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LOC103693069对BMSCs缺氧性凋亡的作用研究. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2022; 36. [PMID: 35293179 DOI: 10.7507/1002-1892.202103092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To investigate the effect of LOC103693069 on hypoxic apoptosis of bone marrow mesenchymal stem cells (BMSCs). METHODS BMSCs from 1-week-old Sprague Dawley rat bone marrow were isolated, cultured, and passaged by the whole bone marrow adherent culture method. After identification of adipogenic, chondrogenic, and osteogenic differentiation, the 3rd generation cells were treated with hypoxia under 5%O 2, 1%O 2, and anaerobic conditions. After 48 hours, the cell viability, apoptosis, and apoptosis-related proteins [hypoxia inducible factor 1α (HIF-1α), Caspase-3, B cell lymphoma/leukemia 2 (Bcl-2)] expressions were detected, and normal BMSCs were used as controls. Based on the research results, the concentration group with the most obvious apoptosis was selected and used for subsequent experiments. After 48 hours of hypoxia treatment, BMSCs were taken and analyzed by gene chip and real-time fluorescence quantitative PCR (qRT-PCR) to screen the most significantly down-regulated gene and construct their high-expression, low-expression, and negative control lentiviruses; BMSCs were transfected with the different lentiviruses, respectively. After qRT-PCR detection confirmed that the transfection was successful, the BMSCs were treated with hypoxia for 48 hours to observe the cell viability and the expressions of apoptosis-related proteins. RESULTS After cell viability, apoptosis, and apoptosis-related proteins were detected, cell apoptosis was the most significant under anaerobic conditions after 48 hours. The above indicators were significantly different from other groups ( P<0.05), and this group was used for treatment conditions for subsequent experiments. Gene chip analysis showed that after 48 hours of hypoxia treatment, AC125847.1, LOC102547753, AABR07017208.2, and LOC103693069 were significantly down-regulated in BMSCs, and the expressions of LOC103693069 was the most significant down-regulation detected by qRT-PCR ( P<0.05). It was selected to construct lentivirus and transfect BMSCs. Afterwards, qRT-PCR detection showed the successful transfection into the cells. After hypoxia treatment, the apoptosis rate and the expressions of apoptosis-related proteins of BMSCs overexpressed by the gene were significantly reduced ( P<0.05). CONCLUSION LOC103693069 can relieve the hypoxic apoptosis of BMSCs.
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González-Cano P, Arsic N, Popowych YI, Griebel PJ. Two functionally distinct myeloid dendritic cell subpopulations are present in bovine blood. Dev Comp Immunol 2014; 44:378-388. [PMID: 24502939 DOI: 10.1016/j.dci.2014.01.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 01/15/2014] [Accepted: 01/16/2014] [Indexed: 06/03/2023]
Abstract
Immature myeloid (m)DCs circulating in the blood of cattle have been defined as lineage negative (Lin(-))MHCII(+)CD11c(+)CD205(+) cells. Lin(-)MHCII(+)CD11c(+)CD205(+) mDCs (0.2% blood mononuclear cells) isolated from bovine blood were heterogeneous in cell size and CD205 expression. Using highspeed cell sorting, Lin(-)MHCII(+)CD11c(+)CD205(+) DCs were sorted into CD205(Hi) and CD205(Lo) subpopulations which were phenotypically distinct and differed significantly (P<0.01) in TLR gene expression. CD205(Hi) and CD205(Lo) mDCs were more efficient in macropinocytosis than monocytes and expressed no or little detectable non-specific esterase activity. CD205(Lo) mDCs efficiently activated purified allogeneic T cells and the addition of TLR agonists did not significantly alter this antigen presentation capacity. T cell activation by CD205(Lo) mDCs was associated with differential up-regulation of CD40, CD80, CD86 and TGFβ1 gene expression when compared to CD205(Hi) mDCs. In conclusion, two phenotypically and functionally distinct CD11c(+)CD205(+) mDCs were isolated from blood that had an equal capacity to acquire antigen but markedly different capacities to activate T cells.
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Affiliation(s)
- Patricia González-Cano
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Natasa Arsic
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Yurij I Popowych
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Philip J Griebel
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada; School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada.
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Yang WX, Zhu X, Yu FL, Zhang T, Lin N, Liu TT, Zhao FF, Liu Y, Xia H, Guan JC. Decreased Vβ8.2 T-cells in neonatal rats exposed prenatally to Staphylococcal enterotoxin B are further deleted by restimulation in an in vitro cultured thymus. Mol Med Rep 2014; 10:989-94. [PMID: 24865816 DOI: 10.3892/mmr.2014.2270] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 04/25/2014] [Indexed: 11/06/2022] Open
Abstract
Staphylococcal enterotoxin B (SEB) administration during adulthood can cause the anergy or deletion of variable portion of the ? chain (V?)?expressing T cells. However, the effect of maternal SEB administration during pregnancy on the thymocytes of neonatal rats remains to be elucidated. In the present study, pregnant rats at gestational day 16 were intravenously injected with 15 µg SEB. The present study revealed that prenatal exposure of SEB significantly increased the proportion of cluster of differentiation (CD)4?single positive (SP) T cells and decreased the proportions of CD8?SP, CD4+ V?8.2+ and CD8+ V?8.2+ T cells in the thymus of neonatal rats between day 0 and 5 after delivery. In an in vitro cultured thymus, SEB restimulation significantly increased the proportion of double positive cells and decreased the proportions of CD4?SP, CD8?SP, CD4+ V?8.2+ and CD8+ V?8.2+ T cells. Furthermore, the decreased V?8.2+ T?cells in neonatal rats exposed prenatally to SEB were further deleted by SEB restimulation in an in vitro cultured thymus. These data suggested the special response pattern of the remaining SEB?specific T cells to SEB restimulation in neonatal rats exposed prenatally to SEB.
