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Insulin signaling mediates neurodegeneration in glioma.

Patricia Jarabo | Carmen de Pablo | Héctor Herranz | Francisco Antonio Martín | Sergio Casas-Tintó
Life science alliance | 2021

Cell to cell communication facilitates tissue development and physiology. Under pathological conditions, brain tumors disrupt glia-neuron communication signals that in consequence, promote tumor expansion at the expense of surrounding healthy tissue. The glioblastoma is one of the most aggressive and frequent primary brain tumors. This type of glioma expands and infiltrates into the brain, causing neuronal degeneration and neurological decay, among other symptoms. Here, we describe in a Drosophila model how glioblastoma cells produce ImpL2, an antagonist of the insulin pathway, which targets neighboring neurons and causes mitochondrial disruption as well as synapse loss, both early symptoms of neurodegeneration. Furthermore, glioblastoma progression requires insulin pathway attenuation in neurons. Restoration of neuronal insulin activity is sufficient to rescue synapse loss and to delay the premature death caused by glioma. Therefore, signals from glioblastoma to neuron emerge as a potential field of study to prevent neurodegeneration and to develop anti-tumoral strategies.

Pubmed ID: 33526430

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GraphPad Prism (tool)

RRID:SCR_002798

Statistical analysis software that combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization. Designed for biological research applications in pharmacology, physiology, and other biological fields for data analysis, hypothesis testing, and modeling.

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Imaris (tool)

RRID:SCR_007370

Imaris provides range of capabilities for working with three dimensional images. Uses flexible editing and processing functions, such as interactive surface rendering and object slicing capabilities. And output to standard TIFF, Quicktime and AVI formats. Imaris accepts virtually all image formats that are used in confocal microscopy and many of those used in wide-field image acquisition.

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TargetScan (tool)

RRID:SCR_010845

Web tool to predict biological targets of miRNAs by searching for presence of conserved 8mer, 7mer and 6mer sites that match seed region of each miRNA. Nonconserved sites are also predicted and sites with mismatches in seed region that are compensated by conserved 3' pairing. Used to search for predicted microRNA targets in mammals.

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DSHB (tool)

RRID:SCR_013527

An antibody supplier which banks and distributes hybridomas and monoclonal antibodies for use in research. The bank includes antibodies against targets such as GFP, transcription factors, stem cells, and human.

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Adobe Photoshop (tool)

RRID:SCR_014199

Software for image processing, analysis, and editing. The software includes features such as touch capabilities, a customizable toolbar, 2D and 3D image merging, and Cloud access and options.

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w[118]; P{w[+mC]=tGPH}4 (organism)

RRID:BDSC_8164

Drosophila melanogaster with name w[118]; P{w[+mC]=tGPH}4 from BDSC.

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w[1118]; P{w[+m*]=GAL4}repo/TM3, Sb[1] (organism)

RRID:BDSC_7415

Drosophila melanogaster with name w[1118]; P{w[+m*]=GAL4}repo/TM3, Sb[1] from BDSC.

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w[1118]; P{y[+t7.7] w[+mC]=GMR27E08-lexA}attP40 (organism)

RRID:BDSC_52676

Drosophila melanogaster with name w[1118]; P{y[+t7.7] w[+mC]=GMR27E08-lexA}attP40 from BDSC.

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w[1118]; P{w[+mC]=UAS-myr-mRFP}2/TM6B, Tb[1] (organism)

RRID:BDSC_7119

Drosophila melanogaster with name w[1118]; P{w[+mC]=UAS-myr-mRFP}2/TM6B, Tb[1] from BDSC.

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y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=TRiP.HMC03863}attP40 (organism)

RRID:BDSC_55855

Drosophila melanogaster with name y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=TRiP.HMC03863}attP40 from BDSC.

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y[1] w[*]; Mi{y[+mDint2]=MIC}ImpL2[MI14001]/TM3, Sb[1] Ser[1] (organism)

RRID:BDSC_59246

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w[*]; P{w[+mC]=tubP-GAL80[ts]}20; TM2/TM6B, Tb[1] (organism)

RRID:BDSC_7019

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y[1] w[*] P{y[+t7.7] w[+mC]=lexAop-mCherry.mito.OMM}su(Hw)attP8 (organism)

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y[1] w[*]; Mi{y[+mDint2]=MIC}Thor[MI09732] (organism)

RRID:BDSC_53159

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w[*]; P{w[+mC]=UAS-lacZ.Exel}2 (organism)

RRID:BDSC_8529

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w[*]; P{w[+mW.hs]=GawB}D42 (organism)

RRID:BDSC_8816

Drosophila melanogaster with name w[*]; P{w[+mW.hs]=GawB}D42 from BDSC.

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