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Pancaro A, Szymonik M, Perez Schmidt P, Erol G, Garcia Barrientos A, Polito L, Gobbi M, Duwé S, Hendrix J, Nelissen I. A Nanoplasmonic Assay for Point-of-Care Detection of Mannose-Binding Lectin in Human Serum. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38806166 DOI: 10.1021/acsami.4c04018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Mannose-binding lectin (MBL) activates the complement system lectin pathway and subsequent inflammatory mechanisms. The incidence and outcome of many human diseases, such as brain ischemia and infections, are associated with and influenced by the activity and serum concentrations of MBL in body fluids. To quantify MBL levels, tests based on ELISA are used, requiring several incubation and washing steps and lengthy turnaround times. Here, we aimed to develop a nanoplasmonic assay for direct MBL detection in human serum at the point of care. Our assay is based on gold nanorods (GNRs) functionalized with mannose (Man-GNRs) via an amphiphilic linker. We experimentally determined the effective amount of sugar linked to the nanorods' surface, resulting in an approximate grafting density of 4 molecules per nm2, and an average number of 11 to 13 MBL molecules binding to a single nanoparticle. The optimal Man-GNRs concentration to achieve the highest sensitivity in MBL detection was 15 μg·mL-1. The specificity of the assay for MBL detection both in simple buffer and in complex pooled human sera was confirmed. Our label-free biosensor is able to detect MBL concentrations as low as 160 ng·mL-1 within 15 min directly in human serum via a one-step reaction and by using a microplate reader. Hence, it forms the basis for a fast, noninvasive, point-of-care assay for diagnostic indications and monitoring of disease and therapy.
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Affiliation(s)
- Alessia Pancaro
- Health Unit, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol 2400, Belgium
- Dynamic Bioimaging Lab, Biomedical Research Institute, Hasselt University, Agoralaan C, Diepenbeek 3590, Belgium
| | - Michal Szymonik
- Health Unit, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol 2400, Belgium
| | - Patricia Perez Schmidt
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", SCITEC-CNR, G, Fantoli 16/15, Milan 20138, Italy
| | - Gizem Erol
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Mario Negri 2 20156, Milan, Italy
| | | | - Laura Polito
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", SCITEC-CNR, G, Fantoli 16/15, Milan 20138, Italy
| | - Marco Gobbi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Mario Negri 2 20156, Milan, Italy
| | - Sam Duwé
- Advanced Optical Microscopy Centre, Biomedical Research Institute, Hasselt University, Agoralaan C, Diepenbeek 3590, Belgium
| | - Jelle Hendrix
- Dynamic Bioimaging Lab, Biomedical Research Institute, Hasselt University, Agoralaan C, Diepenbeek 3590, Belgium
- Advanced Optical Microscopy Centre, Biomedical Research Institute, Hasselt University, Agoralaan C, Diepenbeek 3590, Belgium
| | - Inge Nelissen
- Health Unit, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol 2400, Belgium
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Altered Transcriptional Regulation of Glycolysis in Circulating CD8+ T Cells of Rheumatoid Arthritis Patients. Genes (Basel) 2022; 13:genes13071216. [PMID: 35886000 PMCID: PMC9323564 DOI: 10.3390/genes13071216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 12/04/2022] Open
Abstract
Peripheral T lymphocytes of rheumatoid arthritis (RA) patients show pathological changes in their metabolic pathways, especially glycolysis. These changes may drive the increased proliferation and tissue invasiveness of RA T cells. In order to study the transcriptional regulation underlying these alterations, we analysed publicly available RNA sequencing data from circulating T lymphocyte subsets of healthy individuals, untreated RA patients, and patients undergoing treatment for RA. Differential co-expression networks were created using sample-wise edge weights from an analysis called “linear interpolation to obtain network estimates for single sample” (lionessR), and annotated using the Gene Transcription Regulation Database (GTRD). Genes with high centrality scores were identified. CD8+ effector memory cells (Tem) and CD8+CD45RA+ effector memory cells (Temra) showed large changes in the transcriptional regulation of glycolysis in untreated RA. PFKFB3 and GAPDH were differentially regulated and had high centrality scores in CD8+ Tem cells. PFKFB3 downregulation may be due to HIF1A post transcriptional inhibition. Tocilizumab treatment partially reversed the RA-associated differential expression of several metabolic and regulatory genes. MYC was upregulated and had high centrality scores in RA CD8+ Temra cells; however, its glycolysis targets were unaltered. The upregulation of the PI3K-AKT and mTOR pathways may explain MYC upregulation.
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Xu J, Chen G, Yan Z, Qiu M, Tong W, Zhang X, Zhang L, Zhu Y, Liu K. Effect of mannose-binding lectin gene polymorphisms on the risk of rheumatoid arthritis: Evidence from a meta-analysis. Int J Rheum Dis 2021; 24:300-313. [PMID: 33458965 PMCID: PMC7986746 DOI: 10.1111/1756-185x.14060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/25/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND The effect of mannose-binding lectin (MBL) gene polymorphisms on susceptibility of rheumatoid arthritis (RA) were evaluated in ethnically different populations, whereas the results were always inconsistent. MATERIALS AND METHODS Fourteen articles involving 36 datasets were recruited to evaluate the association between MBL gene polymorphisms and rheumatoid arthritis in a meta-analysis. The random or fixed effect models were used to evaluate the pooled odds ratios (ORs) and their corresponding 95% confidence intervals (CIs). RESULTS Stratified analysis by ethnicities was conducted and the result revealed that rs1800450 (T vs C, OR = 1.32, 95% CI: 1.04-1.67, P < .05) and MBL-A/O (T vs C, OR = 1.20, 95% CI: 1.08-1.34, P < .001) were strongly associated with RA in Brazilian populations. In addition, the significant relationship between rs11003125 (T vs C, OR = 1.16, 95% CI: 1.06-1.26, P < .05) with RA were also observed in East Asian populations. Meanwhile, the inverse associations between rs5030737 with RA in East Asians and rs1800450 with RA in Indians were acquired. However, no association between any MBL polymorphism with RA susceptibility was confirmed in Caucasians. CONCLUSIONS The structural polymorphisms in exon 1 of MBL gene may significantly contribute to susceptibility and development of RA in Brazilian and Indian populations, whereas the functional polymorphisms in the promoter region were more likely to associate with RA in East Asians.
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Affiliation(s)
- Jinjian Xu
- School of Public HealthSun Yat‐Sen UniversityGuangzhouChina
- Department of Epidemiology and BiostatisticsSchool of Public HealthZhejiang UniversityHangzhouChina
| | - Gang Chen
- Affiliated Dongtai Hospital of Nantong UniversityDongtaiChina
| | - Zhen Yan
- Gaoxin Hospital of The First Affiliated Hospital of Nanchang UniversityNanchangChina
| | - Mochang Qiu
- Department of Clinical MedicineJiangxi Medical CollegeShangraoChina
| | - Wentao Tong
- Jingdezheng NO.1 People’s HospitalJingdezhenChina
| | | | - Li Zhang
- Department of Clinical MedicineJiangxi Medical CollegeShangraoChina
| | - Yimin Zhu
- Department of Epidemiology and BiostatisticsSchool of Public HealthZhejiang UniversityHangzhouChina
| | - Keqi Liu
- Department of Clinical MedicineJiangxi Medical CollegeShangraoChina
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