scholarly journals Irx3 and Irx5 - Novel Regulatory Factors of Postnatal Hypothalamic Neurogenesis

2021 ◽  
Vol 15 ◽  
Author(s):  
Zhengchao Dou ◽  
Joe Eun Son ◽  
Chi-chung Hui
Keyword(s):  
Stem Cells ◽  
Neural Stem Cells ◽  
Energy Homeostasis ◽  
Adult Mouse ◽  
Radial Glia ◽  
Current Knowledge ◽  
Cell Types ◽  
Neuronal Populations ◽  
Neuronal Progenitors ◽  
Physiological Processes

The hypothalamus is a brain region that exhibits highly conserved anatomy across vertebrate species and functions as a central regulatory hub for many physiological processes such as energy homeostasis and circadian rhythm. Neurons in the arcuate nucleus of the hypothalamus are largely responsible for sensing of peripheral signals such as leptin and insulin, and are critical for the regulation of food intake and energy expenditure. While these neurons are mainly born during embryogenesis, accumulating evidence have demonstrated that neurogenesis also occurs in postnatal-adult mouse hypothalamus, particularly in the first two postnatal weeks. This second wave of active neurogenesis contributes to the remodeling of hypothalamic neuronal populations and regulation of energy homeostasis including hypothalamic leptin sensing. Radial glia cell types, such as tanycytes, are known to act as neuronal progenitors in the postnatal mouse hypothalamus. Our recent study unveiled a previously unreported radial glia-like neural stem cell (RGL-NSC) population that actively contributes to neurogenesis in the postnatal mouse hypothalamus. We also identified Irx3 and Irx5, which encode Iroquois homeodomain-containing transcription factors, as genetic determinants regulating the neurogenic property of these RGL-NSCs. These findings are significant as IRX3 and IRX5 have been implicated in FTO-associated obesity in humans, illustrating the importance of postnatal hypothalamic neurogenesis in energy homeostasis and obesity. In this review, we summarize current knowledge regarding postnatal-adult hypothalamic neurogenesis and highlight recent findings on the radial glia-like cells that contribute to the remodeling of postnatal mouse hypothalamus. We will discuss characteristics of the RGL-NSCs and potential actions of Irx3 and Irx5 in the regulation of neural stem cells in the postnatal-adult mouse brain. Understanding the behavior and regulation of neural stem cells in the postnatal-adult hypothalamus will provide novel mechanistic insights in the control of hypothalamic remodeling and energy homeostasis.

scholarly journals Isolation of Radial Glia-Like Neural Stem Cells from Fetal and Adult Mouse Forebrain via Selective Adhesion to a Novel Adhesive Peptide-Conjugate

PLoS ONE ◽  
2011 ◽  
Vol 6 (12) ◽  
pp. e28538 ◽  
Author(s):  
Károly Markó ◽  
Tímea Kőhidi ◽  
Nóra Hádinger ◽  
Márta Jelitai ◽  
Gábor Mező ◽  
...  
Keyword(s):  
Stem Cells ◽  
Neural Stem Cells ◽  
Adult Mouse ◽  
Radial Glia

scholarly journals Neural Stem Cells: What Happens When They Go Viral?

Viruses ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1468
Author(s):  
Yashika S. Kamte ◽  
Manisha N. Chandwani ◽  
Alexa C. Michaels ◽  
Lauren A. O’Donnell
Keyword(s):  
Stem Cells ◽  
Neural Stem Cells ◽  
Viral Infections ◽  
Wide Spectrum ◽  
Cell Types ◽  
Developmental Abnormalities ◽  
Multipotent Progenitor Cells ◽  
The Central Nervous System ◽  
Simplex Virus ◽  
The Brain

Viruses that infect the central nervous system (CNS) are associated with developmental abnormalities as well as neuropsychiatric and degenerative conditions. Many of these viruses such as Zika virus (ZIKV), cytomegalovirus (CMV), and herpes simplex virus (HSV) demonstrate tropism for neural stem cells (NSCs). NSCs are the multipotent progenitor cells of the brain that have the ability to form neurons, astrocytes, and oligodendrocytes. Viral infections often alter the function of NSCs, with profound impacts on the growth and repair of the brain. There are a wide spectrum of effects on NSCs, which differ by the type of virus, the model system, the cell types studied, and the age of the host. Thus, it is a challenge to predict and define the consequences of interactions between viruses and NSCs. The purpose of this review is to dissect the mechanisms by which viruses can affect survival, proliferation, and differentiation of NSCs. This review also sheds light on the contribution of key antiviral cytokines in the impairment of NSC activity during a viral infection, revealing a complex interplay between NSCs, viruses, and the immune system.

