1
|
Shakouri SK, Dolatkhah N, Omidbakhsh S, Pishgahi A, Hashemian M. Serum inflammatory and oxidative stress biomarkers levels are associated with pain intensity, pressure pain threshold and quality of life in myofascial pain syndrome. BMC Res Notes 2020; 13:510. [PMID: 33160410 PMCID: PMC7648320 DOI: 10.1186/s13104-020-05352-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/23/2020] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES We aimed to determine the serum concentrations of some inflammatory and oxidative stress biomarkers in relation with pain intensity and quality of life in patients with myofascial pain syndrome (MPS) compared to healthy controls. This study is a case-control study. The participants were selected from MPS patients who referred to rehabilitation outpatient clinics of the Tabriz University of Medical Sciences, Iran. RESULTS Serum hs-CRP (4.68 ± 4.36 vs. 2.92 ± 4.55 g/mlµ respectively, p = 0.011), phospholipase A2 (PLA2) (6.81 ± 2.22 vs. 4.73 ± 2.97 pg/ml respectively, p < 0.001) and malondialdehyde (MDA) (2.63 ± 0.71 vs. 1.98 ± 0.90 nmol/ml respectively, p < 0.001) levels were significantly higher and serum total antioxidant capacity (TAC) (2.46 ± 0.49 vs. 2.83 ± 0.82 mmol/L respectively, p = 0.011) and superoxide dismutase (SOD) (78.89 ± 37.93 vs. 154.25 ± 115.93 U/ml respectively, p < 0.001) levels were significantly lower in the MPS patients compared to healthy controls. Serum high-sensitivity C-reactive protein (hs-CRP) level was significantly and positively associated with resting (r = 0.349, p = 0.019), activity (r = 0.295, p = 0.049) and night pain (r = 0.304, p = 0.043) intensities, pressure pain threshold (PPT) (r = 0.210, p = 0.047) and pain duration (r = 0.283, p = 0.007). Serum TAC level was significantly and negatively associated with resting pain intensity (r = -0.312, p = 0.037). Some scales and subscales of quality of life were positively correlated with serum TAC level and negatively associated with serum hs-CRP and PLA2 levels.
Collapse
Affiliation(s)
- Seyed Kazem Shakouri
- Physical Medicine and Rehabilitation Research Center, Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Neda Dolatkhah
- Physical Medicine and Rehabilitation Research Center, Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran. .,Physical Medicine and Rehabilitation Research Center, Emam Reza Hospital, Golgasht, Azadi Ave, Tabriz, Iran.
| | - Sepideh Omidbakhsh
- Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Pishgahi
- Physical Medicine and Rehabilitation Research Center, Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Hashemian
- Department of Biology, School of Art and Science, Utica College, Utica, NY, USA
| |
Collapse
|
2
|
Ziegler L, Gajulapuri A, Frumento P, Bonomi A, Wallén H, de Faire U, Rose-John S, Gigante B. Interleukin 6 trans-signalling and risk of future cardiovascular events. Cardiovasc Res 2020; 115:213-221. [PMID: 30052808 DOI: 10.1093/cvr/cvy191] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 07/20/2018] [Indexed: 12/17/2022] Open
Abstract
Aims The pro-inflammatory response to interleukin 6 (IL6) trans-signalling in atherosclerosis is driven by the IL6 and soluble IL6 receptor (sIL6R) binary complex. The binary IL6:sIL6R complex is inactivated by sgp130 through the formation of the ternary IL6:sIL6R:sgp130 complex. The aim of this study was to investigate if IL6 trans-signalling, estimated by a ratio between the binary and ternary complexes, associates with the risk of future cardiovascular events (CVE) in a Swedish cohort of 60-year-old men and women (n = 4232). Methods and results Binary and ternary complex levels expressed in nanomol/Litre were derived from serum concentrations of IL6, sIL6R, and sgp130. Cox regression models were used to assess the risk of CVE (myocardial infarction, angina pectoris, and ischaemic stroke, n = 525), expressed as hazard ratio (HR) with 95% confidence interval (CI), associated with increasing circulating levels of the three molecules and with the binary/ternary complex ratio. Estimates were adjusted for the common cardiovascular (CV) risk factors. To assess the level of IL6-trans-signalling, we estimated the binary/ternary complex ratio and then analysed the association with CVE risk. A ratio higher than the median, representing a relative excess of the active binary complex was associated with increased CVE risk (adjusted HR 1.44, 95% CI 1.21-1.72). Conclusion The ratio between the functional moieties of IL6 trans-signalling, IL6:sIL6R, and IL6:sIL6R:sgp130, was associated with CVE risk indicating that it could be a promising marker of CV risk and possibly be used in selecting patients for anti-inflammatory therapy.
