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Vyas H, Mohi A, Boyce M, Durham EL, Cray JJ. In utero nicotine exposure affects murine palate development. Orthod Craniofac Res 2024. [PMID: 39092604 DOI: 10.1111/ocr.12844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 05/29/2024] [Accepted: 07/22/2024] [Indexed: 08/04/2024]
Abstract
OBJECTIVES Despite data linking smoking to increased risk of fetal morbidity and mortality, 11% of pregnant women continue to smoke or use alternative nicotine products. Studies confirm that nicotine exposure during pregnancy increases the incidence of birth defects; however, little research has focused on specific anatomic areas based on timing of exposure. We aim to determine critical in utero and postnatal periods of nicotine exposure that affect craniofacial development, specifically palate growth. Malformation of the palatal structures can result in numerous complications including facial growth disturbance, or impeding airway function. We hypothesized that both in utero and postnatal nicotine exposure will alter palate development. MATERIALS AND METHODS We administered pregnant C57BL6 mice water supplemented with 100 μg/mL nicotine during early pregnancy, throughout pregnancy, during pregnancy and lactation, or lactation only. Postnatal day 15 pups underwent micro-computed tomography (μCT) analyses specific to the palate. RESULTS Resultant pups revealed significant differences in body weight from lactation-only nicotine exposure, and μCT investigation revealed several dimensions affected by lactation-only nicotine exposure, including palate width, palate and cranial base lengths, and mid-palatal suture width. CONCLUSIONS These results demonstrate the direct effects of nicotine on the developing palate beyond simple tobacco use. Nicotine exposure through tobacco alternatives, cessation methods, and electronic nicotine delivery systems (ENDS) may disrupt normal growth and development of the palate during development and the postnatal periods of breastfeeding. Due to the recent dramatic increase in the use of ENDS, future research will focus specifically on this nicotine delivery method.
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Affiliation(s)
- Heema Vyas
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Amr Mohi
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Mark Boyce
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, Ohio, USA
- The Ohio State University College of Dentistry, Columbus, Ohio, USA
| | - Emily L Durham
- Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - James J Cray
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, Ohio, USA
- The Ohio State University College of Dentistry, Columbus, Ohio, USA
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2
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Kishinchand R, Boyce M, Vyas H, Sewell L, Mohi A, Brengartner L, Miller R, Gorr MW, Wold LE, Cray J. In Utero Exposure to Maternal Electronic Nicotine Delivery System use Demonstrate Alterations to Craniofacial Development. Cleft Palate Craniofac J 2024; 61:1389-1397. [PMID: 36916055 DOI: 10.1177/10556656231163400] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
OBJECTIVE Develop a model for the study of Electronic Nicotine Device (ENDS) exposure on craniofacial development. DESIGN Experimental preclinical design followed as pregnant murine dams were randomized and exposed to filtered air exposure, carrier exposure consisting of 50% volume of propylene glycol and vegetable glycine (ENDS Carrier) respectively, or carrier exposure with 20 mg/ml of nicotine added to the liquid vaporizer (ENDS carrier with nicotine). SETTING Preclinical murine model exposure using the SciReq exposure system. PARTICIPANTS C57BL6 adult 8 week old female pregnant mice and exposed in utero litters. INTERVENTIONS Exposure to control filtered air, ENDS carrier or ENDS carrier with nicotine added throughout gestation at 1 puff/minute, 4 h/day, five days a week. MAIN OUTCOME MEASURES Cephalometric measures of post-natal day 15 pups born as exposed litters. RESULTS Data suggests alterations to several facial morphology parameters in the developing offspring, suggesting electronic nicotine device systems may alter facial growth if used during pregnancy. CONCLUSIONS Future research should concentrate on varied formulations and exposure regimens of ENDS to determine timing windows of exposures and ENDS formulations that may be harmful to craniofacial development.
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Affiliation(s)
- Rajiv Kishinchand
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Mark Boyce
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Heema Vyas
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Leslie Sewell
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Amr Mohi
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Lexie Brengartner
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Roy Miller
- School of Nursing, The Ohio State University, Columbus, OH 43210, USA
| | - Matthew W Gorr
- School of Nursing, The Ohio State University, Columbus, OH 43210, USA
- Department of Physiology and Cell Biology, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Loren E Wold
- School of Nursing, The Ohio State University, Columbus, OH 43210, USA
- Department of Physiology and Cell Biology, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - James Cray
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, Columbus, OH 43210, USA
- Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
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3
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Yu Z, Dong Y, Chen Y, Aleya L, Zhao Y, Yao L, Gu W. It is time to explore the impact of length of gestation and fetal health on the human lifespan. Aging Cell 2024; 23:e14157. [PMID: 38558485 PMCID: PMC11019132 DOI: 10.1111/acel.14157] [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: 12/13/2023] [Revised: 02/20/2024] [Accepted: 03/12/2024] [Indexed: 04/04/2024] Open
Abstract
A recently proposed principal law of lifespan (PLOSP) proposes to extend the whole human lifespan by elongating different life stages. As the preborn stage of a human being, gestation is the foundation for the healthy development of the human body. The antagonistic pleiotropy (AP) theory of aging states that there is a trade-off between early life fitness and late-life mortality. The question is whether slower development during the gestation period would be associated with a longer lifespan. Among all living creatures, the length of the gestation period is highly positively correlated to the length of the lifespan, although such a correlation is thought to be influenced by the body sizes of different species. While examining the relationship between lifespan length and body size within the same species, dogs exhibit a negative correlation between lifespans and body sizes, while there is no such correlation among domestic cats. For humans, most adverse gestational environments shorten the period of gestation, and their impacts are long-term. While many issues remain unsolved, various developmental features have been linked to the conditions during the gestation period. Given that the length of human pregnancies can vary randomly by as long as 5 weeks, it is worth investigating whether a slow steady healthy gestation over a longer period will be related to a longer and healthier lifespan. This article discusses the potential benefits, negative impacts, and challenges of the relative elongation of the gestation period.
