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Study of the signaling modulated by HDAC4 in skeletal muscle in ALS

ABSTRACT: Study of the signaling modulated by HDAC4 in skeletal muscle in ALS

PROVIDER: PRJNA498450 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8110284.fastq.gz	Fastqsanger.gz
	SRR8110285.fastq.gz	Fastqsanger.gz
	SRR8110286.fastq.gz	Fastqsanger.gz
	SRR8110287.fastq.gz	Fastqsanger.gz

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Study of the signaling modulated by HDAC4 in skeletal muscle in ALS

Project description:BACKGROUND: Histone deacetylase 4 (HDAC4) has been proposed as a target for the treatment of Amyotrophic Lateral Sclerosis (ALS) because it mediates nerve-skeletal muscle interaction and since its expression in skeletal muscle correlates with the severity of the disease. However, our recent studies on the skeletal muscle response upon long-term denervation highlighted the importance of HDAC4 in maintaining muscle integrity. METHODS: To fully identify the yet uncharacterized HDAC4 functions in ALS, we genetically deleted HDAC4 in skeletal muscles of a mouse model of ALS. Body weight, skeletal muscle, innervation and spinal cord were analyzed over time by morphological and molecular analyses. A transcriptome analysis was also performed to delineate the signaling modulated by HDAC4 in skeletal muscle of a mouse model of ALS. FINDINGS: HDAC4 deletion in skeletal muscle caused earlier ALS onset, characterized by body weight loss, muscle denervation and atrophy, and compromised muscle performance in ALS mice, although the main catabolic pathways were not activated. A transcriptome analysis identified the gene networks modulated by HDAC4 in ALS, revealing UCP1 as a top regulator that may be implicated in worsening ALS features. INTERPRETATION: HDAC4 plays an important role in preserving innervations and skeletal muscle in ALS, likely by modulating the UCP1 gene network. Our study highlights a possible risk in considering HDAC inhibitors for the treatment of ALS.

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Samples from mouse skeletal muscle

Project description:samples from mouse Skeletal Muscle, analysis different expression profiling<br>HDAC4：Sciatic nerve transection model was prepared after injection of HDAC4-shRNA lentivirus into the tibialis anterior muscle of mice. 14 days later, tibialis anterior muscle was obtained. DenSciatic nerve transection model was prepared after injection of empty vector virus into the tibialis anterior muscle of mice. 14 days later, tibialis anterior muscle was obtained. N: The empty vector virus was injected into muscles from the sham group. 14 days later, tibialis anterior muscle was obtained.

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Gene expression analysis of ALS skeletal muscle

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Hdac4 regulates proliferation of neural crest-derived osteoblasts during murine craniofacial development

Project description:Craniofacial development involves regulation of a compendium of transcription factors, signaling molecules and epigenetic regulators. Histone deacetylases (HDACs) are involved in the regulation of cell proliferation, differentiation and homeostasis across a wide range of tissues, such as brain, cardiovascular system, muscular system, and skeletal system. However, functional role of Hdac4 during craniofacial development is still unclear. In this study, we investigated the effects of Hdac4 knockout in craniofacial skeletal development by conditionally disrupting the Hdac4 gene in cranial neural crest cells (CNCCs) using Cre-mediated recombination. Mice deficient in Hdac4 in CNCCs-derived osteoblasts demonstrated a dramatic decrease in bone formation in frontal bone. In vitro pre-osteoblasts (MC3T3-E1 cells) lacking Hdac4 exhibited reduced proliferation activity in association with dysregulation of cell cycle-related genes. These findings suggest that Hdac4 acts partially as a regulator of craniofacial skeletal development by positively regulating proliferation of CNCCs-derived osteoblasts.

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Transcriptome analysis of satellite cells with a genetic deletion of HDAC4 to identify the gene modulated by HDAC4

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Transcriptome analysis of satellite cells with a genetic deletion of HDAC4 to identify the gene modulated by HDAC4

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Transcription profiling of skeletal muscle from amyotrophic lateral sclerosis sod1(G86R) axotomized mice and control mice to monitor denervation-dependent gene expression in an Amyotrophic lateral sclerosis (ALS) mouse model

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HDAC4 interactors identified by MS/MS

Project description:Access to DNA is the first level of control in regulating gene transcription, a control that is also critical for maintaining DNA integrity. Cellular senescence is characterized by profound transcriptional rearrangements and accumulation of DNA lesions. Here, we discovered an epigenetic complex between HDAC4 and HDAC1/HDAC2 that is involved in the erase of H2BK120 acetylation. The HDAC4/HDAC1/HDAC2 complex modulates the efficiency of DNA repair by homologous recombination, through dynamic deacetylation of H2BK120. Deficiency of HDAC4 leads to accumulation of H2BK120ac, impaired recruitment of BRCA1 and CtIP to the site of lesions, accumulation of damaged DNA and senescence. In senescent cells this complex is disassembled because of increased proteasomal degradation of HDAC4. Forced expression of HDAC4 during RAS-induced senescence reduces the genomic spread of γH2AX and affects H2BK120ac levels, which are increased in DNA-damaged regions accumulated during RAS-induced senescence. In summary, degradation of HDAC4 during senescence causes the accumulation of damaged DNA and contributes to the activation of the transcriptional program controlled by super-enhancers that maintains senescence.

2024-10-17 | PXD051316 | Pride

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