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Beyls E, Baeyens A, Vral A. The cytokinesis-block micronucleus assay for cryopreserved whole blood. Int J Radiat Biol 2021; 97:1252-1260. [PMID: 34138661 DOI: 10.1080/09553002.2021.1941378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE The cytokinesis-block micronucleus (MN) assay is a widely used technique in basic radiobiology research, human biomonitoring studies and in vitro radiosensitivity testing. Fresh whole blood cultures are commonly used for these purposes, but immediate processing of fresh samples can be logistically challenging. Therefore, we aimed at establishing a protocol for the MN assay on cryopreserved whole blood, followed by a thorough evaluation of the reliability of this assay for use in radiosensitivity assessment in patients. MATERIALS AND METHODS Whole blood samples of 20 healthy donors and 4 patients with a primary immunodeficiency disease (PID) were collected to compare the results obtained with the MN assay performed on fresh versus cryopreserved whole blood samples. MN yields were scored after irradiation with 220 kV X-rays (dose rate 3 Gy/min), with doses ranging from 0.5-2 Gy. RESULTS The application of the MN assay on cryopreserved blood samples was successful in all analyzed samples. The radiation-induced MN and NDI scores in fresh and cryopreserved blood cultures were found to be similar. Acceptable inter-individual and intra-individual variabilities in MN yields were observed. Repeated analysis of cryopreserved blood cultures originating from the same blood sample, thawed at different time points, revealed that MN values remain stable for cryopreservation periods up to one year. Finally, radiosensitive patients were successfully identified using the MN assay on cryopreserved samples. CONCLUSIONS To our knowledge, this study is the first report of the successful use of cryopreserved whole blood samples for application of the MN assay. The data presented here demonstrate that the MN assay performed on cryopreserved whole blood is reliable for radiosensitivity testing. Our results also support its wider use in epidemiological, biomonitoring and genotoxicity studies. The presented method of cryopreservation of blood samples might also benefit other assays.
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Affiliation(s)
- Elien Beyls
- Radiobiology Research Group, Department of Human Structure and Repair, Ghent University, Ghent, Belgium
| | - Ans Baeyens
- Radiobiology Research Group, Department of Human Structure and Repair, Ghent University, Ghent, Belgium
| | - Anne Vral
- Radiobiology Research Group, Department of Human Structure and Repair, Ghent University, Ghent, Belgium
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2
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Braudeau C, Salabert-Le Guen N, Chevreuil J, Rimbert M, Martin JC, Josien R. An easy and reliable whole blood freezing method for flow cytometry immuno-phenotyping and functional analyses. CYTOMETRY PART B-CLINICAL CYTOMETRY 2021; 100:652-665. [PMID: 33544978 DOI: 10.1002/cyto.b.21994] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 12/01/2020] [Accepted: 01/26/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Immune profiling by flow cytometry is not always possible on fresh blood samples due to time and/or transport constraints. Furthermore, the cryopreservation of peripheral blood mononuclear cells (PBMC) requires on-site specialized lab facilities, thus severely restricting the extent to which blood immune monitoring can be applied to multicenter clinical studies. These major limitations can be addressed through the development of simplified whole blood freezing methods. METHODS In this report, we describe an optimized easy protocol for rapid whole blood freezing with the CryoStor® CS10 solution. Using flow cytometry, we compared cellular viability and composition on cryopreserved whole blood samples to matched fresh blood, as well as fresh and frozen PBMC. RESULTS Though partial loss of neutrophils was observed, leucocyte viability was routinely >75% and we verified the preservation of viable T cells, NK cells, monocytes, dendritic cells, and eosinophils in frequencies similar to those observed in fresh samples. A moderate decrease in B cell frequencies was observed. Importantly, we validated the possibility to analyze major intracellular markers, such as FOXP3 and Helios in regulatory T cells. Finally, we demonstrated good functional preservation of CS10-cryopreserved cells through the analysis of intracellular cytokine production in ex vivo stimulated T cells (IFNg, IL-4, IL-17A,) and monocytes (IL-1b, IL-6, TNFa). CONCLUSIONS In conclusion, our protocol provides a robust method to apply reliable immune monitoring studies to cryopreserved whole blood samples, hence offering new important opportunities for the design of future multicenter clinical trials.
