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Zhang P, Ma Y, Wang Y, Dong E, Ma S. Design, Synthesis, and Biological Evaluation of 2-Phenoxyalkylhydrazide Benzoxazole Derivatives as Quorum Sensing Inhibitors with Strong Antibiofilm Effect. J Med Chem 2024; 67:5721-5743. [PMID: 38564271 DOI: 10.1021/acs.jmedchem.3c02379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
With the increasing problem of bacterial resistance to traditional antibiotics, there is an urgent need for new antibacterial agents with novel mechanisms to treat infections caused by drug-resistant bacteria. In this paper, we designed and synthesized 2-phenoxyalkylhydrazide benzoxazole derivatives and evaluated their quorum sensing inhibition activity. Among them, 26c at a concentration of 102.4 μg/mL not only inhibited the production of pyocyanin and rhamnolipid by 45.6% and 38.3%, respectively, but also suppressed 76.6% of biofilm production at 32 μg/mL. In addition, 26c did not affect bacterial growth, but in a mouse model infected with P. aeruginosa PAO1, it could help ciprofloxacin effectively eliminate the living bacteria. In the targeting experiment, 26c could inhibit the fluorescence intensity of PAO1-lasB-gfp and PAO1-pqsA-gfp in a concentration-dependent manner, indicating that the compound acts on the quorum sensing system. Overall, 26c is worthy of further investigation as a quorum sensing inhibitor with strong antibiofilm effect.
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Affiliation(s)
- Panpan Zhang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Yangchun Ma
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Yingmei Wang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Enhui Dong
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Shutao Ma
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 44 West Culture Road, Jinan 250012, China
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Yang B, Zhang W, Gu W, Zhang X, Wang M, Huang L, Zhu C, Yan Y, Ji W, Ni H, Chen Z. Differences of clinical features and prognosis between Mycoplasma pneumoniae necrotizing pneumonia and non-Mycoplasma pneumoniae necrotizing pneumonia in children. BMC Infect Dis 2021; 21:797. [PMID: 34376156 PMCID: PMC8356421 DOI: 10.1186/s12879-021-06469-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 07/26/2021] [Indexed: 12/03/2022] Open
Abstract
Background In the past few years, Mycoplasma pneumoniae (Shi et al. Lancet 390:946–958, 2017) infection has been reported more in China. However, there are few studies on the clinical characteristics and prognosis of necrotizing pneumonia (NP) (Griffiths et al. Nature 583:615–619, 2020) caused by different pathogens. Methods A retrospective analysis was performed, including 31 children with a clinical diagnosis of NP in the hospital from January 1, 2013 to January 31, 2020. A total of 11 children with MPNP were included in the observation group and the other 20 children with other pathogens were included in the control group. The clinical manifestations, laboratory data, imaging findings, treatments and outcomes were analyzed. Results The proportion of dyspnea cases was significantly higher in the non-Mycoplasma pneumoniae necrotizing pneumonia (N-MPNP) group than that in the Mycoplasma pneumoniae necrotizing pneumonia (MPNP) group (P = 0.02).The LDH level of all patients in the MPNP group was higher than the normal value, with a median value of 805.0 U/L, which was significantly higher than those in the N-MPNP group (414.0 [299.9–540.6] U/L; Z = − 2.518; P = 0.012). The white blood cells (WBCs) count of the N-MPNP group was 17.8 (11.1–21.7) × 109/L, which was significantly higher than that of the MPNP group (10.2 [6.3–14.1] × 109/L; P < 0.05). The mean time of pulmonary necrosis in the MPNP group was 20.9 ± 6.9 days, which was higher than that of the N-MPNP group (16.8 ± 6.1 days; t = 3.101; P = 0.004). The incidence of pleural effusion in the N-MPNP group (19 patients, 95%) was significantly higher than that in the MPNP group (six patients, 54.55%) (P = 0.013). Among them, two patients received bronchoscopy lavage at a maximum four times, and the cases of plastic bronchitis were seen only in the MPNP group (3 cases; P = 0.037).The length of stay was 18 (10–22) days in the MPNP group and 23.5 (13.5–47) days in the N-MPNP group and no significant difference was observed between the two groups (Z = − 1.923, P = − 0.055). Conclusions MP infection is the most common infection in children with NP in the Suzhou area. There is no gender and age difference between MPNP and N-MPNP, but the bacterial infection was mainly observed in the N-MPNP group. Children in the N-MPNP group have more severe clinical symptoms, were more prone to shortness of breath, had a longer hospital stay, and had earlier imaging manifestations of necrosis, whereas children in the MPNP group were more likely to have plastic bronchitis. The level of WBC and LDH and the nature of pleural effusion can be used to identify MPNP and N-MPNP to some extent. The prognosis of MPNP was better than that of N-MPNP. There were no death cases. Pleural thickening, pulmonary fibrosis, and bronchiectasis were the most common sequelae. Compared with N-MPNP, the recovery time of lung imaging in MPNP was shorter.
