1
|
Dasmahapatra AK, Williams CB, Myla A, Tiwary SK, Tchounwou PB. A systematic review of the evaluation of endocrine-disrupting chemicals in the Japanese medaka ( Oryzias latipes) fish. FRONTIERS IN TOXICOLOGY 2023; 5:1272368. [PMID: 38090358 PMCID: PMC10711633 DOI: 10.3389/ftox.2023.1272368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/10/2023] [Indexed: 02/01/2024] Open
Abstract
Japanese medaka (Oryzias latipes) is an acceptable small laboratory fish model for the evaluation and assessment of endocrine-disrupting chemicals (EDCs) found in the environment. In this research, we used this fish as a potential tool for the identification of EDCs that have a significant impact on human health. We conducted an electronic search in PubMed (http://www.ncbi.nlm.nih.gov/pubmed) and Google Scholar (https://scholar.google.com/) using the search terms, Japanese medaka, Oryzias latipes, and endocrine disruptions, and sorted 205 articles consisting of 128 chemicals that showed potential effects on estrogen-androgen-thyroid-steroidogenesis (EATS) pathways of Japanese medaka. From these chemicals, 14 compounds, namely, 17β-estradiol (E2), ethinylestradiol (EE2), tamoxifen (TAM), 11-ketotestosterone (11-KT), 17β-trenbolone (TRB), flutamide (FLU), vinclozolin (VIN), triiodothyronine (T3), perfluorooctanoic acid (PFOA), tetrabromobisphenol A (TBBPA), terephthalic acid (TPA), trifloxystrobin (TRF), ketoconazole (KTC), and prochloraz (PCZ), were selected as references and used for the identification of apical endpoints within the EATS modalities. Among these endpoints, during classification, priorities are given to sex reversal (masculinization of females and feminization of males), gonad histology (testis-ova or ovotestis), secondary sex characteristics (anal fin papillae of males), plasma and liver vitellogenin (VTG) contents in males, swim bladder inflation during larval development, hepatic vitellogenin (vtg) and choriogenin (chg) genes in the liver of males, and several genes, including estrogen-androgen-thyroid receptors in the hypothalamus-pituitary-gonad/thyroid axis (HPG/T). After reviewing 205 articles, we identified 108 (52.68%), 46 (22.43%), 19 (9.26%), 22 (17.18%), and 26 (12.68%) papers that represented studies on estrogen endocrine disruptors (EEDs), androgen endocrine disruptors (AEDs), thyroid endocrine disruptors (TEDs), and/or steroidogenesis modulators (MOS), respectively. Most importantly, among 128 EDCs, 32 (25%), 22 (17.18%), 15 (11.8%), and 14 (10.93%) chemicals were classified as EEDs, AEDs, TEDs, and MOS, respectively. We also identified 43 (33.59%) chemicals as high-priority candidates for tier 2 tests, and 13 chemicals (10.15%) show enough potential to be considered EDCs without any further tier-based studies. Although our literature search was unable to identify the EATS targets of 45 chemicals (35%) studied in 60 (29.26%) of the 205 articles, our approach has sufficient potential to further move the laboratory-based research data on Japanese medaka for applications in regulatory risk assessments in humans.
Collapse
Affiliation(s)
- Asok K. Dasmahapatra
- RCMI Center for Environmental Health, Jackson State University, Jackson, MS, United States
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS, United States
| | - Charmonix B. Williams
- RCMI Center for Environmental Health, Jackson State University, Jackson, MS, United States
| | - Anitha Myla
- RCMI Center for Environmental Health, Jackson State University, Jackson, MS, United States
| | - Sanjay K. Tiwary
- RCMI Center for Environmental Health, Jackson State University, Jackson, MS, United States
| | - Paul. B. Tchounwou
- RCMI Center for Environmental Health, Jackson State University, Jackson, MS, United States
- RCMI Center for Urban Health Disparities Research and Innovation, Morgan State University, Baltimore, MD, United States
| |
Collapse
|
2
|
Hicks KA, Fuzzen MLM, Dhiyebi HA, Bragg LM, Marjan P, Cunningham J, McMaster ME, Srikanthan N, Nikel KE, Arlos MJ, Servos MR. Intersex manifestation in the rainbow darter (Etheostoma caeruleum): Are adult male fish susceptible to developing and recovering from intersex after exposure to endocrine active compounds? AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 261:106636. [PMID: 37487446 DOI: 10.1016/j.aquatox.2023.106636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 07/26/2023]
Abstract
For over a decade, intersex has been observed in rainbow darter (RD) (Etheostoma caeruleum) populations living downstream wastewater treatment plants (WWTPs) in the Grand River, Ontario, Canada. To further our understanding of intersex development in adult male fish, the current study addressed three objectives: i) can intersex be induced in adult male fish, ii) is there a specific window of exposure when adult male fish are more susceptible to developing intersex, and iii) can pre-exposed adult male fish recover from intersex? To assess intersex induction in adult male fish, wild male RD were exposed in the laboratory for 22 weeks (during periods of spawning, gonadal regression, and gonadal recrudescence) to environmentally relevant concentrations of 17α-ethinylestradiol (EE2) including nominal 0, 1, and 10 ng/L. Intersex rates and severity at 10 ng/L EE2 were similar to those observed historically in adult male populations living downstream WWTPs in the Grand River and confirmed previous predictions that 1-10 ng/L EE2 would cause these adverse effects. To assess a window of sensitivity in developing intersex, male RD were exposed to nominal 0, 1 or 10 ng/L EE2 for 4 weeks during three different periods of gonadal development, including (i) spawning, (ii) early recrudescence and (iii) late recrudescence. These short-term exposures revealed that intersex incidence and severity were greater when RD were exposed while gonads were fully developed (during spawning) compared to periods of recrudescence. To assess if RD recover from intersex, wild fish were collected downstream WWTPs in the Grand River and assessed for intersex both before and after a 22-week recovery period in clean water that included gonadal regression and recrudescence. Results showed that fish did not recover from intersex, with intersex rates and severity similar to those both before and after the transition to clean water. This study further advances our knowledge on intersex manifestation in adult male fish including their sensitivity to endocrine active compounds during different periods of their annual reproductive cycle and their limited ability to recover from intersex after onset of the condition.
Collapse
Affiliation(s)
- Keegan A Hicks
- Alberta Environment and Protected Areas, 4938 89th Street, Edmonton, AB T6E5K1 Canada; Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada.
| | - Meghan L M Fuzzen
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| | - Hadi A Dhiyebi
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| | - Leslie M Bragg
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| | - Patricija Marjan
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada; Department of Biological Sciences, University of Calgary, 2500 University Dr NW, Calgary, AB T2N 1N4, Canada
| | - Jessie Cunningham
- Aquatic Contaminant Research Division, Water Science and Technology Branch, Environmentand Climate Change Canada, 867 Lakeshore Road, Burlington, ON L7S 1A1 Canada
| | - Mark E McMaster
- Aquatic Contaminant Research Division, Water Science and Technology Branch, Environmentand Climate Change Canada, 867 Lakeshore Road, Burlington, ON L7S 1A1 Canada
| | - Nivetha Srikanthan
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| | - Kirsten E Nikel
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| | - Maricor J Arlos
- Department of Civil and Environmental Engineering, University of Alberta, 9211-116 St. NW, Edmonton, AB T6G 1H9 Canada
| | - Mark R Servos
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| |
Collapse
|
3
|
Vassall M, Chakraborty S, Feng Y, Faheem M, Wang X, Bhandari RK. Transcriptional Alterations Induced by Delta-9 Tetrahydrocannabinol in the Brain and Gonads of Adult Medaka. J Xenobiot 2023; 13:237-251. [PMID: 37367494 DOI: 10.3390/jox13020018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/10/2023] [Accepted: 05/13/2023] [Indexed: 06/28/2023] Open
Abstract
With the legalization of marijuana smoking in several states of the United States and many other countries for medicinal and recreational use, the possibility of its release into the environment cannot be overruled. Currently, the environmental levels of marijuana metabolites are not monitored on a regular basis, and their stability in the environment is not well understood. Laboratory studies have linked delta 9-tetrahydrocannabinol (Δ9-THC) exposure with behavioral abnormalities in some fish species; however, their effects on endocrine organs are less understood. To understand the effects of THC on the brain and gonads, we exposed adult medaka (Oryzias latipes, Hd-rR strain, both male and female) to 50 ug/L THC for 21 days spanning their complete spermatogenic and oogenic cycles. We examined transcriptional responses of the brain and gonads (testis and ovary) to Δ9-THC, particularly molecular pathways associated with behavioral and reproductive functions. The Δ9-THC effects were more profound in males than females. The Δ9-THC-induced differential expression pattern of genes in the brain of the male fish suggested pathways to neurodegenerative diseases and pathways to reproductive impairment in the testis. The present results provide insights into endocrine disruption in aquatic organisms due to environmental cannabinoid compounds.
Collapse
Affiliation(s)
- Marlee Vassall
- Department of Biology, University of North Carolina, Greensboro, NC 27412, USA
| | - Sourav Chakraborty
- Department of Biology, University of North Carolina, Greensboro, NC 27412, USA
| | - Yashi Feng
- Department of Biology, University of North Carolina, Greensboro, NC 27412, USA
| | - Mehwish Faheem
- Department of Biology, University of North Carolina, Greensboro, NC 27412, USA
| | - Xuegeng Wang
- Department of Biology, University of North Carolina, Greensboro, NC 27412, USA
- Institute of Modern Aquaculture Science and Engineering, College of Life Sciences, South China Normal University, Guangzhou 510631, China
| | | |
Collapse
|
4
|
Horie Y, Nomura M, Ernesto UDL, Naija A, Akkajit P, Okamura H. Impact of acetyl tributyl citrate on gonadal sex differentiation and expression of biomarker genes for endocrine disruption in Japanese medaka. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 260:106553. [PMID: 37182273 DOI: 10.1016/j.aquatox.2023.106553] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/24/2023] [Accepted: 05/05/2023] [Indexed: 05/16/2023]
Abstract
Plasticizers are broadly classified as phthalate or nonphthalate. Recently, acetyl tributyl citrate (ATBC), an environmentally friendly nonphthalate plasticizer, was revealed to have the ability to disrupt thyroid hormone activity in fish species. Therefore, we aimed to assess whether ATBC exhibits any sex hormone (i.e., androgenic or estrogenic) activities. First, we examined the effects of ATBC on gonadal sex differentiation. Subsequently, we analyzed the different expression of biomarker genes that respond to endocrine-disrupting chemicals (EDCs) with sexual hormone activity in the liver. We observed normal testes and ovaries after both XX and XY medakas were exposed to ATBC, indicating that ATBC is not an EDCs with strong sex hormone activity and that it does not induce intersex (testis-to-ova or ovo-to-testis) or sex changes in Japanese medaka. The vitellogenin 1 (vtg1) and vitellogenin 2 (vtg2) mRNA expression levels in the liver of XX medakas were significantly reduced compared with those in the control group, whereas the expression levels of these genes in the liver of XY medakas remained unchanged. Finally, we examined the changes in the expression of biomarker genes that respond to EDCs with sex hormone activity in the gonads. The expression levels of biomarker genes did not differ significantly from that of the control group, although the expression levels of gsdf mRNA tended to increase while that of aromatase mRNA tended to decrease in the ovary of XX medakas following ATBC exposure. Conversely, the expression levels of gsdf and aromatase mRNAs in the testis of XY medakas remained unchanged. These results suggest that ATBC does not exhibit estrogenic activity, although it may have weak androgenic activity or no sexual hormone activity.
Collapse
Affiliation(s)
- Yoshifumi Horie
- Research Center for Inland Seas (KURCIS), Kobe University, Fukaeminami-machi, Higashinada-ku, Kobe 658-0022, Japan.
| | - Miho Nomura
- Graduate School of Maritime Science, Kobe University, Fukaeminami-machi, Higashinada-ku, Kobe 658-0022, Japan
| | | | - Azza Naija
- Biomedical Research Center, Qatar University, Doha, Qatar
| | - Pensiri Akkajit
- Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Phuket, Thailand
| | - Hideo Okamura
- Research Center for Inland Seas (KURCIS), Kobe University, Fukaeminami-machi, Higashinada-ku, Kobe 658-0022, Japan
| |
Collapse
|
5
|
van Gelderen TA, Ladisa C, Salazar-Moscoso M, Folgado C, Habibi HR, Ribas L. Metabolomic and transcriptomic profiles after immune stimulation in the zebrafish testes. Genomics 2023; 115:110581. [PMID: 36796654 DOI: 10.1016/j.ygeno.2023.110581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 02/09/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023]
Abstract
Fish farms are prone to disease outbreaks and stress due to high-density rearing conditions in tanks and sea cages, adversely affecting growth, reproduction, and metabolism. To understand the molecular mechanisms affected in the gonads of breeder fish after an immune challenge, we investigated the metabolome and the transcriptome profiles in zebrafish testes after inducing an immune response. After 48 h of the immune challenge, ultra-high-performance liquid chromatography (LC-MS) and transcriptomic analysis by RNA-seq (Illumina) resulted in 20 different released metabolites and 80 differentially expressed genes. Among these, glutamine and succinic acid were the most abundant metabolites released and 27,5% of the genes belong to either the immune or reproduction systems. Pathway analysis based on metabolomic and transcriptomic crosstalk identified cad and iars genes that act simultaneously with succinate metabolite. This study deciphers interactions between reproduction and immune systems and provides a basis to improve protocols in generating more resistant broodstock.
