Journal of Microbiology

Review

CRISPR-Cas technologies: Emerging tools from research to clinical application: Hana Hyeon, Soonhye Hwang, Yongyang Luo, Eunkyoung Shin, Ji-Hyun Yeom, Hong-Man Kim, Minkyung Ryu, Kangseok Lee; J. Microbiol. 2025;63(8):e2504012. Published online August 31, 2025; DOI: https://doi.org/10.71150/jm.2504012

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Abstract PDF: CRISPR-Cas technologies have emerged as powerful and versatile tools in gene therapy. In addition to the widely used SpCas9 system, alternative platforms including modified amino acid sequences, size-optimized variants, and other Cas enzymes from diverse bacterial species have been developed to apply this technology in various genetic contexts. In addition, base editors and prime editors for precise gene editing, the Cas13 system targeting RNA, and CRISPRa/i systems have enabled diverse and adaptable approaches for genome and RNA editing, as well as for regulating gene expression. Typically, CRISPR-Cas components are transported to the target in the form of DNA, RNA, or ribonucleoprotein complexes using various delivery methods, such as electroporation, adeno-associated viruses, and lipid nanoparticles. To amplify therapeutic efficiency, continued developments in targeted delivery technologies are required, with increased safety and stability of therapeutic biomolecules. CRISPR-based therapeutics hold an inexhaustible potential for the treatment of many diseases, including rare congenital diseases, by making permanent corrections at the genomic DNA level. In this review, we present various CRISPR-based tools, their delivery systems, and clinical progress in the CRISPR-Cas technology, highlighting its innovative prospects for gene therapy.

Journal Article

[Protocol] Development of DNA aptamers specific for small therapeutic peptides using a modified SELEX method: Jaemin Lee , Minkyung Ryu , Dayeong Bae , Hong-Man Kim , Seong-il Eyun , Jeehyeon Bae , Kangseok Lee; J. Microbiol. 2022;60(7):659-667. Published online June 22, 2022; DOI: https://doi.org/10.1007/s12275-022-2235-4

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Aptamers are short single-stranded DNA or RNA oligonucleotides capable of binding with high affinity and specificity to target molecules. Because of their durability and ease of synthesis, aptamers are used in a wide range of biomedical fields, including the diagnosis of diseases and targeted delivery of therapeutic agents. The aptamers were selected using a process called systematic evolution of ligands by exponential enrichment (SELEX), which has been improved for various research purposes since its development in 1990. In this protocol, we describe a modified SELEX method that rapidly produces high aptamer screening yields using two types of magnetic beads. Using this method, we isolated an aptamer that specifically binds to an antimicrobial peptide. We suggest that by conjugating a small therapeutic-specific aptamer to a gold nanoparticle-based delivery system, which enhances the stability and intracellular delivery of peptides, aptamers selected by our method can be used for the development of therapeutic agents utilizing small therapeutic peptides.

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Review

Rediscovery of antimicrobial peptides as therapeutic agents: Minkyung Ryu , Jaeyeong Park , Ji-Hyun Yeom , Minju Joo , Kangseok Lee; J. Microbiol. 2021;59(2):113-123. Published online February 1, 2021; DOI: https://doi.org/10.1007/s12275-021-0649-z

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Abstract

In recent years, the occurrence of antibiotic-resistant pathogens is increasing rapidly. There is growing concern as the development of antibiotics is slower than the increase in the resistance of pathogenic bacteria. Antimicrobial peptides (AMPs) are promising alternatives to antibiotics. Despite their name, which implies their antimicrobial activity, AMPs have recently been rediscovered as compounds having antifungal, antiviral, anticancer, antioxidant, and insecticidal effects. Moreover, many AMPs are relatively safe from toxic side effects and the generation of resistant microorganisms due to their target specificity and complexity of the mechanisms underlying their action. In this review, we summarize the history, classification, and mechanisms of action of AMPs, and provide descriptions of AMPs undergoing clinical trials. We also discuss the obstacles associated with the development of AMPs as therapeutic agents and recent strategies formulated to circumvent these obstacles.

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