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Chen QH, Krishnan VV. Identification of ligand binding sites in intrinsically disordered proteins with a differential binding score. Sci Rep 2021; 11:22583. [PMID: 34799573 PMCID: PMC8604960 DOI: 10.1038/s41598-021-00869-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 10/11/2021] [Indexed: 11/25/2022] Open
Abstract
Screening ligands directly binding to an ensemble of intrinsically disordered proteins (IDP) to discover potential hits or leads for new drugs is an emerging but challenging area as IDPs lack well-defined and ordered 3D-protein structures. To explore a new IDP-based rational drug discovery strategy, a differential binding score (DIBS) is defined. The basis of DIBS is to quantitatively determine the binding preference of a ligand to an ensemble of conformations specified by IDP versus such preferences to an ensemble of random coil conformations of the same protein. Ensemble docking procedures performed on repeated sampling of conformations, and the results tested for statistical significance determine the preferential ligand binding sites of the IDP. The results of this approach closely reproduce the experimental data from recent literature on the binding of the ligand epigallocatechin gallate (EGCG) to the intrinsically disordered N-terminal domain of the tumor suppressor p53. Combining established approaches in developing a new method to screen ligands against IDPs could be valuable as a screening tool for IDP-based drug discovery.
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Affiliation(s)
- Qiao-Hong Chen
- Department of Chemistry and Biochemistry, California State University Fresno, Fresno, CA, 93740, USA
| | - V V Krishnan
- Department of Chemistry and Biochemistry, California State University Fresno, Fresno, CA, 93740, USA. .,Department of Pathology and Molecular Medicine, University of California Davis, Davis, CA, 95616, USA.
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Ravindran R, McReynolds C, Yang J, Hammock BD, Ikram A, Ali A, Bashir A, Zohra T, Chang WLW, Hartigan-O’Connor DJ, Rashidi HH, Khan IH. Immune response dynamics in COVID-19 patients to SARS-CoV-2 and other human coronaviruses. PLoS One 2021; 16:e0254367. [PMID: 34242356 PMCID: PMC8270414 DOI: 10.1371/journal.pone.0254367] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 06/24/2021] [Indexed: 11/18/2022] Open
Abstract
COVID-19 serological test must have high sensitivity as well as specificity to rule out cross-reactivity with common coronaviruses (HCoVs). We have developed a quantitative multiplex test, measuring antibodies against spike (S) proteins of SARS-CoV-2, SARS-CoV, MERS-CoV, and common human coronavirus strains (229E, NL63, OC43, HKU1), and nucleocapsid (N) protein of SARS-CoV viruses. Receptor binding domain of S protein of SARS-CoV-2 (S-RBD), and N protein, demonstrated sensitivity (94% and 92.5%, respectively) in COVID-19 patients (n = 53), with 98% specificity in non-COVID-19 respiratory-disease (n = 98), and healthy-controls (n = 129). Anti S-RBD and N antibodies appeared five to ten days post-onset of symptoms, peaking at approximately four weeks. The appearance of IgG and IgM coincided while IgG subtypes, IgG1 and IgG3 appeared soon after the total IgG; IgG2 and IgG4 remained undetectable. Several inflammatory cytokines/chemokines were found to be elevated in many COVID-19 patients (e.g., Eotaxin, Gro-α, CXCL-10 (IP-10), RANTES (CCL5), IL-2Rα, MCP-1, and SCGF-b); CXCL-10 was elevated in all. In contrast to antibody titers, levels of CXCL-10 decreased with the improvement in patient health suggesting it as a candidate for disease resolution. Importantly, anti-N antibodies appear before S-RBD and differentiate between vaccinated and infected people-current vaccines (and several in the pipeline) are S protein-based.
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Affiliation(s)
- Resmi Ravindran
- Department of Pathology and Laboratory Medicine, University of California, Davis, CA, United States of America
| | - Cindy McReynolds
- Department of Entomology and Nematology, University of California, Davis, CA, United States of America
| | - Jun Yang
- Department of Entomology and Nematology, University of California, Davis, CA, United States of America
| | - Bruce D. Hammock
- Department of Entomology and Nematology, University of California, Davis, CA, United States of America
| | - Aamer Ikram
- National Institutes of Health, Rawalpindi, Pakistan
| | - Amna Ali
- National Institutes of Health, Rawalpindi, Pakistan
| | - Adnan Bashir
- National Institutes of Health, Rawalpindi, Pakistan
| | | | - W. L. William Chang
- California National Primate Research Center, University of California, Davis, CA, United States of America
- Department of Medical Microbiology and Immunology, School of Medicine, University of California, Davis, CA, United States of America
| | | | - Hooman H. Rashidi
- Department of Pathology and Laboratory Medicine, University of California, Davis, CA, United States of America
| | - Imran H. Khan
- Department of Pathology and Laboratory Medicine, University of California, Davis, CA, United States of America
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Maguire WF, Schmitz JC, Scemama J, Czambel K, Lin Y, Green AG, Wu S, Lin H, Puhalla S, Rhee J, Stoller R, Tawbi H, Lee JJ, Wright JJ, Beumer JH, Chu E, Appleman LJ. Phase 1 study of safety, pharmacokinetics, and pharmacodynamics of tivantinib in combination with bevacizumab in adult patients with advanced solid tumors. Cancer Chemother Pharmacol 2021; 88:643-654. [PMID: 34164713 DOI: 10.1007/s00280-021-04317-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 06/10/2021] [Indexed: 01/28/2023]
Abstract
PURPOSE We investigated the combination of tivantinib, a c-MET tyrosine kinase inhibitor (TKI), and bevacizumab, an anti-VEGF-A antibody. METHODS Patients with advanced solid tumors received bevacizumab (10 mg/kg intravenously every 2 weeks) and escalating doses of tivantinib (120-360 mg orally twice daily). In addition to safety and preliminary efficacy, we evaluated pharmacokinetics of tivantinib and its metabolites, as well as pharmacodynamic biomarkers in peripheral blood and skin. RESULTS Eleven patients received the combination treatment, which was generally well tolerated. The main dose-limiting toxicity was grade 3 hypertension, which was observed in four patients. Other toxicities included lymphopenia and electrolyte disturbances. No exposure-toxicity relationship was observed for tivantinib or metabolites. No clinical responses were observed. Mean levels of the serum cytokine bFGF increased (p = 0.008) after the bevacizumab-only lead-in and decreased back to baseline (p = 0.047) after addition of tivantinib. Tivantinib reduced levels of both phospho-MET (7/11 patients) and tubulin (4/11 patients) in skin. CONCLUSIONS The combination of tivantinib and bevacizumab produced toxicities that were largely consistent with the safety profiles of the individual drugs. The study was terminated prior to establishment of the recommended phase II dose (RP2D) due to concerns regarding the mechanism of tivantinib, as well as lack of clinical efficacy seen in this and other studies. Tivantinib reversed the upregulation of bFGF caused by bevacizumab, which has been considered a potential mechanism of resistance to therapies targeting the VEGF pathway. The findings from this study suggest that the mechanism of action of tivantinib in humans may involve inhibition of both c-MET and tubulin expression. TRIAL REGISTRATION NCT01749384 (First posted 12/13/2012).
