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Liu X, Liu S, Mai B, Su X, Guo X, Chang Y, Dong W, Wang W, Feng X. Synergistic gentamicin-photodynamic therapy against resistant bacteria in burn wound infections. Photodiagnosis Photodyn Ther 2022; 39:103034. [PMID: 35882288 DOI: 10.1016/j.pdpdt.2022.103034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 07/19/2022] [Accepted: 07/22/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Multi-resistant bacteria, a result of the abuse of antibiotics, have greatly frustrated the effectiveness of antibiotics and produced a variety of side-effects. The combination of antibiotics with other therapies like antimicrobial photodynamic therapy (aPDT) may provide a useful strategy for fighting resistant bacteria. Here, the synergistic bactericidal effects of toluidine blue (TB)-aPDT and gentamicin (GEN) were evaluated in vitro and in vivo. METHODS The Post-antibacterial effects were measured at 600 nm (OD600) by a microplate reader. The bacterial envelope and biofilm were observed by a field emission scanning electron microscope. The expression of oxidative stress and Agr system-related genes was analyzed by qRT-PCR after GEN combined with TB-aPDT (GEN&aPDT). Besides, the burn infection model was established to investigate the cloning efficiency of immobilized bacteria, wound healing and inflammatory factors in the lesions. RESULTS GEN&aPDT could inhibit the growth of S. aureus and multidrug-resistant S. aureus (MDR S. aureus) for up to 15 h, and destroyed the cell envelope and biofilm structure of S. aureus and MDR S. aureus. During the process, ROS played an important role, inducing oxidative stress and downregulating the expression of AgrA, AgrB and PSM in the Agr system, resulting in decreased bacterial virulence and infectivity. In addition, GEN&aPDT cotreatment could effectively promoted wound healing in burn-infected mice by reducing the numbers of bacterial colonization in the wound, decreasing the content of inflammatory factors, and increasing the expression of growth factors. CONCLUSION The present study confirmed a bactericidal synergy between GEN and aPDT in vitro and in vivo, therein, the oxidative stress exhibited an important role in decreasing bacterial virulence and infectivity, which may bring new ideas for the treatment of bacterial resistance.
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Affiliation(s)
- Xin Liu
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Shupei Liu
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Bingjie Mai
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Xiaomin Su
- Shaanxi Blood Center, Xi'an 710061, Shaanxi, China
| | - Xiaoyu Guo
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Yawei Chang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Wenzhuo Dong
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Weiqing Wang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Xiaolan Feng
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China.
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Nakayama S, Matsuda M, Adachi T, Sueda S, Ueda K, Kawahara K, Ohashi Y, Awaji S, Hashimoto S, Matsumura I. Tumor necrosis factor- and interleukin-6-producing high-grade B-cell lymphoma, not otherwise specified in the pleura. Leuk Res Rep 2018; 10:1-3. [PMID: 29998057 PMCID: PMC6037664 DOI: 10.1016/j.lrr.2018.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 06/01/2018] [Accepted: 06/14/2018] [Indexed: 12/01/2022] Open
Abstract
A 65-year-old man was admitted to our hospital with left-sided chest and back pain and dyspnea. Computed tomography demonstrated a marked circumferential left pleural thickening. A thoracoscopic pleural biopsy led to a diagnosis of high-grade B-cell lymphoma, not otherwise specified (HGBL, NOS). Lymphoma cells were positive for tumor necrosis factor (TNF) and interleukin-6. This is the first case report of TNF- and IL-6-producing aggressive HGBL, NOS in the pleura, in which radiological findings mimicked pleural mesothelioma. The aggressive tumor progression in the present case may have been caused by abnormal cytokine production from lymphoma cells.
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Affiliation(s)
- Shoko Nakayama
- Department of Hematology, PL General Hospital, 2204, Shindo, Tondabayashi City, Osaka 584-8585, Japan
| | - Mitsuhiro Matsuda
- Department of Hematology, PL General Hospital, 2204, Shindo, Tondabayashi City, Osaka 584-8585, Japan
| | - Tatsuya Adachi
- Department of Hematology, PL General Hospital, 2204, Shindo, Tondabayashi City, Osaka 584-8585, Japan
| | - Sanae Sueda
- Department of Hematology, PL General Hospital, 2204, Shindo, Tondabayashi City, Osaka 584-8585, Japan
| | - Kayo Ueda
- Department of Pathology, Osaka Prefectural Medical Center for Respiratory and Allergic Diseases, 3-7-1 Habikino, Osaka 583-8588, Japan
| | - Kunimitsu Kawahara
- Department of Pathology, Osaka Prefectural Medical Center for Respiratory and Allergic Diseases, 3-7-1 Habikino, Osaka 583-8588, Japan
| | - Yuka Ohashi
- Department of Pathology, PL General Hospital, 2204, Shindo, Tondabayashi City, Osaka 584-8585, Japan
| | - Sumie Awaji
- Department of Pathology, PL General Hospital, 2204, Shindo, Tondabayashi City, Osaka 584-8585, Japan
| | - Shigeo Hashimoto
- Department of Pathology, PL General Hospital, 2204, Shindo, Tondabayashi City, Osaka 584-8585, Japan
| | - Itaru Matsumura
- Division of Hematology and Rheumatology, Kinki University Faculty of Medicine, 377-2, Ono-Higashi, Osakasayama City, Osaka 589-8511, Japan
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