BCOR gene is a transcription regulatory factor that plays an essential role in normal hematopoiesis. The wider introduction of next-generation sequencing technology has led to reports in recent years of mutations in the BCOR gene in acute myeloid leukemia (AML), but the related clinical characteristics and prognosis are not sufficiently understood. We investigated the clinical characteristics and prognosis of 377 de novo AML cases with BCOR or BCORL1 mutation. BCOR or BCORL1 gene mutations were found in 28 cases (7.4%). Among cases aged 65 years or below that were also FLT3-ITD-negative and in the intermediate cytogenetic prognosis group, BCOR or BCORL1 gene mutations were observed in 11% of cases (12 of 111 cases), and this group had significantly lower 5-year overall survival (OS) (13.6% vs. 55.0%, P = 0.0021) and relapse-free survival (RFS) (14.3% vs. 44.5%, P = 0.0168) compared to cases without BCOR or BCORL1 gene mutations. Multivariate analysis demonstrated that BCOR mutations were an independent unfavorable prognostic factor (P = 0.0038, P = 0.0463) for both OS and RFS. In cases of AML that are FLT3-ITD-negative, aged 65 years or below, and in the intermediate cytogenetic prognosis group, which are considered to have relatively favorable prognosis, BCOR gene mutations appear to be an important prognostic factor.

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Recirculating aquaculture systems (RAS) are important for water quality management in aquaculture facilities, and can help resume water consumption. However, information about the community structure of the micro-ecosystem existing in biofilters, especially the participation of the known nitrifying groups (i.e., AOA, AOB, NOB, and comammox Nitrospira), remains to be fully clarified. In this research, we compared the community structures in three RAS systems operated at different temperatures in a marine aquarium, through both amoA-targeted qPCR assay and 16S rRNA-targeted next-generation sequencing. As result, AOA was the primary nitrifier in the biofilters and was typically abundant and diverse in high-temperature samples (ca. 25 °C). NOB’s relative abundance patterns were numerically similar to that of AOA, suggesting a cooperation relationship between AOA and NOB in the marine RAS system. AOB was at a comparable level with AOA in medium-temperature samples (ca. 19 °C), while their abundance sharply decreased in high-temperature samples. The number of observed OTUs of AOA in high-temperature samples was 1.9 and 1.5 times as much as that detected in low (ca. 10 °C) and medium temperature samples respectively, suggesting a much more diverse and predominant occurrence of AOA at high temperatures. Comammox Nitrospira was only detected at a low level in the biofilter samples, suggesting a negligible contribution to the nitrification process in such ammonia-limited, saline biofilms. Although comammox Nitrospira cannot be detected by 16S rRNA-based analysis, the high diversity and abundance of NOB that were detected in high-temperature samples indicated the prospective possibility of the occurrence of complete ammonia oxidation at high temperatures.