1
|
Browne DJ, Miller CM, Doolan DL. Technical pitfalls when collecting, cryopreserving, thawing, and stimulating human T-cells. Front Immunol 2024; 15:1382192. [PMID: 38812513 PMCID: PMC11133553 DOI: 10.3389/fimmu.2024.1382192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 04/29/2024] [Indexed: 05/31/2024] Open
Abstract
The collection, cryopreservation, thawing, and culture of peripheral blood mononuclear cells (PBMCs) can profoundly influence T cell viability and immunogenicity. Gold-standard PBMC processing protocols have been developed by the Office of HIV/AIDS Network Coordination (HANC); however, these protocols are not universally observed. Herein, we have explored the current literature assessing how technical variation during PBMC processing can influence cellular viability and T cell immunogenicity, noting inconsistent findings between many of these studies. Amid the mounting concerns over scientific replicability, there is growing acknowledgement that improved methodological rigour and transparent reporting is required to facilitate independent reproducibility. This review highlights that in human T cell studies, this entails adopting stringent standardised operating procedures (SOPs) for PBMC processing. We specifically propose the use of HANC's Cross-Network PBMC Processing SOP, when collecting and cryopreserving PBMCs, and the HANC member network International Maternal Pediatric Adolescent AIDS Clinical Trials (IMPAACT) PBMC Thawing SOP when thawing PBMCs. These stringent and detailed protocols include comprehensive reporting procedures to document unavoidable technical variations, such as delayed processing times. Additionally, we make further standardisation and reporting recommendations to minimise and document variability during this critical experimental period. This review provides a detailed overview of the challenges inherent to a procedure often considered routine, highlighting the importance of carefully considering each aspect of SOPs for PBMC collection, cryopreservation, thawing, and culture to ensure accurate interpretation and comparison between studies.
Collapse
Affiliation(s)
- Daniel J. Browne
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, QLD, Australia
| | - Catherine M. Miller
- College of Medicine and Dentistry, James Cook University, Cairns, QLD, Australia
| | - Denise L. Doolan
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD, Australia
| |
Collapse
|
2
|
Berliner KE, Ezzelle T, Klenk T, Dunn G, Sischo J, Campbell D, McKee KT. Rapid Establishment of a Biospecimen Resource To Study the Global Impact of COVID-19 Vaccines. Microbiol Spectr 2023; 11:e0211723. [PMID: 37367491 PMCID: PMC10434269 DOI: 10.1128/spectrum.02117-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 06/05/2023] [Indexed: 06/28/2023] Open
Abstract
The emergence and explosive spread of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in 2019 highlighted the need to rapidly develop curated biobanks to inform the etiology, diagnosis, and treatment options for global outbreaks of communicable diseases. Recently, we undertook efforts to develop a repository of biospecimens from individuals aged 12 and older who were to be vaccinated against coronavirus disease 19 (COVID-19) with vaccines developed with support from the United States Government. We planned to establish 40 or more clinical study sites in at least six countries to collect biospecimens from 1,000 individuals, 75% of whom were to be SARS-CoV-2 naive at the time of enrollment. Specimens would be used to (i) ensure quality control of future diagnostic tests, (ii) understand immune responses to multiple COVID-19 vaccines, and (iii) provide reference reagents for the development of new drugs, biologics, and vaccines. Biospecimens included serum, plasma, whole blood, and nasal secretions. Large-volume collections of peripheral blood mononuclear cells (PBMCs) and defibrinated plasma were also planned for a subset of subjects. Participant sampling was planned at intervals prior to and following vaccination over a 1-year period. Here, we describe the selection of clinical sites for specimen collection and processing, standard operating procedure (SOP) development, design of a training program for tracking specimen quality, and specimen transport to a repository for interim storage. This approach allowed us to enroll our first participants within 21 weeks from the study's initiation. Lessons learned from this experience should benefit the development of biobanks in response to future global epidemics. IMPORTANCE The ability to rapidly create a biobank of high-quality specimens in response to emergent infectious diseases is critical to allow for the development of prevention and treatment, as well as to effectively monitor the spread of the disease. In this paper, we report on a novel approach to getting global clinical sites up and running within a short time frame and to monitor the quality of specimens collected to ensure their value in future research efforts. Our results have important implications for the monitoring of the quality of biospecimens collected and to design effective interventions to address shortcomings, where needed.
Collapse
Affiliation(s)
| | | | - T. Klenk
- Allucent, Cary, North Carolina, USA
| | - G. Dunn
- Allucent, Cary, North Carolina, USA
| | | | | | | |
Collapse
|
3
|
Thébault P, Cailhier JF, Lapointe R. Blood Sample Processing and Banking for Functional and Molecular Analyses. Methods Mol Biol 2023; 2614:37-46. [PMID: 36587117 DOI: 10.1007/978-1-0716-2914-7_3] [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: 01/02/2023]
Abstract
Immune monitoring of circulating immune cells in the blood provides insight into a patient's own immune response over the course of a treatment or disease progression. Information such as whether immune cells are functional or non-functional and what specific proteins they express or secrete can be essential to understand if (and how) a treatment is working or a disease is progressing. To do so, it requires careful handling and storage of precious biological samples with the goals of obtaining a large amount of information from limited samples and minimizing future research costs by the use of banked samples. Many factors, including blood sample types, time of collection, containers used, preservatives and other additives, transport means, and length of transit time, all affect the quality of the samples and the stability of biomarkers and must be considered at the initial collection stage. An efficient study design includes provisions for further processing of the original samples, such as cryopreservation of isolated cells, purification of DNA and RNA, and preparation of specimens for genomic, immunological, and biochemical analyses. Development of standard operating procedures and quality control plans is a safeguard of the samples' quality and of the validity of the results. Here, we focus on the collection and processing of blood suitable for plasma and peripheral blood mononuclear cell (PBMC) banking, including collection, processing, and storage of samples, based on our experience.