Specific Roles of JAKs and STAT3 in Functions of Neural Stem Cells and Committed Neuronal Progenitors during Ethanol-Induced Neurodegeneration

2020 ◽  
Vol 168 (3) ◽  
pp. 356-360 ◽  
Author(s):  
G. N. Zyuz’kov ◽  
L. A. Miroshnichenko ◽  
T. Yu. Polyakova ◽  
L. A. Stavrova ◽  
E. V. Simanina ◽  
...  
Keyword(s):  
Stem Cells ◽  
Neural Stem Cells ◽  
Neuronal Progenitors

scholarly journals Integrated Patterning Programs During Drosophila Development Generate the Diversity of Neurons and Control Their Mature Properties

2021 ◽  
Vol 44 (1) ◽  
Author(s):  
Anthony M. Rossi ◽  
Shadi Jafari ◽  
Claude Desplan
Keyword(s):  
Stem Cells ◽  
Nervous System ◽  
Neural Stem Cells ◽  
Cell Types ◽  
Annual Review ◽  
Publication Date ◽  
Temporal Patterning ◽  
Long Time ◽  
Neuronal Types ◽  
And Control

During the approximately 5 days of Drosophila neurogenesis (late embryogenesis to the beginning of pupation), a limited number of neural stem cells produce approximately 200,000 neurons comprising hundreds of cell types. To build a functional nervous system, neuronal types need to be produced in the proper places, appropriate numbers, and correct times. We discuss how neural stem cells (neuroblasts) obtain so-called area codes for their positions in the nervous system (spatial patterning) and how they keep time to sequentially produce neurons with unique fates (temporal patterning). We focus on specific examples that demonstrate how a relatively simple patterning system (Notch) can be used reiteratively to generate different neuronal types. We also speculate on how different modes of temporal patterning that operate over short versus long time periods might be linked. We end by discussing how specification programs are integrated and lead to the terminal features of different neuronal types. Expected final online publication date for the Annual Review of Neuroscience, Volume 44 is July 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

scholarly journals Spatio-Temporal Recruitment Of Adult Neural Stem Cells For Transient Neurogenesis During Pregnancy

2021 ◽  
Author(s):  
Zayna Chaker ◽  
Corina Segalada ◽  
Fiona Doetsch
Keyword(s):  
Stem Cells ◽  
Olfactory Bulb ◽  
Neural Stem Cells ◽  
Adult Mouse ◽  
Life Experiences ◽  
Brain Plasticity ◽  
Perinatal Care ◽  
Adult Mouse Brain ◽  
Spatio Temporal ◽  
Care Period

Neural stem cells (NSCs) in the adult mouse brain contribute to lifelong brain plasticity. NSCs in the adult ventricular-subventricular zone (V-SVZ) are heterogeneous and, depending on their location in the niche, give rise to different subtypes of olfactory bulb interneurons. Here, we show that during pregnancy multiple regionally-distinct NSCs are dynamically recruited at different times. Coordinated temporal activation of these NSC pools generates sequential waves of short-lived olfactory bulb interneuron subtypes that mature in the mother around birth and in the perinatal care period. Concomitant with neuronal addition, oligodendrocyte progenitors also transiently increase in the olfactory bulb. Thus, life experiences, such as pregnancy, can trigger transient neurogenesis and gliogenesis under tight spatial and temporal control, and may provide a novel substrate for brain plasticity in anticipation of temporary physiological demand.

scholarly journals Human Neural Stem Cells Differentiate and Integrate, Innervating Implanted zQ175 Huntington’s Disease Mouse Striatum

2021 ◽  
Author(s):  
Sandra M. Holley ◽  
Jack C. Reidling ◽  
Carlos Cepeda ◽  
Alice Lau ◽  
Cindy Moore ◽  
...  
Keyword(s):  
Stem Cells ◽  
Neural Stem Cells ◽  
Huntington's Disease ◽  
Huntington’S Disease ◽  
Pyramidal Neurons ◽  
Neurodegenerative Disorder ◽  
Functional Integration ◽  
Behavioral Deficits ◽  
Human Neural Stem Cells ◽  
Neuronal Populations

AbstractHuntington’s disease (HD), a genetic neurodegenerative disorder, primarily impacts the striatum and cortex with progressive loss of medium-sized spiny neurons (MSNs) and pyramidal neurons, disrupting cortico-striatal circuitry. A promising regenerative therapeutic strategy of transplanting human neural stem cells (hNSCs) is challenged by the need for long-term functional integration. We previously described that hNSCs transplanted into the striatum of HD mouse models differentiated into electrophysiologically active immature neurons, improving behavior and biochemical deficits. Here we show that 8-month implantation of hNSCs into the striatum of zQ175 HD mice ameliorates behavioral deficits, increases brain-derived neurotrophic factor (BDNF) and reduces mutant Huntingtin (mHTT) accumulation. Patch clamp recordings, immunohistochemistry and electron microscopy demonstrates that hNSCs differentiate into diverse neuronal populations, including MSN- and interneuron-like cells. Remarkably, hNSCs receive synaptic inputs, innervate host neurons, and improve membrane and synaptic properties. Overall, the findings support hNSC transplantation for further evaluation and clinical development for HD.

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