tooluniverse-expression-data-retrieval

Gene Expression & Omics Data Retrieval

Retrieve gene expression experiments and multi-omics datasets with proper disambiguation and quality assessment.

IMPORTANT: Always use English terms in tool calls (gene names, tissue names, condition descriptions), even if the user writes in another language. Only try original-language terms as a fallback if English returns no results. Respond in the user's language.

Workflow Overview

Phase 0: Clarify Query (if ambiguous)
    ↓
Phase 1: Disambiguate Gene/Condition
    ↓
Phase 2: Search & Retrieve (Internal)
    ↓
Phase 3: Report Dataset Profile

---

Phase 0: Clarification (When Needed)

Ask the user ONLY if:

• Gene name is ambiguous (e.g., "p53" → TP53 or MDM2 studies?)
• Tissue/condition unclear for comparative studies
• Organism not specified for non-human research

Skip clarification for:

• Specific accession numbers (E-MTAB-, E-GEOD-, S-BSST*)
• Clear disease/tissue + organism combinations
• Explicit platform requests (RNA-seq, microarray)

---

Phase 1: Query Disambiguation

1.1 Gene Name Resolution

If searching by gene, first resolve official identifiers:

from tooluniverse import ToolUniverse
tu = ToolUniverse()
tu.load_tools()

# For gene-focused searches, resolve official symbol first
# This helps construct better search queries
# Example: "p53" → "TP53" (official HGNC symbol)

Gene Disambiguation Checklist:

• [ ] Official gene symbol identified (HGNC for human, MGI for mouse)
• [ ] Common aliases noted for search expansion
• [ ] Species confirmed

1.2 Construct Search Strategy

| User Query Type | Search Strategy |

|-----------------|-----------------|

| Specific accession | Direct retrieval |

| Gene + condition | "[gene] [condition]" + species filter |

| Disease only | "[disease]" + species filter |

| Technology-specific | Add platform keywords (RNA-seq, microarray) |

---

Phase 2: Data Retrieval (Internal)

Search silently. Do NOT narrate the process.

2.1 Search Experiments

# ArrayExpress search
result = tu.tools.arrayexpress_search_experiments(
    keywords="[gene/disease] [condition]",
    species="[species]",
    limit=20
)

# BioStudies for multi-omics
biostudies_result = tu.tools.biostudies_search_studies(
    query="[keywords]",
    limit=10
)

2.2 Get Experiment Details

For top results, retrieve full metadata:

# Get details for each relevant experiment
details = tu.tools.arrayexpress_get_experiment_details(
    accession=accession
)

# Get sample information
samples = tu.tools.arrayexpress_get_experiment_samples(
    accession=accession
)

# Get available files
files = tu.tools.arrayexpress_get_experiment_files(
    accession=accession
)

2.3 BioStudies Retrieval

# Multi-omics study details
study_details = tu.tools.biostudies_get_study_details(
    accession=study_accession
)

# Study structure
sections = tu.tools.biostudies_get_study_sections(
    accession=study_accession
)

# Available files
files = tu.tools.biostudies_get_study_files(
    accession=study_accession
)

Fallback Chains

| Primary | Fallback | Notes |

|---------|----------|-------|

| ArrayExpress search | BioStudies search | ArrayExpress empty |

| arrayexpress_get_experiment_details | biostudies_get_study_details | E-GEOD may have BioStudies mirror |

| arrayexpress_get_experiment_files | Note "Files unavailable" | Some studies restrict downloads |

---

Phase 3: Report Dataset Profile

Output Structure

Present as a Dataset Search Report. Hide search process.

# Expression Data: [Query Topic]

**Search Summary**
- Query: [gene/disease] in [species]
- Databases: ArrayExpress, BioStudies
- Results: [N] relevant experiments found

**Data Quality Overview**: [assessment based on criteria below]

---

## Top Experiments

### 1. [E-MTAB-XXXX]: [Title]

| Attribute | Value |
|-----------|-------|
| **Accession** | [accession with link] |
| **Organism** | [species] |
| **Experiment Type** | RNA-seq / Microarray |
| **Platform** | [specific platform] |
| **Samples** | [N] samples |
| **Release Date** | [date] |

**Description**: [Brief description from metadata]

**Experimental Design**:
- Conditions: [treatment vs control, etc.]
- Replicates: [N biological, M technical]
- Tissue/Cell type: [if specified]

**Sample Groups**:
| Group | Samples | Description |
|-------|---------|-------------|
| Control | [N] | [description] |
| Treatment | [N] | [description] |

**Data Files Available**:
| File | Type | Size |
|------|------|------|
| [filename] | Processed data | [size] |
| [filename] | Raw data | [size] |
| [filename] | Sample metadata | [size] |

**Quality Assessment**: ●●● High / ●●○ Medium / ●○○ Low
- Sample size: [adequate/limited]
- Replication: [yes/no]
- Metadata completeness: [complete/partial]

