Biospecimen Lifecycle

Biospecimen

 

Pre-Acquisition - biospecimen Molecular Integrity Antibiotics and other drugs  
 Anesthesia: Type and Duration
 Arterial clamp time
 Blood loss pressure variations
 Blood and Fluid administration

 

Patient  - The biospecimen exists in situ within the specific biologic context of the patient.
 RCHSD Admission
 COTA
 Consented COTA Scan EMR?
 Daily List of Consented EPIC?

 

Medical/Surgical Procedures
 Examples include administration of antibiotics, anesthesia and other drugs. At this point anesthesiologists, nurses, and doctors may introduce variables into the procedue that change the biologic context of the "specimen" and, as a result, cause dynamic changes in the molecular profiles within the "specimen."
Warm Ischemia Time < 30 Minutes
Cold Ischemia Time 30 min < 2hr
On call transport specimen
Rapid Triage of Specimen

 

Acquisition
 Various methods of acquiring the "specimen" may introduce specific types of stress or trauma to the living specimen. Examples include time delays (from handling to delivery), and packaging (changing exposure to desiccation or oxidation.)
Unique study number Barcoding
Collection supervised by Rady Children's Pathologists
Asceptic technique
No thaw/Freeze Cycle - Aliquot

 

Handling/Processing
 Preparation variables introduced prior and during biologic stabilization of the specimen include: time @ RT, RT, type and time in fixative, method & rate of freezing, size of specimen aliquots. Human involvement contributes to this process.
Flash Freezing: LN2, OCT
Diseased tissue: Cancer/Non-cancer
Adjacent non diseased tissue
Controlled fixation

 

 Post-Acquisition
Transport and Handling
 Room Temp and Time spent at room temperature
 Freezing - storage temperature
 Fixative Type and Time spent in fixative

 

Quality Control/Assurance  
 H&E section of all banked tissue
 Review by board certified pathologists
 Correlate and Verify pathologic diagnosis
 Viable Tumor content score

 

Bioinformatics  
Velos/eResearch/eSample
Clinical data
Sample tracking
Inventory control

 

Storage
Variables include storage temperature, duration, progressive dehydration, desiccation and oxidation may contribute to this process.
CryPlus LN2 Storage
-80C Biomedical
Freezer Monitored 24/7
Emergency Response on-call
 Back up power and LN2

 

Distribution - Variation sin transport may lead to alterations in the specimen. Package, transport and receiving all contribute to this type of variations.
Access to materials electronic request
Investigator Application Instructions Agreement Package
Biobank Committee review and approval

Scientific Analysis

Different methods of analysis for various classes of biomolecules may be affected by any of the factors already mentioned. Even with a single analytical method, each individual investigator and technician involved in the specimen analysis may contribute to such variation.

Restocking

Environmental variables may be introduced through the return of unused samples from research laboratories to storage.

Effects on clinical outcomes:
• Morphological analysis/diagnosis
• Skewed clinical chemistry results
• Potential for incorrect therapy when diagnostic is paired with therapeutic (e.g., HER2)

Effects on research outcomes:
• Variations in gene expression
• Variations in post-translational modification (e.g., phosphorylation status)
• Potential for misinterpretation of artifacts as biomarkers