Collapse
Affiliation(s)
- Louise Ziegler
- Department of Clinical Science, Danderyd Hospital, S-182 88 Stockholm, Sweden
| | - Ashwini Gajulapuri
- Swetox, Academic Research Center for Chemicals, Health and Environment, Södertälje, Sweden
| | - Paolo Frumento
- Unit of Biostatistics at the Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Alice Bonomi
- Unit of Biostatistics, Centro Cardiologico Monzino, IRCCS, Milan, Italy.,Unit of Cardiovascular Epidemiology, Karolinska Institutet, Stockholm, Sweden
| | - Håkan Wallén
- Department of Clinical Science, Danderyd Hospital, S-182 88 Stockholm, Sweden
| | - Ulf de Faire
- Unit of Cardiovascular Epidemiology, Karolinska Institutet, Stockholm, Sweden
| | - Stefan Rose-John
- Department of Biochemistry, Christian-Albrechts-University, Kiel, Germany
| | - Bruna Gigante
- Department of Clinical Science, Danderyd Hospital, S-182 88 Stockholm, Sweden.,Unit of Cardiovascular Epidemiology, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
3
|
Parsa SF, Vafajoo A, Rostami A, Salarian R, Rabiee M, Rabiee N, Rabiee G, Tahriri M, Yadegari A, Vashaee D, Tayebi L, Hamblin MR. Early diagnosis of disease using microbead array technology: A review. Anal Chim Acta 2018; 1032:1-17. [PMID: 30143206 PMCID: PMC6152944 DOI: 10.1016/j.aca.2018.05.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 04/30/2018] [Accepted: 05/02/2018] [Indexed: 12/31/2022]
Abstract
Early diagnosis of diseases (before they become advanced and incurable) is essential to reduce morbidity and mortality rates. With the advent of novel technologies in clinical laboratory diagnosis, microbead-based arrays have come to be recognized as an efficient approach, that demonstrates useful advantages over traditional assay methods for multiple disease-related biomarkers. Multiplexed microbead assays provide a robust, rapid, specific, and cost-effective approach for high-throughput and simultaneous screening of many different targets. Biomolecular binding interactions occur after applying a biological sample (such as blood plasma, saliva, cerebrospinal fluid etc.) containing the target analyte(s) to a set of microbeads with different ligand-specificities that have been coded in planar or suspension arrays. The ligand-receptor binding activity is tracked by optical signals generated by means of flow cytometry analysis in the case of suspension arrays, or by image processing devices in the case of planar arrays. In this review paper, we discuss diagnosis of cancer, neurological and infectious diseases by using optically-encoded microbead-based arrays (both multiplexed and single-analyte assays) as a reliable tool for detection and quantification of various analytes.
Collapse
Affiliation(s)
- Sanam Foroutan Parsa
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Atieh Vafajoo
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Azin Rostami
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Reza Salarian
- Biomedical Engineering Department, Maziar University, Noor, Royan, Iran
| | - Mohammad Rabiee
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Navid Rabiee
- Department of Chemistry, Shahid Beheshti University, Tehran, Iran
| | - Ghazal Rabiee
- Department of Chemistry, Shahid Beheshti University, Tehran, Iran
| | | | - Amir Yadegari
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - Daryoosh Vashaee
- Electrical and Computer Engineering Department, North Carolina State University, Raleigh, NC 27606, USA
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA; Biomaterials and Advanced Drug Delivery Laboratory, School of Medicine, Stanford University, Palo Alto, CA 94304, USA
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA 02115, USA; Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA 02139, USA.
| |
Collapse
|
4
|
Vafajoo A, Rostami A, Foroutan Parsa S, Salarian R, Rabiee N, Rabiee G, Rabiee M, Tahriri M, Vashaee D, Tayebi L, Hamblin MR. Multiplexed microarrays based on optically encoded microbeads. Biomed Microdevices 2018; 20:66. [PMID: 30088103 PMCID: PMC6143764 DOI: 10.1007/s10544-018-0314-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In recent years, there has been growing interest in optically-encoded or tagged functionalized microbeads as a solid support platform to capture proteins or nucleotides which may serve as biomarkers of various diseases. Multiplexing technologies (suspension array or planar array) based on optically encoded microspheres have made possible the observation of relatively minor changes in biomarkers related to specific diseases. The ability to identify these changes at an early stage may allow the diagnosis of serious diseases (e.g. cancer) at a time-point when curative treatment may still be possible. As the overall accuracy of current diagnostic methods for some diseases is often disappointing, multiplexed assays based on optically encoded microbeads could play an important role to detect biomarkers of diseases in a non-invasive and accurate manner. However, detection systems based on functionalized encoded microbeads are still an emerging technology, and more research needs to be done in the future. This review paper is a preliminary attempt to summarize the state-of-the-art concerning diagnostic microbeads; including microsphere composition, synthesis, encoding technology, detection systems, and applications.
Collapse
Affiliation(s)
- Atieh Vafajoo
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Azin Rostami
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Sanam Foroutan Parsa
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Reza Salarian
- Biomedical Engineering Department, Maziar University, Royan, Noor, Iran
| | - Navid Rabiee
- Department of Chemistry, Shahid Beheshti University, Tehran, Iran
| | - Ghazal Rabiee
- Department of Chemistry, Shahid Beheshti University, Tehran, Iran
| | - Mohammad Rabiee
- Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | | | - Daryoosh Vashaee
- Electrical and Computer Engineering Department, North Carolina State University, Raleigh, NC, 27606, USA
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI, 53233, USA
- Biomaterials and Advanced Drug Delivery Laboratory, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA.
- Department of Dermatology, Harvard Medical School, Boston, MA, 02115, USA.
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, 02139, USA.
| |
Collapse
|
5
|
Tsai MZ, Hsiung CT, Chen Y, Huang CS, Hsu HY, Hsieh PY. Real-time CRP detection from whole blood using micropost-embedded microfluidic chip incorporated with label-free biosensor. Analyst 2018; 143:503-510. [DOI: 10.1039/c7an01374d] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate the detection of C-creative protein (CRP) from whole blood samples without sample pretreatment by using a lab-on-a-chip system consisting of a microfluidic chip and a label-free biosensor.
