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33篇 您的检索式:作者名="MA Yanfang"
    题名 作者 年代 出处 被引量
1Shamanskii-Like Levenberg-Marquardt Method with a New Line Search for Systems of Nonlinear Equations显示文摘To save the calculations of Jacobian,a multi-step Levenberg-Marquardt method named Shamanskii-like LM method for systems of nonlinear equations was proposed by Fa.Its convergence properties have been proved by using a trust region technique under the local error bound condition.However,the authors wonder whether the similar convergence properties are still true with standard line searches since the direction may not be a descent direction.For this purpose,the authors present a new nonmonotone m-th order Armijo type line search to guarantee the global convergence.Under the same condition as trust region case,the convergence rate also has been shown to be m+1 by using this line search technique.Numerical experiments show the new algorithm can save much running time for the large scale problems,so it is efficient and promising.CHEN Liang MA Yanfang 2020Journal of Systems Science & Complexity2020,33,5:8
2Hematopoietic stem cell-derived exosomes promote hematopoietic differentiation of mouse embryonic stem cells in vitro via inhibiting the miR126/Notch1 pathway显示文摘导出房间的 exosomes (前) 能经由他们带了的 microRNAs (米尔) 调制目标房间区别。以前的研究证明了 miR126 高度在造血的干细胞(HSC ) 被表示并且经由 modulating 在造血作用起一个作用参予祖先房间命运决定的槽口小径。在这研究,我们调查了导出 HSC 的前(HSC 前) 是否能影响老鼠的区别胚胎的干细胞(转换字符) 进 HSC。我们准备了 HSC 前 反对 ,HSC 前 sc 和 HSC 前 从控制 HSC 和 HSC transfected 与的 miR126 爬控制或 miR126 分别地模仿。HSC 前被 ultracentrifugation 孤立并且分析了使用追踪分析的 nanoparticle。我们孵化了在一个 10-d 区别正式就职时期上与老鼠转换字符收集了前,在哪个 HSC 前和槽口小径使活跃之物期间(Jagged1, 100 ng/mL ) 被加到文化每 3 d。在在转换字符的 10-d 区别时期, miR126 的表示层次, SSEA1, CD117, Sca1, Notch1 和 Hes1 被估计以后。产生 HSC 被流动 cytometry 对 HSC 标记(CD117, CD34 和 Sca1 ) 用抗体验证。我们的结果揭示了那:(1 ) 有 miR126 的 transfection 在 HSC 前 miR126 。(2 )HSC 前合作文化支持了老鼠转换字符区别进 HSC,最突出的效果在 HSC 前 miR126 合作文化。(3 ) HSC 区别被减少的 SSEA1 表示验证并且增加了 CD117 和 Sca1 表示。(4 )HSC 前引起的所有效果被 Notch1 和 Hes1 表示的重要减小伴随,这样 Notch1/Hes1 小径的抑制,而由 Jagged1 的槽口的激活废除了 HSC 前 miR126 。在结论, HSC 前由禁止 miR126/Notch1 小径在 vitro 支持老鼠转换字符的造血的区别。Feng-ling LIAO Lin TAN Hua LIU Jin-ju WANG Xiao-tang MA Bin ZHAO Yanfang CHEN Ji BIHL Yi YANG Ri-ling CHEN 2018Acta Pharmacologica Sinica2018,39,4:7
3Famitinib in combination with concurrent chemoradiotherapy in patients with locoregionally advanced nasopharyngeal carcinoma: a phase 1, open-label, dose-escalation Study显示文摘Background:Famitinib is a tyrosine kinase inhibitor against multiple targets,including vascular endothelial growth factor receptor 2/3,platelet-derived growth factor receptor,and stem cell factor receptor(c-kit).Previous studies have demonstrated anti-tumour activities of famitinib against a wide variety of advanced-stage solid cancers.We aimed to determine the safety and efficacy of famitinib with concurrent chemoradiotherapy(CCRT)in patients with locoregionally advanced nasopharyngeal carcinoma(NPC).We also evaluated the feasibility of contrast-enhanced ultrasound(D-CEUS)as a predictor of early tumour response to famitinib and to correlate functional parameters with clinical efficacy.Methods:The trial was conducted in subjects with stage III or IVa-b NPC using a 3+3 design of escalating fami-tinib doses.Briefly,subjects received 2 weeks of famitinib monotherapy followed by 7 weeks of famitinib plus CCRT.D-CEUS of the neck lymph nodes was performed at day 0,8 and 15 after famitinib was administered before starting concurrent chemoradiotherapy.End points included safety,tolerability and anti-tumour activity.Results:Twenty patients were enrolled(six each for 12.5,16.5 and 20 mg and two for 25 mg).Two patients in the 25 mg cohort developed dose-limiting toxicities,including grade 4 thrombocytopenia and grade 3 hypertension.The most common grade 3/4 adverse events were leukopenia,neutropenia and radiation mucositis.D-CEUS tests showed that more than 60%of patients achieved