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Affiliation(s)
- William F Maguire
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - John C Schmitz
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA
| | - Jonas Scemama
- Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA
| | - Ken Czambel
- Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA
| | - Yan Lin
- Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center Biostatistics Facility, Pittsburgh, PA, USA.,Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anthony G Green
- Pitt Biospecimen Core Research Histology Department, Health Sciences Core Research Facilities, Pittsburgh, PA, USA
| | - Shaoyu Wu
- Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,School of Pharmaceutical Science, Southern Medical University, Guangzhou, China
| | - Huang Lin
- Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA.,Roche Product Development, Roche (China) Holding Ltd., Shanghai, China
| | - Shannon Puhalla
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - John Rhee
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Ronald Stoller
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Hussein Tawbi
- Department of Melanoma and Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX, USA
| | - James J Lee
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - John J Wright
- Cancer Therapy Evaluation Program, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Jan H Beumer
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Department of Pharmaceutical Sciences, University of Pittsburgh School of Pharmacy, Pittsburgh, PA, USA
| | - Edward Chu
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Department of Oncology and Cancer Therapeutics Program, Albert Einstein Cancer Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Leonard J Appleman
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. .,Cancer Therapeutics Program, UPMC Hillman Cancer Center, 5150 Centre Avenue, Pittsburgh, PA, USA. .,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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MacNeil LG, Tarnopolsky MA, Crane JD. Acute, Exercise-Induced Alterations in Cytokines and Chemokines in the Blood Distinguish Physically Active and Sedentary Aging. J Gerontol A Biol Sci Med Sci 2021; 76:811-818. [PMID: 33289019 DOI: 10.1093/gerona/glaa310] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Indexed: 12/21/2022] Open
Abstract
Aging results in a chronic, proinflammatory state which can promote and exacerbate age-associated diseases. In contrast, physical activity in older adults improves whole body health, protects against disease, and reduces inflammation, but the elderly are less active making it difficult to disentangle the effects of aging from a sedentary lifestyle. To interrogate this interaction, we analyzed peripheral blood collected at rest and postexercise from 68 healthy younger and older donors that were either physically active aerobic exercisers or chronically sedentary. Subjects were profiled for 44 low-abundance cytokines, chemokines, and growth factors in peripheral blood. At rest, we found that regular physical activity had no impact on the age-related elevation in circulating IL-18, eotaxin, GRO, IL-8, IP-10, PDGF-AA, or RANTES. Similarly, there was no impact of physical activity on the age-related reduction in VEGF, EGF, or IL-12 (p70). However, older exercisers had lower resting plasma fractalkine, IL-3, IL-6, and TNF-α compared to sedentary older adults. In contrast to our resting characterization, blood responses following acute exercise produced more striking difference between groups. Physically active younger and older subjects increased over 50% of the analyzed factors in their blood which resulted in both unique and overlapping exercise signatures. However, sedentary individuals, particularly the elderly, had few detectable changes in response to exercise. Overall, we show that long-term physical activity has a limited effect on age-associated changes in basal cytokines and chemokines in the healthy elderly, yet physically active individuals exhibit a broader induction of factors postexercise irrespective of age.
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Affiliation(s)
- Lauren G MacNeil
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Mark A Tarnopolsky
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Justin D Crane
- Department of Biology, Northeastern University, Boston, Massachusetts
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NMR spectroscopy analysis reveals differential metabolic responses in arabidopsis roots and leaves treated with a cytokinesis inhibitor. PLoS One 2020; 15:e0241627. [PMID: 33156865 PMCID: PMC7647083 DOI: 10.1371/journal.pone.0241627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 10/16/2020] [Indexed: 12/26/2022] Open
Abstract
In plant cytokinesis, de novo formation of a cell plate evolving into the new cell wall partitions the cytoplasm of the dividing cell. In our earlier chemical genomics studies, we identified and characterized the small molecule endosidin-7, that specifically inhibits callose deposition at the cell plate, arresting late-stage cytokinesis in arabidopsis. Endosidin-7 has emerged as a very valuable tool for dissecting this essential plant process. To gain insights regarding its mode of action and the effects of cytokinesis inhibition on the overall plant response, we investigated the effect of endosidin-7 through a nuclear magnetic resonance spectroscopy (NMR) metabolomics approach. In this case study, metabolomics profiles of arabidopsis leaf and root tissues were analyzed at different growth stages and endosidin-7 exposure levels. The results show leaf and root-specific metabolic profile changes and the effects of endosidin-7 treatment on these metabolomes. Statistical analyses indicated that the effect of endosidin-7 treatment was more significant than the developmental impact. The endosidin-7 induced metabolic profiles suggest compensations for cytokinesis inhibition in central metabolism pathways. This study further shows that long-term treatment of endosidin-7 profoundly changes, likely via alteration of hormonal regulation, the primary metabolism of arabidopsis seedlings. Hormonal pathway-changes are likely reflecting the plant’s responses, compensating for the arrested cell division, which in turn are leading to global metabolite modulation. The presented NMR spectral data are made available through the Metabolomics Workbench, providing a reference resource for the scientific community.
