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Li X, Song S, Wei F, Huang X, Guo Y, Zhang T. Occurrence, distribution, and translocation of legacy and current-use pesticides in pomelo orchards in South China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169674. [PMID: 38160827 DOI: 10.1016/j.scitotenv.2023.169674] [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: 10/24/2023] [Revised: 12/23/2023] [Accepted: 12/23/2023] [Indexed: 01/03/2024]
Abstract
Pomelo (Citrus grandis) is a highly popular and juicy member of the citrus family. However, little is known regarding the occurrence and distribution of pesticides in pomelo. In this study, we determined the levels of legacy (n = 25) and current-use pesticides (n = 2) in all parts of pomelo (i.e., epicarp, mesocarp, endocarp, pulp, and seed) and paired soil and leaf samples collected from two pomelo orchards in South China. At least one target pesticide was detected in the pomelo fruit, soil, and leaf samples, indicating that these pesticides were ubiquitous. The spatial distribution of the total concentration of pesticides in the pomelo parts was in the order of epicarp (216 ng/g) > mesocarp (9.50 ng/g) > endocarp (4.40 ng/g) > seed (3.80 ng/g) > pulp (1.10 ng/g), revealing different spatial distributions in pomelo. Principal component analysis was performed based on the concentrations of the target pesticides in the pulp and paired samples of epicarp, leaf, topsoil, and deep soil to examine the translocation pathway of the pesticides in pomelo. Close correlations were found among the target pesticides, and the pesticides in the pulp were mainly transferred from the epicarp, topsoil, or deep soil. We also explored the factors that affected such transport and found that the main translocation pathway of the non-systemic pesticide (i.e., buprofezin) into the pulp was the epicarp, whereas the systemic pesticide (i.e., pyriproxyfen) was mainly derived from the soil. The cumulative chronic dietary risks of all the pesticides resulting from pomelo consumption were much lower than the acceptable daily intake values for the general population. However, the prolonged risk of exposure to these pesticides should not be underestimated. The potential health risks posed by legacy and current-use pesticides, which are widely and frequently utilized, should be given increased attention.
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Affiliation(s)
- Xu Li
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China; School of Chemistry and Environment, Jiaying University, Meizhou 514015, China
| | - Shiming Song
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China; School of Chemistry and Environment, Jiaying University, Meizhou 514015, China
| | - Fenghua Wei
- School of Chemistry and Environment, Jiaying University, Meizhou 514015, China
| | - Xiongfei Huang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Yuankai Guo
- School of Chemistry and Environment, Jiaying University, Meizhou 514015, China.
| | - Tao Zhang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
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2
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Ulschmid CM, Sun MR, Jabbarpour CR, Steward AC, Rivera-González KS, Cao J, Martin AA, Barnes M, Wicklund L, Madrid A, Papale LA, Joseph DB, Vezina CM, Alisch RS, Lipinski RJ. Disruption of DNA methylation-mediated cranial neural crest proliferation and differentiation causes orofacial clefts in mice. Proc Natl Acad Sci U S A 2024; 121:e2317668121. [PMID: 38194455 PMCID: PMC10801837 DOI: 10.1073/pnas.2317668121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/14/2023] [Indexed: 01/11/2024] Open
Abstract
Orofacial clefts of the lip and palate are widely recognized to result from complex gene-environment interactions, but inadequate understanding of environmental risk factors has stymied development of prevention strategies. We interrogated the role of DNA methylation, an environmentally malleable epigenetic mechanism, in orofacial development. Expression of the key DNA methyltransferase enzyme DNMT1 was detected throughout palate morphogenesis in the epithelium and underlying cranial neural crest cell (cNCC) mesenchyme, a highly proliferative multipotent stem cell population that forms orofacial connective tissue. Genetic and pharmacologic manipulations of DNMT activity were then applied to define the tissue- and timing-dependent requirement of DNA methylation in orofacial development. cNCC-specific Dnmt1 inactivation targeting initial palate outgrowth resulted in OFCs, while later targeting during palatal shelf elevation and elongation did not. Conditional Dnmt1 deletion reduced cNCC proliferation and subsequent differentiation trajectory, resulting in attenuated outgrowth of the palatal shelves and altered development of cNCC-derived skeletal elements. Finally, we found that the cellular mechanisms of cleft pathogenesis observed in vivo can be recapitulated by pharmacologically reducing DNA methylation in multipotent cNCCs cultured in vitro. These findings demonstrate that DNA methylation is a crucial epigenetic regulator of cNCC biology, define a critical period of development in which its disruption directly causes OFCs, and provide opportunities to identify environmental influences that contribute to OFC risk.
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Affiliation(s)
- Caden M. Ulschmid
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Miranda R. Sun
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Christopher R. Jabbarpour
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Austin C. Steward
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Kenneth S. Rivera-González
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
- Molecular and Environmental Toxicology Training Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI53706
| | - Jocelyn Cao
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Alexander A. Martin
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Macy Barnes
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Lorena Wicklund
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Andy Madrid
- Neurological Surgery, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI53706
| | - Ligia A. Papale
- Neurological Surgery, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI53706
| | - Diya B. Joseph
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
| | - Chad M. Vezina
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
- Molecular and Environmental Toxicology Training Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI53706
| | - Reid S. Alisch
- Neurological Surgery, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI53706
| | - Robert J. Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI53706
- Molecular and Environmental Toxicology Training Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI53706
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3
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Jenkins AE, Scarlett CO, Beames TG, Rivera-González KS, Martin AA, Sun MR, Hutson PR, Lipinski RJ. Pharmacokinetic analysis of acute and dietary exposure to piperonyl butoxide in the mouse. Toxicol Rep 2023; 11:310-317. [PMID: 37789951 PMCID: PMC10543969 DOI: 10.1016/j.toxrep.2023.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/05/2023] Open
Abstract
Piperonyl butoxide (PBO) is a popular insecticide synergist present in thousands of commercial, agricultural, and household products. PBO inhibits cytochrome P450 activity, impairing the ability of insects to detoxify insecticides. PBO was recently discovered to also inhibit Sonic hedgehog signaling, a pathway required for embryonic development, and rodent studies have demonstrated the potential for in utero PBO exposure to cause structural malformations of the brain, face, and limbs, or more subtle neurodevelopmental abnormalities. The current understanding of the pharmacokinetics of PBO in mice is limited, particularly with respect to dosing paradigms associated with developmental toxicity. To establish a pharmacokinetic (PK) model for oral exposure, PBO was administered to female C57BL/6J mice acutely by oral gavage (22-1800 mg/kg) or via diet (0.09 % PBO in chow). Serum and adipose samples were collected, and PBO concentrations were determined by HPLC-MS/MS. The serum concentrations of PBO were best fit by a linear one-compartment model. PBO concentrations in visceral adipose tissue greatly exceeded those in serum. PBO concentrations in both serum and adipose tissue decreased quickly after cessation of dietary exposure. The elimination half-life of PBO in the mouse after gavage dosing was 6.5 h (90 % CI 4.7-9.5 h), and systemic oral clearance was 83.3 ± 20.5 mL/h. The bioavailability of PBO in chow was 41 % that of PBO delivered in olive oil by gavage. Establishment of this PK model provides a foundation for relating PBO concentrations that cause developmental toxicity in the rodent models to Sonic hedgehog signaling pathway inhibition.
