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Ninomiya A, Amano I, Suzuki H, Fujiwara Y, Haijima A, Koibuchi N. Lactational exposure to perfluorooctane sulfonate remains a potential risk in brain function of middle-aged male mice. J Physiol Sci 2024; 74:15. [PMID: 38443820 DOI: 10.1186/s12576-024-00907-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 02/22/2024] [Indexed: 03/07/2024]
Abstract
Perfluorooctane sulfonate (PFOS) exerts adverse effects on neuronal development in young population. Limited evidences have shown that early-life PFOS exposure holds a potential risk for developing age-related neurodegenerative diseases such as Alzheimer's disease later in life. The present study investigated the effects of lactational PFOS exposure on cognitive function using one-year-old mice. Dams were exposed to PFOS (1 mg/kg body weight) through lactation by gavage. Male offspring were used for the behavior test battery to assess cognitive function. Western blot analysis was conducted to measure the levels of proteins related to the pathogenesis of Alzheimer's disease. PFOS-exposed mice displayed a mild deficiency in social recognition. In the hippocampus, the expression of tau protein was significantly increased. These results underline a mild effect of developing PFOS exposure on cognitive function and neurodegeneration. The present study presents the long-lasting effects of PFOS in middle-aged period and warrants a potential aftermath.
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Affiliation(s)
- Ayane Ninomiya
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Izuki Amano
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiraku Suzuki
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Yuki Fujiwara
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Asahi Haijima
- Department of Environmental Brain Science, Faculty of Human Sciences, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, 359-1192, Japan.
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma, 371-8511, Japan.
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Ninomiya A, Mshaty A, Haijima A, Yajima H, Kokubo M, Khairinisa MA, Ariyani W, Fujiwara Y, Ishii S, Hosoi N, Hirai H, Amano I, Koibuchi N. The neurotoxic effect of lactational PFOS exposure on cerebellar functional development in male mice. Food Chem Toxicol 2021; 159:112751. [PMID: 34871666 DOI: 10.1016/j.fct.2021.112751] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/15/2021] [Accepted: 12/01/2021] [Indexed: 01/09/2023]
Abstract
Recent studies showed a possible association between perfluorooctane sulfonate (PFOS) and developmental disabilities. We previously found the specific effects of PFOS exposure on learning and memory, however, its effect on the other developmental disabilities such as motor and social deficits remains unclear. We examined the effect of early lactational PFOS exposure on motor coordination, social activity, and anxiety in male mice. We orally administered a PFOS solution to dams from postnatal day 1-14. At 10 weeks old, we conducted a behavior test battery to evaluate motor performance, social activity, and anxiety, followed by electrophysiology and Western blot analysis. PFOS-exposed mice displayed impaired motor coordination. Whole-cell patch-clamp recordings from Purkinje cells revealed that the short-term and long-term plasticity at parallel fiber-Purkinje cell synapses are affected by PFOS exposure. Western blot analysis indicated that PFOS exposure increased syntaxin binding protein 1 (Munc18-1) and glutamate metabotropic receptor 1 (mGluR1) protein levels, which may be associated with the change in neurotransmitter release from parallel fibers and the level of long-term depression, respectively. The present study demonstrates that lactational PFOS exposure may have disrupted the pre- and postsynaptic plasticity at parallel fiber-Purkinje cell synapses, causing profound, long-lasting abnormal effects on the cerebellar function.
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Affiliation(s)
- Ayane Ninomiya
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Abdallah Mshaty
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Asahi Haijima
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan; Laboratory for Environmental Brain Science, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan
| | - Hiroyuki Yajima
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Michifumi Kokubo
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Miski Aghnia Khairinisa
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan; Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung Sumedang KM.21, Hegarmanah, Jatinangor, Sumedang, West Java, 45363, Indonesia
| | - Winda Ariyani
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Yuki Fujiwara
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Sumiyasu Ishii
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Nobutake Hosoi
- Department of Neurophysiology and Neural Repair, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Hirokazu Hirai
- Department of Neurophysiology and Neural Repair, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Izuki Amano
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan.
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan.
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Mshaty A, Haijima A, Takatsuru Y, Ninomiya A, Yajima H, Kokubo M, Khairinisa MA, Miyazaki W, Amano I, Koibuchi N. Neurotoxic effects of lactational exposure to perfluorooctane sulfonate on learning and memory in adult male mouse. Food Chem Toxicol 2020; 145:111710. [PMID: 32861761 DOI: 10.1016/j.fct.2020.111710] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 08/19/2020] [Accepted: 08/22/2020] [Indexed: 01/09/2023]
Abstract
The present study aims to examine the effect of early lactational perfluorooctane sulfonate (PFOS) exposures on learning and memory in male mice and reveal the underlying mechanisms involved. PFOS solution was orally administered to dams from the postpartum days 1-14, so that pups would be exposed through breast milk. At 8-10 weeks of age, we performed object location test (OLT), object recognition test (ORT), and pairwise visual discrimination (VD) task. We also performed in vivo microdialysis, and mRNA and protein analysis of genes responsible for hippocampal development and function. In both OLT and ORT, the performance of mice in the PFOS-exposed group was significantly lower than those in the control group. In the VD task, the PFOS-exposed group learned significantly slower than the control group. Concentrations of glutamate and gamma-aminobutyric acid in the dorsal hippocampus were significantly higher in the PFOS-exposed group than in the control group. No notable differences were shown in our mRNA and protein studies. The present study showed that lactational PFOS exposure has a profound, long-lasting neurotoxic effect in the hippocampus and consequently leads to learning and memory deficits.