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6
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Optimizing Measurement of Vascular Endothelial Growth Factor in Small Blood Samples of Premature Infants. Sci Rep 2019; 9:6744. [PMID: 31043645 PMCID: PMC6494810 DOI: 10.1038/s41598-019-43108-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 04/16/2019] [Indexed: 11/30/2022] Open
Abstract
To establish a method that allows for the reliable assessment of vascular endothelial growth factor (VEGF-A) concentrations in very small blood samples of preterm infants. Systemic VEGF measurements are important in view of the most appropriate Anti-VEGF drug to be used for the treatment of acute retinopathy of prematurity (ROP). Cord blood samples from preterm (n = 6) infants, blood samples from preterm infants with treatment requiring ROP (n = 12), and blood samples from healthy adults (n = 10) were collected. Serum, citrate plasma, and serum from recalcified citrate blood were obtained. Levels of VEGF-A and platelet factor-4 (PF-4) were quantified by ELISA or AlphaLISA immunoassay. VEGF-A levels could be detected by both assays, with the AlphaLISA generating slightly lower levels in healthy adults, but not in cord blood of preterm infants. In plasma samples, VEGF levels ranged from non detectable to 181 pg/ml. PF-4 concentrations were between 0.16–3.88 µg/ml. Values of VEGF-A and PF-4 in serum and recalcified serum were significantly higher compared to plasma through the release of these cytokines after platelet activation. In plasma samples of infants with ROP, VEGF-A could always be detected and its values ranged from 19.50 to 245.91 pg/ml and PF-4 concentrations were between 0.1 and 3.3 µg/ml. Using the AlphaLISA kit, we were able to detect VEGF in small sample volumes (5 µl plasma or serum/well) in premature infants with treatment requiring ROP and to monitor platelet activation by PF-4 detection. Minimal blood probe volumes reduce phlebotomy losses avoiding the risk of iatrogenic anemia, thus allowing close monitoring of the cytokine levels in these very fragile infants.
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Koizumi T, Shetty V, Yamaguchi M. Salivary cytokine panel indicative of non-small cell lung cancer. J Int Med Res 2018; 46:3570-3582. [PMID: 29916282 PMCID: PMC6136026 DOI: 10.1177/0300060518775563] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Objective To develop a combinatorial panel of salivary cytokines that manifests the presence of non-small cell lung cancer (NSCLC) that will eventually improve prognosis by facilitating the early diagnosis and management of this common cancer. Methods We performed a case-control study comparing salivary cytokine profiles of 35 adult subjects with NSCLC with those of 35 matched, healthy nonsmokers. Multiplex bead array assays were used to quantify 27 cytokines in saliva, serum, and oral mucosal transudate samples. Logistic regression analysis was used to develop an informative cytokine panel. Receiver operating characteristic (ROC) curves were generated to evaluate the discriminant ability of the panel. Results A combinatorial 12-cytokine panel (interleukin receptor antagonist [IL1RN], IL1B, IL6, IL7, IL8, IL10, C-C motif chemokine ligand 11 [CCL11], tumor necrosis factor, C-X-C motif chemokine ligand 10 [CXCL10], C-C motif chemokine ligand 3, C-C motif chemokine ligand 4, and platelet-derived growth factor-BB) distinguished patients with NSCLC from healthy controls. Further, ROC analysis revealed that a cytokine panel comprising IL10 (odds ratio, 1.156) and CXCL10 (odds ratio, 1.000) discriminated NSCLC with a sensitivity of 60.6% and specificity of 80.8% (area under the ROC curve, 0.701). Conclusion A combinatorial panel of select salivary cytokines indicates the presence of NSCLC.
