1
|
Srisrattakarn A, Charoensri N, Prompipak J, Ouancharee W, Saiboonjan B, Tippayawat P, Chanawong A, Wonglakorn L, Kanwattanee E, Piyapatthanakul S, Masmalai T, Ariyapim A, Kendal RP, Lulitanond A. Rapid detection of Staphylococcus aureus in blood culture samples using human IgG-based lateral flow assay. Microbiol Spectr 2024; 12:e0304623. [PMID: 38230955 PMCID: PMC10846088 DOI: 10.1128/spectrum.03046-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 12/18/2023] [Indexed: 01/18/2024] Open
Abstract
Staphylococcus aureus is one of the most common pathogens. The conventional workflow for identifying this organism is time-consuming and takes up to several days. Therefore, we developed a colloidal gold-based lateral flow immunoassay (LFIA) using human IgG as a conjugated antibody to detect S. aureus. One hundred and thirty-eight clinical isolates, including 79 S. aureus and 59 non-S. aureus were spiked in blood samples, and incubated at 37°C for 24 h. The bacterial antigens were simply extracted before being tested by the developed LFIA strips. The results were read by the naked eye within 15 min. Conventional PCR was used as a reference method. The sensitivity and specificity of the developed LFIA were 100% (95% CI: 94.2%-100.0% and 92.4%-100.0%, respectively) in spiked blood culture samples. The detection limits of the LFIA for the purified protein A and bacterial colonies were 10-3 µg/mL and 107 CFU/mL, respectively. The performance of the LFIA testing in 221 bacterial colony isolates and 118 positive blood culture bottles from three hospitals by their medical technologists showed 98.1% (95% CI: 94.1%-99.5%) and 89.7% (95% CI: 79.3%-95.4%) sensitivity, respectively. The LFIA is a quick, easy, and sensitive method for detecting S. aureus without expensive equipment. It might have the potential for early diagnosis of routine service in low-resource laboratories, leading to a rapid and effective treatment.IMPORTANCEIn this study, we modified our previously developed lateral flow immunoassay (LFIA) test for the detection of Staphylococcus aureus by using an in-house human IgG as a conjugated antibody instead of the specific commercial antibody. It gave comparable results to the former developed-LFIA test and helped cost reduction.
Collapse
Affiliation(s)
- Arpasiri Srisrattakarn
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Nicha Charoensri
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Jeerati Prompipak
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Wajeeorn Ouancharee
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Bhanubong Saiboonjan
- Center for Innovation and Standard for Medical Technology and Physical Therapy, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Patcharaporn Tippayawat
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Aroonwadee Chanawong
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Lumyai Wonglakorn
- Clinical Microbiology Unit, Srinagarind Hospital, Khon Kaen University, Khon Kaen, Thailand
| | - Ekgarak Kanwattanee
- Clinical Microbiology Laboratory, The Queen Sirikit National Institute of Child Health, Bangkok, Thailand
| | - Sirikan Piyapatthanakul
- Clinical Microbiology Laboratory, The Queen Sirikit National Institute of Child Health, Bangkok, Thailand
| | - Thitimar Masmalai
- Clinical Laboratory, Queen Sirikit Heart Center of the Northeast, Khon Kaen University, Khon Kaen, Thailand
| | - Anisara Ariyapim
- Clinical Laboratory, Queen Sirikit Heart Center of the Northeast, Khon Kaen University, Khon Kaen, Thailand
| | | | - Aroonlug Lulitanond
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| |
Collapse
|
2
|
Esfandiary R, Saeedi P, Saffarian P, Halabian R, Fooladi AAI. Activated mesenchymal stem cells increase drug susceptibility of methicillin-resistant Staphylococcus aureus and Pseudomonas aeruginosa. Folia Microbiol (Praha) 2024; 69:145-154. [PMID: 37924430 DOI: 10.1007/s12223-023-01099-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 10/02/2023] [Indexed: 11/06/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa are major causes of hospital-acquired infections and sepsis. Due to increasing antibiotic resistance, new treatments are needed. Mesenchymal stem cells (MSCs) have antimicrobial effects, which can be enhanced by preconditioning with antibiotics. This study investigated using antibiotics to strengthen MSCs against MRSA and P. aeruginosa. MSCs were preconditioned with linezolid, vancomycin, meropenem, or cephalosporin. Optimal antibiotic concentrations were determined by assessing MSC survival. Antimicrobial effects were measured by minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and antimicrobial peptide (AMP) gene expression. Optimal antibiotic concentrations for preconditioning MSCs without reducing viability were 1 μg/mL for linezolid, meropenem, and cephalosporin and 2 μg/mL for vancomycin. In MIC assays, MSCs preconditioned