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Mohamed Ragab S, Moustafa Abo ElFotoh W, Ahmed El-Hawy M, Abdelfatah Badr E, Khairat Ali Mostafa S, El-Sayad Abd El-Hamid M. Interleukin (IL)-1B and IL-1 receptor antagonist gene polymorphisms in children with primary immune thrombocytopenia. Clin Exp Pediatr 2024; 67:465-473. [PMID: 39054641 PMCID: PMC11374454 DOI: 10.3345/cep.2024.00577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 06/12/2024] [Indexed: 07/27/2024] Open
Abstract
Background The pathophysiology and susceptibility of children to primary immune thrombocytopenia (ITP) are linked to polymorphisms of the interleukin (IL)-1B and IL-1 receptor (IL-1R) antagonist genes. PURPOSE To investigate the association between the susceptibility and severity of primary ITP in children and the IL-1B and IL-1R antagonist gene polymorphisms. METHODS This comparative case-control study was conducted at the Menoufia University Hospital Hematology and Oncology Unit, Pediatric Department, between August 2022 and September 2023. The children were divided into patients (28 boys, 22 girls) who received hospital and outpatient clinic care and controls (50 healthy age- and sex-matched children). RESULTS The mutant homozygous GG genotype and mutant G allele of rs16944 of the IL1B gene were considerably greater in patients than in controls (P<0.001). Furthermore, the mutant homozygous II/II genotype and heterozygous I/II genotype of the IL-1R antagonist gene were considerably greater in the case versus control group. The mutant II allele was significantly more prevalent in patients versus controls (P<0.001). CONCLUSION IL-1B and IL-1R antagonists may have a major impact on the development of immune thrombocytopenia. Furthermore, we found a relationship between IL-1B and IL-1R antagonist gene polymorphisms and the etiology of and children's susceptibility to primary immune thrombocytopenia.
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Affiliation(s)
- Seham Mohamed Ragab
- Pediatrics Department, Faculty of medicine, Menoufia University, Shebin Elkom, Menoufia, Egypt
| | | | - Mahmoud Ahmed El-Hawy
- Pediatrics Department, Faculty of medicine, Menoufia University, Shebin Elkom, Menoufia, Egypt
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Zahran AM, El-Badawy OH, Mahran H, Gad E, Saad K, Morsy SG, Makboul A, Zahran ZAM, Elhoufey A, Dailah HG, Elsayh KI. Detection and characterization of autoreactive memory stem T-cells in children with acute immune thrombocytopenia. Clin Exp Med 2024; 24:158. [PMID: 39004660 PMCID: PMC11247050 DOI: 10.1007/s10238-024-01386-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 05/28/2024] [Indexed: 07/16/2024]
Abstract
Primary immune thrombocytopenia (ITP) is an acquired autoimmune disorder characterized by an isolated decrease in platelets below 100 × 109/l after the exclusion of other conditions associated with thrombocytopenia. We investigated the role of different memory T-cell subsets, including T stem cell memory (TSCM), in children diagnosed with primary ITP and its association with therapeutic duration. This case-control study included 39 pediatric patients with acute ITP admitted to the Children's Hospital at Assiut University. Using a FACSCanto flow cytometer, CD8 + and CD4 + T-lymphocytes were gated. Five different subsets were characterized in each of these cells according to CD45RO and CD45RA expression. Afterward, gating was performed based on CCR7, CD95, and CD27. Examination of the CD8 + T cells subpopulation showed that Central memory T (TCM) and CD8+ Naïve T (TN) cells were significantly lower in ITP patients than in healthy children (p < 0.0001) and (p = 0.01), respectively. In addition, CD8 + TEMRA was significantly higher in ITP children than in controls (p = 0.001). CD4 + TCM cells were significantly lower in the ITP patient group (p = 0.04). However, CD4 + TEM was significantly higher in patients than controls (p = 0.04). Our research found that ITP patients had an imbalance in the ratio of CD4+ to CD8+ T cells in the peripheral blood and that TCM cells may be involved in the pathogenetic mechanism of ITP. TCMs could help in prediction of patients with higher risk of developing ITP.
