- *Correspondence: Brett Nixon,
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Lin T, Zhang Y, Ding X, Huang T, Zhang W, Zou W, Kuang H, Yang B, Wu L, Zhang D. Perfluorooctanoic acid induces cytotoxicity in spermatogonial GC-1 cells. CHEMOSPHERE 2020; 260:127545. [PMID: 32653749 DOI: 10.1016/j.chemosphere.2020.127545] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 06/22/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
Perfluorooctane acid (PFOA), a typical perfluorinated chemical, has been suggested to interfere with male reproductive function. In this study, mouse spermatogonial GC-1 cells were in vitro treated with PFOA (250, 500 or 750 μM) for 24 h to investigate the cytotoxicity of PFOA and its underlying mechanisms. Our results indicated that exposure to intermediate and high doses of PFOA suppressed the viability of GC-1 cells in a concentration-dependent manner. Furthermore, PFOA treatment markedly enhanced the generation of reactive oxygen species and malondialdehyde, with diminished activity of superoxide dismutase. Particularly, PFOA exposure evoked a decline in mitochondrial membrane potential and ATP production. Furthermore, the apoptotic index and caspase-3 activity were significantly elevated after treatment with PFOA. In addition, PFOA incubation caused an increase in LC3B-II/LC3B-I ratio. Meanwhile, PFOA resulted in an excessive accumulation of autophagosomes in the cytoplasm. Taken together, exposure to PFOA can elicit cytotoxicity to spermatogonial GC-1 cells in vitro, which may be link to the mitochondrial oxidative damage and induction of apoptosis and autophagy.
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Affiliation(s)
- Tingting Lin
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Yurong Zhang
- Medical College of Nanchang University, Nanchang, 330006, PR China
| | - Xinbao Ding
- Department of Biomedical Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Tao Huang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Wenjuan Zhang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Weiying Zou
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Haibin Kuang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Bei Yang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Lei Wu
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Dalei Zhang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China.
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Li Z, Li C, Wen Z, Yan H, Zou C, Li Y, Tian L, Lei Z, Li H, Wang Y, Zhong Y, Ge RS. Perfluoroheptanoic acid induces Leydig cell hyperplasia but inhibits spermatogenesis in rats after pubertal exposure. Toxicology 2020; 448:152633. [PMID: 33220336 DOI: 10.1016/j.tox.2020.152633] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 12/12/2022]
Abstract
Perfluoroheptanoic acid (PFHpA) is a short-chain alternative to long-chain perfluoroalkyl substances, which have been reported to possess reproductive toxicity. However, it is unclear whether PFHpA affects Leydig cell development during puberty. The 35-day-old Sprague Dawley male rats were exposed to PFHpA by gavage with 0 (corn oil), 10, 50, and 100 mg/kg/day for 21 days. PFHpA did not affect the body weight of rats, but it reduced testis weight, relative testis weight, and epididymis weight at 100 mg/kg. It significantly increased serum testosterone, luteinizing hormone, and follicle-stimulating hormone levels at a dose of 100 mg/kg without affecting serum estradiol levels. PFHpA suppressed sperm production at a dose of 100 mg/kg. PFHpA induced Leydig cell hyperplasia (increased number of CYP11A1-positive Leydig cells) at a dose of 100 mg/kg, but down-regulated the expression of Cyp11a1, Hsd3b1, and Cyp17a1 in individual Leydig cell pe se and up-regulated the expression of Fshr in the Sertoli cell pe se. PFHpA did not affect the number of HSD11B1 (a biomarker for more mature Leydig cells) positive Leydig cells and SOX9 positive Sertoli cells. PFHpA increased BCL2, and the phosphorylation of AKT1, AKT2, ERK1/2, and JNK, but decreased BAX levels. However, it had no effect on SIRT1 and PGC-1α levels. In conclusion, PFHpA induces Leydig cell hyperplasia due to the increase in the secretion of luteinizing hormone through negative feedback after down-regulating the expression of steroidogenic enzymes and inhibiting testosterone production in individual Leydig cells. This proliferation may be mediated by increasing BCL2 and phosphorylation of AKT, ERK1/2, and JNK, and decreasing BAX level.
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Affiliation(s)
- Zengqiang Li
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Changchang Li
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Zina Wen
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Chengdu Xi'nan Gynecological Hospital, Chengdu, Sichuan, China
| | - Haoni Yan
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Cheng Zou
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Yang Li
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Lili Tian
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Zhen Lei
- Chengdu Xi'nan Gynecological Hospital, Chengdu, Sichuan, China
| | - Huitao Li
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Yiyan Wang
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Ying Zhong
- Chengdu Xi'nan Gynecological Hospital, Chengdu, Sichuan, China.
| | - Ren-Shan Ge
- Department of Anesthesiology, Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China.
