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Delgado SL, Perilla PM, Salgado DM, Rojas MC, Narváez CF. Efficiency of Automated Viral RNA Purification for Pediatric Studies of Dengue and Zika in Hyperendemic Areas. J Trop Med 2023; 2023:1576481. [PMID: 37810169 PMCID: PMC10560119 DOI: 10.1155/2023/1576481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 10/10/2023] Open
Abstract
The isolation of nucleic acids is a critical and limiting step for molecular assays, which prompted the arrival in Colombia of automated purification instruments during the SARS-CoV-2 pandemic. The local application of this technology in the study of tropical diseases, such as dengue and zika, is beginning to be tested. We evaluated the efficiency of the automated extraction of viral RNA for studies of pediatric dengue and zika. Clinical samples of children with dengue that were well characterized through RNA isolation by silica columns and serotype-specific nested RT-PCR (DENV-1 n = 7, DENV-2 n = 5, and negatives n = 8) in addition to 40 pediatric plasma samples spiked with ZIKV (strain PRVA BC59) and 209 from negative pre-epidemic children were analyzed. RNA from patients was extracted by two automated standard and high-throughput protocols on the KingFisher™ Flex instrument. The isolated RNA was evaluated for concentration and purity by spectrophotometry, for structural and functional integrity by electrophoresis and expression of the RNase P gene, and usefulness in serotype-specific DENV detection by conventional and real-time RT-PCR. For the evaluation of ZIKV RNA, the commercial TaqMan Triplex® assay was used, along with a well-tested in-house RT-qPCR assay. The concentration of RNA (5.2 vs. 7.5 ng/μL, P=0.03) and the number of integral bands (9 vs. 11) were higher with the high-throughput protocol. However, the number of specimens serotyped for DENV by RT-qPCR was comparable for both protocols. The cycle thresholds of the TaqMan Triplex® commercial kit and the in-house assay for the detection of plasma ZIKV RNA isolated with the standard protocol showed a strong association (r = 0.93, P < 0.0001) and a Cohen Kappa index of 0.98 when all 249 samples were analyzed. These preliminary results suggest that automated instruments could be used in studies of cocirculating flaviviruses that have represented a public health problem in recent decades in Colombia. They boast advantages such as efficiency, precision, time savings, and lower risk of cross-contamination.
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Affiliation(s)
- Sandra L. Delgado
- División de Inmunología, Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
| | - Piedad M. Perilla
- División de Inmunología, Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
| | - Doris M. Salgado
- Área de Pediatría, Universidad Surcolombiana, Neiva, Huila, Colombia
| | - María Clemencia Rojas
- Laboratorio de Salud Pública, Secretaría de Salud Departamental del Huila, Neiva, Huila, Colombia
| | - Carlos F. Narváez
- División de Inmunología, Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
- Área de Pediatría, Universidad Surcolombiana, Neiva, Huila, Colombia
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Combination of the Focus-Forming Assay and Digital Automated Imaging Analysis for the Detection of Dengue and Zika Viral Loads in Cultures and Acute Disease. J Trop Med 2022; 2022:2177183. [PMID: 35911823 PMCID: PMC9325612 DOI: 10.1155/2022/2177183] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 06/26/2022] [Indexed: 12/03/2022] Open
Abstract
Optimized methods for the detection of flavivirus infections in hyperendemic areas are still needed, especially for working with patient serum as a starting material. The focus-forming assay (FFA) reveals critical aspects of virus-host interactions, as it is a quantitative assay to determine viral loads. Automated image analysis provides evaluations of relative amounts of intracellular viral protein at the single-cell level. Here, we developed an optimized FFA for the detection of infectious Zika virus (ZIKV) and dengue virus (DENV) viral particles in cell cultures and clinical serum samples, respectively. Vero-76 cells were infected with DENV-2 (16681) or ZIKV (PRVA BC59). Using a panel of anti-DENV and anti-ZIKV NS1-specific monoclonal antibodies (mAbs), the primary mAbs, concentration, and the optimal time of infection were determined. To determine whether intracellular accumulation of NS1 improved the efficiency of the FFA, brefeldin A was added to the cultures. Focus formation was identified by conventional optical microscopy combined with CellProfiler™ automated image analysis software. The FFA was used with spike assays for ZIKV and clinical specimens from natural infection by DENV-1 and DENV-2. mAb 7744-644 for ZIKV and mAb 724-323 for DENV used at a concentration of 1 μg/ml and a time of 24 hours postinfection produced the best detection of foci when combining conventional counting and automated digital analysis. Brefeldin A did not improve the assessment of FFUs or their digitally assessed intensity at single-cell level. The FFA showed 95% ZIKV recovery and achieved the detection of circulating DENV-1 and DENV-2 in the plasma of acutely ill patients. The combination of the two techniques optimized the FFA, allowing the study of DENV and ZIKV in culture supernatants and clinical specimens from natural infection in hyperendemic areas.
