Nano-alumina@cellulose-coated separators with the reinforcedconcrete-like structure for high-safety lithium-ion batteries

Separators play a critical role in the safety and performance of lithium-ion batteries.However,commercial polyolefin separators are limited by their poor affinity with electrolytes and low melting points.In this work,we constructed a reinforced-concrete-like structure by homogeneously dispersing nano-Al_(2)O_(3) and cellulose on the separators to improve their stability and performance.In this reinforcedconcrete-like structure,the cellulose is a reinforcing mesh,and the nano-Al_(2)O_(3) acts as concrete to support the separator.After constructing the reinforced-concrete-like structure,the separators exhibit good stability even at 200℃(thermal shrinkage of 0.3%),enhanced tensile strain(tensile stress of 133.4 MPa and tensile strains of 62%),and better electrolyte wettability(a contact angle of 6.5°).Combining these advantages,the cells with nano-Al_(2)O_(3)@cellulose-coated separators exhibit stable cycling performance and good rate performance.Therefore,the construction of the reinforced-concretelike structure is a promising technology to promote the application of lithium-ion batteries in extreme environments.

Bone morphogenetic protein-6 suppresses TGF-β_(2)-induced epithelial-mesenchymal transition in retinal pigment epithelium

AIM:To evaluate the effect of bone morphogenetic protein-6(BMP-6)on transforming growth factor(TGF)-β_(2)-induced epithelial-mesenchymal transition(EMT)in retinal pigment epithelium(RPE).METHODS:Adult retinal pigment epithelial cell line(ARPE-19)were randomly divided into control,TGF-β_(2)(5μg/L),and BMP-6 small interfering RNA(siRNA)group.The cell morphology was observed by microscopy,and the cell migration ability were detected by Transwell chamber.The EMT-related indexes and BMP-6 protein levels were detected by Western blotting.Furthermore,a BMP-6 overexpression plasmid was constructed and RPE cells were divided into the control group,TGF-β_(2)+empty plasmid group,BMP-6 overexpression group,and TGF-β_(2)+BMP-6 overexpression group.The EMT-related indexes and extracellular regulated protein kinases(ERK)protein levels were detected.RESULTS:Compared with the control group,the migration of RPE cells in the TGF-β_(2) group was significantly enhanced.TGF-β_(2) increased the protein expression levels ofα-smooth muscle actin(α-SMA),fibronectin and vimentin but significantly decreased the protein levels of E-cadherin and BMP-6(P<0.05)in RPE.Similarly,the migration of RPE cells in the BMP-6 siRNA group was also significantly enhanced.BMP-6 siRNA increased the protein expression levels ofα-SMA,fibronectin and vimentin but significantly decreased the protein expression levels of E-cadherin(P<0.05).Overexpression of BMP-6 inhibited the migration of RPE cells induced by TGF-β_(2) and prevented TGF-β_(2) from affecting EMT-related biomarkers(P<0.05).CONCLUSION:BMP-6 prevents the EMT in RPE cells induced by TGF-β_(2),which may provide a theoretical basis for the prevention and treatment of proliferative vitreoretinopathy.

ATP6AP2,a regulator of LRP6/β-catenin protein trafficking,promotes Wnt/β-catenin signaling and bone formation in a cell type dependent manner

Wnt/β-catenin signaling is critical for various cellular processes in multiple cell types,including osteoblast(OB)differentiation and function.Exactly how Wnt/β-catenin signaling is regulated in OBs remain elusive.ATP6AP2,an accessory subunit of V-ATPase,plays important roles in multiple cell types/organs and multiple signaling pathways.However,little is known whether and how ATP6AP2 in OBs regulates Wnt/β-catenin signaling and bone formation.Here we provide evidence for ATP6AP2 in the OB-lineage cells to promote OB-mediated bone formation and bone homeostasis selectively in the trabecular bone regions.Conditionally knocking out(CKO)ATP6AP2 in the OB-lineage cells(Atp6ap2^(Ocn-Cre))reduced trabecular,but not cortical,bone formation and bone mass.Proteomic and cellular biochemical studies revealed that LRP6 and N-cadherin were reduced in ATP6AP2-KO BMSCs and OBs,but not osteocytes.Additional in vitro and in vivo studies revealed impairedβ-catenin signaling in ATP6AP2-KO BMSCs and OBs,but not osteocytes,under both basal and Wnt stimulated conditions,although LRP5 was decreased in ATP6AP2-KO osteocytes,but not BMSCs.Further cell biological studies uncovered that osteoblastic ATP6AP2 is not required for Wnt3a suppression ofβ-catenin phosphorylation,but necessary for LRP6/β-catenin and N-cadherin/β-catenin protein complex distribution at the cell membrane,thus preventing their degradation.Expression of activeβ-catenin diminished the OB differentiation deficit in ATP6AP2-KO BMSCs.Taken together,these results support the view for ATP6AP2 as a critical regulator of both LRP6 and N-cadherin protein trafficking and stability,and thus regulatingβ-catenin levels,demonstrating an un-recognized function of osteoblastic ATP6AP2 in promoting Wnt/LRP6/β-catenin signaling and trabecular bone formation.

