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3篇 您的检索式:作者名="Chengfeng Pei"
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1Distribution of airborne SARS-CoV-2 and possible aerosol transmission in Wuhan hospitals, China显示文摘The novel severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has caused an outbreak of CO V ID-19(2019 coronavirus infectious disease)that has led to a global public health crisis.The spread of SARS-CoV-2 can be rapid;but there is still considerable controversy about its main route of transmission[l,2];that is,whether transmission is by contact or through the air[2,3].Recently the W H O(World Health Organization)released a document that recognized the possibility of aerosol transmission of SARS-CoV-2 for indoor environments and enclosed spaces[4].The purpose of the present study was to evaluate the airborne transmission of SARS-CoV-2 through a field investigation of its occurrence in the air and other samples collected from health facilities in W uhan;China.Jia Hu Chengfeng Lei Zhen Chen Weihua Liu Xujuan Hu Rongjuan Pei Zhengyuan Su Fei Deng Yu Huang Xiulian Sun Junji Cao Wuxiang Guan 2020National Science Review2020,7,12:4
2A Glycal Approach to the Synthesis of Pregnane Glycoside P57显示文摘Pregnane glycoside P57 is known as an active component of Hoodia gordonii, which has long been used as a diet with appetite suppressantproperty. Chemical synthesis of P57 demands installation of β-cymarosyl linkage onto the steroid aglycone. The stereoselective formation of this specia1 2-deoxy-β-glycosidic linkage has previously been proven to be difficult and thus a limiting step in the synthesis of P57 and its congeners. Herein, we reportthe glycosylation reactions with glycals as donors and TPHB (triphenylphosphine hydrobromide) as promoter and a convergent synthesis of P57 via a β-selective glycosylation with a trisaccharide glycal donor.Chao Liu Yuyong Ma Chengfeng Pei Wei Li Biao Yu 2018Chinese Journal of Chemistry2018,36,11:3
3A redox-responsive self-assembling COA-4-arm PEG prodrug nanosystem for dual drug delivery suppresses cancer metastasis and drug resistance by downregulating hsp90 expression显示文摘Metastasis and resistance are main causes to affect the outcome of the current anticancer therapies.Heat shock protein 90(Hsp90)as an ATP-dependent molecular chaperone takes important role in the tumor metastasis and resistance.Targeting Hsp90 and downregulating its expression show promising in inhibiting tumor metastasis and resistance.In this study,a redox-responsive dual-drug nanocarrier was constructed for the effective delivery of a commonly used chemotherapeutic drug PTX,and a COAmodified 4-arm PEG polymer(4PSC)was synthesized.COA,an active component in oleanolic acid that exerts strong antitumor activity by downregulating Hsp90 expression,was used as a structural and functional element to endow 4PSC with redox responsiveness and Hsp90 inhibitory activity.Our results showed that 4PSC/PTX nanomicelles efficiently delivered PTX and COA to tumor locations without inducing systemic toxicity.By blocking the Hsp90 signaling pathway,4PSC significantly enhanced the antitumor effect of PTX,inhibiting tumor proliferation and invasiveness as well as chemotherapy-induced resistance in vitro.Remarkable results were further confirmed in vivo with two preclinical tumor models.These findings demonstrate that the COA-modified 4PSC drug delivery nanosystem provides a potential platform for enhancing the efficacy of chemotherapies.Yi Zhou Yingling Miao Qiudi Huang Wenwen Shi Jiacui Xie Jiachang Lin Pei Huang Chengfeng Yue Yuan Qin Xiyong Yu He Wang Linghao Qin Jianhai Chen 2023Acta Pharmaceutica Sinica B2023,13,7:0
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