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Mahittikorn A, Mala W, Srisuphanunt M, Masangkay FR, Kotepui KU, Wilairatana P, Kotepui M. Tumour necrosis factor-α as a prognostic biomarker of severe malaria: a systematic review and meta-analysis. J Travel Med 2022; 29:6573410. [PMID: 35467747 DOI: 10.1093/jtm/taac053] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 11/14/2022]
Abstract
BACKGROUND Tumour necrosis factor-alpha (TNF-α) levels are reportedly altered during malaria. In this systematic review and meta-analysis, we aimed to collect and compare data on TNF-α levels between patients with malaria of varying severity and healthy asymptomatic positive controls. METHODS We searched PubMed, Scopus and Web of Science for studies that reported TNF-α levels in malaria cases of different severity and healthy asymptomatic positive controls using a combination of search terms. The quality of the included studies was assessed using the Strengthening the Reporting of Observational Studies in Epidemiology checklist. To compare the TNF-α levels among fatal cases, severe cases, uncomplicated cases and healthy asymptomatic positive controls, we applied the random-effects model that assumed the existence of variations between studies. The effect estimate was pooled mean difference (MD) with a 95% confidence interval (CI). RESULTS From 1694 studies, we included 31 studies that met our eligibility criteria for systematic review and meta-analysis. Patients with severe malaria showed higher mean TNF-α levels than those with uncomplicated malaria (P < 0.001, pooled MD = 79.02 pg/ml, 95% CI: 63.68-94.35 pg/ml, I2: 99.5%, n = 26 studies). Furthermore, fatal cases had no difference in the mean TNF-α levels in comparison with survived cases (P = 0.055, pooled MD = 82.38 pg/ml, 95% CI: -1.93 to 166.69 pg/ml, I2: 99.54%, n = 5 studies). Finally, patients with uncomplicated malaria showed higher mean TNF-α levels than those with asymptomatic malaria (P < 0.001, pooled MD = 45.10 pg/ml, 95% CI: 18.45-71.76 pg/ml, I2: 97.09%, n = 5 studies). CONCLUSION This systematic review and meta-analysis confirmed the increase of TNF-α levels in patients with severe malaria. Therefore, TNF-α may be alternatively used as a prognostic biomarker of severe malaria. TRIAL REGISTRATION Not applicable.
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Affiliation(s)
- Aongart Mahittikorn
- Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wanida Mala
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand
| | - Mayuna Srisuphanunt
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand
| | | | - Kwuntida Uthaisar Kotepui
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand
| | - Polrat Wilairatana
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Manas Kotepui
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand
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Sameshima T, Maeda Y, Mukai T, Goto M. Altered cytokine profiles in relapsed paucibacillary leprosy: a case report. BMC Infect Dis 2021; 21:1155. [PMID: 34774006 PMCID: PMC8590307 DOI: 10.1186/s12879-021-06836-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 11/01/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Individuals with relapses of leprosy should be monitored carefully, however, with respect to paucibacillary (PB) leprosy, it is sometimes difficult to make a definitive diagnosis of relapse, because the bacillary index is often negative. To evaluate the usefulness of cytokine profiling in a patient with relapsed PB leprosy who tested negative for anti-phenolic glycolipid-I antibodies, we analyzed the Mycobacterium leprae protein-induced cytokine expression in peripheral blood mononuclear cells of the patient. CASE PRESENTATION An 89-year-old-male relapsed PB patient, first treated for leprosy over 50 years prior, was examined. In April 2012, he noticed three skin lesions consisting of annular erythema in the thighs. Slit skin smear tests were negative, and skin biopsies revealed a pathology of indeterminate-to-borderline tuberculoid leprosy. He received 600 mg of rifampicin once per month and 75 mg of dapsone daily for 12 months. The annular erythemas disappeared after starting treatment. Before treatment, and 6 and 12 months after starting treatment, the Th1/Th2 cytokine profiles in the supernatant of mononuclear cells from the patient before and after stimulation with Mycobacterium leprae soluble protein (MLS) were examined using a Cytometric Bead Array (CBA) Human Th1/Th2 Cytokine Kit II. The CBA Enhanced Sensitivity Flex Set system was applied to detect small amounts of cytokines in the serum just before treatment and one year before relapse. In the culture supernatant, just before treatment, increases in IFN-γ level and the IFN-γ/IL-10 ratio and a decreased IL-6 level were observed without stimulation. Upon stimulation with MLS, just before treatment, both the IFN-γ and TNF levels increased markedly, and twelve months after starting treatment, the IFN-γ and TNF levels decreased greatly. In the serum, just before treatment, increases in IFN-γ and TNF levels and the IFN-γ/IL-10 ratio were evident compared with those measured one year before relapse. CONCLUSIONS Cytokine profiling using culture supernatants and serum samples may be useful for the diagnosis of relapsed PB leprosy.
