枸杞SWEET基因家族鉴定及其与可溶性糖含量关系

【目的】糖外排转运蛋白(sugars will eventually be exported transporters,SWEETs)在植物生长发育过程中发挥重要作用,解析SWEETs基因在枸杞果实发育过程中对糖积累作用,为进一步揭示SWEETs基因在枸杞果实发育过程中的作用提供参考。【方法】用生物信息学方法对枸杞SWEET基因(LbaSWEETs)进行全基因组鉴定,并用已发表的转录数据分析LbaSWEETs在果实发育时期的基因表达情况。【结果】枸杞SWEET基因家族共有37个成员,随机分布于10条染色体上,分别编码152~621个氨基酸,蛋白质分子质量为16.87~69.97 kD,等电点为4.96~9.86。亚细胞定位预测位于叶绿体或质膜,大多数含有7个跨膜螺旋。系统进化分析发现,37个LbaSWEETs蛋白可分为4个亚群,每个亚群的基因结构和保守基序组成相似。启动子元件分析表明:Lba-SWEETs基因启动子富含大量激素响应、逆境胁迫和生长发育响应元件。转录组数据和qRT-PCR分析表明:LbaSWEET9和LbaSWEET29基因表达量随果实成熟呈现显著增加。相关性分析结果表明,LbaSWEET9和LbaSWEET29基因表达量与果糖含量呈显著正相关。【结论】LbaSWEET9和LbaSWEET29基因是果糖积累的关键基因。

中药辨证治疗Sweet综合征1例报道并文献复习

Sweet综合征又名急性发热性中性粒细胞增多性皮病,是一种与许多不同的基础疾病相关的皮肤病。其主要临床表现为发热、疼痛性红色斑块或结节,外周血白细胞和中性粒细胞增多,组织病理学特点为真皮中大量中性粒细胞浸润[1]。本病发病机制尚不明确,慢性感染和恶性肿瘤是最常见的发病诱因,临床表现差异很大,容易误诊,组织病理是诊断Sweet综合征的可靠依据。现报道1例以中药方剂内服为主治疗有干燥综合征基础合并Sweet综合征患者的过程并进行文献复习。

联合化疗治疗原发性胃弥漫大B细胞淋巴瘤合并Sweet综合征1例并文献复习

非霍奇金淋巴瘤(non-Hodgkin lymphoma,NHL)是临床常见的肿瘤类型,临床表现多样,确诊依赖组织活检,根据病灶起源可以分为结内和结外淋巴瘤。原发性胃肠淋巴瘤是结外淋巴瘤的常见部位,可以累及胃、小肠、结肠等,其中约50%~60%发生在胃部,病理类型以黏膜相关淋巴组织淋巴瘤和弥漫大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)为主[1~3]。

植物SWEET基因及其糖转运功能研究进展

SWEET(sugars will eventually be exported transporter)是一类介导蔗糖或己糖通过顺浓度梯度被动扩散跨细胞膜转运的新型糖转运蛋白。植物SWEET蛋白包括7个跨膜结构域,其中包含2个MtN3/Saliva结构域,可分为4个进化分支。SWEET转运蛋白在多种生理和生化过程中发挥着关键作用,包括韧皮部装载、激素运输、营养和生殖生长等。结合当前SWEET转运蛋白的研究进展,重点总结了SWEET的发现、蛋白结构及其在糖转运中的生物学功能,指出目前植物SWEET基因研究面临的问题,并对未来SWEET蛋白的研究重点进行了展望:1)探究SWEET蛋白的底物识别机制;2)挖掘提高作物产量和品质的关键SWEET基因;3)利用SWEET基因编辑和磷酸化等策略改良作物产量和品质。

Sweet综合征的发病机制及治疗进展

Sweet综合征(Sweet syndrome, SS)是一种病因不明的炎症性嗜中性皮肤病,与感染、药物、肿瘤及自身免疫性疾病等相关。发病机制涉及中性粒细胞功能障碍、免疫失衡及遗传因素等。传统一线治疗首选系统应用糖皮质激素。近年来随着SS的研究取得一定进展,生物制剂及小分子靶向药物也有成功治疗SS的报道。本文就SS的发病机制及治疗进展作一综述。