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Affiliation(s)
- Asmaa M Zahran
- Department of Clinical Pathology, South Egypt Cancer Institute, Assiut University, Assiut, Egypt
| | - Omnia H El-Badawy
- Department of Medical Microbiology & Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt.
| | - Hayam Mahran
- Department of Pediatrics, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Eman Gad
- Department of Pediatrics, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Khaled Saad
- Department of Pediatrics, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Salma G Morsy
- Department of Cancer Biology, South Egypt Cancer Institute, Assiut University, Assiut, Egypt
| | - Ahmed Makboul
- Department of Clinical Pathology, South Egypt Cancer Institute, Assiut University, Assiut, Egypt
| | | | - Amira Elhoufey
- Department of Community Health Nursing, Alddrab University College, Jazan University, 45142, Jazan, Saudi Arabia
| | - Hamad Ghaleb Dailah
- Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan, Saudi Arabia
| | - Khalid I Elsayh
- Department of Pediatrics, Faculty of Medicine, Assiut University, Assiut, Egypt
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3
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Sossou D, Ezinmegnon S, Agbota G, Gbedande K, Accrombessi M, Massougbodji A, d’Almeida M, Alao JM, Dossou-Dagba I, Pachot A, Vachot L, Brengel-Pesce K, Cottrell G, Yessoufou A, Briand V, Tissières P, Fievet N. Regulatory T cell homing and activation is a signature of neonatal sepsis. Front Immunol 2024; 15:1420554. [PMID: 39072327 PMCID: PMC11272980 DOI: 10.3389/fimmu.2024.1420554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Accepted: 06/13/2024] [Indexed: 07/30/2024] Open
Abstract
Regulatory T cells (Treg) play a prominent role in utero tolerating non-inherited maternal antigens and in regulating immune responses against pathogens at birth. This study investigates Treg immunity in newborns in West Africa, where sepsis remains a major public health problem. Treg phenotypes on neonates subgroups with early-onset sepsis (EOS), presumed sepsis, and healthy newborn with and without prenatal risk factors were evaluated. Treg phenotypes varied according to prenatal conditions, with increase in Treg frequency and Foxp3 expression in healthy newborns with prenatal risk factors compared to those with none risk. Compared to healthy newborns with prenatal risk factors, EOS neonates had a significantly reduced frequency of Treg and Foxp3 expression. In the Treg pool, higher frequency of activated Treg was observed in EOS neonates, suggesting an in-utero activation upstream of the sepsis onset. Their migration to the infection site may explain the reduced frequency of circulating Integrin α4β1+ Treg suggestive of homing to the endothelial tissue. EOS neonates show increases expression of CTLA-4, PD-1 and CD39 on Treg, which negatively regulate the activation of effector T cells (Teff) corroborating by the lower frequency of Teff in EOS neonates. The higher frequency of CD39+ Treg and the lower frequency of integrinα4β1+ Treg in EOS non-survivor suggests that Treg exhaustement and endothelial homing are associated with outcome severity. Neonates developing EOS are born with an altered Treg phenotypic profile. Treg expression of CTLA-4, PD-1, CD39, and integrinα4β1 cell markers can be considered as early warning or diagnostic markers of EOS.
