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Pilkay S, Riffer A, Carroll A. Trauma context exerts intergenerational effects on child mental health via DNA methylation. Epigenetics 2024; 19:2333654. [PMID: 38577817 PMCID: PMC11000619 DOI: 10.1080/15592294.2024.2333654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 03/18/2024] [Indexed: 04/06/2024] Open
Abstract
Many people experience traumatic or negative events, but few develop mental health issues as a result. This study investigated whether newborn DNA methylation (DNAm) previously associated with maternal childhood physical abuse by her father affected the child's mental health and physical growth, as well as whether it mediated or moderated developmental outcomes. METHODS Study sample (N = 903) and data came from Bristol University's Avon Longitudinal Study of Parents and Children. DNAm was measured in cord blood at birth. DNAm data was preprocessed, normalized, and quality controlled before subsetting to 60 CpG sites of interest from previous research. Linear regression analysis examined newborn DNAm and child development outcome associations. Sobel test examined the mediating relationship between mother's history of childhood abuse by father, newborn targeted gene DNAm of significant CpG sites, and child's mental health and physical growth. Moderation analyses examined the interaction effects between the significant CpG sites and mothers' physical abuse by their fathers on child's mental health and physical growth. RESULTS Full cohort analyses showed that newborn DNAm of several different CpG sites associates with separation anxiety, fear, and unhappy/tearful presentations in children aged 6-7 y. Sex-specific associations emerged with boys showing associations with anxiety and fear, and girls showing associations with fear and unhappiness. In boys only, cord blood DNAm mediates the effect of maternal childhood trauma on offspring mental health. No moderation effects emerged. CONCLUSION Intergenerational effects of mother's relationship to her abuser present in newborn DNAm associate with 7-year-old child's mental health, show sex-specific effects, and newborn DNAm does mediate maternal childhood trauma effects on offspring mental health in early-life.
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Affiliation(s)
- Stefanie Pilkay
- Falk College of Sport and Human Dynamics, School of Social Work, Syracuse University, Syracuse, NYUSA
| | - Andie Riffer
- Jane Addams College of Social Work, University of Illinois at Chicago, Chicago, IL, USA
| | - Andrew Carroll
- Falk College of Sport and Human Dynamics, School of Social Work, Syracuse University, Syracuse, NYUSA
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2
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Tokunaga W, Nagano N, Matsuda K, Nakazaki K, Shimizu S, Okuda K, Aoki R, Fuwa K, Murakami H, Morioka I. Efficacy of Human Recombinant Growth Hormone in Females of a Non-Obese Hyperglycemic Mouse Model after Birth with Low Birth Weight. Int J Mol Sci 2024; 25:6294. [PMID: 38928001 PMCID: PMC11203808 DOI: 10.3390/ijms25126294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 05/29/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
We examined whether the administration of growth hormone (GH) improves insulin resistance in females of a non-obese hyperglycemic mouse model after birth with low birth weight (LBW), given that GH is known to increase muscle mass. The intrauterine Ischemia group underwent uterine artery occlusion for 15 min on day 16.5 of gestation. At 4 weeks of age, female mice in the Ischemia group were divided into the GH-treated (Ischemia-GH) and non-GH-treated (Ischemia) groups. At 8 weeks of age, the glucose metabolism, muscle pathology, and metabolome of liver were assessed. The insulin resistance index improved in the Ischemia-GH group compared with the Ischemia group (p = 0.034). The percentage of type 1 muscle fibers was higher in the Ischemia-GH group than the Ischemia group (p < 0.001); the muscle fiber type was altered by GH. In the liver, oxidative stress factors were reduced, and ATP production was increased in the Ischemia-GH group compared to the Ischemia group (p = 0.014), indicating the improved mitochondrial function of liver. GH administration is effective in improving insulin resistance by increasing the content of type 1 muscle fibers and improving mitochondrial function of liver in our non-obese hyperglycemic mouse model after birth with LBW.
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Affiliation(s)
- Wataru Tokunaga
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | - Nobuhiko Nagano
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | - Kengo Matsuda
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | - Kimitaka Nakazaki
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | - Shoichi Shimizu
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | - Koh Okuda
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | - Ryoji Aoki
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | - Kazumasa Fuwa
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
| | | | - Ichiro Morioka
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo 173-8610, Japan; (W.T.); (K.M.); (K.N.); (S.S.); (K.O.); (R.A.); (K.F.); (I.M.)