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36
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Cui Q, Pan Y, Wang J, Liu H, Yao B, Dai J. Exposure to per- and polyfluoroalkyl substances (PFASs) in serum versus semen and their association with male reproductive hormones. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 266:115330. [PMID: 32781340 DOI: 10.1016/j.envpol.2020.115330] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/20/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Given that per- and polyfluoroalkyl substances (PFASs) exhibit different distribution in the serum and semen of adult men, improving our understanding of the predictors of PFAS concentrations in paired serum and semen samples from an individual is essential. Here, we investigated and compared the effects of emerging and legacy PFAS concentrations in serum and semen on reproductive hormone levels in serum within a Chinese adult male population. We explored the relationships among perfluorooctanoate (PFOA), perfluorononanoate (PFNA), perfluorooctane sulfonate (PFOS), and chlorinated polyfluorinated ether sulfonate (6:2 Cl-PFESA) in serum and semen with reproductive hormones in serum among 651 adult men from Nanjing, China. Significant relationships among all analyzed serum and semen PFASs and decreased total testosterone (total T) were found. Serum and semen PFOA levels were associated with significant decreases in free T. Furthermore, the levels of sex hormone-binding globulin (SHBG) were significantly decreased in association with PFNA, PFOS, and 6:2 Cl-PFESA exposure. Negative relationships between the total T/luteinizing hormone (LH) ratio and semen concentrations of selected PFASs were also observed. After adjustment of PFAS concentrations (in both semen and serum), stronger associations of PFASs with total T, free T, estradiol (E2), SHBG, and total T/LH were observed in semen than in serum. We found that 84.8% of the associations between serum PFOA with total T were mediated by semen PFOA. Thus, elevated PFAS exposure may have negative effects on male reproductive health, and semen PFAS may be a better exposure indicator for the male reproductive system than serum PFAS.
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Affiliation(s)
- Qianqian Cui
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yitao Pan
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jinghua Wang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Hongxiu Liu
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430000, Hubei, China
| | - Bing Yao
- Reproductive Medical Center, Nanjing Jinling Hospital, Nanjing University, School of Medicine, Nanjing, 210002, Jiangsu, China
| | - Jiayin Dai
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
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37
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Bonato M, Corrà F, Bellio M, Guidolin L, Tallandini L, Irato P, Santovito G. PFAS Environmental Pollution and Antioxidant Responses: An Overview of the Impact on Human Field. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E8020. [PMID: 33143342 PMCID: PMC7663035 DOI: 10.3390/ijerph17218020] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 10/23/2020] [Accepted: 10/27/2020] [Indexed: 01/09/2023]
Abstract
Due to their unique properties, perfluorinated substances (PFAS) are widely used in multiple industrial and commercial applications, but they are toxic for animals, humans included. This review presents some available data on the PFAS environmental distribution in the world, and in particular in Europe and in the Veneto region of Italy, where it has become a serious problem for human health. The consumption of contaminated food and drinking water is considered one of the major source of exposure for humans. Worldwide epidemiological studies report the negative effects that PFAS have on human health, due to environmental pollution, including infertility, steroid hormone perturbation, thyroid, liver and kidney disorders, and metabolic disfunctions. In vitro and in vivo researches correlated PFAS exposure to oxidative stress effects (in mammals as well as in other vertebrates of human interest), produced by a PFAS-induced increase of reactive oxygen species formation. The cellular antioxidant defense system is activated by PFAS, but it is only partially able to avoid the oxidative damage to biomolecules.
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Affiliation(s)
| | | | | | | | | | - Paola Irato
- Department of Biology, University of Padova, 35131 Padova, Italy; (M.B.); (F.C.); (M.B.); (L.G.); (L.T.)
| | - Gianfranco Santovito
- Department of Biology, University of Padova, 35131 Padova, Italy; (M.B.); (F.C.); (M.B.); (L.G.); (L.T.)
