Alberta Precision Laboratories

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Organization:

Alberta Precision Laboratories

Message Alert:

PLEASE NOTE: This Test Directory is in an interim state and due to changes pertaining to the DynaLIFE transition, performing site for routing has not been updated. Please refer to Laboratory Information System for appropriate routing.

Test Name/Synonym:

Chimerism Studies - Pre Transplant, Donor or Recipient

Clinical Indications:

Samples are required as pre-requisites for monitoring chimerism in patients undergoing future bone marrow transplant.

Test Includes:

Analysis of 16 polymorphic chromosomal loci (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D19S433, vWA, TPOX, D18S51, AMEL, D5S818, FGA).

Ordering Alert:

Answer Order Questions by indicating recipient or donor, and recipient’s name.

LABID (Connect Care):

LAB4401

Specimen Type:

Blood, Bone Marrow

Primary Container:

See Specimen Collection Requirements

Specimen Collection Requirements:

For Blood specimen	For Adults: Collect one yellow top ACD "A" or one lavender top EDTA tube containing a minimum of 1.0 mL of blood. For Pediatrics: Collect one full pediatric blue top Sodium Citrate tube.
For Bone Marrow specimen	Collect 0.5 mL of bone marrow in one Flow Bone Marrow Medium (BMM) or EDTA tube.

Test Resources:

Submit request using the applicable requisition or Connect Care online order entry:

For Bone Marrow Collections		For Peripheral Blood Collections
	Bone Marrow Collections: Bone Marrow Pathology Requisition		Flow Cytometry Requisition (22229) Complete Cell Sorting and Chimerism Investigation section of the requisition for Donor Recipient, Pre-transplant.

Please ensure all required information, including patient's clinical history/indication, is provided on the requisition.

Stability and Storage:

Refrigerate until ready for transport.

Processing:

Do not centrifuge or aliquot.
Do not freeze.

Transportation:

Transport specimens on ice or cold pack to Arthur J.E. Child Comprehensive Cancer Centre Molecular Pathology South within 24 hours of collection.

Method:

Multiplex PCR followed by capillary electrophoresis.

Method and Interpretation of Results:

Chimerism status is determined by amplification of short tandem tetranucleotide repeats with a panel of fluorochrome labelled primers at 16 chromosomal loci using the AmpFlSTR Identifiler Plus kit from Applied Biosystems (ABI). Amplified products are detected using the SeqStudio genetic analyzer. Pre-transplant recipient and donor allele patterns are compared to post-transplant recipient allele patterns. ABI Genemapper Software is used to determine the relative donor allele percentage.

Test sensitivity for detecting mixed chimerism by this method is routinely 3-5% minor allele as determined using in-house validation with defined mixtures of DNA.

Pre-transplant recipient and donor samples for chimerism studies are required as a comparison for post-transplant analysis of patient chimerism. Results of pre-transplant samples are not reported.

Routine Turn Around Time:

2 weeks

Testing Schedule:

Batched

Testing Area:

Molecular Pathology South

Performing Site:

Arthur J.E. Child Comprehensive Cancer Centre

Additional Test Information:

To obtain Bone Marrow Medium (BMM) tube, contact:

Flow Cytometry

587-231-3904

Contact Comments:

Molecular Pathology South 587-231-3199

Last Updated On:

Monday, March 17, 2025

Date of Last Review:

Oct 21 2024 12:00AM