with linezolid, vancomycin, meropenem, or cephalosporin inhibited MRSA or P. aeruginosa growth at lower concentrations than non-preconditioned MSCs (p ≤ 0.001). In MBC assays, preconditioned MSCs showed enhanced bacterial clearance compared to non-preconditioned MSCs, especially when linezolid and vancomycin were used against MRSA (p ≤ 0.05). Preconditioned MSCs showed increased expression of genes encoding the antimicrobial peptide genes hepcidin and LL-37 compared to non-preconditioned MSCs. The highest hepcidin expression was seen with linezolid and vancomycin preconditioning (p ≤ 0.001). The highest LL-37 expression was with linezolid preconditioning (p ≤ 0.001). MSCs' preconditioning with linezolid, vancomycin, meropenem, or cephalosporin at optimal concentrations enhances their antimicrobial effects against MRSA and P. aeruginosa without compromising viability. This suggests preconditioned MSCs could be an effective adjuvant treatment for antibiotic-resistant infections. The mechanism may involve upregulation of AMP genes.
Collapse
Affiliation(s)
- Reza Esfandiary
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Bqiyatallah University of Medical Sciences, Tehran, Iran
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Pardis Saeedi
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Bqiyatallah University of Medical Sciences, Tehran, Iran
| | - Parvaneh Saffarian
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Raheleh Halabian
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Bqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Abbas Ali Imani Fooladi
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Bqiyatallah University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
3
|
Al Mansour N, Al-Kafaji G, Al Mahmeed A, Bindayna KM. Dysregulation of human beta-defensin-3 expression in the peripheral blood of patients with sepsis. SAGE Open Med 2021; 9:20503121211041515. [PMID: 34457302 PMCID: PMC8385589 DOI: 10.1177/20503121211041515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
Objectives: Sepsis is a serious medical condition caused by the body’s systemic inflammatory response to infections. The antimicrobial peptides, human beta-defensins, play a key role in modulating host immune responses, and aberrant expression of human beta-defensins has been implicated in many infections and inflammatory diseases. However, little is known about the expression of human beta-defensin-3 in systemic infectious diseases. Methods: We investigated the gene expression and protein level of human beta-defensin-3 in peripheral whole blood from 107 participants—67 patients with sepsis and 40 healthy controls—and evaluated the feasibility of human beta-defensin-3 as an indicator for sepsis. Total RNA was extracted from peripheral blood samples, and relative mRNA expression of human beta-defensin-3 was determined by reverse transcription-quantitative polymerase chain reaction. Plasma concentration of human beta-defensin-3 was measured by enzyme-linked immunosorbent assay. Pearson’s correlation analysis was performed to assess the relationship between human beta-defensin-3 mRNA and protein levels. Receiver operating characteristic analysis was performed to evaluate the value of human beta-defensin-3 as a biomarker for sepsis. Results: Human beta-defensin-3 mRNA expression was significantly downregulated in sepsis patients compared to controls (p = 0.001). The mean fold change of mRNA expression (±standard error) was 0.82 ± 0.63 in sepsis patients and 1.39 ± 1.09 in controls. Plasma concentration of human beta-defensin-3 (pg/mL) was significantly lower in sepsis patients compared to healthy controls (p = 0.039). The mean protein concentration (±standard error) was 539.6 ± 39.4 in sepsis patients and 715.5 ± 53 in controls. There was a significant correlation between human beta-defensin-3 mRNA expression and the corresponding protein level in sepsis patients (r = 0.358, p = 0.04), but not in healthy controls (r = 0.124, p = 0.51). For discriminating sepsis patients from healthy controls, the area under the receiver operating characteristic curve was 0.722 (95% confidence interval: 0.597–0.847, p = 0.002) for human beta-defensin-3 mRNA and 0.689 (95% confidence interval: 0.557–0.827, p = 0.009) for human beta-defensin-3 protein. Conclusion: This is the first study to show the downregulation of human beta-defensin-3 gene expression and protein level in sepsis, which may contribute to the complex immunological imbalance in sepsis. The significant correlation between human beta-defensin-3 mRNA expression and protein concentration suggests that mRNA expression could be used to predict protein level. Our study also showed a potential role of human beta-defensin-3 as a blood-based biomarker for sepsis. More studies on the clinical significance of human beta-defensin-3 in sepsis could further support a biomarker development.