Sweet综合征口腔黏膜表现1例报道及文献回顾

目的探讨Sweet综合征的口腔黏膜病损表现,为临床早发现并正确诊断该病提供参考。方法报道1例60岁女性Sweet综合征患者的口腔黏膜病损表现,并结合相关文献对Sweet综合征进行分析。结果患者双下肢皮肤红斑伴口腔黏膜破溃疼痛3 d,患者皮损症状较轻,但口腔黏膜多发性大面积糜烂,疼痛明显,故首诊于口腔科。患者发病过程中伴有发烧,体温38.5℃;实验室检查示C反应蛋白升高(35.2 mg/L),血沉加快(77.00 mm/h);患者两侧膝盖及下肢可见散在分布红色斑块,轻度压痛,皮损组织病理学检查示:真皮全层见散在不成熟中性粒细胞聚集灶浸润。根据患者临床体征和实验室检查,皮损组织病理结果的镜下符合Sweet综合征的表现,诊断为Sweet综合征。给予患者1 mL复方倍他米松注射液肌肉注射仅1次;患者对糖皮质激素治疗效果反应良好;口腔采用复方氯己定溶液含漱,病损黏膜处重组牛碱性成纤维细胞生长因子溶液外用,3次/d,疗程为1周;用药4 d后复诊,体温恢复正常,口腔病损明显减轻;2周后复诊,小腿及膝盖处红斑几乎全部消退,口腔黏膜病损基本消失;半年后随访,结果显示皮损未复发;2年后随访,病情稳定,病损未见复发。回顾相关文献表明,Sweet综合征是一种少见的病因不明的炎性反应性皮病,临床上可分为3种类型:特发型、肿瘤相关型以及药物诱导型,男女患病比为1∶4,典型临床表现为急性出现的疼痛性红色斑块或结节,病损多位于四肢,常伴发热,外周血中性粒细胞数目增多,血沉加快,C反应蛋白阳性。系统应用糖皮质激素是本病最重要的治疗方法,大多数患者可在短期内改善皮损,但可能会存在潜在感染或停药后复发的情况。部分Sweet综合征患者可伴有口腔病损,但目前有关Sweet综合征在口腔黏膜表现的病例报道却很少,使得临床容易误诊。结论口腔黏膜病损可能为Sweet综合征的皮肤外表现,应综合考虑患者的全身情况,尽快完善皮肤活检以明确诊断,以免延误病情。

油茶SWEET基因家族的全基因组鉴定及表达分析

【目的】挖掘参与油茶糖代谢及逆境响应的糖外排转运子(sugars will eventually be exported transporters,SWEETs)。【方法】利用生物信息学方法分析油茶SWEETs家族的基因结构、蛋白基序、染色体定位、共线性关系、启动子区顺式作用元件及上游调控因子等,并利用RT-qPCR分析CoSWEETs在不同时期、不同组织及不同逆境胁迫下的基因表达情况。【结果】从油茶中鉴定得到14个CoSWEETs基因,不均匀分布于10条染色体上,不同成员间内含子-外显子数目存在差异。根据系统进化关系,14个CoSWEETs可分为 4个分支,均具有1-2个MtN3 保守结构域,同一分支具有相似的基因结构和基序。根据启动子顺式作用元件和上游转录因子预测的分析结果,CoSWEETs启动子中含有多个与生长发育、植物激素和应激相关的调节元件,其表达可能受到ERF、DOF、BBR-BPC、MYB等转录因子的调控。RT-qPCR分析表明大部分CoSWEETs成员在果实和根中高表达,在种子中的表达水平与发育时期相关,并根据低温、高盐和干旱等非生物胁迫下CoSWEETs的表达模式挖掘出CoSWEET1、CoSWEET2、CoSWEET17等响应油茶低温、干旱或高盐胁迫的基因。【结论】CoSWEET基因的表达受到多种激素及转录因子调控,并在油茶种子发育与逆境胁迫响应中发挥重要作用。

