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Huang T, Huang X, Li H, Qi J, Wang N, Xu Y, Zeng Y, Xiao X, Liu R, Chan YL, Oliver BG, Yi C, Li D, Chen H. Maternal Cigarette Smoke Exposure Exaggerates the Behavioral Defects and Neuronal Loss Caused by Hypoxic-Ischemic Brain Injury in Female Offspring. Front Cell Neurosci 2022; 16:818536. [PMID: 35250486 PMCID: PMC8894648 DOI: 10.3389/fncel.2022.818536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/25/2022] [Indexed: 11/13/2022] Open
Abstract
ObjectiveHypoxic-ischemic encephalopathy affects ∼6 in 1,000 preterm neonates, leading to significant neurological sequela (e.g., cognitive deficits and cerebral palsy). Maternal smoke exposure (SE) is one of the common causes of neurological disorders; however, female offspring seems to be less affected than males in our previous study. We also showed that maternal SE exaggerated neurological disorders caused by neonatal hypoxic-ischemic brain injury in adolescent male offspring. Here, we aimed to examine whether female littermates of these males are protected from such insult.MethodsBALB/c dams were exposed to cigarette smoke generated from 2 cigarettes twice daily for 6 weeks before mating, during gestation and lactation. To induce hypoxic-ischemic brain injury, half of the pups from each litter underwent left carotid artery occlusion, followed by exposure to 8% oxygen (92% nitrogen) at postnatal day (P) 10. Behavioral tests were performed at P40–44, and brain tissues were collected at P45.ResultsMaternal SE worsened the defects in short-term memory and motor function in females with hypoxic-ischemic injury; however, reduced anxiety due to injury was observed in the control offspring, but not the SE offspring. Both hypoxic-ischemic injury and maternal SE caused significant loss of neuronal cells and synaptic proteins, along with increased oxidative stress and inflammatory responses.ConclusionOxidative stress and inflammatory response due to maternal SE may be the mechanism of worsened neurological outcomes by hypoxic-ischemic brain injury in females, which was similar to their male littermates shown in our previous study.
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Affiliation(s)
- Taida Huang
- Department of Pathology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Xiaomin Huang
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Hui Li
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Junhua Qi
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Nan Wang
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yi Xu
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yunxin Zeng
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Xuewen Xiao
- Department of Pathology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Ruide Liu
- Department of Pathology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Yik Lung Chan
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Brian G. Oliver
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
- Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, Australia
| | - Chenju Yi
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
- *Correspondence: Chenju Yi,
| | - Dan Li
- Department of Pathology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Dan Li,
| | - Hui Chen
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
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Zeng Y, Huang T, Wang N, Xu Y, Sun C, Huang M, Chen C, Oliver BG, Yi C, Chen H. L-Leucine Improves Metabolic Disorders in Mice With in-utero Cigarette Smoke Exposure. Front Physiol 2021; 12:700246. [PMID: 34276421 PMCID: PMC8281970 DOI: 10.3389/fphys.2021.700246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 06/04/2021] [Indexed: 01/18/2023] Open
Abstract
Objectives: Maternal cigarette smoke exposure (SE) causes intrauterine undernutrition, resulting in increased risk for metabolic disorders and type 2 diabetes in the offspring without sex differences. L-leucine supplementation has been shown to reduce body weight and improve glucose metabolism in both obese animals and humans. In this study, we aimed to determine whether postnatal L-leucine supplementation in female offspring can ameliorate the detrimental impact of maternal SE. Methods: Female Balb/c mice (6-week) were exposed to cigarette smoke (SE, 2 cigarettes/day) prior to mating for 5 weeks until the pups weaned. Sham dams were exposed to air during the same period. Half of the female offspring from the SE and SHAM dams were supplied with L-leucine via drinking water (1.5% w/w) after weaning (21-day) for 10 weeks and sacrificed at 13 weeks (adulthood). Results: Maternal SE during pregnancy resulted in smaller body weight and glucose intolerance in the offspring. L-leucine supplement in Sham offspring reduced body weight, fat mass, and fasting blood glucose levels compared with their untreated littermates; however somatic growth was not changed. L-leucine supplement in SE offspring improved glucose tolerance and reduced fat mass compared with untreated littermates. Conclusions: Postnatal L-leucine supplement could reduce fat accumulation and ameliorate glucose metabolic disorder caused by maternal SE. The application of leucine may provide a potential strategy for reducing metabolic disorders in offspring from mothers who continued to smoke during pregnancy.
