Prevalence of transthyretin cardiac amyloidosis in elderly patients diagnosed with heart failure

ObjectiveThere is increased interest in studying ATTR-CA, a pathology that primarily affects patients of geriatric age and is frequently underdiagnosed. We aim to establish the prevalence of ATTR-CA in a cohort of patients with a history of HFpEF and to describe its characteristics.MethodsWe conducted a prospective observational study. Patients ≥75 years, clinical history of HFpEF, atrial dilation ≥34 ml/m² and left ventricular wall thickening >13 mm, were included. Demographic and analytical parameters were collected, and a comprehensive geriatric assessment was performed, along with a transthoracic echocardiogram and cardiac scintigraphy. Finally, telephone follow-up was carried out at 6 and 12 months.Results50 patients were recruited, mean age 86 ± 6 years, 54% women. Age and functional class (I–II vs. III–IV) were factors associated with presenting with ATTR-CA. Patients with positive scintigraphy had a median time to admission of 5.2 months (confidence interval [CI] 95% 0–10.9), while in those with negative scintigraphy, it was 12.2 months (95% CI 11.7–12.8); log-rank: p = 0.064. Patients with positive scintigraphy had a median time to the combined endpoint (death and readmission) of 1.9 months (95% CI 0–6.1), and patients with negative scintigraphy of 11.9 months (95% CI 11.7–12); log-rank: p = 0.027.ConclusionsATTR-CA appears to be a prevalent etiology in elderly patients within the spectrum of HFpEF. Patients with a diagnosis of ATTR-CA had a shorter time to admission for HF and the combined event of death and admission than patients with a negative result on scintigraphy.     

山西糜子核心种质分子身份证构建

为快速鉴定糜子(Panicum miliaceum)资源, 建立分子标记检测平台, 以272份山西糜子核心种质为研究材料, 利用85对简单重复序列(SSR)引物, 应用ID Analysis 4.0软件, 构建DNA分子身份证。结果表明, 对85对SSR引物进行筛选, 发现20对引物组合(RYW67、RYW53、RYW37、RYW65、RYW62、RYW77、RYW5、RYW49、RYW84、RYW19、RYW11、RYW40、RYW54、RYW28、RYW31、RYW7、RYW16、RYW8、RYW9和RYW18)可区分272份材料。共检测到等位变异(Na) 60个, 平均每个位点检出3个; Shannon多样性指数(I)为0.957 8 (RYW16)-1.096 7 (RYW5), 平均值为1.055 2; 多态性信息含量(PIC)为0.604 4 (RYW77)-0.753 0 (RYW37), 平均值为0.692 1。利用20对引物构建山西糜子核心种质的字符串、条形码和二维码DNA分子身份证, 可为种质身份标识和溯源提供实践路径。     

Evidence for a credit-card-swipe mechanism in the human PC floppase ABCB4

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An Ecosystem Health Index for a large and variable river basin: Methodology,challenges and continuous improvement in Queensland’s Fitzroy Basin

Report cards are an increasingly popular method for summarising and communicating relative environmental performance and ecosystem health, including in aquatic environments. They are usually underpinned by an Ecosystem Health Index (EHI) that combines various individual indicators to produce an overall ecosystem health “score”. As a result of public water quality concerns, an integrated means of monitoring and reporting on aquatic ecosystem health was needed for the Fitzroy Basin in central Queensland, Australia. The Fitzroy Partnership for River Health was formed to address this need, and developed an EHI and report card for the Basin using existing monitoring data collected from various third parties including regulated companies operations and government. At 142,000 square kilometres, the Fitzroy Basin is the largest catchment draining to the World Heritage Listed Great Barrier Reef. The Fitzroy Basin provides an example of how to deliver an effective aquatic ecosystem health reporting system in a large and complex river basin. We describe the methodology used to develop an adaptive EHI for the Fitzroy Basin that addresses variability, complexity and scale issues associated with reporting across large areas. As well, we report how to manage the design and reporting stages given limitations in data collection and scientific understanding.     

基于PC声卡的生物医学电信号采集方法

把生物医学电信号以线性调幅的方法调制在音频载波信号之上,用PC声卡采集该已调波信号,用软件实现调幅波的解调,经数字低通滤波器的滤波,恢复出生物医学电信号,达到采集和显示生物医学电信号的的目的。实践证明,该方法具有成本低、多通道工作实时性好的特点,具有实用价值。     

A challenge for miRNA: multiple isomiRs in miRNAomics

Accumulating evidence suggests that a single microRNA (miRNA) locus can generate a series of sequences during miRNA maturation process. These multiple sequences, called miRNA variants, or isomiRs, have different lengths and different 5′ and 3′ ends. Some of these isomiRs are detected as varied nucleotides and 3′ additional non-template nucleotides. As physiological miRNA isoforms, they have drawn attention for possible regulatory biological roles. The present work mainly reviews miRNA/isomiR biogenesis, isomiR expression patterns, and functional and evolutionary implications, especially between isomiRs from homologous and clustered miRNA loci. The phenomenon of multiple isomiRs and their biological roles indicates that analysis performed at the miRNA and isomiR levels should be included in miRNA studies. This may enrich and complicate miRNA biogenesis and coding–non-coding RNA regulatory networks.     

利用SRAP标记分析海南旱稻地方品种的遗传多样性及其分子身份证的构建

利用SRAP标记对来自海南省的28份旱稻种质进行了亲缘关系分析。从255对引物组合中筛选出46对扩增条带清晰、多态性高的引物组合,并选用其中的18对引物组合对28份材料进行SRAP扩增,共扩增出180个条带,其中多态性条带160条,多态性比率为87.75%,平均每对引物组合产生10个条带和8.9个多态性条带。并且,运用UPMGA方法进行的聚类分析结果表明,供试旱稻种质的遗传相似系数范围为0.687 0-0.921 2,在遗传相似系数0.687 0处分为两大类群,第I类群全部为海南山栏稻种质,第Ⅱ类群为海南地方旱稻坡压和本研究组自育旱稻品种。对海南旱稻地方品种的划分表明,山栏稻种质间亲缘关系较近,海南地方旱稻坡压可能与籼型水稻种质具有一定的遗传相似性。此外,还构建了28份海南省旱稻种质的SRAP标记分子身份证,可为山栏稻种质的遗传亲缘关系,种质鉴定及新品种选育等方面提供依据。     

温馨提示卡在神经内科住院患者中的应用效果评估

目的:探讨温馨提示卡在神经内患者中的应用效果评估.方法:将200例我院神经内科住院患者随机分为两组,普通组患者入院进行宣教,护理人员对100例患者的用药、饮食、锻炼等进行口头教育;对照组100例患者采用入院发放温馨提示卡及常规宣教结合的方法.对两组患者的遵医效果进行比对.结果:普通组100例患者的遵医行为差于对照组患者(P＜0.05),对照组患者护理满意度高于普通组患者(P＜0.05).结论:应用温馨提示卡可以有效降低神经内科住院患者不良事件发生率,督促患者更好的遵医,提高患者护理满意度.