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3
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Guez-Barber D, Eisch AJ, Cristancho AG. Developmental Brain Injury and Social Determinants of Health: Opportunities to Combine Preclinical Models for Mechanistic Insights into Recovery. Dev Neurosci 2023; 45:255-267. [PMID: 37080174 PMCID: PMC10614252 DOI: 10.1159/000530745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 04/14/2023] [Indexed: 04/22/2023] Open
Abstract
Epidemiological studies show that social determinants of health are among the strongest factors associated with developmental outcomes after prenatal and perinatal brain injuries, even when controlling for the severity of the initial injury. Elevated socioeconomic status and a higher level of parental education correlate with improved neurologic function after premature birth. Conversely, children experiencing early life adversity have worse outcomes after developmental brain injuries. Animal models have provided vital insight into mechanisms perturbed by developmental brain injuries, which have indicated directions for novel therapeutics or interventions. Animal models have also been used to learn how social environments affect brain maturation through enriched environments and early adverse conditions. We recognize animal models cannot fully recapitulate human social circumstances. However, we posit that mechanistic studies combining models of developmental brain injuries and early life social environments will provide insight into pathways important for recovery. Some studies combining enriched environments with neonatal hypoxic injury models have shown improvements in developmental outcomes, but further studies are needed to understand the mechanisms underlying these improvements. By contrast, there have been more limited studies of the effects of adverse conditions on developmental brain injury extent and recovery. Uncovering the biological underpinnings for early life social experiences has translational relevance, enabling the development of novel strategies to improve outcomes through lifelong treatment. With the emergence of new technologies to analyze subtle molecular and behavioral phenotypes, here we discuss the opportunities for combining animal models of developmental brain injury with social construct models to deconvolute the complex interactions between injury, recovery, and social inequity.
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Affiliation(s)
- Danielle Guez-Barber
- Division of Child Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Amelia J. Eisch
- Department of Anesthesiology and Critical Care, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Ana G. Cristancho
- Division of Child Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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4
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Yang J, Wang M, Lv Y, Chen J. Cortical Layer Markers Expression and Increased Synaptic Density in Interstitial Neurons of the White Matter from Drug-Resistant Epilepsy Patients. Brain Sci 2023; 13:brainsci13040626. [PMID: 37190591 DOI: 10.3390/brainsci13040626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 03/29/2023] [Accepted: 04/04/2023] [Indexed: 05/17/2023] Open
Abstract
The interstitial neurons in the white matter of the human and non-human primate cortex share a similar developmental origin with subplate neurons and deep-layer cortical neurons. A subset of interstitial neurons expresses the molecular markers of subplate neurons, but whether interstitial neurons express cortical layer markers in the adult human brain remains unexplored. Here we report the expression of cortical layer markers in interstitial neurons in the white matter of the adult human brain, supporting the hypothesis that interstitial neurons could be derived from cortical progenitor cells. Furthermore, we found increased non-phosphorylated neurofilament protein (NPNFP) expression in interstitial neurons in the white matter of drug-resistant epilepsy patients. We also identified the expression of glutamatergic and g-aminobutyric acid (GABAergic) synaptic puncta that were distributed in the perikarya and dendrites of interstitial neurons. The density of glutamatergic and GABAergic synaptic puncta was increased in interstitial neurons in the white matter of drug-resistant epilepsy patients compared with control brain tissues with no history of epilepsy. Together, our results provide important insights of the molecular identity of interstitial neurons in the adult human white matter. Increased synaptic density of interstitial neurons could result in an imbalanced synaptic network in the white matter and participate as part of the epileptic network in drug-resistant epilepsy.
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Affiliation(s)
- Jiachao Yang
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brian Medicine, Zhejiang University, Hangzhou 310058, China
| | - Mi Wang
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brian Medicine, Zhejiang University, Hangzhou 310058, China
| | - Yang Lv
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brian Medicine, Zhejiang University, Hangzhou 310058, China
| | - Jiadong Chen
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brian Medicine, Zhejiang University, Hangzhou 310058, China
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5
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A Unique "Reversed" Migration of Neurons in the Developing Claustrum. J Neurosci 2023; 43:693-708. [PMID: 36631266 PMCID: PMC9899091 DOI: 10.1523/jneurosci.0704-22.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 10/24/2022] [Accepted: 12/10/2022] [Indexed: 01/13/2023] Open
Abstract
The claustrum (CLA) is a cluster of neurons located between the insular cortex and striatum. Many studies have shown that the CLA plays an important role in higher brain function. Additionally, growing evidence suggests that CLA dysfunction is associated with neuropsychological symptoms. However, how the CLA is formed during development is not fully understood. In the present study, we analyzed the development of the CLA, especially focusing on the migration profiles of CLA neurons in mice of both sexes. First, we showed that CLA neurons were generated between embryonic day (E) 10.5 and E12.5, but mostly at E11.5. Next, we labeled CLA neurons born at E11.5 using the FlashTag technology and revealed that most neurons reached the brain surface by E13.5 but were distributed deep in the CLA 1 d later at E14.5. Time-lapse imaging of GFP-labeled cells revealed that some CLA neurons first migrated radially outward and then changed their direction inward after reaching the surface. Moreover, we demonstrated that Reelin signal is necessary for the appropriate distribution of CLA neurons. The switch from outward to "reversed" migration of developing CLA neurons is distinct from other migration modes, in which neurons typically migrate in a certain direction, which is simply outward or inward. Future elucidation of the characteristics and precise molecular mechanisms of CLA development may provide insights into the unique cognitive functions of the CLA.SIGNIFICANCE STATEMENT The claustrum (CLA) plays an important role in higher brain function, and its dysfunction is associated with neuropsychological symptoms. Although psychiatric disorders are increasingly being understood as disorders of neurodevelopment, little is known about CLA development, including its neuronal migration profiles and underlying molecular mechanisms. Here, we investigated the migration profiles of CLA neurons during development and found that they migrated radially outward and then inward after reaching the surface. This switch in the migratory direction from outward to inward may be one of the brain's fundamental mechanisms of nuclear formation. Our findings enable us to investigate the relationship between CLA maldevelopment and dysfunction, which may facilitate understanding of the pathogenesis of some psychiatric disorders.
