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Ibrahim A, Saleem N, Naseer F, Ahmed S, Munawar N, Nawaz R. From cytokines to chemokines: Understanding inflammatory signaling in bacterial meningitis. Mol Immunol 2024; 173:117-126. [PMID: 39116800 DOI: 10.1016/j.molimm.2024.07.004] [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: 10/16/2023] [Revised: 06/11/2024] [Accepted: 07/08/2024] [Indexed: 08/10/2024]
Abstract
Bacterial meningitis is a serious central nervous system (CNS) infection, claiming millions of human lives annually around the globe. The deadly infection involves severe inflammation of the protective sheath of the brain, i.e., meninges, and sometimes also consists of the brain tissue, called meningoencephalitis. Several inflammatory pathways involved in the pathogenesis of meningitis caused by Streptococcus pneumoniae, Neisseria meningitidis, Escherichia coli, Haemophilus influenzae, Mycobacterium tuberculosis, Streptococcus suis, etc. are mentioned in the scientific literature. Many in-vitro and in-vivo analyses have shown that after the disruption of the blood-brain barrier (BBB), these pathogens trigger several inflammatory pathways including Toll-Like Receptor (TLR) signaling in response to Pathogen-Associated Molecular Patterns (PAMPs), Nucleotide oligomerization domain (NOD)-like receptor-mediated signaling, pneumolysin related signaling, NF-κB signaling and many other pathways that lead to pro-inflammatory cascade and subsequent cytokine release including interleukine (IL)-1β, tumor necrosis factor(TNF)-α, IL-6, IL-8, chemokine (C-X-C motif) ligand 1 (CXCL1) along with other mediators, leading to neuroinflammation. The activation of another protein complex, nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3 (NLRP3) inflammasome, also takes place resulting in the maturation and release of IL-1β and IL-18, hence potentiating neuroinflammation. This review aims to outline the inflammatory signaling pathways associated with the pathogenesis of bacterial meningitis leading to extensive pathological changes in neurons, astrocytes, oligodendrocytes, and other central nervous system cells.
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Affiliation(s)
- Ahsan Ibrahim
- Shifa College of Pharmaceutical Sciences, Shifa Tameer e Millat University, Islamabad, Pakistan
| | - Nida Saleem
- Shifa College of Pharmaceutical Sciences, Shifa Tameer e Millat University, Islamabad, Pakistan
| | - Faiza Naseer
- Shifa College of Pharmaceutical Sciences, Shifa Tameer e Millat University, Islamabad, Pakistan; Department of Biosciences, Shifa Tameer e Millat University, Islamabad, Pakistan.
| | - Sagheer Ahmed
- Shifa College of Pharmaceutical Sciences, Shifa Tameer e Millat University, Islamabad, Pakistan.
| | - Nayla Munawar
- Department of Chemistry, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Rukhsana Nawaz
- Department of Clinical Psychology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
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Adami ME, Giamarellos-Bourboulis EJ, Polyzogopoulou E. Towards improved point-of-care (POC) testing for patients with suspected sepsis: POC tests for host biomarkers and possible microbial pathogens. Expert Rev Mol Diagn 2024:1-11. [PMID: 39135402 DOI: 10.1080/14737159.2024.2392283] [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: 06/12/2024] [Accepted: 08/11/2024] [Indexed: 08/15/2024]
Abstract
INTRODUCTION Sepsis is a heterogeneous syndrome often misdiagnosed. Point-of-care (POC) diagnostic tests are commonly used to guide decision and include host biomarkers and molecular diagnostics. AREAS COVERED The diagnostic and prognostic accuracy of established and emerging biomarkers for sepsis, including procalcitonin (PCT) soluble urokinase plasminogen activator receptor (suPAR), presepsin, TRAIL/IP-10/CRP, MxA, and MxA-CRP, are analyzed in this review. The clinical utility of the two prevalent molecular techniques for pathogens identification using polymerase chain reaction (PCR) assays is also presented: FILMARRAY and QIAstat-Dx RP. EXPERT OPINION The rising benefits of the combined use of POC biomarkers with molecular diagnostics in daily clinical routine appear to outperform conventional practices in terms of reduced turnaround time, timely diagnosis, and prompt administration of the appropriate treatment. Yet, this must be further demonstrated in future investigations. However, the cost-effectiveness of POC tests and the high rate of false positive and negative results, indicate the need for a comprehensive clinical evaluation.
