Synthetic polypeptides,also known as poly(α-amino acid)s(PαAAs),are biomimetic and biodegradable polymers holding great potential for a variety of biomedical applications.Possessing the same peptide bonds as natural...Synthetic polypeptides,also known as poly(α-amino acid)s(PαAAs),are biomimetic and biodegradable polymers holding great potential for a variety of biomedical applications.Possessing the same peptide bonds as natural proteins,polypeptides can also adopt typical well-defined secondary structures includingα-helix,which have been shown to significantly impact the physicochemical properties and biological outcomes of materials.In this feature article,we review the state-of-the-art progresses ofα-helical polypeptides for biomedical applications,with a special emphasis on the manipulation of helix-to-coil dynamic transition,conformation-associated anti-biofouling coatings,cellular uptake regulation,and reducing immunogenicity of polypeptide-protein conjugates.Finally,perspectives on outstanding challenges remained in this field and some important future directions are discussed.展开更多
Nanocarriers play an important role in drug delivery for disease treatment.However,nanocarriers face a series of physiological barriers after administration such as blood clearance,nonspecific tissue/cell localization...Nanocarriers play an important role in drug delivery for disease treatment.However,nanocarriers face a series of physiological barriers after administration such as blood clearance,nonspecific tissue/cell localization,poor cellular uptake,and endosome trapping.These physiological barriers seriously reduce the accumulation of drugs in target action site,which results in poor therapeutic efficiency.Although polyethylene glycol(PEG)can increase the blood circulation time of nanocarriers,its application is limited due to the“PEG dilemma”.Zwitterionic polymers have been emerging as an appealing alternative to PEG owing to their excellent performance in resisting nonspecific protein adsorption.Importantly,the diverse structures bring functional versatility to zwitterionic polymers beyond nonfouling.This review focuses on the structures and characters of zwitterionic polymers,and will discuss and summarize the application of zwitterionic polymers for drug delivery.We will highlight the strategies of zwitterionic polymers to address the physiological barriers during drug delivery.Finally,we will give some suggestions that can be utilized for the development of zwitterionic polymers for drug delivery.This review will also provide an outlook for this field.Our aim is to provide a comprehensive and systemic review on the application of zwitterionic polymers for drug delivery and promote the development of zwitterionic polymers.展开更多
基金financially supported by the National Key Research and Development Program of China (No. 2019YFA0904203)the National Natural Science Fund for Distinguished Young Scholars (No. 22125101)
文摘Synthetic polypeptides,also known as poly(α-amino acid)s(PαAAs),are biomimetic and biodegradable polymers holding great potential for a variety of biomedical applications.Possessing the same peptide bonds as natural proteins,polypeptides can also adopt typical well-defined secondary structures includingα-helix,which have been shown to significantly impact the physicochemical properties and biological outcomes of materials.In this feature article,we review the state-of-the-art progresses ofα-helical polypeptides for biomedical applications,with a special emphasis on the manipulation of helix-to-coil dynamic transition,conformation-associated anti-biofouling coatings,cellular uptake regulation,and reducing immunogenicity of polypeptide-protein conjugates.Finally,perspectives on outstanding challenges remained in this field and some important future directions are discussed.
基金financially supported by the Fundamental Research Funds for the Central Universities(No.06500230)the National Natural Science Foundation of China(No.32071391)the Beijing Nova Program(No.Z201100006820140).
文摘Nanocarriers play an important role in drug delivery for disease treatment.However,nanocarriers face a series of physiological barriers after administration such as blood clearance,nonspecific tissue/cell localization,poor cellular uptake,and endosome trapping.These physiological barriers seriously reduce the accumulation of drugs in target action site,which results in poor therapeutic efficiency.Although polyethylene glycol(PEG)can increase the blood circulation time of nanocarriers,its application is limited due to the“PEG dilemma”.Zwitterionic polymers have been emerging as an appealing alternative to PEG owing to their excellent performance in resisting nonspecific protein adsorption.Importantly,the diverse structures bring functional versatility to zwitterionic polymers beyond nonfouling.This review focuses on the structures and characters of zwitterionic polymers,and will discuss and summarize the application of zwitterionic polymers for drug delivery.We will highlight the strategies of zwitterionic polymers to address the physiological barriers during drug delivery.Finally,we will give some suggestions that can be utilized for the development of zwitterionic polymers for drug delivery.This review will also provide an outlook for this field.Our aim is to provide a comprehensive and systemic review on the application of zwitterionic polymers for drug delivery and promote the development of zwitterionic polymers.
