1
|
Asmiyou A, Bakr AM, Shahin DA, Wahba Y. CD40 and CD72 expression and prognostic values among children with systemic lupus erythematosus: a case-control study. Lupus 2020; 29:1270-1276. [PMID: 32700598 DOI: 10.1177/0961203320941931] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Systemic lupus erythematosus (SLE) is a chronic disease with proven interactions between immune system components, including both humoral- and cell-mediated immunity, as well as co-stimulatory and inhibitory molecules such as CD40 and CD72. Here, we investigated CD40 and CD72 expression on B cells of SLE children and assessed their prognostic values. We conducted a preliminary case-control study in Mansoura University Children's Hospital, Egypt from September 2018 to January 2020 including 27 SLE children and 27 healthy controls. We assessed cases during initial flare and after remission. Flow cytometry analysis was carried out for all participants for CD40 and CD72 expression of B cells. During flare, SLE cases had statistically significant higher CD40 and lower CD72 expression in comparison with controls (p < 0.001). After remission, the number of CD40+ B cells significantly decreased (p < 0.001), while the number of CD72+ B cells significantly increased (p < 0.001) in comparison with flare. We reported non-significant positive correlations between CD40 expression and SLE Disease Activity Index (SLEDAI; p = 0.347 during flare and p = 0.653 after remission) and negative correlations between CD72 expression and SLEDAI (p = 0.34 during flare and p = 0.044 after remission). No significant differences were detected between renal histopathology classes with regard to CDs expression on B cells (p = 0.45 for CD40 and p = 0.63 for CD72). In conclusion, CD40+ B cells and CD72+ B cells could be considered as markers of paediatric SLE flare and remission, respectively.
Collapse
Affiliation(s)
- Abtisam Asmiyou
- Paediatric Department, Faculty of Medicine, Mansoura University, Egypt
| | - Ashraf M Bakr
- Paediatric Department, Faculty of Medicine, Mansoura University, Egypt
| | - Doaa A Shahin
- Clinical Pathology (Haematology) Department, Faculty of Medicine, Mansoura University, Egypt
| | - Yahya Wahba
- Paediatric Department, Faculty of Medicine, Mansoura University, Egypt
| |
Collapse
|
2
|
Vadasz Z, Goldeberg Y, Halasz K, Rosner I, Valesini G, Conti F, Perricone C, Sthoeger Z, Bezalel SR, Tzioufas AG, Levin NA, Shoenfeld Y, Toubi E. Increased soluble CD72 in systemic lupus erythematosus is in association with disease activity and lupus nephritis. Clin Immunol 2016; 164:114-8. [DOI: 10.1016/j.clim.2016.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/11/2016] [Accepted: 02/12/2016] [Indexed: 10/22/2022]
|
3
|
Wu M, Li J, Gao Q, Ye F. The role of Sema4D/CD100 as a therapeutic target for tumor microenvironments and for autoimmune, neuroimmune and bone diseases. Expert Opin Ther Targets 2016; 20:885-901. [PMID: 26732941 DOI: 10.1517/14728222.2016.1139083] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Semaphorin 4D (Sema4D), also known as CD100, has been implicated in physiologic roles in the immune and nervous systems. However, the interaction of Sema4D with its high affinity receptor, Plexin-B1, reveals a novel role for Sema4D produced by the tumor microenvironment in tumor angiogenesis and metastasis. AREAS COVERED The ligation of Sema4D/CD100 with CD72 on immune and inflammatory cells is known to stimulate immune responses and regulation. Because CD100 and CD72 are expressed on lung immune and nonimmune cells, as well as on mast cells, the CD100/CD72 interaction plays another important role in allergic airway inflammation and mast cell functions. A better understanding of Sema4D-mediated cell signaling in physiological and pathological processes may be crucial for crafting new Sema4D-based therapeutics for human disease and tumor microenvironments. Strategies to achieve effective management through treatment with Sema4D include special siRNAs, neutralizing antibodies and knockdown. EXPERT OPINION This review focuses on the links between Sema4D and human diseases such as cancer, bone metabolism, immune responses and organ development. The current knowledge regarding the expression of Sema4D and its receptors and its functional roles is systemically reviewed to explore Sema4D as both a target and a therapeutic in human diseases.