Collapse
Affiliation(s)
- Paméla Thébault
- Axe Cancer, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.,Institut du cancer de Montréal, Montréal, QC, Canada
| | - Jean-François Cailhier
- Axe Cancer, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.,Institut du cancer de Montréal, Montréal, QC, Canada.,Faculté de Médecine, Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Réjean Lapointe
- Axe Cancer, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada. .,Institut du cancer de Montréal, Montréal, QC, Canada. .,Faculté de Médecine, Département de Médecine, Université de Montréal, Montréal, QC, Canada.
| |
Collapse
|
4
|
Burnie J, Persaud AT, Thaya L, Liu Q, Miao H, Grabinsky S, Norouzi V, Lusso P, Tang VA, Guzzo C. P-selectin glycoprotein ligand-1 (PSGL-1/CD162) is incorporated into clinical HIV-1 isolates and can mediate virus capture and subsequent transfer to permissive cells. Retrovirology 2022; 19:9. [PMID: 35597982 PMCID: PMC9123692 DOI: 10.1186/s12977-022-00593-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 04/21/2022] [Indexed: 11/16/2022] Open
Abstract
Background P-selectin glycoprotein ligand-1 (PSGL-1/CD162) has been studied extensively for its role in mediating leukocyte rolling through interactions with its cognate receptor, P-selectin. Recently, PSGL-1 was identified as a novel HIV-1 host restriction factor, particularly when expressed at high levels in the HIV envelope. Importantly, while the potent antiviral activity of PSGL-1 has been clearly demonstrated in various complementary model systems, the breadth of PSGL-1 incorporation across genetically diverse viral isolates and clinical isolates has yet to be described. Additionally, the biological activity of virion-incorporated PSGL-1 has also yet to be shown. Results Herein we assessed the levels of PSGL-1 on viruses produced through transfection with various amounts of PSGL-1 plasmid DNA (0–250 ng), compared to levels of PSGL-1 on viruses produced through infection of T cell lines and primary PBMC. We found that very low levels of PSGL-1 plasmid DNA (< 2.5 ng/well) were necessary to generate virus models that could closely mirror the phenotype of viruses produced via infection of T cells and PBMC. Unique to this study, we show that PSGL-1 is incorporated in a broad range of HIV-1 and SIV isolates and that virions with incorporated PSGL-1 are detectable in plasma from viremic HIV-1-infected individuals, corroborating the relevance of PSGL-1 in natural infection. Additionally, we show that PSGL-1 on viruses can bind its cognate selectin receptors, P-, E-, and L-selectins. Finally, we show viruses with endogenous levels of PSGL-1 can be captured by P-selectin and transferred to HIV-permissive bystander cells, highlighting a novel role for PSGL-1 in HIV-1 infection. Notably, viruses which contained high levels of PSGL-1 were noninfectious in our hands, in line with previous findings reporting the potent antiviral activity of PSGL-1. Conclusions Our results indicate that levels of PSGL-1 incorporation into virions can vary widely among model systems tested, and that careful tailoring of plasmid levels is required to recapitulate physiological systems when using pseudovirus models. Taken together, our data suggest that PSGL-1 may play diverse roles in the physiology of HIV-1 infection, particularly due to the functionally active state of PSGL-1 on virion surfaces and the breadth of PSGL-1 incorporation among a wide range of viral isolates. Supplementary Information The online version contains supplementary material available at 10.1186/s12977-022-00593-5.
Collapse
Affiliation(s)
- Jonathan Burnie
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada
| | - Arvin Tejnarine Persaud
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada
| | - Laxshaginee Thaya
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada
| | - Qingbo Liu
- Viral Pathogenesis Section, Laboratory of Immunoregulation (LIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Huiyi Miao
- Viral Pathogenesis Section, Laboratory of Immunoregulation (LIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Stephen Grabinsky
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - Vanessa Norouzi
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - Paolo Lusso
- Viral Pathogenesis Section, Laboratory of Immunoregulation (LIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Vera A Tang
- Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, Flow Cytometry and Virometry Core Facility, University of Ottawa, Ottawa, ON, Canada
| | - Christina Guzzo
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada. .,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada.
| |
Collapse
|
5
|
Persaud AT, Burnie J, Thaya L, DSouza L, Martin S, Guzzo C. A UV-LED module that is highly effective at inactivating human coronaviruses and HIV-1. Virol J 2022; 19:29. [PMID: 35144624 PMCID: PMC8829982 DOI: 10.1186/s12985-022-01754-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/24/2022] [Indexed: 11/10/2022] Open
Abstract
Ultraviolet (UV) light has previously been established as useful method of disinfection, with demonstrated efficacy to inactivate a broad range of microorganisms. The advent of ultraviolet light-emitting diodes provides advantages in ease of disinfection, in that there can be delivery of germicidal UV with the same light unit that delivers standard white light to illuminate a room. Herein we demonstrate the efficacy and feasibility of ultraviolet light-emitting diodes as a means of decontamination by inactivating two distinct virus models, human coronavirus 229E and human immunodeficiency virus. Importantly, the same dose of ultraviolet light that inactivated human viruses also elicited complete inactivation of ultraviolet-resistant bacterial spores (Bacillus pumilus), a gold standard for demonstrating ultraviolet-mediated disinfection. This work demonstrates that seconds of ultraviolet light-emitting diodes (UV-LED) exposure can inactivate viruses and bacteria, highlighting that UV-LED could be a useful and practical tool for broad sanitization of public spaces.