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Affiliation(s)
- Tomoyuki Sameshima
- National Sanatorium Hoshizuka Keiaien, 4204 Hoshizuka-cho, Kanoya, Kagoshima, Japan.
| | - Yumi Maeda
- Leprosy Research Center, National Institute of Infectious Diseases, 4-2-1 Aoba-cho, Higashimurayama, Tokyo, Japan
| | - Tetsu Mukai
- Leprosy Research Center, National Institute of Infectious Diseases, 4-2-1 Aoba-cho, Higashimurayama, Tokyo, Japan
| | - Masamichi Goto
- National Hospital Organization Kagoshima Medical Center, 8-1 Shiroyama-cho, Kagoshima, Kagoshima, Japan
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5
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Locally-secreted interleukin-6 is related with radiological severity in smear-negative pulmonary tuberculosis. Cytokine 2020; 127:154950. [DOI: 10.1016/j.cyto.2019.154950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 11/20/2019] [Accepted: 12/03/2019] [Indexed: 01/09/2023]
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Tenorio-Borroto E, Castañedo N, García-Mera X, Rivadeneira K, Vázquez Chagoyán JC, Barbabosa Pliego A, Munteanu CR, González-Díaz H. Perturbation Theory Machine Learning Modeling of Immunotoxicity for Drugs Targeting Inflammatory Cytokines and Study of the Antimicrobial G1 Using Cytometric Bead Arrays. Chem Res Toxicol 2019; 32:1811-1823. [PMID: 31327231 DOI: 10.1021/acs.chemrestox.9b00154] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
ChEMBL biological activities prediction for 1-5-bromofur-2-il-2-bromo-2-nitroethene (G1) is a difficult task for cytokine immunotoxicity. The current study presents experimental results for G1 interaction with mouse Th1/Th2 and pro-inflammatory cytokines using a cytometry bead array (CBA). In the in vitro test of CBA, the results show no significant differences between the mean values of the Th1/Th2 cytokines for the samples treated with G1 with respect to the negative control, but there are moderate differences for cytokine values between different periods (24/48 h). The experiments show no significant differences between the mean values of the pro-inflammatory cytokines for the samples treated with G1, regarding the negative control, except for the values of tumor necrosis factor (TNF) and Interleukin (IL6) between the group treated with G1 and the negative control at 48 h. Differences occur for these cytokines in the periods (24/48 h). The study confirmed that the antimicrobial G1 did not alter the Th1/Th2 cytokines concentration in vitro in different periods, but it can alter TNF and IL6. G1 promotes free radicals production and activates damage processes in macrophages culture. In order to predict all ChEMBL activities for drugs in other experimental conditions, a ChEMBL data set was constructed using 25 biological activities, 1366 assays, 2 assay types, 4 assay organisms, 2 organisms, and 12 cytokine targets. Molecular descriptors calculated with Rcpi and 15 machine learning methods were used to find the best model able to predict if a drug could be active or not against a specific cytokine, in specific experimental conditions. The best model is based on 120 selected molecular descriptors and a deep neural network with area under the curve of the receiver operating characteristic of 0.904 and accuracy of 0.832. This model predicted 1384 G1 biological activities against cytokines in all ChEMBL data set experimental conditions.