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Affiliation(s)
- Darius Sossou
- Paris-City University, Mére et Enfants en Milieu Tropical: pathogénes, systéme de santé et transition épidémiologique (MERIT), Institute of Research for Development (IRD), Paris, France
- Faculty of Sciences and Technology (FAST), University of Abomey-Calavi, Institute of Applied Biomedical Sciences (ISBA), Laboratory of Cell Biology and Physiology, Cotonou, Benin
- Institut de Recherche Clinique du Bénin (IRCB), Calavi, Benin
| | - Sem Ezinmegnon
- Faculty of Sciences and Technology (FAST), University of Abomey-Calavi, Institute of Applied Biomedical Sciences (ISBA), Laboratory of Cell Biology and Physiology, Cotonou, Benin
- Fédérations Hospitalo-Universitaires (FHU) Sepsis, AP-HP/Université Paris Saclay/Inserm, Le Kremlin-Bicêtre, France
| | - Gino Agbota
- Paris-City University, Mére et Enfants en Milieu Tropical: pathogénes, systéme de santé et transition épidémiologique (MERIT), Institute of Research for Development (IRD), Paris, France
- Institut de Recherche Clinique du Bénin (IRCB), Calavi, Benin
| | - Komi Gbedande
- Paris-City University, Mére et Enfants en Milieu Tropical: pathogénes, systéme de santé et transition épidémiologique (MERIT), Institute of Research for Development (IRD), Paris, France
- Institut de Recherche Clinique du Bénin (IRCB), Calavi, Benin
| | - Manfred Accrombessi
- Paris-City University, Mére et Enfants en Milieu Tropical: pathogénes, systéme de santé et transition épidémiologique (MERIT), Institute of Research for Development (IRD), Paris, France
- Institut de Recherche Clinique du Bénin (IRCB), Calavi, Benin
| | | | - Marceline d’Almeida
- Pediatric Department, National University Hospital Center (CNHU), Cotonou, Benin
| | - Jules M. Alao
- Pediatric Department, Mother and Child University and Hospital Center (CHUMEL), Cotonou, Benin
| | | | - Alexandre Pachot
- Medical Diagnostic Discovery Department, bioMérieux, Marcy l’Etoile, France
| | - Laurence Vachot
- Medical Diagnostic Discovery Department, bioMérieux, Marcy l’Etoile, France
| | | | - Gilles Cottrell
- Paris-City University, Mére et Enfants en Milieu Tropical: pathogénes, systéme de santé et transition épidémiologique (MERIT), Institute of Research for Development (IRD), Paris, France
| | - Akadiri Yessoufou
- Faculty of Sciences and Technology (FAST), University of Abomey-Calavi, Institute of Applied Biomedical Sciences (ISBA), Laboratory of Cell Biology and Physiology, Cotonou, Benin
| | - Valérie Briand
- Paris-City University, Mére et Enfants en Milieu Tropical: pathogénes, systéme de santé et transition épidémiologique (MERIT), Institute of Research for Development (IRD), Paris, France
| | - Pierre Tissières
- Fédérations Hospitalo-Universitaires (FHU) Sepsis, AP-HP/Université Paris Saclay/Inserm, Le Kremlin-Bicêtre, France
- Institute of Integrative Biology of the Cell (I2BC), Centre National de la Recherche Scientifique (CNRS), Commissariat à l'Energie Atomique et aux énergies alternatives (CEA), University Paris Saclay, Gif-sur-Yvette, France
- Pediatric Intensive Care and Neonatal Medicine, Assistance Publique - Hôpitaux de Paris (AP-HP) Paris Saclay University, Bicêtre Hospital, Le Kremlin-Bicêtre, France
| | - Nadine Fievet
- Paris-City University, Mére et Enfants en Milieu Tropical: pathogénes, systéme de santé et transition épidémiologique (MERIT), Institute of Research for Development (IRD), Paris, France
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4
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Sabir SF, Matti BF, Alwatar WMA. Assessment of regulatory T cells (Tregs) and Foxp3 methylation level in chronic myeloid leukemia patients on tyrosine kinase inhibitor therapy. Immunogenetics 2023; 75:145-153. [PMID: 36567345 DOI: 10.1007/s00251-022-01291-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/02/2022] [Indexed: 12/27/2022]
Abstract
The key cell population permits cancer cells to avoid immune-surveillance is regulatory T cells (Tregs). This study evaluates the level of Tregs in chronic myeloid leukemia (CML) patients and the effect of Tyrosine kinase inhibitor (TKI) on Treg levels, as a pathway to understand the immune response and behavior among advance stage and optimal response CML patients using imatinib therapy. Blood samples were collected from 30 CML patients (optimal response to TKI), 30 CML patients (failure response to TKI), and 30 age- and gender-matched controls. Analysis involved measuring percentages of Tregs (CD4 + CD25 + FOXP3 +) by flow cytometer and demethylation levels of FOXP3 Treg-specific demethylated region (TSDR) by PCR. The data revealed that Tregs and the FOXP3-TSDR demethylation percentages significantly increased in failure response group in comparison to the optimal response and control groups, while no significant difference between optimal response and control groups. Tregs and FOXP3 TSDR demethylation percentages showed high sensitivity and specificity, suggesting powerful discriminatory biomarkers between failure and optimal groups. An assessment of the Tregs and demethylation percentage among different BCR-ABL levels of CML patients on TKI revealed no significant differences in parameter percentage in the optimal response to TKI patients with different molecular responses (log 3 reduction or other deeper log 4.5 and 5 reduction levels). Our findings demonstrate an effective role of functional Tregs among different CML stages. Also, the study suggests that the major molecular response to therapy at level 0.1% of BCR-ABL transcript could be enough to induce immune system restoration in patients.