Collapse
Affiliation(s)
- Arvin T Persaud
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Room SW560, Toronto, ON, M1C 1A4, Canada
- Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, M5S 3G5, Canada
| | - Jonathan Burnie
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Room SW560, Toronto, ON, M1C 1A4, Canada
- Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, M5S 3G5, Canada
| | - Laxshaginee Thaya
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Room SW560, Toronto, ON, M1C 1A4, Canada
- Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, M5S 3G5, Canada
| | - Liann DSouza
- Safe Antiviral Technologies Inc, 822 Manning Ave, Toronto, ON, M6G 2W8, Canada
| | - Steven Martin
- Safe Antiviral Technologies Inc, 822 Manning Ave, Toronto, ON, M6G 2W8, Canada
| | - Christina Guzzo
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Room SW560, Toronto, ON, M1C 1A4, Canada.
- Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, M5S 3G5, Canada.
| |
Collapse
|
6
|
Hope CM, Huynh D, Wong YY, Oakey H, Perkins GB, Nguyen T, Binkowski S, Bui M, Choo AYL, Gibson E, Huang D, Kim KW, Ngui K, Rawlinson WD, Sadlon T, Couper JJ, Penno MAS, Barry SC. Optimization of Blood Handling and Peripheral Blood Mononuclear Cell Cryopreservation of Low Cell Number Samples. Int J Mol Sci 2021; 22:ijms22179129. [PMID: 34502038 PMCID: PMC8431655 DOI: 10.3390/ijms22179129] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/14/2021] [Accepted: 08/19/2021] [Indexed: 11/16/2022] Open
Abstract
Background: Rural/remote blood collection can cause delays in processing, reducing PBMC number, viability, cell composition and function. To mitigate these impacts, blood was stored at 4 °C prior to processing. Viable cell number, viability, immune phenotype, and Interferon-γ (IFN-γ) release were measured. Furthermore, the lowest protective volume of cryopreservation media and cell concentration was investigated. Methods: Blood from 10 individuals was stored for up to 10 days. Flow cytometry and IFN-γ ELISPOT were used to measure immune phenotype and function on thawed PBMC. Additionally, PBMC were cryopreserved in volumes ranging from 500 µL to 25 µL and concentration from 10 × 106 cells/mL to 1.67 × 106 cells/mL. Results: PBMC viability and viable cell number significantly reduced over time compared with samples processed immediately, except when stored for 24 h at RT. Monocytes and NK cells significantly reduced over time regardless of storage temperature. Samples with >24 h of RT storage had an increased proportion in Low-Density Neutrophils and T cells compared with samples stored at 4 °C. IFN-γ release was reduced after 24 h of storage, however not in samples stored at 4 °C for >24 h. The lowest protective volume identified was 150 µL with the lowest density of 6.67 × 106 cells/mL. Conclusion: A sample delay of 24 h at RT does not impact the viability and total viable cell numbers. When long-term delays exist (>4 d) total viable cell number and cell viability losses are reduced in samples stored at 4 °C. Immune phenotype and function are slightly altered after 24 h of storage, further impacts of storage are reduced in samples stored at 4 °C.
Collapse
Affiliation(s)
- Christopher M. Hope
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
- Women’s and Children’s Hospital, Adelaide, SA 5006, Australia
| | - Dao Huynh
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
| | - Ying Ying Wong
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
| | - Helena Oakey
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
| | - Griffith Boord Perkins
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
| | - Trung Nguyen
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
| | - Sabrina Binkowski
- Children’s Diabetes Centre, Telethon Kids Institute, The University of Western Australia, Perth, WA 6009, Australia; (S.B.); (A.Y.L.C.)
| | - Minh Bui
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia;
| | - Ace Y. L. Choo
- Children’s Diabetes Centre, Telethon Kids Institute, The University of Western Australia, Perth, WA 6009, Australia; (S.B.); (A.Y.L.C.)
| | - Emily Gibson
- School of Women’s and Children’s Health, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia; (E.G.); (K.W.K.); (W.D.R.)
| | - Dexing Huang
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC 3052, Australia; (D.H.); (K.N.)
| | - Ki Wook Kim
- School of Women’s and Children’s Health, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia; (E.G.); (K.W.K.); (W.D.R.)
- Virology Research Laboratory, Serology and Virology Division, NSW Health Pathology, Prince of Wales Hospital, Sydney, NSW 2031, Australia
| | - Katrina Ngui
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC 3052, Australia; (D.H.); (K.N.)
| | - William D. Rawlinson
- School of Women’s and Children’s Health, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia; (E.G.); (K.W.K.); (W.D.R.)
- Virology Research Laboratory, Serology and Virology Division, NSW Health Pathology, Prince of Wales Hospital, Sydney, NSW 2031, Australia
| | - Timothy Sadlon
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
| | - Jennifer J. Couper
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
- Women’s and Children’s Hospital, Adelaide, SA 5006, Australia
| | - Megan A. S. Penno
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
| | - Simon C. Barry
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (C.M.H.); (D.H.); (Y.Y.W.); (H.O.); (G.B.P.); (T.N.); (T.S.); (J.J.C.); (M.A.S.P.)
- Women’s and Children’s Hospital, Adelaide, SA 5006, Australia
- Correspondence:
| | | |
Collapse
|
7
|
Xu Y, Zou Q, Gao F, Wang D, Xue S, Lin H, Guo H, He X, Yang H, Gao D. Effect of Warming Process on the Survival of Cryopreserved Human Peripheral Blood Mononuclear Cells. Biopreserv Biobank 2021; 19:318-323. [PMID: 34061624 DOI: 10.1089/bio.2020.0058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
It is well known that the warming process is a critical step in cell cryopreservation, affecting the survival rate of the cryopreserved cells. However, there is a lack of understanding and optimization of the warming process for the cryopreserved human peripheral blood mononuclear cells (PBMCs) that are greatly needed for the cellular/immune therapies worldwide. In this study, the effect of the warming process on cryosurvival of the PBMCs was investigated, resulting in a recommendation of an optimal warming method. In the experiments, all PBMC samples were cooled by a fixed slow cooling process and stored in a liquid nitrogen tank. The frozen samples were then warmed in water baths with stirring at various temperatures, 37°C, 42°C, and 65°C, respectively. After thawing, PBMC's viability as well as phenotypic and functional analyses were performed and evaluated. It was shown that a relatively rapid warming process at 65°C in a water bath with stirring generated a significant improvement of cell viability, recovery, and functionality of the cryopreserved PBMCs. In addition, interferon-γ and interleukin-2 secretion were much higher in PBMCs thawed at 65°C than that in 42°C and 37°C, respectively. This study suggests that a rapid warming process at 65°C in a water bath should be used to replace the current conventional warming approach at 37°C.