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Affiliation(s)
- Yunxin Zeng
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Taida Huang
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Nan Wang
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yi Xu
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Chunhui Sun
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Min Huang
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Chun Chen
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Brian G Oliver
- Faculty of Science, School of Life Sciences, University of Technology Sydney, NSW, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, Sydney, NSW, Australia
| | - Chenju Yi
- Research Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Hui Chen
- Faculty of Science, School of Life Sciences, University of Technology Sydney, NSW, Australia
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Chen H, Oliver BG, Pant A, Olivera A, Poronnik P, Pollock CA, Saad S. Particulate Matter, an Intrauterine Toxin Affecting Foetal Development and Beyond. Antioxidants (Basel) 2021; 10:antiox10050732. [PMID: 34066412 PMCID: PMC8148178 DOI: 10.3390/antiox10050732] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/30/2021] [Accepted: 05/02/2021] [Indexed: 02/07/2023] Open
Abstract
Air pollution is the 9th cause of the overall disease burden globally. The solid component in the polluted air, particulate matters (PMs) with a diameter of 2.5 μm or smaller (PM2.5) possess a significant health risk to several organ systems. PM2.5 has also been shown to cross the blood–placental barrier and circulate in foetal blood. Therefore, it is considered an intrauterine environmental toxin. Exposure to PM2.5 during the perinatal period, when the foetus is particularly susceptible to developmental defects, has been shown to reduce birth weight and cause preterm birth, with an increase in adult disease susceptibility in the offspring. However, few studies have thoroughly studied the health outcome of foetuses due to intrauterine exposure and the underlying mechanisms. This perspective summarises currently available evidence, which suggests that intrauterine exposure to PM2.5 promotes oxidative stress and inflammation in a similar manner as occurs in response to direct PM exposure. Oxidative stress and inflammation are likely to be the common mechanisms underlying the dysfunction of multiple systems, offering potential targets for preventative strategies in pregnant mothers for an optimal foetal outcome.
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Affiliation(s)
- Hui Chen
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia; (B.G.O.); (A.O.)
- Correspondence: (H.C.); (S.S.)
| | - Brian G. Oliver
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia; (B.G.O.); (A.O.)
| | - Anushriya Pant
- School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia; (A.P.); (P.P.)
| | - Annabel Olivera
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia; (B.G.O.); (A.O.)
| | - Philip Poronnik
- School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia; (A.P.); (P.P.)
| | - Carol A. Pollock
- Renal Research Laboratory, Kolling Institute of Medical Research, Sydney, NSW 2065, Australia;
| | - Sonia Saad
- Renal Research Laboratory, Kolling Institute of Medical Research, Sydney, NSW 2065, Australia;
- Correspondence: (H.C.); (S.S.)
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Wang B, Chan YL, Zhou S, Saad S, Chen H, Oliver BG. Offspring sex affects the susceptibility to maternal smoking-induced lung inflammation and the effect of maternal antioxidant supplementation in mice. JOURNAL OF INFLAMMATION-LONDON 2020; 17:24. [PMID: 32774172 PMCID: PMC7409429 DOI: 10.1186/s12950-020-00253-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 07/30/2020] [Indexed: 02/08/2023]
Abstract
Background Cigarette smoke exposure (SE) during pregnancy is the largest modifiable risk factor for the development of lung disorders in offspring. We have previously shown that maternal L-Carnitine treatment can reduce the adverse impacts of maternal SE on renal and brain disorders in offspring. Here, we investigated the effect of maternal L-Carnitine supplementation on lung inflammatory pathways, autophagy, and mitophagy markers in the offspring in response to maternal SE. Methods Female BALB/c mice (8 weeks) were exposed to cigarette smoke for 6 weeks prior to mating, during gestation and lactation. Some of the SE dams were given L-Carnitine supplementation (1.5 mM in drinking water, SE + LC) during gestation and lactation. Lungs from the offspring were studied at birth and adulthood (13 weeks). Results At birth, in male offspring, there were increased levels of inflammatory markers (phosphorylated(p)-ERK1,2, p-P38 MAPK, p- NF-κB), and inflammasome marker (NLRP3), as well as mitophagy fission marker Drp-1 and autophagosome marker (LC3A/B-II) in the lung. Maternal L-Carnitine supplementation significantly reduced NLRP3 level. In contrast, maternal SE only increased IL1-β in female offspring, which was reversed by maternal L-Carnitine supplementation. At 13 weeks, there was an increase in LC3A/B-II and p- NF-κB in the male SE offspring with reduced p-JNK1,2, which were partially normalised by maternal L-Carnitine treatment. Female offspring were not affected by maternal SE at this age. Conclusion Maternal SE had adverse impacts on the male offspring’s lung, which were partially alleviated by maternal L-Carnitine supplementation. Females seem to be less affected by the adverse effects of maternal SE.