Collapse
Affiliation(s)
- Meng-Zhe Tsai
- Department of Mechanical Engineering
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
| | - Chan-Te Hsiung
- Department of Mechanical Engineering
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
| | - Yang Chen
- Department of Mechanical Engineering
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
| | - Cheng-Sheng Huang
- Department of Mechanical Engineering
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
| | - Hsin-Yun Hsu
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
| | - Pei-Ying Hsieh
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
| |
Collapse
|
6
|
Medium Cut-Off (MCO) Membranes Reduce Inflammation in Chronic Dialysis Patients-A Randomized Controlled Clinical Trial. PLoS One 2017; 12:e0169024. [PMID: 28085888 PMCID: PMC5234772 DOI: 10.1371/journal.pone.0169024] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 12/08/2016] [Indexed: 11/26/2022] Open
Abstract
Background To increase the removal of middle-sized uremic toxins a new membrane with enhanced permeability and selectivity, called Medium Cut-Off membrane (MCO-Ci) has been developed that at the same time ensures the retention of albumin. Because many middle-sized substances may contribute to micro-inflammation we hypothesized that the use of MCO-Ci influences the inflammatory state in hemodialysis patients. Methods The randomized crossover trial in 48 patients compared MCO-Ci dialysis to High-flux dialysis of 4 weeks duration each plus 8 weeks extension phase. Primary endpoint was the gene expression of TNF-α and IL-6 in peripheral blood mononuclear cells (PBMCs), secondary endpoints were plasma levels of specified inflammatory mediators and cytokines. Results After four weeks of MCO-Ci the expression of TNF-α mRNA (Relative quantification (RQ) from 0.92 ± 0.34 to 0.75 ± 0.31, -18.5%, p<0.001)-α and IL-6 mRNA (RQ from 0.78 ± 0.80 to 0.60 ± 0.43, -23.1%, p<0.01) was reduced to a significantly greater extent than with High-flux dialyzers (TNF mRNA-RQ: -14.3%; IL-6 mRNA-RQ: -3.5%). After retransformation of logarithmically transformed data, measurements after MCO were reduced to 82% of those after HF (95% CI 74%–91%). 4 weeks use of MCO-Ci resulted in long-lasting change in plasma levels of several cytokines and other substances with a significant decrease for sTNFR1, kappa and lambda free light chains, urea and an increase for Lp-PLA2 (PLA2G7) compared to High-flux. Albumin levels dropped significantly after 4 weeks of MCO dialysis but increased after additional 8 weeks of MCO dialysis. Twelve weeks treatment with MCO-Ci was well tolerated regarding the number of (S)AEs. In the extension period levels of CRP, TNF-α-mRNA and IL-6 mRNA remained stable in High-flux as well as in MCO-Ci. Conclusions MCO-Ci dialyzers modulate inflammation in chronic HD patients to a greater extent compared to High-flux dialyzers. Transcription of pro-inflammatory cytokines in peripheral leukocytes is markedly reduced and removal of soluble mediators is enhanced with MCO dialysis. Serum albumin concentrations stabilize after an initial drop. These results encourage further trials with longer treatment periods and clinical endpoints.
Collapse
|
7
|
Huang CH, Tsai MS, Chien KL, Chang WT, Wang TD, Chen SC, Ma MHM, Hsu HY, Chen WJ. Predicting the outcomes for out-of-hospital cardiac arrest patients using multiple biomarkers and suspension microarray assays. Sci Rep 2016; 6:27187. [PMID: 27256246 PMCID: PMC4891702 DOI: 10.1038/srep27187] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 05/16/2016] [Indexed: 12/31/2022] Open
Abstract
Predicting the prognosis for cardiac arrest is still challenging. Combining biomarkers from diverse pathophysiological pathways may provide reliable indicators for the severity of injury and predictors of long-term outcomes. We investigated the feasibility of using a multimarker strategy with key independent biomarkers to improve the prediction of outcomes in cardiac arrest. Adult out-of-hospital cardiac arrest patients with sustained return of spontaneous circulation were prospectively enrolled in this study. Blood samples were taken at 2 and 24 hours after cardiac arrest. Suspension microarray assays were used to test 21 different biomarkers. A total of 99 patients were enrolled, 45 of whom survived to hospital discharge. We identified 11 biomarkers that, when combined with clinical variables and factors of APACHE II score and history of arrhythmia, were independent determinants for outcome of in-hospital mortality (concordance = 0.9249, standard error = 0.0779). Three biomarkers combined with APACHE II and age were independent determinants for favorable neurological outcome at hospital discharge (area under the receiver-operator characteristic curve, 0.938; 95% confidence interval, 0.854 ~ 1.0). In conclusion, a systemic multiple biomarker approach using suspension microarray assays can identify independent predictors and model the outcomes of cardiac arrest patients during the post-cardiac arrest period.
Collapse
Affiliation(s)
- Chien-Hua Huang
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan.,Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan
| | - Min-Shan Tsai
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan
| | - Kuo-Liong Chien
- Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan
| | - Wei-Tien Chang
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan
| | - Tzung-Dau Wang
- Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan
| | - Shyr-Chyr Chen
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan
| | - Matthew Huei-Ming Ma
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan
| | - Hsin-Yun Hsu
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao-Tung University, Hsinchu, Taiwan
| | - Wen-Jone Chen
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University Medical College, Taipei, Taiwan.,Division of Cardiology, Department of Internal Medicine, Lotung Poh-Ai Hospital, Yilan County, Taiwan
| |
Collapse
|
8
|
Wardecki T, Werner P, Thomas M, Templin MF, Schmidt G, Brandner JM, Merfort I. Influence of Birch Bark Triterpenes on Keratinocytes and Fibroblasts from Diabetic and Nondiabetic Donors. JOURNAL OF NATURAL PRODUCTS 2016; 79:1112-1123. [PMID: 27002382 DOI: 10.1021/acs.jnatprod.6b00027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Impaired wound healing is one of the main risk factors associated with diabetes mellitus. Few options are available to treat diabetic wounds, and therefore efficient remedies are urgently needed. An interesting option might be an extract of birch bark (TE) that has been clinically proven to accelerate acute wound healing. We investigated the effects of TE and its main components betulin and lupeol in cultured normal keratinocytes and dermal fibroblasts from diabetic and nondiabetic donors. These in vitro models can provide insights into possible beneficial effects in wound healing. TE and betulin treatment led to increased mRNA levels of chemokines, pro-inflammatory cytokines, and mediators important in wound healing, e.g., IL-6, TNFα, IL-8, and RANTES. We observed a pronounced upregulation of MIF, IL-8, and RANTES on the protein level. Furthermore, a shape change of the actin cytoskeleton was seen in keratinocytes and fibroblasts, and the Rho-GTPases and p38-MAPK were found to be activated in keratinocytes. On the basis of our results, TE is worthy of further study as a potential option to influence wound-healing processes under diabetic conditions. These first insights need to be confirmed by clinical studies with diabetic patients.