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Affiliation(s)
- Cecile Braudeau
- Laboratoire d'Immunologie, CIMNA, LabEx IGO "Immunotherapy, Graft, Oncology", Nantes, France.,CHU Nantes, Nantes Université, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR 1064, ITUN, Nantes, France
| | - Nina Salabert-Le Guen
- Laboratoire d'Immunologie, CIMNA, LabEx IGO "Immunotherapy, Graft, Oncology", Nantes, France.,CHU Nantes, Nantes Université, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR 1064, ITUN, Nantes, France
| | - Justine Chevreuil
- Laboratoire d'Immunologie, CIMNA, LabEx IGO "Immunotherapy, Graft, Oncology", Nantes, France.,CHU Nantes, Nantes Université, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR 1064, ITUN, Nantes, France
| | - Marie Rimbert
- Laboratoire d'Immunologie, CIMNA, LabEx IGO "Immunotherapy, Graft, Oncology", Nantes, France.,CHU Nantes, Nantes Université, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR 1064, ITUN, Nantes, France
| | - Jerome C Martin
- Laboratoire d'Immunologie, CIMNA, LabEx IGO "Immunotherapy, Graft, Oncology", Nantes, France.,CHU Nantes, Nantes Université, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR 1064, ITUN, Nantes, France
| | - Regis Josien
- Laboratoire d'Immunologie, CIMNA, LabEx IGO "Immunotherapy, Graft, Oncology", Nantes, France.,CHU Nantes, Nantes Université, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR 1064, ITUN, Nantes, France
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Tootee A, Nikbin B, Ghahary A, Esfahani EN, Arjmand B, Aghayan H, Qorbani M, Larijani B. Assessment of immune-alternations and their correlations with therapeutic outcomes of transplantation of autologous Mesenchymal and Allogenic fetal stem cells in patients with type 1 diabetes: a study protocol. J Diabetes Metab Disord 2021; 20:1067-1073. [PMID: 34222099 DOI: 10.1007/s40200-020-00716-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 12/22/2020] [Indexed: 11/26/2022]
Abstract
Introduction Stem-cell therapy, which has recently emerged as a potentially therapeutic option for diabetes, is demonstrated to significantly alter both cellular and non-cellular elements of the immune system. In addition, it is demonstrated that allogenic stem-cells, once considered immune-privileged, can be rejected by the host immune system almost similar to any other somatic cell. To date, nonetheless, details of these intricate interactions remain obscure. The current study is designed to illuminate both aforementioned favorable and unfavorable stem cell-mediated immune reactions. Findings of this study may shed some light on how stem cells may exert their therapeutic effect in type 1 diabetes through immune system-mediated mechanisms and illuminate the partially-obscure immune-caused rejection of these cells. Methods and analysis For the purpose of this study, frozen whole blood samples obtained from patients with type 1 diabetes who received stem cells at the Endocrinology and Metabolism Research Institute of Tehran University of Medical Sciences in two different clinical trials will be thawed and analyzed. These clinical trials were carried out using two different sources of stem cells, namely allogenic fetal and autologous mesenchymal cells. The samples we aim to analyze were obtained from the patients before the procedure and regularly after it, one, three, six, 12, and 24 months later. For the purpose of this study, the following parameters will be measured: C-peptide levels, IDAA1c (a surrogate marker of beta cell function which is calculated as HbA1c (%) + [4 × insulin dose (units per kilogram per day)]), frequencies of islet-specific autoreactive CD8+ T cells (CTL), different lymphocyte subsets, thymic function indicators, T cell repertoire diversity (including Treg/Tconv ratios), plasma levels of several pro- and anti-inflammatory cytokines, diabetes autoantibodies, and HLA typing. Ethics and dissemination The stem cell transplantation clinical trials which provided the primary source of our samples were carried out at the Endocrinology and Metabolism Research Institute of Tehran University of Medical Sciences between 2008 and 2012. These series of clinical trials have secured approval of the ethics committee of Tehran University of Medical Sciences (ethical code number: E-0089) and registered on the national clinical trial registry of Islamic Republic of Iran (IRCT) with the identifier codes: IRCT138810271414N8 (for autologous mesenchymal cells) and IRCT201103171414N23 (for allogenic fetal cells). Our findings are to be presented at international scientific events, published in peer-reviewed journals, and disseminated both electronically and in print. Besides, results of the current study will be used for design and implementation of future laboratory investigations and clinical trials at the Endocrinology and Metabolism Research Institute of Tehran University of Medical Sciences.
