Dataset Information

A transcriptomic study reveals beneficial effects of HsTX1[R14A] on the cognition of a mouse model of sporadic Alzheimer’s disease

ABSTRACT: Increased expression of the voltage-gated potassium channel Kv1.3 in activated microglia and the subsequent release of pro-inflammatory mediators are closely associated with the progression of Alzheimer’s disease (AD). Studies have demonstrated that blockade of microglial Kv1.3 has the potential to improve cognitive function in mouse model of familial AD. Our laboratory has developed a potent and highly selective Kv1.3 peptide blocker, HsTX1[R14A]. This study aims to demonstrate the efficacy of HsTX1[R14A] in a mouse model of sporadic AD, the senescence accelerated mouse (SAMP8). SAMP8 mice were subcutaneously dosed with either PBS or HsTX1[R14A] (1 mg/kg) every other day from 4 months old for 8 weeks. We then performed gene expression profiling analysis using data obtained from RNA-seq of the brains collected from these mice at the conclusion of treatment.

ORGANISM(S): Mus musculus

PROVIDER: GSE221352 | GEO | 2023/05/11

REPOSITORIES: GEO

ACCESS DATA

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Project description:Voltage gated calcium channels play a central role in regulating the electrical and biochemical properties of neurons and muscle cells. Cells coordinate the expression of voltage gated calcium channels with the expression of other proteins that regulate membrane potential and calcium homeostasis. We report that the C-terminus of CaV 1.2, an L-type calcium channel (LTC) contains a C-terminal fragment that translocates to the nucleus and regulates transcription. This calcium channel associated transcription factor (CCAT) associates with transcriptional co-regulators such as p54nrb/NonO and binds to endogenous promoters. CCAT regulates the expression of gap junctions, sodium calcium exchangers, NMDA receptors, potassium channels and other proteins that regulate neuronal signaling. Electrical activity and developmental processes regulate the nuclear localization of CCAT, suggesting that the CCAT integrates information about the number of LTCs with information about the developmental history and electrical activity of a cell. These findings provide the first evidence that voltage gated calcium channels can directly activate transcription and suggest a novel mechanism linking voltage gated channels to the function and differentiation of excitable cells. Experiment Overall Design: The goal of these experiments was to identify the genes that are regulated by CCAT, a novel transcription factor derived from the C-terminus of CaV1.2. Neuro2A neuroblastoma cells were transfected with the last 503 AA of CaV1.2 which is full length CCAT (CCAT FL) or with the last 280 AA of CaV1.2, a form of CCAT that lacks the transcriptional activation domain (CCAT DTA). The mRNA from either CCAT FL or CCAT DTA expressing cells was hybridized to Agilent mouse genome microarrays along with mRNA from untransfected neuro2A cells (CCAT FL or DTA A series). Subsequent investigation revealed that transfection with the PA1 plasmid by itself increases the expression of some genes. To control for this effect we compared Neuro2A cells transfected with full length CCAT (in PA1) with Neuro2A cells transfectected with PA1 alone (CCAT FL B series). The microarray data was analyzed with the Rossetta Luminator gene expression data analysis system.

Dataset Information

A transcriptomic study reveals beneficial effects of HsTX1[R14A] on the cognition of a mouse model of sporadic Alzheimer’s disease

Dataset's files

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets