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Bai K, Lee CL, Liu X, Li J, Cao D, Zhang L, Hu D, Li H, Hou Y, Xu Y, Kan ASY, Cheung KW, Ng EHY, Yeung WSB, Chiu PCN. Human placental exosomes induce maternal systemic immune tolerance by reprogramming circulating monocytes. J Nanobiotechnology 2022; 20:86. [PMID: 35180876 PMCID: PMC8857816 DOI: 10.1186/s12951-022-01283-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/22/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The maternal immune system needs to tolerate the semi-allogeneic fetus in pregnancy. The adaptation occurs locally at the maternal-fetal interface as well as systemically through the maternal circulation. Failure to tolerate the paternal antigens may result in pregnancy complications, such as pregnancy loss and pre-eclampsia. However, the mechanism that regulates maternal immune tolerance, especially at the systemic level, is still an enigma. Here we report that the first-trimester placenta-derived exosomes (pEXOs) contribute to maternal immune tolerance by reprogramming the circulating monocytes. RESULTS pEXOs predominantly target monocytes and pEXO-educated monocytes exhibit an immunosuppressive phenotype as demonstrated by reduced expression of marker genes for monocyte activation, T-cell activation and antigen-process/presentation at the transcriptomic level. They also have a greater propensity towards M2 polarization when compared to the monocytes without pEXO treatment. The inclusion of pEXOs in a monocyte-T-cell coculture model significantly reduces proliferation of the T helper cells and cytotoxic T cells and elevates the expansion of regulatory T cells. By integrating the microRNAome of pEXO and the transcriptomes of pEXO-educated monocytes as well as various immune cell functional assays, we demonstrate that the pEXO-derived microRNA miR-29a-3p promotes the expression of programmed cell death ligand-1, a well-known surface receptor that suppresses the adaptive immune system, by down-regulation of phosphatase and tensin homolog in monocytes. CONCLUSIONS This is the first report to show how human pEXO directly regulates monocyte functions and its molecular mechanism during early pregnancy. The results uncover the importance of pEXO in regulating the maternal systemic immune response during early pregnancy by reprogramming circulating monocytes. The study provides the basis for understanding the regulation of maternal immune tolerance to the fetal allograft.
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Affiliation(s)
- Kunfeng Bai
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China.,The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, Shenzhen, China
| | - Cheuk-Lun Lee
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China. .,The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, Shenzhen, China.
| | - Xiaofeng Liu
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, Shenzhen, China.,Department of Obstetrics and Gynaecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Jianlin Li
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
| | - Dandan Cao
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, Shenzhen, China
| | - Li Zhang
- Department of Obstetrics and Gynaecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Duanlin Hu
- Department of Obstetrics and Gynaecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Hong Li
- Department of Obstetrics and Gynaecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Yanqing Hou
- Department of Obstetrics and Gynaecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Yue Xu
- Department of Obstetrics and Gynaecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Anita S Y Kan
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
| | - Ka-Wang Cheung
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
| | - Ernest H Y Ng
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China.,The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, Shenzhen, China
| | - William S B Yeung
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, Shenzhen, China
| | - Philip C N Chiu
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China. .,The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, Shenzhen, China.