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Affiliation(s)
- Alyssa E. Jenkins
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | | | - Tyler G. Beames
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Kenneth S. Rivera-González
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Alexander A. Martin
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Miranda R. Sun
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Paul R. Hutson
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Robert J. Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
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4
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Robinson K, Mosley TJ, Rivera-González KS, Jabbarpour CR, Curtis SW, Adeyemo WL, Beaty TH, Butali A, Buxó CJ, Cutler DJ, Epstein MP, Gowans LJ, Hecht JT, Murray JC, Shaw GM, Uribe LM, Weinberg SM, Brand H, Marazita ML, Lipinski RJ, Leslie EJ. Trio-based GWAS identifies novel associations and subtype-specific risk factors for cleft palate. HGG ADVANCES 2023; 4:100234. [PMID: 37719664 PMCID: PMC10502411 DOI: 10.1016/j.xhgg.2023.100234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 08/18/2023] [Indexed: 09/19/2023] Open
Abstract
Cleft palate (CP) is one of the most common craniofacial birth defects; however, there are relatively few established genetic risk factors associated with its occurrence despite high heritability. Historically, CP has been studied as a single phenotype, although it manifests across a spectrum of defects involving the hard and/or soft palate. We performed a genome-wide association study using transmission disequilibrium tests of 435 case-parent trios to evaluate broad risks for any cleft palate (ACP) (n = 435), and subtype-specific risks for any cleft soft palate (CSP), (n = 259) and any cleft hard palate (CHP) (n = 125). We identified a single genome-wide significant locus at 9q33.3 (lead SNP rs7035976, p = 4.24 × 10-8) associated with CHP. One gene at this locus, angiopoietin-like 2 (ANGPTL2), plays a role in osteoblast differentiation. It is expressed both in craniofacial tissue of human embryos and developing mouse palatal shelves. We found 19 additional loci reaching suggestive significance (p < 5 × 10-6), of which only one overlapped between groups (chromosome 17q24.2, ACP and CSP). Odds ratios for the 20 loci were most similar across all 3 groups for SNPs associated with the ACP group, but more distinct when comparing SNPs associated with either subtype. We also found nominal evidence of replication (p < 0.05) for 22 SNPs previously associated with orofacial clefts. Our study to evaluate CP risks in the context of its subtypes and we provide newly reported associations affecting the broad risk for CP as well as evidence of subtype-specific risks.
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Affiliation(s)
- Kelsey Robinson
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | - Trenell J. Mosley
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | - Kenneth S. Rivera-González
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Christopher R. Jabbarpour
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Sarah W. Curtis
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | - Wasiu Lanre Adeyemo
- Department of Oral and Maxillofacial Surgery, College of Medicine, University of Lagos, Lagos 101017, Nigeria
| | - Terri H. Beaty
- Department of Epidemiology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Azeez Butali
- Department of Oral Biology, Radiology, and Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Carmen J. Buxó
- School of Dental Medicine, University of Puerto Rico, San Juan, PR 00925, USA
| | - David J. Cutler
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | | | - Lord J.J. Gowans
- Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Jacqueline T. Hecht
- Department of Pediatrics, McGovern Medical School University of Texas Health at Houston, Houston, TX 77030, USA
| | - Jeffrey C. Murray
- Department of Pediatrics, University of Iowa, Iowa City, IA 52242, USA
| | - Gary M. Shaw
- Department of Pediatrics, Stanford University, Stanford, CA 94305, USA
| | - Lina Moreno Uribe
- Department of Orthodontics & The Iowa Institute for Oral Health Research, University of Iowa, Iowa City, IA 52242, USA
| | - Seth M. Weinberg
- Center for Craniofacial and Dental Genetics, Department of Oral and Craniofacial Sciences, School of Dental Medicine, and Department of Human Genetics, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Harrison Brand
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Mary L. Marazita
- Center for Craniofacial and Dental Genetics, Department of Oral and Craniofacial Sciences, School of Dental Medicine, and Department of Human Genetics, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Robert J. Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
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5
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Robinson K, Mosley TJ, Rivera-González KS, Jabbarpour CR, Curtis SW, Adeyemo WL, Beaty TH, Butali A, Buxó CJ, Cutler DJ, Epstein MP, Gowans LJ, Hecht JT, Murray JC, Shaw GM, Uribe LM, Weinberg SM, Brand H, Marazita ML, Lipinski RJ, Leslie EJ. Trio-based GWAS identifies novel associations and subtype-specific risk factors for cleft palate. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.03.01.23286642. [PMID: 37066311 PMCID: PMC10104215 DOI: 10.1101/2023.03.01.23286642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Orofacial clefts (OFCs) are the most common craniofacial birth defects and are often categorized into two etiologically distinct groups: cleft lip with or without cleft palate (CL/P) and isolated cleft palate (CP). CP is highly heritable, but there are still relatively few established genetic risk factors associated with its occurrence compared to CL/P. Historically, CP has been studied as a single phenotype despite manifesting across a spectrum of defects involving the hard and/or soft palate. We performed GWAS using transmission disequilibrium tests using 435 case-parent trios to evaluate broad risks for any cleft palate (ACP, n=435), as well as subtype-specific risks for any cleft soft palate (CSP, n=259) and any cleft hard palate (CHP, n=125). We identified a single genome-wide significant locus at 9q33.3 (lead SNP rs7035976, p=4.24×10 -8 ) associated with CHP. One gene at this locus, angiopoietin-like 2 ( ANGPTL2 ), plays a role in osteoblast differentiation. It is expressed in craniofacial tissue of human embryos, as well as in the developing mouse palatal shelves. We found 19 additional loci reaching suggestive significance (p<5×10 -6 ), of which only one overlapped between groups (chromosome 17q24.2, ACP and CSP). Odds ratios (ORs) for each of the 20 loci were most similar across all three groups for SNPs associated with the ACP group, but more distinct when comparing SNPs associated with either the CSP or CHP groups. We also found nominal evidence of replication (p<0.05) for 22 SNPs previously associated with cleft palate (including CL/P). Interestingly, most SNPs associated with CL/P cases were found to convey the opposite effect in those replicated in our dataset for CP only. Ours is the first study to evaluate CP risks in the context of its subtypes and we provide newly reported associations affecting the broad risk for CP as well as evidence of subtype-specific risks.