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Affiliation(s)
- Beilei Yang
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China.,Department of Pediatrics, Xishan People's Hospital of Wuxi, Wuxi, 214000, China
| | - Weili Zhang
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Wenjing Gu
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Xinxing Zhang
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Meijuan Wang
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Li Huang
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Canhong Zhu
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Yongdong Yan
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Wei Ji
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China
| | - Huiping Ni
- Department of Pediatrics, The Third Affiliated of Soochow University, Changzhou, 213000, China.
| | - Zhengrong Chen
- Department of Respiratory Disease, Children's Hospital of Soochow University, Suzhou, 215003, China.
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Wang J, Yun L, Zhao H, Li X. Combination Therapy of Polymyxin B and Amikacin for Community-Acquired Pseudomonas aeruginosa Pneumonia with MODS in a Previously Healthy Patient: A Case Report. Infect Drug Resist 2021; 14:2895-2900. [PMID: 34349524 PMCID: PMC8327293 DOI: 10.2147/idr.s312601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/25/2021] [Indexed: 11/23/2022] Open
Abstract
Background Pseudomonas aeruginosa (P. aeruginosa) is an uncommon but fatal causative pathogen for community-acquired pneumonia (CAP). Few case reports described the previously healthy individuals with CAP caused by P. aeruginosa. Case Presentation A 67-year-old male farmer was referred to our hospital with a 6-day history of fever and shortness of breath. The radiologic findings revealed a dense consolidation site in the right lung, considering infection lesion, accompanying with mediastinal and right hilar lymphadenopathy. Sputum sample results showed P. aeruginosa and multidrug-resistant Acinetobacter baumannii. The combination of polymyxin B and amikacin was given to him based on the lab results, the manifestations of the patient were alleviated and he returned to his home after a 35-day hospitalization. Conclusion We need to keep close attention to community-acquired P. aeruginosa pneumonia due to its high mortality, further studies are needed to identify the infectious source, effective examination, and optimal therapy including medications and duration.
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Affiliation(s)
- Junyu Wang
- Department of Pharmacy, Qingdao Central Hospital, Qingdao, 266042, Shandong, People's Republic of China
| | - Lu Yun
- Department of Pharmacy, Qingdao Central Hospital, Qingdao, 266042, Shandong, People's Republic of China
| | - Hong Zhao
- Department of Pharmacy, Qingdao Central Hospital, Qingdao, 266042, Shandong, People's Republic of China
| | - Xiangpeng Li
- Department of Pharmacy, The Affiliated Hospital of Qingdao University, Qingdao, 266003, Shandong, People's Republic of China
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Xing Y, Cheng D, Shi C, Shen Z. Early Prognosis Effect of Cellular Immune Paralysis on Brain Complications of Extracorporeal Membrane Oxygenation Children with Severe Sepsis. Neuroimmunomodulation 2021; 28:233-247. [PMID: 34375978 DOI: 10.1159/000509808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/24/2020] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE The aim of the study was to explore the relationship between criticality, brain complications, and immune mechanisms in extracorporeal membrane oxygenation (ECMO) children with pneumonia and severe sepsis. METHODS Patients with simple pneumonia (group I), ECMO patients with pneumonia and severe sepsis accompanied by brain complications (group II), and those without brain complication (group III) admitted to our pediatric intensive care unit were selected to be investigated. The relationship among the peripheral blood subgroups of immune cells, immune factors, adaptive immune responses, endothelial factors, and criticality and brain complications was then studied. RESULTS Severe paralysis of normal immunity, excess abnormal immunity, and endothelial injury were consistent with the increase in the absolute value of base excess, lactic acid (Lac) content, and average hospitalization days and brain complications involved in group II (vs. group I). The ratio of CD63+ macrophage and CD63+ neutrophil subpopulation increased (p < 0.05); the expression levels of elastase+ neutrophil denatured subgroup (p < 0.05), the ratio of CCR2highCX3CR1low/CCR2lowCX3CR1high of macrophages and neutrophils (p < 0.0001), high-mobility group box 1 (HMGB1), YTHDF1, interleukin-17 protein and mRNA, and RAGE gene decreased to some extent (p < 0.05); the expression levels of Th1 cells chemokine CXCL9 protein and mRNA and sTIE2 protein increased to some extent (p < 0.05); the adaptive immune response of CD8+ CTL stimulated by lipopolysaccharide (LPS) was slightly enhanced (p < 0.05) in group III(vs. group II), which was consistent with the improvement of criticality, average hospitalization days, and the absence of brain complications in group III (vs. group II). CONCLUSION ECMO support with brain complication was related to the upregulation of HMGB1 and YTHDF1 protein; the decreased number of CD63+ macrophages and neutrophils; the increased denatured neutrophil subgroup, especially the upregulated ratio of CCR2highCX3CR1low/CCR2lowCX3CR1high of macrophages and neutrophils; the imbalance of Th17/Th1, LPS-specific CD8+ CTL adaptive immune response paralysis; and the reduced endothelial sTIE2 protein expression level which caused clinical deterioration and prolonged average hospitalization days.