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38
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Schrenk D, Bignami M, Bodin L, Chipman JK, del Mazo J, Grasl‐Kraupp B, Hogstrand C, Hoogenboom L(R, Leblanc J, Nebbia CS, Nielsen E, Ntzani E, Petersen A, Sand S, Vleminckx C, Wallace H, Barregård L, Ceccatelli S, Cravedi J, Halldorsson TI, Haug LS, Johansson N, Knutsen HK, Rose M, Roudot A, Van Loveren H, Vollmer G, Mackay K, Riolo F, Schwerdtle T. Risk to human health related to the presence of perfluoroalkyl substances in food. EFSA J 2020; 18:e06223. [PMID: 32994824 PMCID: PMC7507523 DOI: 10.2903/j.efsa.2020.6223] [Citation(s) in RCA: 210] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The European Commission asked EFSA for a scientific evaluation on the risks to human health related to the presence of perfluoroalkyl substances (PFASs) in food. Based on several similar effects in animals, toxicokinetics and observed concentrations in human blood, the CONTAM Panel decided to perform the assessment for the sum of four PFASs: PFOA, PFNA, PFHxS and PFOS. These made up half of the lower bound (LB) exposure to those PFASs with available occurrence data, the remaining contribution being primarily from PFASs with short half-lives. Equal potencies were assumed for the four PFASs included in the assessment. The mean LB exposure in adolescents and adult age groups ranged from 3 to 22, the 95th percentile from 9 to 70 ng/kg body weight (bw) per week. Toddlers and 'other children' showed a twofold higher exposure. Upper bound exposure was 4- to 49-fold higher than LB levels, but the latter were considered more reliable. 'Fish meat', 'Fruit and fruit products' and 'Eggs and egg products' contributed most to the exposure. Based on available studies in animals and humans, effects on the immune system were considered the most critical for the risk assessment. From a human study, a lowest BMDL 10 of 17.5 ng/mL for the sum of the four PFASs in serum was identified for 1-year-old children. Using PBPK modelling, this serum level of 17.5 ng/mL in children was estimated to correspond to long-term maternal exposure of 0.63 ng/kg bw per day. Since accumulation over time is important, a tolerable weekly intake (TWI) of 4.4 ng/kg bw per week was established. This TWI also protects against other potential adverse effects observed in humans. Based on the estimated LB exposure, but also reported serum levels, the CONTAM Panel concluded that parts of the European population exceed this TWI, which is of concern.
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Zhu Q, Li H, Wen Z, Wang Y, Li X, Huang T, Mo J, Wu Y, Zhong Y, Ge RS. Perfluoroalkyl substances cause Leydig cell dysfunction as endocrine disruptors. CHEMOSPHERE 2020; 253:126764. [PMID: 32464778 DOI: 10.1016/j.chemosphere.2020.126764] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Perfluoroalkyl substances (PFASs) are a group of man-made organic substances. Some of PFASs have been classified as persistent organic pollutants and endocrine disruptors. They might interfere with the male sex endocrine system, causing the abnormal development of the male reproductive tract and failure of pubertal onset and infertility. The present review discusses the development and function of two generations of Leydig cells in rodents and the effects of PFASs on Leydig cell development after their exposure in gestational and postnatal periods. We also discuss human epidemiological data for the effects of PFASs on male sex hormone levels. The structure-activity relationship of PFASs on Leydig cell steroidogenesis and enzyme activities are also discussed.
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Affiliation(s)
- Qiqi Zhu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Huitao Li
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zina Wen
- Chengdu Xi'nan Gynecological Hospital, Chengdu, Sichuan, China
| | - Yiyang Wang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiaoheng Li
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Tongliang Huang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jiaying Mo
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ying Wu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ying Zhong
- Chengdu Xi'nan Gynecological Hospital, Chengdu, Sichuan, China.
| | - Ren-Shan Ge
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
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Tian Y, Liang H, Miao M, Yang F, Ji H, Cao W, Liu X, Zhang X, Chen A, Xiao H, Hu H, Yuan W. Maternal plasma concentrations of perfluoroalkyl and polyfluoroalkyl substances during pregnancy and anogenital distance in male infants. Hum Reprod 2020; 34:1356-1368. [PMID: 31242507 DOI: 10.1093/humrep/dez058] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 03/08/2019] [Indexed: 12/20/2022] Open
Abstract
