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Zhang W, Xue Z, Cao Q, Zong Y, Li X, Ma Y, Jia C, Liu C, Ding N, Wang R. Characterization of medaka (Oryzias latipes) AHRs and the comparison of two model fishes-Medaka vs. zebrafish: The subform-specific sensitivity to dioxin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 945:174136. [PMID: 38901578 DOI: 10.1016/j.scitotenv.2024.174136] [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: 04/12/2024] [Revised: 06/16/2024] [Accepted: 06/17/2024] [Indexed: 06/22/2024]
Abstract
Dioxins and the emerging dioxin-like compounds (DLCs) have recruited increasing concerns about their environmental contamination, toxicity, health impacts, and mechanisms. Based on the structural similarity of dioxins and many DLCs, their toxicity was predominantly mediated by the dioxin receptor (aryl hydrocarbon receptor, AHR) in animals (including human), which can be different in expression and function among species and then possibly produce the species-specific risk or toxicity. To date, characterizing the AHR of additional species other than human and rodents can increase the accuracy of toxicity/risk evaluation and increase knowledge about AHR biology. As a key model, the medaka AHR has not been clearly characterized. Through genome survey and phylogenetic analysis, we identified four AHRs (olaAHR1a, olaAHR1b, olaAHR2a, and olaAHR2b) and two ARNTs (olaARNT1 and olaARNT2). The medaka AHR pathway was conserved in expression in nine tested tissues, of which olaAHR2a represented the predominant subform with greater abundance. Medaka AHRs and ARNTs were functional and could be efficiently transactivated by the classical dioxin congener 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), although olaAHR1a did not seem to cooperate with olaARNT2. In terms of function/sensitivity, the EC50 values of medaka olaAHR1a (9.01 ± 1.43 nM), olaAHR1b (4.00 ± 1.10 nM), olaAHR2a (8.75 ± 3.34 nM), and olaAHR2b (3.06 ± 0.81 nM) showed slight differences; however, they were all at the nM level. The sensitivity of four medaka AHRs to TCDD was similar to that of zebrafish dreAHR2 (the dominant form, EC50 = 3.14 ± 4.19 nM), but these medaka AHRs were more sensitive than zebrafish dreAHR1b (EC50 = 27.05 ± 18.51 nM). The additional comparison also indicated that the EC50 values in various species were usually within the nM range, but AHRs of certain subforms/species can vary by one or two orders of magnitude. In summary, the present study will enhance the understanding of AHR and help improve research on the ecotoxicity of dioxins/DLCs.
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Affiliation(s)
- Wanglong Zhang
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China.
| | - Zhenhong Xue
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China
| | - Qining Cao
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China
| | - Yanjiao Zong
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China
| | - Xingyang Li
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China
| | - Yongchao Ma
- Department of Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Chuanxing Jia
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China
| | - Chunchen Liu
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China
| | - Ning Ding
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China.
| | - Renjun Wang
- College of Life Sciences, Qufu Normal University, Qufu, Shandong 273165, China
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Zhao Y, Xing C, Deng Y, Ye C, Peng H. HIF-1α signaling: Essential roles in tumorigenesis and implications in targeted therapies. Genes Dis 2024; 11:234-251. [PMID: 37588219 PMCID: PMC10425810 DOI: 10.1016/j.gendis.2023.02.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 11/24/2022] [Accepted: 02/12/2023] [Indexed: 08/18/2023] Open
Abstract
The hypoxic microenvironment is an essential characteristic of most malignant tumors. Notably, hypoxia-inducible factor-1 alpha (HIF-1α) is a key regulatory factor of cellular adaptation to hypoxia, and many critical pathways are correlated with the biological activity of organisms via HIF-1α. In the intra-tumoral hypoxic environment, HIF-1α is highly expressed and contributes to the malignant progression of tumors, which in turn results in a poor prognosis in patients. Recently, it has been indicated that HIF-1α involves in various critical processes of life events and tumor development via regulating the expression of HIF-1α target genes, such as cell proliferation and apoptosis, angiogenesis, glucose metabolism, immune response, therapeutic resistance, etc. Apart from solid tumors, accumulating evidence has revealed that HIF-1α is also closely associated with the development and progression of hematological malignancies, such as leukemia, lymphoma, and multiple myeloma. Targeted inhibition of HIF-1α can facilitate an increased sensitivity of patients with malignancies to relevant therapeutic agents. In the review, we elaborated on the basic structure and biological functions of HIF-1α and summarized their current role in various malignancies. It is expected that they will have future potential for targeted therapy.