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Affiliation(s)
- Ali Tootee
- Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Behrouz Nikbin
- Research Center of Molecular Immunology, Tehran University of Medical Sciences, Tehran, Iran
| | - Aziz Ghahary
- Burn and Wound Healing Research Laboratory, Department of Surgery, Plastic Surgery, University of British Columbia, Vancouver, Canada
| | - Ensieh Nasli Esfahani
- Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Babak Arjmand
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular Cellular Sciences Institute, Tehran university of Medical Sciences, Tehran, Iran
| | - Hamidreza Aghayan
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular Cellular Sciences Institute, Tehran university of Medical Sciences, Tehran, Iran
| | - Mostafa Qorbani
- Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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4
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D'Angelo C, Goldeck D, Pawelec G, Gaspari L, Di Iorio A, Paganelli R. Exploratory study on immune phenotypes in Alzheimer's disease and vascular dementia. Eur J Neurol 2020; 27:1887-1894. [PMID: 32441872 DOI: 10.1111/ene.14360] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 05/17/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND PURPOSE The differentiation of Alzheimer's disease (AD) dementia from vascular dementia (VaD) and mixed-type dementia (mixed dementia) requires stepwise analysis and usually occurs late in the disease process. Early diagnosis and therapy monitoring would benefit greatly from the identification of biomarkers of neurodegeneration, especially blood biomarkers. To this end, the aim of the present pilot study was to investigate differences in the distribution of peripheral T-cell populations in patients with AD compared to VaD and mixed dementia. METHODS Flow cytometry was performed on blood samples from 11 patients with AD, six with VaD and six with mixed dementia, as well as 17 healthy control subjects (HCs). CD4+ and CD8+ T cells were typed for expression of CD45, CD27, CD28, CD25, FoxP3, CCR4 and CCR6; the other leukocytes were also assessed. Functionally, immune cell uptake of the β-amyloid (Aβ) toxic fragment (Aβ1-42 ) was also evaluated. RESULTS A higher proportion of CD4+CD28- memory T cells and a reciprocal reduction of CD4+CD28+CD27+ naïve T lymphocytes was detected in all patient groups relative to controls. Significantly fewer CD4+CD25+FoxP3 regulatory T cells were present in patients with VaD, and significantly more CCR6+ and CCR4+ CD4+ T cells in those with AD. Higher CCR6+ T-cell frequencies were also present in patients with mixed dementia, potentially due to the inflammation and immune cell chemoattraction triggered by Aβ. CONCLUSIONS The present study was a comprehensive investigation comparing different kinds of dementia, revealing differentially expressed peripheral markers that are potentially useful for early AD, VaD and mixed dementia diagnoses, and that would assist in proper treatments for these disparate diseases. Validation is now required.