Collapse
Affiliation(s)
- Noura Al Mansour
- Department of Microbiology, Immunology and Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Kingdom of Bahrain
| | - Ghada Al-Kafaji
- Department of Molecular Medicine and Al-Jawhara Centre for Molecular Medicine, Genetics, and Inherited Disorders, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Kingdom of Bahrain
| | - Ali Al Mahmeed
- Department of Microbiology, Immunology and Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Kingdom of Bahrain
| | - Khalid M Bindayna
- Department of Microbiology, Immunology and Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Kingdom of Bahrain
| |
Collapse
|
4
|
Asgari F, Supino D, Parente R, Polentarutti N, Stravalaci M, Porte R, Pasqualini F, Barbagallo M, Perucchini C, Recordati C, Magrini E, Mariancini A, Riva F, Giordano A, Davoudian S, Roger T, Veer CV, Jaillon S, Mantovani A, Doni A, Garlanda C. The Long Pentraxin PTX3 Controls Klebsiella Pneumoniae Severe Infection. Front Immunol 2021; 12:666198. [PMID: 34093560 PMCID: PMC8173212 DOI: 10.3389/fimmu.2021.666198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/04/2021] [Indexed: 12/29/2022] Open
Abstract
Klebsiella pneumoniae is a common pathogen in human sepsis. The emergence of multidrug-resistant K. pneumoniae strains represents a major clinical challenge in nosocomial and community acquired infections. The long pentraxin PTX3, a key component of humoral innate immunity, is involved in resistance to selected pathogens by promoting opsonophagocytosis. We investigated the relevance of PTX3 in innate immunity against K. pneumoniae infections using Ptx3-/- mice and mouse models of severe K. pneumoniae infections. Local and systemic PTX3 expression was induced following K. pneumoniae pulmonary infection, in association with the up-regulation of TNF-α and IL-1β. PTX3 deficiency in mice was associated with higher bacterial burden and mortality, release of pro-inflammatory cytokines as well as IL-10 in the lung and systemically. The analysis of the mechanisms responsible of PTX3-dependent control of K. pneumoniae infection revealed that PTX3 did not interact with K. pneumoniae, or promote opsonophagocytosis. The comparison of susceptibility of wild-type, Ptx3-/-, C3-/- and Ptx3-/-/C3-/- mice to the infection showed that PTX3 acted in a complement-independent manner. Lung histopathological analysis showed more severe lesions in Ptx3-/- mice with fibrinosuppurative, necrotizing and haemorrhagic bronchopneumonia, associated with increased fibrin deposition in the lung and circulating fibrinogen consumption. These findings indicate that PTX3 contributes to the control of K. pneumoniae infection by modulating inflammatory responses and tissue damage. Thus, this study emphasizes the relevance of the role of PTX3 as regulator of inflammation and orchestrator of tissue repair in innate responses to infections.