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6
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Hazra D, Yoshinaga S, Yoshida K, Takata N, Tanaka KF, Kubo KI, Nakajima K. Rhythmic activation of excitatory neurons in the mouse frontal cortex improves the prefrontal cortex-mediated cognitive function. Cereb Cortex 2022; 32:5243-5258. [PMID: 35136976 DOI: 10.1093/cercor/bhac011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 01/07/2022] [Accepted: 01/08/2022] [Indexed: 12/27/2022] Open
Abstract
The prefrontal cortex (PFC) plays essential roles in cognitive processes. Previous studies have suggested the layer and the cell type-specific activation for cognitive enhancement. However, the mechanism by which a temporal pattern of activation affects cognitive function remains to be elucidated. Here, we investigated whether the specific activation of excitatory neurons in the superficial layers mainly in the PFC according to a rhythmic or nonrhythmic pattern could modulate the cognitive functions of normal mice. We used a C128S mutant of channelrhodopsin 2, a step function opsin, and administered two light illumination patterns: (i) alternating pulses of blue and yellow light for rhythmic activation or (ii) pulsed blue light only for nonrhythmic activation. Behavioral analyses were performed to compare the behavioral consequences of these two neural activation patterns. The alternating blue and yellow light pulses, but not the pulsed blue light only, significantly improved spatial working memory and social recognition without affecting motor activity or the anxiety level. These results suggest that the rhythmic, but not the nonrhythmic, activation could enhance cognitive functions. This study indicates that not only the population of neurons that are activated but also the pattern of activation plays a crucial role in the cognitive enhancement.
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Affiliation(s)
- Debabrata Hazra
- Department of Anatomy, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Satoshi Yoshinaga
- Department of Anatomy, Keio University School of Medicine, Tokyo 160-8582, Japan.,Department of Anatomy, The Jikei University School of Medicine, Tokyo 105-8461, Japan
| | - Keitaro Yoshida
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Norio Takata
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Kenji F Tanaka
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Ken-Ichiro Kubo
- Department of Anatomy, Keio University School of Medicine, Tokyo 160-8582, Japan.,Department of Anatomy, The Jikei University School of Medicine, Tokyo 105-8461, Japan
| | - Kazunori Nakajima
- Department of Anatomy, Keio University School of Medicine, Tokyo 160-8582, Japan
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7
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Bakalar D, O’Reilly JJ, Lacaille H, Salzbank J, Ellegood J, Lerch JP, Sasaki T, Imamura Y, Hashimoto-Torii K, Vacher CM, Penn AA. Lack of placental neurosteroid alters cortical development and female somatosensory function. Front Endocrinol (Lausanne) 2022; 13:972033. [PMID: 36313771 PMCID: PMC9606442 DOI: 10.3389/fendo.2022.972033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/28/2022] [Indexed: 01/24/2023] Open
Abstract
Placental endocrine function is essential to fetal brain development. Placental hormones include neurosteroids such as allopregnanolone (ALLO), a regulator of neurodevelopmental processes via positive allosteric modulation of the GABAA receptor (GABAA-R). Using a mouse model (plKO) in which the gene encoding the ALLO synthesis enzyme is specifically deleted in trophoblasts, we previously showed that placental ALLO insufficiency alters cerebellar white matter development and leads to male-specific autistic-like behavior. We now demonstrate that the lack of placental ALLO causes female-predominant alterations of cortical development and function. Placental ALLO insufficiency disrupts cell proliferation in the primary somatosensory cortex (S1) in a sex-linked manner. Early changes are seen in plKO embryos of both sexes, but persist primarily in female offspring after birth. Adolescent plKO females show significant reduction in pyramidal neuron density, as well as somatosensory behavioral deficits as compared with plKO males and control littermates. Assessment of layer-specific markers in human postmortem cortices suggests that preterm infants may also have female-biased abnormalities in cortical layer specification as compared with term infants. This study establishes a novel and fundamental link between placental function and sex-linked long-term neurological outcomes, emphasizing the importance of the growing field of neuroplacentology.
