Objective: Numerous evidence indicates the association between polychlorinated biphenyls (PCBs), an endocrine disrupter, with thyroid hormone disruption, contradictory findings also exist. Herein, we tried to address this question by performing a scoping review.
Content: The search was performed on PubMed, Scopus, Web of Science, and Google Scholar databases from 2010 onwards. Animal studies on PCBs' effect on thyroid function were searched. The SYRCLE's RoB scale assessed the risk of bias. I2 and Q tests are used for investigating heterogeneity. A random-effects model with the pooled standard means difference (SMD) and 95 % confidence interval (CI) was performed for the TSH, TT4, TT3, and FT4 outcomes using Comprehensive Meta-Analyses (CMA) Software version 3. Also, we conducted subgroup analyses based on the different types of PCB. The initial search identified 1,279 publications from the main databases 26 of them fulfilled our eligibility criteria for the study, and then five studies among selected studies had sufficient data for analysis. Meta-analysis of data revealed that Aroclor 1260 (SDM: -0.47, 95 % CI: -0.92, -0.01, p=0.044) and PCB 126 (SDM: 0.17, 95 % CI: -0.40, 0.75, p=0.559) significantly increased TSH concentration in the exposed groups vs. the control groups. Related to the effects of PCBs on the TT4, our findings indicated a significant reduction the TT4 concentration of animals exposed to Aroclor 1260 (SDM: -5.62, 95 % CI: -8.30, -2.94, p=0.0001), PCB 118 (SDM: -6.24, 95 % CI: -7.76, -4.72, p=0.0001), PCB 126 (SDM: -1.81, 95 % CI: -2.90, -0.71, p=0.001), and PCB 153 (SDM: -1.32, 95 % CI: -2.29, -0.35, p=0.007) vs. the controls. Our meta-analysis indicated a significant increase in TT3 concentration following exposure to PCB 118 and PCB 153 (SDM: -0.89, 95 % CI: -1.36, -0.42, p=0.0001, and SDM: -1.45, 95 % CI: -2.15, -0.75, p=0.0001, respectively). Aroclor 1254 and PCB 126 significantly decreased TT3 concentration (SDM: 1.25, 95 % CI: 0.29, 2.21, p=0.01 and SDM: 3.33, 95 % CI: 2.49, 4.18, p=0.0001, respectively). PCB 126 significantly decreased FT4 in the exposed groups vs. the control groups (SDM: -7.80, 95 % CI: -11.51, -5.35, p=0.0001).
Summary: Our findings showed an association between PCBs exposure and hypothyroidism in rodents, fish, and chicken embryos.
Outlook: Regarding to the most evidence of hypothyroidism effects of PCBs in animal species, it is necessary to consider large cohort studies to address the association between PCBs exposure and thyroid function impairment in humans.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1515/reveh-2022-0156 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Environmental and population influences on mummichog () gut microbiomes.
Microbiol Spectr
January 2025
Marine Chemistry & Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA.
Unlabelled: The mummichog, , an abundant estuarine fish broadly distributed along the eastern coast of North America, has repeatedly evolved tolerance to otherwise lethal levels of aromatic hydrocarbon exposure. This tolerance is linked to reduced activation of the aryl hydrocarbon receptor (AHR) signaling pathway. In other animals, the AHR has been shown to influence the gastrointestinal-associated microbial community, particularly when activated by the model toxic pollutant 3,3',4,4',5-pentachlorobiphenyl (PCB-126) and other dioxin-like compounds.
View Article and Find Full Text PDFEffect of polystyrene micro/nanoplastics on PCBs removal in constructed wetlands planted with Myriophyllum aquaticum.
Environ Res
January 2025
State Key Laboratory of Organic Geochemistry and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Electronic address:
The co-occurrence of microplastics (MPs) and nanoplastics (NPs) with polychlorinated biphenyls (PCBs) is an emerging environmental concern. Wetland plants, with their unique anaerobic-aerobic environments, offer a promising approach for PCBs removal. However, the impact of MPs and NPs on PCBs dynamics in constructed wetlands is not well understood.
View Article and Find Full Text PDFExposure to the Polychlorinated biphenyl mixture Aroclor 1254 elicits neurological and cardiac developmental effects in early life stage zebrafish (Danio rerio).
Chemosphere
February 2025
University of North Texas, Department of Biological Sciences and Advanced Environmental Research Institute, Denton, TX, 76203, USA. Electronic address:
The goal of this study was to compare the bioaccumulation of the PCB mixture Aroclor 1254 in zebrafish to cardiac and neurologic outcomes. The establishment of effect concentrations (ECs) for cardiac and neurotoxic effects of PCBs in early life stage fish is challenging due to a lack of measured PCB concentrations in test media (e.g.
View Article and Find Full Text PDFLow dose exposure to dioxins alters hepatic energy metabolism and steatotic liver disease development in a sex-specific manner.
Environ Int
December 2024
Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, Louisville, KY 40202, USA; University of Louisville (UofL) Superfund Research Center, University of Louisville, Louisville, KY 40202, USA; Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, School of Medicine, University of Louisville, Louisville, KY 40202, USA; The Hepatobiology & Toxicology Center, School of Medicine, University of Louisville, Louisville, KY 40202, USA; The Center for Integrative Environmental Health Sciences, University of Louisville, Louisville, KY 40202, USA. Electronic address:
Article Synopsis
- Dioxins, known persistent organic pollutants, are linked to heightened risks of steatotic liver disease (SLD), but their effects based on sex and mixtures are not well understood.
- In a study using low-fat diets, male and female mice were exposed to low doses of specific dioxins, revealing that females had more liver fat and elevated cholesterol levels due to increased gene expression related to fat synthesis.
- The findings showed that low-dose dioxin mixtures disrupt liver function, with female mice experiencing more significant metabolic disturbances compared to males, highlighting potential sex-dependent vulnerabilities.
The landscape of drug sensitivity and resistance in sarcoma.
Cell Stem Cell
October 2024
Department of Orthopaedic Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA; Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA, USA; Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA, USA. Electronic address:
Article Synopsis
- - Sarcomas are rare tumors with over 100 subtypes, making it challenging to find effective therapies; there's a need for personalized treatment approaches to enhance patient outcomes.
- - Patient-derived tumor organoids (PDTOs) were used to study drug resistance and sensitivity in sarcoma, analyzing 194 specimens from 126 patients across 24 subtypes.
- - The research developed a high-throughput screening method that provided results quickly and showed that drug sensitivity linked to tumor characteristics; 59% of samples matched with at least one effective FDA-approved treatment.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!