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| 1 | ZmMs30 Encoding a Novel GDSL Lipase Is Essential for Male Fertility and Valuable for Hybrid Breeding in Maize显示文摘Genic male sterility (GMS) is very useful for hybrid vigor utilization and hybrid seed production. Although a large number of GMS genes have been identified in plants, little is known about the roles of GDSL lipase members in anther and pollen development. Here, we report a maize GMS gene, ZmMs30, which encodes a novel type of GDSL lipase with diverged catalytic residues. Enzyme kinetics and activity assays show that ZmMs30 has lipase activity and prefers to substrates with a short carbon chain. ZmMs30 is specifically expressed in maize anthers during stages 7-9. Loss of ZmMs30 function resulted in defective anther cuticle, irregular foot layer of pollen exine, and complete male sterility. Cytological and lipidomics analyses demonstrate that ZmMs30 is crucial for the aliphatic metabolic pathway required for pollen exine formation and anther cuticle development. Furthermore, we found that male sterility caused by loss of ZmMs30 function was stable in various inbred lines with different genetic background, and that it didn't show any negative effect on maize heterosis and production, suggesting that ZmMs30 is valuable for crossbreeding and hybrid seed production. We then developed a new multi-control sterility system using ZmMs30 and its mutant line, and demonstrated it is feasible for generating desirable GMS lines and valu. able for hybrid maize seed production. Taken together, our study sheds new light on the mechanisms of anther and pollen development, and provides a valuable male-sterility system for hybrid breeding maize. | Xueli An Zhenying Dong Youhui Tian Ke Xie Suowei Wu Taotao Zhu Danfeng Zhang Van Zhou Canfang Niu Biao Ma Quancan Hou Jianxi Bao Simiao Zhang Ziwen Li Yanbo Wang Tingwei Yan Xiaojing Sun Yuwen Zhang Jinping Li Xiangyuan Wan | 2019 | Molecular Plant2019，12，3： | 15 |
| 2 | Factors Predicting Progression to Severe COVID-19: A Competing Risk Survival Analysis of 1753 Patients in Community Isolation in Wuhan, China显示文摘Most studies of coronavirus disease 2019(COVID-19)progression have focused on the transfer of patients within secondary or tertiary care hospitals from regular wards to intensive care units.Little is known about the risk factors predicting the progression to severe COVID-19 among patients in community iso-lation,who are either asymptomatic or suffer from only mild to moderate symptoms.Using a multivari-able competing risk survival analysis,we identify several important predictors of progression to severe COVID-19—rather than to recovery—among patients in the largest community isolation center in Wuhan,China from 6 February 2020(when the center opened)to 9 March 2020(when it closed).All patients in community isolation in Wuhan were either asymptomatic or suffered from mild to moderate COVID-19 symptoms.We performed competing risk survival analysis on time-to-event data from a cohort study of all COVID-19 patients(n=1753)in the isolation center.The potential predictors we inves-tigated were the routine patient data collected upon admission to the isolation center:age,sex,respira-tory symptoms,gastrointestinal symptoms,general symptoms,and computed tomography(CT)scan signs.The main outcomes were time to severe COVID-19 or recovery.The factors predicting progression to severe COVID-19 were:male sex(hazard ratio(HR)=1.29,95%confidence interval(CI)1.04–1.58,p=0.018),young and old age,dyspnea(HR=1.58,95%CI 1.24–2.01,p<0.001),and CT signs of ground-glass opacity(HR=1.39,95%CI 1.04–1.86,p=0.024)and infiltrating shadows(HR=1.84,95%CI 1.22–2.78,p=0.004).The risk of progression was found to be lower among patients with nausea or vomiting(HR=0.53,95%CI 0.30–0.96,p=0.036)and headaches(HR=0.54,95%CI 0.29–0.99,p=0.046).Our results suggest that several factors that can be easily measured even in resource-poor set-tings(dyspnea,sex,and age)can be used to identify mild COVID-19 patients who are at increased risk of disease progression.Looking for CT signs of ground-glass opacity and infiltrating shadows may be an affordable option to support triage decisions in resource-rich settings.Common and unspecific symptoms(headaches,nausea,and vomiting)are likely to have led to the identification and subsequent community isolation of COVID-19 patients who were relatively unlikely to deteriorate.Future public health and clinical guidelines should build on this evidence to improve the screening,triage,and monitoring of COVID-19 patients who are asymtomatic or suffer from mild to moderate symptoms. | Simiao Chen Hui Sun Mei Heng Xunliang Tong Pascal Geldsetzer Zhuoran Wang Peixin Wu Juntao Yang Yu Hu Chen Wang Till Bärnighausen | 2022 | Engineering2022，8，6： | 1 |