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Affiliation(s)
- Dana Bakalar
- Center for Neuroscience Research, Children’s Research Institute, Children’s National Health System, Washington, DC, United States
| | - Jiaqi J. O’Reilly
- Division of Neonatology, Department of Pediatrics, NewYork-Presbyterian Morgan Stanley Children’s Hospital, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, United States
| | - Helene Lacaille
- Division of Neonatology, Department of Pediatrics, NewYork-Presbyterian Morgan Stanley Children’s Hospital, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, United States
| | - Jacquelyn Salzbank
- Division of Neonatology, Department of Pediatrics, NewYork-Presbyterian Morgan Stanley Children’s Hospital, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, United States
| | - Jacob Ellegood
- Mouse Imaging Centre (MICe), Hospital for Sick Children, Toronto, ON, Canada
| | - Jason P. Lerch
- Wellcome Centre for Integrative Neuroimaging (WIN), Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Toru Sasaki
- Center for Neuroscience Research, Children’s Research Institute, Children’s National Health System, Washington, DC, United States
| | - Yuka Imamura
- Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Kazue Hashimoto-Torii
- Center for Neuroscience Research, Children’s Research Institute, Children’s National Health System, Washington, DC, United States
| | - Claire-Marie Vacher
- Division of Neonatology, Department of Pediatrics, NewYork-Presbyterian Morgan Stanley Children’s Hospital, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, United States
| | - Anna A. Penn
- Division of Neonatology, Department of Pediatrics, NewYork-Presbyterian Morgan Stanley Children’s Hospital, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, United States
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8
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Gadra EC, Cristancho AG. A Simplified Paradigm of Late Gestation Transient Prenatal Hypoxia to Investigate Functional and Structural Outcomes from a Developmental Hypoxic Insult. Bio Protoc 2022; 12:e4519. [PMID: 36313199 PMCID: PMC9548518 DOI: 10.21769/bioprotoc.4519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 08/04/2022] [Accepted: 08/11/2022] [Indexed: 12/29/2022] Open
Abstract
Late-gestation transient intrauterine hypoxia is a common cause of birth injury. It can lead to long-term neurodevelopmental disabilities even in the absence of gross anatomic injury. Currently, postnatal models of hypoxia-ischemia are most commonly used to study the effect of oxygen deprivation in the fetal brain. These models, however, are unable to take into account placental factors that influence the response to hypoxia, exhibit levels of cell death not seen in many human patients, and are unable to model preterm hypoxia. To address this gap in research, we have developed a protocol to induce transient hypoxia in fetal mice. A pregnant dam at gestational day 17.5 is placed into a hypoxia chamber. Over 30 min, the inspired oxygen is titrated from 21% (ambient air) to 5%. The dam remains in the chamber for up to 8 h, after which fetal brains can be collected or pups delivered for postnatal studies. This protocol recapitulates phenotypes seen in human patients exposed to transient in utero hypoxia and is readily reproducible by researchers. Graphical abstract.
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Affiliation(s)
- Elyse C. Gadra
- Division of Child Neurology, Children’s Hospital of Philadelphia, PA, USA
| | - Ana G. Cristancho
- Division of Child Neurology, Children’s Hospital of Philadelphia, PA, USA
,
Department of Pediatrics, Children’s Hospital of Philadelphia, PA, USA
,
Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
,
*For correspondence:
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9
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Katayama D, Nagano N, Shimizu S, Nakazaki K, Matsuda K, Tokunaga W, Fuwa K, Aoki R, Morioka I. A Non-Obese Hyperglycemic Mouse Model that Develops after Birth with Low Birthweight. Biomedicines 2022; 10:biomedicines10071642. [PMID: 35884949 PMCID: PMC9312481 DOI: 10.3390/biomedicines10071642] [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: 06/07/2022] [Revised: 07/02/2022] [Accepted: 07/07/2022] [Indexed: 11/29/2022] Open
Abstract
The number of low birthweight (LBW) infants weighing below 2500 g has not decreased in Japan. This study aimed to develop an adult non-obese hyperglycemic mouse model born with LBW to study the pathogenesis. At 16.5 days of gestation, transient intrauterine ischemia (blocked blood flow in both uterine arteries for 15 min) was performed in a subgroup of pregnant mice (group I). Non-occluded dams were used as sham controls (group C). After birth, female pups in each group were weaned at 4 weeks of age and reared on the normal diet until 8 weeks of age (n = 7). Fasting blood glucose levels, serum immunoreactive insulin (IRI), and body composition were then measured. Metabolite analyses was performed on the liver tissues. Birthweight was significantly lower in group I compared with group C. Pups from group I remained underweight with low fat-free mass and showed hyperglycemia with high serum IRI and homeostasis model assessment of insulin resistance levels, indicating insulin resistance. Metabolite analyses showed significantly reduced adenosine triphosphate and nicotinamide adenine dinucleotide production and increased lactic acid in group I. The pathogenesis of our non-obese hyperglycemic mouse model may be due to increased myogenic insulin resistance based on mitochondrial dysfunction and reduced lean body mass.
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10
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Phosphorylation of Focal Adhesion Kinase at Y925: Role in Glia-Dependent and Independent Migration through Regulating Cofilin and N-Cadherin. Mol Neurobiol 2022; 59:3467-3484. [PMID: 35325397 DOI: 10.1007/s12035-022-02773-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 02/16/2022] [Indexed: 10/18/2022]
Abstract
The adult neocortex is a six-layered structure, consisting of nearly continuous layers of neurons that are generated in a temporally strictly coordinated order. During development, cortical neurons originating from the ventricular zone migrate toward the Reelin-containing marginal zone in an inside-out arrangement. Focal adhesion kinase (FAK), one tyrosine kinase localizing to focal adhesions, has been shown to be phosphorylated at tyrosine 925 (Y925) by Src, an important downstream molecule of Reelin signaling. Up to date, the precise molecular mechanisms of FAK and its phosphorylation at Y925 during neuronal migration are still unclear. Combining in utero electroporation with immunohistochemistry and live imaging, we examined the function of FAK in regulating neuronal migration. We show that phosphorylated FAK is colocalized with Reelin positive Cajal-Retzius cells in the developing neocortex and hippocampus. Phosphorylation of FAK at Y925 is significantly reduced in reeler mice. Overexpression and dephosphorylation of FAK impair locomotion and translocation, resulting in migration inhibition and dislocation of both late-born and early-born neurons. These migration defects are highly correlated to the function of FAK in regulating cofilin phosphorylation and N-Cadherin expression, both are involved in Reelin signaling pathway. Thus, fine-tuned phosphorylation of focal adhesion kinase at Y925 is crucial for both glia-dependent and independent neuronal migration.