Collapse
Affiliation(s)
- Yanhong Xu
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China.,Department of Engineering Technology Research Center of Cell Therapy and Clinical Translation. Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Qiongna Zou
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China
| | - Frankliu Gao
- Department of School of Public Affairs, University of Science and Technology of China, Hefei, P.R. China
| | - Daimeng Wang
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China
| | - Suxia Xue
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China
| | - Hebei Lin
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China
| | - Hao Guo
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China
| | - Xiaowen He
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China
| | - Huanfeng Yang
- Department of Technology R&D, Origincell Technology Group, Shanghai, P.R. China.,Department of School of Life Sciences and Technology, Tongji University, Shanghai, P.R. China
| | - Dayong Gao
- Department of Mechanical Engineering, University of Washington, Seattle, Washington, USA
| |
Collapse
|
8
|
Ortega-Pinazo J, Díaz T, Martínez B, Jiménez A, Pinto-Medel MJ, Ferro P. Quality assessment on the long-term cryopreservation and nucleic acids extraction processes implemented in the andalusian public biobank. Cell Tissue Bank 2019; 20:255-265. [PMID: 30903409 DOI: 10.1007/s10561-019-09764-9] [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] [Received: 11/28/2018] [Accepted: 03/14/2019] [Indexed: 12/11/2022]
Abstract
Human samples are commonly collected and long-term stored in biobanks for current and future analyses. Even though techniques for freezing human blood are well established, the storage time can compromise the cell viability as well as the yield and quality of nucleic acids (RNA and DNA) extracted from them. In this study, a protocol to obtain peripheral blood mononuclear cells (PBMCs) from 70 subjects, which were stored at - 196 °C from EDTA tubes for a long-term, was assessed. In parallel; a protocol to obtain DNA from the same subjects, which were stored at - 80 °C from citrate tubes, was also studied. Samples stored from 2008 to 2012 were studied and the results obtained showed that there were no statistically significant differences in the RNA or DNA extracted in terms of purity, integrity and functionality The freezing protocol used by the Málaga Biobank shows that viable PBMCs and DNA could be kept for a period of, at least, 10 years, with a high quality and performance. Furthermore, RNA extracted from these PBMCs presents also a good quality and performance. Therefore, the samples frozen according to the conditions of the protocols assessed in this study could be optimal for biomedical research.
Collapse
Affiliation(s)
- J Ortega-Pinazo
- Neuroscience UGC, Instituto de Investigación Biomédica de Málaga (IBIMA), Sanitary Distric of Málaga, University of Málaga, Málaga, Spain
| | - T Díaz
- Andalusian Public Health System Biobank, Instituto de Investigación Biomédica de Málaga (IBIMA), Sanitary Distric of Málaga, University of Málaga, Málaga, Spain
| | - B Martínez
- Andalusian Public Health System Biobank, Instituto de Investigación Biomédica de Málaga (IBIMA), Sanitary Distric of Málaga, University of Málaga, Málaga, Spain
| | - A Jiménez
- Andalusian Public Health System Biobank, Instituto de Investigación Biomédica de Málaga (IBIMA), Sanitary Distric of Málaga, University of Málaga, Málaga, Spain
| | - M J Pinto-Medel
- Neuroscience UGC, Instituto de Investigación Biomédica de Málaga (IBIMA), Sanitary Distric of Málaga, University of Málaga, Málaga, Spain
| | - P Ferro
- Andalusian Public Health System Biobank, Instituto de Investigación Biomédica de Málaga (IBIMA), Sanitary Distric of Málaga, University of Málaga, Málaga, Spain.
| |
Collapse
|
9
|
Naugler C, Church DL. Clinical laboratory utilization management and improved healthcare performance. Crit Rev Clin Lab Sci 2019. [DOI: 10.1080/10408363.2018.1526164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Christopher Naugler
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Canada
- Department of Family Medicine, University of Calgary, Calgary, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, Canada
| | - Deirdre L. Church
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Canada
- Department of Medicine, University of Calgary, Calgary, Canada
| |
Collapse
|
10
|
Optimizing recovery of frozen human peripheral blood mononuclear cells for flow cytometry. PLoS One 2017; 12:e0187440. [PMID: 29091947 PMCID: PMC5665600 DOI: 10.1371/journal.pone.0187440] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/19/2017] [Indexed: 11/28/2022] Open
Abstract
Introduction Live peripheral blood mononuclear cells (PBMCs) can be frozen and thawed for later analyses by adding and removing a cryoprotectant, such as dimethyl sulfoxide (DMSO). Laboratories across the world use various procedures, but published evidence of optimal thawing procedures is scarce. Materials and methods PBMCs were separated from blood collected from healthy Danish blood donors, and stored at -80°C after adding of DMSO. The essential steps in the thawing procedure were modified and performance was evaluated by flow cytometry with respect to the percentage and total yield of viable PMBCs. Results The best-performing washing medium was Roswell Park Memorial Institute (RPMI) 1640 at 37°C with 20% fetal bovine serum. When using 10 mL washing medium in a 15-mL Falcon tube, samples should be centrifuged for at least 10 minutes at 500 g. We failed to detect any differences between the tested methods of mixing PBMCs with washing medium. Likewise, neither the thawing duration nor centrifugation temperature (20°C and 37°C) had any effect. PBMCs could be incubated (rested) for up to eight hours in a 37°C 5% CO2 incubator without affecting cell counts, but incubating PBMCs for 16 hours significantly decreased viability and recovery. In general, high viability was not necessarily associated with high recovery. Conclusion Changing the thawing procedure significantly impacted PBMC viability and live cell recovery. Evaluating both viability and live PBMC recovery are necessary to evaluate method performance. Investigation of differential loss of PBMC subtypes and phenotypic changes during thawing and incubation requires further evaluation.