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Affiliation(s)
- Abdallah Mshaty
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Asahi Haijima
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan; Laboratory for Environmental Brain Science, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan.
| | - Yusuke Takatsuru
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan; Department of Nutrition and Health Science, Toyo University, Itakura, Gunma, 374-0193, Japan
| | - Ayane Ninomiya
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroyuki Yajima
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Michifumi Kokubo
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Miski Aghnia Khairinisa
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan; Department of Pharmacology and Clinical Pharmacy, Universitas Padjadjaran, Bandung, Indonesia
| | - Wataru Miyazaki
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan; Department of Bioscience and Laboratory Medicine, Graduate School of Health Sciences, Hirosaki University, 1 Bunkyo-cho, Hirosaki, Aomori, 036-8560, Japan
| | - Izuki Amano
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
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Horigane SI, Ozawa Y, Zhang J, Todoroki H, Miao P, Haijima A, Yanagawa Y, Ueda S, Nakamura S, Kakeyama M, Takemoto-Kimura S. A mouse model of Timothy syndrome exhibits altered social competitive dominance and inhibitory neuron development. FEBS Open Bio 2020; 10:1436-1446. [PMID: 32598571 PMCID: PMC7396430 DOI: 10.1002/2211-5463.12924] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 06/13/2020] [Accepted: 06/25/2020] [Indexed: 01/17/2023] Open
Abstract
Multiple genetic factors related to autism spectrum disorder (ASD) have been identified, but the biological mechanisms remain obscure. Timothy syndrome (TS), associated with syndromic ASD, is caused by a gain-of-function mutation, G406R, in the pore-forming subunit of L-type Ca2+ channels, Cav 1.2. In this study, a mouse model of TS, TS2-neo, was used to enhance behavioral phenotyping and to identify developmental anomalies in inhibitory neurons. Using the IntelliCage, which enables sequential behavioral tasks without human handling and mouse isolation stress, high social competitive dominance was observed in TS2-neo mice. Furthermore, histological analysis demonstrated inhibitory neuronal abnormalities in the neocortex, including an excess of smaller-sized inhibitory presynaptic terminals in the somatosensory cortex of young adolescent mice and higher numbers of migrating inhibitory neurons from the medial ganglionic eminence during embryonic development. In contrast, no obvious changes in excitatory synaptic terminals were found. These novel neural abnormalities in inhibitory neurons of TS2-neo mice may result in a disturbed excitatory/inhibitory (E/I) balance, a key feature underlying ASD.
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Affiliation(s)
- Shin-Ichiro Horigane
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan.,Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yukihiro Ozawa
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan.,Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Jun Zhang
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan.,Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroe Todoroki
- Laboratory for Systems Neurosciences and Preventive Medicine, Faculty of Human Sciences, Waseda University, Tokorozawa, Japan
| | - Pan Miao
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan.,Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Asahi Haijima
- Laboratory for Systems Neurosciences and Preventive Medicine, Faculty of Human Sciences, Waseda University, Tokorozawa, Japan.,Research Institute for Environmental Medical Sciences, Waseda University, Tokorozawa, Japan
| | - Yuchio Yanagawa
- Department of Genetic and Behavioral Neuroscience, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Shuhei Ueda
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan.,Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shigeo Nakamura
- Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Masaki Kakeyama
- Laboratory for Systems Neurosciences and Preventive Medicine, Faculty of Human Sciences, Waseda University, Tokorozawa, Japan.,Research Institute for Environmental Medical Sciences, Waseda University, Tokorozawa, Japan
| | - Sayaka Takemoto-Kimura
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan.,Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, Saitama, Japan
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Ninomiya A, Hosoi N, Kokubo M, Amano I, Haijima A, Miyazaki W, Hirai H, Koibuchi N. SAT-454 A Novel Role of Thyroid Hormone Receptor in Synaptic Plasticity in Cerebellar Purkinje Cells. J Endocr Soc 2020. [PMCID: PMC7207436 DOI: 10.1210/jendso/bvaa046.1706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Thyroid hormone (TH) is essential for the development and the maintenance of the brain function. TH action is mediated by TH receptor (TR). TR binds to a specific DNA sequence on TH-target genes and thus functions as a ligand-dependent transcription factor. In thyroid diseases such as congenital hypothyroidism or resistance to TH (RTH), TH-TR binding is dominantly disrupted, leading to the various symptoms such as motor deficits. However, in such cases, all the cells that express TR get affected by the disrupted TR signaling; thus, the specific mechanism has not been cleared. It has been well known that proper motor coordination is deeply related to long term depression (LTD) of synaptic transmission from parallel fiber (PF) to Purkinje cell (PC) in the cerebellum (Ito, 1989). Therefore, we examined the involvement of TR in synaptic plasticity at PF-PC synapses by using transgenic mice (Mf-1 mice) which express dominant-negative TR specifically in PCs. Since Mf-1 display the impairment of motor coordination and motor learning, a decrease in TR signaling in PCs may alter synaptic plasticity and contribute to motor incoordination. A whole-cell patch clamp recording of Mf-1 PCs revealed the inhibition of LTD but instead the induction of long term potentiation (LTP) of the synaptic transmission at PF-PC synapses. This indicates that the intracellular calcium dynamics may be disrupted in Mf-1 PCs since LTD requires a higher elevation of the intracellular calcium concentration in PCs than LTP does. Indeed, single-PC qPCR showed that the mRNA levels of some important molecules for the intracellular calcium dynamics in PCs (SERCA2, IP3R, and P/Q-type calcium channel) are downregulated in Mf-1 PCs. This result suggests those genes as possible TH-target genes. Taken together, the present study suggested a novel possible role of TR in synaptic plasticity at PF-PC synapses by regulating the expression of some important genes for LTD occurrence in the cerebellum. This finding could give a new insight into the mechanism of motor deficits in thyroid diseases.