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11
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Dab1-deficient deep layer neurons prevent Dab1-deficient superficial layer neurons from entering the cortical plate. Neurosci Res 2022; 180:23-35. [DOI: 10.1016/j.neures.2022.03.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 02/06/2023]
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Adult Upper Cortical Layer Specific Transcription Factor CUX2 Is Expressed in Transient Subplate and Marginal Zone Neurons of the Developing Human Brain. Cells 2021; 10:cells10020415. [PMID: 33671178 PMCID: PMC7922267 DOI: 10.3390/cells10020415] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/10/2021] [Accepted: 02/13/2021] [Indexed: 12/18/2022] Open
Abstract
Cut-Like Homeobox 2 (Cux2) is a transcription factor involved in dendrite and spine development, and synapse formation of projection neurons placed in mouse upper neocortical layers. Therefore, Cux2 is often used as an upper layer marker in the mouse brain. However, expression of its orthologue CUX2 remains unexplored in the human fetal neocortex. Here, we show that CUX2 protein is expressed in transient compartments of developing neocortical anlage during the main fetal phases of neocortical laminar development in human brain. During the early fetal phase when neurons of the upper cortical layers are still radially migrating to reach their final place in the cortical anlage, CUX2 was expressed in the marginal zone (MZ), deep cortical plate, and pre-subplate. During midgestation, CUX2 was still expressed in the migrating upper cortical neurons as well as in the subplate (SP) and MZ neurons. At the term age, CUX2 was expressed in the gyral white matter along with its expected expression in the upper layer neurons. In sum, CUX2 was expressed in migratory neurons of prospective superficial layers and in the diverse subpopulation of transient postmigratory SP and MZ neurons. Therefore, our findings indicate that CUX2 is a novel marker of distinct transient, but critical histogenetic events during corticogenesis. Given the Cux2 functions reported in animal models, our data further suggest that the expression of CUX2 in postmigratory SP and MZ neurons is associated with their unique dendritic and synaptogenesis characteristics.
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13
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Jinnou H. Regeneration using endogenous neural stem cells following neonatal brain injury. Pediatr Int 2021; 63:13-21. [PMID: 32609915 DOI: 10.1111/ped.14368] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 05/29/2020] [Accepted: 06/25/2020] [Indexed: 01/25/2023]
Abstract
Despite recent advancements in perinatal care, the incidence of neonatal brain injury has not decreased. No therapies are currently available to repair injured brain tissues. In the postnatal brain, neural stem cells reside in the ventricular-subventricular zone (V-SVZ) and continuously generate new immature neurons (neuroblasts). After brain injury in rodents, V-SVZ-derived neuroblasts migrate toward the injured area using blood vessels as a scaffold. Notably, the neonatal V-SVZ has a remarkable neurogenic capacity. Furthermore, compared with the adult brain, after neonatal brain injury, larger numbers of neuroblasts migrate toward the lesion, raising the possibility that the V-SVZ could be a source for endogenous neuronal regeneration after neonatal brain injury. We recently demonstrated that efficient migration of V-SVZ-derived neuroblasts toward a lesion is supported by neonatal radial glia via neural cadherin (N-cadherin)-mediated neuron-fiber contact, which promotes RhoA activity. Moreover, providing blood vessel- and radial glia-mimetic scaffolds for migrating neuroblasts promotes neuronal migration and improves functional gait behaviors after neonatal brain injury. In the V-SVZ, oligodendrocyte progenitor cells (OPCs) are also generated and migrate toward the surrounding white matter, where they differentiate and form myelin. After white matter injury in rodents, the production and subsequent migration of V-SVZ-derived OPCs are enhanced. In the neonatal period, administration of growth factors at a specific time promotes oligodendrocyte regeneration and functional recovery after brain injury. These findings suggest that activating the high regenerative capacity that is specific to the neonatal period could lead to the development of new therapeutic strategies for neonatal brain injury.