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Affiliation(s)
- C D'Angelo
- Department of Medicine and Sciences of Aging, University 'G. d'Annunzio' Chieti-Pescara, Chieti, Italy
| | - D Goldeck
- Department of Internal Medicine II, Centre for Medical Research, University of Tübingen, Tübingen, Germany
| | - G Pawelec
- Department of Immunology, University of Tübingen, Tübingen, Germany.,Cancer Solutions Program, Health Sciences North Research Institute, Sudbury, ON, Canada
| | - L Gaspari
- Department of Medicine and Sciences of Aging, University 'G. d'Annunzio' Chieti-Pescara, Chieti, Italy
| | - A Di Iorio
- Department of Medicine and Sciences of Aging, University 'G. d'Annunzio' Chieti-Pescara, Chieti, Italy
| | - R Paganelli
- Department of Medicine and Sciences of Aging, University 'G. d'Annunzio' Chieti-Pescara, Chieti, Italy
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Almajwal AM, Alam I, Abulmeaty M, Razak S, Pawelec G, Alam W. Intake of dietary advanced glycation end products influences inflammatory markers, immune phenotypes, and antiradical capacity of healthy elderly in a little-studied population. Food Sci Nutr 2020; 8:1046-1057. [PMID: 32148813 PMCID: PMC7020308 DOI: 10.1002/fsn3.1389] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 12/04/2019] [Accepted: 12/09/2019] [Indexed: 02/06/2023] Open
Abstract
Dietary advanced glycation end products (dAGE) have profound negative effects on overall health, and their intake must be assessed. In this cross-sectional study, we investigated dAGE intake of 337 adult participants (180/157:M/F; age range 50-73 years). Data were collected on anthropometrics, body composition, dietary intake, selected blood biochemistry, immunological parameters, and antiradical capacity (50% hemolysis time; HT50). From the dietary data, dAGEs and phytochemical index (PI) were calculated. Mean BMI, % body fat (%BF), and fasting plasma glucose were all within the accepted normal range. Subjects with high dAGE intake had higher %BF, higher energy intake, and lower PI. They tended to have lower CD4/CD8 ratios and higher proportions of B cells and NK cells, but had significantly higher hs-CRP levels and lower HT50 values. Results on HT50 suggested that being >60 years of age enhanced dAGE-associated impairment of defense capacity in both those with low and high HT50 compared with those <60 years of age. Thus, overall dAGE consumption was high, but elderly participants had lower dAGE intake than younger adults. Indicators of nutritional status and immunological parameters of the subjects were found to be associated with dAGE intake, suggesting a potential impact on health.
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Affiliation(s)
- Ali Madi Almajwal
- Clinical Nutrition ProgramDepartment of Community Health SciencesCollege of Applied Medical SciencesKing Saud UniversityRiyadhSaudi Arabia
| | - Iftikhar Alam
- Clinical Nutrition ProgramDepartment of Community Health SciencesCollege of Applied Medical SciencesKing Saud UniversityRiyadhSaudi Arabia
- Department of Human Nutrition & DieteticsBacha Khan University CharsaddaCharsaddaPakistan
| | - Mahmoud Abulmeaty
- Clinical Nutrition ProgramDepartment of Community Health SciencesCollege of Applied Medical SciencesKing Saud UniversityRiyadhSaudi Arabia
| | - Suhail Razak
- Clinical Nutrition ProgramDepartment of Community Health SciencesCollege of Applied Medical SciencesKing Saud UniversityRiyadhSaudi Arabia
| | - Graham Pawelec
- Department of ImmunologyUniversity of TübingenTübingenGermany
- Health Sciences North Research InstituteSudburyONCanada
| | - Wajid Alam
- Oral and Maxillofacial SurgeryKhyber College of DentistryPeshawarPakistan
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6
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Alam I, Alam W, Aljuraiban GS, Abulmeaty M, Shivappa N, Razak S. Nutritional, immunological and antioxidant defense status of outpatients diagnosed with colorectal cancer - a case-control study of the little-studied population. Nutr Cancer 2019; 72:1307-1320. [PMID: 31591902 DOI: 10.1080/01635581.2019.1673448] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This cross-sectional study was conducted to investigate nutritional and immunological status of colorectal cancer (CRC) patients in a little-studied population from developing country, Pakistan. Data on 81 CRC patients and 37 healthy controls (HCs) were collected on nutritional status, nutrient intake, percent body fat (%BF), selected immunological parameters, phytochemical index (PI), healthy eating index (HEI), and prognostic nutrition index (PNI). Blood samples were used for immunological and antiradical defense potential (expressed as 50% hemolysis time; HT50). Results show 40/81 (49.4%) patients reported weight loss in past 3-6 mo, Significant differences were found in HEI values between patients vs. HCs, and between patients in low vs. high PNI groups (P, for all trends <0.05). Patients in the higher PNI group were heavier, had higher % BF, higher energy intake, and higher PI score as compared to patients in the low PNI group (P < 0.05). Low PNI was positively associated with non-significantly lower CD4:CD8 ratios, higher B-cells and NK cells (P, for all trends >0.05), but with significantly higher hs-CRP levels, and lower HT50 values (P, for all trends <0.001). In conclusion, CRC patients in a little-studied population have compromised nutritional and immunological health with lower HEI and PNI scores.