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Amano I, Takatsuru Y, Haijima A, Haraguchi S, Koibuchi N. SAT-442 The Impact of Chronic Excess Iodine Intake in Adult Mice Behavior. J Endocr Soc 2020. [PMCID: PMC7207694 DOI: 10.1210/jendso/bvaa046.1180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Iodine is one of the essential micronutrient which is required for the synthesis of thyroid hormones. Thus, iodine deficiency may result in the hypothyroidism. Iodine deficiency is one of the most common causes of preventable mental retardation and brain damage in the world. On the other hand, Japanese iodine intake exceeds that of most other countries, due to the significant seaweed consumption such as kelp. The Japanese Ministry of Health, Labour and Welfare estimates average iodine consumption at 1.2mg/day in Japan. In contrast, the recommended tolerable upper intake levels for adult is 1.1 mg / day in the United States. Generally, Japanese takes twenty times higher amount of iodine than Americans. Iodine tolerance among individual humans varies greatly, and the excess iodine can cause both hyper- and hypo- thyroidism. Furthermore, the effect of thyroid dysfunction due to iodine excess on brain function has not been clarified. In this study, we generated a mouse models for chronic iodine excess and evaluated its effect on brain development. C57BL/6 dams and their pups mice were treated with KIO3 37.4mg/l through drinking water. Behavioral experiments (novel object recognition test, novel object in location test, visual discrimination test, and three-room social behavior test) were conducted at 10-weeks-old. After the behavioral analysis, mice were sacrificed to collect trunk blood and tissues. Excess iodine intake caused hypertrophy of thyroid follicles regardless of the administered dose. However, there were no differences in thyroid hormone status among groups. Thyroid hormone responsive genes in the hippocampus were also not affected in experiment group. In the behavioral analysis, female mice showed an increase in learning ability. In summary, although the chronic overdose of iodine does not affect thyroid hormone levels, it may affect cognitive learning function. The gender difference in the consequence was also observed. These results indicate that the chronic iodine excess may cause various changes, although the body is tolerable with excess iodine.
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Affiliation(s)
- Izuki Amano
- Gunma University Graduate School of Medicine, Maebashi, Japan
| | | | - Asahi Haijima
- Gunma University Graduate School of Medicine, Maebashi, Japan
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Khairinisa MA, Takatsuru Y, Amano I, Kokubo M, Haijima A, Miyazaki W, Koibuchi N. Perinatal Propylthiouracil-Induced Hypothyroidism Impaired Motor Coordination in Adult Female Offspring. Pharmacology and Clinical Pharmacy Research (PCPR) is an international peer-reviewed journal devoted to publish origina 2019. [DOI: 10.15416/pcpr.v4i3.25264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Thyroid hormone (TH) play crucial roles in the growth and development of brain. Efficiency of TH during the perinatal period results in severe mental and physical retardation, known as cretinism in humans. Animal models have largely focused on mild and severe hypothyroidism associated with deficits in body weight, developmental delays, and cognitive deficits. Although various behavioral analyses have been reported, the effect of perinatal hypothyroidism in adult female mice has not been clarified. The aim of this study was to examine whether propylthiouracil (PTU)-induced hypothyroidism could impair motor coordination in female offspring. We used C57BL/6j mice and divided them into three groups based on the dose of PTU which was applied during perinatal period (embryonic day-14 to postnatal day-14); control, 5 ppm, and 50 ppm groups. We observed motor coordination function and additional nociceptive test in female offspring. We found that motor coordination and nociceptive threshold were affected in 50 ppm groups. We concluded that the moderate hypothyroidism could impair motor coordination in adult offspring.