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Affiliation(s)
| | - Bassam Francis Matti
- Baghdad Teaching Hospital, Clinical Hematology Department, Medical City, Baghdad, Iraq
- Bone Marrow Transplant Center, Medical City, Baghdad, Iraq
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5
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A Nomogram Model for Individualized Prediction of the Risk of Respiratory Tract Infection within Six Months after Diagnosis in Patients with Primary Immune Thrombocytopenia. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:5002681. [PMID: 35936364 PMCID: PMC9352501 DOI: 10.1155/2022/5002681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/16/2022] [Accepted: 07/11/2022] [Indexed: 11/18/2022]
Abstract
The risk factors of upper respiratory tract infection (URI) within 6 months after diagnosis in patients with idiopathic thrombocytopenic purpura (ITP) were analyzed, and the nomogram model was established and verified, with 242 and 50 ITP patients as the training and validation set, respectively. The patients were followed up for six months after the diagnosis of ITP. The clinical data of patients were collected, and the risk factors of URI in ITP patients within six months after diagnosis were analyzed using univariable, followed by multivariable logistic regression. Among the 242 ITP patients in the training set, 52 cases (21.49%) had URI, including 24 cases of viral infection, 11 cases of Mycoplasma pneumoniae infection, and 17 cases of bacterial infection. Logistic regression analysis showed that advanced age, use of glucocorticoid, smoking history, platelet count, serum CRP level, and lymphocyte subsets CD4+ and CD8+ were all risk factors for ITP patients to develop symptoms within six months after diagnosis (P < 0.05). Using the above five indicators, a nomogram prediction model was built for URI occurrence in patients with ITP within half a year after diagnosis, and the results showed an AUC, a sensitivity, and a specificity of 0.936 (95% CI: 0.878-0.983), 0.942, and 0.865, respectively. The nomogram model was internally verified by the bootstrap method for 500 self-sampling times, and the prediction of the calibration curve was in high consistency with the real results. External validation of the nomogram model resulted in an AUC, a sensitivity, and a specificity of 0.890 (95% CI: 0.757-0.975), 0.949, and 0.727, respectively. The nomogram model of URI in ITP patients within half a year after diagnosis based on logistic regression analysis has good discrimination and prediction accuracy. This provides important guidance value for individualized prediction of URI in ITP patients.
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Sobas M, Podolak-Dawidziak M, Lewandowski K, Bator M, Wróbel T. Primary Immune Thrombocytopenia and Essential Thrombocythemia: So Different and yet Somehow Similar-Cases Series and a Review of the Literature. Int J Mol Sci 2021; 22:10918. [PMID: 34681577 PMCID: PMC8539407 DOI: 10.3390/ijms222010918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/02/2021] [Accepted: 10/06/2021] [Indexed: 12/02/2022] Open
Abstract
This article collects several published cases in which immune thrombocytopenic purpura (ITP) is followed by essential thrombocythemia (ET) and vice versa. This surprising clinical condition is possible, but very rare and difficult to diagnose and manage. We have made an attempt to analyse the possible causes of the sequential appearance of ITP and ET taking into consideration the following: alteration of the thrombopoietin (TPO) receptor, the role of autoimmunity and inflammation, and cytokine modulation. A better understanding of these interactions may provide opportunities to determine predisposing factors and aid in finding new treatment modalities both for ITP and ET patients.