Collapse
Affiliation(s)
- T A van Gelderen
- Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas (ICM-CSIC), Department of Renewable Marine Resources, 08003 Barcelona, Spain
| | - C Ladisa
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - M Salazar-Moscoso
- Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas (ICM-CSIC), Department of Renewable Marine Resources, 08003 Barcelona, Spain
| | - C Folgado
- Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas (ICM-CSIC), Department of Renewable Marine Resources, 08003 Barcelona, Spain
| | - H R Habibi
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - L Ribas
- Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas (ICM-CSIC), Department of Renewable Marine Resources, 08003 Barcelona, Spain.
| |
Collapse
|
6
|
Roundup in the Reproduction of Crucian Carp ( Carassius carassius): An In Vitro Effect on the Pituitary Gland and Ovary. Animals (Basel) 2022; 13:ani13010105. [PMID: 36611714 PMCID: PMC9817507 DOI: 10.3390/ani13010105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022] Open
Abstract
Roundup, the most popular herbicide in global agriculture, is regarded as an endocrine disruptor causing alterations of important hormones at the hypothalamic-pituitary-gonadal axis as well as impairment of gametogenesis. The whole pituitary glands of crucian carp (Carassius carassius) were incubated for 3 h in the medium containing Roundup (0-control, 1 and 10 ng/mL). The level of luteinizing hormone (LH), and mRNA transcript abundance of kisspeptin (kiss-1) and its receptor (gpr54), were determined. The isolated ovarian fragments were incubated for 24 h in the presence of Roundup and the following effects on reproductive parameters were determined: the final oocyte maturation and ovulation, structural changes in follicles, secretion of 17,20β-progesterone (17,20β-P) as well as mRNA transcript abundance of the luteinizing hormone receptor (lhr), estrogen receptors (erα, erβ1, erβ2), and zona radiata (chorion) proteins (zp2 and zp3). Roundup inhibited final oocyte maturation and decreased the percentage of ovulated eggs, and furthermore, caused structural changes in the ovarian follicular components. There were no significant changes in the measured hormone levels and analyzed genes mRNA transcript abundance. Summing up, obtained results indicate that Roundup may adversely affect oocyte maturation and the quality of eggs, suggesting that exposure to this herbicide can lead to reproductive disorders in fish.
Collapse
|
7
|
Mustapha UF, Zhi F, Huang YQ, Assan D, Li GL, Jiang DN. First account of a transient intersex in spotted scat, Scatophagus argus: a marine gonochoristic fish. FISH PHYSIOLOGY AND BIOCHEMISTRY 2022; 48:1011-1023. [PMID: 35804212 DOI: 10.1007/s10695-022-01097-x] [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] [Received: 02/22/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
This study presents the first incidence of intersex associated with testis-ova in spotted scat (Scatophagus argus) reared in a controlled environment. The testis-ova is associated with the abnormal occurrence of primary oocytes (POs) in some male testis and is referred to as ectopic primary oocytes (Ecto-PO), whiles individuals with Ecto-PO are called "Ecto-PO gonad/individuals." We investigated gonads of 129 male spotted scat aged 4-12 and 18 months after hatch (mah) by histological studies for the presence of female sexual characteristics. A total of 20 out of 88 gonads representing 22.7% of male fish aged 6-12, or 15.5% of all male fish sampled, were found to have visible Ecto-PO. At least, the Ecto-PO had an average of 7 oocytes per gonadal section, indicating high severity. The Ecto-PO appears after sex differentiation and degenerates during sexual maturation. The Ecto-PO did not significantly influence the expression pattern of male and female sex-related genes performed using qPCR. Immunofluorescence of 42sp50 specifically stained the Ecto-PO without influence from the surrounding testicular tissues. In addition, temperature did not correlate with the proliferation of the Ecto-PO, but rather gonad developmental strategy. The results show that the naturally occurring Ecto-PO might not be detrimental to testis development and could be considered a frequent-high-level incidence of natural aberration. This study highlights the intricacy of fish sex differentiation and provides a new research chapter to ascertain the mystery behind the occurrence of Ecto-PO.
Collapse
Affiliation(s)
- Umar Farouk Mustapha
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Guangdong Province Famous Fish Reproduction and Breeding Engineering Technology Research Center, Zhanjiang, 524088, China
| | - Fei Zhi
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Guangdong Province Famous Fish Reproduction and Breeding Engineering Technology Research Center, Zhanjiang, 524088, China
| | - Yuang-Qing Huang
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Guangdong Province Famous Fish Reproduction and Breeding Engineering Technology Research Center, Zhanjiang, 524088, China
| | - Daniel Assan
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Guangdong Province Famous Fish Reproduction and Breeding Engineering Technology Research Center, Zhanjiang, 524088, China
| | - Guang-Li Li
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Guangdong Province Famous Fish Reproduction and Breeding Engineering Technology Research Center, Zhanjiang, 524088, China
| | - Dong-Neng Jiang
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Guangdong Province Famous Fish Reproduction and Breeding Engineering Technology Research Center, Zhanjiang, 524088, China.
| |
Collapse
|
8
|
Birk DS, Onose S, Kinoshita M, Murata K. Medaka, Oryzias latipes, egg envelopes are created by ovarian-expressed ZP proteins and liver-expressed choriogenins. ZOOLOGICAL LETTERS 2022; 8:11. [PMID: 35902919 PMCID: PMC9330664 DOI: 10.1186/s40851-022-00194-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 06/08/2022] [Indexed: 06/15/2023]
Abstract
The medaka (Oryzias latipes) egg envelope (chorion) is composed of three major glycoproteins, Zona Interna (ZI)-1, -2, and -3, that originate in the spawning female liver as the precursor proteins Choriogenin (Chg.)H, Chg.Hm, and Chg.L, respectively. These ZI and Chg. proteins contain a structural ZP protein domain that is conserved among the egg envelope proteins of all animals. While ovarian expression of ZP proteins (e.g., ZPCs and ZPB) has been reported in medakas, the functions of these proteins remain unknown. Thus, the present study aimed to determine whether the ovary-expressed medaka ZP protein, mZPC5, is involved in forming the chorion matrix.The mZPC5 gene (mzpc5) was expressed in the ovaries but not the livers of mature female medakas, as shown by reverse transcription-polymerase chain reaction assays with mzpc5-specific primers. In situ hybridization analysis revealed that ovarian mzpc5 expression was restricted to the ooplasm of early (stage I-III) previtellogenic oocytes, and its expression signal weakened with oocyte growth. Following sodium-dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and Western blotting analysis with anti-mZPC5 antibodies, two immunoreactive proteins were detected in the ovary and chorion extracts. These proteins were approximately 50 and 74 kDa in size, like ZI-3 and ZI-2, respectively.Immunohistochemical assays using anti-mZPC5 and anti-Chg.H antibodies localized the mZPC5 protein in the ooplasm of early previtellogenic oocytes. With oocyte growth, mZPC5 tended to accumulate in the chorion, co-localizing with Chg.H.We previously showed that ovary-expressed ZP proteins could not compensate for Chg.L function loss in gene knock-out (chg.l -/-) medakas. As in our previous study, the chg.l-/- females produced oocytes with thin chorions, resulting in infertile soft eggs. However, in the present study, mZPC5 and Chg.H were co-localized in the chg.l-/- chorions. These results suggested that in the medaka previtellogenic oocyte, 1) mZPC5 is secreted from the ooplasm and deposited on the outer surface of its plasma membrane, creating the thin chorion layer; and 2) following the accumulation of liver-derived Chgs., the 3D structure of the chorion matrix is formed cooperatively with mZPC5 and Chgs. during oogenesis. More research is needed to confirm the functions of mZPC5 in chorion structure and physiology.
Collapse
Affiliation(s)
- Devun S. Birk
- University of California, Davis. Center for Health and the Environment, Davis, CA 95616 USA
| | - Shinji Onose
- University of California, Davis. Center for Health and the Environment, Davis, CA 95616 USA
- Fordays Co., Ltd, Tokyo, 103-0016 Japan
| | - Masato Kinoshita
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502 Japan
| | - Kenji Murata
- University of California, Davis. Center for Health and the Environment, Davis, CA 95616 USA
| |
Collapse
|
9
|
Schönemann AM, Beiras R, Diz AP. Widespread alterations upon exposure to the estrogenic endocrine disruptor ethinyl estradiol in the liver proteome of the marine male fish Cyprinodon variegatus. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 248:106189. [PMID: 35537357 DOI: 10.1016/j.aquatox.2022.106189] [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: 09/02/2021] [Revised: 04/18/2022] [Accepted: 05/02/2022] [Indexed: 06/14/2023]
Abstract
Quantitative proteomic changes in the liver of adult males of Sheepshead minnow (Cyprinodon variegatus) upon exposure to ethinyl estradiol (EE2) were assessed to provide an advanced understanding of the metabolic pathways affected by estrogenic endocrine disruption in marine fish, and to identify potential novel molecular biomarkers for the environmental exposure to estrogens. From a total of 3188 identified protein groups (hereafter proteins), 463 showed a statistically significant difference in their abundance between EE2 treatment and solvent control samples. The most affected biological processes upon EE2 exposure were related to ribosomal biogenesis, protein synthesis and transport of nascent proteins to endoplasmic reticulum, and nuclear mRNA catabolism. Within the group of upregulated proteins, a subset of 14 proteins, involved in egg production (Vitellogenin, Zona Pellucida), peptidase activity (Cathepsine E, peptidase S1, Serine/threonine-protein kinase PRP4 homolog, Isoaspartyl peptidase and Whey acidic protein), and nucleic acid binding (Poly [ADP-ribose] polymerase 14) were significantly upregulated with fold-change values higher than 3. In contrast, Collagen alpha-2, involved in the process of response to steroid hormones, among others, was significantly downregulated (fold change = 0.2). This pattern of alterations in the liver proteome of adult males of C. variegatus can be used to identify promising novel biomarkers for the characterization of exposure of marine fish to estrogens. The Whey acidic protein-like showed the highest upregulation in EE2-exposed individuals (21-fold over controls), suggesting the utility of abundance levels of this protein in male liver as a novel biomarker of xenoestrogen exposure.
Collapse
Affiliation(s)
- Alexandre M Schönemann
- Centro de Investigación Mariña da Universidade de Vigo (CIM-UVigo), Vigo, Galicia, Spain; Department of Biochemistry, Genetics and Immunology, University of Vigo, Vigo, Spain
| | - Ricardo Beiras
- Centro de Investigación Mariña da Universidade de Vigo (CIM-UVigo), Vigo, Galicia, Spain; Department of Ecology and Animal Biology, University of Vigo, Vigo, Galicia, Spain
| | - Angel P Diz
- Centro de Investigación Mariña da Universidade de Vigo (CIM-UVigo), Vigo, Galicia, Spain; Department of Biochemistry, Genetics and Immunology, University of Vigo, Vigo, Spain.
| |
Collapse
|
10
|
Roy B, Basak R, Rai U. Impact of xenoestrogens on sex differentiation and reproduction in teleosts. AQUACULTURE AND FISHERIES 2022. [DOI: 10.1016/j.aaf.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
11
|
Wang J, Li X, Gao M, Li X, Zhao L, Ru S. Polystyrene microplastics increase estrogenic effects of 17α-ethynylestradiol on male marine medaka (Oryzias melastigma). CHEMOSPHERE 2022; 287:132312. [PMID: 34563785 DOI: 10.1016/j.chemosphere.2021.132312] [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] [Received: 05/14/2021] [Revised: 09/06/2021] [Accepted: 09/18/2021] [Indexed: 06/13/2023]
Abstract
Microplastics (MPs) and endocrine disrupting chemicals are ubiquitous pollutants in marine environments, but their combined ecological risk is unclear. This study exposed male marine medaka (Oryzias melastigma) to 10 ng/L 17α-ethynylestradiol (EE2) alone or EE2 plus 2, 20, and 200 μg/L polystyrene MPs for 28 days to investigate the impacts of MPs on the reproductive disruption of EE2. The results showed that 10 ng/L EE2 alone did not affect biometric parameters, while co-exposure to EE2 and 20, 200 μg/L MPs suppressed the growth and decreased gonadosomatic and hepatosomatic indices. Compared to EE2 alone, EE2 plus MPs exposure significantly increased plasma 17β-estradiol (E2) levels in a dose-dependent manner, and co-exposure to EE2 and 20, 200 μg/L MPs significantly increased the ratios of E2/testosterone (T). Moreover, EE2 plus MPs exposure elevated the transcription levels of estrogen biomarker genes vitellogenin and choriogenin, and estrogen receptor (ERα and ERβ). Morphological analysis also showed that co-exposure to EE2 and MPs induced more severe damage to the testes and livers, indicating that MPs increased the toxicity of EE2. The actual EE2 concentrations in the solution increased with the exposure concentrations of MPs, suggesting that MPs changed the fate and behavior of EE2 in the seawater. These findings demonstrate that MPs could increase the estrogenic effects of EE2 on marine fish, suggesting that the combined health risk of MPs and endocrine disrupting chemicals on marine organisms should be paid great attention.