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Affiliation(s)
- Tomonobu Koizumi
- 1 Shinshu University School of Medicine, Department of Comprehensive Cancer Therapy, Asahi, Matsumoto, Nagano, Japan
| | - Vivek Shetty
- 2 UCLA, Section of Oral & Maxillofacial Surgery, UCLA Health Sciences Center, Los Angeles, CA, USA
| | - Masaki Yamaguchi
- 3 Shinshu University, Graduate School of Science & Technology, Department of Mechanical Engineering & Robotics, Tokida, Ueda, Nagano, Japan
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Di Gregorio MC, Jager AV, Costa AA, Bordin K, Rottinhghaus GE, Petta T, Souto PCMC, Budiño FEL, Oliveira CAF. Determination of Aflatoxin B1-Lysine in Pig Serum and Plasma by Liquid Chromatography-Tandem Mass Spectrometry. J Anal Toxicol 2017; 41:236-241. [PMID: 27979927 DOI: 10.1093/jat/bkw126] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Aflatoxin B1 (AFB1) is a hepatocarcinogen produced by certain Aspergillus species growing on crops. After biotransformation in the liver, AFB1 generates several metabolites, one of which is AFB1 bound to lysine on serum albumin. AFB1-lysine (AFB1-lys) is a digest product of AFB1-albumin and is considered a biomarker of exposure to AFB1 in humans and animals. The objectives of this paper were to evaluate the performance characteristics of a new analytical method for determination of AFB1-lys levels in pig serum, heparinized and ethylenediaminetetraacetic acid (EDTA) plasma and to evaluate the interference of these anticoagulants in AFB1-lys quantification. Blank blood samples were obtained from eight crossbreed 91-day-old barrows fed AFB1-free diets. Pooled samples (n = 3) and individual samples of serum, EDTA and heparinized plasma collected from five pigs were enzymatically digested with pronase at 37°C for 4 h. AFB1-lys was isolated by solid-phase extraction and quantified by liquid chromatography coupled to tandem mass spectrometry. The analytical method was applied for determination of AFB1-lys in serum and EDTA plasma collected from five 49-day-old crossbreed barrows fed ad libitum diets containing 1.1 mg of AFB1 per kg of feed during 7 days (three animals) or 42 days (two animals). Samples of heparinized plasma were only available from animals intoxicated for 42 days. All animals had lower levels of AFB1-lys in EDTA plasma samples (24.78-37.40 ng/mL), when compared to serum (49.32-252.07 ng/mL-1) or heparinized plasma (176.81 and 264.24 ng/mL-1). EDTA did not interfere in AFB1-lys standard detection, but our findings suggest that EDTA should be avoided during blood collection since it affects the pronase activity in AFB1-albumin adduct digestion and, consequently, causes a reduction in the AFB1-lys levels. Hence, determination of AFB1-lys in serum and heparinized plasma is an approach to assess an individual's exposure of swine to AFB1.
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Affiliation(s)
- Mayra C Di Gregorio
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte 225, CEP 13635-900 Pirassununga, SP, Brazil
| | - Alessandra V Jager
- Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café s/n, CEP 14040-903 Ribeirão Preto, SP, Brazil
| | - Aline A Costa
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte 225, CEP 13635-900 Pirassununga, SP, Brazil
| | - Keliani Bordin
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte 225, CEP 13635-900 Pirassununga, SP, Brazil
| | - George E Rottinhghaus
- Veterinary Medical Diagnostic Laboratory, College of Veterinary Medicine, University of Missouri, 1600 East Rollins Street, Columbia, MO 65211, USA
| | - Tânia Petta
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte 225, CEP 13635-900 Pirassununga, SP, Brazil
| | - Pollyana C M C Souto
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte 225, CEP 13635-900 Pirassununga, SP, Brazil
| | - Fabio E L Budiño
- Institute of Animal Science and Pastures, Department of Agriculture and Food Supply of the São Paulo State, R. Heitor Penteado 56, CEP 13460-000 Nova Odessa, SP, Brazil
| | - Carlos A F Oliveira
- Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte 225, CEP 13635-900 Pirassununga, SP, Brazil
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Cahn BR, Goodman MS, Peterson CT, Maturi R, Mills PJ. Yoga, Meditation and Mind-Body Health: Increased BDNF, Cortisol Awakening Response, and Altered Inflammatory Marker Expression after a 3-Month Yoga and Meditation Retreat. Front Hum Neurosci 2017; 11:315. [PMID: 28694775 PMCID: PMC5483482 DOI: 10.3389/fnhum.2017.00315] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 06/01/2017] [Indexed: 12/17/2022] Open
Abstract
Thirty-eight individuals (mean age: 34.8 years old) participating in a 3-month yoga and meditation retreat were assessed before and after the intervention for psychometric measures, brain derived neurotrophic factor (BDNF), circadian salivary cortisol levels, and pro- and anti-inflammatory cytokines. Participation in the retreat was found to be associated with decreases in self-reported anxiety and depression as well as increases in mindfulness. As hypothesized, increases in the plasma levels of BDNF and increases in the magnitude of the cortisol awakening response (CAR) were also observed. The normalized change in BDNF levels was inversely correlated with BSI-18 anxiety scores at both the pre-retreat (r = 0.40, p < 0.05) and post-retreat (r = 0.52, p < 0.005) such that those with greater anxiety scores tended to exhibit smaller pre- to post-retreat increases in plasma BDNF levels. In line with a hypothesized decrease in inflammatory processes resulting from the yoga and meditation practices, we found that the plasma level of the anti-inflammatory cytokine Interleukin-10 was increased and the pro-inflammatory cytokine Interleukin-12 was reduced after the retreat. Contrary to our initial hypotheses, plasma levels of other pro-inflammatory cytokines, including Interferon Gamma (IFN-γ), Tumor Necrosis Factor (TNF-α), Interleukin-1β (IL-1β), Interleukin-6 (IL-6), and Interleukin-8 (IL-8) were increased after the retreat. Given evidence from previous studies of the positive effects of meditative practices on mental fitness, autonomic homeostasis and inflammatory status, we hypothesize that these findings are related to the meditative practices throughout the retreat; however, some of the observed changes may also be related to other aspects of the retreat such as physical exercise-related components of the yoga practice and diet. We hypothesize that the patterns of change observed here reflect mind-body integration and well-being. The increased BDNF levels observed is a potential mediator between meditative practices and brain health, the increased CAR is likely a reflection of increased dynamic physiological arousal, and the relationship of the dual enhancement of pro- and anti-inflammatory cytokine changes to healthy immunologic functioning is discussed.