基于CEEMDAN-VMD-TCN-lightGBM模型的水质预测研究

针对目前水质预测模型中因为数据本身的复杂性、在信号处理过程中存在的噪声干扰以及分解深度不够导致单一分解难以全面捕捉信号非线性特征的问题,提出了一种基于二次分解的水质预测模型。该模型采用完全自适应噪声集合经验模态分解(CEEMDAN)对原始数据进行分解,再利用变分模态分解(VMD)对熵值最高的模态分量进行二次分解,最终将处理后的时间序列输入到TCN-lightGBM多特征预测模型中。同时,采用麻雀算法(SSA)对预测模型进行优化。以山东省玉符河水质为例,本模型的均方根误差(RMSE)是0.1053,平均绝对误差(MAE)是0.0815,决定系数(R2)是0.9471,与GRU、LSTM、LightGBM、TCN等当下较为流行的模型的预测指标进行比较。结果显示,在R2上本模型提升了53.04%、70.41%、66.07%、65.20%等,在RMSE上减少了62.76%、65.50%、64.93%、64.80%等,在MAE上降低了62.76%、66.24%、63.80%、65.24%等。由此可知,基于CEEMDAN-VMD-TCN-lightGBM的模型具有更好的预测性能、泛化能力和捕捉信号非线性特征的能力。

Public health importance of light intensity physical activity

1.Light intensity physical activity(PA)benefits health PA guidelines worldwide recommend that adults accumulate 150 min of moderate intensity or 75 min of vigorous intensity PA(moderate-to-vigorous PA(MVPA))weekly to achieve health benefits.1-3 Absent from these guidelines are recommendations for light intensity PA(LPA,e.g.,walking at a leisurely pace of 3 km/h or less,equivalent to 1.5-2.9 metabolic equivalents).

Effects of thinning on the understory light environment of different stands and the photosynthetic performance and growth of the reforestation species Phoebe bournei

Light levels determine regeneration in stands and a key concern is how to regulate the light environment of different stand types to the requirements of the understory.In this study,we selected three stands typical in south China(a Cryptomeria japonica plantation,a Quercus acutissima plantation,and a mixed stand of both)and three thinning intensities to determine the best understory light environ-ment for 3-year-old Phoebe bournei seedlings.The canopy structure,understory light environment,and photosynthe-sis and growth indicators were assessed following thin-ning.Thinning improved canopy structure and understory light availability of each stand;species composition was the reason for differences in the understory light environ-ment.Under the same thinning intensity,the mixed stand had the greatest light radiation and most balanced spectral composition.P.bournei photosynthesis and growth were closely related to the light environment;all three stands required heavy thinning to create an effective and sustained understory light environment.In a suitable understory light environment,the efficiency of light interception,absorption,and use by seedlings was enhanced,resulting in a higher carbon assimilation the main limiting factor was stomatal conductance.As a shade-avoidance signal,red/far-red radia-tion is a critical factor driving changes in photosynthesis and growth of P.bournei seedlings,and a reduction increased light absorption and use capacity and height:diameter ratios.The growth advantage transformed from diameter to height,enabling seedlings to access more light.Our findings suggest that the regeneration of shade-tolerant species such as P.bournei could be enhanced if a targeted approach to thinning based on stand type was adopted.

溃疡性结肠炎合并Sweet综合征、玫瑰痤疮1例

患者女,43岁,因“面部反复红斑、丘疹,伴腹痛、腹泻”4年,复发1月,加重4d,于2021年4月第3次入我院。4年前患者因腹痛、腹泻伴面部红斑丘疹于我院住院,诊断“炎性肠病、面部激素依赖性皮炎”。1月前患者面部皮损、腹泻加重再次入院,结合病理检查结果诊断为“溃疡性结肠炎、玫瑰痤疮”。两次住院均使用激素、羟氯喹等治疗,好转后出院,但停药后病情反复。本次因面颈部、双上肢出现红色疼痛性斑块入院。结合病理检查结果诊断sweet综合征,予以甲泼尼龙40mg,皮损逐渐消退。

基于LightGBM的智能可穿戴设备用户行为预测

智能可穿戴设备产生的大量数据是人类宝贵的数字资源。使用开放数据集和主流数据分析工具,如可进行快速模型开发的PyCaret模块,有助于人们进行数据挖掘工作,且不被细节所困扰。作为Kaggle竞赛爱好者的常用工具,LightGBM分类器对用户行为的预测表现优异,对此文中的研究结果也得到验证。

CAEFusion: A New Convolutional Autoencoder-Based Infrared and Visible Light Image Fusion Algorithm