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Affiliation(s)
- Zhuo Yu
- Heilongjiang Academy of Traditional Chinese MedicineHarbinChina
| | - Yushan Dong
- Graduate School of Heilongjiang University of Chinese MedicineHarbinHeilongjiangChina
| | - Yuhan Chen
- Guang'anmen Hospital, China Academy of Chinese Medical SciencesBeijingChina
| | - Lotfi Aleya
- Chrono‐Environnement Laboratory, UMR CNRS 6249Bourgogne Franche‐Comté UniversityBesançon CedexFrance
| | - Yinhuan Zhao
- Department of Rheumatism, Shanghai Traditional Chinese Medicine Integrated HospitalShanghai University of Traditional Chinese MedicineShanghaiChina
| | - Lan Yao
- College of Health Management, Harbin Medical UniversityHarbinHeilongjiangChina
- Department of Orthopedic Surgery and BME‐Campbell ClinicUniversity of Tennessee Health Science CentreMemphisTennesseeUSA
| | - Weikuan Gu
- Department of Orthopedic Surgery and BME‐Campbell ClinicUniversity of Tennessee Health Science CentreMemphisTennesseeUSA
- Research Lt. Col. Luke WeathersJr. VA Medical CenterMemphisTennesseeUSA
- Department of Pharmaceutical SciencesUniversity of Tennessee Health Science CenterMemphisTennesseeUSA
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4
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Ozekin YH, Saal ML, Pineda RH, Moehn K, Ordonez-Erives MA, Delgado Figueroa MF, Frazier C, Korth KM, Königshoff M, Bates EA, Vladar EK. Intrauterine exposure to nicotine through maternal vaping disrupts embryonic lung and skeletal development via the Kcnj2 potassium channel. Dev Biol 2023; 501:111-123. [PMID: 37353105 PMCID: PMC10445547 DOI: 10.1016/j.ydbio.2023.06.002] [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: 09/29/2022] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/25/2023]
Abstract
Smoking cigarettes during pregnancy is associated with adverse effects on infants including low birth weight, defective lung development, and skeletal abnormalities. Pregnant women are increasingly turning to vaping [use of electronic (e)-cigarettes] as a perceived safer alternative to cigarettes. However, nicotine disrupts fetal development, suggesting that like cigarette smoking, nicotine vaping may be detrimental to the fetus. To test the impact of maternal vaping on fetal lung and skeletal development in mice, pregnant dams were exposed to e-cigarette vapor throughout gestation. At embryonic day (E)18.5, vape exposed litter sizes were reduced, and some embryos exhibited growth restriction compared to air exposed controls. Fetal lungs were collected for histology and whole transcriptome sequencing. Maternally nicotine vaped embryos exhibited histological and transcriptional changes consistent with impaired distal lung development. Embryonic lung gene expression changes mimicked transcriptional changes observed in adult mouse lungs exposed to cigarette smoke, suggesting that the developmental defects may be due to direct nicotine exposure. Fetal skeletons were analyzed for craniofacial and long bone lengths. Nicotine directly binds and inhibits the Kcnj2 potassium channel which is important for bone development. The length of the maxilla, palatal shelves, humerus, and femur were reduced in vaped embryos, which was further exacerbated by loss of one copy of the Kcnj2 gene. Nicotine vapor exposed Kcnj2KO/+ embryos also had significantly lower birth weights than unexposed animals of either genotype. Kcnj2 mutants had severely defective lungs with and without vape exposure, suggesting that potassium channels may be broadly involved in mediating the detrimental developmental effects of nicotine vaping. These data indicate that intrauterine nicotine exposure disrupts fetal lung and skeletal development likely through inhibition of Kcnj2.
