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Nam JH, Cha B, Park JY, Abekura F, Kim CH, Kim JR. Mitogen-Induced Interferon Gamma Production in Human Whole Blood: The Effect of Heat and Cations. Curr Pharm Biotechnol 2019; 20:562-572. [PMID: 31132974 DOI: 10.2174/1389201020666190528093432] [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: 04/24/2018] [Revised: 08/15/2018] [Accepted: 04/23/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Interferon-gamma release assays (IGRAs) are blood tests used to measure the amount of interferon-γ (IFN-γ) released by T lymphocytes after stimulation by antigens specific for the diagnosis of latent tuberculosis infection. A mitogen serves as a positive control to assess the immune function in IGRAs. METHODS This in vitro study was conducted to evaluate IFN-γ production by human whole blood stimulated with heat-treated and/or cation-supplemented phytohemagglutinin (PHA), concanavalin A (Con A) and pokeweed mitogen (PWM), using QuantiFERON-TB Gold Kit ELISA tests. RESULTS The optimal concentrations of PWM, Con A and PHA for IGRAs were 2 µg/mL, 5 µg/mL and 10 µg/mL, respectively. The results showed that IFN-γ production in response to PWM was the highest and PHA was the lowest amount. The median values of three mitogens were in the following order: PWM≥Con A≥ positive control>>PHA-P>>negative control. PWM and PHA were heat stable, while Con A was heat sensitive. The mitogen response of lymphocytes to untreated or heat-treated PWM and heat-treated Con A was increased in 1 mM Ca2+-supplemented groups, whereas the response to heat-treated PHA was decreased. Exposure to 1 mM Mg2+ had no effect on untreated or heat-treated PWM, and a concentration of 1 mM Zn2+ inhibited the stimulation of un-treated PWM. We found that calcium supplementation improved the PWM-induced production of IFN-γ. CONCLUSION Therefore, PWM is an appropriate mitogen for use as a positive control in IGRAs. It is a potential indicator of cytokine production in the diagnostic as well as research settings, and calcium supplementation improved stimulation.
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Affiliation(s)
- Ji-Hyun Nam
- Department of Research and Development, The Korean Institute of Tuberculosis, 168-5 Osongsaengmyeong4-ro, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do 28158, Korea.,Division of Antimicrobial Resistance, Center for Infectious Disease Research, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, 187 Osongsaengmyeong2-ro, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do 28159, Korea
| | - Bomi Cha
- Department of Research and Development, The Korean Institute of Tuberculosis, 168-5 Osongsaengmyeong4-ro, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do 28158, Korea
| | - Jun-Young Park
- Molecular and Cellular Glycobiology Unit, Department of Biological Sciences, SungKyunKwan University, Seoburo, Jangan-Gu, Kyunggi-Do 16419, Korea
| | - Fukushi Abekura
- Molecular and Cellular Glycobiology Unit, Department of Biological Sciences, SungKyunKwan University, Seoburo, Jangan-Gu, Kyunggi-Do 16419, Korea
| | - Cheorl-Ho Kim
- Molecular and Cellular Glycobiology Unit, Department of Biological Sciences, SungKyunKwan University, Seoburo, Jangan-Gu, Kyunggi-Do 16419, Korea
| | - Jeong-Ran Kim
- Department of Research and Development, The Korean Institute of Tuberculosis, 168-5 Osongsaengmyeong4-ro, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do 28158, Korea
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Clark KC, Fierro FA, Ko EM, Walker NJ, Arzi B, Tepper CG, Dahlenburg H, Cicchetto A, Kol A, Marsh L, Murphy WJ, Fazel N, Borjesson DL. Human and feline adipose-derived mesenchymal stem cells have comparable phenotype, immunomodulatory functions, and transcriptome. Stem Cell Res Ther 2017; 8:69. [PMID: 28320483 PMCID: PMC5360077 DOI: 10.1186/s13287-017-0528-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 02/10/2017] [Accepted: 03/03/2017] [Indexed: 12/18/2022] Open
Abstract