STUDY QUESTION Are maternal plasma concentrations of perfluoroalkyl and polyfluoroalkyl substances (PFASs) during pregnancy associated with anogenital distance (AGD) in male infants at birth, 6, and 12 months of age? SUMMARY ANSWER Higher maternal plasma concentrations of some PFASs were associated with shorter AGD in male infants at birth and 6 months of age. WHAT IS KNOWN ALREADY Two animal studies have found that exposure to PFASs was associated with shorter AGD in male rat fetuses and wild male minks. There is only one human study on the topic that did not identify consistent patterns between maternal serum concentrations of PFASs during pregnancy and AGD in male infants. STUDY DESIGN, SIZE, DURATION In the prospective cohort study, a total of 1292 eligible pregnant women were recruited at 12-16 weeks of gestation between April and December 2012 at the Maternal and Child Health Hospital of Minhang district in Shanghai, China. At delivery, 667 male singletons were born. They were then followed up at birth (n = 439) and at 6 (n = 411) and 12 months (n = 376) of age when anopenile distance (AGDAP) and anoscrotal distance (AGDAS) were measured. PARTICIPANTS/MATERIALS, SETTING, METHODS A total of 500 male infants who had both maternal plasma concentrations of PFASs and at least one AGD measurement of at three time points were included in the present study. Multiple linear regression models were used to evaluate the potential linear associations between maternal concentrations of PFASs and AGD. MAIN RESULTS AND THE ROLE OF CHANCE Maternal plasma concentrations (ln-transformed) of perfluorooctane sulfonate (PFOS), perfluorodecanoic acid (PFDA), and perfluoroundecanoic acid (PFUdA) were inversely associated with AGDAS or AGDAP at birth (AGDAS: per ln unit increase in PFAS concentrations: β (95% CI): -0.65 (-1.27 to -0.02) mm for PFOS; -0.58 (-1.11 to -0.06) mm for PFDA; and -0.57 (-1.09 to -0.06) mm for PFUdA; AGDAP: per ln unit increase in PFAS concentrations: β (95% CI): -0.63 (-1.24 to -0.01) mm for PFDA and - 0.76 (-1.36 to -0.16) mm for PFUdA). At 6 months of age, per unit increase in maternal ln concentrations of PFOS and perfluorotridecanoic acid (PFTrDA), AGDAS decreased on average by -2.21 (95% CI: -4.28 to -0.14) and -1.11 (95% CI: -2.17 to -0.06) mm, respectively. Additionally, ln-transformed perfluorooctanoic acid (PFOA) showed nonsignificant but inverse associations with both AGDAS and AGDAP at 6 months of age. We found no significant associations between ln-transformed maternal concentrations of PFASs and either AGDAS or AGDAP at 12 months of age. However, significantly inverse association of ln-transformed PFOA with AGDAP was observed in male infants who never or shortly breastfed (<3 months) at 12 months of age. LIMITATIONS, REASONS FOR CAUTION AGD measurements were performed by different examiners at each follow-up visit, and the intra-examiner variation was not assessed, which might cause intra-rater and inter-rater measurement errors. Additionally, our study may have selection bias since a considerable number of participants withdrew from the cohort although the differences in demographic characteristics were not statistically significant between included mother-infant pairs and those excluded. No statistical correction was made for multiple comparisons. WIDER IMPLICATIONS OF THE FINDINGS Our findings may have important implications for the early development of genital health in male infants since PFASs can be detected in almost all pregnant women and infants worldwide. STUDY FUNDING/COMPETING INTEREST(S) This study was supported by grants from the National Key Research and Development program of China (2018YFC1002801 and 2016YFC1000505), the Science and Technology Commission of Shanghai Municipality (16ZR1430100), the National Natural Science Foundation of China (81428011), and the Innovation-Oriented Science and Technology Grant from National Health Commission Key Laboratory of Reproduction Regulation (CX2017-06). The authors have no conflicts of interest to declare. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Youping Tian
- National Health Commission Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Public Health, Fudan University, 779 Old Hu Min Road, Shanghai, China
| | - Hong Liang
- National Health Commission Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Public Health, Fudan University, 779 Old Hu Min Road, Shanghai, China
| | - Maohua Miao
- National Health Commission Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Public Health, Fudan University, 779 Old Hu Min Road, Shanghai, China
| | - Fen Yang
- National Health Commission Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Public Health, Fudan University, 779 Old Hu Min Road, Shanghai, China
| | - Honglei Ji
- National Health Commission Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Public Health, Fudan University, 779 Old Hu Min Road, Shanghai, China
| | - Wencheng Cao
- National Reference Laboratory of Dioxin, Institute of Health Inspection and Detection, Hubei Provincial Academy of Preventive Medicine, Hubei Provincial Center for Disease Control and Prevention, #6 Zhuo Daoquan North Road, Wuhan, China
| | - Xiaofang Liu
- National Reference Laboratory of Dioxin, Institute of Health Inspection and Detection, Hubei Provincial Academy of Preventive Medicine, Hubei Provincial Center for Disease Control and Prevention, #6 Zhuo Daoquan North Road, Wuhan, China
| | - Xiaotian Zhang
- National Reference Laboratory of Dioxin, Institute of Health Inspection and Detection, Hubei Provincial Academy of Preventive Medicine, Hubei Provincial Center for Disease Control and Prevention, #6 Zhuo Daoquan North Road, Wuhan, China
| | - Aimin Chen
- Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, 160 Panzeca Way, Cincinnati, OH, USA
| | - Hong Xiao
- Department of Pharmaceutical Outcomes and Policy, College of Pharmacy, University of Florida, 1225 Center Drive, Gainesville, FL, USA
| | - Hui Hu
- Department of Epidemiology, College of Public Health and Health Professions and College of Medicine, University of Florida, 2004 Mowry Road, Gainesville, FL, USA
| | - Wei Yuan
- National Health Commission Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Public Health, Fudan University, 779 Old Hu Min Road, Shanghai, China
