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Restoration of impaired lysosomal function mitigates drusen-like deposits formation and cell death in Malattia Leventinese

GSE329104 Homo sapiens (human) RNA-seq (gene expression) 12 samples Submitted 2026/05/01 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
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.
Summary (written by the submitters)
Malattia Leventinese (MAL) is an inherited macular degeneration disorder characterized by retinal drusen formation in adolescence, leading to vision loss. A mutation in the fibulin-3 gene (EFEMP1) causes MAL; however, the mechanisms underlying disease onset and drusen formation remain unclear. In this study, we generated induced pluripotent stem cell-derived retinal pigment epithelial (iPSC-RPE) cells from a patient with MAL to investigate disease mechanisms and potential therapies.
Read the full summary ↓
MAL iPSC-RPE exhibited fibulin-3 and apolipoprotein E (ApoE) aggregation, increased endoplasmic reticulum stress, and enhanced apoptosis. Long-term culture with photoreceptor outer segments led to drusen-like deposits containing ApoE, complement components, collagen IV accumulation, and matrix metalloproteinase-2 (MMP2) activation. Untargeted lipid analysis revealed increased hexosylceramide and bis-monoacylglycerophosphate levels in MAL iPSC-RPE cells. A key pathological feature was lysosomal dysfunction associated with altered regulation of lysosomal gene programs, including reduced transcription factor EB transcript levels. Treatment with trehalose, a lysosome-modulating compound, increased lysosomal content and function, reducing drusen-like deposits formation, inhibiting MMP2 activation, and suppressing apoptosis. This study highlighted lysosomal dysfunction as a contributor to RPE damage, drusen-like deposits accumulation, and extracellular matrix degradation. Pharmacological restoration of lysosomal function alleviated these defects, suggesting therapeutic potential for MAL and other drusen-related diseases, including age-related macular degeneration.
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 GSE329104_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 PRJNA1457992 and SRA study SRP695078. Searching any of these in the dataset finder brings you back here.

Samples in this study

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