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Affiliation(s)
- B. Rael Cahn
- Department of Psychiatry and Behavioral Sciences, University of Southern CaliforniaLos Angeles, CA, United States
- Brain and Creativity Institute, University of Southern CaliforniaLos Angeles, CA, United States
| | - Matthew S. Goodman
- California School of Professional Psychology, Alliant International UniversitySan Diego, CA, United States
| | - Christine T. Peterson
- Center of Excellence for Research and Training in Integrative Health, Department of Family Medicine and Public Health, University of California, San DiegoLa Jolla, CA, United States
| | - Raj Maturi
- Midwest Eye InstituteIndianapolis, IN, United States
- Department of Ophthalmology, Indiana University School of MedicineIndianapolis, IN, United States
| | - Paul J. Mills
- Center of Excellence for Research and Training in Integrative Health, Department of Family Medicine and Public Health, University of California, San DiegoLa Jolla, CA, United States
- Chopra FoundationCarlsbad, CA, United States
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Stroncek DF, Butterfield LH, Cannarile MA, Dhodapkar MV, Greten TF, Grivel JC, Kaufman DR, Kong HH, Korangy F, Lee PP, Marincola F, Rutella S, Siebert JC, Trinchieri G, Seliger B. Systematic evaluation of immune regulation and modulation. J Immunother Cancer 2017; 5:21. [PMID: 28331613 PMCID: PMC5359947 DOI: 10.1186/s40425-017-0223-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 02/10/2017] [Indexed: 02/06/2023] Open
Abstract
Cancer immunotherapies are showing promising clinical results in a variety of malignancies. Monitoring the immune as well as the tumor response following these therapies has led to significant advancements in the field. Moreover, the identification and assessment of both predictive and prognostic biomarkers has become a key component to advancing these therapies. Thus, it is critical to develop systematic approaches to monitor the immune response and to interpret the data obtained from these assays. In order to address these issues and make recommendations to the field, the Society for Immunotherapy of Cancer reconvened the Immune Biomarkers Task Force. As a part of this Task Force, Working Group 3 (WG3) consisting of multidisciplinary experts from industry, academia, and government focused on the systematic assessment of immune regulation and modulation. In this review, the tumor microenvironment, microbiome, bone marrow, and adoptively transferred T cells will be used as examples to discuss the type and timing of sample collection. In addition, potential types of measurements, assays, and analyses will be discussed for each sample. Specifically, these recommendations will focus on the unique collection and assay requirements for the analysis of various samples as well as the high-throughput assays to evaluate potential biomarkers.
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Affiliation(s)
- David F Stroncek
- Department of Transfusion Medicine, National Institutes of Health, 10 Center Drive, Building 10, Room 3C720, Bethesda, MD 20892 USA
| | - Lisa H Butterfield
- Department of Medicine, Surgery and Immunology, University of Pittsburgh Cancer Institute, 5117 Centre Avenue, Pittsburgh, PA 15213 USA
| | - Michael A Cannarile
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Munich, Nonnenwald 2, 82377 Penzberg, Germany
| | - Madhav V Dhodapkar
- Department of Hematology & Immunobiology, Yale University, 333 Cedar Street, Box 208021, New Haven, CT 06510 USA
| | - Tim F Greten
- GI-Malignancy Section, Thoracic and GI Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 10 Room 12 N226, 9000 Rockville, Bethesda, MD 20892 USA
| | - Jean Charles Grivel
- Division of Translational Medicine, Sidra Medical and Research Center, PO Box 26999, Al Luqta Street, Doha, Qatar
| | - David R Kaufman
- Merck Research Laboratories, PO Box 1000, UG 3CD28, North Wales, PA 19454 USA
| | - Heidi H Kong
- Dermatology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 10, MSC 1908, Bethesda, MD 20892-1908 USA
| | - Firouzeh Korangy
- GI-Malignancy Section, Thoracic and GI Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 10 Room 12 N226, 9000 Rockville, Bethesda, MD 20892 USA
| | - Peter P Lee
- Department of Immuno-Oncology, City of Hope, 1500 East Duarte Road, Duarte, CA 91010 USA
| | - Francesco Marincola
- Division of Translational Medicine, Sidra Medical and Research Center, PO Box 26999, Al Luqta Street, Doha, Qatar
| | - Sergio Rutella
- The John van Geest Cancer Research Centre, Nottingham Trent University, Clifton Campus, Nottingham, NG11 8NS UK
| | - Janet C Siebert
- CytoAnalytics, 3500 South Albion Street, Cherry Hills Village, CO 80113 USA
| | - Giorgio Trinchieri
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 37/Room 4146, Bethesda, MD 20892 USA
| | - Barbara Seliger
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Str. 2, Halle, Germany
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11
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Multiple Circulating Cytokines Are Coelevated in Chronic Obstructive Pulmonary Disease. Mediators Inflamm 2016; 2016:3604842. [PMID: 27524865 PMCID: PMC4976159 DOI: 10.1155/2016/3604842] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 06/23/2016] [Indexed: 01/05/2023] Open
Abstract
Inflammatory biomarkers, including cytokines, are associated with COPD, but the association of particular circulating cytokines with systemic pathology remains equivocal. To investigate this, we developed a protein microarray system to detect multiple cytokines in small volumes of serum. Fourteen cytokines were measured in serum from never-smokers, ex-smokers, current smokers, and COPD patients (GOLD stages 1–3). Certain individual circulating cytokines (particularly TNFα and IL-1β) were significantly elevated in concentration in the serum of particular COPD patients (and some current/ex-smokers without COPD) and may serve as markers of particularly significant systemic inflammation. However, numerous circulating cytokines were raised such that their combined, but not individual, elevation was significantly associated with severity of disease, and these may be further indicators of, and contributors to, the systemic inflammatory manifestations of COPD. The coelevation of numerous circulating cytokines in COPD is consistent with the insidious development, chronic nature, and systemic comorbidities of the disease.