Collapse
|
11
|
Ford T, Wenden C, Mbekeani A, Dally L, Cox JH, Morin M, Winstone N, Hill AVS, Gilmour J, Ewer KJ. Cryopreservation-related loss of antigen-specific IFNγ producing CD4 + T-cells can skew immunogenicity data in vaccine trials: Lessons from a malaria vaccine trial substudy. Vaccine 2017; 35:1898-1906. [PMID: 28285985 PMCID: PMC5387668 DOI: 10.1016/j.vaccine.2017.02.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 01/31/2017] [Accepted: 02/18/2017] [Indexed: 12/19/2022]
Abstract
Ex vivo functional immunoassays such as ELISpot and intracellular cytokine staining (ICS) by flow cytometry are crucial tools in vaccine development both in the identification of novel immunogenic targets and in the immunological assessment of samples from clinical trials. Cryopreservation and subsequent thawing of PBMCs via validated processes has become a mainstay of clinical trials due to processing restrictions inherent in the disparate location and capacity of trial centres, and also in the need to standardize biological assays at central testing facilities. Logistical and financial requirement to batch process samples from multiple study timepoints are also key. We used ELISpot and ICS assays to assess antigen-specific immunogenicity in blood samples taken from subjects enrolled in a phase II malaria heterologous prime-boost vaccine trial and showed that the freeze thaw process can result in a 3–5-fold reduction of malaria antigen-specific IFNγ-producing CD3+CD4+ effector populations from PBMC samples taken post vaccination. We have also demonstrated that peptide responsive CD8+ T cells are relatively unaffected, as well as CD4+ T cell populations that do not produce IFNγ. These findings contribute to a growing body of data that could be consolidated and synthesised as guidelines for clinical trials with the aim of increasing the efficiency of vaccine development pipelines.
Collapse
Affiliation(s)
- Tom Ford
- IAVI-HIL, Human Immunology Laboratory, International AIDS Vaccine Initiative, London, UK; Department of Medicine, Imperial College, London, UK.
| | - Claire Wenden
- IAVI-HIL, Human Immunology Laboratory, International AIDS Vaccine Initiative, London, UK; Department of Medicine, Imperial College, London, UK
| | - Alison Mbekeani
- IAVI-HIL, Human Immunology Laboratory, International AIDS Vaccine Initiative, London, UK; Department of Medicine, Imperial College, London, UK
| | - Len Dally
- EMMES Corporation, Rockville, MD, USA
| | - Josephine H Cox
- IAVI-HIL, Human Immunology Laboratory, International AIDS Vaccine Initiative, London, UK
| | | | - Nicola Winstone
- IAVI-HIL, Human Immunology Laboratory, International AIDS Vaccine Initiative, London, UK; Department of Medicine, Imperial College, London, UK
| | - Adrian V S Hill
- Centre for Clinical Vaccinology and Tropical Medicine and the Jenner Institute Laboratories, University of Oxford, UK
| | - Jill Gilmour
- IAVI-HIL, Human Immunology Laboratory, International AIDS Vaccine Initiative, London, UK; Department of Medicine, Imperial College, London, UK
| | - Katie J Ewer
- Centre for Clinical Vaccinology and Tropical Medicine and the Jenner Institute Laboratories, University of Oxford, UK
| |
Collapse
|
12
|
Tuluc F, Spitsin S, Tustin NB, Murray JB, Tustin R, Schankel LA, Wiznia A, Nachman S, Douglas SD. Decreased PD-1 Expression on CD8 Lymphocyte Subsets and Increase in CD8 Tscm Cells in Children with HIV Receiving Raltegravir. AIDS Res Hum Retroviruses 2017; 33:133-142. [PMID: 27615375 DOI: 10.1089/aid.2016.0108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
We investigated the effect of combination antiretroviral therapy (cART) on immune recovery, particularly on the percentages of PD-1-positive cells within the major leukocyte subsets. Cryopreserved peripheral blood mononuclear cells and plasma samples collected longitudinally from a subset of 13 children and adolescents (between 9.7 and 18.2 years old) who were enrolled in the International Maternal Pediatric Adolescent AIDS Clinical Trials (IMPAACT) P1066 were used for this study. Immunophenotyping by flow cytometry was performed to determine the effect of raltegravir-containing cART regimen on the distribution of leukocyte populations, on the expression of PD-1 on T cell subpopulations, and on the expression of well-established markers of T cell activation (CD38 and HLA-DR) on CD8 T cells. C reactive protein (CRP), lipopolysaccharide (LPS), IL-6, and soluble CD163 were assayed in plasma samples by an enzyme-linked immunosorbent assay. Plasma viral loads were decreased in all subjects (by an average of 2.9 log units). The cART regimen, including raltegravir, induced changes in CD8 T cell subsets, consistent with an effective antiretroviral outcome and improved immunologic status, including increased percentages of CD8 stem cell memory T cells (Tscm). The percentages of CD8 PD-1-positive cells decreased significantly as compared with baseline levels. Among the proinflammatory markers measured in plasma, sCD163 showed a decline that was associated with cART. cART therapy, including raltegravir, over 48 weeks in children is associated with immune restoration, consistent with effective antiretroviral therapy, namely decreased percentages of PD-1+ CD8+ T cells, an increase in CD8 Tscm cells, and decreased levels of sCD163.