GATA binding protein 2 mediated ankyrin repeat domain containing 26 high expression in myeloid-derived cell lines

BACKGROUND Thrombocytopenia 2,an autosomal dominant inherited disease characterized by moderate thrombocytopenia,predisposition to myeloid malignancies and normal platelet size and function,can be caused by 5’-untranslated region(UTR)point mutations in ankyrin repeat domain containing 26(ANKRD26).Runt related transcription factor 1(RUNX1)and friend leukemia integration 1(FLI1)have been identified as negative regulators of ANKRD26.However,the positive regulators of ANKRD26 are still unknown.AIM To prove the positive regulatory effect of GATA binding protein 2(GATA2)on ANKRD26 transcription.METHODS Human induced pluripotent stem cells derived from bone marrow(hiPSC-BM)INTRODUCTION Ankyrin repeat domain containing protein 26(ANKRD26)acts as a regulator of adipogenesis and is involved in the regulation of feeding behavior[1-3].The ANKRD26 gene is located on chromosome 10 and shares regions of homology with the primate-specific gene family POTE.According to the Human Protein Atlas database,the ANKRD26 protein is localized to the Golgi apparatus and vesicles,and its expression can be detected in nearly all human tissues[4].Moreover,UniProt annotation revealed that ANKRD26 is localized in the centrosome and contains coiled-coil domains formed by spectrin helices and ankyrin repeats[5,6].The most common disease related to ANKRD26 is thrombocytopenia 2(THC2),which is a rare autosomal dominant inherited disease characterized by lifelong mild-to-moderate thrombocytopenia and mild bleeding[7-9].Caused by the variants in the 5’-untranslated region(UTR)of ANKRD26,THC2 is defined by a decrease in the number of platelets in circulating blood and results in increased bleeding and decreased clotting ability[8,10].Due to the point mutations that occur in the 5’-UTR of ANKRD26,its negative transcription factors(TFs),Runt related transcription factor 1(RUNX1)and friend leukemia integration 1(FLI1),lose their repression effect[11].The persistent expression of ANKRD26 increases the activity of the mitogen activated protein kinase and extracellular signal regulated kinase 1/2 signaling pathways,which are potentially involved in the regulation of thrombopoietin-dependent signaling and further impair proplatelet formation by megakaryocytes(MKs)[11].However,the positive regulators of ANKRD26,which might be associated with THC2 pathology,are still unknown.

Analysis and monitoring of drug therapy in a patient with peptic ulcer complicated by infection:A case report

BACKGROUND The role of primary-level medical pharmacists in medical institutions in China is limited;therefore,it is necessary to explore the role of pharmacists in the process of drug treatment.CASE SUMMARY A Chinese pharmacist participated in the complete treatment of a patient with a duodenal ulcer.The rationale for drug treatment was evaluated,and adjustments were made to the antacid and anti-infective regimen,as well as the dose and frequency of administration.Body temperature,routine blood examination,and adverse drug reactions were strictly monitored.During treatment,the pharmacist recommended anti-infective therapy with ampicillin-sulbactam,which effectively controlled the infection.Additionally,the pharmacist suggested changing famotidine to lansoprazole for acid suppression and gastroprotective treatment,combined with Chinese patent medicine such as Kangfuxin Liquid.This is the first case report of a pharmacist in primary-level medical institutions adjusting drug use for patients with duodenal ulcer and pulmonary infection.CONCLUSION A pharmacist participated in the treatment process,provided individualized medication adjustment,and achieved good clinical results.