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Affiliation(s)
- Maria-Evangelia Adami
- 4th Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | | | - Effie Polyzogopoulou
- Department of Emergency Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
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Cuesta G, Puerta-Alcalde P, Vergara A, Roses E, Bosch J, Casals-Pascual C, Soriano A, Marcos MÁ, Sanz S, Vila J. An Assessment of a New Rapid Multiplex PCR Assay for the Diagnosis of Meningoencephalitis. Diagnostics (Basel) 2024; 14:802. [PMID: 38667448 PMCID: PMC11048994 DOI: 10.3390/diagnostics14080802] [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: 03/01/2024] [Revised: 03/28/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
The rapid and broad microbiological diagnosis of meningoencephalitis (ME) has been possible thanks to the development of multiplex PCR tests applied to cerebrospinal fluid (CSF). We aimed to assess a new multiplex PCR panel (the QIAstat-Dx ME panel), which we compared to conventional diagnostic tools and the Biofire FilmArray ME Panel. The pathogens analyzed using both methods were Escherichia coli K1, Haemophilus influenzae, Listeria monocytogenes, Neisseria meningitidis, Streptococcus agalactiae, Streptococcus pneumoniae, Enterovirus, herpes simplex virus 1-2, human herpesvirus 6, human parechovirus, varicella zoster virus, and Cryptococcus neoformans/gattii. We used sensitivity, specificity, PPV, NPV, and kappa correlation index parameters to achieve our objective. Fifty CSF samples from patients with suspected ME were included. When conventional methods were used, 28 CSF samples (56%) were positive. The sensitivity and specificity for QIAstat-Dx/ME were 96.43% (CI95%, 79.8-99.8) and 95.24% (75.2-99.7), respectively, whereas the PPV and NPV were 96.43% (79.8-99.8) and 95.24% (75.1-99.7), respectively. The kappa value was 91.67%. Conclusions: A high correlation of the QIAstat-Dx ME panel with reference methods was shown. QIAstat-Dx ME is a rapid-PCR technique to be applied in patients with suspected ME with a high accuracy.
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Affiliation(s)
- Genoveva Cuesta
- Department of Clinical Microbiology, Hospital Clinic, 08036 Barcelona, Spain; (G.C.); (A.V.); (J.B.); (M.Á.M.)
| | - Pedro Puerta-Alcalde
- Department of Infectious Diseases, Hospital Clínic-IDIBAPS, University of Barcelona, 08007 Barcelona, Spain (A.S.)
| | - Andrea Vergara
- Department of Clinical Microbiology, Hospital Clinic, 08036 Barcelona, Spain; (G.C.); (A.V.); (J.B.); (M.Á.M.)
- Department of Basic Clinical Practice, Faculty of Medicine, University of Barcelona, 08007 Barcelona, Spain;
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Institute of Global Health of Barcelona (ISGlobal), 08036 Barcelona, Spain
| | - Enric Roses
- Department of Clinical Microbiology, Hospital Clinic, 08036 Barcelona, Spain; (G.C.); (A.V.); (J.B.); (M.Á.M.)
| | - Jordi Bosch
- Department of Clinical Microbiology, Hospital Clinic, 08036 Barcelona, Spain; (G.C.); (A.V.); (J.B.); (M.Á.M.)
- Institute of Global Health of Barcelona (ISGlobal), 08036 Barcelona, Spain
| | - Climent Casals-Pascual
- Department of Clinical Microbiology, Hospital Clinic, 08036 Barcelona, Spain; (G.C.); (A.V.); (J.B.); (M.Á.M.)
- Department of Basic Clinical Practice, Faculty of Medicine, University of Barcelona, 08007 Barcelona, Spain;
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Institute of Global Health of Barcelona (ISGlobal), 08036 Barcelona, Spain
| | - Alex Soriano
- Department of Infectious Diseases, Hospital Clínic-IDIBAPS, University of Barcelona, 08007 Barcelona, Spain (A.S.)