Collapse
Affiliation(s)
- Florin Tuluc
- Division of Allergy and Immunology, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
- Flow Cytometry Core Laboratory, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
| | - Sergei Spitsin
- Division of Allergy and Immunology, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
| | - Nancy B. Tustin
- Division of Allergy and Immunology, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
| | - Jennifer B. Murray
- Flow Cytometry Core Laboratory, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
| | - Richard Tustin
- Division of Allergy and Immunology, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
| | - Laura A. Schankel
- Division of Allergy and Immunology, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
| | - Andrew Wiznia
- Jacobi Medical Center, Albert Einstein College of Medicine, Bronx, New York
| | - Sharon Nachman
- Department of Pediatrics, Stony Brook School of Medicine, Stony Brook, New York
| | - Steven D. Douglas
- Division of Allergy and Immunology, The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| |
Collapse
|
13
|
Angel S, von Briesen H, Oh YJ, Baller MK, Zimmermann H, Germann A. Toward Optimal Cryopreservation and Storage for Achievement of High Cell Recovery and Maintenance of Cell Viability and T Cell Functionality. Biopreserv Biobank 2016; 14:539-547. [PMID: 27792414 PMCID: PMC5180082 DOI: 10.1089/bio.2016.0046] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Cryopreservation of biological materials such as cells, tissues, and organs is a prevailing topic of high importance. It is employed not only in many research fields but also in the clinical area. Cryopreservation is of great importance for reproductive medicine and clinical studies, as well as for the development of vaccines. Peripheral blood mononuclear cells (PBMCs) are commonly used in vaccine research where comparable and reliable results between different research institutions and laboratories are of high importance. Whereas freezing and thawing processes are well studied, controlled, and standardized, storage conditions are often disregarded. To close this gap, we investigated the influence of suboptimal storage conditions during low-temperature storage on PBMC viability, recovery, and T cell functionality. For this purpose, PBMCs were isolated and exposed with help of a robotic system in a low-temperature environment from 0 up to 350 temperature fluctuation cycles in steps of 50 cycles to simulate storage conditions in large biorepositories with sample storage, removal, and sorting functions. After the simulation, the viability, recovery, and T cell functionality were analyzed to determine the number of temperature rises, which ultimately lead to significant cell damage. All studied parameters decreased with increasing number of temperature cycles. Sometimes after as little as only 50 temperature cycles, a significant effect was observed. These results are very important for all fields in which cell cryopreservation is employed, particularly for clinical and multicenter studies wherein the comparability and reproducibility of results play a crucial role. To obtain reliable results and to maintain the quality of the cells, not only the freezing and thawing processes but also the storage conditions should be controlled and standardized, and any deviations should be documented.
Collapse
Affiliation(s)
- Stephanie Angel
- 1 Fraunhofer Institute for Biomedical Engineering , Sulzbach, Germany
| | - Hagen von Briesen
- 1 Fraunhofer Institute for Biomedical Engineering , Sulzbach, Germany
| | - Young-Joo Oh
- 1 Fraunhofer Institute for Biomedical Engineering , Sulzbach, Germany
| | - Marko K Baller
- 2 University of Applied Sciences Kaiserslautern , Amerikastraße, Zweibruecken, Germany
| | - Heiko Zimmermann
- 1 Fraunhofer Institute for Biomedical Engineering , Sulzbach, Germany .,3 Department of Molecular and Cellular Biotechnology, Saarland University , Saarbruecken, Germany
| | - Anja Germann
- 1 Fraunhofer Institute for Biomedical Engineering , Sulzbach, Germany
| |
Collapse
|
14
|
Calleros-Basilio L, Cortés MA, García-Jerez A, Luengo-Rodríguez A, Orozco-Agudo A, Valdivielso JM, Rodríguez-Puyol D, Rodríguez-Puyol M. Quality Assurance of Samples and Processes in the Spanish Renal Research Network (REDinREN) Biobank. Biopreserv Biobank 2016; 14:499-510. [PMID: 27541936 DOI: 10.1089/bio.2015.0095] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Biobanks are useful platforms to build bridges between basic, translational, and clinical research and clinical care. They are repositories of high-quality human biological samples ideal for evaluating their histological characteristics and also their genome, transcriptome, and proteome. The Spanish Renal Research Network Biobank contains more than 76,500 well-preserved frozen samples of a wide variety of kidney diseases, collected from 5450 patients seen by over 70 nephrology services throughout the Spanish territory. OBJECTIVE To determine and to report the results of the quality control of samples and processes conducted in our biobank, implemented in accordance with the requirements of the ISO 9001:2008 international standard. STUDY DESIGN Two types of quality controls were performed: (1) systematic, that is, measurement of viable peripheral blood mononuclear cells (PBMCs) obtained and purity of nucleic acids and (2) ad-hoc, that is, viability of thawed PBMC, DNA extraction process reproducibility, and the integrity and functionality of nucleic acids, implemented on a routine basis. METHODS AND RESULTS PBMC isolation by Ficoll yielded reproducible results and its cryopreserved viability was >90%. Acceptable A260/A280 ratios were obtained for the vast majority of the DNA (n = 2328) and RNA (n = 78) samples analyzed. DNA integrity was demonstrated by agarose gels and by β-globulin gene polymerase chain reaction (PCR) amplification of 1327 and 989 bp fragments. DNA of acceptable quality had at least three bands of β-globulin amplified obtained (n = 26/30). RNA integrity number (RIN) determinations obtained RIN numbers ≥7 (n = 87/96). The amplifiability of nucleic acids was confirmed by qPCR and RT-qPCR of β-actin and GAPDH genes. Long storage or delayed processing time did not affect the quality of the samples analyzed. The processes of DNA extraction also yielded reproducible results. CONCLUSIONS These results clearly indicate that our PBMC, DNA, and RNA stored samples meet the required quality standards to be used for biomedical research, ensuring their long-term preservation.