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Affiliation(s)
- Marta Sobas
- Department of Hematology, Blood Neoplasms and Bone Marrow Transplantation, Wroclaw Medical University, Pasteura 4, 50-367 Wroclaw, Poland; (M.P.-D.); (M.B.); (T.W.)
| | - Maria Podolak-Dawidziak
- Department of Hematology, Blood Neoplasms and Bone Marrow Transplantation, Wroclaw Medical University, Pasteura 4, 50-367 Wroclaw, Poland; (M.P.-D.); (M.B.); (T.W.)
| | - Krzysztof Lewandowski
- Hematology and Bone Marrow Transplantation Department, University of Medical Sciences, 60-569 Poznan, Poland;
| | - Michał Bator
- Department of Hematology, Blood Neoplasms and Bone Marrow Transplantation, Wroclaw Medical University, Pasteura 4, 50-367 Wroclaw, Poland; (M.P.-D.); (M.B.); (T.W.)
| | - Tomasz Wróbel
- Department of Hematology, Blood Neoplasms and Bone Marrow Transplantation, Wroclaw Medical University, Pasteura 4, 50-367 Wroclaw, Poland; (M.P.-D.); (M.B.); (T.W.)
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7
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Du SH, Xiang YJ, Liu L, Nie M, Hou Y, Wang L, Li BB, Xu M, Teng QL, Peng J, Hou M, Shi Y. Co-Inhibition of the Immunoproteasome Subunits LMP2 and LMP7 Ameliorates Immune Thrombocytopenia. Front Immunol 2021; 11:603278. [PMID: 33552061 PMCID: PMC7855704 DOI: 10.3389/fimmu.2020.603278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 12/07/2020] [Indexed: 12/26/2022] Open
Abstract
The immunoproteasome, a special isoform of the 20S proteasome, is expressed when the cells receive an inflammatory signal. Immunoproteasome inhibition proved efficacy in the treatment of autoimmune diseases. However, the role of the immunoproteasome in the pathogenesis of immune thrombocytopenia (ITP) remains unknown. We found that the expression of the immunoproteasome catalytic subunit, large multifunctional protease 2 (LMP2), was significantly upregulated in peripheral blood mononuclear cells of active ITP patients compared to those of healthy controls. No significant differences in LMP7 expression were observed between patients and controls. ML604440, an specific LMP2 inhibitor, had no significant impact on the platelet count of ITP mice, while ONX-0914 (an inhibitor of both LMP2 and LMP7) increased the number of platelets. In vitro assays revealed that ONX-0914 decreased the expression of FcγRI in ITP mice and decreased that of FcγRIII in ITP patients, inhibited the activation of CD4+ T cells, and affected the differentiation of Th1 cells in patients with ITP. These results suggest that the inhibition of immunoproteasome is a potential therapeutic approach for ITP patients.