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Chu TH, Vo MC, Park HS, Lakshmi TJ, Jung SH, Kim HJ, Lee JJ. Potent anti-myeloma efficacy of dendritic cell therapy in combination with pomalidomide and programmed death-ligand 1 blockade in a preclinical model of multiple myeloma. Cancer Immunol Immunother 2020; 70:31-45. [PMID: 32623477 DOI: 10.1007/s00262-020-02654-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 06/25/2020] [Indexed: 01/05/2023]
Abstract
Dendritic cell (DC)-based vaccines are recognized as a promising immunotherapeutic strategy against cancer; however, the efficacy of immunotherapy with DCs is controlled via immune checkpoints, such as programmed death-ligand 1 (PD-L1). PD-L1 expressed on DC and tumor cells binds to programmed death-1 (PD-1) receptors on the activated T cells, which leads to the inhibition of cytotoxic T cells. Blocking of PD-L1 on DC may lead to improve the efficacy of DC therapy for cancer. Here we demonstrated that DC vaccination in combination with pomalidomide and programmed death-ligand 1 (PD-L1) blockade inhibited tumor growth of a multiple myeloma (MM) mouse model. DCs + pomalidomide with dexamethasone + PD-L1 blockade significantly inhibited immune immunosuppressive factors and promoted proportions of immune effector cells in the spleen and tumor microenvironment. Additionally, functional activities of cytotoxic T lymphocytes and NK cells in spleen were enhanced by DCs + pomalidomide with dexamethasone + PD-L1 blockade. Taken together, this study identifies a potential new therapeutic approach for the treatment of MM. These results also provide a foundation for the future development of immunotherapeutic modalities to inhibit tumor growth and restore immune function in MM.
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Affiliation(s)
- Tan-Huy Chu
- Research Center for Cancer Immunotherapy, Chonnam National University Hwasun Hospital, Hwasun, Jeollanamdo, Republic of Korea
| | - Manh-Cuong Vo
- Research Center for Cancer Immunotherapy, Chonnam National University Hwasun Hospital, Hwasun, Jeollanamdo, Republic of Korea.,Department of Hematology-Oncology, Chonnam National University Hwasun Hospital, 322 Seoyangro, Hwasun, Jeollanamdo, 519-763, Republic of Korea
| | - Hye-Seong Park
- Research Center for Cancer Immunotherapy, Chonnam National University Hwasun Hospital, Hwasun, Jeollanamdo, Republic of Korea
| | - Thangaraj Jaya Lakshmi
- Research Center for Cancer Immunotherapy, Chonnam National University Hwasun Hospital, Hwasun, Jeollanamdo, Republic of Korea
| | - Sung-Hoon Jung
- Research Center for Cancer Immunotherapy, Chonnam National University Hwasun Hospital, Hwasun, Jeollanamdo, Republic of Korea. .,Department of Hematology-Oncology, Chonnam National University Hwasun Hospital, 322 Seoyangro, Hwasun, Jeollanamdo, 519-763, Republic of Korea.
| | - Hyeoung-Joon Kim
- Department of Hematology-Oncology, Chonnam National University Hwasun Hospital, 322 Seoyangro, Hwasun, Jeollanamdo, 519-763, Republic of Korea
| | - Je-Jung Lee
- Research Center for Cancer Immunotherapy, Chonnam National University Hwasun Hospital, Hwasun, Jeollanamdo, Republic of Korea. .,Department of Hematology-Oncology, Chonnam National University Hwasun Hospital, 322 Seoyangro, Hwasun, Jeollanamdo, 519-763, Republic of Korea. .,Vaxcell-Bio Therapeutics, Hwasun, Jeollanamdo, Republic of Korea.
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Pospichal H, Brun R, Kaminsky R, Jenni L. Induction of resistance to melarsenoxide cysteamine (Mel Cy) in Trypanosoma brucei brucei. Acta Trop 1994; 58:187-97. [PMID: 7709858 DOI: 10.1016/0001-706x(94)90013-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A population of Trypanosoma brucei brucei with reduced sensitivity to melarsenoxide cysteamine (Mel Cy) was produced in immunosuppresed mice using subcurative drug treatment. Melarsenoxide cysteamine resistance was stable after cyclical transmission through Glossina morsitans centralis. In vitro, the blood-stream forms showed 15-fold higher values for the minimal inhibitory concentration as compared with the parental clone. Cross-resistance could be determined with another arsenical drug, melarsoprol (14-fold) and to two different diamidines (diminazene aceturate: 47-fold; pentamidine methanesulphonate: 34-fold), but not to suramin. When cells were transformed to procyclic forms and tested in vitro, the sensitivity of the resistant population to melarsenoxide cysteamine was only 6-fold lower than that of the parent, but comparatively high cross-resistance could be shown to other drugs (melarsoprol; 85-fold; pentamidine methanesulphonate: 17-fold; quinapyramine sulphate: 40-fold). Selection of the resistant trypanosomes from non-resistant ones was possible under pentamidine methanesulphonate pressure in cell culture.