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Affiliation(s)
- Yan Zhao
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Cheng Xing
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Yating Deng
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Can Ye
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Hongling Peng
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
- Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
- Hunan Engineering Research Center of Cell Immunotherapy for Hematopoietic Malignancies, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
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Korbecki J, Simińska D, Gąssowska-Dobrowolska M, Listos J, Gutowska I, Chlubek D, Baranowska-Bosiacka I. Chronic and Cycling Hypoxia: Drivers of Cancer Chronic Inflammation through HIF-1 and NF-κB Activation: A Review of the Molecular Mechanisms. Int J Mol Sci 2021; 22:ijms221910701. [PMID: 34639040 PMCID: PMC8509318 DOI: 10.3390/ijms221910701] [Citation(s) in RCA: 116] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 09/28/2021] [Accepted: 10/01/2021] [Indexed: 12/12/2022] Open
Abstract
Chronic (continuous, non-interrupted) hypoxia and cycling (intermittent, transient) hypoxia are two types of hypoxia occurring in malignant tumors. They are both associated with the activation of hypoxia-inducible factor-1 (HIF-1) and nuclear factor κB (NF-κB), which induce changes in gene expression. This paper discusses in detail the mechanisms of activation of these two transcription factors in chronic and cycling hypoxia and the crosstalk between both signaling pathways. In particular, it focuses on the importance of reactive oxygen species (ROS), reactive nitrogen species (RNS) together with nitric oxide synthase, acetylation of HIF-1, and the action of MAPK cascades. The paper also discusses the importance of hypoxia in the formation of chronic low-grade inflammation in cancerous tumors. Finally, we discuss the effects of cycling hypoxia on the tumor microenvironment, in particular on the expression of VEGF-A, CCL2/MCP-1, CXCL1/GRO-α, CXCL8/IL-8, and COX-2 together with PGE2. These factors induce angiogenesis and recruit various cells into the tumor niche, including neutrophils and monocytes which, in the tumor, are transformed into tumor-associated neutrophils (TAN) and tumor-associated macrophages (TAM) that participate in tumorigenesis.
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Affiliation(s)
- Jan Korbecki
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72 Av., 70-111 Szczecin, Poland; (J.K.); (D.S.); (I.G.); (D.C.)
| | - Donata Simińska
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72 Av., 70-111 Szczecin, Poland; (J.K.); (D.S.); (I.G.); (D.C.)
| | - Magdalena Gąssowska-Dobrowolska
- Department of Cellular Signalling, Mossakowski Medical Research Institute, Polish Academy of Sciences, Pawińskiego 5, 02-106 Warsaw, Poland;
| | - Joanna Listos
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodźki 4a St., 20-093 Lublin, Poland;
| | - Izabela Gutowska
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72 Av., 70-111 Szczecin, Poland; (J.K.); (D.S.); (I.G.); (D.C.)
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72 Av., 70-111 Szczecin, Poland; (J.K.); (D.S.); (I.G.); (D.C.)
| | - Irena Baranowska-Bosiacka
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72 Av., 70-111 Szczecin, Poland; (J.K.); (D.S.); (I.G.); (D.C.)