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Affiliation(s)
- Baoming Wang
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007 Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW 2037 Australia
| | - Yik Lung Chan
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007 Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW 2037 Australia
| | - Shengyu Zhou
- School of Nursing, Shandong University, Jinan, 250012 Shandong China.,Department of Pulmonary Medicine, Qilu Hospital of Shandong University, Jinan, 250012 Shandong China
| | - Sonia Saad
- Renal Group Kolling Institute, Royal North Shore Hospital, St Leonards, NSW 2065 Australia
| | - Hui Chen
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007 Australia
| | - Brian G Oliver
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007 Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW 2037 Australia
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Short-term E-cigarette toxicity effects on brain cognitive memory functions and inflammatory responses in mice. Toxicol Res 2020; 36:267-273. [PMID: 32685431 DOI: 10.1007/s43188-019-00031-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 11/05/2019] [Accepted: 12/06/2019] [Indexed: 12/18/2022] Open
Abstract
Exposure to cigarette smoke (CS) is associated with an increased risk of several neurological diseases such as stroke, Alzheimer's disease, and dementia. At present, commercialization of E-cigarettes (ECs) is increasing, and they are advertised as a less harmful nicotine-delivery system. There are, however, limited studies regarding the neurotoxicity effects of ECs on the brain, which remains a subject of debate. In the present study, we aimed to evaluate the in vivo effects of short-term EC vapor exposure on the brain and compare them with the effects of cigarette smoke (CS). BALB/c mice were exposed to air, CS, and EC for 14 days. We then assessed the inflammatory responses, oxidative stress, and cognitive functions of the mice by using maze tests. Cognitive spatial tests showed that the mice exposed to CS and ECs had delayed time in finding food rewards. EC exposure demonstrated no improvement in spatial memory learning to find the food reward on the next day. This implies that CS and EC exposure possibly causes damage to the olfactory system. Notably, EC exposure potentially causes abnormalities in mice memory functions. Histological staining of the cerebral cortex of mice brain in the EC-exposed group demonstrated inflammatory responses such as necrosis and cytoplasm vacuolization. Immunohistochemical staining revealed high expression of proinflammatory cytokine TNF-α in both the EC- and CS-exposed groups. Hence, we conclude that ECs share similar toxicity profiles as CS, which potentially negatively impact brain function.
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Chan YL, Oliver BG, Chen H. What lessons have we learnt about the impact of maternal cigarette smoking from animal models? Clin Exp Pharmacol Physiol 2019; 47:337-344. [PMID: 31556137 DOI: 10.1111/1440-1681.13182] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 09/04/2019] [Accepted: 09/18/2019] [Indexed: 12/17/2022]
Abstract
Maternal first- or second-hand tobacco smoking during pregnancy is still common albeit that the detrimental effects to the unborn child are well known. Maternal tobacco cigarette smoking can affect multiple organ systems in the offspring, rendering them at increased risk of various conditions throughout life (eg. intrauterine underdevelopment, asthma, substance abuse, diabetes). However, this review will only focus on its impact on the brain and the related molecular changes in the offspring based on evidence from animal studies. Although epidemiological studies have identified the associations between maternal cigarette smoke exposure (SE) and brain disorders, animal models can help identify the underlying mechanisms and test interventions. Human studies have found that maternal SE is closely linked to small brain size and changes in brain structure and associated with a high risk of cognitive defects. Animal models suggest that this may be due to increased brain oxidative stress and inflammation during the neonatal period, leading to increased brain cell apoptosis in adulthood. There is a distinct gender bias of such impacts, where male offspring are more affected than females. Female offspring seem to have developed the adaptation by increasing endogenous antioxidant levels. Indeed, animal studies have shown that using antioxidant supplementation during pregnancy can improve neurological outcomes in male offspring, however, the efficacy in humans is yet to be confirmed. Furthermore, some animal studies suggested nicotine as the key player in intrauterine underdevelopment due to maternal SE, while human clinical trials using nicotine replacement therapy do not support this mechanism. This review will discuss the possible reasons.