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Affiliation(s)
| | - Trenell J Mosley
- Department of Human Genetics, Emory University, Atlanta, GA
- Current address: Chief Officer for Scientific Workforce Diversity Office, National Institutes of Health, Bethesda, MD
| | - Kenneth S Rivera-González
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI
| | - Christopher R Jabbarpour
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI
| | - Sarah W Curtis
- Department of Human Genetics, Emory University, Atlanta, GA
| | - Wasiu Lanre Adeyemo
- Department of Oral and Maxillofacial Surgery, College of Medicine, University of Lagos, Lagos, Nigeria
| | - Terri H Beaty
- Department of Epidemiology, Johns Hopkins University, Baltimore, MD
| | - Azeez Butali
- Department of Oral Biology, Radiology, and Medicine, University of Iowa, Iowa City, IA
| | - Carmen J Buxó
- School of Dental Medicine, University of Puerto Rico, San Juan, Puerto Rico
| | - David J Cutler
- Department of Human Genetics, Emory University, Atlanta, GA
| | | | - Lord Jj Gowans
- Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Jacqueline T Hecht
- Department of Pediatrics, McGovern Medical School University of Texas Health at Houston, Houston, TX
| | | | - Gary M Shaw
- Department of Pediatrics, Stanford University, Stanford, CA
| | - Lina Moreno Uribe
- Department of Orthodontics & The Iowa Institute for Oral Health Research, University of Iowa, Iowa City, IA, USA
| | - Seth M Weinberg
- Center for Craniofacial and Dental Genetics, Department of Oral and Craniofacial Sciences, School of Dental Medicine, and Department of Human Genetics, School of Public Health, University of Pittsburgh, Pittsburgh, PA
| | - Harrison Brand
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA
| | - Mary L Marazita
- Center for Craniofacial and Dental Genetics, Department of Oral and Craniofacial Sciences, School of Dental Medicine, and Department of Human Genetics, School of Public Health, University of Pittsburgh, Pittsburgh, PA
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI
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6
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Everson JL, Tseng YC, Eberhart JK. High-throughput detection of craniofacial defects in fluorescent zebrafish. Birth Defects Res 2023; 115:371-389. [PMID: 36369674 PMCID: PMC9898129 DOI: 10.1002/bdr2.2127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 10/20/2022] [Accepted: 10/28/2022] [Indexed: 11/14/2022]
Abstract
Losses and malformations of cranial neural crest cell (cNCC) derivatives are a hallmark of several common brain and face malformations. Nevertheless, the etiology of these cNCC defects remains unknown for many cases, suggesting a complex basis involving interactions between genetic and/or environmental factors. However, the sheer number of possible factors (thousands of genes and hundreds of thousands of toxicants) has hindered identification of specific interactions. Here, we develop a high-throughput analysis that will enable faster identification of multifactorial interactions in the genesis of craniofacial defects. Zebrafish embryos expressing a fluorescent marker of cNCCs (fli1:EGFP) were exposed to a pathway inhibitor standard or environmental toxicant, and resulting changes in fluorescence were measured in high-throughput using a fluorescent microplate reader to approximate cNCC losses. Embryos exposed to the environmental Hedgehog pathway inhibitor piperonyl butoxide (PBO), a Hedgehog pathway inhibitor standard, or alcohol (ethanol) exhibited reduced fli1:EGFP fluorescence at one day post fertilization, which corresponded with craniofacial defects at five days post fertilization. Combining PBO and alcohol in a co-exposure paradigm synergistically reduced fluorescence, demonstrating a multifactorial interaction. Using pathway reporter transgenics, we show that the plate reader assay is sensitive at detecting alterations in Hedgehog signaling, a critical regulator of craniofacial development. We go on to demonstrate that this technique readily detects defects in other important cell types, namely neurons. Together, these findings demonstrate this novel in vivo platform can predict developmental abnormalities and multifactorial interactions in high-throughput.
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Affiliation(s)
- Joshua L. Everson
- Department of Molecular Biosciences, School of Natural Sciences, University of Texas at Austin, Austin, Texas, USA,Waggoner Center for Alcohol and Addiction Research, School of Pharmacy, University of Texas at Austin, Austin, Texas, USA
| | - Yung-Chia Tseng
- Department of Molecular Biosciences, School of Natural Sciences, University of Texas at Austin, Austin, Texas, USA
| | - Johann K. Eberhart
- Department of Molecular Biosciences, School of Natural Sciences, University of Texas at Austin, Austin, Texas, USA,Waggoner Center for Alcohol and Addiction Research, School of Pharmacy, University of Texas at Austin, Austin, Texas, USA
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7
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Lipinski RJ, Krauss RS. Gene-environment interactions in birth defect etiology: Challenges and opportunities. Curr Top Dev Biol 2023; 152:1-30. [PMID: 36707208 PMCID: PMC9942595 DOI: 10.1016/bs.ctdb.2022.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Birth defects are relatively common congenital outcomes that significantly impact affected individuals, their families, and communities. Effective development and deployment of prevention and therapeutic strategies for these conditions requires sufficient understanding of etiology, including underlying genetic and environmental causes. Tremendous progress has been made in defining the genetic basis of familial and syndromic forms of birth defects. However, the majority of birth defect cases are considered nonsyndromic and thought to result from multifactorial gene-environment interactions. While substantial advances have been made in elucidating the genetic landscape of these etiologically complex conditions, significant biological and technical constraints have stymied progress toward a refined knowledge of environmental risk factors. Defining specific gene-environment interactions in birth defect etiology is even more challenging. However, progress has been made, including demonstration of critical proofs of concept and development of new conceptual and technical approaches for resolving complex gene-environment interactions. In this review, we discuss current views of multifactorial birth defect etiology, comparing them with other diseases that also involve gene-environment interactions, including primary immunodeficiency and cancer. We describe how various model systems have illuminated mechanisms of multifactorial etiology and these models' individual strengths and weaknesses. Finally, suggestions for areas of future emphasis are proposed.