Collapse
Affiliation(s)
- Jun Wang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Xuan Li
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Ming Gao
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, Jiangsu, China
| | - Xuefu Li
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Lingchao Zhao
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Shaoguo Ru
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China.
| |
Collapse
|
12
|
Mushirobira Y, Kamegai K, Amagai T, Murata R, Nagae M, Soyano K. Expression profiles of hepatic vitellogenin and gonadal zona pellucida subtypes in gray mullet (Mugil cephalus) with 17α-ethinylestradiol-induced gonadal abnormality. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 237:105863. [PMID: 34082271 DOI: 10.1016/j.aquatox.2021.105863] [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: 02/12/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
The subtypes of zona pellucida (zp), primarily expressed in female gonads, are considered novel molecular markers for testis-ova (or intersex), a type of gonadal abnormality caused by environmental estrogens (EEs) in Japanese medaka (Oryzias latipes). However, the association between testis-ova and the expression of gonadal zp subtypes is unclear in other teleost species, particularly in species studied in field surveys. In this study, 17α-ethinylestradiol (EE2) was orally administrated at 4-4000 ng/g body weight (BW)/day for 28 days to gray mullets (Mugil cephalus), and gonadal abnormalities were studied using histological analysis. The expression profiles of gonadal zp subtypes (zpb and zpc5) were analyzed to evaluate their suitability as gonadal abnormality markers by comparing with a hepatic vitellogenin (vtg) subtype (vtgAb). The oral administration of EE2 40 and 400 ng/g BW/day for 28 days induced significant gonadal zpb expression, and the gonads showed moderate abnormality (testis-ova). Conversely, the gonadal zpc5 levels decreased significantly in response to the oral administration of EE2 at 4000 ng/g BW/day for 28 days, and the gonads exhibited severe abnormalities. The hepatic vtgAb levels increased upon EE2 treatment regardless of gonadal abnormality. Therefore, the gonadal zpb levels and hepatic vtgAb levels served as appropriate markers for testis-ova and EE2 presence, respectively. However, the diagnosis of severe gonadal abnormality using gonadal zpc5 was moderately accurate. The findings suggest that the combination of vtgAb, zpb, and zpc5 is a potential marker for gonadal abnormality caused by EE contamination in gray mullet. That said, the potential of zpc5 should be reconsidered to determine if it shows greater accuracy in a larger or more diverse population.
Collapse
Affiliation(s)
- Yuji Mushirobira
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan.
| | - Kohei Kamegai
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan; Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki 852-8521, Nagasaki, Japan
| | - Takafumi Amagai
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan; Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki 852-8521, Nagasaki, Japan
| | - Ryosuke Murata
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan
| | - Masaki Nagae
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki 852-8521, Nagasaki, Japan
| | - Kiyoshi Soyano
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan.
| |
Collapse
|
13
|
Mohammadzadeh M, Pourentezari M, Zare-Zardini H, Nabi A, Esmailabad SG, Khodadadian A, Talebi AR. The effects of sesame oil and different doses of estradiol on testicular structure, sperm parameters, and chromatin integrity in old mice. Clin Exp Reprod Med 2021; 48:34-42. [PMID: 33648043 PMCID: PMC7943348 DOI: 10.5653/cerm.2020.03524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/25/2020] [Indexed: 01/04/2023] Open
Abstract
Objective Studies of the effects of estrogens on the male reproductive system have emphasized the role of these hormones in male fertility. Sesame oil has many phytoestrogenic compounds and may improve male fertility. This study investigated the effects of sesame oil and different concentrations of estrogen on sperm parameters and DNA integrity in male mice. Methods Twenty old NMRI (The Naval Medical Research Institute) male mice (40 weeks; weight, 30–35 g) were treated with sesame oil or different concentrations of estrogen (estradiol, 1 and 10 μL/kg/day) or received no treatment (controls). After 35 days, sperm parameters and DNA integrity were assessed and analyzed. Results Sperm count, progressive motility, and morphology were decreased in the group that received 10 μL/kg of estradiol. A remarkably lower percentage of DNA fragmentation and protamine deficiency were detected in the group that received 1 μL/kg of estradiol. In the groups that received sesame oil and 1 μL/kg of estradiol, the numbers of spermatogonia and Leydig cells were higher than in controls. The combination of sesame oil and 1 μL/kg of estradiol led to improved sperm parameters and chromatin and testicular structure. Conclusion Based on this study, consumption of sesame oil and a low concentration of estradiol may improve testicular function in older mice.
Collapse
Affiliation(s)
- Masoomeh Mohammadzadeh
- Department of Reproductive Biology, Yazd Reproductive Sciences Institute, Research and Clinical Center for Infertility, Yazd, Iran
| | - Majid Pourentezari
- Department of Biology and Anatomical Sciences, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Hadi Zare-Zardini
- Department of Hematology and Oncology Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.,Department of Sciences, Farhangian University, Isfahan, Iran.,Medical Nanotechnology and Tissue Engineering Research Center, Yazd Reproductive Sciences Institute, Yazd, Iran
| | - Ali Nabi
- Department of Reproductive Biology, Yazd Reproductive Sciences Institute, Research and Clinical Center for Infertility, Yazd, Iran
| | - Saeed Ghasemi Esmailabad
- Department of Reproductive Biology, Yazd Reproductive Sciences Institute, Research and Clinical Center for Infertility, Yazd, Iran
| | - Ali Khodadadian
- Department of Medical Genetics, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Ali Reza Talebi
- Department of Reproductive Biology, Yazd Reproductive Sciences Institute, Research and Clinical Center for Infertility, Yazd, Iran
| |
Collapse
|
14
|
Li Y, Li J, Shen Y, Xiong Y, Li X, Qin Z. Identification of estrogen receptor target genes involved in gonadal feminization caused by estrogen in Xenopus laevis. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 232:105760. [PMID: 33515924 DOI: 10.1016/j.aquatox.2021.105760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/10/2021] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
Estrogens and estrogenic endocrine disrupting chemicals can cause gonadal feminization in some vertebrates mainly through estrogen receptor (ER), but the underlying molecular mechanisms are unclear. The present study aimed to identify ER target genes involved in estrogen-caused gonadal feminization in Xenopus laevis. Based on our recent transcriptomic data that 10 nM 17β-estradiol (E2) altered gene transcription in feminizing gonads of male X. laevis at NF stages 48, 50, and 52, we searched estrogen response element (ERE) using the Dragon ERE Finder software in the promoter region of all the E2-regulated genes. As a result, 163 genes containing ERE sequence were identified as predicted ER target genes at NF stage 50 (on the 14th day postfertilization), a crucial stage for gonadal feminization. Then, some of these predicted ER target genes were further investigated, mainly including the genes that were suggested to be involved in E2-caused gonadal feminization and genes being dramatically up or down-regulated by E2. Fifteen genes were demonstrated to be responsive to E2, in turn ER antagonist blocked the E2-regulated transcription. Finally, we identified 10 genes that can bind to ERα by a chromatin immunoprecipitation-qPCR. Taken together, we identified the 10 genes that contain predicted ERE sequences, are responsive to estrogen and ER antagonist, and have ability to bind to ER as ER target genes, including pglyrp2, apoa1, fgb, tdo2, ca6, nags, cpb2, tmprss6, nudc, zwilch. Our results could help to improve the understanding of the molecular mechanisms for gonadal feminization caused by estrogenic endocrine disrupting chemicals in X. laevis, and even in other species.
Collapse
Affiliation(s)
- Yuanyuan Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jinbo Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanping Shen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yiming Xiong
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xinghong Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhanfen Qin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| |
Collapse
|
15
|
Cooper R, David A, Lange A, Tyler CR. Health Effects and Life Stage Sensitivities in Zebrafish Exposed to an Estrogenic Wastewater Treatment Works Effluent. Front Endocrinol (Lausanne) 2021; 12:666656. [PMID: 33995285 PMCID: PMC8120895 DOI: 10.3389/fendo.2021.666656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 03/24/2021] [Indexed: 11/27/2022] Open
Abstract
A wide range of health effects in fish have been reported for exposure to wastewater treatment work (WwTW) effluents including feminized responses in males. Most of these exposure studies, however, have assessed acute health effects and chronic exposure effects are less well established. Using an Estrogen Responsive Element-Green Fluorescent Protein (ERE-GFP)-Casper transgenic zebrafish, we investigated chronic health effects and life stage sensitivities for exposure to an estrogenic WwTW effluent and the synthetic estrogen 17α-ethinylestradiol (EE2). Exposure to the WwTW effluent (at full strength;100%) and to 10 ng/L (nominal) EE2 delayed testis maturation in male fish but accelerated ovary development in females. Exposure to 50% and 100% effluent, and to 10 ng/L EE2, also resulted in skewed sex ratios in favor of females. Differing patterns of green fluorescent protein (GFP) expression, in terms of target tissues and developmental life stages occurred in the ERE-GFP- zebrafish chronically exposed to 100% effluent and reflected the estrogenic content of the effluent. gfp and vitellogenin (vtg) mRNA induction were positively correlated with measured levels of steroidal estrogens in the effluent throughout the study. Our findings illustrate the importance of a fish's developmental stage for estrogen exposure effects and demonstrate the utility of the ERE-GFP zebrafish for integrative health analysis for exposure to estrogenic chemical mixtures.
Collapse
Affiliation(s)
- Ruth Cooper
- College of Life & Environmental Sciences, University of Exeter, Biosciences, Exeter, United Kingdom
| | - Arthur David
- School of Life Sciences, University of Sussex, Brighton, United Kingdom
| | - Anke Lange
- College of Life & Environmental Sciences, University of Exeter, Biosciences, Exeter, United Kingdom
| | - Charles R. Tyler
- College of Life & Environmental Sciences, University of Exeter, Biosciences, Exeter, United Kingdom
- *Correspondence: Charles R. Tyler,
| |
Collapse
|
16
|
Amereh F, Babaei M, Eslami A, Fazelipour S, Rafiee M. The emerging risk of exposure to nano(micro)plastics on endocrine disturbance and reproductive toxicity: From a hypothetical scenario to a global public health challenge. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114158. [PMID: 32088433 DOI: 10.1016/j.envpol.2020.114158] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 01/19/2020] [Accepted: 02/09/2020] [Indexed: 05/23/2023]
Abstract
Humans are potentially exposed to nano(micro)plastics, however their interaction with tissues and cells in humans remains largely unknown. This premise is particularly notable with nano-sized plastic particulates, a potentially most pernicious form of plastic pollution. In this study, even in a hypothetical scenario in terms of dose (1, 3, 6 and 10 mg/kg-day) and exposure time (five weeks), the potential endocrine disturbances with particular reference to reproductive toxicity of polystyrene nanoplastics (PS NPs, average size = 38.92 nm) was studied in male rats considering biomarkers of semen quality, changes in hormonal milieu and molecular signatures of endocrine disruption. Sperm DNA integrity and its chromatin structure were also analyzed. There observed significant inverse associations between exposure to PS NPs and serum concentrations of testosterone, luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Tissue and cell impairments were also noticed even at the lowest tested dosage, though the severity of lesions followed a clear dose-response pattern. DNA damage as well as alterations in sperm morphology and viability were evident, again proportionally with the amount of exposure dosage. RT-qPCR data were in accordance with the results of physio-histological alterations and fluorescence imaging, as significant down-regulation of PLZF, DAZL, FSH and LH gene expressions were noticed in the testis of exposed animals, suggesting that exposure interferes with spermatogenesis and also with HPT-axis. However, among those with highest exposure dosage, expressions of FSH and LH were significantly increased. ABP modulation further revealed evidence of a nonlinear dose response. The association between PS NPs exposure and GnRH was indeed in an unexpected positive direction, though these end-points were less sensitive at higher doses. Although additional evidence is warranted, the present work provides new insights into the possible risks of plastic nanoparticles exposure in humans, especially since the problem is growing and will persist for a long time.