a perfusion parameter response after 2 weeks taking famitinib alone,and the parameter response was associated with disease improvement.In the famitinib monotherapy stage,three patients(15%)showed partial responses.The complete response rate was 65%at the completion of treatment and 95%3 months after the treatment ended.After a median follow-up of 44 months,the 3-year progression-free survival(PFS)and distant metastasis-free survival were 70%and 75%,respectively.Subjects with a decrease of perfusion parameter response,such as peak intensity decreased at least 30%after 1 week of famitinib treatment,had higher 3-year PFS(90.9%vs.44.4%,95%CI 73.7%-100%vs.11.9%-76.9%,P<0.001)than those with an increase or a reduction of less than 30%.Conclusions:The recommended famitinib dose for phase II trial is 20 mg with CCRT for patients with local advanced NPC.D-CEUS is a reliable and early measure of efficacy for famitinib therapies.Further investigation is required to confirm the effects of famitinib plus chemoradiotherapy.Qiuyan Chen Linquan Tang Na Liu Feng Han Ling Guo Shanshan Guo Jianwei Wang Huai Liu Yanfang Ye Lu Zhang Liting Liu Pan Wang Yingqin Li Qingmei He Xiaoqun Yang Qingnan Tang Yang Li YuJing Liang XueSong Sun Chuanmiao Xie Yunxian Mo Ying Guo Rui Sun Haoyuan Mo Kajia Cao Xiang Guo Musheng Zeng Haiqiang Mai Jun Ma 2018Cancer Communications2018,38,1:6
4Clinical spectrum and prognostic value of TP53 mutations in circulating tumor DNA from breast cancer patients in China显示文摘Background:TP53 mutations are common in breast cancer.There is currently no large-scale cohort study to investigate the TP53 landscape in breast cancer patients from China.The predictive value of TP53 mutations for the efficacy of human epidermal growth factor receptor 2(HER2)-targeted therapy in breast cancer remains controversial.In the present study,we aimed to analyze the clinical spectrum and prognostic value of TP53 mutations in circulating tumor DNA(ctDNA)from breast cancer patients in China.Methods:We retrospectively analyzed the clinical data and TP53 mutation features in ctDNA samples from 804 patients withmetastatic breast cancer.TP53 mutations were detected by target region capture-based next-generation sequencing.The relationship between TP53 mutation status and disease-free survival(DFS)was analyzed in 444 patientswithmetastatic breast cancer.Moreover,the relationship between TP53 mutation status and progression-free survival(PFS)was analyzed in 55 HER2-positive patients treated with first-line trastuzumab-based therapy.Kaplan-Meier analysis was performed to estimate the survival curves of the different subgroups,and the log-rank test was used to compare the curves.A Cox regression model was used to estimate multivariable-adjusted hazard ratios and their 95%confidence intervals(CIs)associated with the DFS and PFS.Results:Among the 804 investigated patients,431(53.6%)patients harbored TP53 mutations.TP53 mutations were differentially distributed among different molecular subtypes of breast cancer(P<0.05).Patients with TP53 mutations had a shorter DFS than those with wild-type TP53(hazard ratio=1.32,95%CI=1.09-1.61,P=0.005).TP53 mutations in exons 5-8 were associated with worse outcome(hazard ratio=1.50,95%CI=1.11-2.03,P=0.009).However,TP53 mutation status was not significantly associated with PFS in HER2-positive patients who received firstline trastuzumab-based therapy(P=0.966).Interestingly,in the taxane combination group,patients with TP53 mutations exhibited longer PFS than those without TP53 mutations(hazard ratio=0.08,95%CI=0.02-0.30,P<0.001).However,in the nontaxane combination group,patients with TP53 mutations displayed shorter PFS than those with wild-type TP53(hazard ratio=4.84,95%CI=1.60-14.66,P=0.005).Conclusions:TP53 mutations in exons 5-8 may be an independent prognostic marker for short DFS in patients with metastatic breast cancer.TP53 mutations had opposite effects on trastuzumab-treated patients treated with and without taxanes.Zongbi Yi Fei Ma Guohua Rong Yanfang Guan Chunxiao Li Binghe Xu 2020Cancer Communications2020,40,6:5