---

### 2. [E-GEOD-XXXXX]: [Title]
[Same structure as above]

---

## Multi-Omics Studies (from BioStudies)

### [S-BSST-XXXXX]: [Title]

| Attribute | Value |
|-----------|-------|
| **Accession** | [accession] |
| **Study Type** | [proteomics/metabolomics/integrated] |
| **Organism** | [species] |
| **Samples** | [N] |

**Data Types Included**:
- [ ] Transcriptomics
- [ ] Proteomics
- [ ] Metabolomics
- [ ] Other: [specify]

---

## Summary Table

| Accession | Type | Samples | Platform | Quality |
|-----------|------|---------|----------|---------|
| [E-MTAB-X] | RNA-seq | [N] | Illumina | ●●● |
| [E-GEOD-X] | Microarray | [N] | Affymetrix | ●●○ |

---

## Recommendations

**For [specific analysis type]**:
- Best experiment: [accession] - [reason]
- Alternative: [accession] - [reason]

**Data Integration Notes**:
- Platform compatibility: [notes on combining datasets]
- Batch considerations: [if applicable]

---

## Data Access

### Direct Download Links
- [E-MTAB-XXXX processed data](link)
- [E-MTAB-XXXX raw data](link)

### Database Links
- ArrayExpress: https://www.ebi.ac.uk/arrayexpress/experiments/[accession]
- BioStudies: https://www.ebi.ac.uk/biostudies/studies/[accession]

Retrieved: [date]

---

Data Quality Tiers

Assessment criteria for expression experiments:

| Tier | Symbol | Criteria |

|------|--------|----------|

| High Quality | ●●● | ≥3 bio replicates, complete metadata, processed data available |

| Medium Quality | ●●○ | 2-3 replicates OR some metadata gaps, data accessible |

| Low Quality | ●○○ | No replicates, sparse metadata, or data access issues |

| Use with Caution | ○○○ | Single sample, no replication, outdated platform |

Include assessment rationale:

**Quality**: ●●● High
- ✓ 4 biological replicates per condition
- ✓ Complete sample annotations
- ✓ Processed and raw data available
- ✓ Recent RNA-seq platform

---

Completeness Checklist

Every dataset report MUST include:

Per Experiment (Required)

• [ ] Accession number with database link
• [ ] Organism
• [ ] Experiment type (RNA-seq/microarray/etc.)
• [ ] Sample count
• [ ] Brief description
• [ ] Quality assessment

Search Summary (Required)

• [ ] Query parameters stated
• [ ] Number of results
• [ ] Databases searched

Recommendations (Required)

• [ ] Best dataset for user's purpose (or "No suitable data found")
• [ ] Data access notes

Include Even If Empty

• [ ] Multi-omics studies section (or "No multi-omics studies found")
• [ ] Data integration notes (or "Single-platform data, no integration needed")

---

Common Use Cases

Disease Gene Expression

User: "Find breast cancer RNA-seq data"

result = tu.tools.arrayexpress_search_experiments(
    keywords="breast cancer RNA-seq",
    species="Homo sapiens",
    limit=20
)

→ Report top experiments with quality assessment

Gene-Specific Studies

User: "Find TP53 expression experiments in mouse"

result = tu.tools.arrayexpress_search_experiments(
    keywords="TP53 p53",  # Include aliases
    species="Mus musculus",
    limit=15
)

→ Report experiments studying this gene

Specific Accession Lookup

User: "Get details for E-MTAB-5214"

→ Single experiment profile with all details and files

Multi-Omics Integration

User: "Find proteomics and transcriptomics studies for liver disease"

→ Search both ArrayExpress and BioStudies, note integration potential

---

Error Handling

| Error | Response |

|-------|----------|

| "No experiments found" | Broaden keywords, remove species filter, try synonyms |

| "Accession not found" | Verify format (E-MTAB-, E-GEOD-, S-BSST*), check if withdrawn |

| "Files not available" | Note in report: "Data files restricted by submitter" |

| "API timeout" | Retry once, then note: "(metadata retrieval incomplete)" |

---

Tool Reference

ArrayExpress (Gene Expression)

| Tool | Purpose |

|------|---------|

| arrayexpress_search_experiments | Keyword/species search |

| arrayexpress_get_experiment_details | Full metadata |

| arrayexpress_get_experiment_files | Download links |

| arrayexpress_get_experiment_samples | Sample annotations |

BioStudies (Multi-Omics)

| Tool | Purpose |

|------|---------|

| biostudies_search_studies | Multi-omics search |

| biostudies_get_study_details | Study metadata |

| biostudies_get_study_files | Data files |

| biostudies_get_study_sections | Study structure |

---

Search Parameters Reference

ArrayExpress

| Parameter | Description | Example |

|-----------|-------------|---------|

| keywords | Free text search | "breast cancer RNA-seq" |

| species | Scientific name | "Homo sapiens" |

| array | Platform filter | "Illumina" |

| limit | Max results | 20 |

BioStudies

| Parameter | Description | Example |

|-----------|-------------|---------|

| query | Free text | "proteomics liver" |

| limit | Max results | 10 |