| 3 | Headspace Solid-Phase Micro-Extraction Gas Chromatography/Mass Spectrometry(HS-SPME-GC/MS)-Based Untargeted Metabolomics Analysis for Comparing the Volatile Components from 12 Panax Herbal Medicines显示文摘Quality control of ginseng currently is mainly based on ginsenoside analysis,but rarely focuses on the volatile organic components.In the current work,an untargeted metabolomics approach,by headspace solid-phase micro-extraction gas chromatography/mass spectrometry(HS-SPME-GC/MS),was elaborated and further employed to holistically compare the compositional difference of the volatile components simultaneously from 12 Panax herbal medicines,which included P.ginseng(PG),P.quinquefolius(PQ),P.notoginseng(PN),red ginseng(PGR),P.ginseng leaf(PGL),P.quinquefolius leaf(PQL),P.notoginseng leaf(PNL),P.ginseng flower(PGF),P.quinquefolius flower(PQF),P.notoginseng flower(PNF),P.japonicus(PJ),and P.japonicus var.major(PJvm).Chromatographic separation was performed on an HP-5MS elastic quartz capillary column using helium as the carrier gas,enabling good resolution within 1 h.We were able to characterize totally 259 volatile compounds,including 82 terpenes(T),46 alcohols(Alc),29 ketones(K),25 aldehydes(Ald),21 esters(E),and the others.By analyzing 90 batches of ginseng samples based on the untargeted metabolomics workflows,236 differential ions were unveiled,and accordingly 36 differential volatile components were discovered.It is the first report that simultaneously compares the compositional difference of volatile components among 12 Panax herbal medicines,and useful information is provided for the quality control of ginseng aside from the well-known ginsenosides. | Simiao Wang Xiaohang Li Meiting Jiang Xinlong Wu Yuying Zhao Meiyu Liu Xiaoyan Xu Huimin Wang Hongda Wang Heshui Yu Wenzhi Yang | 2022 | Phyton-International Journal of Experimental Botany2022，91，7： | 1 |
| 4 | Hyperdense artery sign, symptomatic infarct swelling and effect of alteplase in acute ischaemic stroke显示文摘Background Alteplase improves functional outcomes of patients with acute ischaemic stroke,but its effects on symptomatic infarct swelling,an adverse complication of stroke and the influence of CT hyperdense artery sign(HAS)are unclear.This substudy of the Third International Stroke Trial aimed to investigate the association between HAS and symptomatic infarct swelling and effect of intravenous alteplase on this association.Methods We included stroke patients whose prerandomisation scan was non-contrast CT.Raters,masked to clinical information,assessed baseline(prerandomisation)and follow-up(24-48 hours postrandomisation)CT scans for HAS,defined as an intracranial artery appearing denser than contralateral arteries.Symptomatic infarct swelling was defined as clinically significant neurological deterioration≤7 days after stroke with radiological evidence of midline shift,effacement of basal cisterns or uncal herniation.Results Among 2961 patients,HAS presence at baseline was associated with higher risk of symptomatic infarct swelling(OR 2.21;95% CI 1.42 to 3.44).Alteplase increased the risk of swelling(OR 1.69;95% CI 1.11 to 2.57),with no difference between patients with and those without baseline HAS(p=0.49).In patients with baseline HAS,alteplase reduced the proportion with HAS at follow-up(OR 0.67;95% CI 0.50 to 0.91),where HAS disappearance was associated with reduced risk of swelling(OR 0.25,95% CI 0.14 to 0.47).Conclusion Although alteplase was associated with increased risk of symptomatic infarct swelling in patients with or without baseline HAS,it was also associated with accelerated clearance of HAS,which in return reduced swelling,providing further mechanistic insights to underpin the benefits of alteplase. | Simiao Wu Grant Mair Geoff Cohen Zoe Morris Anders von Heijne Nick Bradey Lesley Cala Andre Peeters Andrew J Farrall Alessandro Adami Gillian Potter Ming Liu Richard I Lindley Peter A G Sandercock Joanna M Wardlaw the IST-3 Collaborative Group | 2021 | Stroke & Vascular Neurology2021，6，2： | 1 |
| 5 | Edaravone improves functional and structural outcomes in animal models of focal cerebral ischemia:A systematic review显示文摘 | Simiao Wu Emily Sena Kieren Egan | 2014 | International Journal of Stroke2014，9，： | 1 |
| 6 | Edaravone improves functional and structural outcomes in animal models of focal cerebral ischemia: A systematic review显示文摘 | Simiao Wu Emily Sena Kieren Egan Malcolm Macleod Gillian Mead | 2014 | Int J Stroke2014，，1： | 1 |