- Correspondence: ; Tel.: +48-(91)-466-1515
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Cho MK, Park JG, Iwata H, Kim EY. 2,3,7,8-Tetrachlorodibenzo-p-dioxin prompted differentiation to CD4 +CD8 -CD25 + and CD4 +CD8 +CD25 + Tregs and altered expression of immune-related genes in the thymus of chicken embryos. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 211:111947. [PMID: 33503546 DOI: 10.1016/j.ecoenv.2021.111947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/10/2021] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
The chicken (Gallus gallus), which has three aryl hydrocarbon receptor (AHR) isoforms (ckAHR1, ckAHR2, and ckAHR1β) and two AHR nuclear translocator (ARNT) isoforms (ckARNT1 and ckARNT2), is highly sensitive to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and can serve as an avian model to gain an understanding of the mechanism underlying dioxin toxicity. To elucidate the mechanism of TCDD-induced immunotoxicity in avian species, we treated chicken embryos in ovo with graded concentrations of TCDD (1.5, 2.5, 3.0, 3.3, 3.5, and 4.0 μM). Initially, we measured mRNA expression levels of ckAHR and ckARNT isoforms and analyzed the T cell populations and transcriptome in the thymuses of TCDD-treated chicken embryos. Quantitative polymerase chain reaction analysis revealed that mRNA expressions of ckAHR1 and ckARNT2 were dominant in the thymus. Severe weight loss and thymus atrophy were observed in the TCDD-treated embryos. Immunophenotyping analyses demonstrated significant increases in CD4+CD8-CD25+ and CD4+CD8+CD25+ regulatory T cells (Tregs) populations following TCDD exposure, suggesting that TCDD suppresses T cell-mediated immune responses in chicken embryos. In addition, thymic transcriptome analyses intimated that alteration of the signaling pathways related to erb-b2 receptor tyrosine kinase 4 (ERBB4) and wnt family member 5A (WNT5A), and bone morphogenetic protein (BMP) may be associated with the TCDD-induced thymus atrophy. We also observed significantly altered expression levels of genes including interleukine 13 receptor subunit alpha 2 (IL13RA2), transforming growth factor beta 1 (TGFβ1), collagen type III alpha 1 chain (COL3A1), and collagen type IX alpha 3 chain (COL9A3), implying immunosuppression, fibrosis development, and collagen deposition. Collectively, these findings suggest that TCDD exposure activates the ckAHR1-ckARNT2 signaling pathway and suppresses immune responses through the prompted differentiation to CD4+CD8-CD25+ and CD4+CD8+CD25+ Tregs and altered expressions of immune-related genes in the thymus of chicken embryos.
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Affiliation(s)
- Min-Kyung Cho
- Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Republic of Korea
| | - Jae-Gon Park
- Department of Life and Nanopharmaceutical Science, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Republic of Korea
| | - Hisato Iwata
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan
| | - Eun-Young Kim
- Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Republic of Korea; Department of Life and Nanopharmaceutical Science, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Republic of Korea.
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Hwang JH, Park JY, Park HJ, Bak SM, Hirano M, Iwata H, Park YS, Kim EY. Ecological factors drive natural selection pressure of avian aryl hydrocarbon receptor 1 genotypes. Sci Rep 2016; 6:27526. [PMID: 27283192 PMCID: PMC4901312 DOI: 10.1038/srep27526] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 05/20/2016] [Indexed: 01/26/2023] Open
Abstract
The aryl hydrocarbon receptor (AHR) mediates dioxin toxicities. Several studies have suggested that two amino acid residues corresponding to the 324th and 380th positions in the ligand binding domain (LBD) of the chicken AHR1 (Ile_Ser as high sensitivity, Ile_Ala as moderate sensitivity, and Val_Ala as low sensitivity), could be an important factor determining dioxin sensitivity in avian species. Here, we analyzed the association between ecological factors and AHR1 LBD genotypes of 113 avian species. Cluster analyses showed that 2 major clusters and sub-clusters of the cluster 3 were associated with specific AHR1 genotypes depending on the food, habitat, and migration of the animal. The majority of the species with Ile_Ala type were the Passeriformes, which are omnivorous or herbivorous feeders in the terrestrial environment. The species with Val_Ala type was primarily composed of raptors and waterbirds, which have been exposed to naturally occurring dioxins. An in vitro reporter gene assay revealed that the sensitivity to a natural dioxin, 1,3,7-tribromodibenzo-p-dioxin was in the order of Ile_Ser > Ile_Ala > Val_Ala. These results suggest that ecological factors related to the exposure of natural dioxins contribute to natural selection of the avian AHR1 genotype, which consequently leads to different sensitivity to man-made dioxins.
