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Pandelides Z, Sturgis MC, Thornton C, Aluru N, Willett KL. Benzo[a]pyrene-induced multigenerational changes in gene expression, behavior, and DNA methylation are primarily influenced by paternal exposure. Toxicol Appl Pharmacol 2023; 469:116545. [PMID: 37146889 DOI: 10.1016/j.taap.2023.116545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 04/21/2023] [Accepted: 05/02/2023] [Indexed: 05/07/2023]
Abstract
Benzo[a]pyrene (BaP), a polycyclic aromatic hydrocarbon (PAH), is implicated in many developmental and behavioral adverse outcomes in offspring of exposed parents. The objective of this study was to investigate sex-dependent multigenerational effects of preconceptional effects of BaP exposure. Adult wild-type (5D) zebrafish were fed 708 μg BaP/g diet (measured) at a rate of 1% body weight twice/day (14 μg BaP/g fish/day) for 21 days. Fish were spawned using a crossover design, and parental (F0) behavior and reproductive indexes were measured. In offspring, behavioral effects were measured at 96 h post fertilization (hpf) in F1 & F2 larvae, and again when F1s were adults. Compared to controls, there was no significant effect on F0 adult behavior immediately following exposure, but locomotor activity was significantly increased in F1 adults of both sexes. Larval behavior (96 hpf, photomotor response assay) was significantly altered in both the F1 and F2 generations. To assess molecular changes associated with BaP exposure, we conducted transcriptome and DNA methylation profiling in F0 gametes (sperm and eggs) and F1 embryos (10 hpf) from all four crosses. Embryos resulting from the BaP male and control female cross had the most differentially expressed genes (DEGs) and differentially methylated regions (DMRs). Some DMRs were associated with genes encoding chromatin modifying enzymes suggesting regulation of chromatin conformation by DNA methylation. Overall, these results suggest that parental dietary BaP exposure significantly contributes to the multigenerational adverse outcomes.
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Affiliation(s)
- Z Pandelides
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, United States of America
| | - M C Sturgis
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, United States of America
| | - C Thornton
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, United States of America
| | - N Aluru
- Biology Department, Woods Hole Oceanographic Institution and Woods Hole Center for Oceans and Human Health, Woods Hole, MA 02543, United States of America
| | - K L Willett
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, United States of America.
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2
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Reid NM, Jackson CE, Gilbert D, Minx P, Montague MJ, Hampton TH, Helfrich LW, King BL, Nacci DE, Aluru N, Karchner SI, Colbourne JK, Hahn ME, Shaw JR, Oleksiak MF, Crawford DL, Warren WC, Whitehead A. The landscape of extreme genomic variation in the highly adaptable Atlantic killifish. Genome Biol Evol 2017; 9:659-676. [PMID: 28201664 PMCID: PMC5381573 DOI: 10.1093/gbe/evx023] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 01/30/2017] [Accepted: 02/04/2017] [Indexed: 12/22/2022] Open
Abstract
Understanding and predicting the fate of populations in changing environments require knowledge about the mechanisms that support phenotypic plasticity and the adaptive value and evolutionary fate of genetic variation within populations. Atlantic killifish (Fundulus heteroclitus) exhibit extensive phenotypic plasticity that supports large population sizes in highly fluctuating estuarine environments. Populations have also evolved diverse local adaptations. To yield insights into the genomic variation that supports their adaptability, we sequenced a reference genome and 48 additional whole genomes from a wild population. Evolution of genes associated with cell cycle regulation and apoptosis is accelerated along the killifish lineage, which is likely tied to adaptations for life in highly variable estuarine environments. Genome-wide standing genetic variation, including nucleotide diversity and copy number variation, is extremely high. The highest diversity genes are those associated with immune function and olfaction, whereas genes under greatest evolutionary constraint are those associated with neurological, developmental, and cytoskeletal functions. Reduced genetic variation is detected for tight junction proteins, which in killifish regulate paracellular permeability that supports their extreme physiological flexibility. Low-diversity genes engage in more regulatory interactions than high-diversity genes, consistent with the influence of pleiotropic constraint on molecular evolution. High genetic variation is crucial for continued persistence of species given the pace of contemporary environmental change. Killifish populations harbor among the highest levels of nucleotide diversity yet reported for a vertebrate species, and thus may serve as a useful model system for studying evolutionary potential in variable and changing environments.
