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Hippocampal neurogenesis

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https://www.readbyqxmd.com/read/28431685/galr3-mediates-galanin-proliferative-effects-on-postnatal-hippocampal-precursors
#1
D Khan, M Khan, Johan Runesson, M Zaben, W P Gray
Galanin, a neuropeptide co-released from noradrenergic and serotonergic projection neurons to the dentate gyrus, has recently emerged as an important mediator for signaling neuronal activity to the subgranular neurogenic stem cell niche supporting adult hippocampal neurogenesis. Galanin and its receptors appear to play key roles in depression-like behavior, and effects on hippocampal neurogenesis are relevant to pharmacological strategies for treating depression, which in part appear to rely on restoring altered neurogenesis...
April 5, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28431266/reduced-abnormal-integration-of-adult-generated-granule-cells-does-not-attenuate-spontaneous-recurrent-seizures-in-mice
#2
Kun Zhu, Bo Yuan, Ming Hu, Gai-Feng Feng, Yong Liu, Jian-Xin Liu
Epileptic seizures lead to aberrant hippocampal neurogenesis, including increased proliferation of neural progenitors and abnormal integrations of newly generated granule cells - hilar ectopic granule cells (EGCs), mossy fiber sprouting (MFS), and hilar basal dendrites (HBDs). Previous results from ablating hippocampal neurogenesis after acute seizures have been controversial with regards to the development of spontaneous recurrent seizures (SRSs). While ablation of hippocampal newborn cells was effective, a sufficient decrease of subsequent abnormal integrations in chronically epileptic hippocampus was not well-established in these studies...
April 11, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28427858/mice-with-conditional-neurod1-knockout-display-reduced-aberrant-hippocampal-neurogenesis-but-no-change-in-epileptic-seizures
#3
Rebecca Brulet, Jingfei Zhu, Mahafuza Aktar, Jenny Hsieh, Kyung-Ok Cho
Adult neurogenesis is significantly increased in the hippocampus of rodent models of temporal lobe epilepsy (TLE). These adult-generated neurons have recently been shown to play a contributing role in the development of spontaneous recurrent seizures (SRS). In order to eventually target pro-epileptic adult neurogenesis in the clinical setting, it will be important to identify molecular players involved in the control of aberrant neurogenesis after seizures. Here, we focused on NeuroD1 (ND1), a member of the bHLH family of transcription factors previously shown to play an essential role in the differentiation and maturation of adult-generated neurons in the hippocampus...
April 18, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28427055/aquaporin-4-mediates-the-suppressive-effect-of-lipopolysaccharide-on-hippocampal-neurogenesis
#4
Rui Liang, Shoulei Yong, Xu Huang, Hui Kong, Gang Hu, Yi Fan
OBJECTIVE: Aquaporin-4 (AQP4), a key molecule for water homeostasis in the brain, is associated with adult neurogenesis, but its mechanisms regulating adult neural stem cells (aNSC) remain largely unexplored. Neuroinflammation has a relevant influence on adult neurogenesis, which is a common feature in various neurodegenerative diseases. Considering the possible link between neuroinflammation and AQP4, we speculate that AQP4 may mediate the synthesis and release of proinflammatory cytokines in glia and then indirectly regulate adult hippocampal neurogenesis...
April 21, 2017: Neuroimmunomodulation
https://www.readbyqxmd.com/read/28422706/adult-hippocampal-neurogenesis-an-important-target-associated-with-antidepressant-effects-of-exercise
#5
Lina Sun, Qingshan Sun, Jinshun Qi
Depression is a prevalent devastating mental disorder that affects the normal life of patients and brings a heavy burden to whole society. Although many efforts have been made to attenuate depressive/anxiety symptoms, the current clinic antidepressants have limited effects. Scientists have long been making attempts to find some new strategies that can be applied as the alternative antidepressant therapy. Exercise, a widely recognized healthy lifestyle, has been suggested as a therapy that can relieve psychiatric stress...
