This study investigated antibiotic resistance and presence of persister cells in strains belonging to capsular types Ia/ST-103, III/ST-17, and V/ST-26 in biofilm-like environments. strains were susceptible to penicillin, clindamycin, and erythromycin. Resistance genes were associated with M (80%), O (20%), B (80%), and B (40%). Persister cells were detected in bacterial strains exposed to high concentrations of penicillin, clindamycin, and erythromycin. capsular type III/ST-17 exhibited the highest percentage of persister cells in response to penicillin and clindamycin, while type Ia/ST-103 presented the lowest percentages of persister cells for all antimicrobials tested. Additionally, persister cells were also detected at lower levels for erythromycin, regardless of capsular type or sequence type. Further, all isolates presented efflux pump activity in ethidium bromide-refractory cell assays. LIVE/DEAD fluorescence microscopy confirmed the presence of >85% viable persister cells after antibiotic treatment. These findings suggest that persister cells play a key role in the persistence of during antibiotic therapy, interfering with the treatment of invasive infections. Monitoring persister formation is crucial for developing strategies to combat recurrent infections caused by this pathogen.
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http://dx.doi.org/10.3390/antibiotics13111014 | DOI Listing |
Immun Ageing
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ICMR-National Institute of Translational Virology and AIDS Research (formerly ICMR-National AIDS Research Institute), 73, G block, MIDC, Bhosari, Pune, 411026, India.
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Department of Biotechnology, University of Mianwali, Punjab, 42200, Pakistan.
In Salmonella Typhimurium, efflux pump proteins, such as AcrD actively expel drugs and hazardous chemicals from bacterial cells, resulting in treatment failure and the emergence of antibiotic-resistant variants. Focusing on AcrD may lead to the development of novel antimicrobials against multidrug-resistant bacteria. However, challenges persist in achieving high selectivity, low toxicity, and effective bacterial penetration.
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Immunobiology Laboratory, Department of Biomedicine, University of Basel and University Hospital of Basel, Basel, Switzerland; Cambridge Institute of Therapeutic Immunology and Infectious Disease (CITIID), Department of Medicine, University of Cambridge, Cambridge, UK.
When B cells engage in an immune response, metabolic reprogramming is key to meeting cellular energetic and biosynthetic demands. Epstein-Barr virus (EBV) is a highly prevalent gamma-herpesvirus, latently infecting B cells for the human host's lifetime. By hijacking signaling pathways of T cell-dependent humoral immunity, EBV activates B cells in a T cell-independent manner, forcing lymphoblastoid transformation.
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Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Observatory, 7925, Cape Town, South Africa. Electronic address:
Cervical cancer is primarily driven by persistent infection with high-risk human papillomavirus (HPV) strains and remains a significant global health challenge, particularly in low- and middle-income countries where late-stage diagnoses is common. While vaccination and screening programs have reduced incidence rates, the need for novel and more effacacious and cost-effective therapeutic options is therefore critical especially for advanced cervical cancer. This review highlights several key advances in the understanding of HPV-induced carcinogenesis and the development of therapeutic strategies over the past five years.
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Department of Rheumatism and Immunology, Qingdao Hiser Hospital Affiliated of Qingdao University (Qingdao Traditional Chinese Medicine Hospital), No.4, Renmin Road, Shibei District, Qingdao, 266033, China.
Rheumatoid arthritis (RA) is an autoimmune condition that predominantly affects synovial joints, manifesting with joint swelling, pain, and stiffness. In advanced stages, unchecked inflammation can inflict damage on bone and cartilage, resulting in disabilities and deformities of the joints. Additionally, systemic and extra-articular complications may arise due to the consequences of uncontrolled inflammation.
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