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Changes in total RNA in BK deficient mice after 4h sleep deprivation [pools]

ABSTRACT: Animals deficient for the alpha subunit of the large conductance calcium dependent potassium channel (BK) were sleep deprived for 4 hours and compared to wildtype littermates as well as animals (wildtype littermate and BK deficient) left undisturbed for the same time.

ORGANISM(S): Mus musculus

PROVIDER: GSE132075 | GEO | 2019/07/31

REPOSITORIES: GEO

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Changes in total RNA in BK deficient mice after 4h sleep deprivation [individuals]

Project description:Animals deficient for the alpha subunit of the large conductance calcium dependent potassium channel (BK) were sleep deprived for 4 hours and compared to wildtype littermates as well as animals (wildtype littermate and BK deficient) left undisturbed for the same time.

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Changes in total RNA in BK deficient mice after 4h sleep deprivation

Project description:This SuperSeries is composed of the SubSeries listed below.

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Targeting Bradykinin Signaling Pathway: PLGA/BK Microspheres as a Therapeutic Strategy for Delaying Intervertebral Disc Degeneration

Project description:Intervertebral disc degeneration(IVDD) is a common spinal condition with limited effective treatments available. This study aims to investigate the impact of poly(lactic-co-glycolic acid)/Bradykinin (PLGA/BK) microspheres on IVDD and its underlying mechanisms. We collected nucleus pulposus samples from both healthy and degenerated human intervertebral discs and conducted immunohistochemical analyses, revealing reduced BK expression in degenerated tissues. Subsequently, we used BK to treat nucleus pulposus cells and conducted Bulk RNA sequencing (RNA-seq), identifying BK's involvement in cellular senescence, extracellular matrix metabolism, and the PI3K signaling pathway. Further experiments using tert-butyl hydroperoxide (TBHP)-induced cell senescence showed that BK treatment reduced senescence, enhanced extracellular matrix synthesis, and inhibited degradation, along with activation of the PI3K pathway. These effects were mediated through B2R (BK receptor 2) and the downstream PI3K pathway. Following this, we developed sustained-release BK microspheres with an optimized manufacturing process. In vitro co-culture experiments showed no observable toxicity. We established an IVDD model in rat tail vertebrae through fine needle puncture, administering local injections of BK sustained-release microspheres. Using various experimental methods, including X-ray, MRI, histopathology, and immunohistochemistry, we found that these microspheres could slow the progression of IVDD. This study highlights the potential of injectable PLGA/BK microspheres to regulate cellular senescence and extracellular matrix metabolism via the B2R and PI3K pathways, ultimately delaying IVDD.

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