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Affiliation(s)
- Noah M Reid
- Department of Environmental Toxicology, University of California, Davis, CA 95616
| | - Craig E Jackson
- School of Public and Environmental Affairs, Indiana University, Bloomington, IN 47405
| | - Don Gilbert
- Biology Department, Indiana University, Bloomington, IN 47405
| | - Patrick Minx
- McDonnell Genome Institute, Washington University School of Medicine, St Louis, MO 63108
| | - Michael J Montague
- McDonnell Genome Institute, Washington University School of Medicine, St Louis, MO 63108
| | - Thomas H Hampton
- Department of Microbiology and Immunology, Dartmouth College Geisel School of Medicine, Hanover, NH 03755
| | - Lily W Helfrich
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543
| | - Benjamin L King
- Mount Desert Island Biological Laboratory, Salisbury Cove, ME 04672
| | - Diane E Nacci
- US Environmental Protection Agency, Office of Research and Development, Narragansett, RI, 02882
| | - Neel Aluru
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543
| | - Sibel I Karchner
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543
| | - John K Colbourne
- School of Biosciences, University of Birmingham, United Kingdom, B15 2TT
| | - Mark E Hahn
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543
| | - Joseph R Shaw
- School of Public and Environmental Affairs, Indiana University, Bloomington, IN 47405
| | - Marjorie F Oleksiak
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149
| | - Douglas L Crawford
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149
| | - Wesley C Warren
- McDonnell Genome Institute, Washington University School of Medicine, St Louis, MO 63108
| | - Andrew Whitehead
- Department of Environmental Toxicology, University of California, Davis, CA 95616
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Glazer L, Aluru N, Hahn M. Delayed neurobehavioral effects caused by zebrafish embryonic exposure to low levels of PCB-126. Neurotoxicol Teratol 2015. [DOI: 10.1016/j.ntt.2015.04.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wang L, Zhang J, Duan J, Gao X, Zhu W, Lu X, Yang L, Zhang J, Li G, Ci W, Li W, Zhou Q, Aluru N, Tang F, He C, Huang X, Liu J. Programming and inheritance of parental DNA methylomes in mammals. Cell 2014; 157:979-991. [PMID: 24813617 DOI: 10.1016/j.cell.2014.04.017] [Citation(s) in RCA: 376] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 03/26/2014] [Accepted: 04/14/2014] [Indexed: 12/21/2022]
Abstract
The reprogramming of parental methylomes is essential for embryonic development. In mammals, paternal 5-methylcytosines (5mCs) have been proposed to be actively converted to oxidized bases. These paternal oxidized bases and maternal 5mCs are believed to be passively diluted by cell divisions. By generating single-base resolution, allele-specific DNA methylomes from mouse gametes, early embryos, and primordial germ cell (PGC), as well as single-base-resolution maps of oxidized cytosine bases for early embryos, we report the existence of 5hmC and 5fC in both maternal and paternal genomes and find that 5mC or its oxidized derivatives, at the majority of demethylated CpGs, are converted to unmodified cytosines independent of passive dilution from gametes to four-cell embryos. Therefore, we conclude that paternal methylome and at least a significant proportion of maternal methylome go through active demethylation during embryonic development. Additionally, all the known imprinting control regions (ICRs) were classified into germ-line or somatic ICRs.
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Affiliation(s)
- Lu Wang
- CAS Key Laboratory of Genome Sciences and Information, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Zhang
- Model Animal Research Center, Nanjing University, Nanjing 210061, China
| | - Jialei Duan
- CAS Key Laboratory of Genome Sciences and Information, Chinese Academy of Sciences, Beijing 100101, China
| | - Xinxing Gao
- Model Animal Research Center, Nanjing University, Nanjing 210061, China
| | - Wei Zhu
- CAS Key Laboratory of Genome Sciences and Information, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingyu Lu
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL 60637, USA
| | - Lu Yang
- Biodynamic Optical Imaging Center, College of Life Sciences, Peking University, Beijing 100871, China
| | - Jing Zhang
- CAS Key Laboratory of Genome Sciences and Information, Chinese Academy of Sciences, Beijing 100101, China
| | - Guoqiang Li
- CAS Key Laboratory of Genome Sciences and Information, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weimin Ci
- Laboratory of Disease Genomics and Individualized Medicine Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
| | - Wei Li
- Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Qi Zhou
- Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Neel Aluru
- Woods Hole Oceanographic Institution, MA 02543, USA