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Affiliation(s)
- Sheng-hong Du
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Department of Hematology, Taian Central Hospital, Taian, China
| | - Yu-jiao Xiang
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lu Liu
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Mu Nie
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Yu Hou
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ling Wang
- Department of Hematology, Taian Central Hospital, Taian, China
| | - Ban-ban Li
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Department of Hematology, Taian Central Hospital, Taian, China
| | - Miao Xu
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qing-liang Teng
- Department of Hematology, Taian Central Hospital, Taian, China
| | - Jun Peng
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Immunohematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ming Hou
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Immunohematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Provincial Clinical Research Center in Hematological Diseases, Jinan, China
- Leading Research Group of Scientific Innovation, Department of Science and Technology of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yan Shi
- Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
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CD4 + T cell phenotypes in the pathogenesis of immune thrombocytopenia. Cell Immunol 2020; 351:104096. [PMID: 32199587 DOI: 10.1016/j.cellimm.2020.104096] [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: 12/24/2019] [Revised: 03/03/2020] [Accepted: 03/12/2020] [Indexed: 12/14/2022]
Abstract
Immune thrombocytopenia (ITP) is an autoimmune disorder characterized by low platelet counts due to enhanced platelet clearance and compromised production. Traditionally, ITP was regarded a B cell mediated disorder as anti-platelet antibodies are detected in most patients. The very nature of self-antigens, evident processes of isotype switching and the affinity maturation of anti-platelet antibodies indicate that B cells in order to mount anti-platelet immune response require assistance of auto-reactive CD4+ T cells. For a long time, ITP pathogenesis has been exclusively reviewed through the prism of the disturbed balance between Th1 and Th2 subsets of CD4+ T cells, however, more recently new subsets of these cells have been described including Th17, Th9, Th22, T follicular helper and regulatory T cells. In this paper, we review the current understanding of the role and immunological mechanisms by which CD4+ T cells contribute to the pathogenesis of ITP.
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Shabeeb Z, Faraj Y, Mahmood M, Mtashar B. Interplaying of regulatory T-cells and related chemokines in immune thrombocytopenic purpura patients. IRAQI JOURNAL OF HEMATOLOGY 2020. [DOI: 10.4103/ijh.ijh_40_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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10
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Wang Q, Li J, Yu TS, Liu Y, Li K, Liu S, Liu Y, Feng Q, Zhang L, Li GS, Shao LL, Peng J, Hou M, Liu XG. Disrupted balance of CD4 + T-cell subsets in bone marrow of patients with primary immune thrombocytopenia. Int J Biol Sci 2019; 15:2798-2814. [PMID: 31853219 PMCID: PMC6909963 DOI: 10.7150/ijbs.33779] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 10/05/2019] [Indexed: 12/18/2022] Open
Abstract
Disequilibrium of CD4+ T-cell subpopulations in peripheral blood (PB) of patients with primary immune thrombocytopenia (ITP) has been well established, whereas the profile of CD4+ T-cell subpopulations in bone marrow (BM) remains elusive. In the present study, the frequencies of T helper 22 (Th22), Th17, Th1, Th2, follicular T helper (Tfh) cells and regulatory T cells (Tregs) as well as their effector cytokines in BM and PB from active ITP patients and healthy controls (HCs) were determined. Results showed that the frequencies of Th22, Th17, Th1, and Tfh cells were significantly higher, but Treg number was remarkably lower in BM from ITP patients than from HCs. In the ITP group, it was notable that the numbers of BM Th22, Th17, Th1, Th2, and Tfh cells were significantly elevated compared with the matched PB counterparts, while Treg number in BM was considerably reduced compared with that in PB. In consistence with the BM Th subset pattern, plasma levels of interleukin (IL)-22, IL-17A, and interferon (INF)-γ in BM from ITP patients were significantly increased compared with that from HCs. Therefore, the balance of CD4+ T-cell subsets was disrupted in both BM and PB of ITP patients, suggesting that this might play important roles in the pathophysiological process of ITP.