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Affiliation(s)
- Hideo Jinnou
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.,Developmental and Regenerative Neurobiology, Institute of Brain Science, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
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14
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Ball G, Seidlitz J, O’Muircheartaigh J, Dimitrova R, Fenchel D, Makropoulos A, Christiaens D, Schuh A, Passerat-Palmbach J, Hutter J, Cordero-Grande L, Hughes E, Price A, Hajnal JV, Rueckert D, Robinson EC, Edwards AD. Cortical morphology at birth reflects spatiotemporal patterns of gene expression in the fetal human brain. PLoS Biol 2020; 18:e3000976. [PMID: 33226978 PMCID: PMC7721147 DOI: 10.1371/journal.pbio.3000976] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 12/07/2020] [Accepted: 11/02/2020] [Indexed: 02/07/2023] Open
Abstract
Interruption to gestation through preterm birth can significantly impact cortical development and have long-lasting adverse effects on neurodevelopmental outcome. We compared cortical morphology captured by high-resolution, multimodal magnetic resonance imaging (MRI) in n = 292 healthy newborn infants (mean age at birth = 39.9 weeks) with regional patterns of gene expression in the fetal cortex across gestation (n = 156 samples from 16 brains, aged 12 to 37 postconceptional weeks [pcw]). We tested the hypothesis that noninvasive measures of cortical structure at birth mirror areal differences in cortical gene expression across gestation, and in a cohort of n = 64 preterm infants (mean age at birth = 32.0 weeks), we tested whether cortical alterations observed after preterm birth were associated with altered gene expression in specific developmental cell populations. Neonatal cortical structure was aligned to differential patterns of cell-specific gene expression in the fetal cortex. Principal component analysis (PCA) of 6 measures of cortical morphology and microstructure showed that cortical regions were ordered along a principal axis, with primary cortex clearly separated from heteromodal cortex. This axis was correlated with estimated tissue maturity, indexed by differential expression of genes expressed by progenitor cells and neurons, and engaged in stem cell differentiation, neuron migration, and forebrain development. Preterm birth was associated with altered regional MRI metrics and patterns of differential gene expression in glial cell populations. The spatial patterning of gene expression in the developing cortex was thus mirrored by regional variation in cortical morphology and microstructure at term, and this was disrupted by preterm birth. This work provides a framework to link molecular mechanisms to noninvasive measures of cortical development in early life and highlights novel pathways to injury in neonatal populations at increased risk of neurodevelopmental disorder. Interruption to gestation through preterm birth can significantly impact cortical development and have long-lasting adverse effects on neurodevelopmental outcome. A large neuroimaging study of newborn infants reveals how their cortical structure at birth is associated with patterns of gene expression in the fetal cortex and how this relationship is affected by preterm birth.
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Affiliation(s)
- Gareth Ball
- Developmental Imaging, Murdoch Children’s Research Institute, Melbourne, Australia
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
- * E-mail:
| | - Jakob Seidlitz
- Developmental Neurogenomics Unit, National Institute of Mental Health, Bethesda, United States of America
- Department of Psychiatry, University of Cambridge, United Kingdom
| | - Jonathan O’Muircheartaigh
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Ralica Dimitrova
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Daphna Fenchel
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Antonios Makropoulos
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Daan Christiaens
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Belgium
| | - Andreas Schuh
- Biomedical Image Analysis Group, Department of Computing, Imperial College London, United Kingdom
| | | | - Jana Hutter
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Lucilio Cordero-Grande
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Emer Hughes
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Anthony Price
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Jo V. Hajnal
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - Daniel Rueckert
- Biomedical Image Analysis Group, Department of Computing, Imperial College London, United Kingdom
| | - Emma C. Robinson
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
| | - A David Edwards
- Centre for the Developing Brain, Department of Perinatal Imaging & Health, King’s College London, United Kingdom
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15
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Kubo KI, Deguchi K. Human neocortical development as a basis to understand mechanisms underlying neurodevelopmental disabilities in extremely preterm infants. J Obstet Gynaecol Res 2020; 46:2242-2250. [PMID: 32924239 DOI: 10.1111/jog.14468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 08/24/2020] [Indexed: 01/21/2023]
Abstract
AIM Recent advances in perinatal and neonatal medicine have resulted in marked improvements in the survival rates of extremely preterm infants (born before 28 gestational weeks) around the world, and Japan is among the countries with the highest reported survival rates of extremely preterm infants. However, it remains a major concern that many survivors develop neurodevelopmental disabilities, including cognitive dysfunctions and neurodevelopmental disorders later in life. In order to understand the pathophysiological mechanisms underlying the neurodevelopmental disabilities observed in the survivors of extremely preterm births, we reviewed recently reported findings about the development of the human neocortex. METHODS First, we have summarized the current knowledge about the development of the neocortex, including recently reported human- and/or primate-specific developmental events. Next, we discussed the possible causal mechanisms underlying the development of neurodevelopmental disabilities in extremely preterm infants. RESULTS Around the birth of extremely preterm infants, neurogenesis and succeeding neuronal migrations are ongoing in the neocortex of human brain. Expansion and maturation of the subplate, which is thought to reflect the axonal wiring in the neocortex, is also prominent at this time. CONCLUSION Brain injuries that occur around the birth of extremely preterm infants are presumed to affect the dynamic developmental events in the neocortex, such as neurogenesis, neuronal migrations and maturation of the subplate, which could underlie the neurodevelopmental disabilities that often develop subsequently in extremely preterm infants. These possibilities should be borne in mind while considering maternal and neonatal care to further improve the long-term outcomes of extremely preterm infants.