To address the issues of incomplete information,blurred details,loss of details,and insufficient contrast in infrared and visible image fusion,an image fusion algorithm based on a convolutional autoencoder is proposed.The region attention module is meant to extract the background feature map based on the distinct properties of the background feature map and the detail feature map.A multi-scale convolution attention module is suggested to enhance the communication of feature information.At the same time,the feature transformation module is introduced to learn more robust feature representations,aiming to preserve the integrity of image information.This study uses three available datasets from TNO,FLIR,and NIR to perform thorough quantitative and qualitative trials with five additional algorithms.The methods are assessed based on four indicators:information entropy(EN),standard deviation(SD),spatial frequency(SF),and average gradient(AG).Object detection experiments were done on the M3FD dataset to further verify the algorithm’s performance in comparison with five other algorithms.The algorithm’s accuracy was evaluated using the mean average precision at a threshold of 0.5(mAP@0.5)index.Comprehensive experimental findings show that CAEFusion performs well in subjective visual and objective evaluation criteria and has promising potential in downstream object detection tasks.

扁蓿豆SWEET基因家族鉴定及在干旱和寒冷胁迫下的表达分析

SWEET(Sugars will eventually be exported transporter)蛋白是一类新型糖转运蛋白。本研究基于扁蓿豆(Medicago ruthenica)基因组对MrSWEET基因家族进行了鉴定和生物信息学分析,并通过qPCR初步分析MrSWEET在干旱和寒冷环境下的表达模式,以期深入探究扁蓿豆SWEET基因家族在非生物胁迫中的作用。结果表明,扁蓿豆SWEET糖转运蛋白家族共有18个成员,都具有典型的MtN3_saliva/PQ-Loop结构域。系统发育分析表明,其可分为4个进化枝,其中CladeⅠ包括MrSWEET1a、-1b、-2a、-2b、-3a、-3b;CladeⅡ包括MrSWEET4~6;CladeⅢ包括MrSWEET9~15,MrSWEET16~17属于CladeⅣ。所有的MrSWEET成员都含有Motif 1、3、4、5,可能与糖转运蛋白的功能有关。MrSWEET基因启动子区域含有多个与光响应、激素响应和非生物胁迫以及植物生长发育有关的功能元件。在干旱(15%PEG6000)和寒冷(4℃)胁迫下,扁蓿豆根部的MrSWEET基因表达水平相对高于叶片,且根部大多数基因在干旱和寒冷胁迫处理6、12 h时表达量最高;干旱处理下,根部的MrSWEET1a和MrSWEET16相对表达量在3、6、12、24 h和7 d时均高于对照,寒冷处理下根部的MrSWEET16表达量以及处理7 d的MrSWEET1a表达量高于对照,说明其可能参与调控扁蓿豆对干旱和寒冷胁迫的响应。

An Investigation of Lighting Levels and Sleep Quality

Sleep quality in young adults is compromised. Instead of the recommended 7 hours, young adults’ schedule interruptions disturb sleep to a typical six and a half hours, with common disturbances in falling asleep and staying asleep. Recent literature has identified an association between academic performance, negative mood state and low activity level in young adults with sleep disturbances. Young adulthood is a time for the installation of sleep health. Both individual and schedule impositions to the young adults’ sleep schedule are to be modified to obtain Sleep Health. Recent research has identified daytime light effects on sleep such as blue light from electronics as alerting and low level light for relaxation. The aim of this study was to identify sleep quality effects with varying light exposures. It was hypothesized that bright (>450 lux) light conditions would be considered focusing and low light (<220 lux) would be considered calming. We hypothesized that sleep quality would improve by 5% with the introduction of a calm light condition. Undergraduates from a small midwestern university were invited to participate in the study in exchange for a gift card. Six participants completed the study, two males, four females all between 21 - 24 years old. Both hypotheses were supported by qualitative analysis.

Protein glycation:a wolf in sweet sheep’s clothing behind neurodegeneration

At the beginning of the 16th century,Paracelsus coined the maxim:“the dose makes the poison”.This principle can be applied to all living organisms,including organs and cells.The brain and its glial and neuronal cells are no exception.Even small compounds that are essential for the life of brain cells can become truly toxic when overdosed.