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Affiliation(s)
- Yik L Chan
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, Sydney, Australia
| | - Brian G Oliver
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, Sydney, Australia
| | - Hui Chen
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, Australia.,Faculty of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Machaalani R, Thawley M, Huang J, Chen H. Effects of prenatal cigarette smoke exposure on BDNF, PACAP, microglia and gliosis expression in the young male mouse brainstem. Neurotoxicology 2019; 74:40-46. [PMID: 31121239 DOI: 10.1016/j.neuro.2019.05.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 05/16/2019] [Accepted: 05/18/2019] [Indexed: 01/17/2023]
Abstract
Cigarette smoke exposure during pregnancy into infancy affects brain growth and development in both short and long term (into adulthood). Using a mouse model of pre- into post- natal cigarette smoke exposure (SE), we aimed to determine the effects on brain derived neurotrophic factor (BDNF) and its receptor TrkB, neuropeptide pituitary adenylate cyclase activating polypeptide (PACAP) and its receptor PAC1, and astrocyte (GFAP) and microglia (Iba-1) immunohistochemical expression, in seven nuclei of the medulla and the facial (FAC) nucleus of the pons. Male pups of dams exposed to two cigarettes (nicotine <1.2 mg, CO <15 mg) twice daily for six weeks prior to mating, during gestation and lactation (n = 5; SE), were compared to pups exposed to air under the same condition (n = 5; SHAM) at postnatal day 20. Expression changes were only evident for BDNF, TrkB and PAC1 and included decreased BDNF in the hypoglossal (XII) nucleus and nucleus of the solitary tract (NTS), increased TrkB in XII but decreased TrkB in the FAC, and increased PAC1 in 4 nuclei of the medulla including the NTS. These results suggest that the effect of SE on the brainstem are region and marker selective, affecting regions of respiratory control (XII and NTS), and restricted to the BDNF system and PAC1, with no effect on activation states of astrocytes or microglia.
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Affiliation(s)
- Rita Machaalani
- SIDS and Sleep Apnea Laboratory, Sydney Medical School (Central), Medical Foundation Building, K25, University of Sydney, NSW, 2006, Australia.
| | - Melisande Thawley
- SIDS and Sleep Apnea Laboratory, Sydney Medical School (Central), Medical Foundation Building, K25, University of Sydney, NSW, 2006, Australia
| | - Jessica Huang
- SIDS and Sleep Apnea Laboratory, Sydney Medical School (Central), Medical Foundation Building, K25, University of Sydney, NSW, 2006, Australia
| | - Hui Chen
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Broadway, NSW, 2007, Australia
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Stangenberg S, Nguyen LT, Chan YL, Zaky A, Pollock CA, Chen H, Saad S. Maternal L-carnitine supplementation ameliorates renal underdevelopment and epigenetic changes in male mice offspring due to maternal smoking. Clin Exp Pharmacol Physiol 2018; 46:183-193. [PMID: 30290012 DOI: 10.1111/1440-1681.13038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 09/18/2018] [Accepted: 09/27/2018] [Indexed: 01/02/2023]
Abstract
OBJECTIVES Epidemiological and animal studies showed that L-carnitine (LC) supplementation can ameliorate oxidative stress-induced tissues damage. We have previously shown that maternal cigarette smoke exposure (SE) can increase renal oxidative stress in newborn offspring with postnatal kidney underdevelopment and renal dysfunction in adulthood, which were normalised by LC administration in the SE dams during pregnancy. Exposure to an adverse intrauterine environment may lead to alteration in the epigenome, a mechanism by which adverse prenatal conditions increase the susceptibility to chronic disease later in life. The current study aimed to determine whether maternal SE induces epigenetic changes in the offspring's kidney are associated with renal underdevelopment, and the protective effect of maternal LC supplementation. METHOD Female Balb/c mice (7 weeks) were exposed to cigarette smoke (SE) or air (Sham) for 6 weeks prior to mating, during gestation and lactation. A subgroup of the SE dams received LC via drinking water (SE + LC, 1.5 mmol/L) throughout gestation and lactation. Male offspring were studied at postnatal day (P)1, P20, and 13 weeks. RESULTS Maternal SE altered the expression of renal development markers glial cell line-derived neurotrophic factor and fibroblast growth factor 2, which were associated with increased renal global DNA methylation and DNA methyltransferase 1 mRNA expression at birth. These disorders were reversed by maternal LC administration. CONCLUSION The effect of maternal SE on renal underdevelopment involves global epigenetic alterations from birth, which can be prevented by maternal LC supplementation.