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Affiliation(s)
- Ken-Ichiro Kubo
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan.,Department of Anatomy, The Jikei University School of Medicine, Tokyo, Japan
| | - Kimiko Deguchi
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan.,Department of Pediatrics, Deguchi Pediatric Clinic, Omura, Japan
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16
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Spinelli M, Boucard C, Di Nicuolo F, Haesler V, Castellani R, Pontecorvi A, Scambia G, Granieri C, Barnea ER, Surbek D, Mueller M, Di Simone N. Synthetic PreImplantation Factor (sPIF) reduces inflammation and prevents preterm birth. PLoS One 2020; 15:e0232493. [PMID: 32511256 PMCID: PMC7279576 DOI: 10.1371/journal.pone.0232493] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 04/15/2020] [Indexed: 01/05/2023] Open
Abstract
Preterm birth (PTB) is the leading cause of neonatal morbidity and mortality and spontaneous PTB is a major contributor. The preceding inflammation/infection contributes not only to spontaneous PTB but is associated with neonatal morbidities including impaired brain development. Therefore, control of exaggerated immune response during pregnancy is an attractive strategy. A potential candidate is synthetic PreImplantation Factor (sPIF) as sPIF prevents inflammatory induced fetal loss and has neuroprotective properties. Here, we tested maternal sPIF prophylaxis in pregnant mice subjected to a lipopolysaccharides (LPS) insult, which results in PTB. Additionally, we evaluated sPIF effects in placental and microglial cell lines. Maternal sPIF application reduced the LPS induced PTB rate significantly. Consequently, sPIF reduced microglial activation (Iba-1 positive cells) and preserved neuronal migration (Cux-2 positive cells) in fetal brains. In fetal brain lysates sPIF decreased IL-6 and INFγ concentrations. In-vitro, sPIF reduced Iba1 and TNFα expression in microglial cells and reduced the expression of pro-apoptotic (Bad and Bax) and inflammatory (IL-6 and NLRP4) genes in placental cell lines. Together, maternal sPIF prophylaxis prevents PTB in part by controlling exaggerated immune response. Given the sPIF`FDA Fast Track approval in non-pregnant subjects, we envision sPIF therapy in pregnancy.
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Affiliation(s)
- Marialuigia Spinelli
- Department of Obstetrics and Gynecology and Department of Biomedical Research, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Céline Boucard
- Department of Obstetrics and Gynecology and Department of Biomedical Research, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Fiorella Di Nicuolo
- Università Cattolica del Sacro Cuore, Istituto di Clinica Ostetrica e Ginecologica, Roma, Italia
- International Scientific Institute Paolo VI, Università Cattolica Del Sacro Cuore, A. Gemelli Universitary Hospital, Rome, Italia
| | - Valerie Haesler
- Department of Obstetrics and Gynecology and Department of Biomedical Research, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Roberta Castellani
- Università Cattolica del Sacro Cuore, Istituto di Clinica Ostetrica e Ginecologica, Roma, Italia
| | - Alfredo Pontecorvi
- Università Cattolica del Sacro Cuore, Istituto di Clinica Ostetrica e Ginecologica, Roma, Italia
- U.O.C di Endocrinologia e Diabetologia, Dipartimento di Scienze Gastroenterologiche, Endocrino-Metaboliche e Nefro-Urologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia
| | - Giovanni Scambia
- Università Cattolica del Sacro Cuore, Istituto di Clinica Ostetrica e Ginecologica, Roma, Italia
- U.O.C. di Ginecologia Oncologica, Dipartimento di Scienze della Salute della Donna, del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia
| | - Chiara Granieri
- Università Cattolica del Sacro Cuore, Istituto di Clinica Ostetrica e Ginecologica, Roma, Italia
| | - Eytan R. Barnea
- The Society for The Investigation of Early Pregnancy (SIEP), Cherry Hill, NJ, United States of America
- BioIncept LLC, Cherry Hill, NJ, United States of America
| | - Daniel Surbek
- Department of Obstetrics and Gynecology and Department of Biomedical Research, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Martin Mueller
- Department of Obstetrics and Gynecology and Department of Biomedical Research, University Hospital Bern, University of Bern, Bern, Switzerland
- * E-mail: (MM); (NDS)
| | - Nicoletta Di Simone
- Università Cattolica del Sacro Cuore, Istituto di Clinica Ostetrica e Ginecologica, Roma, Italia
- Dipartimento di Scienze della Salute della Donna e del Bambino, Fondazione Policlinico Universitario A. Gemelli IRCCS, U.O.C. di Ostetricia e Patologia Ostetrica, Roma, Italia
- * E-mail: (MM); (NDS)
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17
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Kubo KI. Increased densities of white matter neurons as a cross-disease feature of neuropsychiatric disorders. Psychiatry Clin Neurosci 2020; 74:166-175. [PMID: 31788900 DOI: 10.1111/pcn.12962] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/22/2019] [Accepted: 11/26/2019] [Indexed: 12/12/2022]
Abstract
While neurons of the human cerebral cortex are mainly distributed in the gray matter, the white matter (WM) also contains some excitatory and inhibitory neurons, so-called WM neurons. Studies on the cytoarchitectural alterations in the brains of patients with neuropsychiatric disorders have repeatedly reported increased densities of the WM neurons in a proportion of patients with schizophrenia and autism spectrum disorder. Although some studies have demonstrated increased densities of superficial WM neurons, others have demonstrated increased densities of deep WM neurons and increased WM neuron densities can be considered as one of the cross-disease features of neuropsychiatric disorders. Nevertheless, what actually causes the increase in the densities of the WM neurons still remains under debate, and several hypothetical mechanisms have been proposed. The WM neurons in normal brains are considered as remnants of the subplate neurons, which represent a transient cytoarchitectural zone present during development of the mammalian neocortex; it has been suggested that increased densities of the WM neurons could result from inappropriate apoptosis of the subplate neurons in the brains of patients with neuropsychiatric disorders. On the other hand, recent experimental studies have demonstrated that genetic and environmental factors that enhance the risk of development of neuropsychiatric disorders could cause altered distribution of neurons in the WM. To understand the pathophysiology underlying the increased densities of the WM neurons, it is important to investigate the cellular characteristics of the WM neurons in the brains of both normal subjects and patients with neuropsychiatric disorders.