Collapse
Affiliation(s)
- Fatemeh Amereh
- Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Babaei
- Department of Clinical Sciences, Faculty of Veterinary Sciences, Bu-Ali Sina University Hamedan, Iran
| | - Akbar Eslami
- Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Simin Fazelipour
- Department of Anatomy, Faculty of Tehran Medical Science Islamic Azad University, Tehran, Iran
| | - Mohammad Rafiee
- Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
17
|
Liang M, Yan S, Chen R, Hong X, Zha J. 3-(4-Methylbenzylidene) camphor induced reproduction toxicity and antiandrogenicity in Japanese medaka (Oryzias latipes). CHEMOSPHERE 2020; 249:126224. [PMID: 32088463 DOI: 10.1016/j.chemosphere.2020.126224] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 02/11/2020] [Accepted: 02/13/2020] [Indexed: 06/10/2023]
Abstract
To assess the toxic effects of 3-(4-Methylbenzylidene) camphor (4-MBC) at environmentally relevant concentrations on the reproduction and development of Japanese medaka (Oryzias latipes), adult paired medaka (F0) were exposed to 5, 50, and 500 μg/L 4-MBC for 28 d in the current study. The fecundity and fertility were significantly decreased at 500 μg/L 4-MBC (p < 0.05). Histological observations showed that spermatogenesis in F0 males was significantly inhibited at 50 and 500 μg/L 4-MBC, similar to the effects obtained with all treatments of plasma 11-ketotestosterone (p < 0.05). Moreover, the plasma vitellogenin and estradiol levels in F0 females were significantly increased at 5 μg/L 4-MBC (p < 0.05). All the transcripts of hypothalamic-pituitary-gonadal (HPG) axis-related genes tested in the brains and gonads of males were significantly increased at all treatments, similar to the effects obtained for erα, erβ and vtg in the livers and in contrast to those found for arα in the livers (p < 0.05). Equal numbers of embryos were exposed to tap water and 4-MBC solutions. Significantly increased times to hatching, decreased hatching rates and decreased body lengths at 14-day post-hatching (dph) were obtained at 500 μg/L 4-MBC treatment (p < 0.05). The cumulative death rates at 14 dph were significantly increased with all the treatments (p < 0.05). Therefore, our results showed that long-term exposure to 50 and 500 μg/L 4-MBC causes reproductive and developmental toxicity and thus provide new insight into antiandrogenicity and the mechanism of 4-MBC in Japanese medaka.
Collapse
Affiliation(s)
- Mengmeng Liang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100085, China
| | - Saihong Yan
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100085, China
| | - Rui Chen
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100085, China
| | - Xiangsheng Hong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100085, China
| | - Jinmiao Zha
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| |
Collapse
|
18
|
Martyniuk CJ, Feswick A, Munkittrick KR, Dreier DA, Denslow ND. Twenty years of transcriptomics, 17alpha-ethinylestradiol, and fish. Gen Comp Endocrinol 2020; 286:113325. [PMID: 31733209 PMCID: PMC6961817 DOI: 10.1016/j.ygcen.2019.113325] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/14/2019] [Accepted: 11/12/2019] [Indexed: 02/06/2023]
Abstract
In aquatic toxicology, perhaps no pharmaceutical has been investigated more intensely than 17alpha-ethinylestradiol (EE2), the active ingredient of the birth control pill. At the turn of the century, the fields of comparative endocrinology and endocrine disruption research witnessed the emergence of omics technologies, which were rapidly adapted to characterize potential hazards associated with exposures to environmental estrogens, such as EE2. Since then, significant advances have been made by the scientific community, and as a result, much has been learned about estrogen receptor signaling in fish from environmental xenoestrogens. Vitellogenin, the egg yolk precursor protein, was identified as a major estrogen-responsive gene, establishing itself as the premier biomarker for estrogenic exposures. Omics studies have identified a plethora of estrogen responsive genes, contributing to a wealth of knowledge on estrogen-mediated regulatory networks in teleosts. There have been ~40 studies that report on transcriptome responses to EE2 in a variety of fish species (e.g., zebrafish, fathead minnows, rainbow trout, pipefish, mummichog, stickleback, cod, and others). Data on the liver and testis transcriptomes dominate in the literature and have been the subject of many EE2 studies, yet there remain knowledge gaps for other tissues, such as the spleen, kidney, and pituitary. Inter-laboratory genomics studies have revealed transcriptional networks altered by EE2 treatment in the liver; networks related to amino acid activation and protein folding are increased by EE2 while those related to xenobiotic metabolism, immune system, circulation, and triglyceride storage are suppressed. EE2-responsive networks in other tissues are not as comprehensively defined which is a knowledge gap as regulated networks are expected to be tissue-specific. On the horizon, omics studies for estrogen-mediated effects in fish include: (1) Establishing conceptual frameworks for incorporating estrogen-responsive networks into environmental monitoring programs; (2) Leveraging in vitro and computational toxicology approaches to identify chemicals associated with estrogen receptor-mediated effects in fish (e.g., male vitellogenin production); (3) Discovering new tissue-specific estrogen receptor signaling pathways in fish; and (4) Developing quantitative adverse outcome pathway predictive models for estrogen signaling. As we look ahead, research into EE2 over the past several decades can serve as a template for the array of hormones and endocrine active substances yet to be fully characterized or discovered.
Collapse
Affiliation(s)
- Christopher J Martyniuk
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada; Center for Environmental & Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA; University of Florida Genetics Institute, USA; Canadian Rivers Institute, Canada.
| | - April Feswick
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada; Canadian Rivers Institute, Canada
| | - Kelly R Munkittrick
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada; Department of Biology, Wilfrid Laurier University, Waterloo, ON, Canada; Canadian Rivers Institute, Canada
| | - David A Dreier
- Center for Environmental & Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA; Syngenta Crop Protection, LLC, Greensboro, NC, USA
| | - Nancy D Denslow
- Center for Environmental & Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA; University of Florida Genetics Institute, USA
| |
Collapse
|
19
|
Celino-Brady FT, Lerner DT, Seale AP. Experimental Approaches for Characterizing the Endocrine-Disrupting Effects of Environmental Chemicals in Fish. Front Endocrinol (Lausanne) 2020; 11:619361. [PMID: 33716955 PMCID: PMC7947849 DOI: 10.3389/fendo.2020.619361] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/30/2020] [Indexed: 12/22/2022] Open
Abstract
Increasing industrial and agricultural activities have led to a disturbing increase of pollutant discharges into the environment. Most of these pollutants can induce short-term, sustained or delayed impacts on developmental, physiological, and behavioral processes that are often regulated by the endocrine system in vertebrates, including fish, thus they are termed endocrine-disrupting chemicals (EDCs). Physiological impacts resulting from the exposure of these vertebrates to EDCs include abnormalities in growth and reproductive development, as many of the prevalent chemicals are capable of binding the receptors to sex steroid hormones. The approaches employed to investigate the action and impact of EDCs is largely dependent on the specific life history and habitat of each species, and the type of chemical that organisms are exposed to. Aquatic vertebrates, such as fish, are among the first organisms to be affected by waterborne EDCs, an attribute that has justified their wide-spread use as sentinel species. Many fish species are exposed to these chemicals in the wild, for either short or prolonged periods as larvae, adults, or both, thus, studies are typically designed to focus on either acute or chronic exposure at distinct developmental stages. The aim of this review is to provide an overview of the approaches and experimental methods commonly used to characterize the effects of some of the environmentally prevalent and emerging EDCs, including 17 α-ethinylestradiol, nonylphenol, BPA, phthalates, and arsenic; and the pervasive and potential carriers of EDCs, microplastics, on reproduction and growth. In vivo and in vitro studies are designed and employed to elucidate the direct effects of EDCs at the organismal and cellular levels, respectively. In silico approaches, on the other hand, comprise computational methods that have been more recently applied with the potential to replace extensive in vitro screening of EDCs. These approaches are discussed in light of model species, age and duration of EDC exposure.
Collapse
Affiliation(s)
- Fritzie T. Celino-Brady
- Department of Human Nutrition, Food and Animal Sciences, University of Hawai’i at Mānoa, Honolulu, HI, United States
| | - Darren T. Lerner
- University of Hawai’i Sea Grant College Program, University of Hawai’i at Mānoa, Honolulu, HI, United States
| | - Andre P. Seale
- Department of Human Nutrition, Food and Animal Sciences, University of Hawai’i at Mānoa, Honolulu, HI, United States
- *Correspondence: Andre P. Seale,
| |
Collapse
|
20
|
Voisin AS, Kültz D, Silvestre F. Early-life exposure to the endocrine disruptor 17-α-ethinylestradiol induces delayed effects in adult brain, liver and ovotestis proteomes of a self-fertilizing fish. J Proteomics 2018; 194:112-124. [PMID: 30550985 DOI: 10.1016/j.jprot.2018.12.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 11/23/2018] [Accepted: 12/07/2018] [Indexed: 01/29/2023]
Abstract
Early-life represents a critically sensitive window to endocrine disrupting chemicals, potentially leading to long-term repercussions on the phenotype later in life. The mechanisms underlying this phenomenon, referred to as the Developmental Origins of Health and Disease (DOHaD), are still poorly understood. To gain molecular understanding of these effects, we exposed mangrove rivulus (Kryptolebias marmoratus) for 28 days post hatching (dph) to 4 and 120 ng/L 17-α-ethinylestradiol, a model xenoestrogen. After 28 days, fish were raised for 140 days in clean water and we performed quantitative label-free proteomics on brain, liver and ovotestis of 168 dph adults. A total of 820, 888 and 420 proteins were robustly identified in the brain, liver and ovotestis, respectively. Effects of 17-α-ethinylestradiol were tissue and dose-dependent: a total of 31, 51 and 18 proteins were differentially abundant at 4 ng/L in the brain, liver and ovotestis, respectively, compared to 20, 25 and 39 proteins at 120 ng/L. Our results suggest that estrogen-responsive pathways, such as lipid metabolism, inflammation, and the innate immune system were affected months after the exposure. In addition, the potential perturbation of S-adenosylmethionine metabolism encourages future studies to investigate the role of DNA methylation in mediating the long-term effects of early-life exposures. SIGNIFICANCE: The Developmental Origins of Health and Disease (DOHaD) states that early life stages of humans and animals are sensitive to environmental stressors and can develop health issues later in life, even if the stress has ceased. Molecular mechanisms supporting DOHaD are still unclear. The mangrove rivulus is a new fish model species naturally reproducing by self-fertilization, making it possible to use isogenic lineages in which all individuals are highly homozygous. This species therefore permits to strongly reduce the confounding factor of genetic variability in order to investigate the effects of environmental stress on the phenotype. After characterizing the molecular phenotype of brain, liver and ovotestis, we obtained true proteomic reaction norms of these three organs in adults after early life stages have been exposed to the common endocrine disruptor 17-α-ethinylestradiol (EE2). Our study demonstrates long-term effects of early-life endocrine disruption at the proteomic level in diverse estrogen-responsive pathways 5 months after the exposure. The lowest tested and environmentally relevant concentration of 4 ng/L had the highest impact on the proteome in brain and liver, highlighting the potency of endocrine disruptors at low concentrations.
Collapse
Affiliation(s)
- Anne-Sophie Voisin
- Laboratory of Evolutionary and Adaptive Physiology - Institute of Life, Earth and Environment - University of Namur, 61 Rue de Bruxelles, B5000 Namur, Belgium.
| | - Dietmar Kültz
- Department of Animal Sciences, University of California, Davis, Davis, CA 95616, USA
| | - Frédéric Silvestre
- Laboratory of Evolutionary and Adaptive Physiology - Institute of Life, Earth and Environment - University of Namur, 61 Rue de Bruxelles, B5000 Namur, Belgium
| |
Collapse
|
21
|
Kim HS, Lee BY, Han J, Jeong CB, Hwang DS, Lee MC, Kang HM, Kim DH, Lee D, Kim J, Choi IY, Lee JS. The genome of the marine medaka Oryzias melastigma. Mol Ecol Resour 2018; 18:656-665. [PMID: 29451363 DOI: 10.1111/1755-0998.12769] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 01/29/2018] [Accepted: 02/06/2018] [Indexed: 11/30/2022]
Abstract
Marine medaka (Oryzias melastigma) is considered to be a useful fish model for marine and estuarine ecotoxicology studies and has good potential for field-based population genomics because of its geographical distribution in Asian estuarine and coastal areas. In this study, we present the first whole-genome draft of O. melastigma. The genome assembly consists of 8,602 scaffolds (N50 = 23.737 Mb) and a total genome length of 779.4 Mb. A total of 23,528 genes were predicted, and 12,670 gene families shared with three teleost species (Japanese medaka, mangrove killifish and zebrafish) were identified. Genome analyses revealed that the O. melastigma genome is highly heterozygous and contains a large number of repeat sequences. This assembly represents a useful genomic resource for fish scientists.