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Affiliation(s)
- Stefanie Stangenberg
- Renal Group, Kolling Institute of Medical Research, Royal North Shore Hospital, Sydney, New South Wales, Australia
| | - Long The Nguyen
- Renal Group, Kolling Institute of Medical Research, Royal North Shore Hospital, Sydney, New South Wales, Australia
| | - Yik Lung Chan
- RCMB, Woolcock Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Amgad Zaky
- Renal Group, Kolling Institute of Medical Research, Royal North Shore Hospital, Sydney, New South Wales, Australia
| | - Carol A Pollock
- Renal Group, Kolling Institute of Medical Research, Royal North Shore Hospital, Sydney, New South Wales, Australia
| | - Hui Chen
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Sonia Saad
- Renal Group, Kolling Institute of Medical Research, Royal North Shore Hospital, Sydney, New South Wales, Australia.,Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
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Vlahos R. E-Cigarettes: Inducing Inflammation that Spans Generations. Am J Respir Cell Mol Biol 2018; 58:286-287. [PMID: 29493321 DOI: 10.1165/rcmb.2017-0306ed] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Ross Vlahos
- 1 School of Health and Biomedical Sciences RMIT University Bundoora, Australia
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10
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Chen H, Li G, Chan YL, Nguyen T, van Reyk D, Saad S, Oliver BG. Modulation of neural regulators of energy homeostasis, and of inflammation, in the pups of mice exposed to e-cigarettes. Neurosci Lett 2018; 684:61-66. [PMID: 29981356 DOI: 10.1016/j.neulet.2018.07.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/20/2018] [Accepted: 07/02/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND Maternal smoking can lead to perturbations in central metabolic regulators such as neuropeptide Y (NPY) and pro-opiomelanocortin (POMC) signalling components in offspring. With the growing interest in e-cigarettes as a tobacco replacement, this short report assessed central metabolic regulation in offspring of mouse dams exposed to e-cigarettes. We examined the impact of continuous use of e-cigarettes, and e-cigarette replacement of tobacco cigarettes during pregnancy. Supplementation of an antioxidant l-carnitine was also co-used with tobacco cigarette in the mother to determine whether the impact of maternal tobacco smoking was oxidative stress driven. METHODS Balb/c mice were exposed to either nicotine-containing (E-cig18) or nicotine-free (E-cig0) e-cigarette aerosols or tobacco smoke (SE) prior to mating and until their pups were weaned. After mating, two SE sub-groups were changed to E-cig18 exposure (Replacement), or supplementation l-carnitine while SE was continued. Male offspring were studied at weaning age. RESULTS The offspring of E-cig0 dams were the heaviest with the most body fat. Replacing SE with E-cig18 during pregnancy resulted in offspring with significantly less body fat. E-cig0 offspring had significantly increased mRNA expression of brain NPY and iNOS. Maternal SE upregulated mRNA expression of NPY, NPY Y1 receptor, POMC downstream components, and iNOS expression, which were normalised in Replacement offspring, but only partially normalised with maternal L-carnitine supplementation during gestation and lactation. CONCLUSIONS Maternal exposure to either tobacco and nicotine-free e-cigarettes lead to disturbances in the level of central homeostatic control markers in offspring, suggesting that maternal exposure to e-cigarettes is not without risks.
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Affiliation(s)
- Hui Chen
- School of Life Sciences & Centre for Health Technologies, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia; Faculty of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, 610072, China
| | - Gerard Li
- School of Life Sciences & Centre for Health Technologies, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Yik Lung Chan
- Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, NSW, 2037, Australia
| | - Tara Nguyen
- School of Life Sciences & Centre for Health Technologies, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - David van Reyk
- School of Life Sciences & Centre for Health Technologies, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Sonia Saad
- School of Life Sciences & Centre for Health Technologies, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia; Renal Group, Kolling Institute of Medical Research, Royal North Shore Hospital, The University of Sydney, NSW, 2065, Australia
| | - Brian G Oliver
- School of Life Sciences & Centre for Health Technologies, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia; Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, NSW, 2037, Australia.