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Abstract
Mild perinatal hypothyroidism may result from inadequate iodine intake, insufficient treatment of congenital hypothyroidism, or exposure to endocrine-disrupting chemicals. Because thyroid hormones are critical for brain development, severe hypothyroidism that is untreated in infancy causes irreversible cretinism. Milder hypothyroidism may also affect cognitive development; however, the effects of mild and/or moderate hypothyroidism on brain development are not fully understood. In this study, we examined the behavior of adult male mice rendered mildly hypothyroid during the perinatal period using low-dose propylthiouracil (PTU). PTU was administered through drinking water (5 or 50 ppm) from gestational day 14 to postnatal day 21. Cognitive performance, studied by an object in-location test (OLT), was impaired in PTU-treated mice at postnatal week 8. These results suggest that, although the hypothyroidism was mild, it partially impaired cognitive function. We next measured the concentration of neurotransmitters (glutamate, γ-aminobutyric acid, and glycine) in the hippocampus using in vivo microdialysis during OLT. The concentrations of neurotransmitters, particularly glutamate and glycine, decreased in PTU-treated mice. The expression levels of N-methyl-d-aspartate receptor subunits, which are profound regulators of glutamate neurotransmission and memory function, also were decreased in PTU-treated mice. These data indicate that mild perinatal hypothyroidism causes cognitive disorders in adult offspring. Such disorders may be partially induced secondary to decreased concentrations of neurotransmitters and receptor expression.
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Affiliation(s)
- Izuki Amano
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Yusuke Takatsuru
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Miski Aghnia Khairinisa
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Michifumi Kokubo
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Asahi Haijima
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
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Kaneko R, Takatsuru Y, Morita A, Amano I, Haijima A, Imayoshi I, Tamamaki N, Koibuchi N, Watanabe M, Yanagawa Y. Inhibitory neuron-specific Cre-dependent red fluorescent labeling using VGAT BAC-based transgenic mouse lines with identified transgene integration sites. J Comp Neurol 2018; 526:373-396. [PMID: 29063602 DOI: 10.1002/cne.24343] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 09/30/2017] [Accepted: 10/17/2017] [Indexed: 01/15/2023]
Abstract
Inhibitory neurons are crucial for shaping and regulating the dynamics of the entire network, and disturbances in these neurons contribute to brain disorders. Despite the recent progress in genetic labeling techniques, the heterogeneity of inhibitory neurons requires the development of highly characterized tools that allow accurate, convenient, and versatile visualization of inhibitory neurons in the mouse brain. Here, we report a novel genetic technique to visualize the vast majority and/or sparse subsets of inhibitory neurons in the mouse brain without using techniques that require advanced skills. We developed several lines of Cre-dependent tdTomato reporter mice based on the vesicular GABA transporter (VGAT)-BAC, named VGAT-stop-tdTomato mice. The most useful line (line #54) was selected for further analysis based on two characteristics: the inhibitory neuron-specificity of tdTomato expression and the transgene integration site, which confers efficient breeding and fewer adverse effects resulting from transgene integration-related genomic disruption. Robust and inhibitory neuron-specific expression of tdTomato was observed in a wide range of developmental and cellular contexts. By breeding the VGAT-stop-tdTomato mouse (line #54) with a novel Cre driver mouse line, Galntl4-CreER, sparse labeling of inhibitory neurons was achieved following tamoxifen administration. Furthermore, another interesting line (line #58) was generated through the unexpected integration of the transgene into the X-chromosome and will be used to map X-chromosome inactivation of inhibitory neurons. Taken together, our studies provide new, well-characterized tools with which multiple aspects of inhibitory neurons can be studied in the mouse.