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Affiliation(s)
- Robert J. Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, United States,Corresponding authors: ;
| | - Robert S. Krauss
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, United States,Corresponding authors: ;
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8
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Everson JL, Eberhart JK. Gene-alcohol interactions in birth defects. Curr Top Dev Biol 2022; 152:77-113. [PMID: 36707215 PMCID: PMC9897481 DOI: 10.1016/bs.ctdb.2022.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Most human birth defects are thought to result from complex interactions between combinations of genetic and environmental factors. This is true even for conditions that, at face value, may appear simple and straightforward, like fetal alcohol spectrum disorders (FASD). FASD describe the full range of structural and neurological disruptions that result from prenatal alcohol exposure. While FASD require alcohol exposure, evidence from human and animal model studies demonstrate that additional genetic and/or environmental factors can influence the embryo's susceptibility to alcohol. Only a limited number of alcohol interactions in birth defects have been identified, with many sensitizing genetic and environmental factors likely yet to be identified. Because of this, while unsatisfying, there is no definitively "safe" dose of alcohol for all pregnancies. Determining these other factors, as well as mechanistically characterizing known interactions, is critical for better understanding and preventing FASD and requires combined scrutiny of human and model organism studies.
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Affiliation(s)
- Joshua L Everson
- Department of Molecular Biosciences, School of Natural Sciences, University of Texas at Austin, Austin, TX, United States; Waggoner Center for Alcohol and Addiction Research, School of Pharmacy, University of Texas at Austin, Austin, TX, United States.
| | - Johann K Eberhart
- Department of Molecular Biosciences, School of Natural Sciences, University of Texas at Austin, Austin, TX, United States; Waggoner Center for Alcohol and Addiction Research, School of Pharmacy, University of Texas at Austin, Austin, TX, United States.
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9
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Brain Organization and Human Diseases. Cells 2022; 11:cells11101642. [PMID: 35626679 PMCID: PMC9139716 DOI: 10.3390/cells11101642] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/09/2022] [Accepted: 05/12/2022] [Indexed: 02/06/2023] Open
Abstract
The cortex is a highly organized structure that develops from the caudal regions of the segmented neural tube. Its spatial organization sets the stage for future functional arealization. Here, we suggest using a developmental perspective to describe and understand the etiology of common cortical malformations and their manifestation in the human brain.
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10
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Nishimura Y, Kurosawa K. Analysis of Gene-Environment Interactions Related to Developmental Disorders. Front Pharmacol 2022; 13:863664. [PMID: 35370658 PMCID: PMC8969575 DOI: 10.3389/fphar.2022.863664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 03/03/2022] [Indexed: 11/21/2022] Open
Abstract
Various genetic and environmental factors are associated with developmental disorders (DDs). It has been suggested that interaction between genetic and environmental factors (G × E) is involved in the etiology of DDs. There are two major approaches to analyze the interaction: genome-wide and candidate gene-based approaches. In this mini-review, we demonstrate how these approaches can be applied to reveal the G × E related to DDs focusing on zebrafish and mouse models. We also discuss novel approaches to analyze the G × E associated with DDs.
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Affiliation(s)
- Yuhei Nishimura
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Kenji Kurosawa
- Division of Medical Genetics, Kanagawa Children’s Medical Center, Yokohama, Japan
- Department of Clinical Dysmorphology, Mie University Graduate School of Medicine, Tsu, Japan
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11
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Rivera-González KS, Beames TG, Lipinski RJ. Response to Osimitz and Droege, 2021. CHEMOSPHERE 2022; 288:132598. [PMID: 34666071 PMCID: PMC8688311 DOI: 10.1016/j.chemosphere.2021.132598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Affiliation(s)
- Kenneth S Rivera-González
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, 53706, USA; Molecular and Environmental Toxicology Graduate Training Program, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Tyler G Beames
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, 53706, USA; Molecular and Environmental Toxicology Graduate Training Program, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, 53706, USA; Molecular and Environmental Toxicology Graduate Training Program, University of Wisconsin-Madison, Madison, WI, 53706, USA.
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12
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Lo HF, Hong M, Krauss RS. Concepts in Multifactorial Etiology of Developmental Disorders: Gene-Gene and Gene-Environment Interactions in Holoprosencephaly. Front Cell Dev Biol 2022; 9:795194. [PMID: 35004690 PMCID: PMC8727999 DOI: 10.3389/fcell.2021.795194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/29/2021] [Indexed: 12/17/2022] Open
Abstract
Many common developmental disorders are thought to arise from a complex set of genetic and environmental risk factors. These factors interact with each other to affect the strength and duration of key developmental signaling pathways, thereby increasing the possibility that they fail to achieve the thresholds required for normal embryonic patterning. One such disorder, holoprosencephaly (HPE), serves as a useful model system in understanding various forms of multifactorial etiology. Genomic analysis of HPE cases, epidemiology, and mechanistic studies of animal models have illuminated multiple potential ways that risk factors interact to produce adverse developmental outcomes. Among these are: 1) interactions between driver and modifier genes; 2) oligogenic inheritance, wherein each parent provides predisposing variants in one or multiple distinct loci; 3) interactions between genetic susceptibilities and environmental risk factors that may be insufficient on their own; and 4) interactions of multiple genetic variants with multiple non-genetic risk factors. These studies combine to provide concepts that illuminate HPE and are also applicable to additional disorders with complex etiology, including neural tube defects, congenital heart defects, and oro-facial clefting.