Novel insights into immune-related genes associated with type 2 diabetes mellitus-related cognitive impairment

BACKGROUND The cognitive impairment in type 2 diabetes mellitus(T2DM)is a multifaceted and advancing state that requires further exploration to fully comprehend.Neu-roinflammation is considered to be one of the main mechanisms and the immune system has played a vital role in the progression of the disease.AIM To identify and validate the immune-related genes in the hippocampus associated with T2DM-related cognitive impairment.METHODS To identify differentially expressed genes(DEGs)between T2DM and controls,we used data from the Gene Expression Omnibus database GSE125387.To identify T2DM module genes,we used Weighted Gene Co-Expression Network Analysis.All the genes were subject to Gene Set Enrichment Analysis.Protein-protein interaction network construction and machine learning were utilized to identify three hub genes.Immune cell infiltration analysis was performed.The three hub genes were validated in GSE152539 via receiver operating characteristic curve analysis.Validation experiments including reverse transcription quantitative real-time PCR,Western blotting and immunohistochemistry were conducted both in vivo and in vitro.To identify potential drugs associated with hub genes,we used the Comparative Toxicogenomics Database(CTD).RESULTS A total of 576 DEGs were identified using GSE125387.By taking the intersection of DEGs,T2DM module genes,and immune-related genes,a total of 59 genes associated with the immune system were identified.Afterward,machine learning was utilized to identify three hub genes(H2-T24,Rac3,and Tfrc).The hub genes were associated with a variety of immune cells.The three hub genes were validated in GSE152539.Validation experiments were conducted at the mRNA and protein levels both in vivo and in vitro,consistent with the bioinformatics analysis.Additionally,11 potential drugs associated with RAC3 and TFRC were identified based on the CTD.CONCLUSION Immune-related genes that differ in expression in the hippocampus are closely linked to microglia.We validated the expression of three hub genes both in vivo and in vitro,consistent with our bioinformatics results.We discovered 11 compounds associated with RAC3 and TFRC.These findings suggest that they are co-regulatory molecules of immunometabolism in diabetic cognitive impairment.

Antibacterial and angiogenic dual-functional fibrous membrane dressing for infected wound healing

Background:Skin,being a vital organ that regulates physiological responses in the human body,is prone to injury from external environmental factors.Healing full-thickness skin defects becomes especially challenging when infections and vascular injuries are involved.Traditional wound dressings with single functions,such as antibacterial or angiogenic properties,fall short in achieving rapid wound healing.To address this,there is a need to develop wound dressing materials that possess both effective antibacterial and angiogenic properties.Methods:In this study,we utilized electrospinning technology to fabricate hyaluronic acid-cellulose acetate fibrous membrane dressings,incorporating poly(ionic liquid)as an antibacterial polymer and deferoxamine as an angiogenic agent.Results:The resulting fibrous membrane dressing contained poly(ionic liquid)and deferoxamin showcased a microporous structure,drug-releasing capabilities,and excellent air permeability.It not only demonstrated highly effective antibacterial properties but also exhibited remarkable angiogenesis,thereby promoting the healing of full-thickness skin defect wounds in both in vitro and in vivo assays.Conclusion:These findings highlight the immense potential of this wound dressing material for future clinical applications.

人行悬索桥的步行参数研究

以九峰山人行悬索桥为观测点,采用视频记录与人工筛选相结合的方法获取了2236个行人样本的实测数据,进而统计得到人行悬索桥上的行人步行参数(步频、步幅和步速)的分布特性和统计值,并给出了人行悬索桥上的步频-步速、步幅-步速和步频-步幅之间的转换关系式,得到以下结论:1)在人行悬索桥上,全部行人的步行参数都服从正态分布,即步频~N(1.726,0.258)Hz、步幅~N(0.596,0.094)m、步速~N(1.013,0.260)m/s,它们的合理性也在某工程实例的应用中得以验证;2)人行悬索桥上的行人步行参数的均值(标准差)要小于(大于)其他行走环境所统计得到的行人步行参数的均值(标准差);3)中国人的步频和步幅的均值(标准差)都小于(大于)西方人的步频和步幅的均值(标准差).因此,在设计我国的人行悬索桥时,不能直接采用其他人种和行走环境的行人步行参数的统计值,而应采用适合于人行悬索桥的步行参数.