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Affiliation(s)
- Ifitikhar Alam
- Clinical Nutrition Program, Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Wajid Alam
- Oral and Maxillofacial Surgery, Khyber College of Dentistry, KPK, Peshawar, Pakistan
| | - Ghadeer S Aljuraiban
- Clinical Nutrition Program, Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Mahmoud Abulmeaty
- Clinical Nutrition Program, Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Nitin Shivappa
- Cancer Prevention and Control Program, University of South Carolina, Columbia, SC, USA
| | - Suhail Razak
- Clinical Nutrition Program, Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
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7
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Tompa A, Nilsson-Bowers A, Faresjö M. Subsets of CD4+, CD8+, and CD25hi Lymphocytes Are in General Not Influenced by Isolation and Long-Term Cryopreservation. THE JOURNAL OF IMMUNOLOGY 2018; 201:1799-1809. [DOI: 10.4049/jimmunol.1701409] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 07/12/2018] [Indexed: 12/21/2022]
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8
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Verschoor CP, Kohli V, Balion C. A comprehensive assessment of immunophenotyping performed in cryopreserved peripheral whole blood. CYTOMETRY PART B-CLINICAL CYTOMETRY 2017; 94:662-670. [DOI: 10.1002/cyto.b.21526] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 03/22/2017] [Accepted: 03/28/2017] [Indexed: 01/23/2023]
Affiliation(s)
- Chris P. Verschoor
- Department of Pathology and Molecular Medicine; McMaster University; Hamilton Ontario Canada
- Canadian Longitudinal Study on Aging; Hamilton Ontario Canada
| | - Vikas Kohli
- Department of Pathology and Molecular Medicine; McMaster University; Hamilton Ontario Canada
- Canadian Longitudinal Study on Aging; Hamilton Ontario Canada
| | - Cynthia Balion
- Department of Pathology and Molecular Medicine; McMaster University; Hamilton Ontario Canada
- Canadian Longitudinal Study on Aging; Hamilton Ontario Canada
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9
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Bailur JK, Pawelec G, Hatse S, Brouwers B, Smeets A, Neven P, Laenen A, Wildiers H, Shipp C. Immune profiles of elderly breast cancer patients are altered by chemotherapy and relate to clinical frailty. Breast Cancer Res 2017; 19:20. [PMID: 28241844 PMCID: PMC5330012 DOI: 10.1186/s13058-017-0813-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/06/2017] [Indexed: 01/12/2023] Open
Abstract
Background Effective therapeutic management of elderly patients with cancer, on an individual basis, remains a clinical challenge. Here, we identify novel biomarkers to assess elderly patients (≥70 years of age) with breast cancer undergoing treatment with or without chemotherapy. Methods We performed comprehensive geriatric assessment and measured markers sensitive to alteration in ageing, including leukocyte telomere length, CMV serostatus, levels of circulating growth factors and cytokines, and immune profiling of T cell and myeloid populations in blood before and at 3 months and 12 months after initiation of therapy, using flow cytometry. Results We observed changes in immune profiles over time that were specific to patients receiving chemotherapy; these patients had elevated CD4+ T effector memory re-expressing CD45RA (TEMRA) cells and relatively lower CD8+ central memory cells at 3 months, with normalized levels after 12 months. Patients’ baseline immune profiles correlated with markers such as telomere length, cytomegalovirus (CMV) serostatus and levels of circulating cytokines. We also identified correlations between baseline immune profile and geriatric assessment, i.e. more frail patients had higher levels of granulocytic cells but lower levels of cells with suppressor phenotypes including myeloid-derived suppressor cells and regulatory T cells, although none of the examined immune populations correlated with chronological age. Importantly, immune profiles prior to therapy predicted unexpected hospitalizations in patients receiving chemotherapy. Conclusion These findings suggest that immune profiling may represent a novel complementary approach to more accurately assess the global health status of the elderly patient with breast cancer and select the most appropriate individual treatment option. Trial registration ClinicalTrials.gov, NCT00849758. Registered on 20 February 2009. Electronic supplementary material The online version of this article (doi:10.1186/s13058-017-0813-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jithendra Kini Bailur
- Department of Internal Medicine II, University Hospital Tübingen, Waldhörnlestr. 22, 72072, Tübingen, Germany.,Present: Yale Cancer Center, Yale University School of Medicine, New Haven, 06510, CT, USA
| | - Graham Pawelec
- Department of Internal Medicine II, University Hospital Tübingen, Waldhörnlestr. 22, 72072, Tübingen, Germany
| | - Sigrid Hatse
- Laboratory of Experimental Oncology (LEO), Department of Oncology, KU Leuven, Leuven, Belgium.,Department of General Medical Oncology, University Hospital Leuven, Leuven Cancer Institute, Leuven, Belgium
| | - Barbara Brouwers
- Laboratory of Experimental Oncology (LEO), Department of Oncology, KU Leuven, Leuven, Belgium.,Department of General Medical Oncology, University Hospital Leuven, Leuven Cancer Institute, Leuven, Belgium
| | - Ann Smeets
- Leuven Multidisciplinary Breast Center, University Hospital Leuven, Leuven, Belgium
| | - Patrick Neven
- Leuven Multidisciplinary Breast Center, University Hospital Leuven, Leuven, Belgium
| | - Annouschka Laenen
- Interuniversity Center for Biostatistics and Statistical Bioinformatics, Leuven, Belgium
| | - Hans Wildiers
- Laboratory of Experimental Oncology (LEO), Department of Oncology, KU Leuven, Leuven, Belgium.,Department of General Medical Oncology, University Hospital Leuven, Leuven Cancer Institute, Leuven, Belgium.,Leuven Multidisciplinary Breast Center, University Hospital Leuven, Leuven, Belgium
| | - Christopher Shipp
- Department of Internal Medicine II, University Hospital Tübingen, Waldhörnlestr. 22, 72072, Tübingen, Germany.