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Affiliation(s)
- Qian Wang
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China.,Department of Clinical Laboratory, Qilu Hospital, Shandong University (Qingdao), 758 Hefei Road, Qingdao, P. R. China
| | - Juan Li
- Department of Clinical Laboratory, Qilu Hospital, Shandong University (Qingdao), 758 Hefei Road, Qingdao, P. R. China
| | - Tian-Shu Yu
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China
| | - Yu Liu
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, 3501 Daxue Road, Jinan, P. R. China
| | - Kai Li
- Department of Radiotherapy, Zhangqiu People's Hospital, 1920 Huiquan Road, Jinan, P. R. China
| | - Shuang Liu
- Department of Hematology, Taian Central Hospital, Taian, P. R. China
| | - Yang Liu
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China
| | - Qi Feng
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China
| | - Lei Zhang
- Department of Orthopedics, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Guo-Sheng Li
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China
| | - Lin-Lin Shao
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China
| | - Jun Peng
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China
| | - Ming Hou
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China.,Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Jinan, China
| | - Xin-Guang Liu
- Department of Hematology, Qilu Hospital, Shandong University, 107 West Wenhua Road, Jinan, P. R. China
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Chen Y, Zhou Y, Chen P, Zhang P, Jia M, Tang Y. Excessive expressions of T cell activation markers in pediatric immune thrombocytopenia. Thromb Res 2019; 180:1-9. [DOI: 10.1016/j.thromres.2019.05.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 05/10/2019] [Accepted: 05/14/2019] [Indexed: 11/30/2022]
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Cao J, Zhang C, Han X, Cheng H, Chen W, Qi K, Qiao J, Sun Z, Wu Q, Zeng L, Niu M, Li L, Xu K. Emerging role of stem cell memory-like T cell in immune thrombocytopenia. Scand J Immunol 2019; 89:e12739. [PMID: 30506564 DOI: 10.1111/sji.12739] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 11/23/2018] [Accepted: 11/26/2018] [Indexed: 12/24/2022]
Affiliation(s)
- Jiang Cao
- Department of Hematology; The Affiliated Hospital of Xuzhou Medical University; Xuzhou China
| | - Changxiao Zhang
- Department of Endocrinology; Xuzhou City Hospital of Traditional Chinese Medicine; Xuzhou China
| | - Xiao Han
- Department of Hematology; The Affiliated Hospital of Xuzhou Medical University; Xuzhou China
| | - Hai Cheng
- Department of Hematology; The Affiliated Hospital of Xuzhou Medical University; Xuzhou China
| | - Wei Chen
- Department of Hematology; The Affiliated Hospital of Xuzhou Medical University; Xuzhou China
| | - Kunming Qi
- Department of Hematology; The Affiliated Hospital of Xuzhou Medical University; Xuzhou China
| | - Jianlin Qiao
- Jiangsu Bone Marrow Stem Cell Institute; Xuzhou China
| | - Zengtian Sun
- Jiangsu Bone Marrow Stem Cell Institute; Xuzhou China
| | - Qingyun Wu
- Jiangsu Bone Marrow Stem Cell Institute; Xuzhou China
| | - Lingyu Zeng
- Jiangsu Bone Marrow Stem Cell Institute; Xuzhou China
| | - Mingshan Niu
- Jiangsu Bone Marrow Stem Cell Institute; Xuzhou China
| | - Li Li
- Department of Gastroenterology; The Affiliated Hospital of Xuzhou Medical University; Xuzhou China
| | - Kailin Xu
- Department of Hematology; The Affiliated Hospital of Xuzhou Medical University; Xuzhou China
- Jiangsu Bone Marrow Stem Cell Institute; Xuzhou China
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13
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Goubran H, Hart C, Othman I, Seghatchian J. Flow cytometry and immune thrombocytopenic purpura. Transfus Apher Sci 2018; 57:800-803. [PMID: 30473467 DOI: 10.1016/j.transci.2018.10.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Although Immune thrombocytopenic purpura is a common disorder that family physicians, internists and hematologists face in their everyday practice, its diagnosis rests only on "exclusion" and its therapy is based on algorithms where "trial and error" is the rule. Flow cytometry, if simplified and standardized, could provide a quicker and better diagnostic accuracy. Studies of the lymphocyte subset using flow cytometry and more elaborate immune studies are paving the way for a better understanding of the disease and in identification of prognostic markers. Such studies may even help stratify the first-line therapy responder and assist in the use of the arsenal of immune suppressive therapy with better precision.
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Affiliation(s)
- Hadi Goubran
- Saskatoon Cancer Centre, College of Medicine, University of Saskatchewan, Canada.
| | - Caroline Hart
- Saskatoon Cancer Centre, College of Medicine, University of Saskatchewan, Canada
| | - Ibraheem Othman
- Alain Blair Cancer Centre, College of Medicine, University of Saskatchewan, Canada
| | - Jerard Seghatchian
- International Consultancy in Blood Components Quality/Safety, Audit/Injection and DDR Strategies, London, UK.
