Article
Biochemistry & Molecular Biology
Mark Hutchins, Richard A. Bovill, Peter J. Stephens, John A. Brazier, Helen M. I. Osborn
Summary: The increasing number of antibiotic-resistant bacteria poses a serious threat to global human health. This study examines the glycosylation of nadifloxacin to improve its solubility and finds that one glycoside derivative has the potential to be an effective antibacterial agent.
Article
Infectious Diseases
Cheng-En Tsai, Chia-Jui Yang, Yu-Chung Chuang, Jann-Tay Wang, Wang-Huei Sheng, Yee-Chun Chen, Shan-Chwen Chang
Summary: This study aimed to determine the synergistic effects of combining CPT with DAP, VAN, or LNZ against different MRSA strains. The results showed that the CPT-DAP combination exhibited significant synergistic bactericidal effects, while the CPT-VAN and CPT-LNZ combinations did not show synergistic activity. Therefore, DAP may be a better choice for combination therapy with CPT in the treatment of MRSA infections.
INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES
(2022)
Article
Microbiology
Amar Deep Sharma, William G. Gutheil
Summary: New strategies are urgently needed to address antimicrobial resistance. Synergistic agent combinations provide a potential approach to combating this problem. In this study, a screening of an FDA-approved drug library identified several beta-lactam antibiotics with synergistic effects with ceftobiprole.
MICROBIOLOGY SPECTRUM
(2023)
Article
Immunology
Ning Yin, Xin Yang, Li Wang, Chi Zhang, Jiyu Guan, Ye Tao, Xuerui Guo, Yicheng Zhao, Wu Song, Bingmei Wang, Yong Tang
Summary: Kaempferol was found to downregulate the expression of the staphylococcal virulence factor Hla, thereby providing protection against MRSA-induced pneumonia in mice.
MICROBIAL PATHOGENESIS
(2022)
Article
Chemistry, Medicinal
Dingyi Shen, Songpo Duan, Yuhan Hu, Jintong Liang, Youzhi Tang
Summary: This study found that the phloroglucinol derivative TPG and 2-nitrophloroglucinol exhibited potent synergistic antibacterial activity with penicillin or bacitracin against MRSA. The combination disrupted the MRSA cell membrane and inhibited the expression of related proteins, effectively inhibiting MRSA growth.
PHYTOTHERAPY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Jun Wang, Xinxin Ma, Jing Li, Lu Shi, Lijuan Liu, Xinyao Hou, Sijin Jiang, Pu Li, Jia Lv, Lei Han, Yue Cheng, Bei Han
Summary: It is imperative to explore alternative antimicrobial treatments for methicillin-resistant Staphylococcus aureus (MRSA) infections. This study found that a combination of Nisin (NIS) and Oxacillin (OX) can effectively inhibit MRSA and potentially restore its sensitivity to OX by inhibiting the transcription of mecA gene. This research has important clinical implications for developing new anti-MRSA biomaterials.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Acoustics
Qin Shu, Hanghang Lou, Tianyu Wei, Xinglin Zhang, Qihe Chen
Summary: The synergistic treatment of ultrasound and MEL-A showed remarkable antibacterial effect against MRSA, as evidenced by enumeration of viable microbes.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Infectious Diseases
Minjun Kim, Yena Seo, Seon-Gyeong Kim, Yedam Choi, Hyun Jung Kim, Tae-Jong Kim
Summary: Resistant bacteria pose a critical problem in bacterial infection treatment, and the development of new antibiotics is not the optimal solution. Combining safe, plant-based compounds with conventional antibiotics may be a more reasonable approach to increase efficacy against resistant bacteria. This study investigates the synergistic antibiotic activity of Ricini Semen extract and its constituent fatty acids when mixed with oxacillin, showing that changes in cell membrane fluidity play a major role in this mechanism.
Article
Biochemistry & Molecular Biology
Mohamed Samir, Mohamed Ramadan, Mostafa H. Abdelrahman, Mohammed A. I. Elbastawesy, Hamada Mohamed Halby, Mohamed Abdel-Aziz, Gamal El-Din A. Abuo-Rahma
Summary: A series of ciprofloxacin-uracil conjugates have been synthesized and evaluated for their antibacterial activities. The results showed that the new derivatives exhibited better activity against Gram-positive bacteria, with compounds 5b and 5g showing the highest activity and also demonstrating potent inhibitory activities against MRSA strains. Additionally, these compounds showed good inhibitory activities against DNA gyrase and topoisomerase IV.
