Evaluation of a new flow cytometry based method for detection of BCR-ABL1 fusion protein in chronic myeloid leukemia

BACKGROUND: Philadelphia chromosome, a hallmark of chronic myeloid leukemia (CML), plays a key role in disease pathogenesis. It reflects a balanced reciprocal translocation between long arms of chromosomes 9 and 22 involving BCR and ABL1 genes, respectively. An accurate and reliable detection of BCR-ABL fusion gene is necessary for the diagnosis and monitoring of CML. Previously, many technologies, most of which are laborious and time consuming, have been developed to detect BCR-ABL chimeric gene or chromosome. METHODS: A new flow cytometric immunobead assay was used for detection of BCR-ABL fusion proteins and applicability, sensitivity, reliability, efficacy and rapidity of this method was evaluated. RESULTS: From February 2009 to January 2014, a total 648 CML patients were investigated for the status of BCR-ABL1 protein. Among them, 83 patients were enrolled for comparative study of BCR-ABL1 positivity by three routinely used procedures like karyotyping, and quantitative real time PCR (RT-PCR) as well as immunobead flow cytometry assay. BCR-ABL protein analysis was found consistent, more sensitive (17% greater sensitivity) and reliable than the conventional cytogenetics, as flow cytometry showed 95% concordance rate to RT-PCR. CONCLUSION: BCR-ABL fusion protein assay using a new flow cytometric immunobead might be useful in the diagnosis and monitoring CML patients.

Multiple non-psychiatric effects of phenothiazines: a review.

The phenothiazine group of drugs has long been known as antipsychotic drugs and previously it was extensively used for the treatment of anxiety. Several pieces of evidence have shown that they interfere with a variety of cellular processes and in vitro can interact with biomolecules like DNA, proteins etc. Recent reports have also revealed some new properties like antimicrobial, antiprionic, anticancerous activities of certain members of the phenothiazine group. Appropriate clinical application of phenothiazines can be developed in the future after gaining a comprehensive knowledge about their function. Information relating to the toxic and beneficial effects of these drugs has been discussed in this review.