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Affiliation(s)
- Hsiao-Fan Lo
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Mingi Hong
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Robert S Krauss
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, United States
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13
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Kong JH, Young CB, Pusapati GV, Espinoza FH, Patel CB, Beckert F, Ho S, Patel BB, Gabriel GC, Aravind L, Bazan JF, Gunn TM, Lo CW, Rohatgi R. Gene-teratogen interactions influence the penetrance of birth defects by altering Hedgehog signaling strength. Development 2021; 148:dev199867. [PMID: 34486668 PMCID: PMC8513608 DOI: 10.1242/dev.199867] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 08/27/2021] [Indexed: 12/29/2022]
Abstract
Birth defects result from interactions between genetic and environmental factors, but the mechanisms remain poorly understood. We find that mutations and teratogens interact in predictable ways to cause birth defects by changing target cell sensitivity to Hedgehog (Hh) ligands. These interactions converge on a membrane protein complex, the MMM complex, that promotes degradation of the Hh transducer Smoothened (SMO). Deficiency of the MMM component MOSMO results in elevated SMO and increased Hh signaling, causing multiple birth defects. In utero exposure to a teratogen that directly inhibits SMO reduces the penetrance and expressivity of birth defects in Mosmo-/- embryos. Additionally, tissues that develop normally in Mosmo-/- embryos are refractory to the teratogen. Thus, changes in the abundance of the protein target of a teratogen can change birth defect outcomes by quantitative shifts in Hh signaling. Consequently, small molecules that re-calibrate signaling strength could be harnessed to rescue structural birth defects.
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Affiliation(s)
- Jennifer H. Kong
- Departments of Biochemistry and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Cullen B. Young
- Department of Developmental Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15201, USA
| | - Ganesh V. Pusapati
- Departments of Biochemistry and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - F. Hernán Espinoza
- Departments of Biochemistry and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Chandni B. Patel
- Departments of Biochemistry and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Francis Beckert
- Departments of Biochemistry and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Sebastian Ho
- Department of Developmental Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15201, USA
| | - Bhaven B. Patel
- Departments of Biochemistry and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - George C. Gabriel
- Department of Developmental Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15201, USA
| | - L. Aravind
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA
| | | | - Teresa M. Gunn
- McLaughlin Research Institute, Great Falls, MT 59405, USA
| | - Cecilia W. Lo
- Department of Developmental Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15201, USA
| | - Rajat Rohatgi
- Departments of Biochemistry and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
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14
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Swartz ME, Lovely CB, Eberhart JK. Variation in phenotypes from a Bmp-Gata3 genetic pathway is modulated by Shh signaling. PLoS Genet 2021; 17:e1009579. [PMID: 34033651 PMCID: PMC8184005 DOI: 10.1371/journal.pgen.1009579] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 06/07/2021] [Accepted: 05/04/2021] [Indexed: 11/19/2022] Open
Abstract
We sought to understand how perturbation of signaling pathways and their targets generates variable phenotypes. In humans, GATA3 associates with highly variable defects, such as HDR syndrome, microsomia and choanal atresia. We previously characterized a zebrafish point mutation in gata3 with highly variable craniofacial defects to the posterior palate. This variability could be due to residual Gata3 function, however, we observe the same phenotypic variability in gata3 null mutants. Using hsp:GATA3-GFP transgenics, we demonstrate that Gata3 function is required between 24 and 30 hpf. At this time maxillary neural crest cells fated to generate the palate express gata3. Transplantation experiments show that neural crest cells require Gata3 function for palatal development. Via a candidate approach, we determined if Bmp signaling was upstream of gata3 and if this pathway explained the mutant's phenotypic variation. Using BRE:d2EGFP transgenics, we demonstrate that maxillary neural crest cells are Bmp responsive by 24 hpf. We find that gata3 expression in maxillary neural crest requires Bmp signaling and that blocking Bmp signaling, in hsp:DN-Bmpr1a-GFP embryos, can phenocopy gata3 mutants. Palatal defects are rescued in hsp:DN-Bmpr1a-GFP;hsp:GATA3-GFP double transgenic embryos, collectively demonstrating that gata3 is downstream of Bmp signaling. However, Bmp attenuation does not alter phenotypic variability in gata3 loss-of-function embryos, implicating a different pathway. Due to phenotypes observed in hypomorphic shha mutants, the Sonic Hedgehog (Shh) pathway was a promising candidate for this pathway. Small molecule activators and inhibitors of the Shh pathway lessen and exacerbate, respectively, the phenotypic severity of gata3 mutants. Importantly, inhibition of Shh can cause gata3 haploinsufficiency, as observed in humans. We find that gata3 mutants in a less expressive genetic background have a compensatory upregulation of Shh signaling. These results demonstrate that the level of Shh signaling can modulate the phenotypes observed in gata3 mutants.
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Affiliation(s)
- Mary E. Swartz
- Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, United States of America
| | - C. Ben Lovely
- Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, United States of America
| | - Johann K. Eberhart
- Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, United States of America
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15
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Wegner KA, Ruetten H, Girardi NM, O’Driscoll CA, Sandhu JK, Turco AE, Abler LL, Wang P, Wang Z, Bjorling DE, Malinowski R, Peterson RE, Strand DW, Marker PC, Vezina CM. Genetic background but not prostatic epithelial beta-catenin influences susceptibility of male mice to testosterone and estradiol-induced urinary dysfunction. AMERICAN JOURNAL OF CLINICAL AND EXPERIMENTAL UROLOGY 2021; 9:121-131. [PMID: 33816700 PMCID: PMC8012832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Urinary voiding dysfunction in aging men can cause bothersome symptoms and irreparable tissue damage. Underlying mechanisms are not fully known. We previously demonstrated that subcutaneous, slow-release testosterone and estradiol implants (T+E2) drive a pattern of urinary voiding dysfunction in male mice that resembles that of aging men. The initial goal of this study was to test the hypothesis that prostatic epithelial beta-catenin (Ctnnb1) is required for T+E2-mediated voiding dysfunction. Targeted Ctnnb1 deletion did not significantly change voiding function in control or T+E2 treated mice but led to the surprising discovery that the C57BL/6J × FVB/NJ × 129S1 mixed genetic background onto which Ctnnb1 loss of function alleles were maintained is profoundly susceptible to voiding dysfunction. The mixed background mice develop a more rapid T+E2-mediated increase in spontaneous urine spotting, are more impaired in ability to initiate bladder contraction, and develop larger and heavier bladders than T+E2 treated C57BL/6J pure bred mice. To better understand mechanisms, we separately evaluated contributions of T and E2 and found that E2 mediates voiding dysfunction. Our findings that genetic factors serve as modifiers of responsiveness to T and E2 demonstrate the need to control for genetic background in studies of male voiding dysfunction. We also show that genetic factors could control severity of voiding dysfunction. We demonstrate the importance of E2 as a key mediator of voiding impairment, and show that the concentration of E2 in subcutaneous implants determines the severity of voiding dysfunction in mice, demonstrating that the mouse model is tunable, a factor which is important for future pharmacological intervention studies.