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Affiliation(s)
- Yunus H Ozekin
- Section of Developmental Biology, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Maxwell L Saal
- Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Ricardo H Pineda
- Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Kayla Moehn
- Section of Developmental Biology, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Madison A Ordonez-Erives
- Section of Developmental Biology, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Maria F Delgado Figueroa
- Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Caleb Frazier
- Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Kamryn M Korth
- Section of Developmental Biology, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Melanie Königshoff
- Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Emily A Bates
- Section of Developmental Biology, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
| | - Eszter K Vladar
- Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
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5
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Chen J, Yao Y, Wang Y, Wang X, Peng X, Li T, Liu Y, Du J. Autophagy triggered by the ROS/ERK signaling pathway protects mouse embryonic palatal cells from apoptosis induced by nicotine. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:81909-81922. [PMID: 35739442 DOI: 10.1007/s11356-022-21496-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 06/12/2022] [Indexed: 06/15/2023]
Abstract
Maternal cigarette smoking during pregnancy is a known high-risk factor for having a child with a cleft lip and/or palate (CLP), a common congenital malformation. Nicotine is the major teratogen component of cigarettes and e-cigarettes, and nicotine plays an important role in the development of CLP. However, the mechanism underlying nicotine's effect on CLP remains unclear. Here, we aimed to determine the role and molecular mechanisms of nicotine-induced autophagy, an important process involved in regulating the cellular stress response in mouse embryonic palatal cells (MEPCs). First, we found that nicotine promoted MEPCs proliferation and inhibited their apoptosis from 0 to 12 h. After 12 h, the proliferation was inhibited, and apoptosis was promoted. The migration of MEPCs was also inhibited by nicotine. Simultaneously, long-term nicotine stimulation inhibited the osteogenic differentiation of MEPCs. We then found that nicotine significantly increased autophagy flux in MEPCs at 12 h by increasing the expression of microtubule-associated protein light chain 3 (LC3) and reducing P62 expression levels. After nicotine exposure, intracellular reactive oxygen species (ROS) and extracellular signal-regulated kinase-1/2 (ERK1/2) expression significantly increased, and the expression of ERK1/2 was reversed by the ROS scavenging agent N-acetylcysteine (NAC). Moreover, the autophagy induced by nicotine was reversed by SCH772984, a specific inhibitor of ERK1/2, and the autophagy inhibitor chloroquine (CQ). These results suggest that in the early stage of nicotine exposure, MEPCs may trigger autophagy through the ROS/ERK1/2 signaling pathway to avoid cell damage caused by nicotine.
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Affiliation(s)
- Jing Chen
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China
| | - Yaxia Yao
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China
| | - Yijia Wang
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China
| | - Xiaotong Wang
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China
| | - Xia Peng
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China
| | - Tianli Li
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China
| | - Ying Liu
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China
| | - Juan Du
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, 100050, China.
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6
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Borrego-Soto G, Eberhart JK. Embryonic Nicotine Exposure Disrupts Adult Social Behavior and Craniofacial Development in Zebrafish. TOXICS 2022; 10:612. [PMID: 36287892 PMCID: PMC9611253 DOI: 10.3390/toxics10100612] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/05/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
Cigarette smoking remains the leading cause of preventable death and morbidity worldwide. Smoking during pregnancy is associated with numerous adverse birth outcomes, including craniofacial and behavioral abnormalities. Although tobacco smoke contains more than 4000 toxic substances, nicotine is addictive and is likely the most teratogenic substance in cigarette smoke. However, much remains to be determined about the effects of embryonic nicotine exposure on behavior and craniofacial development. Therefore, this study evaluated adult social behavior in zebrafish, craniofacial defects, and nicotine metabolism in embryos after embryonic nicotine exposure. Zebrafish embryos were exposed to different doses of nicotine beginning at 6 h post fertilization. To evaluate craniofacial defects, the embryos were collected at 4 days post fertilization and stained with Alizarin Red and Alcian Blue. For behavioral testing, embryos were reared to adulthood. To evaluate nicotine metabolism, cotinine levels were analyzed at various time points. Our findings demonstrate that embryonic exposure to nicotine modifies social behavior in adulthood, causes craniofacial defects with reduced size of craniofacial cartilages, and that zebrafish metabolize nicotine to cotinine, as in humans. Together, our data suggest that zebrafish are useful as a model for studying nicotine-related diseases.
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7
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Ren M, Lotfipour S, Leslie F. Unique effects of nicotine across the lifespan. Pharmacol Biochem Behav 2022; 214:173343. [PMID: 35122768 PMCID: PMC8904294 DOI: 10.1016/j.pbb.2022.173343] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 12/23/2022]
Abstract
Smoking remains the leading cause of preventable death in the United States. Although combustible cigarettes are largely being replaced by tobacco-free products, nicotine use continues to increase in vulnerable populations, including youth, adolescents, and pregnant women. Nicotine exerts unique effects on specific brain regions during distinct developmental periods due to the dynamic expression of nicotinic acetylcholine receptors (nAChRs) throughout the lifespan. Nicotine exposure is a health concern not only for adults but also has neurotoxic effects on the fetus, newborn, child, and adolescent. In this review, we aim to highlight the dynamic roles of nAChRs throughout gestation, adolescence, and adulthood. We also provide clinical and preclinical evidence of the neurodevelopmental, cognitive, and behavioral consequences of nicotine exposure at different developmental periods. This comprehensive review highlights unique effects of nicotine throughout the lifespan to help elucidate interventions and public health measures to protect sensitive populations from nicotine exposure.