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Amstislavsky SY, Brusentsev EY, Petrova OM, Naprimerov VA, Levinson AL. Development and Aging of the Mammalian Reproductive System. Russ J Dev Biol 2020. [DOI: 10.1134/s1062360420010075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Wan HT, Lai KP, Wong CKC. Comparative Analysis of PFOS and PFOA Toxicity on Sertoli Cells. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:3465-3475. [PMID: 32119782 DOI: 10.1021/acs.est.0c00201] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Perfluoroalkyl chemicals induce male reproductive toxicity. Current evidence showed the effects of the chemical exposure on the deterioration of testicular functions, and reduction in epididymal sperm counts. Previous studies showed that PFOA and PFOS displayed a high correlation with each other in seminal plasma levels, but induced different effects on semen variables. In this study, we focused on the comparative toxicity analysis of PFOA and PFOS, using a rat primary Sertoli cell model. Our transcriptomic data showed that PFOA and PFOS treatments (40 μM) perturbed global gene expression. While PFOS induced higher toxicity in affecting cytoskeleton signaling, Sertoli cell-cell junction, and inflammation, underlined by Ingenuity pathway analysis. Immunocytochemical staining revealed that PFOS treatment (40 and 80 μM) induced truncated actin filament and disorganized bundled configuration in the cell cytoplasm. Moreover, disorganized distribution of N-cadherin (N-cad) and β-catenin (β-cat), and defragmentation of ZO-1 at the Sertoli cell-cell interface was evident. At 80 μM of PFOS, cytoplasmic distribution of N-cad, β-cat, and ZO-1 were observed. We then examined whether resveratrol, a polyphenol antioxidant, was able to protect the cells from PFOS toxicity. The pretreatment of Sertoli cells with 10 μM resveratrol prevented the formation of truncated actin filament and dis-localization of β-cat. Western blot analysis showed that Res pretreatment increased the levels of basal ES proteins (N-cad and β-cat), tight junction proteins (ZO-1 and occludin), and gap junction protein, versus control.
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Affiliation(s)
- Hin Ting Wan
- Croucher Institute for Environmental Sciences, Department of Biology, Hong Kong Baptist University, Hong Kong SAR, P. R. China
| | - Keng Po Lai
- Guanxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, P. R. China
| | - Chris Kong Chu Wong
- Croucher Institute for Environmental Sciences, Department of Biology, Hong Kong Baptist University, Hong Kong SAR, P. R. China
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Endocrine Disruptors in Water and Their Effects on the Reproductive System. Int J Mol Sci 2020; 21:ijms21061929. [PMID: 32178293 PMCID: PMC7139484 DOI: 10.3390/ijms21061929] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/04/2020] [Accepted: 03/06/2020] [Indexed: 12/12/2022] Open
Abstract
Anthropogenic contaminants in water can impose risks to reproductive health. Most of these compounds are known to be endocrine disrupting chemicals (EDCs). EDCs can impact the endocrine system and subsequently impair the development and fertility of non-human animals and humans. The source of chemical contamination in water is diverse, originating from byproducts formed during water disinfection processes, release from industry and livestock activity, or therapeutic drugs released into sewage. This review discusses the occurrence of EDCs in water such as disinfection byproducts, fluorinated compounds, bisphenol A, phthalates, pesticides, and estrogens, and it outlines their adverse reproductive effects in non-human animals and humans.
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Lee JW, Choi K, Park K, Seong C, Yu SD, Kim P. Adverse effects of perfluoroalkyl acids on fish and other aquatic organisms: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 707:135334. [PMID: 31874399 DOI: 10.1016/j.scitotenv.2019.135334] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/29/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
Perfluoroalkyl acids (PFAAs) have been widely used in many industrial and consumer products. They have been detected ubiquitously in ambient water along with other environmental matrices, and their adverse effects on aquatic organisms have been a subject of active investigation. Here, we intended to summarize and synthesize the existing body of knowledge on PFAA toxicity through an extensive literature review, and shed light on areas where further research is warranted. PFAA toxicity appears to be influenced by the sex and developmental stages of aquatic organisms, but not significantly by exposure route. PFAA-induced aquatic toxicity could be classified as metabolism disturbance, reproduction disruption, oxidative stress, developmental toxicity, thyroid disruption, etc. At the molecular level, these responses can be initiated by key events, such as nuclear receptor activation, reactive oxygen species induction, or interaction with a membrane, followed by a cascade of downstream responses. PFAA-induced toxicity involves diverse metabolic processes, and therefore elucidating crosstalk or interactions among diverse metabolic pathways is a challenging task. In the presence of other chemicals, PFAAs can function as agonists or antagonists, resulting in different directions of combined toxicity. Therefore, mixture toxicity with other groups of chemicals is another research opportunity. Experimental evidence supports the trans-generational toxicity of PFAAs, suggesting that their long-term consequences for aquatic ecosystems should become of concern. A recent global ban of several PFAAs resulted in an increasing dependence on PFAA alternatives. The lack of sufficient toxicological information on this emerging group of chemicals warrant caution and rigorous toxicological assessments.