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12
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Ribeiro A, Ritter T, Griffin M, Ceredig R. Development of a flow cytometry-based potency assay for measuring the in vitro immunomodulatory properties of mesenchymal stromal cells. Immunol Lett 2016; 177:38-46. [PMID: 27451032 DOI: 10.1016/j.imlet.2016.07.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 07/04/2016] [Accepted: 07/19/2016] [Indexed: 01/14/2023]
Abstract
Human bone marrow-derived mesenchymal stromal/stem cells (MSC) have well-documented modulatory effects on multiple immune cell types. Although these effects are linked to their therapeutic benefit in diverse diseases, a reliable, quantitative assay of the immunomodulatory potency of individual human MSC preparations is lacking. The aims of this study were to develop an optimised rapid turnaround, flow cytometry-based whole-blood assay to monitor MSC potency and to validate its application to MSC immunomodulation. A protocol for short-term LPS stimulation of anti-coagulated whole blood samples followed by combined surface CD45/CD14 and intracellular TNF-α staining was initially developed for analysis on a 4 colour desktop cytometer. Optimal monocyte activation was dependent on the presence of extracellular calcium ions thereby precluding the use of EDTA and sodium citrate as anticoagulants. Optimal assay conditions proved to be 1ng/mL ultrapure-LPS added to 10-fold diluted, heparin anti-coagulated whole blood incubated for 6h at 37°C. Under these conditions, addition of human bone marrow-derived MSC (hBM-MSC) from multiple donors resulted in a reproducible, dose-dependent inhibition of LPS-stimulated monocyte TNF-α expression. We conclude that this protocol represents a practical, quantitative assay of a clinically relevant functional effect of hBM-MSCs as well as other immunomodulatory agents.
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Affiliation(s)
- Andreia Ribeiro
- Regenerative Medicine Institute, National Centre for Biomedical Engineering Science and School of Medicine, National University of Ireland, Galway, Ireland.
| | - Thomas Ritter
- Regenerative Medicine Institute, National Centre for Biomedical Engineering Science and School of Medicine, National University of Ireland, Galway, Ireland.
| | - Matthew Griffin
- Regenerative Medicine Institute, National Centre for Biomedical Engineering Science and School of Medicine, National University of Ireland, Galway, Ireland.
| | - Rhodri Ceredig
- Regenerative Medicine Institute, National Centre for Biomedical Engineering Science and School of Medicine, National University of Ireland, Galway, Ireland.
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13
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Allione A, Di Gaetano C, Dani N, Barberio D, Sieri S, Krogh V, Matullo G. Anticoagulants used in plasma collection affect adipokine multiplexed measurements. Cytokine 2016; 80:43-7. [PMID: 26945995 DOI: 10.1016/j.cyto.2016.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 03/01/2016] [Accepted: 03/01/2016] [Indexed: 11/15/2022]
Abstract
Obesity is an important health problem worldwide. Adipose tissue acts as an endocrine organ that secretes various bioactive substances, called adipokines, including pro-inflammatory biomarkers such as TNF-α, IL-6, leptin and C-reactive protein (CRP) and anti-inflammatory molecules such as adiponectin. The deregulated production of adipokines in obesity is linked to the pathogenesis of various disease processes and monitoring their variation is critical to understand metabolic diseases. The aim of this study was to determine the plasma concentration of adipokines in healthy subjects by multiplexed measurements and the effect of anticoagulants on their levels. Plasma samples from 10 healthy donors were collected in two different anticoagulants (sodium citrate or heparin). All markers, excluding TNF-α, showed significantly higher concentrations in heparinized compared to citrate plasma. However, levels of adipokines in different plasma samples were highly correlated for most of these markers. We reported that different anticoagulants used in the preparation of the plasma samples affected the measurements of some adipokines. The importance of the present results in epidemiology is relevant when comparing different studies in which blood samples were collected with different anticoagulants.
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Affiliation(s)
- Alessandra Allione
- Human Genetics Foundation - HuGeF, Via Nizza 52, 10126 Turin, Italy; Department of Medical Sciences, University of Turin, Via Santena 19, 10100 Turin, Italy.
| | - Cornelia Di Gaetano
- Human Genetics Foundation - HuGeF, Via Nizza 52, 10126 Turin, Italy; Department of Medical Sciences, University of Turin, Via Santena 19, 10100 Turin, Italy
| | - Nadia Dani
- Bioclarma Srl, Via Nizza 52, 10126 Turin, Italy
| | | | - Sabina Sieri
- IRCCS Foundation, Istituto Nazionale dei Tumori, Via Venezian, 1, 20133 Milan, Italy
| | - Vittorio Krogh
- IRCCS Foundation, Istituto Nazionale dei Tumori, Via Venezian, 1, 20133 Milan, Italy
| | - Giuseppe Matullo
- Human Genetics Foundation - HuGeF, Via Nizza 52, 10126 Turin, Italy; Department of Medical Sciences, University of Turin, Via Santena 19, 10100 Turin, Italy
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14
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Interleukin-17A Gene Variability in Patients with Type 1 Diabetes Mellitus and Chronic Periodontitis: Its Correlation with IL-17 Levels and the Occurrence of Periodontopathic Bacteria. Mediators Inflamm 2016; 2016:2979846. [PMID: 26924897 PMCID: PMC4748108 DOI: 10.1155/2016/2979846] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/30/2015] [Accepted: 01/03/2016] [Indexed: 01/10/2023] Open
Abstract
Interleukin-17 contributes to the pathogenesis of type 1 diabetes mellitus (T1DM) and chronic periodontitis (CP). We analyzed IL-17A -197A/G and IL-17F +7488C/T polymorphisms in T1DM and CP and determined their associations with IL-17 production and occurrence of periopathogens. Totally 154 controls, 125 T1DM, and 244 CP patients were genotyped using 5' nuclease TaqMan(®) assays. Bacterial colonization was investigated by a DNA-microarray kit. Production of IL-17 after in vitro stimulation of mononuclear cells by mitogens and bacteria was examined by the Luminex system. Although no differences in the allele/genotype frequencies between patients with CP and T1DM + CP were found, the IL-17A -197 A allele increased the risk of T1DM (P < 0.05). Levels of HbA1c were significantly elevated in carriers of the A allele in T1DM patients (P < 0.05). Production of IL-17 by mononuclear cells of CP patients (unstimulated/stimulated by Porphyromonas gingivalis) was associated with IL-17A A allele (P < 0.05). IL-17A polymorphism increased the number of Tannerella forsythia and Treponema denticola in patients with CP and T1DM + CP, respectively (P < 0.05). IL-17A gene variability may influence control of T1DM and the "red complex" bacteria occurrence in patients with CP and T1DM + CP. Our findings demonstrated the functional relevance of the IL-17A polymorphism with higher IL-17 secretion in individuals with A allele.