| 7 | Exploring heteroepitaxial growth and electrical properties of α-Ga_(2)O_(3) films on differently oriented sapphire substrates显示文摘This study explores the epitaxial relationship and electrical properties of α-Ga_(2)O_(3) thin films deposited on a-plane, mplane, and r-plane sapphire substrates. We characterize the thin films by X-ray diffraction and Raman spectroscopy, and elucidate thin film epitaxial relationships with the underlying sapphire substrates. The oxygen vacancy concentration of α-Ga_(2)O_(3) thin films on m-plane and r-plane sapphire substrates are higher than α-Ga_(2)O_(3) thin film on a-plane sapphire substrates. All three thin films have a high transmission of over 80% in the visible and near-ultraviolet regions, and their optical bandgaps stay around 5.02–5.16 eV. Hall measurements show that the α-Ga_(2)O_(3) thin film grown on r-plane sapphire has the highest conductivity of 2.71 S/cm, which is at least 90 times higher than the film on a-plane sapphire. A similar orientation-dependence is seen in their activation energy as revealed by temperature-dependent conductivity measurements, with 0.266, 0.079, and 0.075eV for the film on a-, m-, r-plane, respectively. The origin of the distinct transport behavior of films on differently oriented substrates is suggested to relate with the distinct evolution of oxygen vacancies at differently oriented substrates. This study provides insights for the substrate selection when growing α-Ga_(2)O_(3) films with tunable transport properties. | Wei Wang Shudong Hu Zilong Wang Kaisen Liu Jinfu Zhang Simiao Wu Yuxia Yang Ning Xia Wenrui Zhang Jichun Ye | 2023 | Journal of Semiconductors2023，44，6： | 0 |
| 8 | Synthesis and Antitumor Activity of Sorafenib Analogs Containing a Tetrazole Moiety显示文摘A novel series of diaryl biuret derivatives containing a tetrazole moiety was designed and synthesized.All the target compounds were evaluated for their in vitro antitumor activity against HT-29,HepG2,MCF-7 and A549 cells by MTT assay.Most of them exhibited obvious antitumor activity,and four of them(4a,4c,4h and 7a)were superior to sorafenib in general.Among them,Compound 4h displayed more potent activity than sorafenib in all tested cancer cells.Compound 4c exhibited the most outstanding activity in inhibition of growth of HepG2 cells(IC50=0.55 μmol/L).Further,they both revealed favorable metabolic stability in in vitro assay.Compounds 4c and 4h are promising candidates for further development. | TIAN Ye YU Simiao CAI Lude GONG Guowei WU Guodong QI Hongxia ZHAO Yanfang QIN Mingze | 2019 | Chemical Research in Chinese Universities2019，35，1： | 0 |
| 9 | Precision management of brain oedema after acute ischaemic stroke显示文摘Dear Editor,Stroke is a leading cause of death and disability in the world,with acute ischaemic stroke accounting for∼70%of all cases.1 Some degree of brain oedema occurs in all cases of acute ischaemic stroke and,when severe,has major consequences on survivalfree of disability.Pathophysiological studies indicate an evolution of cytotoxic oedema,ionic oedema,and vasogenic oedema,2 which implies brain oedema is a dynamic process and explains the various terminology used,such as large hemispheric infarction,symptomatic infarct swelling,space-occupying infarction,or malignant middle cerebral artery(MCA)infarction.Heterogeneity in manifestations and sequelae necessitates a new,precision medicine approach to individualizing prevention and treatment of brain oedema after stroke. | Simiao Wu Craig S Anderson | 2022 | Precision Clinical Medicine2022，5，3： | 0 |
| 10 | Low Concordance Between Blood Pressures Measured in Periodic Health Examinations and in a Workplace-Based Hypertension Management Program显示文摘Poor adherence to standard protocols of blood pressure(BP)measurement in routine clinical practice leads to higher readings than“research-quality”measurements.Whether this phenomenon exists in periodic health examinations was unknown.We aimed to explore the concordance between BP measurements in periodic health examinations and those measured following a standard measurement protocol.We used data from the Kailuan Study,an ongoing longitudinal cohort study in China,of which participants received biennial health examinations in health management centers.In addition,BPs were measured following standard protocols in a workplace-based hypertension management program nested in the Kailuan Study.We compared BP readings of the same person between the two settings using generalized linear mixed-effects models.A total of 3988 men(the mean age was 44.9 years)had at least two BP measurements both in health examinations and management program with a time interval between the two settings that less than 90 days.The mean systolic blood pressures(SBP)and diastolic blood pressures(DBP)in health examinations were 4.2(95%CI 3.9–4.5)mm Hg and 3.3(95%CI 3.1–3.5)mm Hg higher than those in the management program,respectively.Bland–Altman analyses showed the wide agreement inter-vals ranging from-27.7-to 36.5-mm Hg for SBP and-18.3-to 24.7-mm Hg for DBP.In conclusion,BP measurements in periodic health examinations were generally higher than BPs measured following a standard protocol.Our findings highlight the importance of standard BP measurement to avoid overestimation of hypertension prevalence and treatment initiation. | Jun-Xiang Chen Yan-Feng Zhou Tingting Geng Simiao Chen Shuohua Chen Guodong Wang Yan-Bo Zhang Yi Wang Zhou-Zheng Tu Gang Liu Shouling Wu An Pan | 2022 | Phenomics2022，2，6： | 0 |
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