Engineering hollow core-shell hetero-structure box to induce interfacial charge modulation for promoting bidirectional sulfur conversion in lithium-sulfur batteries

Severe polysulfide shuttling and sluggish sulfur redox kinetics significantly decrease sulfur utilization and cycling stability in lithium-sulfur batteries(LSBs).Herein,we develop a hollow CoO/CoP-Box core-shell heterostructure as a model and multifunctional catalyst modified on separators to induce interfacial charge modulation and expose more active sites for promoting the adsorption and catalytic conversion ability of sulfur species.Theoretical and experimental findings verify that the in-situ formed core-shell hetero-interface induces the formation of P-Co-O binding and charge redistribution to activate surface O active sites for binding lithium polysulfides(LiPSs)via strong Li-O bonding,thus strongly adsorbing with Li PSs.Meanwhile,the strong Li-O bonding weakens the competing Li-S bonding in LiPSs or Li2S adsorbed on CoO/CoP-Box surface,plus the hollow heterostructure provides abundant active sites and fast electron/Li+transfer,so reducing Li2S nucleation/dissolution activation energy.As expected,LSBs with CoO/CoP-Box modified separator and traditional sulfur/carbon black cathode display a large initial capacity of 1240 mA h g^(-1)and a long cycling stability with 300 cycles(~60.1%capacity retention)at 0.5C.Impressively,the thick sulfur cathode(sulfur loading:5.2 mg cm^(-2))displays a high initial areal capacity of 6.9 mA h cm^(-2).This work verifies a deep mechanism understanding and an effective strategy to induce interfacial charge modulation and enhance active sites for designing efficient dual-directional Li-S catalysts via engineering hollow core-shell hetero-structure.

虾青素在禽畜养殖中的功效及应用研究进展

虾青素是一种酮式类胡萝卜素,因特殊的化学结构而具有极强的抗氧化性。目前,虾青素作为一种高效、安全的饲料添加剂,具有抗氧化、增强免疫力、缓解炎症等生物学功能,在水产、禽畜养殖中具有广阔的应用前景。本文综述了虾青素的结构特性、来源和在禽畜养殖中的应用效果,以期为虾青素在禽畜养殖中更广泛地应用提供理论参考。

Modeling the blast load induced by a close-in explosion considering cylindrical charge parameters

Structural damage is significantly influenced by the various parameters of a close-in explosion.To establish a close-in blast loading model for cylindrical charges according to these parameters,a series of field experiments and a systematic numerical analysis were conducted.A high-fidelity finite element model developed using AUTODYN was first validated using blast data collected from field tests conducted in this and previous studies.A quantitative analysis was then performed to determine the influence of the charge shape,aspect ratio(length to diameter),orientation,and detonation configuration on the characteristics and distributions of the blast loading(incident peak overpressure and impulse)according to scaled distance.The results revealed that the secondary peak overpressure generated by a cylindrical charge was mainly distributed along the axial direction and was smaller than the overpressure generated by an equivalent spherical charge.The effects of charge shape on the blast loading at 45°and 67.5°in the axial plane could be neglected at scaled distances greater than 2 m/kg^(1/3);the effect of aspect ratios greater than 2 on the peak overpressure in the 90°(radial)direction could be neglected at all scaled distances;and double-end detonation increased the radial blast loading by up to 60%compared to singleend detonation.Finally,an empirical cylindrical charge blast loading model was developed considering the influences of charge aspect ratio,orientation,and detonation configuration.The results obtained in this study can serve as a reference for the design of blast tests using cylindrical charges and aid engineers in the design of blast-resistant structures.

From metabolic dysfunction-associated fatty liver disease to metabolic dysfunction-associated steatotic liver disease:Controversy and consensus

The newly released nomenclature of metabolic dysfunction-associated steatotic liver disease(MASLD)in the 2023 European Association for the Study of the Liver Congress has raised great clinical concerns.This marks the second instance of significant renaming of non-alcoholic fatty liver disease since the introduction of metabolic dysfunction-associated fatty liver disease(MAFLD)in 2020.The nomenclature and definitions of MASLD and MAFLD exhibit significant disparities as well as substantial consensus.The disparities regarding the framework of nomenclature,the definitions,the clinical management,and the impact on the clinical outcomes between MASLD and MAFLD were comprehensively compared in this editorial.Additionally,the consensus reached by the MASLD and MAFLD definitions also emphasizes positive diagnosis rather than negative diagnosis within the framework of establishing a diagnostic approach.Furthermore,they acknowledged the pivotal role of metabolic dysfunction in the pathogenesis of MAFLD or MASLD and the positive role of increasing the awareness of the disease in public.Fortunately,the non-invasive tests remains effective in the MASLD and MAFLD era.Elucidating these disparities would contribute to a more comprehensive comprehension of the nature of steatotic liver disease and enhance clinical practice.Thus,more efforts are required to reach more consensus about these important topics.

