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RNA-seq of NSC11 GSCs in the olfactory bulb (OB) compared to the right hemisphere (RH)

ABSTRACT: RNA-seq analysis of NSC11 GSCs present in the OB compared to the RH to analyse the influence of the brain microenvironment to the tumor cells gene expression.

ORGANISM(S): Homo sapiens

PROVIDER: GSE212161 | GEO | 2022/12/14

REPOSITORIES: GEO

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RNA-seq of NSC11 GSCs in the olfactory bulb (OB) compared to the right hemisphere (RH)

Project description:RNA-seq of NSC11 GSCs in the olfactory bulb (OB) compared to the right hemisphere (RH)

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olfactory bulb from control mouse and a mouse with developmentally-induced olfactory bulb degeneration

Project description:The olfactory bulb (OB) is a critical component of mammalian olfactory neuroanatomy. Beyond being the first and sole relay station for olfactory information to the rest of the brain, it also contains elaborate stereotypical circuitry that is considered essential for olfaction. Indeed, substantial lesions of the OB in rodents lead to anosmia. Here, we examined the circuitry that underlies olfaction in a mouse model with severe developmental degeneration of the OB. These mice could perform odor-guided tasks and even responded normally to innate olfactory cues. Despite the near total loss of the OB, piriform cortex in these mice responded to odors normally and its neural activity sufficed to decode odor identity. We found that sensory neurons expressthe full repertoire of olfactory receptors and their axons project primarily to the rudiments of the OB, but also ectopically, to olfactory cortical regions. Within the OB, the number of principal neurons was greatly reduced and the morphology of their dendrites was abnormal, extending over large regions within the OB. Glomerular organization was totally lost in the severe cases of OB degeneration and altered in the more conserved OBs, and the transcriptional profile of the glomerular layer was highly inflammatory. This study shows that olfactory functionality can be preserved despite reduced and aberrant circuitry that is missing many of the elements that are believed to be essential for olfaction, and may explain reported retention of olfaction in humans with degenerated OBs

2023-09-04 | GSE241951 | GEO

Olfactory bulb proteomics in human Alzheimer's disease

Project description:Olfactory dysfunction is among the earliest features of Alzheimer´s disease (AD). Although neuropathological abnormalities have been detected in the olfactory bulb (OB), little is known about its dynamic biology. Here, OB- proteome analysis was performed across different AD stages using a label-free approach.

2018-01-16 | PXD005319 | Pride

Comparative Gene Expression Profiling of Olfactory Ensheathing Cells from Olfactory Bulb and Olfactory Mucosa

Project description:The aim of this study was to use global gene expression profiling to define intrinsic molecular differences that distinguish olfactory ensheathing cells from mucosa (OM-OECs) from olfactory ensheathing cells from olfactory bulb (OB-OECs). 10,000 OECs from olfactory mucosa (OM) or olfactory bulb (OB) were isolated from 4 rats.

2009-12-02 | GSE19250 | GEO

Gene expression in the GWAT of ob/ob and ob/ob/Fsp27-/- mice

Project description:GWAT store most of the TAG in mice, ob/ob mice is an obese mice. Ob/ob/Fsp27-/- mice are lean when compared with ob/ob mice. The GWAT weight was dramatically reduced in ob/ob/Fsp27-/- mice. We next extract the total RNA from the GWAT of ob/ob and ob/ob/Fsp27-/- mice, to perform microaary analysis using Mouse Genome 430 2.0 arrays, Affymetrix. We then analysised the up-regulated and down regulated pathways.

2015-04-17 | GSE59807 | GEO

Parasite gene expression differences between RH-ERP, RH-JSR and GT1 of Toxoplasma gondii.

Project description:Parasite gene expression differences have been reported previously between RH-ERP, RH-JSR and GT1. To independently confirm these gene expression differences, we examined the parasite gene expression profiles of RH-ERP, RH-JSR and GT1 through microarray.

2013-08-20 | GSE44191 | GEO

Odor-Induced Neuronal Rhythms in the Olfactory Bulb Are Profoundly Modified in ob/ob Obese Mice.

Project description:Leptin, the product of the Ob(Lep) gene, is a peptide hormone that plays a major role in maintaining the balance between food intake and energy expenditure. In the brain, leptin receptors are expressed by hypothalamic cells but also in the olfactory bulb, the first central structure coding for odors, suggesting a precise function of this hormone in odor-evoked activities. Although olfaction plays a key role in feeding behavior, the ability of the olfactory bulb to integrate the energy-related signal leptin is still missing. Therefore, we studied the fate of odor-induced activity in the olfactory bulb in the genetic context of leptin deficiency using the obese ob/ob mice. By means of an odor discrimination task with concomitant local field potential recordings, we showed that ob/ob mice perform better than wild-type (WT) mice in the early stage of the task. This behavioral gain of function was associated in parallel with profound changes in neuronal oscillations in the olfactory bulb. The distribution of the peaks in the gamma frequency range was shifted toward higher frequencies in ob/ob mice compared to WT mice before learning. More notably, beta oscillatory activity, which has been shown previously to be correlated with olfactory discrimination learning, was longer and stronger in expert ob/ob mice after learning. Since oscillations in the olfactory bulb emerge from mitral to granule cell interactions, our results suggest that cellular dynamics in the olfactory bulb are deeply modified in ob/ob mice in the context of olfactory learning.

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Gene expression in the GWAT of ob/ob and ob/ob/Fsp27-/- mice

2015-04-17 | E-GEOD-59807 | biostudies-arrayexpress

Gene Expression in the BAT and WAT of ob/ob and ob/ob/Cidea-/-/Cidec-/- mice

Project description:ob/ob mice is an obese mice. CIDE family proteins including Cidea, Cideb and Cidec play important role in lipid metabolism. Cidea is mainly expressed in the brown adipose tissue (BAT). Cidec is mainly expressed in the BAT and white adipose tissue (WAT). We generated ob/ob/Cidea-/-/Cidec-/- mice to investigate the phenotype of fat tissue. ob/ob/Cidea-/-/Cidec-/- mice are lean when compared with ob/ob mice. The tissue weight and TAG content of BAT and WAT was extreamly decreased in ob/ob/Cidea-/-/Cidec-/- mice compared with that in ob/ob mice. We next extract the total RNA from the BAT and WAT of ob/ob and ob/ob/Cidea-/-/Cidec-/- mice, to perform microarray analysis using Mouse Gene 1.0 ST array system, Affymetrix. We then analysised the up-regulated and down regulated pathways.

2018-04-18 | GSE100989 | GEO

Olfactory bulb proteome characterization in APP/PS1 mice

Project description:Here we used double-transgenic amyloid precursor protein/presenilin 1 (APPswe/PS1dE9) mice and label-free quantitative proteomics to analyze potential early pathological effects on the olfactory bulb (OB) during AD progression.

2016-08-09 | PXD003683 | Pride

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