Journal of Microbiology

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Exploring the Therapeutic Potential of Scorpion‑Derived Css54 Peptide Against Candida albicans: Jonggwan Park , Hyeongsun Kim , Da Dam Kang , Yoonkyung Park; J. Microbiol. 2024;62(2):101-112. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00113-4

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Candida albicans (C. albicans) is one of the most common opportunistic fungi worldwide, which is associated with a high mortality rate. Despite treatment, C. albicans remains the leading cause of life-threatening invasive infections. Consequently, antimicrobial peptides (AMPs) are potential alternatives as antifungal agents with excellent antifungal activity. We previously reported that Css54, found in the venom of Centrurodies suffusus suffusus (C. s. suffusus) showed antibacterial activity against zoonotic bacteria. However, the antifungal activity of Css54 has not yet been elucidated. The obj!ective of this study was to identify the antifungal activity of Css54 against C. albicans and analyze its mechanism. Css54 showed high antifungal activity against C. albicans. Css54 also inhibited biofilm formation in fluconazole-resistant fungi. The antifungal mechanism of action of Css54 was investigated using membrane-related assays, including the membrane depolarization assay and analysis of the membrane integrity of C. albicans after treatment with Css54. Css54 induced reactive oxygen species (ROS) production in C. albicans, which affected its antifungal activity. Our results indicate that Css54 causes membrane damage in C. albicans, highlighting its value as a potential therapeutic agent against C. albicans infection.

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Antimicrobial Potential of Scorpion-Venom-Derived Peptides
Zhiqiang Xia, Lixia Xie, Bing Li, Xiangyun Lv, Hongzhou Zhang, Zhijian Cao
Molecules.2024; 29(21): 5080. CrossRef
Synthetic Short Cryptic Antimicrobial Peptides as Templates for the Development of Novel Biotherapeutics Against WHO Priority Pathogen
Manjul Lata, Vrushti Telang, Pooja Gupta, Garima Pant, Mitra Kalyan, Jesu Arockiaraj, Mukesh Pasupuleti
International Journal of Peptide Research and Therapeutics.2024;[Epub] CrossRef

[Protocol] Detecting Salmonella Type II flagella production by transmission electron microscopy and immunocytochemistry: Yoontak Han , Eun-Jin Lee; J. Microbiol. 2020;58(4):245-251. Published online November 23, 2019; DOI: https://doi.org/10.1007/s12275-020-9297-y

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Abstract

The bacterial flagellum is an appendage structure that provides a means for motility to promote survival in fluctuating environments. For the intracellular pathogen Salmonella enterica serovar Typhimurium to survive within macrophages, flagellar gene expression must be tightly regulated, and thus, is controlled at multiple levels, including DNA recombination, transcription, post-transcription, protein synthesis, and assembly within host cells. To understand the contribution of flagella to Salmonella pathogenesis within the host, it is critical to detect flagella production within macrophages via microscopy. In this paper, we describe two methods for detecting bacterial flagella by microscopy both in vitro and in vivo infection models.

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