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Affiliation(s)
- Wen-Xuan Yang
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Xiang Zhu
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Feng-Ling Yu
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Tao Zhang
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Na Lin
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Ting-Ting Liu
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Fang-Fang Zhao
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Yong Liu
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Hui Xia
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Jun-Chang Guan
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
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Abstract
An efficient immune response requires coordination between innate and adaptive immunity, which act through cells different in origin and function. Here we report the identification of thymus-derived αβ TCR+ cells that express CD11c and MHC class II, and require FLT3L for development (TDC). TDC express genes heretofore found uniquely in T cells or DC, as well as a distinctive signature of cytotoxicity-related genes. Unlike other innate T cell subsets, TDC have a polyclonal TCR repertoire andrespond to cognate antigens. However, they differ from conventional T cells in that they do not require help from antigen-presenting cells, respond to TLR-mediated stimulation by producing IL-12 and process and present antigen. The physiologic relevance of TDC, found in mice and humans, is still under investigation, but the fact that they combine key features of T and DC cells suggests that they provide a bridge between the innate and adaptive immune systems.
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Laperchia C, Allegra Mascaro AL, Sacconi L, Andrioli A, Mattè A, De Franceschi L, Grassi-Zucconi G, Bentivoglio M, Buffelli M, Pavone FS. Two-photon microscopy imaging of thy1GFP-M transgenic mice: a novel animal model to investigate brain dendritic cell subsets in vivo. PLoS One 2013; 8:e56144. [PMID: 23409142 PMCID: PMC3567047 DOI: 10.1371/journal.pone.0056144] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 01/07/2013] [Indexed: 12/23/2022] Open
Abstract
Transgenic mice expressing fluorescent proteins in specific cell populations are widely used for in vivo brain studies with two-photon fluorescence (TPF) microscopy. Mice of the thy1GFP-M line have been engineered for selective expression of green fluorescent protein (GFP) in neuronal populations. Here, we report that TPF microscopy reveals, at the brain surface of these mice, also motile non-neuronal GFP+ cells. We have analyzed the behavior of these cells in vivo and characterized in brain sections their immunophenotype. With TPF imaging, motile GFP+ cells were found in the meninges, subarachnoid space and upper cortical layers. The striking feature of these cells was their ability to move across the brain parenchyma, exhibiting evident shape changes during their scanning-like motion. In brain sections, GFP+ cells were immunonegative to antigens recognizing motile cells such as migratory neuroblasts, neuronal and glial precursors, mast cells, and fibroblasts. GFP+ non-neuronal cells exhibited instead the characteristic features and immunophenotype (CD11c and major histocompatibility complex molecule class II immunopositivity) of dendritic cells (DCs), and were immunonegative to the microglial marker Iba-1. GFP+ cells were also identified in lymph nodes and blood of thy1GFP-M mice, supporting their identity as DCs. Thus, TPF microscopy has here allowed the visualization for the first time of the motile behavior of brain DCs in situ. The results indicate that the thy1GFP-M mouse line provides a novel animal model for the study of subsets of these professional antigen-presenting cells in the brain. Information on brain DCs is still very limited and imaging in thy1GFP-M mice has a great potential for analyses of DC-neuron interaction in normal and pathological conditions.
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Affiliation(s)
- Claudia Laperchia
- Department of Neurological Sciences, University of Verona, Verona, Italy
- National Institute of Neuroscience, Verona, Italy
| | - Anna L. Allegra Mascaro
- European Laboratory of Non-Linear Spectroscopy, University of Florence, Sesto Fiorentino, Italy
| | - Leonardo Sacconi
- European Laboratory of Non-Linear Spectroscopy, University of Florence, Sesto Fiorentino, Italy
- National Institute of Optics, National Research Council, Florence, Italy
| | - Anna Andrioli
- Department of Neurological Sciences, University of Verona, Verona, Italy
- National Institute of Neuroscience, Verona, Italy
| | | | | | - Gigliola Grassi-Zucconi
- Department of Neurological Sciences, University of Verona, Verona, Italy
- National Institute of Neuroscience, Verona, Italy
| | - Marina Bentivoglio
- Department of Neurological Sciences, University of Verona, Verona, Italy
- National Institute of Neuroscience, Verona, Italy
| | - Mario Buffelli
- Department of Neurological Sciences, University of Verona, Verona, Italy
- National Institute of Neuroscience, Verona, Italy
- Center for Biomedical Computing, University of Verona, Verona, Italy
- * E-mail:
| | - Francesco S. Pavone
- European Laboratory of Non-Linear Spectroscopy, University of Florence, Sesto Fiorentino, Italy
- National Institute of Optics, National Research Council, Florence, Italy
- Department of Physics, University of Florence, Sesto Fiorentino, Italy
- International Center of Computational Neurophotonics, Sesto Fiorentino, Italy
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Abstract
The inflammatory T-cell response is important for protecting the host against infections and tumors. However, dysregulated generation of effector T cells produces high levels of inflammatory cytokines and cytotoxic molecules and may cause inflammatory disorders, such as chronic infections, autoimmune diseases and graft-versus-host disease after allogeneic bone marrow transplantation. Thus, tight regulation of effector T cells is essential. Accumulating evidence indicates that Notch plays critical roles in regulating the differentiation of antigen activated T cells into distinct lineages of effector T cells. Furthermore, significant progress has been made in the development of new methods in order to modulate Notch for disease treatment. In this article, we will discuss recent findings that help to gain insight into the impact of Notch in the regulation of effector T cells and highlight the beneficial effects of modulating Notch in inflammatory diseases.
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Affiliation(s)
- Kazuhiro Mochizuki
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109-5942, USA
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