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Detection of BCR-ABL fusion gene and its transcript variants in chronic myeloid leukaemia patients - a
Ali Javed1, Hamid Mukhtar1, Kadija Tul Kubra1
1Government College University, Lahore, Pakistan.
Objective:
To compare blood cells and plasma for BCR-ABL quantification and to find out the frequency of b2a2, b3a2 and e1a2 transcripts in chronic myeloid leukaemia patients, and to assess the correlation of BCR-ABL transcripts with haematological counts, age and gender.
Methods:
The study was conducted in April 2018 at King Edward Medical University, Lahore, Pakistan, and comprised chronic myeloid leukaemia patients from Mayo Hospital, Lahore. Ribonucleic acid was extracted using commercial extraction kits and detection of BCR-ABL messenger ribonucleic acid and its transcript variants was done by real time polymerase chain reaction. Data was analysed using SPSS 11.5.
Results:
Of the 48 patients, fusion of b3a2 was detected in 32(66.66%) and b2a2 in 10(32.10%), while fusion e1a2 was not detected at all. No co-expression of transcripts was seen in any patient. No significant correlation was found between transcript type and any of haematological parameters (p>0.05). No significant correlation of transcript type with gender and age was found (p>0.05). BCR-ABL/G6PD ratios in peripheral blood cells were higher than that of plasma (p<0.05).
Conclusions:
Plasma can be used as an alternative to blood cells for BCR-ABL quantification, and transcript types cannot be easily explained by clinical factors.
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