Medical device related infections caused by bacteria are common complications in clinical practice,and preventing bacterial colonization on the surface of medical materials is one of the important challenges in the medical field.Therefore,there is an urgent need to construct medical coatings that combine antibacterial properties and biocompatibility.In this study,a γ-polyglutamic acid(γ-PGA)complex with long-chain alkyl quaternary ammonium salts formed by electrostatic and hydrophobic interactions was prepared,which was insoluble in water but soluble in organic solvents(e.g.,ethanol),and was capable of constructing antimicrobial coatings on the surfaces of medical materials in a simple and efficient manner.The bactericidal effect of the coating was verified using viable bacteria counting experiments,and the results showed that the bactericidal rate of the coated thermoplastic polyurethane(TPU)membrane against Staphylococcus aureus was greater than 99.9%compared with that of the uncoated TPU membrane.In addition,a cytotoxicity assay was performed using the L929 fibroblast and cell proliferation detection kit(CCK-8),which showed that the survival rate of L929 fibroblasts on coated TPU was greater than 90%.Meanwhile,the hemolysis rate of coated erythrocytes was tested using fresh rabbit red blood cells(RBCs),and the hemolysis rate on the coated TPU surface was 1.5%.The above results indicated that the coating had good biocompatibility.The preparation method of medical antibacterial coating reported in this study provided a new idea for preventing bacterial infections related to implantable/interventional medical devices.

AIM: To prepare radix scutellariae microemulsion gel and investigate its therapeutic effect on chronic eczema based on the previous research of radix scutellariae self microemulsion. METHODS: The gel matrix and humectant were optimized by single factor method and response surface method to obtain the formula and preparation technique of the gel. The Franz diffusion cell method was used to evaluate the transdermal properties of microemulsion and microemulsion gel in vitro. By establishing a chronic eczema model in the mouse ear, the swelling degree, swelling inhibition rate, pathological changes and tumor necrosis factor α (TNF-α), Interleukin-1β (IL-1β) and interleukin - 6 (IL-6) of radix scutellariae microemulsion gel were measured, to investigate the therapeutic effect on chronic eczema in mice. RESULTS: The physical and chemical properties of radix scutellariae microemulsion gel were stable. Compared with microemulsion, the microemulsion gel had better transdermal performance. The cumulative transdermal amount of baicalein and wogonin, the main components of microemulsion gel, was 1.85 times and 2.77 times of that of microemulsion respectively. Moreover, the steady flow rate and permeability coefficient of microemulsion gel significantly increased, and the lag time significantly shortened. Pharmacodynamic study showed that compared with the model group, the radix scutellariae microemulsion gel could significantly reduce the ear swelling of mice (P<0.05), and the serum inflammatory factor TNF - α, IL-1β and IL-6 reduced content by over 37%. Compared with the radix scutellaria aqueous extract and aqueous extract gel, the treatment of chronic eczema was better. CONCLUSION: The preparation process of radix scutellaria microemulsion gel is feasible, with strong transdermal property, and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.

AIM:To prepare radix scutellariae mi-croemulsion gel and investigate its therapeutic ef-fect on chronic eczema based on the previous re-search of radix scutellariae self microemulsion.METHODS:The gel matrix and humectant were op-timized by single factor method and response sur-face method to obtain the formula and preparation technique of the gel.The Franz diffusion cell meth-od was used to evaluate the transdermal proper-ties of microemulsion and microemulsion gel in vi-tro.By establishing a chronic eczema model in the mouse ear,the swelling degree,swelling inhibition rate,pathological changes and tumor necrosis fac-tor a(TNF-a),Interleukin-1β(IL-1β)and interleukin-6(IL-6)of radix scutellariae microemulsion gel were measured,to investigate the therapeutic ef-fect on chronic eczema in mice.RESULTS:The physi-cal and chemical properties of radix scutellariae mi-croemulsion gel were stable.Compared with micro-emulsion,the microemulsion gel had better trans-dermal performance.The cumulative transdermal amount of baicalein and wogonin,the main compo-nents of microemulsion gel,was 1.85 times and 2.77 times of that of microemulsion respectively.Moreover,the steady flow rate and permeability co-efficient of microemulsion gel significantly in-creased,and the lag time significantly shortened.Pharmacodynamic study showed that compared with the model group,the radix scutellariae micro-emulsion gel could significantly reduce the ear swelling of mice(P＜0.05),and the serum inflamma-tory factor TNF-a,IL-1β and IL-6 reduced content by over 37％.Compared with the radix scutellaria aqueous extract and aqueous extract gel,the treat-ment of chronic eczema was better.CONCLUSION:The preparation process of radix scutellaria micro-emulsion gel is feasible,with strong transdermal property,and a significant therapeutic effect on chronic eczema.