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Affiliation(s)
- Ryosuke Kaneko
- Bioresource Center, Gunma University Graduate School of Medicine, Gunma, Japan
- Department of Genetic and Behavioral Neuroscience, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Yusuke Takatsuru
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
- Department of Medicine, Johmoh Hospital, Gunma, Japan
| | - Ayako Morita
- Bioresource Center, Gunma University Graduate School of Medicine, Gunma, Japan
- Department of Genetic and Behavioral Neuroscience, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Izuki Amano
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Asahi Haijima
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Itaru Imayoshi
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Nobuaki Tamamaki
- Department of Morphological Neural Science, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Masahiko Watanabe
- Department of Anatomy, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Yuchio Yanagawa
- Department of Genetic and Behavioral Neuroscience, Gunma University Graduate School of Medicine, Gunma, Japan
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Kaneko R, Takatsuru Y, Morita A, Amano I, Haijima A, Imayoshi I, Tamamaki N, Koibuchi N, Watanabe M, Yanagawa Y. Cover Image, Volume 526, Issue 3. J Comp Neurol 2018. [DOI: 10.1002/cne.24363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ryosuke Kaneko
- Bioresource Center; Gunma University Graduate School of Medicine; Gunma Japan
- Department of Genetic and Behavioral Neuroscience; Gunma University Graduate School of Medicine; Gunma Japan
| | - Yusuke Takatsuru
- Department of Integrative Physiology; Gunma University Graduate School of Medicine; Gunma Japan
- Department of Medicine; Johmoh Hospital; Gunma Japan
| | - Ayako Morita
- Bioresource Center; Gunma University Graduate School of Medicine; Gunma Japan
- Department of Genetic and Behavioral Neuroscience; Gunma University Graduate School of Medicine; Gunma Japan
| | - Izuki Amano
- Department of Integrative Physiology; Gunma University Graduate School of Medicine; Gunma Japan
| | - Asahi Haijima
- Department of Integrative Physiology; Gunma University Graduate School of Medicine; Gunma Japan
| | - Itaru Imayoshi
- Graduate School of Biostudies; Kyoto University; Kyoto Japan
| | - Nobuaki Tamamaki
- Department of Morphological Neural Science, Graduate School of Medical Sciences; Kumamoto University; Kumamoto Japan
| | - Noriyuki Koibuchi
- Department of Integrative Physiology; Gunma University Graduate School of Medicine; Gunma Japan
| | - Masahiko Watanabe
- Department of Anatomy; Hokkaido University Graduate School of Medicine; Sapporo Japan
| | - Yuchio Yanagawa
- Department of Genetic and Behavioral Neuroscience; Gunma University Graduate School of Medicine; Gunma Japan
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Khairinisa MA, Takatsuru Y, Amano I, Kokubo M, Haijima A, Miyazaki W, Koibuchi N. In Utero and Postnatal Propylthiouracil-Induced Mild Hypothyroidism Impairs Maternal Behavior in Mice. Front Endocrinol (Lausanne) 2018; 9:228. [PMID: 29867761 PMCID: PMC5960672 DOI: 10.3389/fendo.2018.00228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/20/2018] [Indexed: 12/26/2022] Open
Abstract
Thyroid hormones (THs) play crucial roles in general and brain development. Even if the hypothyroidism is mild, it may alter brain function, resulting in irreversible behavioral alterations. Although various behavioral analyses have been conducted, the effects of propylthiouracil (PTU) treatment during in utero and postnatal periods on maternal behavior have not yet been studied. The present study examined in mice whether THs insufficiency during development induce behavioral changes. Pregnant C57BL/6j mice were divided into three groups, and each group was administered different dosages of PTU (0, 5, or 50 ppm) in drinking water during in utero and postnatal periods (from gestational day 14 to postnatal day 21). First, locomotor activity and cognitive function were assessed in the offspring at 10 weeks. Next, female offspring were mated with normal mice and they and their offspring were used to assess several aspects of maternal behavior (identifying first pup, returning all pups to nest, time spent nursing, and licking pups). As expected, locomotor and cognitive functions in these mice were disrupted in a PTU dose-dependent manner. On postpartum day 2, dams who had been exposed 50 ppm PTU during in utero and postnatal periods displayed a significantly longer time identifying the first pup and returning all three pups back to the nest, less time nursing, and decreased licking behavior. The decrease in maternal behavior was significantly correlated with a decrease in cognition. These results indicate that insufficiency of THs during in utero and postnatal periods impairs maternal behavior, which may be partly induced by impaired cognitive function.
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Affiliation(s)
- Miski Aghnia Khairinisa
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi, Japan
- Department of Pharmacology and Clinical Pharmacy, Universitas Padjadjaran, Bandung, Indonesia
| | - Yusuke Takatsuru
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Izuki Amano
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Michifumi Kokubo
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Asahi Haijima
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Wataru Miyazaki
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi, Japan
- *Correspondence: Noriyuki Koibuchi,
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12
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Yajima H, Haijima A, Khairinisa MA, Shimokawa N, Amano I, Takatsuru Y. Early-life stress induces cognitive disorder in middle-aged mice. Neurobiol Aging 2017; 64:139-146. [PMID: 29458841 DOI: 10.1016/j.neurobiolaging.2017.12.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 12/15/2017] [Accepted: 12/21/2017] [Indexed: 01/09/2023]
Abstract
Early-life stress can induce several neuropsychological disorders in adulthood. However, the underlying mechanisms inducing such disorders are still not fully understood. Furthermore, the effects of early-life stress on the changes in cognitive function with age are still not clarified. In this study, we used maternal deprivation (MD) to examine the cognitive function in middle-aged mice using a touchscreen-equipped operant chamber. In the visual-discrimination task, the aged (∼1.4 years old) control mice could accurately learn to discriminate between different visual stimuli. In contrast, the correct response rate of aged MD mice increased to ∼60% by day 10; it was still significantly lower than that of the control mice (85%). In the hippocampus of aged MD mice, the expression level of the N-methyl-d-aspartate receptor subunit GluN1 decreased significantly as compared to that in control mice. On the other hand, no significant difference in GluN1 expression level was detected in young (2.5 months old) mice. These findings indicate that early-life stress accelerates cognitive impairment in middle-aged mice.
