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Kif2a operates as a gatekeeper of nociception in sensory neurons [RNA-seq - 1 month]

ABSTRACT: Kif2a operates as a gatekeeper of nociception in sensory neurons [RNA-seq - 1 month]

PROVIDER: PRJNA1004224 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25620136.fastq.gz	Fastqsanger.gz
	SRR25620137.fastq.gz	Fastqsanger.gz
	SRR25620138.fastq.gz	Fastqsanger.gz
	SRR25620139.fastq.gz	Fastqsanger.gz
	SRR25620140.fastq.gz	Fastqsanger.gz

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Kif2a operates as a gatekeeper of nociception in sensory neurons

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Kif2a operates as a gatekeeper of nociception in sensory neurons [RNA-seq - 6 months]

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Wnt signaling recruits KIF2A to the spindle to ensure chromosome congression during mitosis

Project description:Canonical Wnt signaling plays critical roles in development and tissue renewal by regulating β-catenin target genes. Recent evidence showed that β-catenin-independent Wnt signaling is also required for faithful execution of mitosis. This mitotic Wnt signaling functions through Wnt-dependent stabilization of proteins (Wnt/STOP), as well as through components of the LRP6 signalosome. However, the targets and specific functions of mitotic Wnt signaling still remain uncharacterized. Using phosphoproteomics, we identified that Wnt signaling regulates the microtubule depolymerase KIF2A during mitosis. We found that Dishevelled recruits KIF2A via its N-terminal and motor domains, which is further promoted upon LRP6 signalosome formation during mitosis. We show that Wnt signaling modulates KIF2A interaction with PLK1, which is critical for KIF2A localization and the assembly of a bipolar mitotic spindle. Accordingly, Wnt signaling promotes chromosome congression during metaphase by monitoring KIF2A protein levels at the spindle poles both in somatic cells and in pluripotent stem cells. Our findings highlight a novel function of Wnt signaling during cell division, which could have important implications for genome maintenance, notably in stem cells.

2021-11-17 | PXD022724 | Pride

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Project description:Rac1, a member of the small G protein Rho family, has been implicated in neurodegenerative diseases. However, its role in axon degeneration is not fully understood. Here we found that activation of Rac1 exacerbated axonal transport damage in an experimental glaucoma model. Inhibiting Rac1 activity by genetic or pharmacological methods alleviated the dysfunction of axonal transport and improved the integrity of microtubule by upregulating the expression of β-III tubulin and myelin basic protein. Rac1 interacted with Sirt1, a key molecule of Wallerian degeneration, which regulated the activity of PAK1, a downstream molecule of Rac1. Furthermore, Rac1 modulated Kif motors at the transcriptional level, among which Kif2a, a lysosome-location regulator, was negatively regulated by Rac1. Intravitreal injection of Kif2a siRNA reversed the improvement of Rac1 inhibition-mediated axonal transport through reducing autophagolysosomes. Our results suggest that Rac1/Kif2a accelerates the process of RGC axon degeneration by impairing the autophagic flux in glaucoma, which may be an intriguing therapy target for glaucoma.

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Project description:Sensitivity to different pain modalities has a genetic basis that remains largely unknown. The use of closely related inbred mouse strains can facilitate gene mapping of nociceptive behaviors in preclinical pain models. We previously reported enhanced sensitivity to acute thermal nociception in C57BL/6J (B6J) versus C57BL/6N (B6N) substrains. Here, we expanded on pain phenotypes and observed an increase in inflammatory nociceptive behaviors induced by hindpaw formalin injections in B6J versus B6N mice (Charles River Laboratories). No strain differences were observed in mechanical or thermal hypersensitivity or in paw diameter following the Complete Freund s Adjuvant (CFA) model of inflammatory pain, indicating specificity in the inflammatory nociceptive stimulus. In the chronic nerve constriction injury (CCI), a model of neuropathic pain, no strain differences were observed in baseline mechanical threshold or in mechanical hypersensitivity up to one month post-CCI. We replicated the enhanced thermal nociception in B6J mice in the 52.5 C hot plate test relative to B6N mice from The Jackson Laboratory. Using a B6J x B6N-F2 cross (N=164), we mapped a major QTL underlying hot plate sensitivity to chromosome 7 that peaked at 26 Mb (LOD = 3.81, 8.74 Mb-36.50 Mb) that was more pronounced in males. Genes containing expression QTLs (eQTLs) associated with the peak nociceptive marker that have been implicated in pain and inflammation include Ryr1, Cyp2a5, Pou2f2, Clip3, Sirt2, Actn4, and Ltbp4 (FDR < 0.05). Future studies involving positional cloning and gene editing will determine the quantitative trait gene(s) and potential pleiotropy of this locus across other pain modalities. RNA-seq data and genotype information from striatum punches of F2 C57BL/6J (B6J) cross C57BL/NJ (B6NJ) oxycodone-treated mice. Genotypes are given relative to B6J allele, eg 0 = homozygous B6J.

2018-11-26 | GSE119719 | GEO

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