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Affiliation(s)
- Ji-Hee Hwang
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Jin-Young Park
- Nature Conservation Research Division, National Institute of Environmental Research, Hwangyoungro 42, Seo-Gu, Incheon 404-708, Korea
| | - Hae-Jeong Park
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Su-Min Bak
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Masashi Hirano
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan
| | - Hisato Iwata
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan
| | - Young-Suk Park
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Eun-Young Kim
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
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Effect of PCB 126 on aryl hydrocarbon receptor 1 (AHR1) and AHR1 nuclear translocator 1 (ARNT1) mRNA expression and CYP1 monooxygenase activity in chicken (Gallus domesticus) ovarian follicles. Toxicol Lett 2015; 239:73-80. [DOI: 10.1016/j.toxlet.2015.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 09/07/2015] [Indexed: 12/26/2022]
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Antos PA, Błachuta M, Hrabia A, Grzegorzewska AK, Sechman A. Expression of aryl hydrocarbon receptor 1 (AHR1), AHR1 nuclear translocator 1 (ARNT1) and CYP1 family monooxygenase mRNAs and their activity in chicken ovarian follicles following in vitro exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Toxicol Lett 2015; 237:100-11. [DOI: 10.1016/j.toxlet.2015.05.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 05/26/2015] [Accepted: 05/28/2015] [Indexed: 11/30/2022]
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Sechman A, Antos P, Katarzyńska D, Grzegorzewska A, Wojtysiak D, Hrabia A. Effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin on secretion of steroids and STAR, HSD3B and CYP19A1 mRNA expression in chicken ovarian follicles. Toxicol Lett 2014; 225:264-74. [DOI: 10.1016/j.toxlet.2013.12.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 12/19/2013] [Accepted: 12/20/2013] [Indexed: 11/29/2022]
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Lee JS, Iwabuchi K, Nomaru K, Nagahama N, Kim EY, Iwata H. Molecular and functional characterization of a novel aryl hydrocarbon receptor isoform, AHR1β, in the chicken (Gallus gallus). Toxicol Sci 2013; 136:450-66. [PMID: 23997109 DOI: 10.1093/toxsci/kft192] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Dioxins including 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) cause toxic effects through activation of the aryl hydrocarbon receptor (AHR)-mediated signaling pathway. Our previous studies have investigated the function of 2 AHR isoforms (AHR1 and AHR2) in avian species and identified a third AHR in the chicken (Gallus gallus) genome. Knowledge of multiple avian AHRs is indispensable to understand molecular mechanisms of AHR-mediated toxic effects and establish risk assessment framework for environmental AHR ligands in avian species. In this study, we successfully isolated a third novel AHR1-like cDNA from chicken and designated it as chicken AHR1 beta (ckAHR1β). The mRNA expression of ckAHR1β was primarily detected in the liver, and the hepatic protein expression was confirmed by Western blotting. Although mRNA expression of ckAHR1β was not altered by in ovo TCDD exposure, ckAHR1β exhibited specific binding to [(3)H]TCDD, TCDD-dependent nuclear translocation, and interaction with xenobiotic responsive elements (XREs) and AHR nuclear translocators (ARNTs). In vitro XRE-driven reporter gene assays revealed ckAHR1β-mediated transactivation of TCDD in a dose-dependent manner, showing a 10-fold reduced sensitivity (high EC50) compared with that mediated by ckAHR1. The mutation of Val(371) to Ser(371) in the ligand-binding domain of ckAHR1β shifted the TCDD-EC50 toward the value observed in ckAHR1, indicating the critical roles of the amino acid in sensitivity. Furthermore, ckAHR1β-mediated transactivation of TCDD was enhanced by 17β-estradiol (E2)-activated chicken estrogen receptor α (ckERα), suggesting a positive cross talk between ckERα and ckAHR1β signaling pathway. Both TCDD-induced and its enhanced activities by E2 were suppressed by the ckAHR repressor in a manner similar to ckAHR1. Collectively, our findings discover the role of ckAHR1β in dioxin toxicity and give an insight into the evolutionary history of the AHR signaling pathway.
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Affiliation(s)
- Jin-Seon Lee
- * Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan
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