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Affiliation(s)
- Hiroyuki Yajima
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Asahi Haijima
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Miski Aghnia Khairinisa
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Noriaki Shimokawa
- Department of Nutrition, Takasaki University of Health and Welfare, Takasaki, Gunma, Japan
| | - Izuki Amano
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Yusuke Takatsuru
- Department of Medicine, Johmoh Hospital, Maebashi, Gunma, Japan.
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13
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Haijima A, Lesmana R, Shimokawa N, Amano I, Takatsuru Y, Koibuchi N. Differential neurotoxic effects of in utero and lactational exposure to hydroxylated polychlorinated biphenyl (OH-PCB 106) on spontaneous locomotor activity and motor coordination in young adult male mice. J Toxicol Sci 2017; 42:407-416. [PMID: 28717099 DOI: 10.2131/jts.42.407] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
We investigated whether in utero or lactational exposure to 4-hydroxy-2',3,3',4',5'-pentachlorobiphenyl (OH-PCB 106) affects spontaneous locomotor activity and motor coordination in young adult male mice. For in utero exposure, pregnant C57BL/6J mice received 0.05 or 0.5 mg/kg body weight of OH-PCB 106 or corn oil vehicle via gavage every second day from gestational day 10 to 18. For lactational exposure, the different groups of dams received 0.05 or 0.5 mg/kg body weight of OH-PCB 106 or corn oil vehicle via gavage every second day from postpartum day 3 to 13. At 6-7 weeks of age, the spontaneous locomotor activities of male offspring were evaluated for a 24-hr continuous session in a home cage and in an open field for 30-min. Motor coordination function on an accelerating rotarod was also measured. Mice exposed prenatally to OH-PCB 106 showed increased spontaneous locomotor activities during the dark phase in the home cage and during the first 10-min in the open field compared with control mice. Mice exposed lactationally to OH-PCB 106, however, did not show a time-dependent decrease in locomotor activity in the open field. Instead, their locomotor activity increased significantly during the second 10-min block. In addition, mice exposed lactationally to OH-PCB 106 displayed impairments in motor coordination in the rotarod test. These results suggest that perinatal exposure to OH-PCB 106 affects motor behaviors in young adult male mice. Depending on the period of exposure, OH-PCB 106 may have different effects on neurobehavioral development.
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Affiliation(s)
- Asahi Haijima
- Center for Medical Education, Gunma University Graduate School of Medicine.,Department of Integrative Physiology, Gunma University Graduate School of Medicine
| | - Ronny Lesmana
- Department of Integrative Physiology, Gunma University Graduate School of Medicine.,Department of Physiology, Universitas Padjadjaran, Indonesia
| | - Noriaki Shimokawa
- Department of Integrative Physiology, Gunma University Graduate School of Medicine.,Department of Nutrition, Takasaki University of Health and Welfare
| | - Izuki Amano
- Department of Integrative Physiology, Gunma University Graduate School of Medicine
| | - Yusuke Takatsuru
- Department of Integrative Physiology, Gunma University Graduate School of Medicine
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine
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14
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Abstract
BACKGROUND Thyroid hormone (TH) plays a key role in the developing brain, including the cerebellum. TH deficiency induces organizational changes of the cerebellum, causing cerebellar ataxia. However, the mechanisms causing these abnormalities are poorly understood. Various animal models have been used to study the mechanism. Lacking dual oxidase (DUOX) and its maturation factor (DUOXA) are major inducers of congenital hypothyroidism. Thus, this study examined the organizational changes of the cerebellum using knockout mice of the Duoxa gene (Duoxa-/-). METHODS The morphological, behavioral, and electrophysiological changes were analyzed in wild type (Wt) and Duoxa-deficient (Duoxa-/-) mice from postnatal day (P) 10 to P30. To detect the changes in the expression levels of presynaptic proteins, Western blot analysis was performed. RESULTS The proliferation and migration of granule cells was delayed after P15 in Duoxa-/- mice. However, these changes disappeared by P25. Although the cerebellar structure of Duoxa-/- mice was not significantly different from that of Wt mice at P25, motor coordination was impaired. It was also found that the amplitude of paired-pulse facilitation at parallel fiber-Purkinje cell synapses decreased in Duoxa-/- mice, particularly at P15. There were no differences between expression levels of presynaptic proteins regulating neurotransmitter release at P25. CONCLUSIONS These results indicate that the anatomical catch-up growth of the cerebellum did not normalize its function because of the disturbance of neuronal circuits by the combined effect of hypothyroidism and functional disruption of the DUOX/DUOXA complex.
