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The GATEWAYTM Binary Destination Vector pH7WG2 is available for easy insertion of genes for transformation into plants. The gene of interest integrates downstream of the Cauliflower Mosaic Virus Promoter CaMV 35S by recombination. The CaMV 35S promoter is however not suitable for transformation and expression of genes in monocots like rice. We isolated and cloned a ~1100 bp upstream region from two rice (Pokkali and IR64) Na/H antiporter genes into the GATEWAYTM promoter cloning vector pHGWFS7. The Pokkali promoter expressed the â-glucuronidase or GUS gene ~25-fold more efficiently than the CaMV 35S promoter in rice calli, while that of IR64 was 7-fold more. The IR64 promoter however showed efficient expression in transgenic rice leaves. The promoter from Pokkali Na/H antiporter was used to replace the CaMV 35S sequence in pH7WG2. The CaMV 35S region was cut out and the linear vector fragment blunted and T-tailed. After amplification of the promoter from Pokkali rice DNA, it was A-tailed and ligated to the modified T-vector. The resultant vector, named pH7WG3, following the nomenclature at the gateway site, www.plantgenetics.rug.ac.be/gateway, can now be used for recombination of any genes for efficient rice transformation.Key words: Recombination, Binary vector, Promoter, Transformation, RiceDOI = 10.3329/ptcb.v17i1.1120Plant Tissue Cult. & Biotech. 17(1): 47-58, 2007 (June)

Background and objective: Acute promyelocytic leukaemia (APL) is considered a distinct entity among the acute myeloid leukemias (AML). Our purpose is to see its clinical presentations and outcome with ATRA (all- trans retinoic acid). Materials and methods: It is a retrospective descriptive study of 6 patients diagnosed by cytologic criteria between November 2008 and February 2011 in two tertiary care hospitals in Dhaka, Bangladesh. All specific information were recorded in standardized data sheet and analyzed manually. Results: Mean (SD) age of patients was 28.6 (±7.84) years with equal gender distribution. Fever >101°F, weakness, easy fatigability, and bleeding manifestations were common presentations (100%). The other manifestations were bony tenderness, purpuric spots or DIC, but no lymphadenopathy and organomegaly were seen. Mean (±SD) Hb was 9.03 (±1.06) gm/dl, in 66% ESR was >50mm in 1st hr with 50% leukocytosis and 50% leucopenia but 100% thrombocytopenia.In the peripheral blood 40%-85% of the leukocytes were blast cells. Bone marrow was done in all cases which suggested AML-M3 (Acute promyelocytic leukemia) and cytogenetic diagnosis were done in 3 cases, which showed t(15;17)PML-RARA fusion protein positive. ATRA (all-trans retinoic acid) plus chemotherapy (daunorubicin ± cytarabine) achieved complete remission in 5 (80%) patients. Conclusion: Modern treatment is highly effective if administered early. Keyword: Acute promyelocytic leukaemia, PML/RARA fusion protein, All- trans retinoic acid (ATRA). DOI: http://dx.doi.org/10.3329/jom.v12i2.8420 JOM 2011; 12(2): 139-141