← BioTransfer GEO Dataset Finder
GEO series

LMNA p.H222P mutation causes contractile dysfunction via impaired mitochondrial calcium uptake in human cardiac laminopathy

GSE304575 Homo sapiens (human) RNA-seq (gene expression) 12 samples Submitted 2026/07/27 Platform GPL24676
At a glance

RNA-seq (gene expression) · human · 12 samples

What it is
RNA-seq (gene expression)Gene activity measured by sequencing. The summary does not mention single-cell work, so this is most likely bulk: one average per sample, the usual starting point for comparing groups.
Organism
Homo sapiens (human)
Samples
12 samples: 6 × hiPSC-CMs, Corrected Isogenic control, vs 6 × hiPSC-CMs, LMNAH222P,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
LMNA p.H222P mutation causes contractile dysfunction via impaired mitochondrial calcium uptake in human cardiac laminopathyCardiovascular research · 2026
Summary (written by the submitters)
Mutations in the LMNA gene, encoding lamin A/C, are implicated in laminopathies and can lead to dilated cardiomyopathy and heart failure. However, the underlying mechanisms remain unclear. Here, we generated human induced pluripotent stem cells-derived cardiomyocytes (hiPSC-CMs) from a patient carrying the LMNA p.His222Pro (c.665A>C) mutation and an isogenic CRISPR/Cas9-corrected control.
Read the full summary ↓
Although differentiation efficiency and sarcomere organization were comparable, 3D cardiac organoids composed of LMNA mutant hiPSC-CMs displayed significantly reduced contractility compared to control organoids. Transcriptomic, biochemical and functional analyses revealed impaired mitochondrial calcium uniporter (MCU) complex activity in LMNA mutant hiPSC-CMs, marked by decreased MCU expression, an elevated MICU1:MCU ratio, and increased phosphorylation of pyruvate dehydrogenase (PDH) at Ser232 and PDH Ser300 – indicative of reduced mitochondrial calcium uptake. These defects were accompanied by decreased mitochondrial respiration and ATP production. Notably, treatment with the MCU activator amorolfine restored mitochondrial calcium uptake and contractility in LMNA mutant hiPSC-CMs. These findings identify mitochondrial calcium dysregulation as a key downstream consequence of the LMNA p.H222P mutation. Our results establish a mechanistic link between LMNA-associated cardiomyopathy and impaired mitochondrial function, highlighting the MCU complex as a potential therapeutic target in human cardiac laminopathy.
Published in
LMNA p.H222P mutation causes contractile dysfunction via impaired mitochondrial calcium uptake in human cardiac laminopathy
Seguret M, Jouve C, Ruiz-Velasco A et al. · Cardiovascular research 2026 · PMID 42478871 · doi:10.1093/cvr/cvag163
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 GSE304575_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: For RNA-seq the counts are usually a table among the supplementary files (look for 'counts', 'expression', 'FPKM' or 'TPM' in the file name). The series matrix of a sequencing study is sometimes nearly empty.

Also filed as BioProject PRJNA1301814 and SRA study SRP606578. Searching any of these in the dataset finder brings you back here.

Study design
6 × hiPSC-CMs, Corrected Isogenic control, vs 6 × hiPSC-CMs, LMNAH222P,

Supports a between-group comparison across 12 samples.

How we read this: 2 replicated groups read from 12 sample titles; they account for 12 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
Datasets on a similar topic

Search all human RNA-seq datasets in GEO →

Share this dataset

Metadata from NCBI GEO, cached and refreshed periodically — the NCBI page above is authoritative. Downloads link straight to NCBI/ENA; nothing is proxied through BioTransfer.