The hypothalamus in the brain plays a pivotal role in controlling energy balance in vertebrates. Nutritional excess through high-fat diet (HFD) feeding can dysregulate hypothalamic signaling at multiple levels. Yet, it remains largely unknown in what magnitude HFD feeding may impact epigenetics in this brain region. Here, it is shown that HFD feeding can significantly alter hypothalamic epigenetic events, including posttranslational histone modifications, DNA methylation, and chromatin accessibility. The authors comprehensively analyze the chromatin immunoprecipitation-sequencing (ChIP-seq), methylated DNA immunoprecipitation-sequencing (MeDIP-seq), single nucleus assay for transposase-accessible chromatin using sequencing (snATAC-seq), and RNA-seq data of the hypothalamus of C57 BL/6 mice fed with a chow or HFD for 1 to 6 months. The chromatins are categorized into 6 states using the obtained ChIP-seq data for H3K4me3, H3K27ac, H3K9me3, H3K27me3, and H3K36me3. A 1-month HFD feeding dysregulates histone modifications and DNA methylation more pronouncedly than that of 3- or 6-month. Besides, HFD feeding differentially impacts chromatin accessibility in hypothalamic cells. Thus, the epigenetic landscape is dysregulated in the hypothalamus of dietary obesity mice.
Keyphrases
- high fat diet
- dna methylation
- single cell
- genome wide
- rna seq
- insulin resistance
- gene expression
- high fat diet induced
- high throughput
- adipose tissue
- metabolic syndrome
- skeletal muscle
- copy number
- dna damage
- type diabetes
- transcription factor
- weight loss
- electronic health record
- induced apoptosis
- big data
- circulating tumor cells
- cell cycle arrest
- machine learning
- white matter
- cell death
- multiple sclerosis
- brain injury
- oxidative stress
- signaling pathway
- cerebral ischemia
- body mass index
- wild type
- endoplasmic reticulum stress
- deep learning