Collapse
Affiliation(s)
- Laura Calleros-Basilio
- 1 Physiology Unit, Department of Systems Biology, Medicine School, Alcala University , Madrid, Spain .,2 IRSIN and REDinREN (Instituto de Salud Carlos III), Madrid, Spain
| | - María Alicia Cortés
- 3 CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Medicine School, Universidad Nacional del Nordeste , Corrientes, Argentina
| | - Andrea García-Jerez
- 1 Physiology Unit, Department of Systems Biology, Medicine School, Alcala University , Madrid, Spain .,2 IRSIN and REDinREN (Instituto de Salud Carlos III), Madrid, Spain
| | - Alicia Luengo-Rodríguez
- 1 Physiology Unit, Department of Systems Biology, Medicine School, Alcala University , Madrid, Spain .,2 IRSIN and REDinREN (Instituto de Salud Carlos III), Madrid, Spain
| | - Ana Orozco-Agudo
- 1 Physiology Unit, Department of Systems Biology, Medicine School, Alcala University , Madrid, Spain .,2 IRSIN and REDinREN (Instituto de Salud Carlos III), Madrid, Spain
| | - José Manuel Valdivielso
- 2 IRSIN and REDinREN (Instituto de Salud Carlos III), Madrid, Spain .,4 Department of Experimental Nephrology, Institut de Recerca Biomédica de Lleida, Universitat de Lleida , Lleida, Spain
| | - Diego Rodríguez-Puyol
- 2 IRSIN and REDinREN (Instituto de Salud Carlos III), Madrid, Spain .,5 Nephrology Section and Research Unit, Hospital Universitario Príncipe de Asturias , Alcalá de Henares, Madrid, Spain
| | - Manuel Rodríguez-Puyol
- 1 Physiology Unit, Department of Systems Biology, Medicine School, Alcala University , Madrid, Spain .,2 IRSIN and REDinREN (Instituto de Salud Carlos III), Madrid, Spain
| |
Collapse
|
15
|
Perdomo-Celis F, Salgado DM, Castañeda DM, Narváez CF. Viability and Functionality of Cryopreserved Peripheral Blood Mononuclear Cells in Pediatric Dengue. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2016; 23:417-426. [PMID: 26961858 PMCID: PMC4860468 DOI: 10.1128/cvi.00038-16] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 03/04/2016] [Indexed: 12/30/2022]
Abstract
Cryopreserved peripheral blood mononuclear cells (PBMCs) are widely used in studies of dengue. In this disease, elevated frequency of apoptotic PBMCs has been described, and molecules such as soluble tumor necrosis factor (TNF)-related apoptosis-inducing ligands (sTRAIL) are involved. This effect of dengue may affect the efficiency of PBMC cryopreservation. Here, we evaluate the viability (trypan blue dye exclusion and amine-reactive dye staining) and functionality (frequency of gamma interferon [IFN-γ]-producing T cells after polyclonal stimulation) of fresh and cryopreserved PBMCs from children with dengue (in acute and convalescence phases), children with other febrile illnesses, and healthy children as controls. Plasma sTRAIL levels were also evaluated. The frequencies of nonviable PBMCs detected by the two viability assays were positively correlated (r = 0.74; P < 0.0001). Cryopreservation particularly affected the PBMCs of children with dengue, who had a higher frequency of nonviable cells than healthy children and children with other febrile illnesses (P ≤ 0.02), and PBMC viability levels were restored in the convalescent phase. In the acute phase, an increased frequency of CD3+ CD8+ amine-positive cells was found before cryopreservation (P = 0.01). Except for B cells in the acute phase, cryopreservation usually did not affect the relative frequencies of viable PBMC subpopulations. Dengue infection reduced the frequency of IFN-γ-producing CD3+ cells after stimulation compared with healthy controls and convalescent-phase patients (P ≤ 0.003), and plasma sTRAIL correlated with this decreased frequency in dengue (rho = -0.56; P = 0.01). Natural dengue infection in children can affect the viability and functionality of cryopreserved PBMCs.
Collapse
Affiliation(s)
| | - Doris M Salgado
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Colombia
- Departamento de Pediatría, Hospital Universitario de Neiva, Neiva, Colombia
| | - Diana M Castañeda
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Colombia
| | - Carlos F Narváez
- Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Colombia
| |
Collapse
|
16
|
Daniele N, Campus M, Pellegrini C, Shkembi E, Zinno F. Biobanks and Clinical Research: An "Interesting" Connection. ACTA ACUST UNITED AC 2016. [DOI: 10.17352/acp.000005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
17
|
Weinberg A, Park JG, Bosch R, Cho A, Livingston E, Aweeka F, Cramer Y, Watts DH, Luque AE, Cohn SE. Effect of Depot Medoxyprogesterone Acetate on Immune Functions and Inflammatory Markers of HIV-Infected Women. J Acquir Immune Defic Syndr 2016; 71:137-45. [PMID: 26413850 PMCID: PMC4712075 DOI: 10.1097/qai.0000000000000850] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Depot medroxyprogesterone acetate (DMPA) was associated with increased HIV transmission and accelerated disease progression in untreated women. The potential underlying mechanisms include immune modulation. We evaluated the effect of a single DMPA injection on cell-mediated immunity (CMI), T-cell activation, T-cell regulation (Treg), and inflammation in HIV-infected women on combination antiretroviral regimen (cART). METHODS Women with HIV plasma RNA ≤ 400 copies per milliliter on stable cART received DMPA and had immunologic and medroxyprogesterone acetate (MPA) measurements at baseline, 4 weeks [peak MPA concentration (Cmax)], and 12 weeks [highest MPA area under the concentration curve]. RESULTS At baseline, among 24 women with median age of 32 years and 622 CD4(+) cells per microliter, ≥ 68% had HIV, varicella-zoster virus, phytohemagglutinin A and CD3/CD28 CMI measured by lymphocyte proliferation, and/or IFNγ/IL2 dual-color fluorospot. CMI did not significantly change after DMPA administration except for a 1.4-fold increase in IL2/IFNγ varicella-zoster virus fluorospot at week 12. T-cell activation decreased after DMPA administration, reaching statistical significance at week 12 for CD4(+)CD25+%. Treg behaved heterogeneously with an increase in CD8+FOXP3+% at week 4 and a decrease in CD4+IL35+% at week 12. There was a decrease in TGFβ at week 12 and no other changes in plasma biomarkers. Correlation analyses showed that high MPA Cmax and/or area under the concentration curve were significantly associated with increases of IFNγ HIV enzyme-linked ImmunoSpot, CD4+IL35+%, and CD4+TGFβ+% Treg and decreases of plasma IL10 from baseline to weeks 4 and/or 12. CONCLUSIONS A single dose of DMPA did not have immune-suppressive or pro-inflammatory effects in HIV-infected women on cART. Additional studies need to assess the effect of multiple doses.
