Synthetic polymer hydrogel nanoparticles(NPs)were developed to function as abiotic affinity reagents for fibrinogen.These NPs were made using both temperature-sensitive N-isopropyl acrylamide(NIPAm)and L-amino acid monomers.Five kinds of L-amino acids were acryloylated to obtain functional mono-mers:L-phenylalanine(Phe)and L-leucine(Leu)with hydrophobic side chains,L-glutamic acid(Glu)with negative charges,and L-lysine(Lys)and L-arginine(Arg)with positive charges.After incubating the NPs with fibrinogen,y-globulin,and human serum albumin(HSA)respectively,the NPs that incorporated N-acryloyl-Arg monomers(AArg@NPs)showed the strongest and most specific binding affinity to fibrin-ogen,when compared with y-globulin and HSA.Additionally,the fibrinogen-AArg binding model had the best docking scores,and this may be due to the interaction of positively charged AArg@NPs and the negatively charged fibrinogen D domain and the hydrophobic interaction between them.The specific adsorption of AArg@NPs to fibrinogen was also confirmed by the immunoprecipitation assay,as the AArg@NPs selectively trapped the fibrinogen from a human plasma protein mixture.AArg@NPs had a strong selectivity for,and specificity to,fibrinogen and may be developed as a potential human fibrinogen-specific affinity reagent.

Economic development drives the increase of endogenous demand,and Internet medicine integrates regional medical resources,expanding the fairness of the public's access to medical and health services.However,it is also accompanied an ethical crisis with the development of technology,which requires continuous standardization and practice.Starting from the principle of medical fairness,this paper sorted out the main advantaged characteristics of the development of Internet medicine from the aspects of data fairness,cost equity,opportunity equity,and educational equity.The existing ethical problems of Internet medicine were explored including unfair protection of ethical review mechanisms,unfair data collection of scientific and technological subjects,unfair distribution of benefits and risks,and unfair utilization of Internet medical resources.It also proposed the governance paths of compacting the subject responsibility,perfecting review and supervision,improving the sharing mechanism,bridging the digital divide,strengthening risk prevention,protecting the citizens'rights and interests,strengthening education and guidance,and increasing grassroots investment.