Collapse
Affiliation(s)
- Mingfu Wu
- a Cancer Biology Research Center, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan , China
| | - Jing Li
- a Cancer Biology Research Center, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan , China
| | - Qinglei Gao
- a Cancer Biology Research Center, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan , China
| | - Fei Ye
- b Department of Neurosurgery, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan , China
| |
Collapse
|
4
|
Laxminarayana D. Molecular insights into systemic lupus erythematosus pathogenesis. Clin Med Insights Pathol 2014; 7:7-9. [PMID: 24678246 PMCID: PMC3964202 DOI: 10.4137/cpath.s14814] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Dama Laxminarayana
- Editor in Chief, Clinical Medicine Insights: Pathology, Formerly with Section on Rheumatology and Immunology, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| |
Collapse
|
5
|
Zhou H, Qi AP, Li HY, Ma L, Xu JH, Xue F, Lu SH, Zhao QJ, Zhou ZP, Yang RC. CD72 gene expression in immune thrombocytopenia. Platelets 2011; 23:638-44. [DOI: 10.3109/09537104.2011.633646] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
6
|
Wu HJ, Bondada S. CD72, a coreceptor with both positive and negative effects on B lymphocyte development and function. J Clin Immunol 2008; 29:12-21. [PMID: 19067131 DOI: 10.1007/s10875-008-9264-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Accepted: 11/10/2008] [Indexed: 10/21/2022]
Abstract
INTRODUCTION B lymphocytes remain in a resting state until activated by antigenic stimuli through interaction with the B cell receptor (BCR). Coreceptors on B cells can modulate the thresholds for signaling through the BCR for growth and differentiation. CD72 is a B cell coreceptor that has been shown to interact with CD100, a semaphorin, and to enhance BCR signaling. DISCUSSION CD72 ligation induces a variety of early signaling events such as activation of the Src kinases Blk and Lyn and the non-src kinase Btk leading to activation of the mitogen-activated protein (MAP) kinases, events usually associated with positive signaling. CD72 signals can enable Btk-deficient B cells to overcome their unresponsiveness to BCR signaling. On the other hand, BCR-mediated signals are enhanced in CD72-deficient cells but are reduced in CD100 null cells. The dual effects of CD72 on B cells can be explained by its association with positive and negative signaling molecules. Thus, CD72 interacts with SHP-1, an SH2-domain containing protein tyrosine phosphatase, a negative regulator of signaling, and Grb2, an adaptor protein associated with the Ras/MAPK pathway. Ligation of CD72 also triggered its association with CD19, a positive modulator of B cell receptor signaling. We propose a dual signaling hypothesis to explain the growth and differentiation promoting properties of CD72. Deficiency in either CD72 or CD100 leads to autoimmunity in mouse models. CD72 expression and polymorphisms exhibit some association with autoimmune diseases such as lupus, Sjogren's syndrome, and type 1 diabetes.
