The antimicrobial peptide LL-37 belongs to the cathelicidin family and is one of the few human bactericidal peptides with potent antistaphylococcal activity. Staphylococcus aureus is one of the main infection bacteria in orthopedic implant therapy. Biofilm formation after bacterial infection brings more and more severe test for clinical antiinfection treatment.However, there are few studies on LL-37 in S. aureus infection of prosthesis. In this work, addition to research the antibacterial activity and the inhibitory effect on bacterial adhesion of LL-37, an in vitro model of S. aureus biofilm formation on titanium alloy surface was established to observe the inhibitory effect of LL-37.The results showed that LL-37 has a strong antibacterial effect on S. aureus in vitro, and the minimum inhibitory concentration (MIC) is about 0.62 μΜ. Moreover, LL-37 has significant impact on the adhesion of S. aureus when the concentration ≥0.16 μM and significant anti-staphylococcal biofilm effects on static biofilm models at the concentration of 0.31 to 10 μM. Additionally, LL-37 at 5 μM had a significant destructive effect on S. aureus biofilm (P < .05) that formed on the titanium alloy surface.This study further confirmed the role of LL-37 in the process of S. aureus infection, including antimicrobial activities, inhibition of bacterial adhesion, and inhibition of mature biofilm. LL-37 can significantly destroy the stable biofilm structure on the titanium alloy surface in vitro, which may provide a new way for refractory infection caused by S. aureus in titanium alloy prosthesis infection.
As a new stage in the development of medicine and health, smart medicine has attracted attention from all parties in recent years. Especially, under the impetus of the Internet, due to the development of new technologies, smart medical care has made considerable progress, and it has also brought us new challenges. The concept, hypothesis, and design of intelligent medical care are analyzed, and the design objects and design principles of intelligent medical care are highlighted. In Africa, 79 patients with shoulder pain after stroke and hemiplegia in the recession period were disintegrated and divided into observation group (40 people) and control group (39 people). The observation group and the control group used two different treatment methods, acupuncture treatment and traditional western medicine treatment. Finally, the situation of the two groups is checked. From the results, the treatment effect of the control group was not as good as that of the observation group ( P < 0.05 ). After treatment, the effects of capillary disease and patients’ living conditions in the observation group were better than those in the control group ( P < 0.05 ). It is concluded that the therapeutic effect of wisdom acupuncture treatment has a certain effect and can be used in medical treatment.
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