Collapse
Affiliation(s)
- Hui-Su Kim
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Bo-Young Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Jeonghoon Han
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Chang-Bum Jeong
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Dae-Sik Hwang
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Min-Chul Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Hye-Min Kang
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Duck-Hyun Kim
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Daehwan Lee
- Department of Biomedical Science and Engineering, Konkuk University, Seoul, South Korea
| | - Jaebum Kim
- Department of Biomedical Science and Engineering, Konkuk University, Seoul, South Korea
| | - Ik-Young Choi
- Department of Agriculture and Life Industry, Kangwon National University, Chuncheon, South Korea
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| |
Collapse
|
22
|
Kobayashi T, Chiba A, Sato T, Myosho T, Yamamoto J, Okamura T, Onishi Y, Sakaizumi M, Hamaguchi S, Iguchi T, Horie Y. Estrogen alters gonadal soma-derived factor (Gsdf)/Foxl2 expression levels in the testes associated with testis-ova differentiation in adult medaka, Oryzias latipes. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 191:209-218. [PMID: 28866280 DOI: 10.1016/j.aquatox.2017.08.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/11/2017] [Accepted: 08/16/2017] [Indexed: 06/07/2023]
Abstract
Testis-ova differentiation in sexually mature male medaka (Oryzias latipes) is easily induced by estrogenic chemicals, indicating that spermatogonia persist in sexual bipotentiality, even in mature testes in medaka. By contrast, the effects of estrogen on testicular somatic cells associated with testis-ova differentiation in medaka remain unclear. In this study, we focused on the dynamics of sex-related genes (Gsdf, Dmrt1, and Foxl2) expressed in Sertoli cells in the mature testes of adult medaka during estrogen-induced testis-ova differentiation. When mature male medaka were exposed to estradiol benzoate (EB; 800ng/L), testis-ova first appeared after EB treatment for 14days (observed as the first oocytes of the leptotene-zygotene stage). However, the testis remained structurally unchanged, even after EB treatment for 28days. Although Foxl2 is a female-specific sex gene, EB treatment for 7days induced Foxl2/FOXL2 expression in all Sertoli cell-enclosed spermatogonia before testis-ova first appeared; however, Foxl2 was not detected in somatic cells in control testes. Conversely, Sertoli-cell-specific Gsdf mRNA expression levels significantly decreased after EB treatment for 14days, and no changes were observed in DMRT1 localization following EB treatment, whereas Dmrt1 mRNA levels increased significantly. Furthermore, after EB exposure, FOXl2 and DMRT1 were co-localized in Sertoli cells during testis-ova differentiation, although FOXL2 localization was undetectable in Sertoli-cell-enclosed apoptotic testis-ova, whereas DMRT1 remained localized in Sertoli cells. These results indicated for the first time that based on the expression of female-specific sex genes, feminization of Sertoli cells precedes testis-ova differentiation induced by estrogen in mature testes in medaka; however, complete feminization of Sertoli cells was not induced in this study. Additionally, it is suggested strongly that Foxl2 and Gsdf expression constitute potential molecular markers for evaluating the effects of estrogenic chemicals on testicular somatic cells associated with estrogen-induced testis-ova differentiation in mature male medaka.
Collapse
Affiliation(s)
- Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan.
| | - Ayaka Chiba
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan.
| | - Tadashi Sato
- Institute for Science and Technology, Niigata University, Niigata, Niigata 950-2181, Japan.
| | - Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan.
| | - Jun Yamamoto
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan.
| | - Tetsuro Okamura
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan.
| | - Yuta Onishi
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan.
| | - Mitsuru Sakaizumi
- Institute for Science and Technology, Niigata University, Niigata, Niigata 950-2181, Japan.
| | - Satoshi Hamaguchi
- Institute for Science and Technology, Niigata University, Niigata, Niigata 950-2181, Japan.
| | - Taisen Iguchi
- Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institute of Natural Sciences, Okazaki, Aichi 444-8787, Japan.
| | - Yoshifumi Horie
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan; National Institute for Environmental Studies, Tsukuba, 305-8506, Japan.
| |
Collapse
|
23
|
Marjan P, Martyniuk CJ, Fuzzen MLM, MacLatchy DL, McMaster ME, Servos MR. Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater-treatment plant upgrades. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:2108-2122. [PMID: 28106290 DOI: 10.1002/etc.3741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/05/2016] [Accepted: 01/17/2017] [Indexed: 06/06/2023]
Abstract
The present study measured hepatic transcriptome responses in male rainbow darter (Etheostoma caeruleum) exposed to 2 municipal wastewater-treatment plants (MWWTPs; Kitchener and Waterloo) over 4 fall seasons (2011-2014) in the Grand River (Ontario, Canada). The overall goal was to determine if upgrades at the Kitchener MWWTP (in 2012) resulted in transcriptome responses indicative of improved effluent quality. The number of differentially expressed probes in fish downstream of the Kitchener outfall (904-1223) remained comparable to that downstream of Waterloo (767-3867). Noteworthy was that year and the interaction of year and site explained variability in more than twice the number of transcripts than site alone, suggesting that year and the interaction of year and site had a greater effect on the transcriptome than site alone. Gene set enrichment analysis revealed a gradual reduction in the number of gene ontologies over time at exposure sites, which corresponded with lower contaminant load. Subnetwork enrichment analysis revealed that there were noticeable shifts in the cell pathways differently expressed in the liver preupgrade and postupgrade. The dominant pathways altered preupgrade were related to genetic modifications and cell division, whereas postupgrade they were associated with the immune system, reproduction, and biochemical responses. Molecular pathways were dynamic over time, and following the upgrades, there was little evidence that gene expression profiles in fish collected from high-impact sites postupgrade were more similar to those in fish collected from reference site. Environ Toxicol Chem 2017;36:2108-2122. © 2017 SETAC.
Collapse
Affiliation(s)
- Patricija Marjan
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada
| | - Christopher J Martyniuk
- Center for Environmental and Human Toxicology and Department of Physiological Science, Genetics Institute, College of Medicine, University of Florida, Gainesville, Florida
| | - Meghan L M Fuzzen
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada
| | - Deborah L MacLatchy
- Department of Biology, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Mark E McMaster
- Canada Center Inland Waters, National Water Research Institute, Aquatic Contaminant Research Division, Environment Canada, Burlington, Ontario, Canada
| | - Mark R Servos
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada
| |
Collapse
|
24
|
Feswick A, Loughery JR, Isaacs MA, Munkittrick KR, Martyniuk CJ. Molecular initiating events of the intersex phenotype: Low-dose exposure to 17α-ethinylestradiol rapidly regulates molecular networks associated with gonad differentiation in the adult fathead minnow testis. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 181:46-56. [PMID: 27810492 DOI: 10.1016/j.aquatox.2016.10.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 10/23/2016] [Accepted: 10/24/2016] [Indexed: 06/06/2023]
Abstract
Intersex, or the presence of oocytes in the testes, has been documented in fish following exposure to wastewater effluent and estrogenic compounds. However, the molecular networks underlying the intersex condition are not completely known. To address this, we exposed male fathead minnows to a low, environmentally-relevant concentration of 17alpha-ethinylestradiol (EE2) (15ng/L) and measured the transcriptome response in the testis after 96h to identify early molecular initiating events that may proceed the intersex condition. The short-term exposure to EE2 did not affect gonadosomatic index and proportion of gametes within the testes. However, the production of 11-ketotestosterone and testosterone from the testis in vitro was decreased relative to controls. Expression profiling using a 8×60K fathead minnow microarray identified 10 transcripts that were differentially expressed in the testes, the most dramatic change being that of coagulation factor XIII A chain (20-fold increase). Transcripts that included guanine nucleotide binding protein (Beta Polypeptide 2), peroxisome proliferator-activated receptor delta, and WNK lysine deficient protein kinase 1a, were down-regulated by EE2. Subnetwork enrichment analysis revealed that EE2 suppressed transcriptional networks associated with steroid metabolism, hormone biosynthesis, and sperm mobility. Most interesting was that gene networks associated with doublesex and mab-3 related transcription factor 1 (dmrt1) were suppressed in the adult testis, despite the fact that dmrt1 itself was not different in expression from control males. Transcriptional networks involving forkhead box L2 (foxl2) (transcript involved in ovarian follicle development) were increased in expression in the testis. Noteworthy was that a gene network associated to granulosa cell development was increased over 100%, suggesting that this transcriptome network may be important for monitoring estrogenic exposures. Other cell processes rapidly downregulated by EE2 at the transcript level included glucose homeostasis, response to heavy metal, amino acid catabolism, and the cyclooxygenase pathway. Conversely, lymphocyte chemotaxis, intermediate filament polymerization, glucocorticoid metabolism, carbohydrate utilization, and anterior/posterior axis specification were increased. These data provide new insight into the transcriptional responses that are perturbed prior to gonadal remodeling and intersex following exposure to estrogens. These data demonstrate that low concentrations of EE2 (1) rapidly suppresses male hormone production, (2) down-regulate molecular networks related to male sex differentiation, and (3) induce transcriptional networks related to granulosa cell development in the adult testis. These responses are hypothesized to be key molecular initiating events that occur prior to the development of the intersex phenotype following estrogenic exposures.
Collapse
Affiliation(s)
- April Feswick
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada
| | - Jennifer R Loughery
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada
| | - Meghan A Isaacs
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada
| | - Kelly R Munkittrick
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada
| | - Christopher J Martyniuk
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada.
| |
Collapse
|
25
|
Sai L, Dong Z, Li L, Guo Q, Jia Q, Xie L, Bo C, Liu Y, Qu B, Li X, Shao H, Ng JC, Peng C. Gene expression profiles in testis of developing male Xenopus laevis damaged by chronic exposure of atrazine. CHEMOSPHERE 2016; 159:145-152. [PMID: 27288644 DOI: 10.1016/j.chemosphere.2016.05.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 05/03/2016] [Accepted: 05/04/2016] [Indexed: 06/06/2023]
Abstract
As a widely used herbicide, atrazine (AZ) has been extensively studied for its adverse effects on the reproductive system, especially feminization in male animals. However, the relationship of gene expression changes and associated toxicological endpoints remains unclear. In this study, developing Xenopus laevis tadpoles were exposed to concentration of AZ at 0.1, 1, 10 or 100 μg/L continuously. Compared with froglets in the control group, there were no significant differences in body length, body weight, liver weight and hepatosomatic index (HSI) of males in groups treated with AZ for 90 d. At 100 μg/L AZ treatment caused a significant reduction of gonad weight and gonadosomatic index (GSI) of males (p < 0.01). In addition, AZ at all dose levels caused testicular degeneration, especially in froglets from the groups with 0.1 and 100 μg/L which exhibited U-shaped dose-response trend. We further investigated the gene expression changes associated with the testicular degeneration induced by AZ. We found that the expression of 1165 genes was significantly altered with 616 upregulated and 549 downregulated compared to the expression profile of the control animals. KEGG analysis showed that genes which were significantly affected by AZ are mainly involved in arginine and proline metabolism, cell cycle, riboflavin metabolism, spliceosome, base excision repair and progesterone-mediated oocyte maturation pathway. Our results show that AZ may affect reproductive and immune systems by interference with the related gene expression changes during the male X. laevis development. The findings may help to clarify the feminization mechanisms of AZ in male X. laevis.
Collapse
Affiliation(s)
- Linlin Sai
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China
| | - Zhihua Dong
- The 404th Hospital of PLA, Weihai, Shandong, China
| | - Ling Li
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China
| | - Qiming Guo
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China
| | - Qiang Jia
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China
| | - Lin Xie
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China
| | - Cunxiang Bo
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China
| | - Yanzhong Liu
- Weihai Wendeng Center Hospital, Weihai, Shandong, China
| | - Binpeng Qu
- Shandong Medical College, Ji'nan, Shandong, China
| | - Xiangxin Li
- Heze Center for Disease Control and Prevention, Heze, Shandong, China
| | - Hua Shao
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China.
| | - Jack C Ng
- The University of Queensland, National Research Centre for Environmental Toxicology-Entox, Brisbane, Australia
| | - Cheng Peng
- Shandong Academy of Occupational Health and Occupational Medicine, Ji'nan, Shandong, China; The University of Queensland, National Research Centre for Environmental Toxicology-Entox, Brisbane, Australia
| |
Collapse
|
26
|
Puckowski A, Mioduszewska K, Łukaszewicz P, Borecka M, Caban M, Maszkowska J, Stepnowski P. Bioaccumulation and analytics of pharmaceutical residues in the environment: A review. J Pharm Biomed Anal 2016; 127:232-55. [DOI: 10.1016/j.jpba.2016.02.049] [Citation(s) in RCA: 153] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/28/2016] [Accepted: 02/28/2016] [Indexed: 12/17/2022]
|
27
|
Cunha DLD, Silva SMCD, Bila DM, Oliveira JLDM, Sarcinelli PDN, Larentis AL. Regulamentação do estrogênio sintético 17α-etinilestradiol em matrizes aquáticas na Europa, Estados Unidos e Brasil. CAD SAUDE PUBLICA 2016; 32:e00056715. [DOI: 10.1590/0102-311x00056715] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 09/21/2015] [Indexed: 11/22/2022] Open
Abstract
O estrogênio sintético 17α-etinilestradiol, principal componente utilizado em formulações de contraceptivos orais, tem sido apontado como um dos principais compostos responsáveis por provocar efeitos adversos no sistema endócrino de várias espécies. O objetivo deste estudo foi analisar o estado da arte dos dispositivos legais e normativos referentes ao controle desse estrogênio sintético nas águas da Europa e dos Estados Unidos, e traçar um paralelo com a realidade brasileira. No geral, os países têm buscado ampliar a regulamentação e monitoramento de alguns micropoluentes emergentes que antes não eram objeto de atenção por parte dos dispositivos legais. A Europa está mais avançada no que tange à qualidade dos corpos hídricos, enquanto que nos Estados Unidos esta substância é alvo de regulamentação apenas para a água destinada ao consumo humano. No Brasil, ainda não há nenhum dispositivo legal ou normativo que aborde esse estrogênio, o que pode ser associado a uma baixa maturidade do sistema brasileiro quanto ao controle de poluentes hídricos.