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Nguyen T, Li GE, Chen H, Cranfield CG, McGrath KC, Gorrie CA. Maternal E-Cigarette Exposure Results in Cognitive and Epigenetic Alterations in Offspring in a Mouse Model. Chem Res Toxicol 2018; 31:601-611. [PMID: 29863869 DOI: 10.1021/acs.chemrestox.8b00084] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electronic cigarette (e-cigarette) use is on the rise worldwide and is particularly attractive to young people and as a smoking substitute by pregnant woman. There is a perception in pregnant women and women of child-bearing age that the use of e-cigarettes (vaping) is safer than smoking tobacco cigarettes during pregnancy. However, there is little evidence to support this perception. Here, we examined the offspring from mouse dams that had been exposed during and after pregnancy to ambient air (sham) ( n = 8), e-cigarette aerosols with nicotine ( n = 8), or e-cigarette aerosols without nicotine ( n = 8). Offspring underwent cognitive testing at 12 weeks of age and epigenetic testing of brain tissues at 1 day, 20 days, and 13 weeks after birth. The findings showed deficits in short-term memory, reduced anxiety, and hyperactivity in offspring following maternal e-cigarette exposure using the novel object recognition and elevated plus maze tests. In addition, global DNA methylation was increased in the brains of offspring soon after birth. Using a quantitative-PCR array specific to chromatin modification enzymes on genomic DNA and histones,13 key genes were identified to be significantly altered in the offspring brains from the e-cigarette groups compared to the nonexposed groups. The changes to genes Aurka, Aurkb, Aurkc, Kdm5c, Kdm6b, Dnmt3a, Dnmt3b, and Atf2, all associated with modulating neurological activity, were validated using RT-qPCR. In conclusion, in a mouse model, maternal exposure to e-cigarette aerosols resulted in both cognitive and epigenetic changes in offspring. This suggests that the use of e-cigarettes during pregnancy may have hitherto undetected neurological consequences on newborns.
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Affiliation(s)
- Tara Nguyen
- School of Life Sciences, Faculty of Science , University of Technology Sydney , Sydney , New South Wales , Australia
| | - Gerard E Li
- School of Life Sciences, Faculty of Science , University of Technology Sydney , Sydney , New South Wales , Australia
| | - Hui Chen
- School of Life Sciences, Faculty of Science , University of Technology Sydney , Sydney , New South Wales , Australia
| | - Charles G Cranfield
- School of Life Sciences, Faculty of Science , University of Technology Sydney , Sydney , New South Wales , Australia
| | - Kristine C McGrath
- School of Life Sciences, Faculty of Science , University of Technology Sydney , Sydney , New South Wales , Australia
| | - Catherine A Gorrie
- School of Life Sciences, Faculty of Science , University of Technology Sydney , Sydney , New South Wales , Australia
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Sukjamnong S, Chan YL, Zakarya R, Nguyen LT, Anwer AG, Zaky AA, Santiyanont R, Oliver BG, Goldys E, Pollock CA, Chen H, Saad S. MitoQ supplementation prevent long-term impact of maternal smoking on renal development, oxidative stress and mitochondrial density in male mice offspring. Sci Rep 2018; 8:6631. [PMID: 29700332 PMCID: PMC5919980 DOI: 10.1038/s41598-018-24949-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 03/26/2018] [Indexed: 12/18/2022] Open
Abstract
To investigate the effect of maternal MitoQ treatment on renal disorders caused by maternal cigarette smoke exposure (SE). We have demonstrated that maternal SE during pregnancy increases the risk of developing chronic kidney disease (CKD) in adult offspring. Mitochondrial oxidative damage contributes to the adverse effects of maternal smoking on renal disorders. MitoQ is a mitochondria-targeted antioxidant that has been shown to protect against oxidative damage-related pathologies in many diseases. Female Balb/c mice (8 weeks) were divided into Sham (exposed to air), SE (exposed to cigarette smoke) and SEMQ (exposed to cigarette smoke with MitoQ supplemented from mating) groups. Kidneys from the mothers were collected when the pups weaned and those from the offspring were collected at 13 weeks. Maternal MitoQ supplementation during gestation and lactation significantly reversed the adverse impact of maternal SE on offspring’s body weight, kidney mass and renal pathology. MitoQ administration also significantly reversed the impact of SE on the renal cellular mitochondrial density and renal total reactive oxygen species in both the mothers and their offspring in adulthood. Our results suggested that MitoQ supplementation can mitigate the adverse impact of maternal SE on offspring’s renal pathology, renal oxidative stress and mitochondrial density in mice offspring.
