Related Experiment Video
Updated: Jun 16, 2026
Detection of Residual Donor Erythroid Progenitor Cells after Hematopoietic Stem Cell Transplantation for Patients with Hemoglobinopathies
Published on: September 6, 2017
Establishment of a rapid and highly sensitive direct-RAA-RDB detection platform: application in non-deletion
Yan Wei1, Yilian Zhao2, Chao Ye2
1Department of Laboratory Medicine, Fengjie Hospital Affiliated to Chongqing Three Gorges Medical College and People's Hospital of Fengjie, Chongqing, China.
Introduction:
Recombinase-Aided Amplification (RAA) is widely applied in genetic diagnostics owing to its simplicity and speed, making it a primary choice for Point-of-Care Testing (POCT). However, standard protocols require nucleic acid extraction. By incorporating Reverse Dot Blot (RDB) technology, multiple loci can be detected in a single tube.
Methods:
Our team developed Direct-RAA-RDB, a specific and sensitive gene detection platform that eliminates the need for nucleic acid extraction. The applicability of the platform was evaluated for the detection of non-deletion α-thalassemia, focusing on three genotypes: HBA2: c.369C>G (αWSα), HBA2: c.427T>C (αCSα), and HBA2: c.377T>C (αQSα).
Results:
The results showed that the Direct- RAA-RDB assay possesses strong specificity and high sensitivity while remaining simple to operate. The entire process is completed within 143 min, allowing for the rapid detection of non-deletion α-thalassemia in clinical settings. Because the platform does not require extraction reagents, extractors, or thermal cyclers, it can be performed in a constant-temperature water bath shaker.
Discussion:
This method significantly reduces equipment and reagent costs and offers broad potential for diverse genetic detection applications.