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Affiliation(s)
- Michelle Ren
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University of California, Irvine, Irvine, CA, USA.
| | - Shahrdad Lotfipour
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University of California, Irvine, Irvine, CA, USA; Department of Emergency Medicine, School of Medicine, University of California, Irvine, Irvine, CA, USA; Department of Pathology and Laboratory Medicine, School of Medicine, University of California, Irvine, Irvine, CA, USA
| | - Frances Leslie
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University of California, Irvine, Irvine, CA, USA
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Dickinson AJG, Turner SD, Wahl S, Kennedy AE, Wyatt BH, Howton DA. E-liquids and vanillin flavoring disrupts retinoic acid signaling and causes craniofacial defects in Xenopus embryos. Dev Biol 2022; 481:14-29. [PMID: 34543654 PMCID: PMC8665092 DOI: 10.1016/j.ydbio.2021.09.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 09/08/2021] [Accepted: 09/11/2021] [Indexed: 01/03/2023]
Abstract
Environmental teratogens such as smoking are known risk factors for developmental disorders such as cleft palate. While smoking rates have declined, a new type of smoking, called vaping is on the rise. Vaping is the use of e-cigarettes to vaporize and inhale an e-liquid containing nicotine and food-like flavors. There is the potential that, like smoking, vaping could also pose a danger to the developing human. Rather than waiting for epidemiological and mammalian studies, we have turned to an aquatic developmental model, Xenopus laevis, to more quickly assess whether e-liquids contain teratogens that could lead to craniofacial malformations. Xenopus, like zebrafish, has the benefit of being a well-established developmental model and has also been effective in predicting whether a chemical could be a teratogen. We have determined that embryonic exposure to dessert flavored e-liquids can cause craniofacial abnormalities, including an orofacial cleft in Xenopus. To better understand the underlying mechanisms contributing to these defects, transcriptomic analysis of the facial tissues of embryos exposed to a representative dessert flavored e-liquid vapor extract was performed. Analysis of differentially expressed genes in these embryos revealed several genes associated with retinoic acid metabolism or the signaling pathway. Consistently, retinoic acid receptor inhibition phenocopied the craniofacial defects as those embryos exposed to the vapor extract of the e-liquid. Such malformations also correlated with a group of common differentially expressed genes, two of which are associated with midface birth defects in humans. Further, e-liquid exposure sensitized embryos to forming craniofacial malformations when they already had depressed retinoic acid signaling. Moreover, 13-cis-retinoic acid treatment could significantly reduce the e-liquid induced malformation in the midface. Such results suggest the possibility of an interaction between retinoic acid signaling and e-liquid exposure. One of the most popular and concentrated flavoring chemicals in dessert flavored e-liquids is vanillin. Xenopus embryos exposed to this chemical closely resembled embryos exposed to dessert-like e-liquids and a retinoic acid receptor antagonist. In summary, we determined that e-liquid chemicals, in particular vanillin, can cause craniofacial defects potentially by dysregulating retinoic acid signaling. This work warrants the evaluation of vanillin and other such flavoring additives in e-liquids on mammalian development.
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Affiliation(s)
| | - Stephen D Turner
- Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, VA, USA; Signature Science LLC, Charlottesville, VA, USA
| | - Stacey Wahl
- Research and Education Department, Tompkins-McCaw Library for the Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Allyson E Kennedy
- Directorate for Computer and Information Science and Engineering, National Science Foundation, Alexandria, VA, USA
| | - Brent H Wyatt
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, 27607, USA
| | - Deborah A Howton
- Department of Biology, Virginia Commonwealth University, Richmond, VA, USA
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9
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Association between Smoking during Pregnancy and Short Root Anomaly in Offspring. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111662. [PMID: 34770175 PMCID: PMC8582870 DOI: 10.3390/ijerph182111662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/01/2021] [Accepted: 11/02/2021] [Indexed: 12/18/2022]
Abstract
Short root anomaly (SRA) is a dental anomaly with short dental roots and its pathogenesis is poorly understood. This study investigated the association between maternal smoking during pregnancy and SRA in offspring. A survey was conducted on 558 children aged 8–16 years from two public schools in Ulaanbaatar, Mongolia. SRA was diagnosed using cases with a root-crown ratio of maxillary central incisors of ≤1.0. A questionnaire survey was conducted to assess maternal lifestyle habits. Multiple logistic regression was used to analyse the association between maternal smoking during pregnancy and SRA in offspring after adjusting for possible confounders. The prevalence of SRA in these children was 14.2%. Children whose mothers smoked from pregnancy to date were found to be 4.95 times (95% confidence interval [CI]: 1.65–14.79) more likely to have SRA than those whose mothers never smoked, after adjusting for possible confounders. Additionally, children whose mothers had been exposed to passive smoking during pregnancy were found to be 1.86 times (95% CI: 1.02–3.40) more likely to have SRA than those whose mothers had not been exposed to passive smoke. Our population-based study suggests that maternal and passive smoking exposure during pregnancy can affect tooth root formation in children.