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Hamot G, Ammerlaan W, Mathay C, Kofanova O, Betsou F. Method Validation for Automated Isolation of Viable Peripheral Blood Mononuclear Cells. Biopreserv Biobank 2015; 13:152-63. [DOI: 10.1089/bio.2014.0054] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Gael Hamot
- Integrated BioBank of Luxemburg (IBBL), Luxembourg
| | | | - Conny Mathay
- Integrated BioBank of Luxemburg (IBBL), Luxembourg
| | | | - Fay Betsou
- Integrated BioBank of Luxemburg (IBBL), Luxembourg
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11
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Association of chronic hepatitis C infection with T-cell phenotypes in HIV-negative and HIV-positive women. J Acquir Immune Defic Syndr 2014; 67:295-303. [PMID: 25314250 DOI: 10.1097/qai.0000000000000310] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Hepatitis C virus (HCV) viremia is thought to have broad systemic effects on the cellular immune system that go beyond its impact on just those T cells that are HCV specific. However, previous studies of chronic HCV and circulating T-cell subsets (activation and differentiation phenotypes) in HIV negatives used general population controls, rather than a risk-appropriate comparison group. Studies in HIV positives did not address overall immune status (total CD4⁺ count). METHODS We used fresh blood from HIV-positive and at-risk HIV-negative women, with and without chronic HCV, to measure percentages of activated CD4⁺ and CD8⁺ T cells, Tregs, and T-cell differentiation phenotypes (naive, central memory, effector memory (EM), and terminally differentiated effector). This included 158 HIV negatives and 464 HIV positives, of whom 18 and 63, respectively, were HCV viremic. RESULTS In multivariate models of HIV negatives, HCV viremia was associated with 25% fewer naive CD4⁺ (P = 0.03), 33% more EM CD4⁺ (P = 0.0002), and 37% fewer central memory CD8⁺ (P = 0.02) T cells. Among HIV positives, we observed only 1 of these 3 relationships: higher percentage of EM CD4⁺ among HCV viremic women. Furthermore, the association with EM CD4⁺ among HIV positives was limited to individuals with diminished immune status (total CD4⁺ count ≤500 cells/μL), as were associations of HCV viremia with higher percentages of activated CD4⁺ and Tregs. Among HIV positives with high CD4⁺ count, no significant associations were observed. CONCLUSIONS These data suggest that HCV viremia in HIV negatives is associated with accelerated T-cell differentiation, but among HIV positives, the impact of HCV viremia is less straightforward and varies by total CD4v count.
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12
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Alam I, Goldeck D, Larbi A, Pawelec G. Aging affects the proportions of T and B cells in a group of elderly men in a developing country--a pilot study from Pakistan. AGE (DORDRECHT, NETHERLANDS) 2013; 35:1521-30. [PMID: 22810104 PMCID: PMC3776124 DOI: 10.1007/s11357-012-9455-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/04/2012] [Indexed: 05/22/2023]
Abstract