Collapse
|
28
|
Depiereux S, De Meulder B, Bareke E, Berger F, Le Gac F, Depiereux E, Kestemont P. Adaptation of a Bioinformatics Microarray Analysis Workflow for a Toxicogenomic Study in Rainbow Trout. PLoS One 2015; 10:e0128598. [PMID: 26186543 PMCID: PMC4506078 DOI: 10.1371/journal.pone.0128598] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 04/28/2015] [Indexed: 12/26/2022] Open
Abstract
Sex steroids play a key role in triggering sex differentiation in fish, the use of exogenous hormone treatment leading to partial or complete sex reversal. This phenomenon has attracted attention since the discovery that even low environmental doses of exogenous steroids can adversely affect gonad morphology (ovotestis development) and induce reproductive failure. Modern genomic-based technologies have enhanced opportunities to find out mechanisms of actions (MOA) and identify biomarkers related to the toxic action of a compound. However, high throughput data interpretation relies on statistical analysis, species genomic resources, and bioinformatics tools. The goals of this study are to improve the knowledge of feminisation in fish, by the analysis of molecular responses in the gonads of rainbow trout fry after chronic exposure to several doses (0.01, 0.1, 1 and 10 μg/L) of ethynylestradiol (EE2) and to offer target genes as potential biomarkers of ovotestis development. We successfully adapted a bioinformatics microarray analysis workflow elaborated on human data to a toxicogenomic study using rainbow trout, a fish species lacking accurate functional annotation and genomic resources. The workflow allowed to obtain lists of genes supposed to be enriched in true positive differentially expressed genes (DEGs), which were subjected to over-representation analysis methods (ORA). Several pathways and ontologies, mostly related to cell division and metabolism, sexual reproduction and steroid production, were found significantly enriched in our analyses. Moreover, two sets of potential ovotestis biomarkers were selected using several criteria. The first group displayed specific potential biomarkers belonging to pathways/ontologies highlighted in the experiment. Among them, the early ovarian differentiation gene foxl2a was overexpressed. The second group, which was highly sensitive but not specific, included the DEGs presenting the highest fold change and lowest p-value of the statistical workflow output. The methodology can be generalized to other (non-model) species and various types of microarray platforms.
Collapse
Affiliation(s)
- Sophie Depiereux
- Unit of research in Environmental and Evolutionary Biology (URBE-NARILIS), Laboratory of Ecophysiology and Ecotoxicology, University of Namur, Namur, Belgium
| | - Bertrand De Meulder
- Unit of Research in Molecular Biology (URBM-NARILIS), University of Namur, Namur, Belgium
| | - Eric Bareke
- Unit of Research in Molecular Biology (URBM-NARILIS), University of Namur, Namur, Belgium
- Sainte-Justine UHC Research Centre, University of Montreal, Montréal (Québec), H3T 1C5, Canada
| | - Fabrice Berger
- Unit of Research in Molecular Biology (URBM-NARILIS), University of Namur, Namur, Belgium
| | - Florence Le Gac
- Institut National de la Recherche Agronomique, INRA-LPGP, UPR1037, Campus de Beaulieu, 35042, Rennes, France
| | - Eric Depiereux
- Unit of Research in Molecular Biology (URBM-NARILIS), University of Namur, Namur, Belgium
| | - Patrick Kestemont
- Unit of research in Environmental and Evolutionary Biology (URBE-NARILIS), Laboratory of Ecophysiology and Ecotoxicology, University of Namur, Namur, Belgium
| |
Collapse
|
29
|
Bahamonde PA, McMaster ME, Servos MR, Martyniuk CJ, Munkittrick KR. Molecular pathways associated with the intersex condition in rainbow darter (Etheostoma caeruleum) following exposures to municipal wastewater in the Grand River basin, ON, Canada. Part B. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 159:302-316. [PMID: 25542366 DOI: 10.1016/j.aquatox.2014.11.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 11/24/2014] [Accepted: 11/25/2014] [Indexed: 06/04/2023]
Abstract
Rainbow darter (Etheostoma caeruleum; RBD) is a small benthic fish found in North America. This species is sensitive to sewage effluent, and intersex is found in up to 80% of males in near-field areas in the Grand River, Ontario, Canada. To learn more about the molecular signaling cascades associated with intersex, a developed customized oligonucleotide microarray (4×180 K) using next generation sequencing was developed to characterize the transcriptome in the gonad of male and female RBD. Gene expression profiling was performed in males and females from both a reference site and a polluted site. Males with and without intersex condition from the areas closest to effluent outfalls were compared to males and females from a reference site. Microarray analysis revealed that there was increased mRNA abundance for genes associated with oogenesis in intersex males (i.e. the presence of eggs within the testis), and a decrease in mRNA abundance for genes associated with spermatid development. In females exposed to effluent, cell processes related with hatching and ovulation were down-regulated, and genes involved in immune responses were increased in abundance. In the non-intersex males exposed to effluent, cell processes such as sperm cell adhesion were decreased at the transcript level relative to males from the reference site. Microarray analysis revealed that heat shock proteins (HSP) were significantly increased in non-intersex males exposed to effluent; however, HSPs were not differentially expressed in intersex males exposed to the effluent. Genes involved in sex differentiation (sox9, foxl2 and dmrt1) and reproduction (esr1, esrb, ar, vtg, cyp19a1 and cyp11a) were measured in males, females, and intersex individuals. Consistent with the intersex condition, many transcripts showed an intermediate expression level in intersex males when compared to phenotypic males and females. This study improves our knowledge regarding the molecular pathways that underlie the intersex condition and develops a suite of qPCR bioassays in RBD that are able to discriminate pollutant-exposed males without intersex from those males with intersex. Part A of this study reports on the effects of municipal wastewater effluents (MWWEs) on RBD in the Grand River and demonstrates that there are disruptions in higher level endpoints that include altered steroid levels. Here we develop a new tool for assessing and monitoring the intersex condition in RBD in polluted natural environments and begin to characterize gene networks that are associated with the condition.
Collapse
Affiliation(s)
- P A Bahamonde
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, NB, Canada E2L 4L5.
| | - M E McMaster
- Emerging Methods Branch, Aquatic Contaminant Research Division, Water Science and Technology Directorate, Environment Canada, Burlington, ON, Canada L7R 4A6
| | - M R Servos
- Canadian Rivers Institute and University of Waterloo, Department of Biology, Waterloo, ON, Canada N2L 3G1
| | - C J Martyniuk
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, NB, Canada E2L 4L5
| | - K R Munkittrick
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, NB, Canada E2L 4L5
| |
Collapse
|
30
|
Kobayashi T, Kumakura M, Yoshie S, Sugishima T, Horie Y. Dynamics of testis-ova in a wild population of Japanese pond frogs,Rana nigromaculata. ACTA ACUST UNITED AC 2014; 323:74-9. [DOI: 10.1002/jez.1898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 09/03/2014] [Accepted: 09/06/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology; Institute for Environmental Sciences; University of Shizuoka; Suruga-ku Shizuoka Japan
- Laboratory of Molecular Reproductive Biology; Graduate School of Integrated Pharmaceutical and Nutritional Sciences; University of Shizuoka; Suruga-ku Shizuoka Japan
| | - Masahiko Kumakura
- Department of Histology, School of Life Dentistry at Niigata; The Nippon Dental University; Chuo-ku Niigata Japan
| | - Sumio Yoshie
- Department of Histology, School of Life Dentistry at Niigata; The Nippon Dental University; Chuo-ku Niigata Japan
| | - Tomomi Sugishima
- Laboratory of Molecular Reproductive Biology; Institute for Environmental Sciences; University of Shizuoka; Suruga-ku Shizuoka Japan
| | - Yoshifumi Horie
- Laboratory of Molecular Reproductive Biology; Institute for Environmental Sciences; University of Shizuoka; Suruga-ku Shizuoka Japan
- Laboratory of Molecular Reproductive Biology; Graduate School of Integrated Pharmaceutical and Nutritional Sciences; University of Shizuoka; Suruga-ku Shizuoka Japan
| |
Collapse
|
31
|
Rochman CM, Kurobe T, Flores I, Teh SJ. Early warning signs of endocrine disruption in adult fish from the ingestion of polyethylene with and without sorbed chemical pollutants from the marine environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 493:656-61. [PMID: 24995635 DOI: 10.1016/j.scitotenv.2014.06.051] [Citation(s) in RCA: 392] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 06/13/2014] [Accepted: 06/13/2014] [Indexed: 05/04/2023]
Abstract
Plastic debris is associated with several chemical pollutants known to disrupt the functioning of the endocrine system. To determine if the exposure to plastic debris and associated chemicals promotes endocrine-disrupting effects in fish, we conducted a chronic two-month dietary exposure using Japanese medaka (Oryzias latipes) and environmentally relevant concentrations of microplastic (<1mm) and associated chemicals. We exposed fish to three treatments: a no-plastic (i.e. negative control), virgin-plastic (i.e. virgin polyethylene pre-production pellets) and marine-plastic treatment (i.e. polyethylene pellets deployed in San Diego Bay, CA for 3 months). Altered gene expression was observed in male fish exposed to the marine-plastic treatment, whereas altered gene expression was observed in female fish exposed to both the marine- and virgin-plastic treatment. Significant down-regulation of choriogenin (Chg H) gene expression was observed in males and significant down-regulation of vitellogenin (Vtg I), Chg H and the estrogen receptor (ERα) gene expression was observed in females. In addition, histological observation revealed abnormal proliferation of germ cells in one male fish from the marine-plastic treatment. Overall, our study suggests that the ingestion of plastic debris at environmentally relevant concentrations may alter endocrine system function in adult fish and warrants further research.
Collapse
Affiliation(s)
- Chelsea M Rochman
- Aquatic Health Program, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA.
| | - Tomofumi Kurobe
- Aquatic Health Program, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Ida Flores
- Aquatic Health Program, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Swee J Teh
- Aquatic Health Program, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| |
Collapse
|
32
|
Young J, Iwanowicz L, Sperry A, Blazer V. A landscape-based reconnaissance survey of estrogenic activity in streams of the upper Potomac, upper James, and Shenandoah Rivers, USA. ENVIRONMENTAL MONITORING AND ASSESSMENT 2014; 186:5531-45. [PMID: 24816593 DOI: 10.1007/s10661-014-3801-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 04/30/2014] [Indexed: 05/22/2023]
Abstract
Endocrine-disrupting compounds (EDCs) are becoming of increasing concern in waterways of the USA and worldwide. What remains poorly understood, however, is how prevalent these emerging contaminants are in the environment and what methods are best able to determine landscape sources of EDCs. We describe the development of a spatially structured sampling design and a reconnaissance survey of estrogenic activity along gradients of land use within sub-watersheds. We present this example as a useful approach for state and federal agencies with an interest in identifying locations potentially impacted by EDCs that warrant more intensive, focused research. Our study confirms the importance of agricultural activities on levels of a measured estrogenic equivalent (E2Eq) and also highlights the importance of other potential sources of E2Eq in areas where intensive agriculture is not the dominant land use. Through application of readily available geographic information system (GIS) data, coupled with spatial statistical analysis, we demonstrate the correlation of specific land use types to levels of estrogenic activity across a large area in a consistent and unbiased manner.
Collapse
Affiliation(s)
- John Young
- Aquatic Ecology Branch, USGS Leetown Science Center, 11649 Leetown Road, Kearneysville, WV, 25430, USA,
| | | | | | | |
Collapse
|
33
|
Aris AZ, Shamsuddin AS, Praveena SM. Occurrence of 17α-ethynylestradiol (EE2) in the environment and effect on exposed biota: a review. ENVIRONMENT INTERNATIONAL 2014; 69:104-19. [PMID: 24825791 DOI: 10.1016/j.envint.2014.04.011] [Citation(s) in RCA: 317] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 04/06/2014] [Accepted: 04/13/2014] [Indexed: 05/17/2023]
Abstract
17α-ethynylestradiol (EE2) is a synthetic hormone, which is a derivative of the natural hormone, estradiol (E2). EE2 is an orally bio-active estrogen, and is one of the most commonly used medications for humans as well as livestock and aquaculture activity. EE2 has become a widespread problem in the environment due to its high resistance to the process of degradation and its tendency to (i) absorb organic matter, (ii) accumulate in sediment and (iii) concentrate in biota. Numerous studies have reported the ability of EE2 to alter sex determination, delay sexual maturity, and decrease the secondary sexual characteristics of exposed organisms even at a low concentration (ng/L) by mimicking its natural analogue, 17β-estradiol (E2). Thus, the aim of this review is to provide an overview of the science regarding EE2, the concentration levels in the environment (water, sediment and biota) and summarize the effects of this compound on exposed biota at various concentrations, stage life, sex, and species. The challenges in respect of EE2 include the extension of the limited database on the EE2 pollution profile in the environment, its fate and transport mechanism, as well as the exposure level of EE2 for better prediction and definition revision of EE2 toxicity end points, notably for the purpose of environmental risk assessment.