Collapse
Affiliation(s)
- Fatemeh Asgari
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Domenico Supino
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Raffaella Parente
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Nadia Polentarutti
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Matteo Stravalaci
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Remi Porte
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Fabio Pasqualini
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Marialuisa Barbagallo
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Chiara Perucchini
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Camilla Recordati
- Department of Veterinary Medicine, University of Milano, Lodi, Italy
| | - Elena Magrini
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Andrea Mariancini
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Federica Riva
- Department of Veterinary Medicine, University of Milano, Lodi, Italy
| | - Alessia Giordano
- Department of Veterinary Medicine, University of Milano, Lodi, Italy
| | - Sadaf Davoudian
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Thierry Roger
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Epalinges, Switzerland
| | - Cornelis Van't Veer
- Center of Experimental and Molecular Medicine, Academic Medical Center, Amsterdam, Netherlands
| | - Sebastien Jaillon
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Alberto Mantovani
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy.,Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Andrea Doni
- Unit of Advanced Optical Microscopy, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Cecilia Garlanda
- Department of Inflammation and Immunology, IRCCS Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| |
Collapse
|
5
|
Wang Y, Du P, Jiang D. Berberine functions as a negative regulator in lipopolysaccharide -induced sepsis by suppressing NF-κB and IL-6 mediated STAT3 activation. Pathog Dis 2020; 78:5898670. [PMID: 32857851 DOI: 10.1093/femspd/ftaa047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 08/26/2020] [Indexed: 01/05/2023] Open
Abstract
Sepsis is a deadly complication raised by bacterial pathogens-induced dysregulated innate inflammatory response. Thus, anti-inflammatory is a potential therapeutic treatment for septic patients. Numerous evidence exhibited that berberine possesses potent anti-inflammatory, anti-apoptotic and anti-oxidative activities. However, the effect of berberine on sepsis is not fully understood. The anti-inflammatory effect of berberine was evaluated using lipopolysaccharide (LPS)-induced macrophages differentiation model in vitro and using LPS/D-galactosamine-challenged septic mice model in vivo. The secreted protein levels were determined by ELISA assay. The multiple targets mRNA and protein levels were measured by quantitative RT-PCR and western blot assay, respectively. Our study demonstrated that administration of berberine significantly attenuated lung tissue injury, and potently increased the survival rate of septic mice by modulating excessive inflammatory response with negligible side-effects. We further found that berberine inhibited the expression of tumor necrosis factor (TNF)-α, interleukin-(IL)-1β and IL-6 via suppressing nuclear factor kappa B subunit 1 (NF-κB) signaling activation. Our study strongly supported the concept that berberine may serve as a single drug or a promising adjuvant that can be used in conjunction with other medications for the treatment of septic patients.
Collapse
Affiliation(s)
- Yin Wang
- Department of Intensive Medicine, the Affiliated Hospital of Jiangnan University, Wuxi 214062, Jiangsu, China
| | - Pengfei Du
- Department of Intensive Medicine, the Affiliated Hospital of Jiangnan University, Wuxi 214062, Jiangsu, China
| | - Donghui Jiang
- Department of Intensive Medicine, the Affiliated Hospital of Jiangnan University, Wuxi 214062, Jiangsu, China
| |
Collapse
|
6
|
Bi W, Lan X, Zhang J, Xiao S, Cheng X, Wang H, Lu D, Zhu L. USP8 ameliorates cognitive and motor impairments via microglial inhibition in a mouse model of sepsis-associated encephalopathy. Brain Res 2019; 1719:40-48. [PMID: 31075263 DOI: 10.1016/j.brainres.2019.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/29/2019] [Accepted: 05/06/2019] [Indexed: 02/08/2023]
Abstract
Sepsis-associated encephalopathy (SAE) is a common and serious complication of sepsis, which is thought to be caused by neuroinflammation. In our previous study, ubiquitin-specific protease 8 (USP8), was reported to regulate inflammation in vitro. In the current study, we investigated whether increased USP8 expression would ameliorate the cognitive and motor impairments induced by cecal ligation and puncture (CLP) in mice, a model of SAE. Male adult mice were randomly divided into four groups: control, sham, CLP, and CLP + USP8 groups. The CLP + USP8 mice showed reduced weight loss on day 4 post-CLP, with a slight increase noted on day 7. The mortality rate in the CLP group was 70% 48 h after CLP; however, USP8 significantly improved survival after CLP. USP8 modulated the neurobehavioral scores in CLP mice. Our results also indicate that USP8 attenuated the CLP-induced cognitive and motor impairments, based on the performance of mice in the Morris water maze (MWM), pole-climbing, and wire suspension tests. USP8 suppressed the release of pro-inflammatory mediators, including prostaglandin E2(PGE2) in the serum and nitric oxide (NO) in brain tissue, as well as levels of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) in brain tissue. Immunofluorescence experiments revealed that USP8 inhibited CLP-induced increases in microglial size and density in the hippocampus, and protected hippocampal neurons. Our findings indicate that neuroinflammation occurs in the brains of CLP mice, and that USP8 exerts protective effects against CLP-induced neuroinflammation and cognitive and motor impairments, which may aid in the development of novel therapeutic strategies for SAE.