5Large-scale synthesis of N-doped carbon capsules supporting atomically dispersed iron for efficient oxygen reduction reaction electrocatalysis显示文摘The large-scale synthesis of platinum-free electrocatalysts for the oxygen reduction reaction(ORR)remains a grand challenge.We report the large-scale production of stable and active ORR electrocatalysts based on iron,an earth-abundant element.A core–shell zeolitic imidazolate framework–tannic acid coordination polymer composite(ZIF-8@K-TA)was utilized as the catalyst precursor,which was transformed into iron atoms dispersed in hollow porous nitrogen-doped carbon capsules(H-Fe-N_(x)-C)through ion exchange and pyrolysis.H-Fe-N_(x)-C fea-tures site-isolated single-atom iron centers coordinated to nitrogen in graphitic layers,high levels of nitrogen doping,and high permeability to incoming gases.Benefiting from these characteristics,H-Fe-N_(x)-C demonstrated efficient electrocatalytic activity(E_(1/2)=0.92 V,vs.RHE)and stability towards the ORR in both alkaline and acidic media.In ORR performance,it surpassed the majority of recently reported Fe-N-C catalysts and the standard Pt/C catalyst.In addition,H-Fe-N_(x)-C showed outstanding tolerance to methanol.Hui Yang Yanfang Liu Xiaolu Liu Xiangke Wang He Tian Geoffrey I.N.Waterhouse Paul E.Krugere Shane GTelfer Shengqian Ma 2022eScience2022,2,2:4
6Sulfur-decorated nanomesh graphene for high-performance supercapacitors显示文摘Sulfur-decorated nanomesh graphene(S@G) has been synthesized by a 155℃ heat treatment of a mixture of nanomesh graphene and S. The as-obtained S@G materials keep a high specific surface area,and exhibit obviously enhanced conductivity and hydrophilicity as compared to the pristine graphene.X-ray photoelectron spectroscopy and thermogravimetric analysis indicate that most S atoms in the S@G samples are stably combined with nanomesh graphene via covalent bonds rather than exist as free elemental S. As an electrode material for aqueous supercapacitors, the S@G with a S content of 5 wt% delivers a specific capacitance up to 257 F/g at the current density of 0.25 A/g, which is 23.6% higher than that of the undoped graphene. Our results provide a simple approach to scalable synthesis of S-doped porous carbon materials, which have potential applications in the high-performance capacitive energy storage devices.Yanfang Kan Guoqing Ning Xinlong Ma 2017Chinese Chemical Letters2017,28,12:3
7Recombinant human PDCD5 protein enhances chemosensitivities of hematologic malignancies显示文摘PDCD5 is a novel apoptosis-related gene. Overexpression of PDCD5 facilitates apoptosis in various tumor cells. Here, we investigated the roles of recombinant human PDCD5 (rhPDCD5) protein in chemosensitivities of hematologic malignancies. The rhPDCD5 increased the in vitro cytotoxicity of daunorubicin (DNR), adriamycin (ADM) and As2O3 in three hematologic tumor cell lines. In vivo studies showed that DNR combined with rhPDCD5 significantly suppressed tumor growth of U937 xenograft nude mice compared with DNR alone. In conclusion, rhPDCD5 combined with the chemotherapeutic drug has greater efficacy than chemotherapy alone, and rhPDCD5 is a very promising chemosensitizer.WANG YanFang SHI Lin SONG QuanSheng ZHANG YingMei LOU YaXin ZHENG Yi MA DaLong WANG Ying KE XiaoYan 2009Chinese Science Bulletin2009,54,21:3