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Affiliation(s)
- Kyle A Wegner
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
- Molecular and Environmental Toxicology Center, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Hannah Ruetten
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Nicholas M Girardi
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Chelsea A O’Driscoll
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Jaskiran K Sandhu
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Anne E Turco
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
- Molecular and Environmental Toxicology Center, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Lisa L Abler
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Peiqing Wang
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Zunyi Wang
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Dale E Bjorling
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
| | - Rita Malinowski
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Pharmacy, University of Wisconsin-MadisonMadison, WI, USA
| | | | - Douglas W Strand
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- Department of Urology, University of Texas Southwestern Medical CenterDallas, Texas, USA
| | - Paul C Marker
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Pharmacy, University of Wisconsin-MadisonMadison, WI, USA
| | - Chad M Vezina
- University of Wisconsin-Madison/UMASS Boston/UT-Southwestern George M. O’Brien Center for Benign Urologic ResearchMadison, Wisconsin 53706, USA
- School of Veterinary Medicine, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
- Molecular and Environmental Toxicology Center, University of Wisconsin-MadisonMadison, Wisconsin 53706, USA
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16
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Johnson BP, Vitek RA, Morgan MM, Fink DM, Beames TG, Geiger PG, Beebe DJ, Lipinski RJ. A Microphysiological Approach to Evaluate Effectors of Intercellular Hedgehog Signaling in Development. Front Cell Dev Biol 2021; 9:621442. [PMID: 33634122 PMCID: PMC7900501 DOI: 10.3389/fcell.2021.621442] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 01/08/2021] [Indexed: 12/14/2022] Open
Abstract
Paracrine signaling in the tissue microenvironment is a central mediator of morphogenesis, and modeling this dynamic intercellular activity in vitro is critical to understanding normal and abnormal development. For example, Sonic Hedgehog (Shh) signaling is a conserved mechanism involved in multiple developmental processes and strongly linked to human birth defects including orofacial clefts of the lip and palate. SHH ligand produced, processed, and secreted from the epithelial ectoderm is shuttled through the extracellular matrix where it binds mesenchymal receptors, establishing a gradient of transcriptional response that drives orofacial morphogenesis. In humans, complex interactions of genetic predispositions and environmental insults acting on diverse molecular targets are thought to underlie orofacial cleft etiology. Consequently, there is a need for tractable in vitro approaches that model this complex cellular and environmental interplay and are sensitive to disruption across the multistep signaling cascade. We developed a microplate-based device that supports an epithelium directly overlaid onto an extracellular matrix-embedded mesenchyme, mimicking the basic tissue architecture of developing orofacial tissues. SHH ligand produced from the epithelium generated a gradient of SHH-driven transcription in the adjacent mesenchyme, recapitulating the gradient of pathway activity observed in vivo. Shh pathway activation was antagonized by small molecule inhibitors of epithelial secretory, extracellular matrix transport, and mesenchymal sensing targets, supporting the use of this approach in high-content chemical screening of the complete Shh pathway. Together, these findings demonstrate a novel and practical microphysiological model with broad utility for investigating epithelial-mesenchymal interactions and environmental signaling disruptions in development.
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Affiliation(s)
- Brian P Johnson
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States.,Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States.,Department of Biomedical Engineering, Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, United States.,Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, WI, United States
| | - Ross A Vitek
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States
| | - Molly M Morgan
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States
| | - Dustin M Fink
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, United States
| | - Tyler G Beames
- Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, WI, United States.,Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, United States
| | - Peter G Geiger
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States
| | - David J Beebe
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States
| | - Robert J Lipinski
- Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, WI, United States.,Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, United States
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17
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Rivera-González KS, Beames TG, Lipinski RJ. Examining the developmental toxicity of piperonyl butoxide as a Sonic hedgehog pathway inhibitor. CHEMOSPHERE 2021; 264:128414. [PMID: 33007564 PMCID: PMC9158378 DOI: 10.1016/j.chemosphere.2020.128414] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 05/05/2023]
Abstract
Piperonyl butoxide (PBO) is a semisynthetic chemical present in hundreds of pesticide formulations used in agricultural, commercial, and residential settings. PBO acts as a pesticide synergist by inhibiting insect cytochrome P450 enzymes and is often present at much higher concentrations than active insecticidal ingredients. PBO was recently discovered to also inhibit Sonic hedgehog (Shh) signaling, a key molecular pathway in embryonic development and in brain and face morphogenesis. Recent animal model studies have shown that in utero PBO exposure can cause overt craniofacial malformations or more subtle neurodevelopmental abnormalities. Related adverse developmental outcomes in humans are etiologically heterogeneous, and, while studies are limited, PBO exposure during pregnancy has been linked to neurodevelopmental deficits. Contextualized in PBO's newly recognized mechanism as a Shh signaling inhibitor, these findings support more rigorous examination of the developmental toxicity of PBO and its potential contribution to etiologically complex human birth defects. In this review, we highlight environmental sources of human PBO exposure and summarize existing animal studies examining the developmental impact of prenatal PBO exposure. Also presented are critical knowledge gaps in our understanding of PBO's pharmacokinetics and potential role in gene-environment and environment-environment interactions that should be addressed to better understand the human health impact of environmental PBO exposure.
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Affiliation(s)
- Kenneth S Rivera-González
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, 53706, USA; Molecular and Environmental Toxicology Graduate Training Program, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Tyler G Beames
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, 53706, USA; Molecular and Environmental Toxicology Graduate Training Program, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, 53706, USA; Molecular and Environmental Toxicology Graduate Training Program, University of Wisconsin-Madison, Madison, WI, 53706, USA.