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Affiliation(s)
- Jin Wuk Lee
- Research Department of Environmental Health, National Institute of Environmental Research, Incheon 404-708, Republic of Korea
| | - Kyungho Choi
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Republic of Korea
| | - Kyunghwa Park
- Research Department of Environmental Health, National Institute of Environmental Research, Incheon 404-708, Republic of Korea
| | - Changho Seong
- Research Department of Environmental Health, National Institute of Environmental Research, Incheon 404-708, Republic of Korea
| | - Seung Do Yu
- Research Department of Environmental Health, National Institute of Environmental Research, Incheon 404-708, Republic of Korea
| | - Pilje Kim
- Research Department of Environmental Health, National Institute of Environmental Research, Incheon 404-708, Republic of Korea.
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Temkin AM, Hocevar BA, Andrews DQ, Naidenko OV, Kamendulis LM. Application of the Key Characteristics of Carcinogens to Per and Polyfluoroalkyl Substances. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E1668. [PMID: 32143379 PMCID: PMC7084585 DOI: 10.3390/ijerph17051668] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 01/09/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) constitute a large class of environmentally persistent chemicals used in industrial and consumer products. Human exposure to PFAS is extensive, and PFAS contamination has been reported in drinking water and food supplies as well as in the serum of nearly all people. The most well-studied member of the PFAS class, perfluorooctanoic acid (PFOA), induces tumors in animal bioassays and has been associated with elevated risk of cancer in human populations. GenX, one of the PFOA replacement chemicals, induces tumors in animal bioassays as well. Using the Key Characteristics of Carcinogens framework for cancer hazard identification, we considered the existing epidemiological, toxicological and mechanistic data for 26 different PFAS. We found strong evidence that multiple PFAS induce oxidative stress, are immunosuppressive, and modulate receptor-mediated effects. We also found suggestive evidence indicating that some PFAS can induce epigenetic alterations and influence cell proliferation. Experimental data indicate that PFAS are not genotoxic and generally do not undergo metabolic activation. Data are currently insufficient to assess whether any PFAS promote chronic inflammation, cellular immortalization or alter DNA repair. While more research is needed to address data gaps, evidence exists that several PFAS exhibit one or more of the key characteristics of carcinogens.
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Affiliation(s)
- Alexis M. Temkin
- Environmental Working Group, Washington, DC 20009, USA; (D.Q.A.); (O.V.N.)
| | - Barbara A. Hocevar
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, Bloomington, IN 47405, USA; (B.A.H.); (L.M.K.)
| | - David Q. Andrews
- Environmental Working Group, Washington, DC 20009, USA; (D.Q.A.); (O.V.N.)
| | - Olga V. Naidenko
- Environmental Working Group, Washington, DC 20009, USA; (D.Q.A.); (O.V.N.)
| | - Lisa M. Kamendulis
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, Bloomington, IN 47405, USA; (B.A.H.); (L.M.K.)
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Yuan Y, Ding X, Cheng Y, Kang H, Luo T, Zhang X, Kuang H, Chen Y, Zeng X, Zhang D. PFOA evokes extracellular Ca 2+ influx and compromises progesterone-induced response in human sperm. CHEMOSPHERE 2020; 241:125074. [PMID: 31627108 DOI: 10.1016/j.chemosphere.2019.125074] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 10/03/2019] [Accepted: 10/07/2019] [Indexed: 06/10/2023]
Abstract
Perfluorooctane acid (PFOA), a persistent organic pollutant, is ubiquitously present in the environment and may detrimentally affect male reproductive health. In this study, mature human sperm were in vitro exposed to different concentrations of PFOA (0.25, 2.5 or 25 μg/ml) alone or in combination with progesterone (P4) to evaluate the toxicity and the potential mechanism of action. Exposure to high-dose PFOA (25 μg/ml) alone for 4 h caused a decline in capacity of human spermatozoa to penetrate synthetic mucus, with an increased production of reactive oxygen species (ROS). Furthermore, PFOA treatment (2.5 and 25 μg/ml) evoked a transient rise in intracellular calcium concentration [Ca2+]i by activating the sperm-specific CatSper channel. However, preincubation with PFOA (2.5-25 μg/ml) for 4 h significantly suppressed P4-stimulated extracellular Ca2+ influx in human spermatozoa. Moreover, PFOA pretreatment at all concentrations evaluated markedly compromised P4-induced acrosome reaction and sperm penetration into viscous medium. Taken together, these results suggest that PFOA exposure may impair human sperm function through inducing oxidative stress and disturbing P4-induced Ca2+ signaling.