8Generation of a series of mutant lines resistant to imidazolinone by screening an EMS-based mutant library in common wheat显示文摘The breeding of herbicide-resistant wheat varieties has helped control weeds in wheat fields economically and effectively.Imidazolinone (IMI) herbicides are popular as they have low toxicity in mammals,are effective at small doses,and exhibit broad-spectrum herbicidal action in the field.Therefore,the isolation and genetic and molecular characterization of IMI-resistant wheat mutants will enhance weed management in wheat fields.In the present study,352 IMI-resistant plants were isolated by genetic screening from a mutant pool prepared by EMS-based random mutagenesis.Cloning of the mutated genes from the IMI-resistant plants indicated that ten taals alleles had been isolated,and mutation in one of three Ta ALS homolog genes conferred IMI resistance,and such a mutation is a dominant trait.Further analysis showed that taals-d exhibited the greatest IMI resistance,whereas taals-b exhibited the weakest resistance to IMI among three homologous taals mutants.In terms of IMI resistance,the taals triple mutant was stronger than the taals double mutants,and the taals double mutants were stronger than the single mutants,indicating a dose-dependent effect of the Ta ALS mutation on IMI resistance in wheat.Biochemical analysis indicated that the mutation in Ta ALS increased the tolerance of Ta ALS to inhibition by IMI.Our work details the genetic and molecular characterization of als wheat mutants,provides a foundation for understanding IMI resistance and breeding wheat varieties with herbicide resistance,and indicates that genetic screening using a mutagenized pool is an effective and important means of breeding crops with additional desired agricultural traits.Zhuo Chen Zheng Wang Yanfang Heng Jian Li Jiawei Pei Ying Cao Xing Wang Deng Ligeng Ma 2021The Crop Journal2021,9,5:3
9Mutational characteristics determined using circulating tumor DNA analysis in triple-negative breast cancer patients with distant metastasis显示文摘Dear editor,Breast cancer has been considered as the most common malignancy and the leading cause of death in women worldwide[1].Triple-negative breast cancer(TNBC)accounts for 10%-20%of breast cancers,which are characterized by the absence of estrogen receptor(ER),progesterone receptor(PR),and amplification of human epidermal growth factor receptor 2(HER2)[2].TNBC is well known for its rapid progressiveness,high rate of distant organ recurrence,and poor prognosis.Metastasis remains the major cause of death for patients with TNBCs.Up to date,the only direct treatment for metastatic TNBCs is chemotherapy,which has been challenged by tumor heterogeneity and drug resistance.Lack of effective targeted therapy for metastatic TNBCs impels researchers to focus on discovering potentially actionable targets through mutational profiling.Guohua Rong Zongbi Yi Fei Ma Yanfang Guan Yaping Xu Lifeng Li Binghe Xu 2020Cancer Communications2020,40,12:2
10Two-thirds simulation indexes and modal logic characterization显示文摘三分之二模拟关于一个说明提供对实现的一种抽象描述。以便描绘近似三分之二模拟,我们建议表示在过程之间的一种二元的关系是三分之二模拟的到度的三分之二个模拟索引的定义。-two-thirds 模拟和它的 substitutivity 法律在这份报纸被给。并且基于 -two-thirds 模拟,我们在场为描述在过程之间的近似的度的一个措施模型。特别地,我们给 -two-thirds 模拟的形式的逻辑描述。Yanfang MA Min ZHANG Yixiang CHEN Liang CHEN 2011Frontiers of Computer Science2011,5,4:2
11Traditional Chinese Medicine guidelines for coronavirus disease 2019显示文摘OBJECTIVE:To summarize the evidence from Traditional Chinese Medicine(TCM)practice in the treatment of coronavirus disease 2019(COVID-19)and provide timely clinical practice guidance.METHODS:The guidelines were developed in accordance with the World Health Organization rapid guideline process.The evidence on TCM for COVID-19 from published guidelines,direct and indirect published clinical evidence,first hand clinical data,and expert experience and consensus were collected.The grading of recommendations assessment,development and evaluation(GRADE)method was used to grade the evidence and make the recommendations.RESULTS:Based on the available evidence,the guidelines recommended 17 Chinese medicines for COVID-19:2 Chinese herbal granules,7 Chinese patent medicines,and 8 Chinese herbal injections.CONCLUSION:As the literature search was conducted on March,any subsequent versions of these guidelines require an up-to-date literature review.We hope that the evidence summary in these guidelines will be helpful in global efforts to address COVID-19.Liang Ning Ma Yanfang Wang Jingya Li Huizhen Wang Xiaohui Jiao Liwen Liu Bin Ma Yan Zhao Chen Luo Xufei Zhao Siya Lu Meng Cao Jin Hu Wenpin Zhang Hairong Liu Guoxiu Lu Cheng Liu Mengyu Li Li Han Xuejie Liu Yuqi Wang Liying Zhao Xueyao Wei Dongfeng Bai Jing Sun Mingyu Yang Yong Wu Xiaodan Chen Yaolong Shi Nannan Wang Yanping Wang Yongyan 2020Journal of Traditional Chinese Medicine2020,40,6:2