Collapse
Affiliation(s)
| | | | - Maria Thomas
- Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen , Tübingen, Germany
| | - Markus F Templin
- Institute of Natural and Medical Sciences at the University of Tübingen , Reutlingen, Germany
| | | | - Johanna M Brandner
- Department of Dermatology and Venerology, University Hospital Hamburg-Eppendorf , Hamburg, Germany
| | | |
Collapse
|
9
|
Girndt M, Fiedler R, Martus P, Pawlak M, Storr M, Bohler T, Glomb MA, Liehr K, Henning C, Templin M, Trojanowicz B, Ulrich C, Werner K, Zickler D, Schindler R. High cut-off dialysis in chronic haemodialysis patients. Eur J Clin Invest 2015; 45:1333-40. [PMID: 26519693 DOI: 10.1111/eci.12559] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 10/26/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND Haemodialysis patients suffer from chronic systemic inflammation and high incidence of cardiovascular disease. One cause for this may be the failure of diseased kidneys to eliminate immune mediators. Current haemodialysis treatment achieves insufficient elimination of proteins in the molecular weight range 15-45 kD. Thus, high cut-off dialysis might improve the inflammatory state. DESIGN In this randomized crossover trial, 43 haemodialysis patients were treated for 3 weeks with high cut-off or high-flux dialysis. Inflammatory plasma mediators, monocyte subpopulation distribution and leucocyte gene expression were quantified. RESULTS High cut-off dialysis supplemented by a low-flux filter did not influence the primary end-point, expression density of CD162 on monocytes. Nevertheless, treatment reduced multiple immune mediators in plasma. Such reduction proved - at least for some markers - to be a sustained effect over the interdialytic interval. Thus, for example, soluble TNF-receptor 1 concentration predialysis was reduced from median 13·3 (IQR 8·9-17·2) to 9·7 (IQR 7·5-13·2) ng/mL with high cut-off while remaining constant with high-flux treatment. The expression profile of multiple proinflammatory genes in leucocytes was significantly dampened. Treatment was well tolerated although albumin losses in high cut-off dialysis would be prohibitive against long-term use. CONCLUSIONS The study shows for the first time that a dampening effect of high cut-off dialysis on systemic inflammation is achievable. Earlier studies had failed due to short study duration or insufficient dialysis efficacy. Removal of soluble mediators from the circulation influences cellular activation levels in leucocytes. Continued development of less albumin leaky membranes with similar cytokine elimination is justified.
Collapse
Affiliation(s)
- Matthias Girndt
- Department of Internal Medicine II, Martin-Luther-University Halle, Halle, Germany
| | - Roman Fiedler
- Department of Internal Medicine II, Martin-Luther-University Halle, Halle, Germany
| | - Peter Martus
- Institute for Clinical Epidemiology and Applied Biometry, University of Tübingen, Tübingen, Germany
| | | | - Markus Storr
- Department of Research and Development, Gambro Dialysatoren GmbH, Hechingen, Germany
| | - Torsten Bohler
- Department of Research and Development, Gambro Dialysatoren GmbH, Hechingen, Germany
| | - Marcus A Glomb
- Institute for Chemistry, Food Chemistry, Martin-Luther-University Halle, Halle, Germany
| | - Kristin Liehr
- Institute for Chemistry, Food Chemistry, Martin-Luther-University Halle, Halle, Germany
| | - Christian Henning
- Institute for Chemistry, Food Chemistry, Martin-Luther-University Halle, Halle, Germany
| | | | - Bogusz Trojanowicz
- Department of Internal Medicine II, Martin-Luther-University Halle, Halle, Germany
| | - Christof Ulrich
- Department of Internal Medicine II, Martin-Luther-University Halle, Halle, Germany
| | - Kristin Werner
- Department of Research and Development, Gambro Dialysatoren GmbH, Hechingen, Germany
| | - Daniel Zickler
- Department of Nephrology and Internal Intensive Care Medicine, Charité-Universitaetsmedizin Berlin, Campus Virchow Clinic, Berlin, Germany
| | - Ralf Schindler
- Department of Nephrology and Internal Intensive Care Medicine, Charité-Universitaetsmedizin Berlin, Campus Virchow Clinic, Berlin, Germany
| |
Collapse
|
10
|
Gottheil R, Baur N, Becker H, Link G, Maier D, Schneiderhan-Marra N, Stelzle M. Moving the solid phase: a platform technology for cartridge based sandwich immunoassays. Biomed Microdevices 2013; 16:163-72. [DOI: 10.1007/s10544-013-9816-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
11
|
Browne RW, Kantarci A, LaMonte MJ, Andrews CA, Hovey KM, Falkner KL, Cekici A, Stephens D, Genco RJ, Scannapieco FA, Van Dyke TE, Wactawski-Wende J. Performance of multiplex cytokine assays in serum and saliva among community-dwelling postmenopausal women. PLoS One 2013; 8:e59498. [PMID: 23577067 PMCID: PMC3618114 DOI: 10.1371/journal.pone.0059498] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 02/14/2013] [Indexed: 11/24/2022] Open
Abstract
Multiplexing arrays increase the throughput and decrease sample requirements for studies employing multiple biomarkers. The goal of this project was to examine the performance of Multiplex arrays for measuring multiple protein biomarkers in saliva and serum. Specimens from the OsteoPerio ancillary study of the Women’s Health Initiative Observational Study were used. Participants required the presence of at least 6 teeth and were excluded based on active cancer and certain bone issues but were not selected on any specific condition. Quality control (QC) samples were created from pooled serum and saliva. Twenty protein markers were measured on five multiplexing array panels. Sample pretreatment conditions were optimized for each panel. Recovery, lower limit of quantification (LLOQ) and imprecision were determined for each analyte. Statistical adjustment at the plate level was used to reduce imprecision estimates and increase the number of usable observations. Sample pre-treatment improved recovery estimates for many analytes. The LLOQ for each analyte agreed with manufacturer specifications except for MMP-1 and MMP-2 which were significantly higher than reported. Following batch adjustment, 17 of 20 biomarkers in serum and 9 of 20 biomarkers in saliva demonstrated acceptable precision, defined as <20% coefficient of variation (<25% at LLOQ). The percentage of cohort samples having levels within the reportable range for each analyte varied from 10% to 100%. The ratio of levels in saliva to serum varied from 1∶100 to 28∶1. Correlations between saliva and serum were of moderate positive magnitude and significant for CRP, MMP-2, insulin, adiponectin, GM-CSF and IL-5. Multiplex arrays exhibit high levels of analytical imprecision, particularly at the batch level. Careful sample pre-treatment can enhance recovery and reduce imprecision. Following statistical adjustments to reduce batch effects, we identified biomarkers that are of acceptable quality in serum and to a lesser degree in saliva using Multiplex arrays.