Collapse
Affiliation(s)
- Hsin-Jung Wu
- Section on Immunology and Immunogenetics, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02115, USA
| | | |
Collapse
|
7
|
Li DHH, Winslow MM, Cao TM, Chen AH, Davis CR, Mellins ED, Utz PJ, Crabtree GR, Parnes JR. Modulation of peripheral B cell tolerance by CD72 in a murine model. ACTA ACUST UNITED AC 2008; 58:3192-204. [PMID: 18821699 DOI: 10.1002/art.23812] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
OBJECTIVE B cells play a dominant role in the pathogenesis of several autoimmune diseases, including systemic lupus erythematosus. It is not well understood how B cell signaling contributes to autoantibody production. The goal of this study was to elucidate the role of CD72 in modulating B cell receptor (BCR)-mediated tolerogenic signaling and peripheral B cell tolerance. METHODS A mouse model utilizing hen egg lysozyme (HEL) "anergic" B cells was studied. CD72-deficient mice carrying the BCR-specific IgHEL and/or soluble HEL (sHEL) transgenes were generated by breeding IgHEL-transgenic MD4 mice and/or sHEL-transgenic ML5 mice with congenic, CD72-deficient C57BL/6J mice. Normal and anergic B cells were isolated for analyses of B cell signaling. Aged wild-type and CD72-deficient mice were also examined for autoimmune phenomena. RESULTS In the absence of CD72, anergic B cells inappropriately proliferated and survived in response to stimulation with self antigen. Biochemical analyses indicated that in anergic B cells, CD72 dominantly down-regulated BCR signaling to limit the antigen-induced elevation in [Ca2+]i and the activation of NFATc1, NF-kappaB, MAPK, and Akt. Mechanistically, CD72 was associated with, and regulated, the molecular adaptor Cbl-b in anergic B cells, suggesting that Cbl-b may play a role in mediating the negative effects of CD72 on BCR signaling. Moreover, in aged CD72-deficient mice, spontaneous production of antinuclear and anti-double-stranded DNA autoantibodies and features of lupus-like autoimmune disease were observed. CONCLUSION CD72 is required to maintain B cell anergy and functions as a regulator of peripheral B cell tolerance. Thus, altered CD72 expression may play a role during the development of systemic lupus erythematosus.
Collapse
|
8
|
Orlowski RJ, O'Rourke KS, Olorenshaw I, Hawkins GA, Maas S, Laxminarayana D. Altered editing in cyclic nucleotide phosphodiesterase 8A1 gene transcripts of systemic lupus erythematosus T lymphocytes. Immunology 2008; 125:408-19. [PMID: 18462347 DOI: 10.1111/j.1365-2567.2008.02850.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The aetiopathogenesis of the abnormal immune response in systemic lupus erythematosus (SLE) remains incompletely understood. We and other investigators demonstrated altered expression of adenosine deaminase that act on RNA (ADAR) genes in SLE patients. Based on this information, we hypothesize that the altered expression and function of ADAR enzymes is a mechanism for the immunopathogenesis of SLE. ADARs edit gene transcripts through site-specific conversion of adenosine to inosine by hydrolytic deamination at C6 of the adenosine. Thirteen SLE subjects and eight healthy controls were studied. We assessed the role of ADAR enzymes in editing of PDE8A1 gene transcripts of normal and SLE T cells. These studies demonstrated the occurrence of ADAR-catalysed altered and site-selective editing profile of specific sites in the PDE8A1 gene transcripts of normal and SLE T cells. Two hot spots for A to I editing were observed in the PDE8A1 transcripts of normal and SLE T cells. A fundamental finding of this study is A to I hypo-editing followed by up-regulation of PDE8A1 transcripts in SLE T cells. These results are confirmed by analysing PDE8A1 transcripts of normal T cells activated with type I interferon-alpha. It is proposed that, the altered expression of ADAR enzymes tilt the balance of editing machinery and alter editing in SLE transcriptome. Such altered editing may contribute to the modulation of gene regulation and ultimately, immune functions in SLE and play an important role in the initiation and propagation of SLE pathogenesis.