Collapse
Affiliation(s)
- Adriana Weinberg
- *Department of Pediatrics, University of Colorado Denver Anschutz Medical Center, Aurora, CO; †Department of Biostatistics, Statistical and Data Analysis Center, Harvard School of Public Health, Boston, MA; ‡Department of Obstetrics/Gynecology/Maternal-Fetal Medicine, Duke University Medical Center, Durham, NC; §Department of Clinical Pharmacology, University of California, San Francisco, CA; ‖Office of the Global AIDS Coordinator and Health Diplomacy, U.S. Department of State, Washington, DC; ¶Department of Infectious Diseases, University of Rochester School of Medicine and Dentistry, Rochester, NY; and #Department of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Measuring Cellular Immunity to Influenza: Methods of Detection, Applications and Challenges. Vaccines (Basel) 2015; 3:293-319. [PMID: 26343189 PMCID: PMC4494351 DOI: 10.3390/vaccines3020293] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 03/27/2015] [Accepted: 03/30/2015] [Indexed: 12/11/2022] Open
Abstract
Influenza A virus is a respiratory pathogen which causes both seasonal epidemics and occasional pandemics; infection continues to be a significant cause of mortality worldwide. Current influenza vaccines principally stimulate humoral immune responses that are largely directed towards the variant surface antigens of influenza. Vaccination can result in an effective, albeit strain-specific antibody response and there is a need for vaccines that can provide superior, long-lasting immunity to influenza. Vaccination approaches targeting conserved viral antigens have the potential to provide broadly cross-reactive, heterosubtypic immunity to diverse influenza viruses. However, the field lacks consensus on the correlates of protection for cellular immunity in reducing severe influenza infection, transmission or disease outcome. Furthermore, unlike serological methods such as the standardized haemagglutination inhibition assay, there remains a large degree of variation in both the types of assays and method of reporting cellular outputs. T-cell directed immunity has long been known to play a role in ameliorating the severity and/or duration of influenza infection, but the precise phenotype, magnitude and longevity of the requisite protective response is unclear. In order to progress the development of universal influenza vaccines, it is critical to standardize assays across sites to facilitate direct comparisons between clinical trials.
Collapse
|
19
|
Sanchez AM, Denny TN, O'Gorman M. Introduction to a Special Issue of the Journal of Immunological Methods: Building global resource programs to support HIV/AIDS clinical trial studies. J Immunol Methods 2014; 409:1-5. [PMID: 24910413 DOI: 10.1016/j.jim.2014.05.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 05/30/2014] [Indexed: 11/30/2022]
Abstract
This Special Issue of the Journal of Immunological Methods includes 16 manuscripts describing quality assurance activities related to virologic and immunologic monitoring of six global laboratory resource programs that support international HIV/AIDS clinical trial studies: Collaboration for AIDS Vaccine Discovery (CAVD); Center for HIV/AIDS Vaccine Immunology (CHAVI); External Quality Assurance Program Oversight Laboratory (EQAPOL); HIV Vaccine Trial Network (HVTN); International AIDS Vaccine Initiative (IAVI); and Immunology Quality Assessment (IQA). The reports from these programs address the many components required to develop comprehensive quality control activities and subsequent quality assurance programs for immune monitoring in global clinical trials including: all aspects of processing, storing, and quality assessment of PBMC preparations used ubiquitously in HIV clinical trials, the development and optimization of assays for CD8 HIV responses and HIV neutralization, a comprehensive global HIV virus repository, and reports on the development and execution of novel external proficiency testing programs for immunophenotyping, intracellular cytokine staining, ELISPOT and luminex based cytokine measurements. In addition, there are articles describing the implementation of Good Clinical Laboratory Practices (GCLP) in a large quality assurance laboratory, the development of statistical methods specific for external proficiency testing assessment, a discussion on the ability to set objective thresholds for measuring rare events by flow cytometry, and finally, a manuscript which addresses a framework for the structured reporting of T cell immune function based assays. It is anticipated that this series of manuscripts covering a wide range of quality assurance activities associated with the conduct of global clinical trials will provide a resource for individuals and programs involved in improving the harmonization, standardization, accuracy, and sensitivity of virologic and immunologic testing.
Collapse
Affiliation(s)
- Ana M Sanchez
- Duke Human Vaccine Institute, Duke University Medical Center, Durham, NC, USA.
| | - Thomas N Denny
- Duke Human Vaccine Institute, Duke University Medical Center, Durham, NC, USA
| | - Maurice O'Gorman
- Departments of Pathology and Pediatrics, Keck School of Medicine, University of Southern California, USA; Department of Pathology and Laboratory Medicine, Children's Hospital Los Angeles, Los Angeles, CA, USA
| |
Collapse
|