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Affiliation(s)
- Esvieta Tenorio-Borroto
- Department of Organic Chemistry, Faculty of Pharmacy , University of Santiago de Compostela , 15782 Santiago de Compostela , Spain.,Center for Research and Advanced Studies in Animal Health, Faculty of Veterinary Medicines and Animal Husbandry , Autonomous University of Mexico State (UAEM) , 50200 Toluca , México
| | - Nilo Castañedo
- Chemical Bioactive Center (CBQ) , Central University of Las Villas (UCLV) , 50100 Santa Clara , Cuba
| | - Xerardo García-Mera
- Department of Organic Chemistry, Faculty of Pharmacy , University of Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Kenneth Rivadeneira
- RNASA-IMEDIR, Computer Science Faculty , University of A Coruna (UDC) , 15071 A Coruña , Spain
| | - Juan Carlos Vázquez Chagoyán
- Center for Research and Advanced Studies in Animal Health, Faculty of Veterinary Medicines and Animal Husbandry , Autonomous University of Mexico State (UAEM) , 50200 Toluca , México
| | - Alberto Barbabosa Pliego
- Center for Research and Advanced Studies in Animal Health, Faculty of Veterinary Medicines and Animal Husbandry , Autonomous University of Mexico State (UAEM) , 50200 Toluca , México
| | - Cristian R Munteanu
- RNASA-IMEDIR, Computer Science Faculty , University of A Coruna (UDC) , 15071 A Coruña , Spain.,Biomedical Research Institute of A Coruña (INIBIC) , University Hospital Complex of A Coruña (CHUAC) , 15006 A Coruña , Spain
| | - Humbert González-Díaz
- Department of Organic Chemistry II , University of the Basque Country UPV/EHU , 48940 Leioa , Spain.,IKERBASQUE , Basque Foundation for Science , 48011 Bilbao , Spain
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Perdomo-Celis F, Romero F, Salgado DM, Vega R, Rodríguez J, Angel J, Franco MA, Greenberg HB, Narváez CF. Identification and Characterization at the Single-Cell Level of Cytokine-Producing Circulating Cells in Children With Dengue. J Infect Dis 2019; 217:1472-1480. [PMID: 29390091 DOI: 10.1093/infdis/jiy053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/22/2018] [Indexed: 01/10/2023] Open
Abstract
In this study, we identified, at the single-cell level, naturally induced cytokine-producing circulating cells (CPCCs) in children with dengue virus (DENV) infection ranging clinically from mild to severe disease. Tumor necrosis factor alpha (TNF-α) and interleukin 6 (IL-6) CPCCs were detected in children with primary or secondary acute dengue virus (DENV) infection, and the pattern of these cytokines was similar to that seen in the supernatant of cultured peripheral blood mononuclear cells and partially comparable to that found in plasma. Monocytes, B cells, and myeloid dendritic cells (mDCs) were the primary CPCCs detected, and the frequency of mDCs was significantly higher in severe disease. B cells isolated from children with dengue spontaneously secreted TNF-α, IL-6, and interleukin 10, and supernatants from cultures of purified B cells induced activation of allogeneic T cells, supporting an antibody-independent function of these cells during DENV infection. Thus, CPCCs could be a new immune parameter with potential use to evaluate pathogenesis in this infection.
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Affiliation(s)
| | - Felipe Romero
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva.,Departamento de Pediatría, Hospital Universitario de Neiva, Bogotá, Colombia
| | - Doris M Salgado
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva.,Departamento de Pediatría, Hospital Universitario de Neiva, Bogotá, Colombia
| | - Rocío Vega
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva.,Departamento de Pediatría, Hospital Universitario de Neiva, Bogotá, Colombia
| | - Jairo Rodríguez
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva.,Departamento de Pediatría, Hospital Universitario de Neiva, Bogotá, Colombia
| | - Juana Angel
- Instituto de Genética Humana, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Manuel A Franco
- Instituto de Genética Humana, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Harry B Greenberg
- Department of Medicine and Department of Microbiology and Immunology, Stanford University School of Medicine, California
| | - Carlos F Narváez
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva
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Hu H, Pan D, Xue H, Zhang M, Zhang Y, Shen Y. A photoelectrochemical immunoassay for tumor necrosis factor-α using a GO-PTCNH2 nanohybrid as a probe. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.07.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Woodland DL. Three Reviews Highlight Different Aspects of the Host Response to Viral Infection. Viral Immunol 2017; 30:1-2. [DOI: 10.1089/vim.2016.29015.dlw] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- David L. Woodland
- Keystone Symposia on Molecular and Cellular Biology, Silverthorne, Colorado
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