Collapse
Affiliation(s)
- Ahmad Zaharin Aris
- Environmental Forensics Research Centre, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Department of Environmental Sciences, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
| | - Aida Soraya Shamsuddin
- Environmental Forensics Research Centre, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Sarva Mangala Praveena
- Department of Environmental and Occupational Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| |
Collapse
|
34
|
Horie Y, Kobayashi T. Relationships between gonadal and gonadotrophic differentiation during early gonadal sex differentiation in several strains from the Southern population of Japanese medaka (Oryzias latipes). ACTA ACUST UNITED AC 2014; 321:472-7. [DOI: 10.1002/jez.1879] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/14/2014] [Accepted: 06/06/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Yoshifumi Horie
- Laboratory of Molecular Reproductive Biology; Graduate School of Integrated Pharmaceutical and Nutritional Sciences; University of Shizuoka; Shizuoka Japan
| | - Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology; Institute for Environmental Sciences; University of Shizuoka; Shizuoka Japan
- Laboratory of Molecular Reproductive Biology; Graduate Division of Nutritional and Environmental Sciences; University of Shizuoka; Shizuoka Japan
| |
Collapse
|
35
|
Depiereux S, Liagre M, Danis L, De Meulder B, Depiereux E, Segner H, Kestemont P. Intersex occurrence in rainbow trout (Oncorhynchus mykiss) male fry chronically exposed to ethynylestradiol. PLoS One 2014; 9:e98531. [PMID: 25033040 PMCID: PMC4102465 DOI: 10.1371/journal.pone.0098531] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 05/05/2014] [Indexed: 11/20/2022] Open
Abstract
This study aimed to investigate the male-to-female morphological and physiological transdifferentiation process in rainbow trout (Oncorhynchus mykiss) exposed to exogenous estrogens. The first objective was to elucidate whether trout develop intersex gonads under exposure to low levels of estrogen. To this end, the gonads of an all-male population of fry exposed chronically (from 60 to 136 days post fertilization – dpf) to several doses (from environmentally relevant 0.01 µg/L to supra-environmental levels: 0.1, 1 and 10 µg/L) of the potent synthetic estrogen ethynylestradiol (EE2) were examined histologically. The morphological evaluations were underpinned by the analysis of gonad steroid (testosterone, estradiol and 11-ketotestosterone) levels and of brain and gonad gene expression, including estrogen-responsive genes and genes involved in sex differentiation in (gonads: cyp19a1a, ER isoforms, vtg, dmrt1, sox9a2; sdY; cyp11b; brain: cyp19a1b, ER isoforms). Intersex gonads were observed from the first concentration used (0.01 µg EE2/L) and sexual inversion could be detected from 0.1 µg EE2/L. This was accompanied by a linear decrease in 11-KT levels, whereas no effect on E2 and T levels was observed. Q-PCR results from the gonads showed downregulation of testicular markers (dmrt1, sox9a2; sdY; cyp11b) with increasing EE2 exposure concentrations, and upregulation of the female vtg gene. No evidence was found for a direct involvement of aromatase in the sex conversion process. The results from this study provide evidence that gonads of male trout respond to estrogen exposure by intersex formation and, with increasing concentration, by morphological and physiological conversion to phenotypic ovaries. However, supra-environmental estrogen concentrations are needed to induce these changes.
Collapse
Affiliation(s)
- Sophie Depiereux
- Unit of Research in Environmental and Evolutionary Biology (URBE-NARILIS), Laboratory of Ecophysiology and Ecotoxicology, University of Namur, Namur, Belgium
- * E-mail: (SD); (PK)
| | - Mélanie Liagre
- Unit of Research in Environmental and Evolutionary Biology (URBE-NARILIS), Laboratory of Ecophysiology and Ecotoxicology, University of Namur, Namur, Belgium
| | - Lorraine Danis
- Unit of Research in Environmental and Evolutionary Biology (URBE-NARILIS), Laboratory of Ecophysiology and Ecotoxicology, University of Namur, Namur, Belgium
| | - Bertrand De Meulder
- Unit of Research in Molecular Biology (URBM-NARILIS), University of Namur, Namur, Belgium
| | - Eric Depiereux
- Unit of Research in Molecular Biology (URBM-NARILIS), University of Namur, Namur, Belgium
| | - Helmut Segner
- Centre for Fish and Wildlife Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Patrick Kestemont
- Unit of Research in Environmental and Evolutionary Biology (URBE-NARILIS), Laboratory of Ecophysiology and Ecotoxicology, University of Namur, Namur, Belgium
- * E-mail: (SD); (PK)
| |
Collapse
|
36
|
Prado PS, Pinheiro APB, Bazzoli N, Rizzo E. Reproductive biomarkers responses induced by xenoestrogens in the characid fish Astyanax fasciatus inhabiting a South American reservoir: an integrated field and laboratory approach. ENVIRONMENTAL RESEARCH 2014; 131:165-73. [PMID: 24721135 DOI: 10.1016/j.envres.2014.03.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 01/24/2014] [Accepted: 03/07/2014] [Indexed: 05/21/2023]
Abstract
Field studies evaluating the effects of endocrine disruption chemicals (EDCs) on the fish reproduction are scarce worldwide. The goal of this study was to assess hepatic levels of vitellogenin (Vtg), zona radiata proteins (Zrp) and insulin-like growth factors (IGF-I and IGF-II), and relating them to reproductive endpoints in a wild fish population habiting a reservoir that receive domestic sewage, agricultural and industrial residues. Adult fish Astyanax fasciatus were sampled during the reproductive season in five sites from the Furnas Reservoir, Grande River, and Paraguay-Paraná basin. As a control to field data, fish were experimentally exposed via dietary intake, to oestradiol benzoate (OB) for 7 days. Fish from site with little anthropogenic interference showed hepatic levels of Vtg, Zrp and IGF-I and IGF-II similar to those from the non-treated experimental group. In sites located immediately downstream from the municipal wastewater discharges, the water total oestrogen was >120 ng/l, and male fish displayed increased Vtg and Zrp and decreased IGF-I levels similar to OB treated fish. In females, levels of Vtg, Zrp, IGF-I and IGF-II suggest an impairment of final oocyte maturation and spawning, as also detected by frequency of over-ripening, follicular atresia and fecundity. At the sites that receive agricultural and industrial residues, the water total oestrogen was <50 ng/l and females showed decreased Zrp and increased IGF-II levels associated to reduced diameter of vitellogenic follicles, indicating an inhibition of oocyte growth. Overall, the current study reports oestrogenic contamination impairing the reproduction of a wild fish from a hydroeletric reservoir and, the data contribute to improving the current knowledge on relationship between hepatic Vtg, Zrp and IGF-I and IGF-II, and reproductive endpoints in a teleost fish. In addition, our data point out novel reproductive biomarkers (IGF-I, IGF-II and over-ripening) to assessing xenoestrogenic contamination in freshwater ecosystems.
Collapse
Affiliation(s)
- Paula S Prado
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P. 486, 30161-970, Minas Gerais, Brasil
| | - Ana Paula B Pinheiro
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P. 486, 30161-970, Minas Gerais, Brasil
| | - Nilo Bazzoli
- Programa de Pós-Graduação em Zoologia de Vertebrados, Pontifícia Universidade Católica de Minas Gerais, PUC Minas, Belo Horizonte 30535-610, Minas Gerais, Brasil
| | - Elizete Rizzo
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P. 486, 30161-970, Minas Gerais, Brasil.
| |
Collapse
|
37
|
Harding LB, Schultz IR, Goetz GW, Luckenbach JA, Young G, Goetz FW, Swanson P. High-throughput sequencing and pathway analysis reveal alteration of the pituitary transcriptome by 17α-ethynylestradiol (EE2) in female coho salmon, Oncorhynchus kisutch. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 142-143:146-163. [PMID: 24007788 DOI: 10.1016/j.aquatox.2013.07.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Revised: 07/26/2013] [Accepted: 07/31/2013] [Indexed: 06/02/2023]
Abstract
Considerable research has been done on the effects of endocrine disrupting chemicals (EDCs) on reproduction and gene expression in the brain, liver and gonads of teleost fish, but information on impacts to the pituitary gland are still limited despite its central role in regulating reproduction. The aim of this study was to further our understanding of the potential effects of natural and synthetic estrogens on the brain-pituitary-gonad axis in fish by determining the effects of 17α-ethynylestradiol (EE2) on the pituitary transcriptome. We exposed sub-adult coho salmon (Oncorhynchus kisutch) to 0 or 12 ng EE2/L for up to 6 weeks and effects on the pituitary transcriptome of females were assessed using high-throughput Illumina(®) sequencing, RNA-Seq and pathway analysis. After 1 or 6 weeks, 218 and 670 contiguous sequences (contigs) respectively, were differentially expressed in pituitaries of EE2-exposed fish relative to control. Two of the most highly up- and down-regulated contigs were luteinizing hormone β subunit (241-fold and 395-fold at 1 and 6 weeks, respectively) and follicle-stimulating hormone β subunit (-3.4-fold at 6 weeks). Additional contigs related to gonadotropin synthesis and release were differentially expressed in EE2-exposed fish relative to controls. These included contigs involved in gonadotropin releasing hormone (GNRH) and transforming growth factor-β signaling. There was an over-representation of significantly affected contigs in 33 and 18 canonical pathways at 1 and 6 weeks, respectively, including circadian rhythm signaling, calcium signaling, peroxisome proliferator-activated receptor (PPAR) signaling, PPARα/retinoid x receptor α activation, and netrin signaling. Network analysis identified potential interactions between genes involved in circadian rhythm and GNRH signaling, suggesting possible effects of EE2 on timing of reproductive events.
Collapse
Affiliation(s)
- Louisa B Harding
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USA
| | | | | | | | | | | | | |
Collapse
|
38
|
Chishti YZ, Feswick A, Munkittrick KR, Martyniuk CJ. Transcriptomic profiling of progesterone in the male fathead minnow (Pimephales promelas) testis. Gen Comp Endocrinol 2013; 192:115-25. [PMID: 23665105 DOI: 10.1016/j.ygcen.2013.04.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 04/23/2013] [Accepted: 04/28/2013] [Indexed: 12/16/2022]
Abstract
P4 is a hormone with diverse functions that include roles in reproduction, growth, and development. The objectives of this study were to examine the effects of P4 on androgen production in the mature teleost testis and to identify molecular signaling cascades regulated by P4 to improve understanding of its role in male reproduction. Fathead minnow (FHM) testis explants were treated in vitro with two concentrations of P4 (10(-8) and 10(-6) M) for 6 and 12 h. P4 significantly increased testosterone (T) production in the FHM testis but did not affect 11-ketotestosterone. Gene network analysis revealed that insulin growth factor (Igf1) and tumor necrosis factor receptor (Tnfr) signaling was significantly depressed with P4 treatment after 12h. There was also a 20% increase in a gene network for follicle-stimulating hormone secretion and an 18% decrease in genes involved in vasopressin signaling. Genes in steroid metabolism (e.g. star, cyp19a, 11bhsd) were not significantly affected by P4 treatments in this study, and it is hypothesized that pre-existing molecular machinery may be more involved in the increased production of T rather than the de novo expression of steroid-related transcripts and receptors. There was a significant decrease in prostaglandin E synthase 3b (cytosolic) (ptges3b) after treatment with P4, suggesting that there is cross talk between P4 and prostaglandin pathways in the reproductive testis. P4 has a role in regulating steroid production in the male testis and may do so by modulating gene networks related to endocrine pathways, such as Igf1, Tnfr, and vasopressin.