Collapse
Affiliation(s)
- Robert J Orlowski
- Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA
| | | | | | | | | | | |
Collapse
|
9
|
Laxminarayana D, Khan IU, O'Rourke KS, Giri B. Induction of 150-kDa adenosine deaminase that acts on RNA (ADAR)-1 gene expression in normal T lymphocytes by anti-CD3-epsilon and anti-CD28. Immunology 2007; 122:623-33. [PMID: 17897325 PMCID: PMC2266038 DOI: 10.1111/j.1365-2567.2007.02709.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
We and other investigators have demonstrated up-regulation of the expression of the RNA-editing gene 150-kDa adenosine deaminase that acts on RNA (ADAR1) in systemic lupus erythematosus (SLE) T cells and B cells, peripheral blood mononuclear cells (PBMC), natural killer (NK) cells. The presence of a small proportion of activated T cells is the hallmark of SLE. Therefore, it was hypothesized that 150-kDa ADAR1 gene expression is induced by the physiological activation of T cells. To examine this hypothesis, normal T cells were activated by anti-CD3-epsilon plus anti-CD28 for various time periods from 0 to 48 hr. The expression of 110-kDa and 150-kDa ADAR1, and interleukin (IL)-2 and beta-actin gene transcripts was analysed. An approximately fourfold increase in 150-kDa ADAR1 gene expression was observed in activated T cells. ADAR2 gene transcripts are substrates for ADAR1 and ADAR2 enzymes. Therefore, we assessed the role of the 150-kDa ADAR enzyme in editing of ADAR2 gene transcripts. In activated T cells, site-selective editing of the -2 site was observed. Previous studies indicate that this site is predominantly edited by ADAR1. In addition to this, novel editing sites at base positions -56, -48, -45, -28, -19, -15, +46 and +69 were identified in activated T cells. On the basis of these results, it is proposed that 150-kDa ADAR1 gene expression is selectively induced in T cells by anti-CD3-epsilon and anti-CD28 stimulation and that it may play a role in site-selective editing of gene transcripts and in altering the functions of several gene products of T cells during activation and proliferation.
Collapse
Affiliation(s)
- Dama Laxminarayana
- Section on Rheumatology and Immunology, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
| | | | | | | |
Collapse
|
10
|
Laxminarayana D, O'Rourke KS, Maas S, Olorenshaw I. Altered editing in RNA editing adenosine deaminase ADAR2 gene transcripts of systemic lupus erythematosus T lymphocytes. Immunology 2007; 121:359-69. [PMID: 17376196 PMCID: PMC2265949 DOI: 10.1111/j.1365-2567.2007.02582.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Adenosine Deaminases that act on RNA (ADARs) edit gene transcripts through site-specific conversion of adenosine to inosine by hydrolytic deamination at C6 of the adenosine. ADAR2 gene transcripts are substrates for the ADAR1 and ADAR2 enzymes and their expression is regulated by editing at the - 1 and - 2 sites. Our previous experiments demonstrated up-regulation of type I interferon (IFN) inducible 150 kDa ADAR1 in systemic lupus erythematosus (SLE) T cells. In this study we investigate the role of ADAR1 and ADAR2 in editing of ADAR2 gene transcripts of healthy controls and SLE patients. The ADAR2 gene transcripts were cloned into pCR2.1-TOPO vectors. A total of 150 clones from SLE and 150 clones from controls were sequenced. Sequence analysis demonstrated A to I editing at - 1, + 10, + 23 and + 24 in normal T cells. In SLE clones site-selective editing of the - 2 site was observed as a result of type I IFN-inducible 150 kDa ADAR1 expression. These results are confirmed by analysing ADAR2 transcripts of normal T cells activated with type I IFN-alpha. Editing of the + 23 and + 24 sites was decreased in SLE T cells compared to normal controls. In addition to A to G changes, U to C discrepancies were observed in normal and SLE T cells. In SLE cells, positions - 6 and + 30 were frequently edited from U to C compared to normal controls. Taken together, these results demonstrate altered and site-selective editing in ADAR2 transcripts of SLE patients. Based on these results, it is proposed that altered transcript editing contributes to the modulation of gene expression and immune functions in SLE patients.
Collapse
Affiliation(s)
- Dama Laxminarayana
- Section on Rheumatology and Immunology, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
| | | | | | | |
Collapse
|