Biomarker multi agent discovery

Biomarker Multi-Agent Discovery

When to use this skill

• Complex biomarker discovery requiring multiple analysis modalities
• Coordinating database queries with statistical survival analysis
• Synthesizing findings from literature, pathways, and clinical data into a biomarker panel
• Questions that span multiple sub-domains (e.g., "find best biomarker for survival in chemo patients and show evidence")

Architecture: Agents-as-Tools Pattern

The orchestrator dispatches to specialized sub-agents, each wrapped as a tool:

Orchestrator (Supervisor)
  |-- biomarker_database_analyst_agent  -> SQL queries on clinical genomic data
  |-- clinical_evidence_research_agent  -> PubMed + Knowledge Base search
  |-- statistician_agent                -> Survival regression, Kaplan-Meier plots
  |-- medical_imaging_agent             -> Radiomics biomarker extraction

Cross-agent data sharing uses AgentCore Memory: the database agent stores query results, and downstream agents (statistician) retrieve them automatically.

Orchestration Workflow

Step 1: Classify the user query

Map the question to required sub-agents:

Query type	Agents needed	Sequence
Demographics / counts	Database analyst only	Single call
Literature evidence	Clinical evidence researcher only	Single call
Statistical analysis (p-values, survival)	Database analyst -> Statistician	Sequential
Imaging biomarkers	Database analyst -> Medical imaging	Sequential
Comprehensive discovery	All agents	Multi-step
Pathway interpretation	Database analyst -> Literature	Sequential

Step 2: Execute database queries first

For any analysis requiring patient data:

1. Call biomarker_database_analyst_agent with the data retrieval question
2. Results are automatically stored in shared memory
3. Include required columns: survival_status, survival_duration, biomarker expression values

Example dispatch:

Query: "What are the top 5 biomarkers with overall survival for chemo patients?"
-> Database agent: "Query all records including survival status, survival duration in years, and gene expression values for patients where chemotherapy = 'Yes'"

Step 3: Feed results to downstream agents

For statistical analysis:

-> Statistician agent: "Fit a survival regression model on the query results"

The statistician retrieves data from memory automatically. No S3 path needed.

For visualization:

-> Statistician agent: "Generate a bar chart of the top 5 biomarkers by p-value"
-> Statistician agent: "Plot Kaplan-Meier curve for GDF15 with threshold 10"

For literature validation:

-> Clinical evidence researcher: "Search PubMed for evidence on GDF15 as a biomarker in NSCLC"

Step 4: Synthesize findings into ranked biomarker panel

Combine outputs from all agents into a consolidated report:

Biomarker Panel Report
=====================
1. [Gene] - p-value: X, HR: Y
   - Pathway: [from pathway analysis]
   - Literature: [N publications supporting]
   - Clinical significance: [interpretation]

2. [Gene] - p-value: X, HR: Y
   ...

Ranking criteria (in priority order):

1. Statistical significance (lowest p-value from Cox regression)
2. Clinical significance (hazard ratio magnitude)
3. Pathway relevance (membership in disease-associated pathways)
4. Literature support (number of supporting publications)
5. Biological plausibility (protein function matches disease mechanism)

Step 5: Generate actionable recommendations

For each top biomarker, provide:

• Measurement method (IHC, RNA-seq, blood test)
• Patient stratification threshold (expression cutoff)
• Potential clinical utility (prognostic vs. predictive vs. diagnostic)
• Next validation steps (cohort size, assay development)

Tool Dispatch Reference

Agent	Tools	Input	Output
Database Analyst	get_schema, query_redshift, refine_sql	Data question	Query results (auto-stored in memory)
Clinical Evidence	query_pubmed, retrieve	Evidence question	Literature summary with citations
Statistician	run_code, plot_kaplan_meier, fit_survival_regression	Analysis request	Regression, charts (S3 paths), p-values
Medical Imaging	compute_imaging_biomarker, analyze_imaging_biomarker	Patient IDs	Radiomics features (sphericity, elongation)

Example Multi-Step Sequences

"Find best biomarker for survival in chemo patients with visualization":

1. Database agent -> Statistician (Cox regression) -> Statistician (Kaplan-Meier) -> Literature -> Synthesize

"Compare imaging biomarkers for patients with lowest GDF15":

1. Database agent (find patients) -> Medical imaging (compute + visualize) -> Synthesize

Conventions

• Always explain the multi-step plan to the user before executing
• Present results from each agent separately, then provide consolidated summary
• Include S3 paths for any generated charts or images
• When agents fail, explain which step failed and what alternatives exist
• Medical/statistical concepts must be explained in accessible language
• Memory events expire after 3 days -- no manual cleanup needed