Background Adipose-derived mesenchymal stem cells (ASCs) are a promising cell therapy to treat inflammatory and immune-mediated diseases. Development of appropriate pre-clinical animal models is critical to determine safety and attain early efficacy data for the most promising therapeutic candidates. Naturally occurring diseases in cats already serve as valuable models to inform human clinical trials in oncologic, cardiovascular, and genetic diseases. The objective of this study was to complete a comprehensive side-by-side comparison of human and feline ASCs, with an emphasis on their immunomodulatory capacity and transcriptome. Methods Human and feline ASCs were evaluated for phenotype, immunomodulatory profile, and transcriptome. Additionally, transwells were used to determine the role of cell-cell contact in ASC-mediated inhibition of lymphocyte proliferation in both humans and cats. Results Similar to human ASCs, feline ASCs were highly proliferative at low passages and fit the minimal criteria of multipotent stem cells including a compatible surface protein phenotype, osteogenic capacity, and normal karyotype. Like ASCs from all species, feline ASCs inhibited mitogen-activated lymphocyte proliferation in vitro, with or without direct ASC-lymphocyte contact. Feline ASCs mimic human ASCs in their mediator secretion pattern, including prostaglandin E2, indoleamine 2,3 dioxygenase, transforming growth factor beta, and interleukin-6, all augmented by interferon gamma secretion by lymphocytes. The transcriptome of three unactivated feline ASC lines were highly similar. Functional analysis of the most highly expressed genes highlighted processes including: 1) the regulation of apoptosis; 2) cell adhesion; 3) response to oxidative stress; and 4) regulation of cell differentiation. Finally, feline ASCs had a similar gene expression profile to noninduced human ASCs. Conclusions Findings suggest that feline ASCs modulate lymphocyte proliferation using soluble mediators that mirror the human ASC secretion pattern. Uninduced feline ASCs have similar gene expression profiles to uninduced human ASCs, as revealed by transcriptome analysis. These data will help inform clinical trials using cats with naturally occurring diseases as surrogate models for human clinical trials in the regenerative medicine arena. Electronic supplementary material The online version of this article (doi:10.1186/s13287-017-0528-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kaitlin C Clark
- Veterinary Institute for Regenerative Cures and Department of Pathology, Microbiology and Immunology, University of California, Davis, CA, 95816, USA
| | - Fernando A Fierro
- Institute for Regenerative Cures and Department of Cell Biology and Human Anatomy, University of California, Davis, CA, 95816, USA
| | - Emily Mills Ko
- Veterinary Institute for Regenerative Cures and Department of Pathology, Microbiology and Immunology, University of California, Davis, CA, 95816, USA
| | - Naomi J Walker
- Veterinary Institute for Regenerative Cures and Department of Pathology, Microbiology and Immunology, University of California, Davis, CA, 95816, USA
| | - Boaz Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA, 95816, USA
| | - Clifford G Tepper
- Department of Biochemistry and Molecular Medicine, University of California, Davis, CA, 95816, USA
| | - Heather Dahlenburg
- Institute for Regenerative Cures and Department of Cell Biology and Human Anatomy, University of California, Davis, CA, 95816, USA
| | - Andrew Cicchetto
- Institute for Regenerative Cures and Department of Cell Biology and Human Anatomy, University of California, Davis, CA, 95816, USA
| | - Amir Kol
- Veterinary Institute for Regenerative Cures and Department of Pathology, Microbiology and Immunology, University of California, Davis, CA, 95816, USA
| | - Lyndsey Marsh
- Veterinary Institute for Regenerative Cures and Department of Pathology, Microbiology and Immunology, University of California, Davis, CA, 95816, USA
| | - William J Murphy
- Department of Dermatology, School of Medicine, University of California, Davis, CA, 95816, USA
| | - Nasim Fazel
- Department of Dermatology, School of Medicine, University of California, Davis, CA, 95816, USA
| | - Dori L Borjesson
- Veterinary Institute for Regenerative Cures and Department of Pathology, Microbiology and Immunology, University of California, Davis, CA, 95816, USA.
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