Collapse
Affiliation(s)
- Richard W Browne
- Department of Biotechnical and Clinical Laboratory Sciences, University at Buffalo, Buffalo, New York, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Novel microfluidic platform for automated lab-on-chip testing of hypercoagulability panel. Blood Coagul Fibrinolysis 2012; 23:760-8. [DOI: 10.1097/mbc.0b013e328358e982] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
13
|
André MC, Gille C, Glemser P, Woiterski J, Hsu HY, Spring B, Keppeler H, Kramer BW, Handgretinger R, Poets CF, Lauber K, Orlikowsky TW. Bacterial reprogramming of PBMCs impairs monocyte phagocytosis and modulates adaptive T cell responses. J Leukoc Biol 2012; 91:977-89. [PMID: 22427683 DOI: 10.1189/jlb.0911474] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Septic diseases are characterized by an initial systemic, proinflammatory phase, followed by a period of anti-inflammation. In the context of the latter, monocytes have been described to display altered functions, including reduced TNF secretion and T cell-stimulating capacities in response to recall antigens. This hyporesponsiveness is supposed to be detrimental for coping with secondary infections. We here characterize bacterially reprogrammed PBMC-derived monocytes with special focus on their phagocytic activity. Hence, we have implemented a surrogate model of the early, postinflammatory period by exposing PBMCs to Escherichia coli on d0 and rechallenging them with bacteria on d2. This induced the emergence of a distinct monocytic phenotype with profound phagocytic impairments but a preserved ability for naïve T cell stimulation. The compromising effects on phagocytosis required the presence of bacteria and were not mimicked by TLR4 ligation or exposure to isolated cytokines alone. Moreover, the impairments were specific for the engulfment of bacteria and were coupled to a selective down-regulation of FcγR and SR expression. Intriguingly, this monocytic phenotype contributed to the stimulation of a T(H)17-polarized adaptive immune response in the context of secondary infection. Our findings extend the current knowledge of monocytic reprogramming and identify the phagocytic capacity of monocytes as a putative sepsis biomarker.
Collapse
Affiliation(s)
- Maya C André
- Department of Neonatology, University Children’s Hospital, Tuebingen, Germany.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Jun BH, Kang H, Lee YS, Jeong DH. Fluorescence-based multiplex protein detection using optically encoded microbeads. Molecules 2012; 17:2474-90. [PMID: 22382526 PMCID: PMC6268487 DOI: 10.3390/molecules17032474] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 02/24/2012] [Accepted: 02/24/2012] [Indexed: 01/21/2023] Open
Abstract
Potential utilization of proteins for early detection and diagnosis of various diseases has drawn considerable interest in the development of protein-based multiplex detection techniques. Among the various techniques for high-throughput protein screening, optically-encoded beads combined with fluorescence-based target monitoring have great advantages over the planar array-based multiplexing assays. This review discusses recent developments of analytical methods of screening protein molecules on microbead-based platforms. These include various strategies such as barcoded microbeads, molecular beacon-based techniques, and surface-enhanced Raman scattering-based techniques. Their applications for label-free protein detection are also addressed. Especially, the optically-encoded beads such as multilayer fluorescence beads and SERS-encoded beads are successful for generating a large number of coding.