Immune status is different in the elderly and the young, but whether age-associated differences are similar in developing and industrialized countries is unclear. To approach this question, peripheral blood immune cell phenotypes were analyzed by polychromatic flow cytometry in 50 young and 50 elderly men in a pilot study in a rural area of Pakistan. As a group, the elderly had a significantly lower CD4:CD8 ratio, a lower percentage of CD8+ naïve T cells, and significantly higher percentage of late-differentiated memory cells than the young. No age-associated differences were seen in B cells or NK cells. CD8+ cells as a percentage of CD3+ T cells were positively associated with plasma CRP levels but not other factors. We conclude that there are differences between the peripheral immune cell phenotypes of young and elderly Pakistani men and that these seem broadly similar to those more extensively documented in industrialized countries, despite the marked societal, nutritional, and many other differences in these populations.
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Affiliation(s)
- Iftikhar Alam
- />Tübingen Ageing and Tumour Immunology Group, Zentrum für Medizinische Forschung, University of Tübingen, Waldhörnlestraße 22, 72072 Tübingen, Germany
- />Department of Agriculture, Khyber Pakhtunkhwa (Previously: NWFP), Abdul Wali Khan University, Mardan, Pakistan
| | - David Goldeck
- />Tübingen Ageing and Tumour Immunology Group, Zentrum für Medizinische Forschung, University of Tübingen, Waldhörnlestraße 22, 72072 Tübingen, Germany
| | - Anis Larbi
- />Singapore Immunology Network (SIgN), Biopolis, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Graham Pawelec
- />Tübingen Ageing and Tumour Immunology Group, Zentrum für Medizinische Forschung, University of Tübingen, Waldhörnlestraße 22, 72072 Tübingen, Germany
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Goldeck D, Larbi A, Pellicanó M, Alam I, Zerr I, Schmidt C, Fulop T, Pawelec G. Enhanced Chemokine Receptor Expression on Leukocytes of Patients with Alzheimer's Disease. PLoS One 2013; 8:e66664. [PMID: 23824053 PMCID: PMC3688934 DOI: 10.1371/journal.pone.0066664] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Accepted: 05/08/2013] [Indexed: 01/23/2023] Open
Abstract
Although primarily a neurological complaint, systemic inflammation is present in Alzheimer's Disease, with higher than normal levels of proinflammatory cytokines and chemokines in the periphery as well as the brain. A gradient of these factors may enhance recruitment of activated immune cells into the brain via chemotaxis. Here, we investigated the phenotypes of circulating immune cells in AD patients with multi-colour flow cytometry to determine whether their expression of chemokine receptors is consistent with this hypothesis. In this study, we confirmed our previously reported data on the shift of early- to late-differentiated CD4+ T-cells in AD patients. The percentage of cells expressing CD25, a marker of acute T-cell activation, was higher in patients than in age-matched controls, and percentages of CCR6+ cells were elevated. This chemokine receptor is primarily expressed on pro-inflammatory memory cells and Th17 cells. The proportion of cells expressing CCR4 (expressed on Th2 cells) and CCR5 (Th1 cells and dendritic cells) was also greater in patients, and was more pronounced on CD4+ than CD8+ T-cells. These findings allow a more detailed insight into the systemic immune status of patients with Alzheimer's disease and suggest possible novel targets for immune therapy.
