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Levitsky J, Miller J, Huang X, Gallon L, Leventhal JR, Mathew JM. Immunoregulatory Effects of Everolimus on In Vitro Alloimmune Responses. PLoS One 2016; 11:e0156535. [PMID: 27275747 PMCID: PMC4898829 DOI: 10.1371/journal.pone.0156535] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 05/16/2016] [Indexed: 01/14/2023] Open
Abstract
Everolimus (EVL) is a novel mTOR-inhibitor similar to sirolimus (SRL) that is used in organ transplant recipients, often in combination with tacrolimus (TAC) or mycophenolate (MPA). The current study aims to determine its effects on regulatory T cells. Increasing concentrations of EVL, MPA and TAC alone or in combination were added to MLRs of healthy volunteers. Lymphoproliferation by 3H-TdR incorporation and the percentage of newly generated CD4+CD127-CD25+FOXP3+ (total Treg) and CD4+CD127-CD25HighFOXP3+ (natural Treg) in CFSE labeled responder cells were assessed by flow cytometry. In comparison to medium controls, EVL and other agents dose-dependently inhibited 3H-TdR incorporation in HLA-2DR-matched and HLA-mismatched MLRs (n = 3-10). However, EVL significantly amplified newly generated total and natural Tregs in CFSE labeled responder cells (p<0.05) at all concentrations, while MPA and SRL did this only at sub-therapeutic concentrations and inhibited at therapeutic levels. In contrast, TAC inhibited newly generated Tregs at all concentrations. When tested in combination with TAC, EVL failed to reverse TAC inhibition of Treg generation. Combinations of EVL and low concentrations of MPA inhibited proliferation and amplified Treg generation in an additive manner when compared to medium controls or each drug tested alone (p<0.05). The relative tolerogenic effect from high to low was EVL > SRL> MPA > TAC. If the results from these in vitro studies are extrapolated to clinical transplantation, it would suggest EVL plus low concentrations of MPA may be the most tolerogenic combination.
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Affiliation(s)
- Josh Levitsky
- Division of Gastroenterology & Hepatology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
- Comprehensive Transplant Center, Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Joshua Miller
- Comprehensive Transplant Center, Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Xuemei Huang
- Comprehensive Transplant Center, Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Lorenzo Gallon
- Comprehensive Transplant Center, Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
- Division of Nephrology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Joseph R. Leventhal
- Comprehensive Transplant Center, Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - James M. Mathew
- Comprehensive Transplant Center, Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
- Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
- * E-mail:
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Li T, Chen H, Yang Z, Wang W, Wang YT, Zhang LM, Zhao JH, Zhou X, Li YM. A novel Pseudolaric acid B derivative, Hexahydropseudolaric acid B, exterts an immunomodulatory effect in vitro/in vivo evaluation. Eur J Pharmacol 2014; 745:10-8. [PMID: 25446920 DOI: 10.1016/j.ejphar.2014.10.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 10/01/2014] [Accepted: 10/06/2014] [Indexed: 02/02/2023]
Abstract
Identification of immunosuppressants from natural sources has a proven track record in immune mediated disorders. Pseudolaric acid B is a diterpenoid isolated from the roots of Pseudolarix amabilis, possessing potent immunomodulatory effect. However, the cytotoxicity limits its future clinical application. The purpose of this study was to investigate the immunosuppressive activity of Hexahydropseudolaric acid B, a Pseudolaric acid B derivative, on T cell-mediated immune response both in vitro and in vivo, and investigated its immunomodulatory effect to develop a more ascendant immunosuppressive agent. The results showed that Hexahydropseudolaric acid B could exert more preferable immunosuppressive activity and lower cytotoxicity than Pseudolaric acid B. Hexahydropseudolaric acid B significantly inhibited T cell proliferation activated by mitogen and alloantigen without obvious cytotoxicity in vitro. Furthermore, Hexahydropseudolaric acid B could ameliorate ear swelling in a mouse model of 2,4-dinitrofluorobenzene-induced delayed-type hypersensitivity in vivo. Mechanistic study revealed that Hexahydropseudolaric acid B could enhance regulatory T cells via promoting Foxp3 expression and TGF-β level, accompanied by attenuating Akt activation, blocking p38MAPK/MK2-HSP27 signal cascades, and up-regulating PPAR-γ expression. Taken together, these results suggest that Hexahydropseudolaric acid B exerts more preferable immunosuppressive activity than its precursor Pseudolaric acid B by affecting multiple targets, which support the need for continued efforts to characterize the efficacy of HPAB as a promising and safe candidate to treat immune-related diseases.