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Affiliation(s)
- Yangyang Yuan
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Xinbao Ding
- Department of Biomedical Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Yimin Cheng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Hang Kang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Xiaoning Zhang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Haibin Kuang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Ying Chen
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Xuhui Zeng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China.
| | - Dalei Zhang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China.
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Wu Y, Wei Z, Li Y, Wei C, Li Y, Cheng P, Xu H, Li Z, Guo R, Qi X, Jia J, Jia Y, Wang W, Gao X. Perturbation of Ephrin Receptor Signaling and Glutamatergic Transmission in the Hypothalamus in Depression Using Proteomics Integrated With Metabolomics. Front Neurosci 2019; 13:1359. [PMID: 31920518 PMCID: PMC6928102 DOI: 10.3389/fnins.2019.01359] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 12/02/2019] [Indexed: 12/16/2022] Open
Abstract
Hypothalamic dysfunction is a key pathological factor in inflammation-associated depression. In the present study, isobaric tags for relative-absolute quantitation (iTRAQ) combined with mass spectrometry and gas chromatography-mass spectrometry (GC-MS) were employed to detect the proteomes and metabolomes in the hypothalamus of the lipopolysaccharide (LPS)-induced depression mouse, respectively. A total of 187 proteins and 27 metabolites were differentially expressed compared with the control group. Following the integration of bi-omics data, pertinent pathways and molecular interaction networks were further identified. The results indicated altered molecules were clustered into Ephrin receptor signaling, glutamatergic transmission, and inflammation-related signaling included the LXR/RXR activation, FXR/RXR activation, and acute phase response signaling. First discovered in the hypothalamus, Ephrin receptor signaling regulates N-methyl-D-aspartate receptor (NMDAR)-predominant glutamatergic transmission, and further acted on AKT signaling that contributed to changes in hypothalamic neuroplasticity. Ephrin type-B receptor 2 (EPHB2), a transmembrane receptor protein in Ephrin receptor signaling, was significantly elevated and interacted with the accumulated NMDAR subunit GluN2A in the hypothalamus. Additionally, molecules involved in synaptic plasticity regulation, such as hypothalamic postsynaptic density protein-95 (PSD-95), p-AKT and brain-derived neurotrophic factor (BDNF), were significantly altered in the LPS-induced depressed group. It might be an underlying pathogenesis that the EPHB2-GluN2A-AKT cascade regulates synaptic plasticity in depression. EPHB2 can be a potential therapeutic target in the correction of glutamatergic transmission dysfunction. In summary, our findings point to the previously undiscovered molecular underpinnings of the pathophysiology in the hypothalamus of inflammation-associated depression and offer potential targets to develop antidepressants.
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Affiliation(s)
- Yu Wu
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China.,Gansu Provincial Biobank and Bioinformation Engineering Research Center, Lanzhou, China
| | - Zhenhong Wei
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China.,Gansu Provincial Biobank and Bioinformation Engineering Research Center, Lanzhou, China
| | - Yonghong Li
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China.,Gansu Provincial Biobank and Bioinformation Engineering Research Center, Lanzhou, China
| | - Chaojun Wei
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China.,Gansu Provincial Biobank and Bioinformation Engineering Research Center, Lanzhou, China
| | - Yuanting Li
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Pengfei Cheng
- Department of Neurology, The First Affiliated Hospital of Jiamusi University, Jiamusi, China
| | - Hui Xu
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Zhenhao Li
- NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Rui Guo
- NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Xiaoming Qi
- NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Jing Jia
- NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Yanjuan Jia
- NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Wanxia Wang
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China
| | - Xiaoling Gao
- The Institute of Clinical Research and Translational Medicine, Gansu Provincial Hospital, Lanzhou, China.,NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor, Gansu Provincial Hospital, Lanzhou, China.,Gansu Provincial Biobank and Bioinformation Engineering Research Center, Lanzhou, China
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Pan Y, Cui Q, Wang J, Sheng N, Jing J, Yao B, Dai J. Profiles of Emerging and Legacy Per-/Polyfluoroalkyl Substances in Matched Serum and Semen Samples: New Implications for Human Semen Quality. ENVIRONMENTAL HEALTH PERSPECTIVES 2019; 127:127005. [PMID: 31841032 PMCID: PMC6957285 DOI: 10.1289/ehp4431] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 11/22/2019] [Accepted: 11/23/2019] [Indexed: 05/22/2023]
Abstract