April 19, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/28417659/effects-of-nphe-1-arg-14-lys-15-n-ofq-nh2-ufp-101-a-potent-nop-receptor-antagonist-on-molecular-cellular-and-behavioural-alterations-associated-with-chronic-mild-stress
#6
Giovanni Vitale, Monica Filaferro, Maria Vittoria Micioni Di Bonaventura, Valentina Ruggieri, Carlo Cifani, Remo Guerrini, Michele Simonato, Silvia Zucchini
The present study investigated the effect of [Nphe(1)] Arg(14), Lys(15)-N/OFQ-NH2 (UFP-101), a selective NOP receptor antagonist, in chronic mild stress (CMS) in male Wistar rats. NOP receptor antagonists were reported to elicit antidepressant-like effects in rodents. Our aim was to investigate UFP-101 effects on CMS-induced anhedonia and impairment of hippocampal neurogenesis. UFP-101 (10 nmol/rat intracerebroventricularly) did not influence sucrose intake in non-stressed animals, but reinstated basal sucrose consumption in stressed animals from the second week of treatment...
January 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28415806/lithium-protects-hippocampal-progenitors-cognitive-performance-and-hypothalamus-pituitary-function-after-irradiation-to-the-juvenile-rat-brain
#7
Kai Zhou, Cuicui Xie, Malin Wickström, Amalia M Dolga, Yaodong Zhang, Tao Li, Yiran Xu, Carsten Culmsee, Per Kogner, Changlian Zhu, Klas Blomgren
Cranial radiotherapy in children typically causes delayed and progressive cognitive dysfunction and there is no effective preventive strategy for radiation-induced cognitive impairments. Here we show that lithium treatment reduced irradiation-induced progenitor cell death in the subgranular zone of the hippocampus, and subsequently ameliorated irradiation-reduced neurogenesis and astrogenesis in the juvenile rat brain. Irradiation-induced memory impairment, motor hyperactivity and anxiety-like behaviour were normalized by lithium treatment...
March 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28409746/the-role-of-adam10-in-alzheimer-s-disease
#8
Xiang-Zhen Yuan, Sen Sun, Chen-Chen Tan, Jin-Tai Yu, Lan Tan
As a member of the A Disintegrin And Metalloproteinase (ADAM) family, ADAM10 has been identified as the constitutive α-secretase in the process of amyloid-β protein precursor (AβPP) cleavage and plays a critical role in reducing the generation of the amyloid-β (Aβ) peptides. Recent studies have demonstrated its beneficial role in alleviating the pathologic impairment in Alzheimer's disease (AD) both in vitro and in vivo. However, the role of ADAM10 in AD and the underlying molecular mechanisms are still not well established...
April 10, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28407680/transplantation-of-mesenchymal-stem-cells-reverses-behavioural-deficits-and-impaired-neurogenesis-caused-by-prenatal-exposure-to-valproic-acid
#9
Nikolai Gobshtis, Matanel Tfilin, Marina Wolfson, Vadim E Fraifeld, Gadi Turgeman
Neurodevelopmental impairment can affect lifelong brain functions such as cognitive and social behaviour, and may contribute to aging-related changes of these functions. In the present study, we hypothesized that bone marrow-derived mesenchymal stem cells (MSC) administration may repair neurodevelopmental behavioural deficits by modulating adult hippocampal neurogenesis. Indeed, postnatal intracerebral transplantation of MSC has restored cognitive and social behaviour in mice prenatally exposed to valproic acid (VPA)...
March 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28405590/therapeutic-potential-of-igf-i-on-hippocampal-neurogenesis-and-function-during-aging
#10
Gustavo R Morel, Micaela López León, Maia Uriarte, Paula C Reggiani, Rodolfo G Goya
In rats, learning and memory performance decline during normal aging, which is paralleled by a severe reduction of the levels of neurogenesis in the hippocampal dentate gyrus (DG). A promising therapeutic strategy to restore neurogenesis in the hippocampus of old rats and their spatial memory involves the use of insulin-like growth factor-I (IGF-I). The peptide exerts pleiotropic effects in the brain, regulating multiple cellular processes. Thus, 4-week intracerebroventricular (ICV) perfusion of IGF-I significantly restored spatial memory and hippocampal neurogenesis in old male rats...
