The PML-RARa fusion gene transcripts, which are the molecular result of the t(15;17)(q22;q21) translocation, are associated with the majority of APL cases (> 90%), a distinct AML subset with M3 cytomorphology. APL accounts for 10-15% of all AML cases.
The balanced reciprocal translocation t(15;17) leads to the fusion of the promyelocytic leukemia (PML) gene to the retinoic acid receptor alpha (RARa) to generate the PML-RARa fusion protein, a transcriptional repressor. Its expression is associated with impaired myeloid differentiation.
RARa breakpoints always occur in intron 2. Depending on the location of breakpoints within the PML site, intron 6, exon 6 and intron 3, the respective PML-RARa transcript subtypes referred to as long (L or bcr1), variant (V or bcr2) and short (S or bcr3), may be formed. They represent 55%, 5% and 40% of the cases respectively.
The analysis of the prognostic value of a well established standardized RQ-PCR protocol (EAC Program) in APL patients during different phases of treatment has indicated that this approach is a robust alternative for assessing MRD and that a relapse-risk stratification can be established based on PML-RARa normalized copy number.
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Ipsogen
FusionQuant® kits are unique molecular kits providing standardization and accurate quantification of fusion gene transcripts in leukemia.
FusionQuant® kit key points- Sensitive and quantitative measurement of the fusion transcript
- Determination of the expression level of the fusion transcript relative to the ABL, GUS or BCR control genes
- Facilities and QMS compliant with ISO 13485 : 2003
- Multi-instrument compatibility
- Ready to use pre-diluted solutions
- Reduced risk of contamination
- Validated standards for the specific fusion and control gene
- EAC Standardized RQ-PCR procedures
Ipsogen PML-RARA bcr1 FusionQuant® Kits are unique molecular kits providing standardization and accurate quantification of fusion gene transcripts in leukemia.
PML-RARA bcr1 FusionQuant® Kit key points
Clinical advantages
- Sensitive follow up of Minimal Residual Disease in patients under ATRA
- Standardized technology validated by a multicentric study (EAC network)
- Ready-to Use CE marked kit (PML-RARA bcr1) for IVD
- Relapse-risk stratification can be established based on PML-RARa level of expression
- PML-RARA monitoring by FusionQuant® Kits splits patients into three groups:
- high risk of relapse
- intermediate risk
- low risk of relapse
- Treatment type and intensity are modulated accordingly during follow-up
Laboratory advantages- Use peripheral blood specimen instead of bone marrow
- Gold standard technology adopted by leader institutions
- Rapid test less than 3 hours turn-around time
Description & performances- 24 to 30 patient samples in duplicate
- Results in normalized copy numbers (NCN)
- Facilities and QMS compliant with ISO 13485 : 2003
- Multiplatform compatibility
- Sensitivity comparable to the BCR-ABL FusionQuant® Kit