湖南省细菌耐药监测网2012—2021年呼吸道分离菌耐药性监测

目的了解2012—2021年湖南省细菌耐药监测网呼吸道分离菌的分布和耐药性变迁。方法细菌鉴定和药敏试验统一按全国细菌耐药监测网(CARSS)细菌耐药监测技术方案执行,剔除重复菌株。按照美国临床实验室标准化协会(CLSI)2022年标准判断细菌对抗菌药物的敏感性,应用WHONET 5.6软件进行统计描述。结果2012—2021年湖南省细菌耐药监测网呼吸道标本共分离976984株细菌,其中革兰阳性菌185642株(19.0%),革兰阴性菌791342株(81.0%)。分离自成人患者呼吸道标本排名前五位的细菌是肺炎克雷伯菌(25.2%)、铜绿假单胞菌(17.0%)、鲍曼不动杆菌(14.6%)、大肠埃希菌(6.7%)和金黄色葡萄球菌(5.8%)。分离自儿童患者呼吸道标本排名前五位的细菌是金黄色葡萄球菌(17.7%)、肺炎链球菌(15.6%)、大肠埃希菌(13.5%)、肺炎克雷伯菌(13.1%)和流感嗜血杆菌(10.8%)。肺炎克雷伯菌、大肠埃希菌和阴沟肠杆菌对替加环素、头孢哌酮/舒巴坦、哌拉西林/他唑巴坦、碳青霉烯类、阿米卡星耐药率较低(<15%)。肺炎克雷伯菌对亚胺培南、美罗培南的耐药率分别从2012—2013年的3.5%、4.2%逐渐上升至2020—2021年的9.5%、11.5%,对头孢哌酮/舒巴坦、哌拉西林/他唑巴坦、阿米卡星、妥布霉素、环丙沙星和左氧氟沙星的耐药率呈上升趋势。大肠埃希菌和阴沟肠杆菌对氨曲南、氨基糖苷类和氟喹诺酮类的耐药率呈下降趋势。铜绿假单胞菌对多黏菌素耐药率较低(<6%),鲍曼不动杆菌对替加环素和多黏菌素耐药率较低(<6%)。铜绿假单胞菌对β-内酰胺类、氨基糖苷类和氟喹诺酮类耐药率下降。鲍曼不动杆菌对头孢哌酮/舒巴坦的耐药率从18.0%上升至43.7%,对哌拉西林/他唑巴坦、亚胺培南、氟喹诺酮类和米诺环素的耐药率呈上升趋势。未发现对万古霉素、替考拉宁和利奈唑胺耐药的金黄色葡萄球菌。成人和儿童患者耐甲氧西林金黄色葡萄球菌(MRSA)检出率分别为37.8%(14208/37594)、22.7%(10874/47882)。结论湖南省2012—2021年呼吸道分离细菌以革兰阴性菌为主,成人和儿童患者分离的优势细菌并不相同。大肠埃希菌、阴沟肠杆菌和铜绿假单胞菌对部分抗菌药物的耐药率不断下降。肺炎克雷伯菌对碳青霉烯类耐药率逐渐上升。应持续高效做好细菌耐药监测,为临床使用抗菌药物提供数据支持。