BIOORGANIC & MEDICINAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
D. M. I. H. Dissanayake, D. D. B. D. Perera, L. R. Keerthirathna, Saumya Heendeniya, Raymond J. Anderson, David E. Williams, L. Dinithi C. Peiris
Summary: This study investigated the antimicrobial properties of Plumbago indica root bark against bacterial and fungal strains. It identified plumbagin as the active compound and found that it showed significant antimicrobial activity against methicillin-resistant Staphylococcus aureus.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2022)
Review
Materials Science, Multidisciplinary
Shreya Kanth, Akshatha Nagaraja, Yashoda Malgar Puttaiahgowda
Summary: The current global death rate is threatened by deadly unknown infections and the emergence of multidrug-resistant bacteria. Combatting drug-resistant bacteria, such as MRSA, has become a daunting challenge globally, with polymer synthesis being explored as a significant approach in preventing the spread of infections.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Cell Biology
Zhimin Bai, Min Chen, Qiaofa Lin, Ying Ye, Hongmei Fan, Kaizhen Wen, Jianxing Zeng, Donghong Huang, Wenfei Mo, Ying Lei, Zhijun Liao
Summary: By extracting feature vectors from protein sequences and using classification tools, MRSA and MSSA were successfully distinguished. MRSA showed high resistance to penicillin and high pathogenic risk. Cross-infection between different types of MRSA was found in Quanzhou, and MRSA in traditional hospitals exhibited increasingly blurred molecular characteristics.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2021)
Review
Infectious Diseases
Joshua. B. Parsons, Annette. C. Westgeest, Brian. P. B. Conlon, Vance. G. Fowler
Summary: Methicillin-resistant Staphylococcus aureus (MRSA) is a deadly pathogen that can persist in the bloodstream for days despite appropriate antibiotics. Persistent MRSA bacteremia is common and associated with poor clinical outcomes. This review explores the factors related to host-pathogen interaction and discusses the clinical relevance of each element. Treatment options and diagnostic approaches for managing persistent MRSA bacteremia are also discussed.
Article
Public, Environmental & Occupational Health
Feiteng Zhu, Hemu Zhuang, Shujuan Ji, Er Xu, Lingfang Di, Zhengan Wang, Shengnan Jiang, Haiping Wang, Lu Sun, Ping Shen, Yunsong Yu, Yan Chen
Summary: The study found that in households of CA-MRSA infected patients in China, most MRSA isolates belonged to epidemic CA-MRSA clones, while no MRSA was detected in the control group households. The research revealed that the home environment is an important reservoir for MRSA.
FRONTIERS IN PUBLIC HEALTH
(2021)
Article
Microbiology
Melissa J. Karau, Suzannah M. Schmidt-Malan, Scott A. Cunningham, Jayawant N. Mandrekar, Bobbi S. Pritt, Tiffany R. Keepers, Alisa W. Serio, Surya Chitra, Robin Patel
Summary: Omadacycline, vancomycin, and rifampin, as well as rifampin combination therapies, were evaluated in an experimental rat model of MRSA osteomyelitis. The results showed that rifampin combination therapy was effective in reducing MRSA recovery without developing resistance. The combination of omadacycline and rifampin yielded negative MRSA detection, suggesting its potential as a treatment for osteomyelitis.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2022)
Article
Immunology
Rei Fumimoto, Nao Otsuka, Tomimasa Sunagawa, Keiko Tanaka-Taya, Hajime Kamiya, Kazunari Kamachi
Article
Multidisciplinary Sciences
Rei Fumimoto, Nao Otsuka, Hajime Kamiya, Tomimasa Sunagawa, Keiko Tanaka-Taya, Kazunari Kamachi, Keigo Shibayama
Article
Plant Sciences
Mohamed A. A. Orabi, Esam A. Orabi, Shoko Taniguchi, Hiroshi Sakagami, Morio Yoshimura, Yoshiaki Amakura, Tsutomu Hatano
JOURNAL OF NATURAL PRODUCTS
(2019)
Article
Microbiology
Kazunari Kamachi, Nao Otsuka, Rei Fumimoto, Kensuke Ozawa, Shu-Man Yao, Chuen-Sheue Chiang, Laurence Don Wai Luu, Ruiting Lan, Keigo Shibayama, Mineo Watanabe
JOURNAL OF MEDICAL MICROBIOLOGY
(2019)
Article
Multidisciplinary Sciences
Rui Ting Ni, Motoyasu Onishi, Minako Mizusawa, Ryoko Kitagawa, Takanori Kishino, Futoshi Matsubara, Tomofusa Tsuchiya, Teruo Kuroda, Wakano Ogawa
SCIENTIFIC REPORTS
(2020)
Article
Multidisciplinary Sciences
Kazunari Kamachi, Shu-Man Yao, Chuen-Sheue Chiang, Kentaro Koide, Nao Otsuka, Keigo Shibayama
Summary: A SNP genotyping method was developed for the Bordetella pertussis MT27 strain, showing its applicability to the circulating strain and an increase in genotypic diversity in the 2010s. The method allows for rapid and simple genotyping, with potential usefulness in outbreak investigations and routine surveillance.