Collapse
Affiliation(s)
- Bong-Hyun Jun
- School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747, Korea;
| | - Homan Kang
- Nano Systems Institute and Interdisciplinary Program in Nano-Science and Technology, Seoul National University, Seoul 151-747, Korea
| | - Yoon-Sik Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747, Korea;
- Nano Systems Institute and Interdisciplinary Program in Nano-Science and Technology, Seoul National University, Seoul 151-747, Korea
| | - Dae Hong Jeong
- Nano Systems Institute and Interdisciplinary Program in Nano-Science and Technology, Seoul National University, Seoul 151-747, Korea
- Department of Chemistry Education, Seoul National University, Seoul 151-747, Korea
| |
Collapse
|
15
|
Response patterns of cytokines/chemokines in two murine strains after irradiation. Cytokine 2012; 58:169-77. [PMID: 22277799 DOI: 10.1016/j.cyto.2011.12.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 11/17/2011] [Accepted: 12/22/2011] [Indexed: 11/23/2022]
Abstract
PURPOSE To determine the plasma concentrations of acute responding cytokines/chemokines following 9-Gy ionizing radiation in C57BL/6 (radiation tolerant) and C3H/HeN (radiation sensitive) murine strains. METHODS AND MATERIALS Mice (5/group) received 9-Gy total body irradiation (TBI), and the plasma from each mouse was collected at 6h or 1, 2, 4, or 10 days after TBI. A multiplex bead array was used to assess the levels of 32 cytokines/chemokines in plasma to determine their common and strain-specific temporal responses. RESULTS The plasma levels of five cytokines/chemokines (Axl, FasL, ICAM-1, TARC, and TSLP) were beyond the detectable level. Five (VEGF, IL-2, IL-5, IL-17, and CD30) were unaffected by irradiation in either strain. Temporal patterns were similar in both murine strains for 10 of the cytokines tested, including G-CSF, IL-6, TCA-3, MCP-1, MIP-1γ, KC, CXCL 13, CXCL 16, MDC, and TIMP-1; the other 12 molecules (GM-CSF, IL-3, SCF, IL-1β, IL-4, IL-10, IL-12p70, MIP-1α, Eotaxin, TNF-α, sTNF-R1, and CD40) showed strain-specific response patterns. While a number of cytokines had temporal response patterns following TBI, the strains exhibited quantitatively different results. CONCLUSIONS The levels of 27 of the 32 plasma cytokines measured indicate the following: (1) different cytokine concentrations and temporal patterns in the two strains may partly explain different radiation sensitivities and sequelae following irradiation; (2) many of the cytokines/chemokines exhibit similar temporal responses in the two strains. These responses suggest the potential value of using a panel of cytokine/chemokine temporal patterns for radiation dosimetry. Although radiation doses will be difficult to quantitate due to the large variation in levels and temporal responses exhibited in the two murine strains, serial measurements of cytokines might help identify subjects exposed to radiation.
Collapse
|
16
|
Wang YF, Wang DN, Zou MQ, Jin Y, Yun CL, Gao XW. Application of Suspension Array for Simultaneous Detection of Antibiotic Residues in Raw Milk. ANAL LETT 2011. [DOI: 10.1080/00032719.2011.553012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
17
|
Darmanis S, Nong RY, Vänelid J, Siegbahn A, Ericsson O, Fredriksson S, Bäcklin C, Gut M, Heath S, Gut IG, Wallentin L, Gustafsson MG, Kamali-Moghaddam M, Landegren U. ProteinSeq: high-performance proteomic analyses by proximity ligation and next generation sequencing. PLoS One 2011; 6:e25583. [PMID: 21980495 PMCID: PMC3183061 DOI: 10.1371/journal.pone.0025583] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Accepted: 09/06/2011] [Indexed: 11/23/2022] Open
Abstract
Despite intense interest, methods that provide enhanced sensitivity and specificity in parallel measurements of candidate protein biomarkers in numerous samples have been lacking. We present herein a multiplex proximity ligation assay with readout via realtime PCR or DNA sequencing (ProteinSeq). We demonstrate improved sensitivity over conventional sandwich assays for simultaneous analysis of sets of 35 proteins in 5 µl of blood plasma. Importantly, we observe a minimal tendency to increased background with multiplexing, compared to a sandwich assay, suggesting that higher levels of multiplexing are possible. We used ProteinSeq to analyze proteins in plasma samples from cardiovascular disease (CVD) patient cohorts and matched controls. Three proteins, namely P-selectin, Cystatin-B and Kallikrein-6, were identified as putative diagnostic biomarkers for CVD. The latter two have not been previously reported in the literature and their potential roles must be validated in larger patient cohorts. We conclude that ProteinSeq is promising for screening large numbers of proteins and samples while the technology can provide a much-needed platform for validation of diagnostic markers in biobank samples and in clinical use.
Collapse
Affiliation(s)
- Spyros Darmanis
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Rachel Yuan Nong
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Johan Vänelid
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Agneta Siegbahn
- Department of Medical Sciences, Clinical Chemistry, University Hospital, Uppsala, Sweden
| | | | | | - Christofer Bäcklin
- Cancer Pharmacology and Informatics, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Marta Gut
- Centro Nacional de Análisis Genómico, Barcelona, Spain
| | - Simon Heath
- Centro Nacional de Análisis Genómico, Barcelona, Spain
| | | | - Lars Wallentin
- Department of Medical Sciences, Clinical Chemistry, University Hospital, Uppsala, Sweden
| | - Mats G. Gustafsson
- Cancer Pharmacology and Informatics, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Masood Kamali-Moghaddam
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Ulf Landegren
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
- * E-mail:
| |
Collapse
|
18
|
Vaickus LJ, Bouchard J, Kim J, Natarajan S, Remick DG. Assessing pulmonary pathology by detailed examination of respiratory function. THE AMERICAN JOURNAL OF PATHOLOGY 2010; 177:1861-9. [PMID: 20724595 PMCID: PMC2947281 DOI: 10.2353/ajpath.2010.100053] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/18/2010] [Indexed: 12/12/2022]
Abstract
Pulmonary inflammation causes multiple alterations within the lung, including mucus production, recruitment of inflammatory cells, and airway hyperreactivity (AHR). Measurement of AHR by direct, invasive means (eg, mechanical ventilation) or noninvasive techniques, like whole body plethysmography (WBP), assesses the severity of pulmonary inflammation in animal models of inflammatory lung disease. Direct measurement of AHR is acknowledged as the most accurate method for assessing airway mechanics, but analysis of all data obtained from WBP may offer insights into which inflammatory aspects of the lung are altered along with AHR. Using WBP, we compared the respiratory parameters of two groups of mice sensitized with cockroach allergen. One group was treated with dexamethasone (Dex) before final challenge (Dex-Asthma), while the other group received vehicle treatment (Asthma). Respiratory parameters from plethysmography revealed that Dex-Asthma mice compensated to maintain high minute ventilation, whereas Asthma mice showed significant impairment in minute ventilation despite increased peak expiratory flow (103 ± 5 ml/min vs. 69 ± 70 ml/min). The WBP data suggest that enhanced air exchange in the Dex-Asthma mice results from significant decreases in airway mucus production. Additional studies with quantitative morphometry of histological sections confirmed that Dex reduced airway mucus. In conclusion, a detailed examination of WBP parameters can accurately assess the respiratory health of mice and will help direct additional studies.