湖南省细菌耐药监测网2012—2021年克雷伯菌属细菌的耐药性变迁

目的了解湖南省克雷伯菌属细菌和儿童患者分离克雷伯菌属细菌的耐药性变化,为该地区医疗机构合理使用抗菌药物提供依据。方法分析湖南省细菌耐药监测网2012—2021年克雷伯菌属细菌的相关数据,根据美国临床实验室标准化协会(CLSI)M100第32版标准对结果进行判断,应用WHONET 5.6软件对结果进行统计分析。结果2012—2021年湖南省细菌耐药监测网共分离361539株克雷伯菌属细菌,其中肺炎克雷伯菌占86.7%,菌株主要来源于呼吸道标本(66.5%)。2015—2021年克雷伯菌属细菌对亚胺培南和美罗培南的耐药率在10%左右;对替加环素的耐药率下降,2012—2013年的耐药率为7.1%,2018—2021年均<4%;对头孢哌酮/舒巴坦的耐药率2012—2021年上升明显,2020—2021年为13.3%。儿童患者分离的克雷伯菌属细菌2015—2021年对碳青霉烯类药物的耐药率为3.5%~8.6%,2012—2021年对替加环素的耐药率均≤3.8%。2020—2021年新生儿、儿童、成人和老年人患者耐碳青霉烯类克雷伯菌属细菌的检出率分别为4.7%、3.9%、9.5%、10.2%。结论2012—2021年克雷伯菌属细菌对碳青霉烯类药物耐药率较低,但出现了对替加环素耐药的菌株,需引起重视,应合理使用抗菌药物,预防和控制医院感染发生。

甘薯U6启动子克隆及其转录活性分析

在CRISPR/Cas9基因编辑系统中,U6启动子可以通过驱动sgRNA的表达来编辑目的基因,因而其转录活性会影响基因编辑效率。尽管人们已经在拟南芥、玉米、大豆、棉花等植物中开展了U6启动子的克隆与应用研究,然而目前在甘薯中U6启动子的相关研究还未见报道。本研究利用拟南芥的AtU6 SnRNA的保守序列在三浅裂野牵牛(Ipomoea trifida)基因组数据库中搜索候选U6 RNA,然后在其上游搜索到2个不同的候选U6启动子,长度分别为526 bp(IbU6p-1)和532 bp(IbU6p-2);序列比对分析结果显示,甘薯的U6启动子具有上游序列元件(USE)以及TATA-box,其序列也与拟南芥高度相似。然后,利用获得的U6启动子核酸序列构建了能够驱动萤火虫荧光素酶基因(LUC)表达的重组框U6::LUC。最后,将含有上述重组载体的根癌农杆菌瞬时转化到本氏烟草叶片和甘薯愈伤组织中,并通过荧光成像技术分析荧光素酶活性。结果发现,在烟草及甘薯愈伤组织中2个甘薯U6启动子均能驱动LUC基因表达,具有转录活性。同时,IbU6p-2的转录活性无论是在烟草叶片中还是在甘薯愈伤组织中都显著高于拟南芥U6启动子。本研究结果为进一步发展甘薯基因编辑技术提供了参考。

船舶远程驾驶人机主从博弈控制方法研究

针对船舶远程驾驶场景下的人机目标非一致性问题,本文设计了系统人主机辅的运行模式,提出一种主从博弈框架下的共享控制方法,将船舶协同避碰转向任务中的人机交互作用描述为完全信息条件下的非合作博弈关系,通过构造驾驶员和共驾控制器的状态空间推导主从博弈的Stackelberg微分对策,使用Fan-GFlicksberg不动点定理证明纳什均衡解的存在性与唯一性。根据驾驶风格和操纵技能预分配驾驶权重,基于模型预测控制方法设计轨迹跟踪器,采取反馈校正方式在有限时域内滚动优化,综合考虑船舶安全航行边界、碰撞风险和人机冲突程度在线进行调节。选取船舶横向偏移误差和驾驶员操作负荷等评价指标,在内河操纵环境下验证了方法的有效性。仿真结果表明:本文所提出的主从博弈控制方法能够为具备不同驾驶风格和操纵技能的作业人员提供个性化辅助,当驾驶员和共驾控制器发生意图冲突时,根据航行风险对预分配权重进行调节,在确保航行安全的前提下使船舶尽可能满足驾驶员的操纵意图。

