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Heterocyclic Molecules Tethered branched Polymers with Innate Immune Stimulating Activity

CCS Chemistry 2024年第5期6卷 1278-1288页

作者： Jiayu Zhao Liping Liu Yibo Wang Zichao Huang Yu Zhang Ruirui Qiao Thomas P.Davis Zhaohui Tang Wantong Song Xuesi Chen Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026 Laboratory of Chemical Biology Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 Jilin Biomedical Polymers Engineering Laboratory Changchun 130022 Australian Institute of Bioengineering and Nanotechnology The University of QueenslandBrisbaneQueensland 4072

We report herein an interesting finding that heterocyclic molecules tethered branched polymers exhibit innate immune stimulating *** we conjugated a series of five-,six-,or seven-membered heterocyclic molecules to branched polyethylenimine(bPEI),over 70%of them could induce the secretion of interferon-β(IFN-β)from murine dendritic and human leukemia monocytic(DC2.4 and THP-1)cells through activating the stimulator of interferon genes(STING)*** further proved that this kind of innate stimulating activity was dependent on the macromolecular architecture as heterocyclic molecules tethered linear PEI(lPEI)or dendritic polyamidoamine(PAMAM)induced no or much less IFN-β***,we prepared a series of poly-L-lysine(PLL)-derivatives with different branches to tether with heterocyclic molecules and proved that this kind of bPEI-like structure was important in en hancing the binding affinity with STING proteins and for exhibiting innate stimulating activity.

关键词： bioactive materials polymers heterocycles branched structure immunity

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Architecting Branch structure in Terpolymer of CO_(2),Propylene Oxide and Phthalic Anhydride:An Enhancement in Thermal and Mechanical Performances

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Chinese Journal of Polymer Science 2022年第5期40卷 462-468页

作者： Wen-Jing Wang Shu-Xian Ye Jia-Xin Liang Cong-Xiao Fan Yong-Lan Zhu Shuan-Jin Wang Min Xiao Yue-Zhong Meng The key laboratory of Low-carbon Chemistry&Energy Conservation of Guangdong Province State Key Laboratory of Optoelectronic Materials and TechnologiesSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China

Poly(propylene carbonate phthalate)(PPC-P)is a chemically modified poly(propylene carbonate)(PPC)biodegradable thermoplastic by introducing phthalic anhydride(PA)as the third monomer into the copolymerization of propylene oxide(PO)and CO_(2).To enhance the thermal and mechanical properties of PPC-P,a branching agent pyromellitic anhydride(PMDA)was introduced into the terpolymerization of PO,PA and CO_(2).The resulting copolymers with branched structure,named branched PPC-P,can be obtained using metal-free Lewis pair consisting of triethyl borane(TEB)and bis(triphenylphosphine)iminium chloride(PPNCl)as *** products obtained were analyzed by NMR spectroscopy and their thermal,mechanical properties and melt processability were evaluated by DSC,TGA,tensile test and melt flow index(MFI)*** obtained branched PPC-P has a high molecular weight up to 156.0 kg·mol^(-1).It shows an increased glass transition temperature(Tg)higher than 50℃and an enhanced tensile strength as high as 38.9 ***,the MFI value decreases obviously,indicative of an improved melt strength arising from the branched structure and high molecular *** is more,the branched PPC-P exhibits reasonable biodegradability,which demonstrates the great potential as a new green thermoplastic for the family of biodegradable plastics.

关键词： CO_(2)utilization Pyromellitic anhydride Biodegradability branched structure Melt flow index

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