Collapse
Affiliation(s)
| | | | | | | | - Daniel G. Remick
- Department of Pathology, Boston University School of Medicine, Boston, Massachusetts
| |
Collapse
|
19
|
µFBI: a microfluidic bead-based immunoassay for multiplexed detection of proteins from a µL sample volume. PLoS One 2010; 5. [PMID: 20957050 PMCID: PMC2948516 DOI: 10.1371/journal.pone.0013125] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Accepted: 08/23/2010] [Indexed: 12/13/2022] Open
Abstract
Background Over the last ten years, miniaturized multiplexed immunoassays have become robust, reliable research tools that enable researchers to simultaneously determine a multitude of parameters. Among the numerous analytical protein arrays available, bead-based assay systems have evolved into a key technology that enables the quantitative protein profiling of biological samples whilst requiring only a minimal amount of sample material. Methodology/Principal Findings A microfluidic bead-based immunoassay, µFBI, was developed to perform bead-based multiplexed sandwich immunoassays in a capillary. This setup allows the simultaneous detection of several parameters and only requires 200 ng of tissue lysate in a 1 µL assay volume. In addition, only 1 µL of detection antibodies and 1 µL of the reporter molecule Streptavidin-Phycoerythrin were required. The µFBI was used to compare the expression of seven receptor tyrosine kinases and their degree of tyrosine phosphorylation in breast cancer tissue and in normal tissue lysates. The total amount of HER-2, as well the degree of tyrosine phosphorylation was much higher in breast cancer tissue than in normal tissue. µFBI and a standard bead-based assay led to identical protein expression data. Moreover, it was possible to reduce the quantity of sample material required by a factor of 100 and the quantity of reagents by a factor of 30. Conclusions/Significance The µFBI, microfluidic bead-based immunoassay, allows the analysis of multiple parameters from a very small amount of sample material, such as tumor biopsies or tissue sections.
Collapse
|
20
|
Poetz O, Henzler T, Hartmann M, Kazmaier C, Templin MF, Herget T, Joos TO. Sequential multiplex analyte capturing for phosphoprotein profiling. Mol Cell Proteomics 2010; 9:2474-81. [PMID: 20682761 DOI: 10.1074/mcp.m110.002709] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Microarray-based sandwich immunoassays can simultaneously detect dozens of proteins. However, their use in quantifying large numbers of proteins is hampered by cross-reactivity and incompatibilities caused by the immunoassays themselves. Sequential multiplex analyte capturing addresses these problems by repeatedly probing the same sample with different sets of antibody-coated, magnetic suspension bead arrays. As a miniaturized immunoassay format, suspension bead array-based assays fulfill the criteria of the ambient analyte theory, and our experiments reveal that the analyte concentrations are not significantly changed. The value of sequential multiplex analyte capturing was demonstrated by probing tumor cell line lysates for the abundance of seven different receptor tyrosine kinases and their degree of phosphorylation and by measuring the complex phosphorylation pattern of the epidermal growth factor receptor in the same sample from the same cavity.
Collapse
Affiliation(s)
- Oliver Poetz
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstrasse 55, Reutlingen, Germany.
| | | | | | | | | | | | | |
Collapse
|
21
|
Ellington AA, Kullo IJ, Bailey KR, Klee GG. Antibody-based protein multiplex platforms: technical and operational challenges. Clin Chem 2009; 56:186-93. [PMID: 19959625 DOI: 10.1373/clinchem.2009.127514] [Citation(s) in RCA: 211] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND The measurement of multiple protein biomarkers may refine risk stratification in clinical settings. This concept has stimulated development of multiplexed immunoassay platforms that provide multiple, parallel protein measurements on the same specimen. CONTENT We provide an overview of antibody-based multiplexed immunoassay platforms and discuss technical and operational challenges. Multiplexed immunoassays use traditional immunoassay principles in which high-affinity capture ligands are immobilized in parallel arrays in either planar format or on microspheres in suspension. Development of multiplexed immunoassays requires rigorous validation of assay configuration and analytical performance to minimize assay imprecision and inaccuracy. Challenges associated with multiplex configuration include selection and immobilization of capture ligands, calibration, interference between antibodies and proteins and assay diluents, and compatibility of assay limits of quantification. We discuss potential solutions to these challenges. Criteria for assessing analytical multiplex assay performance include the range of linearity, analytical specificity, recovery, and comparison to a quality reference method. Quality control materials are not well developed for multiplexed protein immunoassays, and algorithms for interpreting multiplex quality control data are needed. SUMMARY Technical and operational challenges have hindered implementation of multiplexed assays in clinical settings. Formal procedures that guide multiplex assay configuration, analytical validation, and quality control are needed before broad application of multiplexed arrays can occur in the in vitro diagnostic market.
