← BioTransfer GEO Dataset Finder
GEO series

Macrophage activation and invasion by Porphyromonas gingivalis is modulated by PPAD and accessory fimbriae subunits

GSE304218 Homo sapiens (human) RNA-seq (gene expression) 35 samples Submitted 2026/03/11 Platform GPL24676
At a glance

RNA-seq (gene expression) · human · 35 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
35 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.
Paper
Macrophage activation and invasion by P. gingivalis is modulated by PPAD and accessory fimbriae subunitsJournal of oral microbiology · 2026
Summary (written by the submitters)
Background: Porphyromonas gingivalis is a master manipulator of host immune responses in periodontium. Peptidyl arginine deiminase (PPAD), a recently described virulence factor of P. gingivalis, responsible for both host- and bacterium-derived proteins and peptides citrullination, also plays an important role in hijacking immune responses.
Read the full summary ↓
While PPAD’s modification of fimbrial subunits (FimCDE) affects TLR2 signaling in fibroblasts, its impact on immune cells remains unclear. Methods: Human monocyte-derived macrophages (MDMs) were stimulated with wild-type or mutant P. gingivalis strains and isolated fimbriae. Inflammatory responses were assessed by measuring cytokine expression and secretion, transcriptional changes using RNA-seq and Pi3K/Akt pathway activation, while bacterial invasion through flow cytometry, fluorescent microscopy and intracellular survival assay. Results: PPAD-modified fimbriae enhanced MDM proinflammatory responses, such as PGE2- related gene expression as well as cytokines secretion, while fimbriae from accessory subunit mutants failed to induce inflammation. PPAD modification of accessory fimbrial subunits was found to protect P. gingivalis from killing by macrophages. PPAD and accessory fimbriae subunits were involved in complex immune evasion strategies, upregulating genes associated with viral infections or interactions with T cells. Conclusions: These findings highlight the importance of protein citrullination in TLR2-dependent signaling and provide insight on how P. gingivalis subverts host immune responses.
Published in
Macrophage activation and invasion by P. gingivalis is modulated by PPAD and accessory fimbriae subunits
Wielento A, Drapała DM, Terekhova M et al. · Journal of oral microbiology 2026 · PMID 41788297 · doi:10.1080/20002297.2026.2638646
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 GSE304218_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 PRJNA1299399 and SRA study SRP605496. Searching any of these in the dataset finder brings you back here.

Samples in this study

The sample list for this study is not cached yet. Press Load samples and it will be fetched from NCBI.

+ 35 more — browse all 35 samples with per-sample file links →

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.