12A new modified King-Werner method for solving nonlinear equations显示文摘CHEN Liang MA Yanfang 0,,:1
13Semilocal convergence for a fifth-order Newton's method using recurrence relations in Banach spaces显示文摘CHEN Liang GU Chuanqing MA Yanfang 0,,:1
14The first application of isoindigo-based polymers in non-fullerene organic solar cells显示文摘Although isoindigo(IID)-based polymers can realize high charge mobility,these materials are currently confined to fullerenebased organic solar cells(OSCs).Herein,we designed a pair of alternative D-π-A type copolymers,PE71 and PE72,to expand the application in non-fullerene OSCs,where benzo[1,2-b:4,5-b′]thiophene(BDT),thieno[3,2-b]thiophene(TT)and IID units were used as D,A andπ-bridge,respectively.The aim of optimizing the length of alkyl chains on TT bridge is to ensure polymer solubility,crystallinity as well as miscibility with acceptor molecules.We find that PE71 and PE72 exhibit similar optical and electronic properties,but PE71 with shorter hexyl chain tends to aggregate into fiber-like structure.In the end,Y6 is selected as the electron acceptor because of suitable energy levels and complementary absorption spectrum.Finally,PE71:Y6 device realizes a power conversion efficiency(PCE)of 12.03%,which is obviously higher than that of PE72:Y6 device(9.74%)and is also the highest value for IID-based photovoltaic polymers.The charge transport,molecular aggregation,film morphology and energy loss analysis were systematically investigated.The improved photovoltaic performance of PE71:Y6 mainly originates from the better interpenetrating network structure toward facilitating exciton seperation and free charge carrier transportation.Our results indicate that IID-based D-π-A polymers can also be utilized in non-fullerene OSCs and the alkyl chains on the thieno[3,2-b]thiopheneπ-bridge have a vital effect on the photovoltaic performance.Bao Zhang Ning An Hongbo Wu Yanfang Geng Yanming Sun Zaifei Ma Weiwei Li Qiang Guo Erjun Zhou 2020Science China Chemistry2020,63,9:1
15Phytochemical and Bioactive Studies on Conyza blinii显示文摘For Ph. D. Degree: Su Yanfang Supervisors: Prof: Zheng Junhua, Prof: Guo Dean, and Prof: Ma Junjiang Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Beijing 100083 2001Journal of Chinese Pharmaceutical Sciences2001,10,2:1
16Arevision ofChinese pear psyllids (Hemiptera: Psylloidea) associated with Pyrus ussuriensis显示文摘Luo Xinyu Li Fasheng Ma Yanfang Zootaxa0,,:1
17Th1 and Th2 Immune Response in Chronic Hepatitis B Patients during a Long-Term Treatment with Adefovir Dipivoxil显示文摘Yanfang Jiang Zhenhua Ma Guijie Xin Hongqing Yan Wanyu Li Huining Xu Chunhai Hao Junqi Niu Pingwei Zhao Dennis Daniel Taub 2010Mediators of Inflammation2010,,:1
18The molecular tumor burden index as a response evaluation criterion in breast cancer显示文摘Circulating tumor DNA(ctDNA)is a potential biomarker of prognosis and therapeutic response.We conducted this study to explore the role of the molecular tumor burden index(mTBI)in ctDNA as a therapeutic response and prognostic biomarker in a larger cohort prospective phase III randomized multicenter study.We collected 291 plasma samples from 125 metastatic breast cancer patients from the CAMELLIA study(NCT01917279).Target-capture deep sequencing of 1021 genes was performed to detect somatic variants in ctDNA from the plasma samples.The pretreatment mTBI value was correlated with tumor burden(P=0.025).Patients with high-level pretreatment mTBI