2017: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/28397068/amniotic-mesenchymal-stem-cells-decrease-a%C3%AE-deposition-and-improve-memory-in-app-ps1-transgenic-mice
#11
Xiao-Yu Zheng, Qian-Quan Wan, Chuan-Yi Zheng, Hong-Long Zhou, Xing-Yu Dong, Qing-Shan Deng, Hui Yao, Qiang Fu, Mou Gao, Zhong-Jie Yan, Shan-Shan Wang, Yu You, Jun Lv, Xiang-Yu Wang, Ke-En Chen, Mao-Ying Zhang, Ru-Xiang Xu
Transplantation of human amniotic mesenchymal stem cells (hAM-MSCs) seems to be a promising strategy for the treatment of neurodegenerative disorders, including Alzheimer's disease (AD). However, the clinical therapeutic effects of hAM-MSCs and their mechanisms of action in AD remain to be determined. Here, we used amyloid precursor protein (APP) and presenilin1 (PS1) double-transgenic mice to evaluate the effects of hAM-MSC transplantation on AD-related neuropathology and cognitive dysfunction. We found that hAM-MSC transplantation into the hippocampus dramatically reduced amyloid-β peptide (Aβ) deposition and rescued spatial learning and memory deficits in APP/PS1 mice...
April 10, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28396435/intranasal-msc-derived-a1-exosomes-ease-inflammation-and-prevent-abnormal-neurogenesis-and-memory-dysfunction-after-status-epilepticus
#12
Qianfa Long, Dinesh Upadhya, Bharathi Hattiangady, Dong-Ki Kim, Su Yeon An, Bing Shuai, Darwin J Prockop, Ashok K Shetty
Status epilepticus (SE), a medical emergency that is typically terminated through antiepileptic drug treatment, leads to hippocampus dysfunction typified by neurodegeneration, inflammation, altered neurogenesis, as well as cognitive and memory deficits. Here, we examined the effects of intranasal (IN) administration of extracellular vesicles (EVs) secreted from human bone marrow-derived mesenchymal stem cells (MSCs) on SE-induced adverse changes. The EVs used in this study are referred to as A1-exosomes because of their robust antiinflammatory properties...
April 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28394502/the-genome-wide-expression-effects-of-escitalopram-and-its-relationship-to-neurogenesis-hippocampal-volume-and-antidepressant-response
#13
Timothy R Powell, Tytus Murphy, Simone de Jong, Sang Hyuck Lee, Katherine E Tansey, Karen Hodgson, Rudolf Uher, Jack Price, Sandrine Thuret, Gerome Breen
Antidepressant-induced hippocampal neurogenesis (AHN) is hypothesized to contribute to increases in hippocampal volume among major depressive disorder patients after long-term treatment. Furthermore, rodent studies suggest AHN may be the cellular mechanism mediating the therapeutic benefits of antidepressants. Here, we perform the first investigation of genome-wide expression changes associated with AHN in human cells. We identify gene expression networks significantly activated during AHN, and we perform gene set analyses to probe the molecular relationship between AHN, hippocampal volume, and antidepressant response...
April 10, 2017: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/28388632/ongoing-neurogenesis-in-the-adult-dentate-gyrus-mediates-behavioral-responses-to-ambiguous-threat-cues
#14
Lucas R Glover, Timothy J Schoenfeld, Rose-Marie Karlsson, David M Bannerman, Heather A Cameron
Fear learning is highly adaptive if utilized in appropriate situations but can lead to generalized anxiety if applied too widely. A role of predictive cues in inhibiting fear generalization has been suggested by stress and fear learning studies, but the effects of partially predictive cues (ambiguous cues) and the neuronal populations responsible for linking the predictive ability of cues and generalization of fear responses are unknown. Here, we show that inhibition of adult neurogenesis in the mouse dentate gyrus decreases hippocampal network activation and reduces defensive behavior to ambiguous threat cues but has neither of these effects if the same negative experience is reliably predicted...