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10
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Verheijen N, Suttorp CM, van Rheden REM, Regan RF, Helmich MPAC, Kuijpers-Jagtman AM, Wagener FADTG. CXCL12-CXCR4 Interplay Facilitates Palatal Osteogenesis in Mice. Front Cell Dev Biol 2020; 8:771. [PMID: 32974338 PMCID: PMC7471603 DOI: 10.3389/fcell.2020.00771] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 07/22/2020] [Indexed: 12/19/2022] Open
Abstract
Cranial neural crest cells (CNCCs), identified by expression of transcription factor Sox9, migrate to the first branchial arch and undergo proliferation and differentiation to form the cartilage and bone structures of the orofacial region, including the palatal bone. Sox9 promotes osteogenic differentiation and stimulates CXCL12-CXCR4 chemokine-receptor signaling, which elevates alkaline phosphatase (ALP)-activity in osteoblasts to initiate bone mineralization. Disintegration of the midline epithelial seam (MES) is crucial for palatal fusion. Since we earlier demonstrated chemokine-receptor mediated signaling by the MES, we hypothesized that chemokine CXCL12 is expressed by the disintegrating MES to promote the formation of an osteogenic center by CXCR4-positive osteoblasts. Disturbed migration of CNCCs by excess oxidative and inflammatory stress is associated with increased risk of cleft lip and palate (CLP). The cytoprotective heme oxygenase (HO) enzymes are powerful guardians harnessing injurious oxidative and inflammatory stressors and enhances osteogenic ALP-activity. By contrast, abrogation of HO-1 or HO-2 expression promotes pregnancy pathologies. We postulate that Sox9, CXCR4, and HO-1 are expressed in the ALP-activity positive osteogenic regions within the CNCCs-derived palatal mesenchyme. To investigate these hypotheses, we studied expression of Sox9, CXCL12, CXCR4, and HO-1 in relation to palatal osteogenesis between E15 and E16 using (immuno)histochemical staining of coronal palatal sections in wild-type (wt) mice. In addition, the effects of abrogated HO-2 expression in HO-2 KO mice and inhibited HO-1 and HO-2 activity by administrating HO-enzyme activity inhibitor SnMP at E11 in wt mice were investigated at E15 or E16 following palatal fusion. Overexpression of Sox9, CXCL12, CXCR4, and HO-1 was detected in the ALP-activity positive osteogenic regions within the palatal mesenchyme. Overexpression of Sox9 and CXCL12 by the disintegrating MES was detected. Neither palatal fusion nor MES disintegration seemed affected by either HO-2 abrogation or inhibition of HO-activity. Sox9 progenitors seem important to maintain the CXCR4-positive osteoblast pool to drive osteogenesis. Sox9 expression may facilitate MES disintegration and palatal fusion by promoting epithelial-to-mesenchymal transformation (EMT). CXCL12 expression by the MES and the palatal mesenchyme may promote osteogenic differentiation to create osteogenic centers. This study provides novel evidence that CXCL12-CXCR4 interplay facilitates palatal osteogenesis and palatal fusion in mice.
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Affiliation(s)
- Nanne Verheijen
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Christiaan M Suttorp
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands.,Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - René E M van Rheden
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Raymond F Regan
- Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Maria P A C Helmich
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Anne Marie Kuijpers-Jagtman
- Department of Orthodontics, University of Groningen, University Medical Center Groningen, Groningen, Netherlands.,Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Bern, Switzerland.,Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia
| | - Frank A D T G Wagener
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands.,Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
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McGrath-Morrow SA, Gorzkowski J, Groner JA, Rule AM, Wilson K, Tanski SE, Collaco JM, Klein JD. The Effects of Nicotine on Development. Pediatrics 2020; 145:peds.2019-1346. [PMID: 32047098 PMCID: PMC7049940 DOI: 10.1542/peds.2019-1346] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/05/2019] [Indexed: 01/08/2023] Open
Abstract
Recently, there has been a significant increase in the use of noncombustible nicotine-containing products, including electronic cigarettes (e-cigarettes). Of increasing popularity are e-cigarettes that can deliver high doses of nicotine over short periods of time. These devices have led to a rise in nicotine addiction in adolescent users who were nonsmokers. Use of noncombustible nicotine products by pregnant mothers is also increasing and can expose the developing fetus to nicotine, a known teratogen. In addition, young children are frequently exposed to secondhand and thirdhand nicotine aerosols generated by e-cigarettes, with little understanding of the effects these exposures can have on health. With the advent of these new nicotine-delivery systems, many concerns have arisen regarding the short- and long-term health effects of nicotine on childhood health during all stages of development. Although health studies on nicotine exposure alone are limited, educating policy makers and health care providers on the potential health effects of noncombustible nicotine is needed because public acceptance of these products has become so widespread. Most studies evaluating the effects of nicotine on health have been undertaken in the context of smoke exposure. Nevertheless, in vitro and in vivo preclinical studies strongly indicate that nicotine exposure alone can adversely affect the nervous, respiratory, immune, and cardiovascular systems, particularly when exposure occurs during critical developmental periods. In this review, we have included both preclinical and clinical studies to identify age-related health effects of nicotine exposure alone, examining the mechanisms underlying these effects.