植物糖转运蛋白SWEETs研究进展

植物碳水化合物在“源流库”不同组织器官中的合成、代谢及转运对有机体维持正常生命活动至关重要。其中,以蔗糖、葡萄糖和果糖为代表的糖类短距离或长距离运输在源到库的“流”中占有关键作用,在此过程中,碳水化合物的转运与分配需要多种细胞糖转运体的协同参与。糖外排转运蛋白(SWEETs)能够调节植物营养的分配、利用,决定组织器官的生长与发育,维持或调节细胞糖响应浓度,调节寄主-病原体相互作用等生物与非生物胁迫。本综述介绍了SWEETs基因家族基本结构特征、生理功能和胁迫应答等方面的研究进展,对植物细胞生理功能的理解和生物育种等研究具有重要意义。

Effects of Different Light Qualities on the Growth Characteristics of Populus trinervis

Populus trinervis is native to China and plays an irreplaceable role in maintaining the ecological balance of boreal and temperate forests.P.trinervis mainly grows in high-altitude areas.At present,there are limited studies on the response of P.trinervis to different light qualities,so it is necessary to investigate the photosynthetic physiological changes of P.trinervis in different light environments.In our study,P.trinervis was grown for 8 months under light filtered by three different colored films.The three treatments were blue film,green film,and white plastic film.The effects of blue(B),green(G),and white(W)light on photosynthetic pigment content,absolute growth,photosynthetic parameters,soluble sugar content,and chlorophyll fluorescence parameters were studied,respectively.Compared to the Wtreatment,the chlorophyll a and b,carotenoids,total chlorophyll content(a+b),absolute growth of seedling height,net photosynthetic rate(PN),water use efficiency(WUE),total soluble sugars,sucrose,and nonphotochemical quenching(NPQ)of P.trinervis were significantly increased under B treatment.Meanwhile,chlorophyll a and b,carotenoids,total chlorophyll(a+b),transpiration rate(Tr),intercellular CO_(2) concentration(Ci),stomatal conductance(gs),absolute growth of seedling height and leaf length,reducing sugar,total soluble sugar content,and NPQ were significantly increased under G treatment.The results showed that the absolute growth and chlorophyll content of P.trinervis were increased under B light,while the sugar and photosynthetic parameters were increased under G light.Additional studies may look into how B light impacts absolute growth and promotional mechanisms,as well as how G light affects the accumulation of sugar levels.

Development characteristics and controlling factors of fractures in lacustrine shale and their geological significance for evaluating shale oil sweet spots in the third member of the Shahejie Formation in the Qikou Sag, Bohai Bay Basin

Natural fractures are critical for shale oil and gas enrichment and development. Due to the extremely high heterogeneity of shale, the factors controlling the formation of internal fractures, especially horizontal fractures, remain controversial. In this study, we integrate thin section analysis and microcomputed tomography(CT) data from several lacustrine shale samples from the third member(Es3) of the Shahejie Formation, Qikou Sag, Bohai Bay Basin, to assess the fractures in detail. The goal is to reveal the development characteristics, controlling factors, and geological significance for evaluating sweet spots in a shale oil play. The fractures in the Es3contain high-angle structural and horizontal bed-parallel fractures that are mostly shear and extensional. Various factors influence fracture development,including lithofacies, mineral composition, organic matter content, and the number of laminae. Structural fractures occur predominantly in siltstone, whereas bed-parallel fractures are abundant in laminated shale and layered mudstone. A higher quartz content results in higher shale brittleness, causing fractures, whereas the transformation between clay minerals contributes to the development of bedparallel fractures. Excess pore pressure due to hydrocarbon generation and expulsion during thermal advance can cause the formation of bed-parallel fractures. The density of the bed-parallel and structural fractures increases with the lamina density, and the bed-parallel fractures are more sensitive to the number of laminae. The fractures are critical storage spaces and flow conduits and are indicative of sweet spots. The laminated shale in the Es3with a high organic matter content contains natural fractures and is an organic-rich, liquid-rich, self-sourced shale play. Conversely, the siltstone, massive mudstone, and argillaceous carbonate lithofacies contain lower amounts of organic matter and do not have bed-parallel fractures. However, good reservoirs can form in these areas when structural fractures are present and the source, and storage spaces are separated.

Commentary on “Does light-intensity physical activity moderate the relationship between sitting time and adiposity markers in adolescents?”

In the September 2022 issue of the Journal of Sport and Health Science,Ayala et al.1 published results from a cross-sectional study where they tested the hypothesis that light intensity physical activity(LIPA,1.6-2.9 metabolic equivalents(METs))moderates the relationship between sitting time and adiposity in 219 Australian adolescents aged 14±1.6 years(mean±SD).