Background: MicroRNA (miRNA) regulates post-transcriptional gene expression through binding to complementary sites of target messenger RNA, including that from oncogenes or tumor suppressor genes. This study planned t...Background: MicroRNA (miRNA) regulates post-transcriptional gene expression through binding to complementary sites of target messenger RNA, including that from oncogenes or tumor suppressor genes. This study planned to pursue the possibility that circulating miRNA could be used for the early diagnosis of diffuse large B-cell lymphoma (DLBCL). Materials and Methods: Expression levels of miRNA obtained from serum, exosome-enriched serum, and formalin-fixed paraffin-embedded (FFPE) tissue were evaluated. Samples were collected from patients with newly diagnosed DLBCL (n = 33) or healthy volunteers (n = 22). Based on the results of previous reports, ten miRNAs were selected and expression levels were analyzed by the quantitative real-time PCR. Results: The expression levels of hsa-miR-15a-3p, hsa-miR-21-5p, hsa-miR-181a-5p, and hsa-miR-210-5p differed significantly between DLBCL patients and controls in serum and/or exosome-enriched serum, but not in FFPE tissue. In contrast, expression levels of hsa-miR-155-5p in FFPE tissue were significantly higher in DLBCL patients, as previously reported. Conclusion: We confirmed that some miRNAs were differentially expressed in serum from DLBCL patients as previously reported. Measurement of these miRNA in exosome-enriched serum did not improve the accuracy in the differential diagnosis of DLBCL. In addition, these miRNAs seem to be produced outside of lymphoma tissue.展开更多
We performed a retrospective analysis of 9 patients with acute myeloid leukemia (AML) treated with gemtuzumab ozogamicin (GO) plus cytarabine as a salvage regimen (GO reinduction) for patients who did not achieve comp...We performed a retrospective analysis of 9 patients with acute myeloid leukemia (AML) treated with gemtuzumab ozogamicin (GO) plus cytarabine as a salvage regimen (GO reinduction) for patients who did not achieve complete remission (CR) after the first cycle of induction chemotherapy or at first relapse. Cases of AML secondary to myelodysplastic syndrome or myeloproliferative disorder were included. CR was achieved in 6 of 9 patients, and 2 of 6 responders became long-term survivors. No non-responders survived longer than 6 months. Toxicity was mild, and the median duration of myelosuppression was less than 30 days. Stomatitis, nausea and sepsis occurred as non-hematological adverse events. Although our sample size was too small to permit definitive conclusions, GO reinduction should be considered for patients who relapse or do not achieve CR after the first cycle of induction chemotherapy. Some AML subtypes may respond more robustly than others, and further investigation is warranted.展开更多
文摘Background: MicroRNA (miRNA) regulates post-transcriptional gene expression through binding to complementary sites of target messenger RNA, including that from oncogenes or tumor suppressor genes. This study planned to pursue the possibility that circulating miRNA could be used for the early diagnosis of diffuse large B-cell lymphoma (DLBCL). Materials and Methods: Expression levels of miRNA obtained from serum, exosome-enriched serum, and formalin-fixed paraffin-embedded (FFPE) tissue were evaluated. Samples were collected from patients with newly diagnosed DLBCL (n = 33) or healthy volunteers (n = 22). Based on the results of previous reports, ten miRNAs were selected and expression levels were analyzed by the quantitative real-time PCR. Results: The expression levels of hsa-miR-15a-3p, hsa-miR-21-5p, hsa-miR-181a-5p, and hsa-miR-210-5p differed significantly between DLBCL patients and controls in serum and/or exosome-enriched serum, but not in FFPE tissue. In contrast, expression levels of hsa-miR-155-5p in FFPE tissue were significantly higher in DLBCL patients, as previously reported. Conclusion: We confirmed that some miRNAs were differentially expressed in serum from DLBCL patients as previously reported. Measurement of these miRNA in exosome-enriched serum did not improve the accuracy in the differential diagnosis of DLBCL. In addition, these miRNAs seem to be produced outside of lymphoma tissue.
文摘We performed a retrospective analysis of 9 patients with acute myeloid leukemia (AML) treated with gemtuzumab ozogamicin (GO) plus cytarabine as a salvage regimen (GO reinduction) for patients who did not achieve complete remission (CR) after the first cycle of induction chemotherapy or at first relapse. Cases of AML secondary to myelodysplastic syndrome or myeloproliferative disorder were included. CR was achieved in 6 of 9 patients, and 2 of 6 responders became long-term survivors. No non-responders survived longer than 6 months. Toxicity was mild, and the median duration of myelosuppression was less than 30 days. Stomatitis, nausea and sepsis occurred as non-hematological adverse events. Although our sample size was too small to permit definitive conclusions, GO reinduction should be considered for patients who relapse or do not achieve CR after the first cycle of induction chemotherapy. Some AML subtypes may respond more robustly than others, and further investigation is warranted.