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18
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Bae JW, Kwon WS. Piperonyl butoxide, a synergist of pesticides can elicit male-mediated reproductive toxicity. Reprod Toxicol 2021; 100:120-125. [PMID: 33515694 DOI: 10.1016/j.reprotox.2021.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 01/10/2021] [Accepted: 01/22/2021] [Indexed: 01/15/2023]
Abstract
A semi-synthetic methylenedioxyphenyl compound piperonyl butoxide (PBO) has been used as a ubiquitous synergist to increase the insecticidal effect of pesticides for agricultural and household use. Despite previously demonstrated effects of PBO, the detailed mechanism of PBO in spermatozoa and reproductive toxic effects on male germ cells have not been fully elucidated. Therefore, this study evaluated the effects of PBO on various sperm functions during capacitation and clarified the mechanisms of reproductive toxic effects on male fertility at different concentrations of PBO (0.1, 1, 10, and 100 μM). Sperm motility and kinematics were assessed using computer-assisted sperm analysis and the status of capacitation was evaluated using combined H33258/chlortetracycline (CTC) staining. Intracellular adenosine triphosphate (ATP) and cell viability levels were also measured. In addition, protein kinase A (PKA) activity and protein tyrosine phosphorylation were evaluated. In addition, in vitro fertilization was performed to determine the effects of PBO on cleavage and blastocyst formation rates. We found that PBO significantly decreased sperm motility, kinematics, and acrosome-reacted and capacitated spermatozoa. In addition, PBO suppressed the intracellular ATP levels and directly affected cell viability. Moreover, PBO detrimentally decreased the activation of PKA and altered the levels of tyrosine-phosphorylated proteins. Consequently, cleavage and blastocyst formation rates were significantly reduced in a dose-dependent manner. In line with our observations, the synergist of pesticides PBO may directly and/or indirectly cause disorder in male fertility. Hence, we suggest that careful attention is made to consider reproductive toxicity when using PBO as a synergist.
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Affiliation(s)
- Jeong-Won Bae
- Department of Animal Science and Biotechnology, Kyungpook National University, Sangju, Gyeongsangbuk-do, 37224, Republic of Korea
| | - Woo-Sung Kwon
- Department of Animal Science and Biotechnology, Kyungpook National University, Sangju, Gyeongsangbuk-do, 37224, Republic of Korea; Department of Animal Biotechnology, Kyungpook National University, Sangju, Gyeongsangbuk-do, 37224, Republic of Korea.
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19
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Addissie YA, Troia A, Wong ZC, Everson JL, Kozel BA, Muenke M, Lipinski RJ, Malecki KMC, Kruszka P. Identifying environmental risk factors and gene-environment interactions in holoprosencephaly. Birth Defects Res 2020; 113:63-76. [PMID: 33111505 DOI: 10.1002/bdr2.1834] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/11/2020] [Accepted: 10/16/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND Holoprosencephaly is the most common malformation of the forebrain (1 in 250 embryos) with severe consequences for fetal and child development. This study evaluates nongenetic factors associated with holoprosencephaly risk, severity, and gene-environment interactions. METHODS For this retrospective case control study, we developed an online questionnaire focusing on exposures to common and rare toxins/toxicants before and during pregnancy, nutritional factors, maternal health history, and demographic factors. Patients with holoprosencephaly were primarily ascertained from our ongoing genetic and clinical studies of holoprosencephaly. Controls included children with Williams-Beuren syndrome (WBS) ascertained through online advertisements in a WBD support group and fliers. RESULTS Difference in odds of exposures between cases and controls as well as within cases with varying holoprosencephaly severity were studied. Cases included children born with holoprosencephaly (n = 92) and the control group consisted of children with WBS (n = 56). Pregnancy associated risk associated with holoprosencephaly included maternal pregestational diabetes (9.2% of cases and 0 controls, p = .02), higher alcohol consumption (adjusted odds ratio [aOR], 1.73; 95% CI, 0.88-15.71), and exposure to consumer products such as aerosols or sprays including hair sprays (aOR, 2.46; 95% CI, 0.89-7.19). Significant gene-environment interactions were identified including for consumption of cheese (p < .05) and espresso drinks (p = .03). CONCLUSION The study identifies modifiable risk factors and gene-environment interactions that should be considered in future prevention of holoprosencephaly. Studies with larger HPE cohorts will be needed to confirm these findings.
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Affiliation(s)
- Yonit A Addissie
- Medical Genetics Branch, National Human Genome Research Institute, The National Institutes of Health, Bethesda, Maryland, USA
| | - Angela Troia
- Cardiovascular & Pulmonary Branch, National Heart, Lung, and Blood Institute, The National Institutes of Health, Bethesda, Maryland, USA
| | - Zoe C Wong
- Cardiovascular & Pulmonary Branch, National Heart, Lung, and Blood Institute, The National Institutes of Health, Bethesda, Maryland, USA
| | - Joshua L Everson
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA.,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Beth A Kozel
- Cardiovascular & Pulmonary Branch, National Heart, Lung, and Blood Institute, The National Institutes of Health, Bethesda, Maryland, USA
| | - Maximilian Muenke
- Medical Genetics Branch, National Human Genome Research Institute, The National Institutes of Health, Bethesda, Maryland, USA
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA.,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Kristen M C Malecki
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, USA.,Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Paul Kruszka
- Medical Genetics Branch, National Human Genome Research Institute, The National Institutes of Health, Bethesda, Maryland, USA
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20
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Everson JL, Batchu R, Eberhart JK. Multifactorial Genetic and Environmental Hedgehog Pathway Disruption Sensitizes Embryos to Alcohol-Induced Craniofacial Defects. Alcohol Clin Exp Res 2020; 44:1988-1996. [PMID: 32767777 PMCID: PMC7692922 DOI: 10.1111/acer.14427] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 07/28/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND Prenatal alcohol exposure (PAE) is perhaps the most common environmental cause of human birth defects. These exposures cause a range of structural and neurological defects, including facial dysmorphologies, collectively known as fetal alcohol spectrum disorders (FASD). While PAE causes FASD, phenotypic outcomes vary widely. It is thought that multifactorial genetic and environmental interactions modify the effects of PAE. However, little is known of the nature of these modifiers. Disruption of the Hedgehog (Hh) signaling pathway has been suggested as a modifier of ethanol teratogenicity. In addition to regulating the morphogenesis of craniofacial tissues commonly disrupted in FASD, a core member of the Hh pathway, Smoothened, is susceptible to modulation by structurally diverse chemicals. These include environmentally prevalent teratogens like piperonyl butoxide (PBO), a synergist found in thousands of pesticide formulations. METHODS Here, we characterize multifactorial genetic and environmental interactions using a zebrafish model of craniofacial development. RESULTS We show that loss of a single allele of shha sensitized embryos to both alcohol- and PBO-induced facial defects. Co-exposure of PBO and alcohol synergized to cause more frequent and severe defects. The effects of this co-exposure were even more profound in the genetically susceptible shha heterozygotes. CONCLUSIONS Together, these findings shed light on the multifactorial basis of alcohol-induced craniofacial defects. In addition to further implicating genetic disruption of the Hh pathway in alcohol teratogenicity, our findings suggest that co-exposure to environmental chemicals that perturb Hh signaling may be important variables in FASD and related craniofacial disorders.