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Chitambo H, Arakawa A. Therapeutic effect of Berenil and Samorin in mice infected with four trypanosome populations isolated from Zambian cattle. Vet Parasitol 1991; 39:43-52. [PMID: 1897118 DOI: 10.1016/0304-4017(91)90060-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Four populations of Trypanosoma congolense and Trypanosoma brucei brucei were isolated from cattle under different management practices and environments in Zambia. All four isolates had varied responses to both diminazene aceturate (Berenil) and isometamidium chloride (Samorin) as curative drugs in infected mice. Trypanosomes from a traditionally managed herd in a high-tsetse-challenge area had the strains most resistant to Berenil, with maximum curative dose of 45 mg kg-1 body weight. Another isolate from a high-tsetse-challenge area was evidently resistant both to Berenil at 40 mg kg-1 and to Samorin at 4 mg kg-1. The strains most susceptible to both Berenil and Samorin were from a commercially managed herd of cattle under medium tsetse challenge. They responded to recommended cattle standard doses of 3.5 mg kg-1 or 7 mg kg-1 Berenil and to as little as 0.25 mg kg-1 Samorin. It is evident that trypanosome strains resistant to Berenil and/or partially resistant to Samorin exist, and that both T. congolense and T. b. brucei are implicated.
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Affiliation(s)
- H Chitambo
- University of Zambia, Faculty of Veterinary Medicine, Department of Disease Control, Lusaka
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Peregrine AS, Knowles G, Ibitayo AI, Scott JR, Moloo SK, Murphy NB. Variation in resistance to isometamidium chloride and diminazene aceturate by clones derived from a stock of Trypanosoma congolense. Parasitology 1991; 102 Pt 1:93-100. [PMID: 2038504 DOI: 10.1017/s0031182000060388] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Nine clones were derived from a drug-resistant Trypanosoma congolense stock (IL 2856) and characterized in mice for their sensitivity to isometamidium chloride and diminazene aceturate. All clones were derived from the stock without drug selection and expressed high levels of resistance to isometamidium chloride (50% curative dose [CD50] values ranging from 1.5 to 5.1 mg/kg) and intermediate to high levels of resistance to diminazene aceturate (CD50 values ranging from 5.1 to 21.0 mg/kg). By contrast, the isometamidium chloride and diminazene aceturate CD50 values for a drug-sensitive clone, T. congolense IL 1180, were 0.018 mg/kg and 2.3 mg/kg, respectively. For both drugs, there appeared to be significantly different levels in expression of drug resistance amongst the 9 clones derived from IL 2856. Isoenzyme analysis of 7 enzymes showed that all 9 clones expressed the same electrophoretic variants. Thus, all 9 clones were identical for these phenotypic markers. The clone which expressed the highest level of resistance to isometamidium in mice (IL 3270) was transmitted to Boran cattle via the bite of infected Glossina morsitans centralis. IL 3270 produced an infection rate in tsetse of 5.0%. The resulting infections in cattle were shown to be resistant to intramuscular treatment with 2.0 mg/kg isometamidium chloride and 14.0 mg/kg diminazene aceturate. This contrasts with doses of 0.25 mg/kg isometamidium chloride or 3.5 mg/kg diminazene aceturate which are deemed sufficient to cure fully sensitive infections. Finally, 9 clones (subclones) were derived from IL 3270 and characterized in mice for their sensitivity to isometamidium chloride.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A S Peregrine
- International Laboratory for Research on Animal Diseases (ILRAD), Nairobi, Kenya
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