SCIENTIFIC REPORTS
(2021)
Article
Immunology
Yuji Wakimoto, Nao Otsuka, Yasuaki Yanagawa, Kentaro Koide, Kazunari Kamachi, Keigo Shibayama, Katsuji Teruya, Yoshimi Kikuchi, Shinichi Oka
Summary: This report describes a case of bacteremia in a HIV-infected patient caused by an attenuated Bordetella pertussis strain lacking two major virulence factors, filamentous hemagglutinin and fimbriae. Even though B pertussis bacteremia is rare, it can still cause invasive infection in immunocompromised patients. The bacterium typically colonizes the human respiratory tract epithelial cells and causes whooping cough.
OPEN FORUM INFECTIOUS DISEASES
(2022)
Article
Infectious Diseases
Kentaro Koide, ShuMan Yao, Chuen-Sheue Chiang, Phung Thi Bich Thuy, Do Thi Thuy Nga, Do Thu Huong, Tran Minh Dien, Ork Vichit, Yong Vutthikol, Siphan Sovannara, Chham Samnang, Ikuyo Takayama, Akira Ainai, Noriko Nakajima, Nao Otsuka, Kazunari Kamachi, Akihiko Saitoh
Summary: This study investigated the genotype and macrolide resistance of Bordetella pertussis in East and Southeast Asia. It revealed that macrolide-resistant B. pertussis may have spread from mainland China to East and Southeast Asia after its emergence.
JOURNAL OF GLOBAL ANTIMICROBIAL RESISTANCE
(2022)
Article
Microbiology
Kentaro Koide, Takahiro Yamaguchi, Chihiro Katsukawa, Nao Otsuka, Tsuyoshi Kenri, Kazunari Kamachi
Summary: We present the complete genome sequence of macrolide-resistant Bordetella pertussis BP616, a strain first isolated in Japan in 2018. The BP616 genome can serve as a valuable specific reference for genomic and epidemiological studies of this resistant bacterium.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2022)
Article
Genetics & Heredity
Hayata Dodan, Makoto Hiromura, Rui Ting Ni, Futoshi Matsubara, Teruo Kuroda, Wakano Ogawa
Summary: RND-type multidrug efflux systems play a crucial role in protecting Gram-negative bacteria from antimicrobial agents. This study identifies a mutation in the crrB gene as an important factor for KexD overexpression, which is associated with multidrug resistance.
Article
Multidisciplinary Sciences
Nao Otsuka, Kentaro Koide, Masataka Goto, Kazunari Kamachi, Tsuyoshi Kenri
Summary: Autoagglutination of Bordetella pertussis is caused by high levels of Fim3 protein and has been prevalent in Japan over the past two decades.
SCIENTIFIC REPORTS
(2023)
Article
Microbiology
Kazunari Kamachi, Kentaro Koide, Nao Otsuka, Masataka Goto, Tsuyoshi Kenri
Summary: Bordetella pertussis is a highly infectious bacterium that easily causes pertussis outbreaks in humans, especially in school-aged children. In detection and investigation of outbreaks, excluding non-outbreak isolates is important for understanding the bacterial transmission routes.
MICROBIOLOGY SPECTRUM
(2023)
Letter
Immunology
Kazunari Kamachi, Hong T. Duong, Anh D. Dang, Hai T. Do, Kentaro Koide, Nao Otsuka, Keigo Shibayama, Ha Thi Thu Hoang
EMERGING INFECTIOUS DISEASES
(2020)
Article
Multidisciplinary Sciences
Shinsuke Toba, Yusuke Minato, Yuma Kondo, Kanami Hoshikawa, Shu Minagawa, Shiho Komaki, Takanori Kumagai, Yasuyuki Matoba, Daichi Morita, Wakano Ogawa, Naomasa Gotoh, Tomofusa Tsuchiya, Teruo Kuroda
SCIENTIFIC REPORTS
(2019)
Article
Biochemistry & Molecular Biology
Yu Ishima, Kaori Watanabe, Victor T. G. Chuang, Iyo Takeda, Teruo Kuroda, Wakano Ogawa, Hiroshi Watanabe, Yasunori Iwao, Tatsuhiro Ishida, Masaki Otagiri, Toru Maruyama