| | - Fuchou Tang
- Biodynamic Optical Imaging Center, College of Life Sciences, Peking University, Beijing 100871, China
| | - Chuan He
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL 60637, USA
| | - Xingxu Huang
- Model Animal Research Center, Nanjing University, Nanjing 210061, China
| | - Jiang Liu
- CAS Key Laboratory of Genome Sciences and Information, Chinese Academy of Sciences, Beijing 100101, China
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Wang L, Zhang J, Duan J, Gao X, Zhu W, Lu X, Yang L, Zhang J, Li G, Ci W, Li W, Zhou Q, Aluru N, Tang F, He C, Huang X, Liu J. Programming and Inheritance of Parental DNA Methylomes in Mammals. Cell 2014. [DOI: 10.1016/j.cell.2014.05.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Barkataki S, Aluru N, Li M, Vijayan MM, Leatherland JF. Characteristics of ovarian follicle steroidogenesis during vitellogenesis in an asynchronously ovulating stock of rainbow trout Oncorhynchus mykiss. J Fish Biol 2012; 80:741-751. [PMID: 22471796 DOI: 10.1111/j.1095-8649.2012.03217.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study explored several physiological criteria that could be used to assess the steroidogenic condition of the ovarian follicles of individual fish of an asynchronously ovulating captive rainbow trout Oncorhynchus mykiss stock. In these fish, the date of sampling, morphological variables such as gonado-somatic index or ovarian follicle mass and visual assessment of the ovary provided accurate indications of the maturational condition of an individual. The physiological variables measured included the in vitro basal and cyclic adenosine monophosphate (cAMP)-stimulated synthesis by ovarian follicles of 17β-oestradiol (E(2)) and testosterone (T); in addition, quantitative reverse-transcription (RT)-PCR was used to measure the relative expression of star and p450scc genes by ovarian follicles. The ratios of cAMP-stimulated E(2) and T synthesis to basal E(2) and T synthesis provided a reliable indication of differences in the steroidogenic status of the follicles of individual animals. On the basis of these criteria, together with the use of gene expression profiles, it was possible to classify individual fish as being at an early, mid or late-vitellogenic stage.
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Affiliation(s)
- S Barkataki
- Department of Biomedical Sciences, University of Guelph, Guelph, ON, N1G 2W1 Canada
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Shepherd BS, Aluru N, Vijayan MM. Acute handling disturbance modulates plasma insulin-like growth factor binding proteins in rainbow trout (Oncorhynchus mykiss). Domest Anim Endocrinol 2011; 40:129-38. [PMID: 21185680 DOI: 10.1016/j.domaniend.2010.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 09/22/2010] [Accepted: 09/24/2010] [Indexed: 12/30/2022]
Abstract
The effects of acute stressor exposure on proximal (growth hormone [GH]) and distal (insulin-like growth factor-I [IFG-I] and insulin-like growth factor-binding proteins [IFGBPs]) components of the somatotropic axis are poorly understood in finfish. Rainbow trout (Oncorhynchus mykiss) were exposed to a 5-min handling disturbance to mimic an acute stressor episode, and levels of plasma GH, IGF-I, and IGFBPs at 0, 1, 4, and 24 h post-stressor exposure were measured. An unstressed group was also sampled at the same clock times (09:00, 10:00, 13:00, and 08:00 [the following day]) as acute stress sampling to determine temporal changes in the above somatotropic axis components. The acute stressor transiently elevated plasma cortisol and glucose levels at 1 and 4 h post-stressor exposure, whereas no changes were seen in the unstressed group. Plasma GH levels were not affected by handling stress or sampling time in the unstressed animals. Plasma IGF-I levels were significantly depressed at 1 and 4 h post-stressor exposure, but no discernible temporal pattern was seen in the unstressed animals. Using a western ligand blotting technique, we detected plasma IGFBPs of 21, 32, 42, and 50 kDa in size. The plasma levels of the lower-molecular-weight IGFBPs (21 and 32 kDa) were unaffected by handling stressor, nor were there any discernible temporal patterns in the unstressed animals. By contrast, the higher-molecular-weight IGFBPs (42 and 50 kDa) were affected by stress or time of sampling. Levels of the 42-kDa IGFBP levels significantly decreased over the sampling period in unstressed control animals, but this temporal drop was eliminated in stressed animals. Levels of the 50-kDa IGFBPs also decreased significantly over the sampling time in unstressed trout, whereas handling disturbance transiently increased levels of this IGFBP at 1 h but not at 4 and 24 h post-stressor exposure compared with the control group. Overall, our results suggest that acute stress adaptation involves modulation of plasma IGF-1 and high-molecular-mass IGFBP levels (42 and 50 kDa) in rainbow trout.