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15
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McCoy JP. Issue highlights--November 2014. CYTOMETRY PART B-CLINICAL CYTOMETRY 2015; 86:371-2. [PMID: 25336149 DOI: 10.1002/cyto.b.21186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
OBJECTIVE Considerable breakthroughs in the field of sepsis have been made using animal models. Sepsis exhibits a wide array of derangements that may be evaluated in the blood, including the release of proinflammatory and anti-inflammatory cytokines. The Shock journal adheres to the ARRIVE guidelines regarding reporting in vivo results to allow reproducibility of data findings. It is generally assumed that blood cytokine concentrations collected from typical sampling sites will be similar, but there are no data validating that this is true. The main purpose of the present study was to determine if the location of blood sampling results in cytokine concentration differences following inflammatory insults. METHODS Two different models of acute inflammation were studied. Adult, female ICR (Institute of Cancer Research) mice were injected with Escherichia coli lipopolysaccharide (n = 28) or subjected to cecal ligation and puncture (n = 16). They were killed at early time points following these inflammatory challenges for the collection of blood from the facial vein, retro-orbital sinus, and heart. Additional samples were collected in EDTA and heparin. Plasma cytokines from the same mouse were collected from each sampling site and evaluated by enzyme-linked immunosorbent assay. Clinical chemical parameters including plasma blood urea nitrogen and total protein were also analyzed. RESULTS Regardless of model, time of collection, or cytokine measured, cytokine values from heart blood were higher than facial vein values from the same mouse. Interleukin (IL-6) collected from the heart relative to the facial vein demonstrated elevated concentrations following injection of lipopolysaccharide. In a similar manner, higher concentrations of IL-6, macrophage inflammatory protein 2, IL-10, and IL-1 receptor antagonist were found in cardiac puncture samples compared with other sampling sites 24 h after sepsis induced by cecal ligation and puncture. Similar differences were not seen when comparing blood urea nitrogen and total protein values from the two different sites. Using plasma IL-6 collected from the heart would incorrectly stratify predicted-to-live mice into the predicted-to-die category. Therefore, a simple linear regression model was developed to correctly restratify mice to their predicted fate. These data demonstrate that proinflammatory and anti-inflammatory cytokine concentrations are dramatically elevated when drawn centrally from the heart compared with collection from peripheral locations such as the facial vein. It is critical for publications to document the sampling location when evaluating plasma cytokines and attempting to compare studies.
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17
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Holtan SG, Verneris MR, Schultz KR, Newell LF, Meyers G, He F, DeFor TE, Vercellotti GM, Slungaard A, MacMillan ML, Cooley SA, Blazar BR, Panoskaltsis-Mortari A, Weisdorf DJ. Circulating angiogenic factors associated with response and survival in patients with acute graft-versus-host disease: results from Blood and Marrow Transplant Clinical Trials Network 0302 and 0802. Biol Blood Marrow Transplant 2015; 21:1029-36. [PMID: 25759146 PMCID: PMC4426052 DOI: 10.1016/j.bbmt.2015.02.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 02/17/2015] [Indexed: 12/26/2022]
Abstract
Circulating angiogenic factors (AF) reflect tissue healing capacity, although some AF can also contribute to inflammation and are indicative of endothelial dysfunction. The AF milieu in acute graft-versus-host disease (aGVHD) has not been broadly characterized. We hypothesized that patients with abundant AF involved in repair/regeneration versus those mediating damage/inflammation would have improved outcomes. Circulating AF known predominantly for repair/regeneration (epidermal growth factor [EGF], fibroblast growth factor-1 and -2, heparin binding-EGF-like growth factor, and vascular endothelial growth factor-A [VEGF-A], -C, and -D) and for damage/inflammation (angiopoietin-2, endothelin-1, soluble endoglin [sEng], follistatin [FS], leptin, and placental growth factor [PlGF]) were measured in a discovery set of hematopoietic cell recipients with grade III and IV aGVHD and compared with controls, then validated in 2 aGVHD cohorts enrolled in Blood and Marrow Transplant Clinical Trials Network (BMT CTN) trials 0302 (n = 105, serum) and 0802 (n = 158, plasma) versus controls without aGVHD (n = 53, serum). Levels of EGF and VEGF-A were lower than in controls at the onset of aGVHD in both trials and higher with complete response to first-line aGVHD therapy in CTN 0802. FS and PlGF were elevated in aGVHD measured in either serum or plasma. At day 28 after initial aGVHD therapy, elevated FS was an independent negative prognostic factor for survival in both cohorts (hazard ratio, 9.3 in CTN 0302; 2.8 in CTN 0802). These data suggest that circulating AF are associated with clinical outcomes after aGVHD and, thus, may contribute to both pathogenesis and recovery.