Collapse
Affiliation(s)
- Wei Bi
- Department of Neurology, The First Affiliated Hospital of Jinan University, Guangzhou 510630, PR China
| | - Xin Lan
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - JiaWei Zhang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - Shu Xiao
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - XiaoFeng Cheng
- Department of Neurology, The First Affiliated Hospital of Jinan University, Guangzhou 510630, PR China
| | - HuaDong Wang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - DaXiang Lu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - Lihong Zhu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China.
| |
Collapse
|
7
|
Leite-Avalca MCG, Staats FT, Verona D, de Souza P, Almeida MC, Silva-Santos JE, Zampronio AR. Cannabinoid CB1 Receptor Antagonist Rimonabant Decreases Levels of Markers of Organ Dysfunction and Alters Vascular Reactivity in Aortic Vessels in Late Sepsis in Rats. Inflammation 2018; 42:618-627. [DOI: 10.1007/s10753-018-0919-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
8
|
Kurundu Hewage EMK, Spear D, Umstead TM, Hu S, Wang M, Wong PK, Chroneos ZC, Halstead ES, Thomas NJ. An Electrochemical Biosensor for Rapid Detection of Pediatric Bloodstream Infections. SLAS Technol 2017; 22:616-625. [PMID: 28850805 DOI: 10.1177/2472630317727704] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Bloodstream infections are major contributing factors of morbidity and mortality among children. Precise and timely identification of causative agents can improve the clinical management and outcome of the infection, potentially saving lives. Electrochemical biosensors previously described by Gao et al. (2017) have the potential to deliver greater speed and discrimination. However, to date there are no data that determine whether the age of the host would cause bacteria to demonstrate different growth characteristics, or whether pediatric samples would behave differently using this electrochemical biosensor. The importance of this knowledge gap is clear: the preclinical testing phase of this line of research is limited by the relative lack of pediatric healthy blood volunteers to complete this work. Therefore, in this study we have applied this novel technology to diagnose bacteria spiked into pediatric blood and compared directly with adult blood samples. Only 180 µL of blood was utilized from both adult and pediatric volunteers and inoculated with Escherichia coli 67, and the signals generated at different time points were compared. We were able to demonstrate that the signals generated by adult and pediatric blood were not significantly different with this detection technology.