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Affiliation(s)
- Suporn Sukjamnong
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.,Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Yik Lung Chan
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, Sydney, NSW, 2037, Australia
| | - Razia Zakarya
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, Sydney, NSW, 2037, Australia
| | - Long The Nguyen
- Renal group Kolling Institute, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia
| | - Ayad G Anwer
- ARC Centre of Excellence for Nanoscale Biophotonics, Macquarie University, North Ryde, 2109, NSW, Australia
| | - Amgad A Zaky
- Renal group Kolling Institute, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia
| | - Rachana Santiyanont
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Brian G Oliver
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, Sydney, NSW, 2037, Australia
| | - Ewa Goldys
- ARC Centre of Excellence for Nanoscale Biophotonics, Macquarie University, North Ryde, 2109, NSW, Australia
| | - Carol A Pollock
- Renal group Kolling Institute, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia
| | - Hui Chen
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Sonia Saad
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia. .,Renal group Kolling Institute, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia.
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Saad S, Al-Odat I, Chan YL, McGrath KC, Pollock CA, Oliver BG, Chen H. Maternal L-carnitine supplementation improves glucose and lipid profiles in female offspring of dams exposed to cigarette smoke. Clin Exp Pharmacol Physiol 2018; 45:694-703. [DOI: 10.1111/1440-1681.12921] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 01/08/2018] [Accepted: 01/17/2018] [Indexed: 02/06/2023]
Affiliation(s)
- S Saad
- School of Life Sciences; Faculty of Science; University of Technology Sydney; Broadway NSW Australia
- Kolling Institute of Medical Research; Royal North Shore Hospital; Sydney NSW Australia
| | - I Al-Odat
- School of Life Sciences; Faculty of Science; University of Technology Sydney; Broadway NSW Australia
- Department of Medical Analysis; Faculty of Pharmacy; Jadara University; Irbid Jordan
| | - YL Chan
- School of Life Sciences; Faculty of Science; University of Technology Sydney; Broadway NSW Australia
- RCMB; Woolcock Institute of Medical Research; The University of Sydney; Sydney NSW Australia
| | - KC McGrath
- School of Life Sciences; Faculty of Science; University of Technology Sydney; Broadway NSW Australia
| | - CA Pollock
- Kolling Institute of Medical Research; Royal North Shore Hospital; Sydney NSW Australia
| | - BG Oliver
- School of Life Sciences; Faculty of Science; University of Technology Sydney; Broadway NSW Australia
- RCMB; Woolcock Institute of Medical Research; The University of Sydney; Sydney NSW Australia
| | - H Chen
- School of Life Sciences; Faculty of Science; University of Technology Sydney; Broadway NSW Australia
- Faculty of Basic Medical Sciences; Chengdu University of Traditional Chinese Medicine; Chengdu Sichuan China
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Chan YL, Saad S, Machaalani R, Oliver BG, Vissel B, Pollock C, Jones NM, Chen H. Maternal Cigarette Smoke Exposure Worsens Neurological Outcomes in Adolescent Offspring with Hypoxic-Ischemic Injury. Front Mol Neurosci 2017; 10:306. [PMID: 29018327 PMCID: PMC5623008 DOI: 10.3389/fnmol.2017.00306] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 09/11/2017] [Indexed: 12/22/2022] Open
Abstract
Hypoxic-ischemic (HI) encephalopathy occurs in approximately 6 per 1000 term newborns leading to devastating neurological consequences, such as cerebral palsy and seizures. Maternal smoking is one of the prominent risk factors contributing to HI injury. Mitochondrial integrity plays a critical role in neural injury and repair during HI. We previously showed that maternal cigarette smoke exposure (SE) can reduce brain mitochondrial fission and autophagosome markers in male offspring. This was accompanied by increased brain cell apoptosis (active caspase-3) and DNA fragmentation (TUNEL staining). Here, we aimed to investigate whether maternal SE leads to more severe neurological damage after HI brain injury in male offspring. Female BALB/c mice (8 weeks) were exposed to cigarette smoke prior to mating, during gestation, and lactation. At postnatal day 10, half of the pups from each litter underwent left carotid artery occlusion, followed by exposure to 8% oxygen (92% nitrogen). At postnatal day 40-44, maternal SE reduced grip strength in grip traction and foot fault tests, which were also reduced by HI injury to similar levels regardless of the maternal group. Limb coordination was impaired by maternal SE which was not worsened by HI injury. Maternal SE increased anxiety level in the offspring, which was normalized by HI injury. Apoptosis markers were increased in different brain regions by maternal SE, with the cortex having further increased TUNEL by HI injury, along with increased markers of inflammation and mitophagy. We conclude that maternal SE can worsen HI-induced cellular damage in male offspring well into adolescence.
