Melimine-Modified 3D-Printed Polycaprolactone Scaffolds for the Prevention of Biofilm-Related Biomaterial Infections

被引：25

作者：

Cometta, Silvia ^{[1
,2
,3
]}

Jones, Robert T. ^{[4
,5
]}

Juarez-Saldivar, Alfredo ^{[6
]}

Donose, Bogdan C. ^{[7
]}

Yasir, Muhammad ^{[8
]}

Bock, Nathalie ^{[3
,9
]}

Dargaville, Tim R. ^{[5
]}

Bertling, Karl ^{[7
]}

Bruenig, Michael ^{[7
]}

Rakic, Aleksandar D. ^{[7
]}

Willcox, Mark ^{[8
]}

Hutmacher, Dietmar W. ^{[1
,2
,3
,10
,11
]}

机构：

[1] Queensland Univ Technol, Fac Engn, Sch Mech Med & Proc Engn, Brisbane, Qld 4000, Australia

[2] Queensland Univ Technol, Max Planck Queensland Ctr, Brisbane, Qld 4000, Australia

[3] Queensland Univ Technol, Training Ctr Multiscale 3D Imaging Modelling & Mf, Australian Res Council, Kelvin Grove, Qld 4059, Australia

[4] Queensland Univ Technol, Cent Analyt Res Facil CARF, Brisbane, Qld 4000, Australia

[5] Queensland Univ Technol, Ctr Mat Sci, Sch Chem & Phys, Brisbane, Qld 4000, Australia

[6] Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Reynosa 88740, Mexico

[7] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia

[8] Univ New South Wales, Sch Optometry & Vis Sci, Sydney, NSW 2033, Australia

[9] Queensland Univ Technol, Fac Hlth, Sch Biomed Sci, Brisbane, Qld 4000, Australia

[10] Queensland Univ Technol, Ind Transformat Training Ctr Addit Biomfg, Australian Res Council, Brisbane, Qld 4059, Australia

[11] Queensland Univ Technol, Training Ctr Cell & Tissue Engn Technol, Australian Res Council, Brisbane, Qld 4059, Australia

来源：

ACS NANO | 2022年 / 16卷 / 10期

关键词：

bacterial infection; antimicrobial peptide; polycaprolactone; 3D printing; scaffold; melimine; PEPTIDE MELIMINE; SURFACES; TISSUE; XPS;

D O I：

10.1021/acsnano.2c05812

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Biomaterial-associated infections are one of the major causes of implant failure. These infections result from persistent bacteria that have adhered to the biomaterial surface before, during, or after surgery and have formed a biofilm on the implant's surface. It is estimated that 4 to 10% of implant surfaces are contaminated with bacteria; however, the infection rate can be as h i g h as 30% in intensive care units in developed countries and as h i g h as 45% in developing countries. To date, there is no clinical solution to prevent implant infection without relying on the use of high doses of antibiotics supplied systemically and/or removal of the infected device. In this study, melimine, a chimeric cationic peptide that has been tested in Phase I and II human clinical trials, was immobilized onto the surface of 3D-printed medical-grade polycaprolactone (mPCL) scaffolds via covalent binding and adsorption. X-ray photoelectron spectroscopy (XPS) and time-of-fl i g h t secondary ion mass spectrometry (ToF-SIMS) spectra of melimine-treated surfaces confirmed immobilization of the peptide, as wel l as its homogeneous distribution throughout the scaffold surface. Amino acid analysis showed that melimine covalent and noncovalent immobilization resulted in a peptide density of similar to 156 and similar to 533 ng/cm(2) , respectively. Furthermore, we demonstrated that the immobilization of melimine on mPCL scaffolds by 1-ethyl-3-[3-(dimethylamino)propyl] carbodiimide hydrochloride (EDC) coupling and noncovalent interactions resulted in a reduction of Staphylococcus aureus colonization by 78.7% and 76.0%, respectiv e l y , in comparison with the nonmodified control specimens. Particularly, the modified surfaces maintained their antibacterial properties for 3 days, which resulted in the inhibition of biofilm formation in vitro. This system offers a biomaterial strategy to effectively prevent biofilm-related infections on implant surfaces without relying on the use of prophylactic antibiot i c treatment.

引用

页码：16497 / 16512

页数：16

共 51 条

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