BACKGROUND Epidemiological evidence remains equivocal on the associations between environmentally relevant levels of per-/polyfluoroalkyl substances (PFASs) and human semen quality. OBJECTIVES We aimed to test whether the potential effects on semen quality could be better observed when seminal PFAS levels were used as an exposure marker compared with serum PFAS levels. METHODS Matched semen and serum samples from 664 adult men were collected from a cross-sectional population in China from 2015 to 2016. Multiple semen parameters were assessed, along with measurement of 16 target PFASs in semen and serum. Partitioning between semen and serum was evaluated by the ratio of matrix-specific PFAS concentrations. Regression model results were expressed as the difference in each semen parameter associated with the per unit increase in the ln-transformed PFAS level after adjusting for confounders. RESULTS Perfluorooctanoate (PFOA), perfluorooctane sulfonate (PFOS), and emerging chlorinated polyfluorinated ether sulfonate (6:2 Cl-PFESA) were detected at their highest concentrations in both semen and serum, with median concentrations of 0.23, 0.10, and 0.06 ng/mL in semen, respectively, and a semen-to-serum ratio of 1.3:3.1. The between-matrix correlations of these PFAS concentrations were high (R=0.70-0.83). Seminal PFOA, PFOS, and 6:2 Cl-PFESA levels were significantly associated with a lower percentage of progressive sperm and higher percentage of DNA fragmentation (false discovery rate-adjusted p-values of<0.05). Associations between serum PFAS levels and semen parameters were generally statistically weaker, except for DNA stainability, which was more strongly associated with serum-based PFASs than with semen-based PFASs. CONCLUSIONS Our results suggest the potential for deleterious effects following exposure to 6:2 Cl-PFESA and other PFASs. Compared with serum PFAS levels, the much clearer association of seminal PFAS levels with semen parameters suggests its advantage in hazard assessment on semen quality, although the potential for confounding might be higher. Exposure measurements in target tissue may be critical in clarifying effects related to PFAS exposure. https://doi.org/10.1289/EHP4431.
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Affiliation(s)
- Yitao Pan
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Reproductive Medicine, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Qianqian Cui
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Jinghua Wang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Nan Sheng
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Jun Jing
- Reproductive Medical Center, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Bing Yao
- Reproductive Medical Center, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Jiayin Dai
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Reproductive Medicine, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
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Micro solid-phase extraction for the analysis of per- and polyfluoroalkyl substances in environmental waters. J Chromatogr A 2019; 1604:460495. [DOI: 10.1016/j.chroma.2019.460495] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/23/2019] [Accepted: 08/27/2019] [Indexed: 01/08/2023]
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Gong X, Yang C, Hong Y, Chung ACK, Cai Z. PFOA and PFOS promote diabetic renal injury in vitro by impairing the metabolisms of amino acids and purines. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 676:72-86. [PMID: 31029902 DOI: 10.1016/j.scitotenv.2019.04.208] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 04/12/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Environmental pollutants, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), are common surfactants in various consumer products. Epidemiological studies have demonstrated the association of diabetic kidney diseases with PFOA and PFOS. However, mechanisms of metabolic alterations involved are still unclear. METHODS Considering their involvement of glomerular hemodynamics, rat mesangial cells (MCs) are used as an in vitro model of diabetic kidney diseases for exposure to PFOS/PFOA under diabetic condition. Non-targeted metabolomics studies based on liquid chromatography-high resolution mass spectrometry were conducted to determine how PFOA/PFOS promoted fibrotic and proinflammatory responses in the MCs under diabetic condition. RESULTS Exposure of PFOA/PFOS (10 μM) increased oxidative stress and the levels of fibrotic and proinflammatory markers in MCs under diabetic condition. We demonstrated for the first time that PFOA and PFOS altered amino acid biosynthesis, citrate cycle, and purine metabolism in MCs under diabetic condition. Compared with diabetic condition, the exposure of PFOA and PFOS under diabetic condition more significantly altered the levels of 13 intracellular metabolites, including L-tyrosine, L-phenylalanine, L-arginine, L-tryptophan, AMP, ADP, UMP, inosine, and hypoxanthine, which have been reported to be related to kidney injury. In addition, PFOA/PFOS treatment significantly altered the expression levels of key enzymes involved in these metabolisms. Treatment with L-tyrosine, L-phenylalanine, L-arginine, and L-tryptophan reduced the levels of fibrotic and inflammatory markers induced by PFOA/PFOS. CONCLUSION Our results suggest that under diabetic condition, exposure of PFOA or PFOS aggravated diabetic kidney injury in vitro by impairing metabolisms of amino acids and purines to induce more fibrosis and inflammation in MCs.
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Affiliation(s)
- Xun Gong
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; HKBU Institute for Research and Continuing Education, Shenzhen, China
| | - Chunxue Yang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Yanjun Hong
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; HKBU Institute for Research and Continuing Education, Shenzhen, China
| | - Arthur C K Chung
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; HKBU Institute for Research and Continuing Education, Shenzhen, China.
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; HKBU Institute for Research and Continuing Education, Shenzhen, China
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