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Mª Ángeles Marcos
- Department of Clinical Microbiology, Hospital Clinic, 08036 Barcelona, Spain; (G.C.); (A.V.); (J.B.); (M.Á.M.)
- Department of Basic Clinical Practice, Faculty of Medicine, University of Barcelona, 08007 Barcelona, Spain;
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Institute of Global Health of Barcelona (ISGlobal), 08036 Barcelona, Spain
| | - Sergi Sanz
- Department of Basic Clinical Practice, Faculty of Medicine, University of Barcelona, 08007 Barcelona, Spain;
- Institute of Global Health of Barcelona (ISGlobal), 08036 Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Jordi Vila
- Department of Clinical Microbiology, Hospital Clinic, 08036 Barcelona, Spain; (G.C.); (A.V.); (J.B.); (M.Á.M.)
- Department of Basic Clinical Practice, Faculty of Medicine, University of Barcelona, 08007 Barcelona, Spain;
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Institute of Global Health of Barcelona (ISGlobal), 08036 Barcelona, Spain
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Boers SA, van Houdt R, van Sorge NM, Groot J, van Aarle Y, van Bussel MJAWM, Smit LFE, Wessels E, Claas ECJ. A multicenter evaluation of the QIAstat-Dx meningitis-encephalitis syndromic test kit as compared to the conventional diagnostic microbiology workflow. Eur J Clin Microbiol Infect Dis 2024; 43:511-516. [PMID: 38206519 PMCID: PMC10917839 DOI: 10.1007/s10096-024-04751-9] [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: 11/30/2023] [Accepted: 01/04/2024] [Indexed: 01/12/2024]
Abstract
PURPOSE Rapid diagnosis and treatment of infectious meningitis and encephalitis (ME) is critical to minimize morbidity and mortality. Recently, Qiagen introduced the CE-IVD QIAstat-Dx ME panel (QS-ME) for syndromic diagnostic testing of meningitis and encephalitis. Some data on the performance of the QS-ME in comparison to the BioFire FilmArray ME panel are available. In this study, the performance of the QS-ME is compared to the current diagnostic workflow in two academic medical centers in the Netherlands. METHODS A total of 110 cerebrospinal fluid samples were retrospectively tested with the QS-ME. The results obtained were compared to the results of laboratory-developed real-time PCR assays (LDTs), IS-pro, bacterial culture, and cryptococcal antigen (CrAg) testing. In addition, the accuracy of the QS-ME was also investigated using an external quality assessment (EQA) panel consisting of ten samples. RESULTS Four of the 110 samples tested failed to produce a valid QS-ME result. In the remaining 106 samples, the QS-ME detected 53/53 viral targets, 38/40 bacterial targets, and 7/13 Cryptococcus neoformans targets. The discrepant bacterial results consisted of two samples that were previously tested positive for Listeria monocytogenes (CT 35.8) and Streptococcus pneumoniae (CT 40), respectively. The QS-ME detected one additional result, consisting of a varicella-zoster virus signal (CT 35.9), in a sample in which both techniques detected Streptococcus pyogenes. Finally, 100% concordance was achieved in testing a blinded bacterial ME EQA panel. CONCLUSION The QS-ME is a relevant addition to the syndromic testing landscape to assist in diagnosing infectious ME.
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Affiliation(s)
- Stefan A Boers
- Dept. Medical Microbiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands.
| | - Robin van Houdt
- Dept. Medical Microbiology and Infection prevention, Amsterdam UMC location University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Nina M van Sorge
- Netherlands Reference Laboratory for Bacterial Meningitis, Amsterdam UMC location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Jelle Groot
- Dept. Medical Microbiology and Infection prevention, Amsterdam UMC location University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Yvette van Aarle
- Dept. Medical Microbiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Mario J A W M van Bussel
- Dept. Medical Microbiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Louise F E Smit
- Dept. Medical Microbiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Els Wessels
- Dept. Medical Microbiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Eric C J Claas
- Dept. Medical Microbiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
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