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Profiling of gene expression in the brain associated with anxiety-related behaviors in the chronic phase following cranial irradiation

ABSTRACT: Profiling of gene expression in the brain associated with anxiety-related behaviors in the chronic phase following cranial irradiation

PROVIDER: PRJNA843035 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19430480_1.fastq.gz	Fastqsanger.gz
	SRR19430480_2.fastq.gz	Fastqsanger.gz
	SRR19430481_1.fastq.gz	Fastqsanger.gz
	SRR19430481_2.fastq.gz	Fastqsanger.gz
	SRR19430482_1.fastq.gz	Fastqsanger.gz

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Cranial Irradiation Impairs Juvenile Social Behavior and Modulates Hippocampal Physiology

Project description:Cranial and craniospinal irradiation are the oldest central nervous system prophylaxis treatments considered for pediatric patients with lymphoblastic leukemia (ALL). However, survivors of childhood ALL that received cranial radiotherapy are at increased risk for deficits in neurocognitive skills. The continuous and dynamic response of normal tissue after irradiation has been identified as one of the causative factors for cognitive changes after cranial radiation therapy. The aim of our study was to investigate the radiation effects on social behavior and neuronal morphology in the hippocampus of adult mice. Twenty-one-day-old male C57BL/6 mice were irradiated with the small-animal radiation research platform (SARRP). Animals were given a single 10-Gy dose of radiation of X-ray cranial radiation. One month following irradiation, animals underwent behavioral testing in the Three-Chamber Sociability paradigm. Radiation affected social discrimination during the third stage eliciting an inability to discriminate between the familiar and stranger mouse, while sham successfully spent more time exploring the novel stranger. Proteomic analysis revealed dysregulation of metabolic and signaling pathways associated with neurocognitive dysfunction such as mitochondrial dysfunction, Rac 1 signaling, and synaptogenesis signaling. We observed significant decreases in mushroom spine density in the Cornu Ammonis 2 of the hippocampus, which is associated sociability processing.

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Project description:Healthy adult male C57BL/6 mice (8 weeks of age) were randomly divided into sham irradiation group (sham) and cranial ir-radiation group (5 Gy  4 d). For the 5 Gy  4 d group, the head of mice were received 20 Gy X-rays (RAD Source RS 2000 series, Suwanee, USA), applied as four doses of 5 Gy in consecutive 4 days at a dose rate of 2.33 Gy/ min. The rest of mouse’s body was completely protected by a 2-cm thick lead shield. For the sham group, the mice were maintained in the same procedure except X-ray irradiation. No radiation leakage through the shield occurred in the present study, as verified by dose measurement of testis under shielding and morphological structure of peripheral main organs. Meanwhile, Monte Carlo simulation was used to calculate the absorbed dose of the peripheral main organs when mice head was irradiated with 20 Gy X-rays. The results showed that the absorbed dose of testis under shielding was 0.018 Gy, which was only 0.9‰ of cranial absorbed dose. Tandem mass tag (TMT) quantitative proteomic analysis of testis at 4 W after cranial irradiation was carried out by LC-BIO Co., Ltd (Hangzhou, China). The differentially expressed proteins (DEPs) were screened and obtained using the cutoffs of fold change > 1.2 and P < 0.05. For bioinformatics analysis, Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis were performed using the DAVID 6.8 database (https://david.ncifcrf.gov/).

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Profiling of gene expression in the brain associated with anxiety-related behaviors in the chronic phase following cranial irradiation

Project description:By using RNA sequencing (RNA-seq), we analyzed gene expression profiles in the cortex and hippocampus of the adult brain to demonstrate the molecular mechanisms of radiation-induced brain dysfunction.

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Profiling of gene expression in the brain associated with anxiety-related behaviors in the chronic phase following cranial irradiation.

Project description:Although the brain is exposed to cranial irradiation in many clinical contexts, including malignant brain tumor therapy, such exposure can cause delayed neuropsychiatric disorders in the chronic phase. However, how specific molecular mechanisms are associated with irradiation-induced behavioral dysfunction, especially anxiety-like behaviors, is unclear. In the present study, we evaluated anxiety-like behaviors in adult C57BL/6 mice using the open-field (OF) and elevated plus maze (EPM) tests 3 months following single cranial irradiation (10 Gy). Additionally, by using RNA sequencing (RNA-seq), we analyzed gene expression profiles in the cortex and hippocampus of the adult brain to demonstrate the molecular mechanisms of radiation-induced brain dysfunction. In the OF and EPM tests, mice treated with radiation exhibited increased anxiety-like behaviors in the chronic phase. Gene expression analysis by RNA-seq revealed 89 and 106 differentially expressed genes in the cortex and hippocampus, respectively, following cranial irradiation. Subsequently, ClueGO and STRING analyses clustered these genes in pathways related to protein kinase activity, circadian behavior, and cell differentiation. Based on our expression analysis, we suggest that behavioral dysfunction following cranial irradiation is associated with altered expression of Cdkn1a, Ciart, Fos, Hspa5, Hspb1 and Klf10. These novel findings may provide potential genetic targets to investigate for the development of radioprotective agents.

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