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Affiliation(s)
- Yik L Chan
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
| | - Sonia Saad
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia.,Renal Research Group, Kolling Institute, Royal North Shore Hospital, St. Leonards, NSW, Australia
| | - Rita Machaalani
- Department of Medicine, University of Sydney, Sydney, NSW, Australia
| | - Brian G Oliver
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia.,Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
| | - Bryce Vissel
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia.,Centre for Neuroscience and Regenerative Medicine, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Carol Pollock
- Renal Research Group, Kolling Institute, Royal North Shore Hospital, St. Leonards, NSW, Australia
| | - Nicole M Jones
- Department of Pharmacology, School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Hui Chen
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
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Chan YL, Saad S, Al-Odat I, Oliver BG, Pollock C, Jones NM, Chen H. Maternal L-Carnitine Supplementation Improves Brain Health in Offspring from Cigarette Smoke Exposed Mothers. Front Mol Neurosci 2017; 10:33. [PMID: 28243190 PMCID: PMC5303734 DOI: 10.3389/fnmol.2017.00033] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 01/27/2017] [Indexed: 02/04/2023] Open
Abstract
Maternal cigarette smoke exposure (SE) causes detrimental changes associated with the development of chronic neurological diseases in the offspring as a result of oxidative mitochondrial damage. Maternal L-Carnitine administration has been shown to reduce renal oxidative stress in SE offspring, but its effect in the brain is unknown. Here, we investigated the effects of maternal L-Carnitine supplementation on brain markers of oxidative stress, autophagy, mitophagy and mitochondrial energy producing oxidative phosphorylation (OXPHOS) complexes in SE offspring. Female Balb/c mice (8 weeks) were exposed to cigarette smoke prior to mating, during gestation and lactation with or without L-Carnitine supplementation (1.5 mM in drinking water). In 1 day old male SE offspring, brain mitochondrial damage was suggested by increased mitochondrial fusion and reduced autophagosome markers; whereas at 13 weeks, enhanced brain cell damage was suggested by reduced fission and autophagosome markers, as well as increased apoptosis and DNA fragmentation markers, which were partially reversed by maternal L-Carnitine supplementation. In female SE offspring, enhanced mitochondrial regeneration was suggested by decreased fission and increased fusion markers at day 1. At 13 weeks, there was an increase in brain energy demand, oxidative stress and mitochondrial turnover, reflected by the protein changes of OXPHOS complex, fission and autophagosome markers, as well as the endogenous antioxidant, which were also partially normalized by maternal L-Carnitine supplementation. However, markers of apoptosis and DNA fragmentation were not significantly changed. Thus L-Carnitine supplementation may benefit the brain health of the offspring from smoking mothers.
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Affiliation(s)
- Yik Lung Chan
- Center for Health Technologies, School of Life Sciences, Faculty of Science, University of Technology SydneyUltimo, NSW, Australia; Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of SydneyGlebe, NSW, Australia
| | - Sonia Saad
- Center for Health Technologies, School of Life Sciences, Faculty of Science, University of Technology SydneyUltimo, NSW, Australia; Renal Group Kolling Institute, Royal North Shore HospitalSt Leonards, NSW, Australia
| | - Ibrahim Al-Odat
- Center for Health Technologies, School of Life Sciences, Faculty of Science, University of Technology Sydney Ultimo, NSW, Australia
| | - Brian G Oliver
- Center for Health Technologies, School of Life Sciences, Faculty of Science, University of Technology SydneyUltimo, NSW, Australia; Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of SydneyGlebe, NSW, Australia
| | - Carol Pollock
- Renal Group Kolling Institute, Royal North Shore Hospital St Leonards, NSW, Australia
| | - Nicole M Jones
- Department of Pharmacology, School of Medical Sciences, University of New South Wales Kensington, NSW, Australia
| | - Hui Chen
- Center for Health Technologies, School of Life Sciences, Faculty of Science, University of Technology Sydney Ultimo, NSW, Australia
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