Collapse
Key Words
- 11-KT
- 11-ketotestosterone
- 3-phosphoinositide dependent protein kinase-1
- AKT1
- APOE
- APP
- AR
- Androgens
- B-cell CLL/lymphoma 6
- BCL2-like 1
- BCL2L1
- BCL6
- BMP2
- BMP4
- CCAAT/enhancer binding protein (C/EBP), alpha
- CD40
- CD40 molecule, TNF receptor superfamily member 5
- CEBPA
- CHAT
- CPLA2
- CTSK
- CYP19a
- EGFR
- EPCAM
- ESR
- F2RL1
- FBJ murine osteosarcoma viral oncogene homolog
- FOS
- FOS-like antigen 1
- FOSL1
- FOXO1
- Gene set enrichment analysis
- HIF1A
- HSD11B2
- HSD17B1
- HSP70
- ID2
- IGF1
- IGF1R
- IGF2
- IGF2R
- IL12B
- INS
- IRS1
- ITGAV
- Insulin growth factor
- JAK1
- JAK2
- Janus kinase 1
- Janus kinase 2
- LOX
- MAP2K1
- MITF
- MMP9
- NAMPT
- NFKBIA
- NOS2
- P4
- PDPK1
- PI3K
- PIP3
- PLAT
- PTGES3B
- PTGS2
- Phosphatidylinositol (3,4,5)-triphosphate
- Phospholipase A2
- Progestogens
- RAC-α serine/threonine-protein kinase
- Runt
- SNEA
- SP1
- STAR
- STAT1
- STAT3
- STAT5A
- Sp1 transcription factor
- Sub-network enrichment analysis
- T
- TNFR adaptor protein
- TNFRAP
- TNFRSF11A
- TNFRSF11B
- TNFSF11
- TNFSF18
- Tumor necrosis factor
- XPR1
- amyloid β (A4) precursor protein
- androgen receptor
- apolipoprotein E
- bone morphogenetic protein 2
- bone morphogenetic protein 4
- cathepsin K
- choline O-acetyltransferase
- coagulation factor II (thrombin) receptor-like 1
- cytochrome P450 aromatase
- epidermal growth factor receptor
- epithelial cell adhesion molecule
- estrogen receptor
- forkhead box O1
- heat shock protein 70
- hydroxysteroid (11-β) dehydrogenase 2
- hydroxysteroid (17-β) dehydrogenase 1
- hypoxia inducible factor 1, α subunit (basic helix-loop-helix transcription factor)
- inhibitor of DNA binding 2
- insulin
- insulin receptor substrate 1
- insulin-like growth factor 1 (somatomedin C)
- insulin-like growth factor 1 receptor
- insulin-like growth factor 2 (somatomedin A)
- insulin-like growth factor 2 receptor
- integrin, alpha V (vitronectin receptor, alpha polypeptide, antigen CD51)
- interleukin 12B (natural killer cell stimulatory factor 2, cytotoxic lymphocyte maturation factor 2, p40)
- lysyl oxidase
- matrix metallopeptidase 9 (gelatinase B, 92kDa gelatinase, 92kDa type IV collagenase)
- microphthalmia-associated transcription factor
- mitogen-activated protein kinase kinase 1
- nicotinamide phosphoribosyltransferase
- nitric oxide synthase 2, inducible
- nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha
- phosphatidylinositol 3-kinase
- phosphatidylinositol 3-phosphate
- plasminogen activator, tissue
- progesterone
- prostaglandin E synthase 3
- prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)
- signal transducer and activator of transcription 1, 91kDa
- signal transducer and activator of transcription 3 (acute-phase response factor)
- signal transducer and activator of transcription 5A
- steroidogenic acute regulatory protein
- sub-network enrichment analysis
- testosterone
- tumor necrosis factor (ligand) superfamily, member 11
- tumor necrosis factor (ligand) superfamily, member 18
- tumor necrosis factor receptor superfamily, member 11a, NFKB activator
- tumor necrosis factor receptor superfamily, member 11b
- xenotropic and polytropic retrovirus receptor 1
Collapse
Affiliation(s)
- Yasmin Z Chishti
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5
| | | | | | | |
Collapse
|
39
|
Bahamonde PA, Munkittrick KR, Martyniuk CJ. Intersex in teleost fish: are we distinguishing endocrine disruption from natural phenomena? Gen Comp Endocrinol 2013; 192:25-35. [PMID: 23603430 DOI: 10.1016/j.ygcen.2013.04.005] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 04/03/2013] [Accepted: 04/04/2013] [Indexed: 01/11/2023]
Abstract
Intersex is defined as the simultaneous presence of male and female gonadal tissue in a gonochoristic (fixed-sex) species. The intersex condition has been documented in both wild and laboratory animals, including fish, amphibians, and reptiles. In aquatic animals, intersex is often viewed as a signature effect of exposure to endocrine disrupting compounds. At least 37 fish species from 17 families have been identified with intersex gonads in 54 field survey studies. However, reports of the occurrence of intersex at reference sites have led to speculation that a baseline level of intersex is "normal". The objective of this critical review was to assess factors potentially associated with baseline levels of intersex in fish and to examine the mechanisms involved in the intersex condition in order to identify priority research areas. Based on current literature, the relationship between intersex and physiological parameters such as plasma sex steroids and vitellogenin is not well characterized or conclusive. Moreover, the literature is not definitive on whether field studies are distinguishing between natural intersex and intersex due to stressors. High throughput transcriptomics will improve understanding of how intersex condition manifests after exposure to aquatic pollution and it is recommended that studies consider both males with and without intersex that inhabit the same polluted site in order to differentiate pathways associated with xenobiotic responses versus molecular pathways associated with intersex. Other experimental design considerations for field studies examining intersex include data collection on life history (e.g. migratory patterns) and improved reference site characterization.
Collapse
Affiliation(s)
- Paulina A Bahamonde
- Canadian Rivers Institute and Department of Biology, University of New Brunswick, Saint John, NB, Canada E2L 4L5.
| | | | | |
Collapse
|
40
|
Burkina V, Zlabek V, Zamaratskaia G. Clotrimazole, but not dexamethasone, is a potent in vitro inhibitor of cytochrome P450 isoforms CYP1A and CYP3A in rainbow trout. CHEMOSPHERE 2013; 92:1099-1104. [PMID: 23466084 DOI: 10.1016/j.chemosphere.2013.01.050] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 01/07/2013] [Accepted: 01/20/2013] [Indexed: 06/01/2023]
Abstract
The effects of clotrimazole (CLO) and dexamethasone (DEX), both detected in the aquatic environment, were assessed on inhibition of cytochrome P450 (CYP450) in hepatic microsomes of rainbow trout. Activity of three CYP450 isoforms: ethoxyresorufin O-deethylase (EROD; CYP1A), 7-benzyloxy-4-trifluoromethylcoumarin O-debenzylase (BFCOD; CYP3A) and p-nitrophenol hydroxylase (PNPH; CYP2E1-like protein) was investigated in the presence of four concentrations of CLO and DEX. Clotrimazole in a concentration range of 1-100μM decreased the activity of EROD and BFCOD. The inhibition was reversible, as pre-incubation of the microsomes with CLO, before addition of the substrate, had no effect. EROD activity was non-competitively inhibited with a Ki of 0.5μM, and BFCOD activity revealed competitive inhibition with a Ki of 0.04μM. The relatively low Ki for CLO inhibition of EROD and BFCOD activity may indicate that the ability of CYP1A and CYP3A to metabolize xenobiotics is reduced in the presence of CLO. PNPH activity was not affected by CLO. DEX showed no inhibitory potency on any investigated reaction. CLO, but not DEX, inhibited EROD and BFCOD activity by different mechanisms.
Collapse
Affiliation(s)
- Viktoriia Burkina
- University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zatisi 728/II, Vodnany 389 25, Czech Republic.
| | | | | |
Collapse
|
41
|
Anchoring ethinylestradiol induced gene expression changes with testicular morphology and reproductive function in the medaka. PLoS One 2012; 7:e52479. [PMID: 23300682 PMCID: PMC3530452 DOI: 10.1371/journal.pone.0052479] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 11/19/2012] [Indexed: 01/03/2023] Open
Abstract
Environmental estrogens are ubiquitous in the environment and can cause detrimental effects on male reproduction. In fish, a multitude of effects from environmental estrogens have been observed including altered courting behavior and fertility, sex reversal, and gonadal histopathology. However, few studies in fish assess the impacts of estrogenic exposure on a physiological endpoint, such as reproduction, as well as the associated morphologic response and underlying global gene expression changes. This study assessed the implications of a 14 day sub-chronic exposure of ethinylestradiol (EE2; 1.0 or 10.0 µg/L EE2) on male medaka fertility, testicular histology and testicular gene expression. The findings demonstrate that a 14 day exposure to EE2 induced impaired male reproductive capacity and time- and dose-dependent alterations in testicular morphology and gene expression. The average fertilization rate/day following the exposure for control, 1.0 and 10.0 µg/L EE2 was 91.3% (±4.4), 62.8% (±8.3) and 28.8% (±5.8), respectively. The testicular morphologic alterations included increased germ cell apoptosis, decreased germinal epithelium and thickening of the interstitium. These changes were highly associated with testicular gene expression changes using a medaka-specific microarray. A pathway analysis of the differentially expressed genes emphasized genes and pathways associated with apoptosis, cell cycle and proliferation, collagen production/extracellular matrix organization, hormone signaling, male reproduction and protein ubiquitination among others. These findings highlight the importance of anchoring global gonadal gene expression changes with morphology and ultimately with tissue/organ function.
Collapse
|
42
|
Zhou L, Charkraborty T, Yu X, Wu L, Liu G, Mohapatra S, Wang D, Nagahama Y. R-spondins are involved in the ovarian differentiation in a teleost, medaka (Oryzias latipes). BMC DEVELOPMENTAL BIOLOGY 2012; 12:36. [PMID: 23217106 PMCID: PMC3542121 DOI: 10.1186/1471-213x-12-36] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 11/13/2012] [Indexed: 02/04/2023]
Abstract
Background In mammals, R-spondin (Rspo), an activator of the Wnt/β-catenin signaling pathway, has been shown to be involved in ovarian differentiation. However, the role of the Rspo/Wnt/β-catenin signaling pathway in fish gonads is still unknown. Results In the present study, full-length cDNAs of Rspo1, 2 and 3 were cloned from the gonads of medaka (Oryzias latipes). The deduced amino acid sequences of mRspo1-3 were shown to have a similar structural organization. Phylogenetic analysis showed that Rspo1, 2 and 3 were specifically clustered into three distinct clads. Tissue distribution revealed that three Rspo genes were abundantly expressed in the brain and ovary. Real-time PCR analysis around hatching (S33-5dah) demonstrated that three Rspo genes were specifically enhanced in female gonads from S38. In situ hybridization (ISH) analysis demonstrated that three Rspo genes were expressed in the germ cell in ovary, but not in testis. Fluorescence multi-color ISH showed that Rspo1 was expressed in both somatic cells and germ cells at 10dah. Exposure to ethinylestradiol (EE2) in XY individuals for one week dramatically enhanced the expression of three Rspo genes both at 0dah and in adulthood. Conclusions These results suggest that the Rspo-activating signaling pathway is involved in the ovarian differentiation and maintenance in medaka.
Collapse
Affiliation(s)
- Linyan Zhou
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Science, Southwest University, Chongqing, PR China
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Hirakawa I, Miyagawa S, Mitsui N, Miyahara M, Onishi Y, Kagami Y, Kusano T, Takeuchi T, Ohta Y, Iguchi T. Developmental disorders and altered gene expression in the tropical clawed frog (Silurana tropicalis) exposed to 17α-ethinylestradiol. J Appl Toxicol 2012; 33:1001-10. [DOI: 10.1002/jat.2836] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 09/14/2012] [Accepted: 09/27/2012] [Indexed: 11/05/2022]
Affiliation(s)
| | - Shinichi Miyagawa
- Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences; The Graduate University for Advanced Studies; 5-1 Higashiyama, Myodaiji; Okazaki; Aichi; 444-8787; Japan
| | - Naoko Mitsui
- Institute of Environmental Ecology, IDEA Consultants Inc.; 1334-5 Riemon, Ooigawa; Shida; Shizuoka; 421-0212; Japan
| | - Maki Miyahara
- Institute of Environmental Ecology, IDEA Consultants Inc.; 1334-5 Riemon, Ooigawa; Shida; Shizuoka; 421-0212; Japan
| | - Yuta Onishi
- Institute of Environmental Ecology, IDEA Consultants Inc.; 1334-5 Riemon, Ooigawa; Shida; Shizuoka; 421-0212; Japan
| | | | | | | | | | - Taisen Iguchi
- Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences; The Graduate University for Advanced Studies; 5-1 Higashiyama, Myodaiji; Okazaki; Aichi; 444-8787; Japan
| |
Collapse
|
44
|
Zhang Y, Wang H, Qin F, Liu S, Wu T, Li M, Xu P, Zhang X, Wang X, Hu G, Yuan C, Wang Z. Molecular characterization of estrogen receptor genes in loach Paramisgurnus dabryanus and their expression upon 17α-ethinylestradiol exposure in juveniles. Gen Comp Endocrinol 2012; 178:194-205. [PMID: 22705038 DOI: 10.1016/j.ygcen.2012.06.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 05/30/2012] [Accepted: 06/01/2012] [Indexed: 11/30/2022]
Abstract
The full-length cDNAs for estrogen receptor 1 (esr1), esr2a and esr2b were isolated and characterized from the loach (Paramisgurnus dabryanus, Cobitidae, cypriniformes). P. dabryanus Esr1, Esr2a and Esr2b share high amino acids identities with their counterparts of cyprinid species. Quantitative real-time PCR (qRT-PCR) was used to analyze the tissue distribution of esr mRNAs in one-year-old P. dabryanus. The mRNA expression of esr1 in female liver was extremely higher than that in other tissues. esr2a mRNA expression in female intestine and in male muscle was higher than that in other tissues. esr2b mRNA expression was the highest in both male and female intestine. Two-month-old P. dabryanus were exposed to 17α-ethinylestradiol (EE2) for 3weeks and the changes of esr mRNA expression in brain, gonad and liver were analyzed by qRT-PCR. Results showed that EE2 at 1, 5 and 25 ng/L significantly suppressed testicular esr1 mRNA expression in male. The ovarian esr2a mRNA expression was significantly up-regulated at 1 ng/L EE2. In female brain, esr1 mRNA expression was significantly down-regulated at 5 ng/L EE2. Both in males and females, EE2 exposure increased the hepatic esr1 mRNA expression in a concentration-dependent manner. The present study suggests that different esrs in different tissues have differential responsiveness to EE2 and the hepatic esr1 is a sensitive biomarker to EE2 at environmental concentrations in P. dabryanus juveniles. So, the loach P. dabryanus, a typical demersal fish, is a promising ecological model organism to detect estrogenic chemicals in the sediment of aquatic environment by using molecular biomarkers.
Collapse
Affiliation(s)
- Yingying Zhang
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, Shaanxi 712100, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|