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Affiliation(s)
- Ken-Ichiro Kubo
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan.,Department of Anatomy, The Jikei University School of Medicine, Tokyo, Japan
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18
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Shin M, Kitazawa A, Yoshinaga S, Hayashi K, Hirata Y, Dehay C, Kubo K, Nakajima K. Both excitatory and inhibitory neurons transiently form clusters at the outermost region of the developing mammalian cerebral neocortex. J Comp Neurol 2019; 527:1577-1597. [PMID: 30636008 DOI: 10.1002/cne.24634] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 12/20/2018] [Accepted: 01/08/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Minkyung Shin
- Department of AnatomyKeio University School of Medicine Tokyo Japan
| | - Ayako Kitazawa
- Department of AnatomyKeio University School of Medicine Tokyo Japan
| | | | - Kanehiro Hayashi
- Department of AnatomyKeio University School of Medicine Tokyo Japan
| | - Yukio Hirata
- Department of AnatomyKeio University School of Medicine Tokyo Japan
| | - Colette Dehay
- Inserm, Stem Cell and Brain Research Institute U1208Université de Lyon, Université Claude Bernard Lyon 1 Bron France
| | - Ken‐ichiro Kubo
- Department of AnatomyKeio University School of Medicine Tokyo Japan
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19
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Hayashi Y, Jinnou H, Sawamoto K, Hitoshi S. Adult neurogenesis and its role in brain injury and psychiatric diseases. J Neurochem 2018; 147:584-594. [PMID: 30028510 DOI: 10.1111/jnc.14557] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/26/2018] [Accepted: 07/10/2018] [Indexed: 12/16/2022]
Abstract
In the adult mammalian brain, neural stem cells (NSCs) reside in two neurogenic regions, the walls of the lateral ventricles, and the subgranular zone of the hippocampus, which generate new neurons for the olfactory bulb and dentate gyrus, respectively. These adult NSCs retain their self-renewal ability and capacity to differentiate into neurons and glia as demonstrated by in vitro studies. However, their contribution to tissue repair in disease and injury is limited, lending credence to the claim by prominent neuropathologist Ramón y Cajal that 'once development was ended, the founts of growth and regeneration of the axons and dendrites dried up irrevocably'. However, recent progress toward understanding the fundamental biology of adult NSCs and their role in pathological conditions has provided new insight into the potential therapeutic utility of endogenous NSCs. In this short review, we highlight two topics: the altered behavior of NSCs after brain damage and the dysfunction of NSCs and oligodendrocyte precursor cells, another type of undifferentiated cell in the adult brain, in mood affective disorders.
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Affiliation(s)
- Yoshitaka Hayashi
- Department of Integrative Physiology, Shiga University of Medical Science, Otsu, Japan
| | - Hideo Jinnou
- Department of Developmental and Regenerative Biology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.,Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Kazunobu Sawamoto
- Department of Developmental and Regenerative Biology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.,Division of Neural Development and Regeneration, National Institute for Physiological Sciences, Okazaki, Japan
| | - Seiji Hitoshi
- Department of Integrative Physiology, Shiga University of Medical Science, Otsu, Japan
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Tsuji M, Coq JO, Ogawa Y, Yamamoto Y, Ohshima M. A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis. J Vis Exp 2018. [PMID: 29364276 DOI: 10.3791/56723] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Intrauterine hypoperfusion/ischemia is one of the major causes of intrauterine/fetal growth restriction, preterm birth, and low birth weight. Most studies of this phenomenon have been performed in either models with severe intrauterine ischemia or models with gradient degree of intrauterine hypoperfusion. No study has been performed in a model on uniform mild intrauterine hypoperfusion (MIUH). Two models have been used for studies of MIUH: a model based on suture ligation of either side of the arterial arcade formed with the uterine and ovarian arteries, and a transient model based on clipping the bilateral ovarian arteries and aorta having patency. Those two rodent models of MIUH have some limitations, e.g., not all fetuses are subjected to MIUH, depending on their position in the uterine horn. In our MIUH model, all fetuses are subjected to a comparable level of intrauterine hypoperfusion. MIUH was achieved by mild stenosis of all four arteries feeding the uterus, i.e., the bilateral uterine and ovarian arteries. Arterial stenosis was induced by metal microcoils wrapped around the feeding arteries. Producing arterial stenosis with microcoils allowed us to control, optimize, and reproduce decreased blood flow with very little inter-animal variability and a low mortality rate, thus enabling accurate evaluation. When microcoils with an inner diameter of 0.24 mm were used, the blood flow in both the placenta and fetus was mildly decreased (approximately 30% from the pre-stenosis level in the placenta). The offspring of our MIUH model clearly demonstrates long-lasting alterations in neurological, neuroanatomical and behavioral test results.
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Affiliation(s)
- Masahiro Tsuji
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center;
| | | | - Yuko Ogawa
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center
| | - Yumi Yamamoto
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center
| | - Makiko Ohshima
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center
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