Collapse
Affiliation(s)
- Allison A Ellington
- Division of Cardiovascular Diseases, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | | | | | | |
Collapse
|
22
|
Hsu HY, Joos TO, Koga H. Multiplex microsphere-based flow cytometric platforms for protein analysis and their application in clinical proteomics â from assays to results. Electrophoresis 2009; 30:4008-19. [DOI: 10.1002/elps.200900211] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
23
|
Lins RX, de Assis MC, Mallet de Lima CD, Freitas C, Maciel Plotkowski MC, Saliba AM. ExoU modulates soluble and membrane-bound ICAM-1 in Pseudomonas aeruginosa-infected endothelial cells. Microbes Infect 2009; 12:154-61. [PMID: 19931407 DOI: 10.1016/j.micinf.2009.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 09/22/2009] [Accepted: 11/10/2009] [Indexed: 01/13/2023]
Abstract
ExoU, a Pseudomonas aeruginosa cytotoxin injected via the type III secretion system into host cells, possesses eicosanoid-mediated proinflammatory properties due to its phospholipase A(2) (PLA(2)) activity. This report addressed the question whether ExoU may modulate the expression of adhesion molecules in host cells, therefore contributing to the recruitment of leukocyte into infected tissues. ExoU was shown to down-regulate membrane-bound ICAM-1 (mICAM-1) and up-regulate the release of soluble ICAM-1 (sICAM-1) from P. aeruginosa-infected endothelial cells. The modulation of ICAM-1 depended on the direct effect of the ExoU PLA(2) activity and involved the cyclooxygenase (COX) pathway. No differences in mICAM-1 and sICAM-1 mRNA levels were observed when cultures were infected with the ExoU-producing PA103 strain or the mutant PA103DeltaexoU, suggesting that ExoU may proteolytically cleave mICAM-1, producing sICAM-1 in a COX-dependent pathway.
Collapse
Affiliation(s)
- Renata Ximenes Lins
- Departamento de Microbiologia, Imunologia e Parasitologia - FCM/UERJ, Universidade do Estado do Rio de Janeiro, Av. 28 de Setembro, 87 fundos, 3 degrees andar. 20 551-030, Rio de Janeiro, RJ, Brazil
| | | | | | | | | | | |
Collapse
|
24
|
Ellington AA, Kullo IJ, Bailey KR, Klee GG. Measurement and quality control issues in multiplex protein assays: a case study. Clin Chem 2009; 55:1092-9. [PMID: 19372187 DOI: 10.1373/clinchem.2008.120717] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Multiplex arrays are increasingly used for measuring protein biomarkers. Advantages of this approach include specimen conservation, limited sample handling, and decreased time and cost, but the challenges of optimizing assay format for each protein, selecting common dilution factors, and establishing robust quality control algorithms are substantial. Here, we use measurements of 15 protein biomarkers from a large study to illustrate processing, analytic, and quality control issues with multiplexed immunoassays. METHODS We contracted with ThermoScientific for duplicate measurements of 15 proteins in 2322 participants from a community-based cohort, a plasma control, and recombinant protein controls using 2 custom planar microarrays with 6 (panel A) or 9 (panel B) capture antibodies printed in each well. We selected constituent analytes in each panel based on endogenous concentrations and assay availability. Protocols were standardized for sample processing, storage, and freeze-thaw exposures. We analyzed data for effects of deviations from processing protocols, precision, and bias. RESULTS Measurements were within reportable ranges for each of the assays; however, concentrations for 7 of the 15 proteins were not centered on the dose-response curves. An additional freeze-thaw cycle and erroneous sample dilution for a subset of samples produced significantly different results. Measurements with large differences between duplicates were seen to cluster by analyte, plate, and participant. Conventional univariate quality control algorithms rejected many plates. Plate-specific medians of cohort and plasma control data significantly covaried, an observation important for development of alternative quality control algorithms. CONCLUSIONS Multiplex measurements present difficult challenges that require further analytical and statistical developments.
Collapse
|
25
|
Sahin O, Wiemann S. Functional genomics and proteomics approaches to study the ERBB network in cancer. FEBS Lett 2009; 583:1766-71. [PMID: 19303877 DOI: 10.1016/j.febslet.2009.03.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 03/16/2009] [Accepted: 03/16/2009] [Indexed: 02/06/2023]
Abstract
Substantial progress in functional genomic and proteomic technologies has opened new perspectives in biomedical research. The sequence of the human genome has been mostly determined and opened new visions on its complexity and regulation. New technologies, like RNAi and protein arrays, allow gathering knowledge beyond single gene analysis. Increasingly, biological processes are studied with systems biological approaches, where qualitative and quantitative data of the components are utilized to model the respective processes, to predict effects of perturbations, and to then refine these models after experimental testing. Here, we describe the potential of applying functional genomics and proteomics, taking the ERBB family of growth-factor receptors as an example to study the signaling network and its impact on cancer.
Collapse
Affiliation(s)
- Ozgür Sahin
- Division of Molecular Genome Analysis, German Cancer Research Center, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany.
| | | |
Collapse
|
26
|
Yu X, Schneiderhan-Marra N, Hsu HY, Bachmann J, Joos TO. Protein microarrays: effective tools for the study of inflammatory diseases. Methods Mol Biol 2009; 577:199-214. [PMID: 19718518 DOI: 10.1007/978-1-60761-232-2_15] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Inflammation is a defense reaction of an organism against harmful stimuli such as tissue injury or infectious agents. The relationship between the infecting microorganism and the immune, inflammatory, and coagulation responses of the host is intricately intertwined. Due to its complex nature, the molecular mechanisms of inflammation are not yet understood in detail and additional diagnostic tools are required to clarify further aspects. In recent years, protein microarray-based research has moved from being technology-based to application-oriented. Protein microarrays are perfect tools for studying inflammatory diseases. High-density protein arrays enable new classes of autoantibodies, which cause autoimmune diseases, to be discovered. Protein arrays consisting of miniaturized multiplexed sandwich immunoassays allow the simultaneous expression analysis of dozens of signaling molecules such as the cytokines and chemokines involved in the regulation of the immune system. The data enable statements to be made on the status of the disease and its progression as well as support for the clinicians in choosing patient-specific treatment. This chapter reviews the technology and the applications of protein microarrays in diagnosing and monitoring inflammatory diseases.
Collapse
Affiliation(s)
- Xiaobo Yu
- NMI Natural and Medical Sciences Institute, University of Tübingen, Reutlingen, Germany
| | | | | | | | | |
Collapse
|