The role of DDX5 RNA helicases on cancer progression and development / 中国医师杂志

DDX5 helicase (DEAD box helicases 5), also known as P68, is an important member of an ATP dependent RNA helicase.Studies have shown that DDX5 is abnormally expressed in a variety of cancers, targeting a variety of tumor related signal pathways, regulating upstream and downstream factors to affect the occurrence, invasion and migration of tumor cells. This article describes the biological role of DDX5 in malignant tumors and provides prospects for targeted treatment of tumors.

Application of May-Grunwald-Giemsa staining followed by fluorescence in situ hybridization techniques in the diagnosis of acute leukemia / 中华检验医学杂志

Objective To evaluate the clinical application of May-Grunwald-Giemsa staining followed by fluorescence in situ hybridization (MGG-FISH) technique in the differentiation diagnosis of Ph-chromosome positive acute lymphoid leukemia (Ph + ALL) from chronic myeloid leukemia in lymphoid blast crisis(CML-LBC). Methods The bone marrow smears of 4 patients with Ph+ ALL, 4 patients with CML-LBC, 1 patient with CML in myelocytic blast crisis complicated with lymphoma and 1 patient with CML in mixed blast crisis were assayed with the MGG-FISH technique in which the spectrum green labeled BCR and spectrum orange labeled ABL dual color dual fusion probes were used. Based on the morphological classification, the percentages of BCR-ABL positive cells were subsequently determined respectively in the erythroid, myeloid and lymphoid hneages for the 10 specimens. Results According to the MGG-FISH analysis, the erythroid lineage was not involved in the 4 Ph+ ALL specimens without BCR/ABL positive cells. While the BCR/ABL positive percentage of myeloid cells was 11% (1/9), 8% (1/12), 0% (0/8) and 10% (1/10) respectively and that of lymphoid cells was 97% (76/78), 98% (87/89), 98% (97/99) and 97% (75/77) respectively. On the other hand, the BCR/ABL positive percentage was 100% (8/8), 91% (10/11), 82% (9/11), 88% (7/8) in the erythroid lineage, 89% (8/9), 96% (94/98), 100% (47/47), 98% (40/41)in the myeloid lineage and 96% (78/81), 93% (52/56), 96% (68/71), 95% (58/61) in the lymphoid lineage respectively for the 4 CML-LBC specimens. The BCR/ABL positive percentages of the other 2 specimens were all above 80% and through MGG-FISH analysis we also identified the source of the malignant clones and ascertained the diagnosis of the 2 patients. Conclusions The MGG-FISH technique has proved useful in providing rapid and precise differentiation between Ph + ALL and CML-LBC. The source of the malignant clones can also be analyzed by this technique.