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Affiliation(s)
- Izuki Amano
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Yusuke Takatsuru
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Syutaro Toya
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Asahi Haijima
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Toshiharu Iwasaki
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Helmut Grasberger
- Department of Medicine, The University of Chicago, Chicago, Illinois
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Samuel Refetoff
- Department of Medicine, The University of Chicago, Chicago, Illinois
- Department of Pediatrics, The University of Chicago, Chicago, Illinois
- Department of Genetics, The University of Chicago, Chicago, Illinois
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Japan
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Shimokawa N, Yousefi B, Morioka S, Yamaguchi S, Ohsawa A, Hayashi H, Azuma A, Mizuno H, Kasagi M, Masuda H, Jingu H, Furudate SI, Haijima A, Takatsuru Y, Iwasaki T, Umezu M, Koibuchi N. Altered cerebellum development and dopamine distribution in a rat genetic model with congenital hypothyroidism. J Neuroendocrinol 2014; 26:164-75. [PMID: 24460919 DOI: 10.1111/jne.12135] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 12/30/2013] [Accepted: 01/20/2014] [Indexed: 12/14/2022]
Abstract
Thyroid hormones play crucial roles in the development and functional maintenance of the central nervous system. Despite extensive studies of the neural function of thyroid hormones, little is known about the effects of hypothyroidism on behavioural traits and the mechanisms underlying such effects. In the present study, we report an investigation of congenitally hypothyroid mutant rdw rats, revealing a novel function of thyroid hormones in the central nervous system. The rdw rats were subjected to behavioural analyses such as the rotarod test, open field test and circadian activity measurement. To determine the cause of behavioural disorders, cerebellar morphogenesis was examined by immunohistochemical analysis, and the axonal transport of dopamine in the nigrostriatal pathway was analysed by high-performance liquid chromatography and western blotting. The effects of thyroxine administration to the rdw rats were examined by behavioural analysis. The rdw rats showed severe impairment of motor coordination and balance. This could be explained by the fact that the rats showed severe retardation of cerebellar morphogenesis, which correlates with the small somata and poor dendritic arborisation of Purkinje cells and retarded migration of granule cells particularly during the first two postnatal weeks. Moreover, the rdw rats showed hypoactivity, characterised by decreased circadian locomotor activity. After weaning, thyroxine administration improved the dwarfism in rdw rats but had no effect on cerebellar function. In addition, the rdw rats showed anxiety and depression intrinsically to novel surroundings. Interestingly, the rdw rats showed high levels of dopamine in the substantia nigra and low levels in the striatum, an important centre for the coordination of behaviour. Furthermore, low levels of tubulin in the striatum were detected, indicating the aberrant axonal transport of dopamine in the nigrostriatal pathway as a result of the reduced delivery of microtubules. These findings indicate an important function of thyroid hormones in cerebellar formation and in the regulation of axonal transport of dopamine. Moreover, rdw rats will be useful for studies of brain function and behavioural disorders in congenital hypothyroidism.
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Affiliation(s)
- N Shimokawa
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma, Japan
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16
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Endo T, Kakeyama M, Uemura Y, Haijima A, Okuno H, Bito H, Tohyama C. Executive function deficits and social-behavioral abnormality in mice exposed to a low dose of dioxin in utero and via lactation. PLoS One 2012; 7:e50741. [PMID: 23251380 PMCID: PMC3520971 DOI: 10.1371/journal.pone.0050741] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Accepted: 10/23/2012] [Indexed: 12/15/2022] Open
Abstract
An increasing prevalence of mental health problems has been partly ascribed to abnormal brain development that is induced upon exposure to environmental chemicals. However, it has been extremely difficult to detect and assess such causality particularly at low exposure levels. To address this question, we here investigated higher brain function in mice exposed to dioxin in utero and via lactation by using our recently developed automated behavioral flexibility test and immunohistochemistry of neuronal activation markers Arc, at the 14 brain areas. Pregnant C57BL/6 mice were given orally a low dose of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) at a dose of either 0, 0.6 or 3.0 µg/kg on gestation day 12.5. When the pups reached adulthood, they were group-housed in IntelliCage to assess their behavior. As a result, the offspring born to dams exposed to 0.6 µg TCDD/kg were shown to have behavioral inflexibility, compulsive repetitive behavior, and dramatically lowered competitive dominance. In these mice, immunohistochemistry of Arc exhibited the signs of hypoactivation of the medial prefrontal cortex (mPFC) and hyperactivation of the amygdala. Intriguingly, mice exposed to 3.0 µg/kg were hardly affected in both the behavioral and neuronal activation indices, indicating that the robust, non-monotonic dose-response relationship. In conclusion, this study showed for the first time that perinatal exposure to a low dose of TCDD in mice develops executive function deficits and social behavioral abnormality accompanied with the signs of imbalanced mPFC-amygdala activation.