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Affiliation(s)
- Shernan G Holtan
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota.
| | - Michael R Verneris
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota
| | - Kirk R Schultz
- Division of Pediatric Hematology/Oncology/BMT, BC Children's Hospital, Vancouver, University of British Columbia; Blood and Marrow Transplant Clinical Trials Network, Rockville, Maryland
| | - Laura F Newell
- Blood and Marrow Transplant Program, Oregon Health & Science University, Portland, Oregon
| | - Gabrielle Meyers
- Blood and Marrow Transplant Program, Oregon Health & Science University, Portland, Oregon
| | - Fiona He
- School of Medicine, University of Minnesota, Minneapolis, Minnesota
| | - Todd E DeFor
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota
| | - Gregory M Vercellotti
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota
| | - Arne Slungaard
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota
| | - Margaret L MacMillan
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota
| | - Sarah A Cooley
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota
| | - Bruce R Blazar
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota
| | | | - Daniel J Weisdorf
- Blood and Marrow Transplant Program, University of Minnesota, Minneapolis, Minnesota; Blood and Marrow Transplant Clinical Trials Network, Rockville, Maryland
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18
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The importance of sample collection when using single cytokine levels and systemic cytokine profiles as biomarkers--a comparative study of serum versus plasma samples. J Immunol Methods 2015; 418:19-28. [PMID: 25637409 DOI: 10.1016/j.jim.2015.01.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 01/20/2015] [Accepted: 01/21/2015] [Indexed: 12/29/2022]
Abstract
BACKGROUND Cytokines, soluble adhesion molecules and metalloproteinases can be detected in human serum or plasma samples. Such systemic levels are widely used as biomarkers in epidemiological and clinical studies. METHODS We prepared serum samples and three types of plasma samples (EDTA, heparin, citric acid) from 20 healthy individuals. The levels of 31 cytokines, four soluble adhesion molecules and eight matrix metalloproteinases were analyzed by Luminex technology. RESULTS Most mediators showed detectable levels in both plasma and serum. Several mediators that can be released by platelets showed increased serum levels, especially CCL5 and CD40L, but for the other mediators the serum levels did not correlate with peripheral blood platelet counts and for these last mediators serum and plasma levels often showed strong correlations. The use of bivalirudin for anticoagulation significantly increased and citric acid combined with platelet inhibitors (ticagrelor, acetylsalicylic acid plus prostaglandin E2) did not alter plasma levels of platelet-store mediators compared with citric acid alone. The impact of sample preparation differed between mediators; for many mediators strong correlations were seen between serum and plasma levels even when absolute levels differed. Soluble adhesion molecule levels showed only minor differences between samples. Unsupervised hierarchical clustering suggested that the effect of sampling/preparation was strongest for serum and heparin plasma samples. CONCLUSION Careful standardization of sample preparation is usually necessary when analyzing systemic mediator levels, and differences caused by sample preparation should be considered as a possible explanation if studies show conflicting results.
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19
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Mani A, Ravindran R, Mannepalli S, Vang D, Luciw PA, Hogarth M, Khan IH, Krishnan VV. Data mining strategies to improve multiplex microbead immunoassay tolerance in a mouse model of infectious diseases. PLoS One 2015; 10:e0116262. [PMID: 25614982 PMCID: PMC4304816 DOI: 10.1371/journal.pone.0116262] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 12/04/2014] [Indexed: 11/25/2022] Open
Abstract
Multiplex methodologies, especially those with high-throughput capabilities generate large volumes of data. Accumulation of such data (e.g., genomics, proteomics, metabolomics etc.) is fast becoming more common and thus requires the development and implementation of effective data mining strategies designed for biological and clinical applications. Multiplex microbead immunoassay (MMIA), on xMAP or MagPix platform (Luminex), which is amenable to automation, offers a major advantage over conventional methods such as Western blot or ELISA, for increasing the efficiencies in serodiagnosis of infectious diseases. MMIA allows detection of antibodies and/or antigens efficiently for a wide range of infectious agents simultaneously in host blood samples, in one reaction vessel. In the process, MMIA generates large volumes of data. In this report we demonstrate the application of data mining tools on how the inherent large volume data can improve the assay tolerance (measured in terms of sensitivity and specificity) by analysis of experimental data accumulated over a span of two years. The combination of prior knowledge with machine learning tools provides an efficient approach to improve the diagnostic power of the assay in a continuous basis. Furthermore, this study provides an in-depth knowledge base to study pathological trends of infectious agents in mouse colonies on a multivariate scale. Data mining techniques using serodetection of infections in mice, developed in this study, can be used as a general model for more complex applications in epidemiology and clinical translational research.
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Affiliation(s)
- Akshay Mani
- Center for Comparative Medicine, University of California Davis, Davis, California, United States of America
| | - Resmi Ravindran
- Center for Comparative Medicine, University of California Davis, Davis, California, United States of America
| | - Soujanya Mannepalli
- Department of Chemistry, California State University, Fresno, California, United States of America
| | - Daniel Vang
- Center for Comparative Medicine, University of California Davis, Davis, California, United States of America
| | - Paul A Luciw
- Center for Comparative Medicine, University of California Davis, Davis, California, United States of America; Department of Pathology and Laboratory Medicine, University of California School of Medicine, Davis, California, United States of America
| | - Michael Hogarth
- Department of Pathology and Laboratory Medicine, University of California School of Medicine, Davis, California, United States of America
| | - Imran H Khan
- Center for Comparative Medicine, University of California Davis, Davis, California, United States of America; Department of Pathology and Laboratory Medicine, University of California School of Medicine, Davis, California, United States of America
| | - Viswanathan V Krishnan
- Center for Comparative Medicine, University of California Davis, Davis, California, United States of America; Department of Chemistry, California State University, Fresno, California, United States of America; Department of Pathology and Laboratory Medicine, University of California School of Medicine, Davis, California, United States of America
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