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Affiliation(s)
- Joshua L. Everson
- From the Department of Molecular BiosciencesSchool of Natural SciencesUniversity of Texas at AustinAustinTexasUSA
- Waggoner Center for Alcohol and Addiction ResearchSchool of PharmacyUniversity of Texas at AustinAustinTexasUSA
| | - Rithik Batchu
- From the Department of Molecular BiosciencesSchool of Natural SciencesUniversity of Texas at AustinAustinTexasUSA
| | - Johann K. Eberhart
- From the Department of Molecular BiosciencesSchool of Natural SciencesUniversity of Texas at AustinAustinTexasUSA
- Waggoner Center for Alcohol and Addiction ResearchSchool of PharmacyUniversity of Texas at AustinAustinTexasUSA
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Polychlorinated Biphenyls (PCBs): Risk Factors for Autism Spectrum Disorder? TOXICS 2020; 8:toxics8030070. [PMID: 32957475 PMCID: PMC7560399 DOI: 10.3390/toxics8030070] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/14/2020] [Accepted: 09/16/2020] [Indexed: 02/06/2023]
Abstract
Autism spectrum disorder (ASD) includes a group of multifactorial neurodevelopmental disorders defined clinically by core deficits in social reciprocity and communication, restrictive interests and repetitive behaviors. ASD affects one in 54 children in the United States, one in 89 children in Europe, and one in 277 children in Asia, with an estimated worldwide prevalence of 1-2%. While there is increasing consensus that ASD results from complex gene x environment interactions, the identity of specific environmental risk factors and the mechanisms by which environmental and genetic factors interact to determine individual risk remain critical gaps in our understanding of ASD etiology. Polychlorinated biphenyls (PCBs) are ubiquitous environmental contaminants that have been linked to altered neurodevelopment in humans. Preclinical studies demonstrate that PCBs modulate signaling pathways implicated in ASD and phenocopy the effects of ASD risk genes on critical morphometric determinants of neuronal connectivity, such as dendritic arborization. Here, we review human and experimental evidence identifying PCBs as potential risk factors for ASD and discuss the potential for PCBs to influence not only core symptoms of ASD, but also comorbidities commonly associated with ASD, via effects on the central and peripheral nervous systems, and/or peripheral target tissues, using bladder dysfunction as an example. We also discuss critical data gaps in the literature implicating PCBs as ASD risk factors. Unlike genetic factors, which are currently irreversible, environmental factors are modifiable risks. Therefore, data confirming PCBs as risk factors for ASD may suggest rational approaches for the primary prevention of ASD in genetically susceptible individuals.
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Beames TG, Lipinski RJ. Gene-environment interactions: aligning birth defects research with complex etiology. Development 2020; 147:147/21/dev191064. [PMID: 32680836 DOI: 10.1242/dev.191064] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Developmental biologists rely on genetics-based approaches to understand the origins of congenital abnormalities. Recent advancements in genomics have made it easier than ever to investigate the relationship between genes and disease. However, nonsyndromic birth defects often exhibit non-Mendelian inheritance, incomplete penetrance or variable expressivity. The discordance between genotype and phenotype indicates that extrinsic factors frequently impact the severity of genetic disorders and vice versa. Overlooking gene-environment interactions in birth defect etiology limits our ability to identify and eliminate avoidable risks. We present mouse models of sonic hedgehog signaling and craniofacial malformations to illustrate both the importance of and current challenges in resolving gene-environment interactions in birth defects. We then prescribe approaches for overcoming these challenges, including use of genetically tractable and environmentally responsive in vitro systems. Combining emerging technologies with molecular genetics and traditional animal models promises to advance our understanding of birth defect etiology and improve the identification and protection of vulnerable populations.
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Affiliation(s)
- Tyler G Beames
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA.,Molecular and Environmental Toxicology Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA .,Molecular and Environmental Toxicology Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53706, USA
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Dialysis encephalopathy: precipitating factors and improvement in prognosis. Clin Nephrol 1981; 13:60. [PMID: 32456660 PMCID: PMC7249421 DOI: 10.1186/s13045-020-00901-6] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 05/18/2020] [Indexed: 12/16/2022] Open
Abstract
Cancer stem cells (CSCs) contribute to the initiation, recurrence, and metastasis of cancer; however, there are still no drugs targeting CSCs in clinical application. There are several signaling pathways playing critical roles in CSC progression, such as the Wnt, Hedgehog, Notch, Hippo, and autophagy signaling pathways. Additionally, targeting the ferroptosis signaling pathway was recently shown to specifically kill CSCs. Therefore, targeting these pathways may suppress CSC progression. The structure of small-molecule drugs shows a good spatial dispersion, and its chemical properties determine its good druggability and pharmacokinetic properties. These characteristics make small-molecule drugs show a great advantage in drug development, which is increasingly popular in the market. Thus, in this review, we will summarize the current researches on the small-molecule compounds suppressing CSC progression, including inhibitors of Wnt, Notch, Hedgehog, and autophagy pathways, and activators of Hippo and ferroptosis pathways. These small-molecule compounds emphasize CSC importance in tumor progression and propose a new strategy to treat cancer in clinic via targeting CSCs.
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