RNA sequencing is a rapidly emerging method for investigating the transcriptome. Over the past few decades, it has significantly progressed, becoming a paramount approach in transcriptome profiling. RNA-seq data is being utilized in multiple aspects of research and disease treatments. However, findability, usability, quality, and reliability have always been problematic for researchers and data scientists.
Though this is a very niche space, multiple platforms are being developed to facilitate the availability of RNA-seq data and do so in varying degrees of efficiency. Here we lay out a comparison between two such platforms operating in a similar space.
In this blog, we compare and discuss the difference between Elucidata’s ML-Ops platform Polly, and an online resource Recount3, as sources for uniformly processed and annotated RNAseq data.
Polly is a data-centric MLOps platform that hosts FAIR (Findable Accessible Interoperable and Reusable) multi-omics data from public and proprietary sources. Specific ETL pipelines called Connectors facilitate seamless data ingestion and harmonization. Polly’s curation infrastructure is built on a specialized BERT model, PollyBERT, that helps in metadata annotation.
Recount3 is an online resource that consists of uniformly processed RNA-seq data. It consists of RNA-seq gene, exon, and exon-exon junction counts as well as coverage bigWig files for 8,679 and 10,088 different studies for humans and mouse respectively. It is the third generation of the ReCount project and part of recount.bio.The raw sequencing data is processed with the Monorail system which generates the coverage bigWig files and the recount-unified text files. Furthermore, snapcount enables query-based access to the recount3 and recount2 data.
Let us dive deeper into understanding how these platforms work with the help of a few examples.
1. Querying Efficiency
Querying at GUI level for transcriptomics datasets Neurodegenerative diseases in humans.
Querying programmatically for Alzheimer's disease datasets with normal and patient samples.
2. How Easy Is It to Find Relevant Data?
3. How Easy Is It to Access the Data?
4. How Easy Is It to Integrate the Data with Other Data and Interoperate with Applications or Workflows for Analysis, Storage, and Processing?
Ratings out of 5
While both platforms are great sources for finding processed RNAseq data, it would be helpful to take a closer look to identify how they would serve particular users. It is very important for researchers and scientists to keep up with all the emerging data without having to spend a lot of time finding the relevant ones. It is thus preferable to have metadata backed with standard ontologies enabling superior search and findability. We hope this blog can help users make an informed choice between these platforms.
If you are spending time scouring datasets to just find out relevant ones for downstream analysis, now is the time to reach out. Connect with us to learn more about how to accelerate your research.
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Polly provides pre-processed, harmonized datasets that enable AI/ML model training for patient classification. It supports feature selection, dimensionality reduction, and validation workflows to build robust predictive models for precision medicine applications.
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Polly analyzes both single-cell and bulk multi-omics data to identify stage-specific genetic markers. By applying machine learning algorithms to detect patterns in gene expression, Polly helps researchers map lineage differentiation and gain insights into disease progression.
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Polly builds disease-specific atlases by:
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Polly integrates genomics, transcriptomics, proteomics, and clinical data into a unified, multi-dimensional view of patient populations. This helps researchers uncover complex biological relationships and enhances predictive modeling for patient subgroups.
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Yes, Polly automatically processes raw, unstructured data from public sources, addressing missing values, batch effects, and inconsistencies. Its machine learning–driven pipelines filter out noise and standardize data, ensuring higher-quality datasets for seamless analysis.
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Polly's harmonization engine normalizes, processes, and integrates diverse datasets using standard ontologies and metadata frameworks. This ensures consistency, removes batch effects, and enhances the reliability of downstream analyses for precise patient classification.
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Polly streamlines patient stratification by:
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Researchers encounter several challenges, including:
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Patient stratification is the process of categorizing patients into subgroups based on genetic, molecular, or clinical characteristics. This approach is crucial for precision medicine because it identifies which patient populations are most likely to respond to specific treatments, thereby improving therapeutic outcomes and reducing the risk of adverse effects.
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Polly provides access to a curated repository of RNA-seq datasets that are consistently processed and enriched with metadata. This harmonization allows researchers to efficiently search for datasets with similar transcriptional profiles, facilitating transcriptome profiling and biomarker identification.
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Polly utilizes signature reversal and multivariate gene expression signatures to predict potential drug combinations. By analyzing publicly available transcriptomics data and drug signatures, Polly can identify drugs or compounds that may have therapeutic effects by reversing disease signatures.
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Polly ranks similar datasets using cosine similarity scores, which measure how closely a dataset's transcriptional profile matches the query signature. This helps researchers quickly find relevant datasets for further analysis and validation.
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Researchers define the biological process of interest, select a dataset, preprocess the data, identify differentially expressed genes, and validate the signature. Polly’s platform streamlines this process with expert support and ML-ready datasets.
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Polly's RNA-Seq Atlas addresses challenges in extracting associated signatures from public databases by providing a curated resource of RNA-seq datasets collected from the Gene Expression Omnibus (GEO). This richly curated resource helps researchers to find datasets with similar transcriptional profiles to their gene sets of interest.
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Gene signature comparison analyzes gene expression patterns to identify disease-related signatures. It helps researchers find drugs that can reverse disease signatures, aiding in therapeutic discoveries.