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Affiliation(s)
- Tan Li
- Department of Pathogen Biology and Immunology, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300309, China; Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Institute of Cardiovascular Disease and Heart Center, The Affiliated Hospital of Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China.
| | - Hong Chen
- Department of Pharmacognosy and Pharmaceutics, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300309, China; Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300309, China.
| | - Zhen Yang
- Pingjin Hospital, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China
| | - Wei Wang
- Pingjin Hospital, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China
| | - Yi-teng Wang
- Department of Pharmacognosy and Pharmaceutics, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300309, China
| | - Li-ming Zhang
- Department of Pharmacognosy and Pharmaceutics, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300309, China
| | - Ji-hong Zhao
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Institute of Cardiovascular Disease and Heart Center, The Affiliated Hospital of Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China; Pingjin Hospital, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China
| | - Xin Zhou
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Institute of Cardiovascular Disease and Heart Center, The Affiliated Hospital of Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China; Pingjin Hospital, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China
| | - Yu-ming Li
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Institute of Cardiovascular Disease and Heart Center, The Affiliated Hospital of Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China; Pingjin Hospital, Logistics University of the Chinese People׳s Armed Police Force, Tianjin 300162, China
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Han Y, Wu J, Bi L, Xiong S, Gao S, Yin L, Jiang L, Chen C, Yu K, Zhang S. Malignant B cells induce the conversion of CD4+CD25- T cells to regulatory T cells in B-cell non-Hodgkin lymphoma. PLoS One 2011; 6:e28649. [PMID: 22174855 PMCID: PMC3235139 DOI: 10.1371/journal.pone.0028649] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Accepted: 11/11/2011] [Indexed: 12/28/2022] Open
Abstract
Recent evidence has demonstrated that regulatory T cells (Treg) were enriched in the tumor sites of patients with B-cell non-Hodgkin lymphoma (NHL). However, the causes of enrichment and suppressive mechanisms need to be further elucidated. Here we demonstrated that CD4(+)CD25(+)FoxP3(+)CD127(lo) Treg were markedly increased and their phenotypes were different in peripheral blood (PB) as well as bone marrow (BM) from newly diagnosed patients with B-cell NHL compared with those from healthy volunteers (HVs). Involved lymphatic tissues also showed higher frequencies of Treg than benign lymph nodes. Moreover, the frequencies of Treg were significantly higher in involved lymphatic tissues than those from PB as well as BM in the same patients. Suppression mediated by CD4(+)CD25(+) Treg co-cultured with allogeneic CFSE-labeled CD4(+)CD25(-) responder cells was also higher in involved lymphatic tissues from B-cell NHL than that mediated by Treg from HVs. In addition, we found that malignant B cells significantly induced FoxP3 expression and regulatory function in CD4(+)CD25(-) T cells in vitro. In contrast, normal B cells could not induce the conversion of CD4(+)CD25(-) T cells to Treg. We also showed that the PD-1/B7-H1 pathway might play an important role in Treg induction. Taken together, our results suggest that malignant B cells induce the conversion of CD4(+)CD25(-) T cells to Treg, which may play a role in the pathogenesis of B-cell NHL and represent a promising therapeutic target.
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Affiliation(s)
- Yixiang Han
- Laboratory of internal medicine, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Jianbo Wu
- Laboratory of internal medicine, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Laixi Bi
- Department of Hematology, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Shudao Xiong
- Department of Hematology/Oncology, the Second Hospital of Anhui Medical University, Hefei, China
| | - Shenmeng Gao
- Laboratory of internal medicine, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Lihui Yin
- Laboratory of internal medicine, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Lei Jiang
- Laboratory of internal medicine, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Chiqi Chen
- Laboratory of internal medicine, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Kang Yu
- Department of Hematology, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
| | - Shenghui Zhang
- Laboratory of internal medicine, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, China
- * E-mail:
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