had shorter overall survival than patients with low-level pretreatment mTBI,and the median overall survival was 40.9 months and 68.4 months,respectively(P=0.011).Patients with mTBI decrease to less than 0.02%at the first tumor evaluation had longer progression-free survival and overall survival(P<0.001 and P=0.007,respectively).The mTBI has good sensitivity to identify complete response/partial response and progressive disease based on computed tomography scans(88.5%and 87.5%,respectively).The patients classified as molecular responders had longer progression-free survival and overall survival than the nonmolecular responders in the overall cohort(P<0.001 and P=0.036,respectively),as well as in the cohort in which computed tomography scans were defined as representing stable disease(P=0.027 and P=0.015,respectively).The mTBI in ctDNA detected in liquid biopsies is a potential biomarker of therapeutic response and prognosis in patients with metastatic breast cancer.Zongbi Yi Fei Ma Guohua Rong Binliang Liu Yanfang Guan Jin Li Xiaoying Sun Wenna Wang Xiuwen Guan Hongnan Mo Jiani Wang Haili Qian Binghe Xu 2021Signal Transduction and Targeted Therapy2021,6,8:1
19Synthesis and Antitumor Activities of Novel 4-Morpholinothieno [3,2-d]pyrimidine Derivatives显示文摘SONG Kaizhen MA Junjie WANG Xiao GONG Ping ZHAO Yanfang 2014Chemical Research in Chinese Universities2014,30,1:0
20Circulating endothelial microvesicles and their carried miR-125a 5p:potential biomarkers for ischaemic stroke显示文摘Background Endothelial microvesicles(EMVs)are closely associated with the status of endothelial cells(ECs).Our earlier study has shown that EMVs could exert protective roles in ECs by transferring their carried miR-125a 5p.However,whether circulating EMVs and their carried miR-125a 5p can be used as biomarkers in ischaemic stroke(IS)are remain unknown.Methods We recruited 72 subjects with IS,60 subjects with high stroke risk and 56 age-matched controls.The circulating EMVs and their carried miR-125a 5p(EMV-miR 125a 5p)levels were detected.We used microRNA(miR)array to study expression changes of miRs in plasma EMVs samples of three IS patients and three matched healthy controls.Transient middle cerebral artery occlusion(tMCAO)was used to establish IS mouse model.Results EMVs level was obviously elevated in IS patients,with the highest level in acute stage,and was positively related to carotid plaque,carotid intima-media thickness(IMT),National Institutes of Health Stroke Scale(NIHSS),infarct volume.On the contrary,we observed that EMV-miR 125a 5p level was obviously reduced in IS,with the lowest level in acute stage,and was negatively correlated with carotid plaque,IMT,NIHSS scores,infarct volume.EMVs and EMV-miR 125a 5p levels were closely related with large artery atherosclerosis subgroup.Importantly,EMVs and EMV-miR 125a 5p levels could serve as independent risk factors,and receiver operating characteristic curve achieved an area under curve(AUC)of 0.720 and 0.832 for IS,respectively,and elevated to 0.881 after their combination.In IS mouse model,control EMVs or n-EMVs administration could decrease the infarct volume and neurological deficit score,while increase the cerebral blood flow of IS mice compared with vehicle group,while IS EMVs or oxygen and glucose deprivation(OGD)-EMVs administration aggravated the tMCAO induced ischaemic injury.In addition,we observed that OGD EMVmiR-125a 5p could partially ameliorate the OGD EMVs induced brain injury after IS.Conclusions These findings demonstrate that circulating EMVs and EMV-miR 125a 5p are closely related with the occurrence,progress,subtypes and severity of IS,and they can serve as innovative biomarkers and therapeutic targets for IS,especially when they are combined.Xiaotang Ma Xiaorong Liao Jiehong Liu Yan Wang Xiang Wang Yanfang Chen Xiaojian Yin Qunwen Pan 2023Stroke & Vascular Neurology2023,8,2:0
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