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Affiliation(s)
- Sharon A. McGrath-Morrow
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois;,Eudowood Division of Pediatric Respiratory Sciences, Department of Pediatrics, School of Medicine and
| | - Julie Gorzkowski
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois
| | - Judith A. Groner
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois;,Department of Pediatrics, Nationwide Children’s Hospital, Columbus, Ohio
| | - Ana M. Rule
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois;,Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Karen Wilson
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois;,Department of Pediatrics, Icahn School of Medicine at Mount Sinai and Kravis Children’s Hospital, New York, New York
| | - Susanne E. Tanski
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois;,Department of Pediatrics, Geisel School of Medicine, Dartmouth College, Lebanon, New Hampshire; and
| | - Joseph M. Collaco
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois;,Eudowood Division of Pediatric Respiratory Sciences, Department of Pediatrics, School of Medicine and
| | - Jonathan D. Klein
- Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Itasca, Illinois;,Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
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Seelan RS, Greene RM, Pisano MM. MicroRNAs as Epigenetic Targets of Cigarette Smoke During Embryonic Development. Microrna 2020; 9:168-173. [PMID: 31556862 PMCID: PMC7365999 DOI: 10.2174/2211536608666190926114704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/26/2019] [Accepted: 09/03/2019] [Indexed: 02/07/2023]
Abstract
The adverse developmental effects of exposure to Cigarette Smoke (CS) during pregnancy are documented in this paper. These include low birth weight, congenital anomalies, preterm birth, fetal mortality and morbidity. The current biological thought now recognizes that epigenetics represents a fundamental contributing process in embryogenesis, and that the environment can have a profound effect on shaping the epigenome. It has become increasingly recognized that genes encoding microRNAs (miRNAs) might be potential loci for congenital disabilities. One means by which CS can cause developmental anomalies may be through epigenetic mechanisms involving altered miRNA expression. While several studies have focused on genes affected by CS during embryonic/ fetal development, there is a paucity of knowledge on the involvement of miRNAs in this process. This brief review summarizes the current state of knowledge in this area.
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Affiliation(s)
- Ratnam S. Seelan
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies,
University of Louisville School of Dentistry, Louisville, KY40202, USA
| | - Robert M. Greene
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies,
University of Louisville School of Dentistry, Louisville, KY40202, USA
| | - Michele M. Pisano
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies,
University of Louisville School of Dentistry, Louisville, KY40202, USA
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13
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Nakagawa Kang J, Unnai Yasuda Y, Ogawa T, Sato M, Yamagata Z, Fujiwara T, Moriyama K. Association between Maternal Smoking during Pregnancy and Missing Teeth in Adolescents. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16224536. [PMID: 31744054 PMCID: PMC6888027 DOI: 10.3390/ijerph16224536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/12/2019] [Accepted: 11/13/2019] [Indexed: 11/16/2022]
Abstract
Tooth agenesis and disturbance of tooth eruption is the most prevalent oral defect, and is possibly caused by the interaction of genetic and environmental factors. We hypothesized that prenatal factors may affect tooth development. The objective of this study was to examine whether smoking during pregnancy was associated with missing teeth in the offspring during adolescence. The study population comprised pregnant women and their children registered (N = 1052) at Koshu city, Japan. When the expectant mothers visited the city office for pregnancy registration, a survey was conducted to ascertain their lifestyle habits. Data on missing teeth in the children were obtained from the compulsory dental health checkup during junior high school years. Multivariate logistic regression models were fitted to assess the association between missing teeth and lifestyle habits. A total of 772 children were studied. The prevalence of missing teeth in these children was 4.9%. Children whose mothers smoked six cigarettes or more per day were 4.59 (95% CI: 1.07-19.67) times more likely to present with missing teeth than those children whose mothers did not smoke, after adjustment for possible confounders. Our findings indicate that smoking during pregnancy can be a risk factor for missing teeth in the offspring.
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Affiliation(s)
- Junka Nakagawa Kang
- Department of Maxillofacial Orthognathics, Tokyo Medical and University, Tokyo 113-8510, Japan; (J.N.K.); (Y.U.Y.); (T.O.)
| | - Yuko Unnai Yasuda
- Department of Maxillofacial Orthognathics, Tokyo Medical and University, Tokyo 113-8510, Japan; (J.N.K.); (Y.U.Y.); (T.O.)
| | - Takuya Ogawa
- Department of Maxillofacial Orthognathics, Tokyo Medical and University, Tokyo 113-8510, Japan; (J.N.K.); (Y.U.Y.); (T.O.)
| | - Miri Sato
- Department of Health Sciences, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi 409-3898, Japan; (M.S.); (Z.Y.)
| | - Zentaro Yamagata
- Department of Health Sciences, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi 409-3898, Japan; (M.S.); (Z.Y.)
| | - Takeo Fujiwara
- Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
- Correspondence: (T.F.); (K.M.); Tel.: +81-3-5803-5187 (T.F.); +81-3-5803-5533 (K.M.)
| | - Keiji Moriyama
- Department of Maxillofacial Orthognathics, Tokyo Medical and University, Tokyo 113-8510, Japan; (J.N.K.); (Y.U.Y.); (T.O.)
- Correspondence: (T.F.); (K.M.); Tel.: +81-3-5803-5187 (T.F.); +81-3-5803-5533 (K.M.)