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Affiliation(s)
- Yan Xing
- Pediatric Intensive Care Unit (PICU) of People's hospital of Henan Province, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Dongliang Cheng
- Pediatric Intensive Care Unit (PICU) of People's hospital of Henan Province, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Changsong Shi
- Pediatric Intensive Care Unit (PICU) of People's hospital of Henan Province, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhiqing Shen
- Pediatric Intensive Care Unit (PICU) of People's hospital of Henan Province, People's Hospital of Zhengzhou University, Zhengzhou, China
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Mohamed B, Abdel-Samii ZK, Abdel-Aal EH, Abbas HA, Shaldam MA, Ghanim AM. Synthesis of imidazolidine-2,4-dione and 2-thioxoimidazolidin-4-one derivatives as inhibitors of virulence factors production in Pseudomonas aeruginosa. Arch Pharm (Weinheim) 2020; 353:e1900352. [PMID: 32134150 DOI: 10.1002/ardp.201900352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/11/2020] [Accepted: 02/13/2020] [Indexed: 12/19/2022]
Abstract
In an attempt to counteract bacterial pathogenicity, a set of novel imidazolidine-2,4-dione and 2-thioxoimidazolidin-4-one derivatives was synthesized and evaluated as inhibitors of bacterial virulence. The new compounds were characterized and screened for their effects on the expression of virulence factors of Pseudomonas aeruginosa, including protease, hemolysin, and pyocyanin. Imidazolidine-2,4-diones 4c, 4j, and 12a showed complete inhibition of the protease enzyme, and they almost completely inhibited the production of hemolysin at 1/4 MIC (1/4 minimum inhibitory concentration; 1, 0.5, and 0.5 mg/ml, respectively). 2-Thioxoimidazolidin-4-one derivative 7a exhibited the best inhibitory activity (96.4%) against pyocyanin production at 1 mg/ml (1/4 MIC). A docking study was preformed to explore the potential binding interactions with quorum-sensing receptors (LasR and RhlR), which are responsible for the expression of virulence genes.
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Affiliation(s)
- Basant Mohamed
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Zakaria K Abdel-Samii
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Eatedal H Abdel-Aal
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Hisham A Abbas
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Moataz A Shaldam
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Amany M Ghanim
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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Riviere P, Patin D, Delaporte E, Mahfoudi H, Lecailtel S, Poher F, Villette P, Duclaux J, Jouault P, Brunin G. Septic shock secondary to an acute necrotizing community-acquired pneumonia with bacteremia due to Pseudomonas aeruginosa. IDCases 2019; 17:e00563. [PMID: 31193456 PMCID: PMC6531848 DOI: 10.1016/j.idcr.2019.e00563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/11/2019] [Accepted: 05/12/2019] [Indexed: 11/06/2022] Open
Abstract
Necrotizing acute community-acquired pneumonia due to Pseudomonas aeruginosa are rare. Second description of a septic shock secondary to a necrotizing CAP with bacteremia due to P. aeruginosa for which pulmonary origin was proven by bronchoalveolar lavage fluid on a patient who survived. Anti-pseudomonal monotherapy may be may be a better option for older patients Despite risk factors related to the host or to the bacteria, the evolution remains unpredictable.
Pseudomonas aeruginosa is an uncommon cause of necrotizing acute community-acquired pneumonia (CAP). Only thirteen cases have been previously reported in the literature. In this article, we describe a case of previously healthy 80-year-old male patient, who presented in septic shock caused by necrotizing CAP. Despite inadequate empiric antimicrobial treatment, the patient survived and was able to return to his home after three weeks of hospitalization. To the best of our knowledge, this is the second case of septic shock secondary to P. aeruginosa necrotizing CAP and bacteremia, with optimal clinical outcome. We highlight the evolution of this pathology remains unpredictable, despite the factors related to the host and the bacterium.
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Affiliation(s)
- P Riviere
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - D Patin
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - E Delaporte
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - H Mahfoudi
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - S Lecailtel
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - F Poher
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - P Villette
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - J Duclaux
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - P Jouault
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
| | - G Brunin
- Hôpital Duchenne, Rue Monod, Service de réanimation, 62200 Boulogne-sur-Mer, France
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