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Affiliation(s)
- David Goldeck
- Tübingen Ageing and Tumour Immunology Group, Center for Medical Research, University of Tübingen, Tübingen, Germany
- * E-mail:
| | - Anis Larbi
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research, Biopolis, Singapore, Singapore
| | - Mariavaleria Pellicanó
- Tübingen Ageing and Tumour Immunology Group, Center for Medical Research, University of Tübingen, Tübingen, Germany
| | - Iftikhar Alam
- Tübingen Ageing and Tumour Immunology Group, Center for Medical Research, University of Tübingen, Tübingen, Germany
- Abdul Wali Khan University, Mardan, Pakistan
| | - Inga Zerr
- Clinical Dementia Center, Dept. of Neurology, University Medical School, Georg August University, Göttingen, Germany
| | - Christian Schmidt
- Clinical Dementia Center, Dept. of Neurology, University Medical School, Georg August University, Göttingen, Germany
| | - Tamas Fulop
- Immunology Program, Geriatric Division, Faculty of Medicine, Research Center on Aging, University of Sherbrooke, Sherbrooke, Quebec, Canada
| | - Graham Pawelec
- Tübingen Ageing and Tumour Immunology Group, Center for Medical Research, University of Tübingen, Tübingen, Germany
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Alam I, Larbi A, Pawelec G. Nutritional status influences peripheral immune cell phenotypes in healthy men in rural Pakistan. IMMUNITY & AGEING 2012; 9:16. [PMID: 22863368 PMCID: PMC3488561 DOI: 10.1186/1742-4933-9-16] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 07/26/2012] [Indexed: 11/17/2022]
Abstract
Immune status is influenced by malnutrition, but how this factor interacts in developing countries and whether these differences are similar to those determined in industrialized countries, is unclear. To establish whether malnutrition-associated immune profiles in a developing country are similar to those in industrialized countries we analyzed peripheral blood immune cell phenotypes by polychromatic flow cytometry in 50 young and 50 elderly subjects. Data on anthropometrics and diet were collected through interviews. Plasma samples were analyzed for common clinical chemistry variables. Subjects in 4 BMI categories differed in their immune parameters demonstrating influence of nutritional status on immunity. This was greater within the young group and affected the CD4 subset more profoundly than the CD8 subset. No nutrition-associated differences were seen in B or NK cells. CD8+ cells as a percentage of CD3+ T cells were positively associated with plasma CRP levels but not other factors. We conclude that there are differences in the immune signatures of obese, overweight and underweight versus normal-weight young and elderly, which seem broadly similar to the more extensively-documented state reported in industrialized countries, despite the marked societal, nutritional and many other differences.
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Affiliation(s)
- Iftikhar Alam
- Tübingen Ageing and Tumour Immunology Group, Zentrum für Medizinische Forschung, University of Tübingen, Waldhörnlestraße 22, D-72072, Tübingen, Germany.
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