A wearable real-time telemonitoring electrocardiogram device compared with traditional Holter monitoring

Arrhythmias are very common in the healthy populations as well as patients with cardiovascular diseases.Among them,atrial fibrillation(AF)and malignant ventricular arrhythmias are usually associated with some clinical events.Early diagnosis of arrhythmias,particularly AF and ventricular arrhythmias,is very important for the treatment and prognosis of patients.Holter is a gold standard commonly recommended for noninvasive detection of paroxysmal arrhythmia.However,it has some shortcomings such as fixed detection timings,delayed report and inability of remote real-time detection.To deal with such problems,we designed and applied a new wearable 72-hour triple-lead H3-electrocardiogram(ECG)device with a remote cloud-based ECG platform and an expertsupporting system.In this study,31 patients were recruited and 24-hour synchronous ECG data by H3-ECG and Holter were recorded.In the H3-ECG group,ECG signals were transmitted using remote real-time modes,and confirmed reports were made by doctors in the remote expert-supporting system,while the traditional modes and detection systems were used in the Holter group.The results showed no significant differences between the two groups in 24-hour total heart rate(HR),averaged HR,maximum HR,minimum HR,premature atrial complexes(PACs)and premature ventricular complexes(PVCs)(P>0.05).The sensitivity and specificity of capture and remote automatic cardiac events detection of PACs,PVCs,and AF by H3-ECG were 93%and 99%,98%and 99%,94%and 98%,respectively.Therefore,the long-term limb triple-lead H3-ECG device can be utilized for domiciliary ECG self-monitoring and remote management of patients with common arrhythmia under medical supervision.

A single-nucleus transcriptomic atlas of primate liver aging uncovers the pro-senescence role of SREBP2 in hepatocytes

Aging increases the risk ofliver diseases and systemic susceptibility to aging-related diseases.However,cell type-specific changes and the underlying mechanism of liver aging in higher vertebrates remain incompletely characterized.Here,we constructed the first single-nucleus transcriptomic landscape of primate liver aging,in which we resolved cell type-specific gene expression fluctuation in hepatocytes across three liver zonations and detected aberrant cell-cell interactions between hepatocytes and niche cells.Upon in-depth dissection of this rich dataset,we identifed impaired lipid metabolism and upregulation of chronic inflammation-related genes prominently associated with declined liver functions during aging.In particular,hyperactivated sterol regulatory element-binding protein(SREBP)signaling was a hallmark of the aged liver,and consequently,forced activation of SREBP2 in human primary hepatocytes recapitulated in vivo aging phenotypes,manifesting as impaired detoxification and accelerated cellular senescence.This study expands our knowledge of primate liver aging and informs the development of diagnostics and therapeutic interventions for liver aging and associated diseases.

Single-cell profiling reveals a potent role of quercetin in promoting hair regeneration

Hair loss affects millions of people at some time in their life,and safe and efficient treatments for hair loss are a significant unmet medical need.We report that topical delivery of quercetin(Que)stimulates resting hair follicles to grow with rapid follicular keratinocyte proliferation and replenishes perifollicular microvasculature in mice.We construct dynamic single-cell transcriptome landscape over the course of hair regrowth and find that Que treatment stimulates the differentiation trajectory in the hair follicles and induces an angiogenic signature in dermal endothelial cells by activating HIF-1αin endothelial cells.Skin administration of a HIF-1αagonist partially recapitulates the pro-angiogenesis and hair-growing effects of Que.Together,these findings provide a molecular understanding for the efficacy of Que in hair regrowth,which underscores the translational potential of targeting the hair follicle niche as a strategy for regenerative medicine,and suggest a route of pharmacological intervention that may promote hair regrowth.

Encapsulated carbon nanotube array as a thermal interface material compatible with standard electronics packaging

Vertically aligned carbon nanotubes arrays(VACNTs)are a promising candidate for the thermal interface material(TIM)of next-generation electronic devices due to their attractive thermal and mechanical properties.However,the environment required for synthesizing VACNTs is harsh and severely incompatible with standard device packaging processes.VACNTs’extremely low in-plane thermal conductivity also limits its performance for cooling hot spots.Here,using a transfer-and-encapsulate strategy,a two-step soldering method is developed to cap both ends of the VACNTs with copper microfoils,forming a standalone Cu-VACNTs-Cu sandwich TIM and avoiding the need to directly grow VACNTs on chip die.This new TIM is fully compatible with standard packaging,with excellent flexibility and high thermal conductivities in both in-plane and through-plane directions.The mechanical compliance behavior and mechanism,which are critical for TIM applications,are investigated in depth using in situ nanoindentation.The thermal performance is further verified in an actual light emitting diode(LED)cooling experiment,demonstrating low thermal resistance,good reliability,and achieving a 17℃ temperature reduction compared with state-of-the-art commercial TIMs.This study provides a viable solution to VACNTs’longstanding problem in device integration and free-end contact resistance,bringing it much closer to application and solving the critical thermal bottleneck in next-generation electronics.

MacroH2A1.1 cooperates with EZH2 to promote adipogenesis by regulating Wnt signaling

白 adipocytes 玩在许多生理的过程的重要角色包括精力存储，内分泌的发信号，并且煽动性的回答。理解 adipocyte 形成(adipogenesis ) 的分子的机制对肥胖和它的相关疾病提供卓见进治疗学的途径。许多 transcriptional 因素和 epigenetic 酶被知道调整 adipogenesis；然而， histone 变体是否在这个过程起一个作用，是未知的。这里，我们发现了那 macroH2A1.1 (mH2A1.1 ) ， histone H2A 的变体，在在 3T3-L1 房间并且在肥胖的鼠标的白脂肪质的织物的 adipocyte 区别期间是 upregulated。mH2A1.1 的脱离激活表明小径的 Wnt/-catenin，当 mH2A1.1 的 overexpression 出现在效果对面时。我们进一步发现 mH2A1.1 调整了由与 EZH2 合作表明小径的 Wnt/-catenin， histone H3K27 methyltransferase，因此在 Wnt 基因的倡导者上导致了 H3K27me2 和 H3K27me3 的累积。在宏域的变化， mH2A1.1 G224E , 和 mH2A1.1 G314E , 不仅损害了 adipogenesis，而且在 Wnt 基因的倡导者上损害了 mH2A1.1 的有约束力的能力到 EZH2 和 H3K27me2 和 H3K27me3 的丰富。一起，我们的学习在 adipogenesis 和肥胖揭示 mH2A1.1 的一个新奇规章的角色，它在白胖开发提供新卓见。