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Affiliation(s)
- B S Shepherd
- USDA/ARS/Great Lakes WATER Institute, Milwaukee, WI 53204, USA.
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Filipa Gonçalves A, Damasceno-Oliveira A, Aluru N, Vijayan M, Coimbra J, Wilson J. There is a cellular stress in response to hydrostatic pressure (3 MPa) acclimation in the shallow water teleost Oncorhynchus mykiss. Comp Biochem Physiol A Mol Integr Physiol 2008. [DOI: 10.1016/j.cbpa.2008.04.227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Cara JB, Aluru N, Moyano FJ, Vijayan MM. Food-deprivation induces HSP70 and HSP90 protein expression in larval gilthead sea bream and rainbow trout. Comp Biochem Physiol B Biochem Mol Biol 2005; 142:426-31. [PMID: 16257553 DOI: 10.1016/j.cbpb.2005.09.005] [Citation(s) in RCA: 136] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2005] [Revised: 09/12/2005] [Accepted: 09/14/2005] [Indexed: 10/25/2022]
Abstract
Heat shock proteins (HSPs) expression is commonly used as indicators of cellular stress in animals. However, very little is known about either the expression patterns of HSPs or their role in the stress-tolerance phenomenon in early life stages of fish. To this end, we examined the impact of food-deprivation (12 h), reduced oxygen levels (3.5 mg/L for 1 h) and heat shock (HS: +5 degrees C for 1 h) on HSP70 and HSP90 protein expression in early life stages of the gilthead sea bream (Sparus aurata), a warm-water aquaculture species. Also, we investigated HSP70 and HSP90 response to food-deprivation (7 days) in early life stages of rainbow trout (Oncorhynchus mykiss), a cool-water aquaculture species, and the tolerance of this larvae to heat shock (either +5 or +10 degrees C for 1 h). Our results clearly demonstrate that food-deprivation enhances HSP70 and HSP90 protein expression in larvae of both species. In gilthead sea bream larvae, the stressors-induced HSP70 and HSP90 (only in the reduced oxygen group) protein expression returned to unstressed levels after 24 h recovery. In fed trout larvae, a +5 degrees C heat shock did not elevate HSP70 and HSP90 expression, whereas 100% mortality was evident with a +10 degrees C HS. However, food-deprived trout larvae, which had higher HSP70 and HSP90 protein content, survived HS and showed HS-dependent increases in HSP70, but not HSP90 expression. Overall, HSP70 and HSP90 protein expression in early life stages of fish have the potential to be used as markers of nutritional stress, while elevation of the tissue HSPs content may be used as a means to increase stress tolerance during larval rearing.
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Affiliation(s)
- J B Cara
- Dpto. Biología Aplicada. E.P.S., Univ. Almería, Spain
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Jørgensen EH, Vijayan MM, Aluru N, Maule AG. Fasting modifies Aroclor 1254 impact on plasma cortisol, glucose and lactate responses to a handling disturbance in Arctic charr. Comp Biochem Physiol C Toxicol Pharmacol 2002; 132:235-45. [PMID: 12106900 DOI: 10.1016/s1532-0456(02)00069-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Integrated effects of polychlorinated biphenyl (PCB) and nutritional status on responses to handling disturbance were investigated in the Arctic charr (Salvelinus alpinus). The fish were orally contaminated with Aroclor 1254 and held either with or without food for 5 months before they were subjected to a 10-min handling disturbance. Food-deprived fish were given 0, 1, 10 or 100 mg PCB kg(-1) and the fed fish 0 or 100 mg PCB kg(-1). Plasma cortisol, glucose and lactate levels were measured at 0 (pre-handling), 1, 3, 6 and 23 h after the handling disturbance. Food-deprived control fish had elevated plasma cortisol levels compared with fed fish before handling. These basal cortisol levels were suppressed by PCB in food-deprived fish, and elevated by PCB in fed fish. The immediate cortisol and glucose responses to handling disturbance were suppressed by PCB in a dose-dependent way in food-deprived fish. Although these responses were also lowered by PCB in the fed fish, the effect was much less pronounced than in food-deprived fish. There were only minor effects on plasma lactate responses. Our findings suggest that the stress responses of the Arctic charr are compromised by PCB and that the long-term fasting, typical of high-latitude fish, makes these species particularly sensitive to organochlorines such as PCB.
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Affiliation(s)
- E H Jørgensen
- Norwegian Institute for Nature Research, the Polar Environmental Centre, N-9296 Tromsø, Norway.
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