Collapse
Affiliation(s)
- Eranda M K Kurundu Hewage
- 1 Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Debbie Spear
- 2 Division of Pediatric Critical Care Medicine, Department of Pediatrics, Penn State Health Children's Hospital, Hershey, PA, USA
| | - Todd M Umstead
- 1 Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Sanmei Hu
- 1 Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Ming Wang
- 3 Department of Public Health Sciences, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Pak Kin Wong
- 4 Department of Biomedical Engineering, Mechanical Engineering and Surgery, Pennsylvania State University, University Park, Hershey, PA, USA
| | - Zissis C Chroneos
- 1 Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA.,5 Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - E Scott Halstead
- 1 Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA.,2 Division of Pediatric Critical Care Medicine, Department of Pediatrics, Penn State Health Children's Hospital, Hershey, PA, USA
| | - Neal J Thomas
- 1 Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA.,3 Department of Public Health Sciences, Pennsylvania State University College of Medicine, Hershey, PA, USA
| |
Collapse
|
9
|
Zhang LN, Wang XH, Wu L, Huang L, Zhao CG, Peng QY, Ai YH. Diagnostic and Predictive Levels of Calcium-binding Protein A8 and Tumor Necrosis Factor Receptor-associated Factor 6 in Sepsis-associated Encephalopathy: A Prospective Observational Study. Chin Med J (Engl) 2017; 129:1674-81. [PMID: 27411454 PMCID: PMC4960956 DOI: 10.4103/0366-6999.185860] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Background: Despite its high prevalence, morbidity, and mortality, sepsis-associated encephalopathy (SAE) is still poorly understood. The aim of this prospective and observational study was to investigate the clinical significance of calcium-binding protein A8 (S100A8) in serum and tumor necrosis factor receptor-associated factor 6 (TRAF6) in peripheral blood mononuclear cells (PBMCs) in diagnosing SAE and predicting its prognosis. Methods: Data of septic patients were collected within 24 h after Intensive Care Unit admission from July 2014 to March 2015. Healthy medical personnel served as the control group. SAE was defined as cerebral dysfunction in the presence of sepsis that fulfilled the exclusion criteria. The biochemical indicators, Glasgow Coma Scale, Acute Physiology and Chronic Health Evaluation score II, TRAF6 in PBMC, serum S100A8, S100β, and neuron-specific enolase were evaluated in SAE patients afresh. TRAF6 and S100A8 were also measured in the control group. Results: Of the 57 enrolled patients, 29 were diagnosed with SAE. The S100A8 and TRAF6 concentrations in SAE patients were both significantly higher than that in no-encephalopathy (NE) patients, and higher in NE than that in controls (3.74 ± 3.13 vs. 1.08 ± 0.75 vs. 0.37 ± 0.14 ng/ml, P < 0.01; 3.18 ± 1.55 vs. 1.02 ± 0.63 vs. 0.47 ± 0.10, P < 0.01). S100A8 levels of 1.93 ng/ml were diagnostic of SAE with 92.90% specificity and 69.00% sensitivity in the receiver operating characteristic (ROC) curve, and the area under the curve was 0.86 (95% confidence interval [CI]: 0.76–0.95). TRAF6-relative levels of 1.44 were diagnostic of SAE with 85.70% specificity and 86.20% sensitivity, and the area under the curve was 0.94 (95% CI: 0.88–0.99). In addition, S100A8 levels of 2.41 ng/ml predicted 28-day mortality of SAE with 90.00% specificity and 73.70% sensitivity in the ROC curve, and the area under the curve was 0.88. TRAF6 relative levels of 2.94 predicted 28-day mortality of SAE with 80.00% specificity and 68.40% sensitivity, and the area under the curve was 0.77. Compared with TRAF6, the specificity of serum S100A8 in diagnosing SAE and predicting mortality was higher, although the sensitivity was low. In contrast, the TRAF6 had higher sensitivity for diagnosis. Conclusions: Peripheral blood levels of S100A8 and TRAF6 in SAE patients were elevated and might be related to the severity of SAE and predict the outcome of SAE. The efficacy and specificity of S100A8 for SAE diagnosis were superior, despite its weak sensitivity. S100A8 might be a better biomarker for diagnosis of SAE and predicting prognosis.
Collapse
Affiliation(s)
- Li-Na Zhang
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xiao-Hong Wang
- Department of Anesthesiology and Critical Care Medicine, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan 410008, China
| | - Long Wu
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Li Huang
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Chun-Guang Zhao
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Qian-Yi Peng
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yu-Hang Ai
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| |
Collapse
|