April 2017: PLoS Biology
https://www.readbyqxmd.com/read/28386216/calpastatin-overexpression-preserves-cognitive-function-following-seizures-while-maintaining-post-injury-neurogenesis
#15
Vanessa M Machado, Ana Sofia Lourenço, Cláudia Florindo, Raquel Fernandes, Caetana M Carvalho, Inês M Araújo
In the adult mammalian brain, new neurons continue to be produced throughout life in two main regions in the brain, the subgranular zone (SGZ) in the hippocampus and the subventricular zone in the walls of the lateral ventricles. Neural stem cells (NSCs) proliferate in these niches, and migrate as neuroblasts, to further differentiate in locations where new neurons are needed, either in normal or pathological conditions. However, the endogenous attempt of brain repair is not very efficient. Calpains are proteases known to be involved in neuronal damage and in cell proliferation, migration and differentiation of several cell types, though their effects on neurogenesis are not well known...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28383136/age-related-decline-in-bubr1-impairs-adult-hippocampal-neurogenesis
#16
Zhongxi Yang, Heechul Jun, Chan-Ii Choi, Ki Hyun Yoo, Chang Hoon Cho, Syed Mohammed Qasim Hussaini, Ambrosia J Simmons, Seonhee Kim, Jan M van Deursen, Darren J Baker, Mi-Hyeon Jang
Aging causes significant declines in adult hippocampal neurogenesis and leads to cognitive disability. Emerging evidence demonstrates that decline in the mitotic checkpoint kinase BubR1 level occurs with natural aging and induces progeroid features in both mice and children with mosaic variegated aneuploidy syndrome. Whether BubR1 contributes to age-related deficits in hippocampal neurogenesis is yet to be determined. Here we report that BubR1 expression is significantly reduced with natural aging in the mouse brain...
April 6, 2017: Aging Cell
https://www.readbyqxmd.com/read/28378260/effect-of-metformin-on-adult-hippocampal-neurogenesis-comparison-with-donepezil-and-links-to-cognition
#17
Sara Ahmed, Zahra Mahmood, Aneela Javed, Shoaib Naiyer Hashmi, Inga Zerr, Saima Zafar, Saadia Zahid
Recent studies have uncovered evidence suggesting that interference with hippocampal adult neurogenesis contributes to neurodegeneration in Alzheimer's disease (AD). Evidence supporting that AD is a metabolic disease with derangements in brain glucose utilization implies the use of anti-diabetics as an alternate therapeutic strategy. The present study drew comparison between the pro-neurogenic potential of metformin and donepezil in AlCl3-induced mouse model of neurodegeneration. Morris water maze task and subsequent immunohistochemical evaluation for NeuN was conducted...
April 4, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28375680/electroacupuncture-improves-cognitive-function-and-hippocampal-neurogenesis-after-brain-irradiation
#18
Xing-Wen Fan, Huan-Huan Liu, Hong-Bing Wang, Fu Chen, Yu Yang, Yan Chen, Shi-Kuo Guan, Kai-Liang Wu
Cognitive impairments after brain irradiation seriously affect quality of life for patients, and there is currently no effective treatment. In this study using an irradiated rat model, the role of electroacupuncture was investigated for treatment of radiation-induced brain injury. Animals received 10 Gy exposure to the entire brain, and electroacupuncture was administered 3 days before irradiation as well as up to 2 weeks postirradiation. Behavioral tests were performed one month postirradiation, and rats were then sacrificed for histology or molecular studies...
April 4, 2017: Radiation Research
https://www.readbyqxmd.com/read/28375209/stress-and-adolescent-hippocampal-neurogenesis-diet-and-exercise-as-cognitive-modulators
#19
REVIEW
C M Hueston, J F Cryan, Y M Nolan
Adolescence is a critical period for brain maturation. Deciphering how disturbances to the central nervous system at this time affect structure, function and behavioural outputs is important to better understand any long-lasting effects. Hippocampal neurogenesis occurs during development and continues throughout life. In adulthood, integration of these new cells into the hippocampus is important for emotional behaviour, cognitive function and neural plasticity. During the adolescent period, maturation of the hippocampus and heightened levels of hippocampal neurogenesis are observed, making alterations to neurogenesis at this time particularly consequential...
April 4, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28362320/resilience-and-vulnerability-to-pain-and-inflammation-in-the-hippocampus
#20
REVIEW
Verica Vasic, Mirko H H Schmidt
Increasing evidence demonstrates the importance of hippocampal neurogenesis, a fundamental mechanism of neuroplasticity associated with cognition and emotion, in correlation to neurodegenerative and psychiatric disorders. Neuropsychiatric disorders are often a result of chronic stress or pain followed by inflammation; all these conditions manifest cognitive deficits and impairments in neurogenesis. However, while some individuals are more susceptible to stress, others are able to adapt to new environments via mechanisms of resilience...
March 31, 2017: International Journal of Molecular Sciences
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