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14
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Wen X, Zhao WH, Chen LZ, Qu W, Liu HX, Yan HY, Hou LF, Ping J. Attenuated cholesterol metabolism pathway suppresses regulatory T cell development in prenatal nicotine exposed female mice. Toxicology 2019; 428:152309. [PMID: 31629012 DOI: 10.1016/j.tox.2019.152309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 10/10/2019] [Accepted: 10/15/2019] [Indexed: 12/21/2022]
Abstract
The recession of regulatory T cells (Tregs) contributes to development of autoimmune disease. Our previous study suggested that prenatal nicotine exposure (PNE) inhibited Tregs frequency in offspring, but the mechanisms are still uncertain. This study aimed to explore the molecular mechanisms of PNE-induced Tregs inhibition from the perspective of cellular cholesterol homeostasis both in vivo and in vitro. PNE mice model were established by 3 mg/kg/d nicotine administration in Balb/c strain from gestational day (GD) 9 to GD 18. The results showed that PNE significantly decreased thymic Tregs frequency in neonatal offspring. The activation of mTOR and downregulation of p-STAT5/Foxp3 pathway of Tregs were observed in PNE offspring. Mechanism study found that PNE elevated ATP-binding cassette transporter G1 (ABCG1) expression and decreased intracellular cholesterol content of Tregs in offspring, indicating impaired intracellular cholesterol homeostasis. Similar results were observed in 1 μM nicotine-treated primary thymocytes in vitro. Further, cholesterol-replenishment can abrogate nicotine-induced mTOR activation and the following suppression of p-STAT5/Foxp3 pathway and Tregs frequency. In addition, Abcg1 siRNA transfection can partly reverse the nicotine-decreased intracellular cholesterol content and cell frequency of Tregs. In conclusion, this study showed that PNE could suppress Tregs development in female mice by up-regulating ABCG1-dependent cholesterol efflux, and suggested that PNE-induced thymic Tregs recession of offspring at early life was the developmental origin mechanism of immune dysfunction in later life.
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Affiliation(s)
- Xiao Wen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Wen-Hao Zhao
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Lan-Zhou Chen
- Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University School of Resource and Environmental Sciences, Wuhan, 430079, China
| | - Wen Qu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Han-Xiao Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Hui-Yi Yan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Li-Fang Hou
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Jie Ping
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China.
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15
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Greene RM, Pisano MM. Developmental toxicity of e-cigarette aerosols. Birth Defects Res 2019; 111:1294-1301. [PMID: 31400084 DOI: 10.1002/bdr2.1571] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/07/2019] [Accepted: 07/19/2019] [Indexed: 12/21/2022]
Abstract
Maternal smoking during pregnancy represents a major public health concern increasing the risk for low birth weight, congenital anomalies, preterm birth, fetal mortality, and morbidity. In an effort to diminish adverse developmental effects of exposure to cigarette smoking, pregnant women, and women of reproductive age, are increasingly turning to electronic nicotine delivery systems (ENDS), such as e-cigarettes, as an alternative. Given that health risks associated with ENDS use during pregnancy are largely unknown, there is an acute need to determine risks vs. benefits of e-cigarette use by pregnant women. While the most recent Surgeon General's Report on the "Health Consequences of Smoking" states that "the evidence is sufficient to infer that nicotine adversely affects maternal and fetal health during pregnancy, contributing to multiple adverse outcomes," it remains unclear whether use of ENDS represents a "safer alternative" to tobacco smoking during pregnancy. This is due, in part, to the lack of sufficient and conclusive evidence concerning whether or not maternal e-cigarette use adversely affects embryonic/fetal development. While several recent developmental studies have challenged the safety of nicotine inhalation via ENDS, the true risks of smoking e-cigarettes during the first trimester of pregnancy-the period of organogenesis-are largely unknown. Moreover, evidence is emerging that even nicotine-free e-cigarette aerosols may harm the developing conceptus, suggesting that components of e-cigarette liquid, including flavorings, may be developmentally toxicity. Focused human epidemiological analyses, and carefully designed animal studies are critically needed to address the question of the safety of ENDS use during pregnancy.
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Affiliation(s)
- Robert M Greene
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, School of Dentistry, University of Louisville, Louisville, Kentucky, 40202
| | - M Michele Pisano
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, School of Dentistry, University of Louisville, Louisville, Kentucky, 40202
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16
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Durham E, Howie RN, Warren G, LaRue A, Cray J. Direct Effects of Nicotine Exposure on Murine Calvaria and Calvarial Cells. Sci Rep 2019; 9:3805. [PMID: 30846819 PMCID: PMC6405741 DOI: 10.1038/s41598-019-40796-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 02/22/2019] [Indexed: 01/03/2023] Open
Abstract
Despite the link between adverse birth outcomes due to pre- and peri-natal nicotine exposure, research suggests 11% of US women continue to smoke or use alternative nicotine products throughout pregnancy. Maternal smoking has been linked to incidence of craniofacial anomalies. We hypothesized that pre-natal nicotine exposure may directly alter craniofacial development independent of the other effects of cigarette smoking. To test this hypothesis, we administered pregnant C57BL6 mice drinking water supplemented with 0, 50, 100 or 200 μg/ml nicotine throughout pregnancy. On postnatal day 15 pups were sacrificed and skulls underwent micro-computed tomography (µCT) and histological analyses. Specific nicotinic acetylcholine receptors, α3, α7, β2, β4 were identified within the calvarial growth sites (sutures) and centers (synchondroses). Exposing murine calvarial suture derived cells and isotype cells to relevant circulating nicotine levels alone and in combination with nicotinic receptor agonist and antagonists resulted in cell specific effects. Most notably, nicotine exposure increased proliferation in calvarial cells, an effect that was modified by receptor agonist and antagonist treatment. Currently it is unclear what component(s) of cigarette smoke is causative in birth defects, however these data indicate that nicotine alone is capable of disrupting growth and development of murine calvaria.
