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A phosphorylation switch within the Mediator subunit MED15 controls cellular senescence and cognitive decline [ChIP-seq]

GSE285137 Homo sapiens (human) ChIP-seq / ATAC-seq (genome binding and open chromatin) 10 samples Submitted 2025/08/27 Platform GPL24676
At a glance

ChIP-seq / ATAC-seq (genome binding and open chromatin) · human · 10 samples

What it is
ChIP-seq / ATAC-seq (genome binding and open chromatin)Where proteins bind the genome, or which regions are open and active.
Organism
Homo sapiens (human)
Samples
10 samples: 2 × MED15 T603A HaCaT, TGFβ3h, POLII ChIP, vs 2 × WT HaCaT, TGFβ3h, POLII ChIP, vs 2 × MED15 T603A HaCaT, TGFβ3h, FOXA1 ChIP,Groups are read from the sample names, not from the paper. Check the list below.
Data you can get
A processed table (series matrix) and supplementary files from NCBI; the raw sequencing reads from ENA. Which of these hold counts depends on the study, so check the file list.
Paper
A phosphorylation switch in the Mediator MED15 controls cellular senescence and cognitive declineCell discovery · 2025
Summary (written by the submitters)
A hallmark of aging is chronic systemic inflammation, which is exacerbated by the hypersecretory aging phenotype known as the senescence-associated secretory phenotype (SASP). How the SASP is initiated to accelerate tissue inflammation and aging is an outstanding question in ageing biology. Here, we showed that phosphorylation of the mediator subunit MED15 at T603 is able to control the SASP and aging.
Read the full summary ↓
Transforming growth factor-β (TGFβ) selectively induces CDK1-mediated MED15 T603 phosphorylation to control SASP gene expression. The MED15 T603 dephosphorylated mutant (T603A) inhibits the SASP and cell senescence, whereas the T603 phosphorylation-mimicking mutant (T603D) has the opposite effect. Mechanistically, forkhead box protein A1 (FOXA1) preferentially binds to unphosphorylated but not phosphorylated MED15 at T603 to suppress SASP gene expression. Notably, aging mice harboring dephosphorylated mutation in this phosphosite exhibit improved learning and memory through the attenuation of the SASP across tissues. Overall, our study indicates that MED15 T603 phosphorylation serves as a control switch for SASP production, which underlies tissue aging and cognitive decline and provides a novel target for age-related pathology.
Published in
A phosphorylation switch in the Mediator MED15 controls cellular senescence and cognitive decline
Li H, Zheng Y, Yuan C et al. · Cell discovery 2025 · PMID 40825935 · doi:10.1038/s41421-025-00820-1
This dataset
Download · which file do I need?

Direct links to NCBI and ENA, no account and no request form. Pick by what you want to do: take the small processed table to look, the supplementary files to re-analyse, or the original raw data to start over.

1 · Just have a look

Processed table

The series matrix: one table of values per sample as the submitters processed it. The smallest download, and it opens in Excel or R. Start here to see what the data look like.

2 · Re-analyse it

Supplementary files

The count tables and other files the authors uploaded. Take only the samples you need, or the whole study as GSE285137_RAW.tar (it can run to tens of gigabytes).

3 · Start from the raw reads

Raw sequencing reads

The original FASTQ files, straight from the sequencer, held at ENA. Large, and you align them yourself, so only choose this if you need to re-process the study from scratch.

What the files usually look like: Look for peak files (.bed, .narrowPeak) and signal tracks (.bigWig) among the supplementary files; the raw reads are on ENA.

Also filed as BioProject PRJNA1201230 and SRA study SRP553072. Searching any of these in the dataset finder brings you back here.

Study design
2 × MED15 T603A HaCaT, TGFβ3h, POLII ChIP, vs 2 × WT HaCaT, TGFβ3h, POLII ChIP, vs 2 × MED15 T603A HaCaT, TGFβ3h, FOXA1 ChIP,

Supports a between-group comparison across 6 samples.

How we read this: 3 replicated groups read from 10 sample titles; they account for 6 of them. These groups are guessed from the sample names, not taken from the paper, so check them against the sample list below before relying on them.

Samples in this study
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