Comparative Proteomic Analysis Reveals Antibacterial Mechanism of Patrinia scabiosaefolia Against Methicillin Resistant Staphylococcus epidermidis

Abstract

Xin Liu,1 Lili An,2 Shuaijun Ren,2 Yonghui Zhou,1 Wei Peng1 1College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, 550025, People’s Republic of China; 2Dermatology Department, The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, 550025, People’s Republic of ChinaCorrespondence: Xin Liu, College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, 550025, People’s Republic of China, Tel [phone], Email [email protected]: As a kind of opportunist pathogen, Staphylococcus epidermidis (MRSE) can cause nosocomial infections and easily evolve into resistant bacteria. Among these, methicillin-resistant Staphylococcus epidermidis (MRSE) exhibit significantly higher rates. Our previous study showed that Patrinia scabiosaefolia (PS) possessed strong antibacterial activity against MRSE. However, the mechanism of PS against MRSE is not clear.Methods: Here, a tandem mass tag-based (TMT) proteomic analysis was performed to elucidate the potential mechanism of PS against MRSE. We compared the differential expression proteins of MRSE under PS stress.Results: Based on a fold change of > 1.2 or < 1/1.2 (with p value set at < 0.05), a total of 248 proteins (128 up-regulated proteins, 120 down-regulated proteins) were identified. Bioinformatic analysis showed that proteins including arginine deiminase (arcA), ornithine carbamoyltransferase (arcB) and carbamate kinase (arcC), serine–tRNA ligase (serS), phenylalanine–tRNA ligase beta and subunit (pheT), DltD (dlt), d-alanyl carrier protein (dlt), accumulation-associated protein (SasG), serine-aspartate repeat-containing protein C (SdrC) and hemin transport system permease protein HrtB (VraG) played important roles in mechanism of PS against MRSE.Conclusion: In summary, these results indicated that arginine deiminase pathway (ADI) pathway, protein synthesis, cell wall synthesis, biofilm formation and uptake of iron were related to mechanisms of PS against MRSE. Our findings provide an insight into the the mechanism of PS against MRSE, and may be valuable in offering new targets to develop more anti-MRSE drugs.Keywords: methicillin-resistant Staphylococcus epidermidis, Patrinia scabiosaefolia, proteomic

Keywords

• methicillin-resistant staphylococcus epidermidis
• patrinia scabiosaefolia
• proteomic;