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Affiliation(s)
- Emily Durham
- Department of Oral Health Sciences, Medical University of South Carolina, 173 Ashley Avenue, Charleston, SC, 29425, USA
| | - R Nicole Howie
- Department of Oral Health Sciences, Medical University of South Carolina, 173 Ashley Avenue, Charleston, SC, 29425, USA
| | - Graham Warren
- Departments of Radiation Oncology and Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue, Charleston, SC, 29425, USA
| | - Amanda LaRue
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, 173 Ashley Avenue, Charleston, SC, 29425, USA
- Ralph H. Johnson Veterans Administration Medical Center, 99 Jonathan Lucas Street, Charleston, SC, 29425, USA
| | - James Cray
- Department of Biomedical Education & Anatomy, The Ohio State University College of Medicine, 279 Hamilton Hall, 1645 Neil Ave, Columbus, Ohio, 43210, USA.
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17
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Weng M, Chen Z, Xiao Q, Li R, Chen Z. A review of FGF signaling in palate development. Biomed Pharmacother 2018; 103:240-247. [DOI: 10.1016/j.biopha.2018.04.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 04/01/2018] [Accepted: 04/03/2018] [Indexed: 11/25/2022] Open
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19
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Liu HX, Liu S, Qu W, Yan HY, Wen X, Chen T, Hou LF, Ping J. α7 nAChR mediated Fas demethylation contributes to prenatal nicotine exposure-induced programmed thymocyte apoptosis in mice. Oncotarget 2017; 8:93741-93756. [PMID: 29212186 PMCID: PMC5706832 DOI: 10.18632/oncotarget.21526] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 09/20/2017] [Indexed: 01/19/2023] Open
Abstract
This study aimed to investigate the effects of prenatal nicotine exposure (PNE) on thymocyte apoptosis and postnatal immune impairments in vivo and further explore the epigenetic mechanisms of the pro-apoptotic effect of nicotine in vitro. The results showed that PNE caused immune impairments in offspring on postnatal day 49, manifested as increased IL-4 production and an increased IgG1/IgG2a ratio in serum. Enhanced apoptosis of total and CD4+SP thymocytes was observed both in fetus and in offspring. Further, by exposing thymocytes to 0–100 μM of nicotine in vitro for 48 h, we found that nicotine increased α7 nicotinic acetylcholine receptor (nAChR) expression, activated the Fas apoptotic pathway, and promoted thymocyte apoptosis in concentration-dependent manners. In addition, nicotine could induce Tet methylcytosine dioxygenase (TET) 2 expression and Fas promoter demethylation, which can be abolished by TET2 siRNA transfection. Moreover, the α7 nAChR specific antagonist α-bungarotoxin can abrogate nicotine-induced TET2 increase, and the following Fas demethylation and Fas-mediated apoptosis. In conclusion, our findings showed, for the first time, that α7 nAChR activation could induce TET2-mediated Fas demethylation in thymocytes and results in the upregulation of Fas apoptotic pathway, which provide evidence for elucidating the PNE-induced programmed thymocyte apoptosis.
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Affiliation(s)
- Han-Xiao Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Sha Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Wen Qu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Hui-Yi Yan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Xiao Wen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Ting Chen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Li-Fang Hou
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Jie Ping
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
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Plausible Roles for RAGE in Conditions Exacerbated by Direct and Indirect (Secondhand) Smoke Exposure. Int J Mol Sci 2017; 18:ijms18030652. [PMID: 28304347 PMCID: PMC5372664 DOI: 10.3390/ijms18030652] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/07/2017] [Accepted: 03/14/2017] [Indexed: 02/07/2023] Open
Abstract
Approximately 1 billion people smoke worldwide, and the burden placed on society by primary and secondhand smokers is expected to increase. Smoking is the leading risk factor for myriad health complications stemming from diverse pathogenic programs. First- and second-hand cigarette smoke contains thousands of constituents, including several carcinogens and cytotoxic chemicals that orchestrate chronic inflammatory responses and destructive remodeling events. In the current review, we outline details related to compromised pulmonary and systemic conditions related to smoke exposure. Specifically, data are discussed relative to impaired lung physiology, cancer mechanisms, maternal-fetal complications, cardiometabolic, and joint disorders in the context of smoke exposure exacerbations. As a general unifying mechanism, the receptor for advanced glycation end-products (RAGE) and its signaling axis is increasingly considered central to smoke-related pathogenesis. RAGE is a multi-ligand cell surface receptor whose expression increases following cigarette smoke exposure. RAGE signaling participates in the underpinning of inflammatory mechanisms mediated by requisite cytokines, chemokines, and remodeling enzymes. Understanding the biological contributions of RAGE during cigarette smoke-induced inflammation may provide critically important insight into the pathology of lung disease and systemic complications that combine during the demise of those exposed.
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