育阴灵加减方对D-半乳糖所致POI模型大鼠Hippo信号通路的影响

目的:研究育阴灵加减方对早发性卵巢功能不全(POI)模型大鼠的影响及其可能作用机制。方法:35%D-半乳糖造模成功的POI模型子代雌性大鼠40只随机分为模型组,育阴灵加减方高(0.562 g/kg)、中(0.281 g/kg)、低(0.141 g/kg)剂量组和西药组,西药组给予戊酸雌二醇溶液0.120 mg/kg,第4天加灌醋酸甲轻孕酮片溶液0.960 mg/kg,随后两药停用1 d,为1个疗程,灌胃4个疗程。未造模的8只子代雌性大鼠作为空白组。观察大鼠体质量、卵巢及子宫系数、卵巢组织的病理变化、血清抗缪勒管激素(AMH)、抑制素B(INHB)、血管内皮生长因子(VEGF)水平,蛋白免疫印迹法及荧光定量PCR法测定卵巢组织中Hippo信号通路相关效应因子表达情况。结果:与模型组相比,育阴灵加减方高、中剂量组可以升高大鼠体质量、卵巢系数、子宫系数(P<0.05),可改善卵巢组织结构并升高大鼠血清AMH、INHB、VEGF水平(P<0.05),两组Hippo信号通路相关效应因子Mst1、Lats2、YAP1、p-YAP、Smad7的表达量明显降低(P<0.05)。结论:育阴灵加减方可能通过调控Hippo信号通路的表达改善POI模型大鼠的卵巢功能。

山竹子素通过调控PTEN在宫颈癌中发挥抑癌作用

目的:探讨山竹子素是否通过调控PTEN在宫颈癌中发挥抑癌作用。方法:Immunoblotting检测PTEN表达水平。利用CRISPR/Cas9技术建立PTEN敲除的宫颈癌细胞模型。CCK-8和EdU染色方法检测细胞生长和增殖。流式细胞术检测细胞凋亡水平。划痕实验检测细胞迁移。Transwell实验检测细胞侵袭。利用PTEN敲除宫颈癌细胞来构建荷瘤小鼠模型,检测山竹子素对肿瘤形成和生长的影响。免疫组化检测移植瘤组织中PTEN表达和Ki-67增殖水平。结果:山竹子素可以显著上调宫颈癌细胞中PTEN的蛋白表达水平(P<0.01)。转染Cas9-PTEN质粒至宫颈癌细胞中可以显著下调PTEN表达(P<0.01)。在野生型宫颈癌细胞中,山竹子素可以显著抑制细胞的增殖、迁移和侵袭,同时诱导细胞凋亡(P<0.01)。在PTEN敲除的宫颈癌细胞中,山竹子素则对宫颈癌细胞增殖、迁移、侵袭和凋亡,无明显影响(P>0.05)。PTEN敲除可阻断山竹子素对裸鼠体内异种移植瘤生长的抑制作用。结论:山竹子素通过调控PTEN在宫颈癌中发挥抑癌作用。

通用信道编译码算法物理性能快速仿真系统

为实现信道编译码硬件算法物理性能的快速、准确验证,提出一种软硬件协同的通用化信道编译码算法物理性能快速仿真与性能评估系统。PC上位机软件主要实现模拟信源/噪声数据生成、仿真数据后分析、数据/控制指令传输以及与FPGA下位机交互等功能;FPGA下位机通过设计数据调度与系统控制、信道编译码算法架构、加噪信道以及数据统计等单元,构建通用编译码算法验证系统硬件系统架构,支持不同信道编译码算法物理性能的高效、准确验证。以系统当前支持的BCH码、LDPC码、删余卷积码、RS码及其串行级联码的性能仿真为例开展性能测试,性能恶化最大值低于0.4 dB,在10-7误码率统计量级下,仿真时间低于12 s,验证仿真评估系统的准确性、可靠性与有效性。系统采用的通用级联架构还可支持其他信道编译码算法的快速移植与部署,可为信道编译码算法物理性能快速验证提供一种有效的解决方案。

宫颈癌患者术后性健康教育的最佳证据总结

目的 检索、总结宫颈癌患者术后性健康教育有关的最佳证据,为更好地对临床宫颈癌患者提供性健康和功能障碍方面的宣教奠定基础。方法 以“6S”金字塔为模型,使用计算机检索BMJ Best Practice、Up To Date、国际指南协作网、美国国立指南库、英国国家临床医学研究所指南库、苏格兰学院间指南网等关于宫颈癌患者性健康教育相关的指南(检索时限为建库至2022年9月20日),并检索了性专业网站及肿瘤相关网站。根据纳入标准遴选文献,由2名研究者背对背对纳入文献进行质量评价和证据提取。结果 本研究最终共纳入5篇指南,形成的证据包括5个方面(分别为评估问询、相关症状、性心理、阴道扩张和用药指导)共20条证据。结论 宫颈癌患者术后性健康教育的最佳证据总结,有助于指导医护人员以更科学的方式对宫颈癌患者进行健康宣教,从而改善患者的生活质量和心理幸福感。