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Affiliation(s)
- Toshihiro Endo
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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17
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Yoshioka W, Endo N, Kurashige A, Haijima A, Endo T, Shibata T, Nishiyama R, Kakeyama M, Tohyama C. Fluorescence laser microdissection reveals a distinct pattern of gene activation in the mouse hippocampal region. Sci Rep 2012; 2:783. [PMID: 23136640 PMCID: PMC3491666 DOI: 10.1038/srep00783] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 10/10/2012] [Indexed: 02/06/2023] Open
Abstract
A histoanatomical context is imperative in an analysis of gene expression in a cell in a tissue to elucidate physiological function of the cell. In this study, we made technical advances in fluorescence laser microdissection (LMD) in combination with the absolute quantification of small amounts of mRNAs from a region of interest (ROI) in fluorescence-labeled tissue sections. We demonstrate that our fluorescence LMD-RTqPCR method has three orders of dynamic range, with the lower limit of ROI-size corresponding to a single cell. The absolute quantification of the expression levels of the immediate early genes in an ROI equivalent to a few hundred neurons in the hippocampus revealed that mice transferred from their home cage to a novel environment have distinct activation profiles in the hippocampal regions (CA1, CA3, and DG) and that the gene expression pattern in CA1, but not in the other regions, follows a power law distribution.
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Affiliation(s)
- Wataru Yoshioka
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Nozomi Endo
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Akie Kurashige
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Asahi Haijima
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
- Current address: Department of Integrative Physiology, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan
| | - Toshihiro Endo
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Toshiyuki Shibata
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
- Department of Human Ecology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Ryutaro Nishiyama
- Research/Clinical/Industrial Division, Leica Microsystems K.K., Tokyo 108-0072, Japan
| | - Masaki Kakeyama
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Chiharu Tohyama
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
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Haijima A, Ichitani Y. Dissociable anterograde amnesic effects of retrosplenial cortex and hippocampal lesions on spontaneous object recognition memory in rats. Hippocampus 2012; 22:1868-75. [PMID: 22467347 DOI: 10.1002/hipo.22021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2012] [Indexed: 01/10/2023]
Abstract
The amnesic effects of excitotoxic lesions of the rat retrosplenial cortex (RS) and hippocampus (HPC) in the spontaneous object recognition (SOR) performance were investigated. The SOR test consisted of the sample-exposure session(s) and a test session. First, to test retrograde amnesia, rats received four sample-exposure sessions within a day at 4 weeks and 1 day before the surgery, respectively. In the test sessions conducted 1 week after the surgery, both lesion groups showed a temporally ungraded retrograde amnesia. Second, to test anterograde amnesia, 1- and 4-week retention intervals were inserted between the four sample-exposure sessions and the test session. The RS-lesioned rats showed a retention interval-dependent impairment in the test sessions, while the HPC-lesioned rats showed an impairment regardless of the retention interval. Finally, to test short-term recognition memory, 5- or 30-min delay was interposed between the single sample-exposure session and the test session. Both lesion groups performed normally irrespective of the delay length. These results suggest that both the RS and HPC are important for long-term object recognition memory, but these areas have different roles in it.
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Affiliation(s)
- Asahi Haijima
- Institute of Psychology, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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Haijima A, Endo T, Zhang Y, Miyazaki W, Kakeyama M, Tohyama C. In utero and lactational exposure to low doses of chlorinated and brominated dioxins induces deficits in the fear memory of male mice. Neurotoxicology 2010; 31:385-90. [PMID: 20398696 DOI: 10.1016/j.neuro.2010.04.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Revised: 03/20/2010] [Accepted: 04/06/2010] [Indexed: 01/10/2023]
Abstract
Environmental-level in utero and lactational exposures to dioxins have been considered to affect brain functions of offspring. Here, we determined whether in utero and lactational exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and 2,3,7,8-tetrabromodibenzo-p-dioxin (TBDD), at the dose that does not harm the dams, affects the acquisition and retention of fear memory in mouse offspring. Pregnant C57BL/6J mice were administered by gavages TCDD or TBDD at a dose of 0 or 3.0 microg/kg body weight on gestation day 12.5, and their male offspring were examined for their behavior in adulthood. In the fear conditioning, a paired presentation of tone and foot shock was repeated three times, and retention tests for contextual and auditory fear memory were carried out 1 and 24h after the fear conditioning. Groups of mice that were exposed to TCDD and TBDD in utero and via lactation showed deficits in the contextual and auditory retention tests at 1 and 24h retention intervals. The present results suggest that maternal exposure to a low dose of TCDD or TBDD disrupts the functions of memory and emotion in male mouse offspring, and that the developmental toxicities of these chemicals are similar to each other.
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Affiliation(s)
- Asahi Haijima
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033, Japan
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Takemoto-Kimura S, Kamijo S, Horigane S, Suzuki K, Okuno H, Haijima A, Endo T, Takeuchi T, Abe M, Natsume R, Yamazaki M, Mori H, Tohyama C, Sakimura K, Mishina M, Kakeyama M, Bito H. Histological and behavioral analyses in CL3/CaMKIgamma-deficient mice. Neurosci Res 2010. [DOI: 10.1016/j.neures.2010.07.1795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Haijima A, Ichitani Y. Anterograde and retrograde amnesia of place discrimination in retrosplenial cortex and hippocampal lesioned rats. Learn Mem 2008; 15:477-82. [DOI: 10.1101/lm.862308] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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