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Soliman MA, Helwa MA, Fath-Allah SK, El-Hawy MA, Badr HS, Barseem NF. IL-10 polymorphisms and T-cell subsets could affect the clinical presentation and outcome of childhood immune thrombocytopenia in Egyptian population. APMIS 2018; 126:380-388. [DOI: 10.1111/apm.12823] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 01/26/2018] [Indexed: 01/16/2023]
Affiliation(s)
- Mohamed A. Soliman
- Department of Clinical Pathology; Faculty of Medicine; Menoufia University; Menoufia Egypt
| | - Mohamed A. Helwa
- Department of Clinical Pathology; Faculty of Medicine; Menoufia University; Menoufia Egypt
| | - Samar K. Fath-Allah
- Department of Clinical Pathology; Faculty of Medicine; Menoufia University; Menoufia Egypt
| | - Mahmoud A. El-Hawy
- Department of Pediatrics; Faculty of Medicine; Menoufia University; Menoufia Egypt
| | - Hassan S. Badr
- Department of Pediatrics; Faculty of Medicine; Menoufia University; Menoufia Egypt
| | - Naglaa Fathy Barseem
- Department of Pediatrics; Faculty of Medicine; Menoufia University; Menoufia Egypt
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15
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El-Rashedi FH, El-Hawy MA, Helwa MA, Abd-Allah SS. Study of CD4 + , CD8 + , and natural killer cells (CD16 + , CD56 + ) in children with immune thrombocytopenic purpura. Hematol Oncol Stem Cell Ther 2017; 10:8-14. [DOI: 10.1016/j.hemonc.2017.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 12/17/2016] [Accepted: 01/04/2017] [Indexed: 10/20/2022] Open
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16
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Zhou J, Zhou Y, Wen J, Sun X, Zhang X. Circulating myeloid-derived suppressor cells predict disease activity and treatment response in patients with immune thrombocytopenia. ACTA ACUST UNITED AC 2017; 50:e5637. [PMID: 28225866 PMCID: PMC5343560 DOI: 10.1590/1414-431x20165637] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 09/29/2016] [Indexed: 02/22/2023]
Abstract
Immune thrombocytopenia (ITP) is a disease characterized by isolated thrombocytopenia. Abnormal effector T cell activation is an important mechanism in the pathogenesis of ITP. Regulatory T cells (Treg) have a strong immunosuppressive function for T cell activation and their importance in the pathophysiology and clinical treatment of ITP has been confirmed. Myeloid-derived suppressor cells (MDSCs) are other immunosuppressive cells, which can also suppress T cell activation by secreting arginase, iNOS and ROS, and are essential for Treg cells’ differentiation and maturation. Therefore, we speculate that MDSCs might also be involved in the immune-dysregulation mechanism of ITP. In this study, we tested MDSCs and Treg cells in peripheral blood samples of twenty-five ITP patients and ten healthy donors. We found that MDSCs and Treg cells decreased simultaneously in active ITP patients. Relapsed ITP patients showed lower MDSCs levels compared with new patients. All patients received immunosuppressive treatment including dexamethasone alone or in combination with intravenous immune globulin. We found that MDSCs’ level after treatment correlated with platelet recovery. Our study is the first that focused on MDSCs’ role in ITP. Based on our results, we concluded that circulating MDSCs could predict disease activity and treatment response in ITP patients. This preliminary conclusion indicates a substantial significance of MDSCs in the pathophysiology and clinical treatment of ITP, which deserves further investigation.
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Affiliation(s)
- J Zhou
- Hematology Department, The Second Medical College, Shenzhen People's Hospital, Jinan University, Shenzhen, Guangdong Province, China
| | - Y Zhou
- Hematology Department, The Second Medical College, Shenzhen People's Hospital, Jinan University, Shenzhen, Guangdong Province, China
| | - J Wen
- Hematology Department, The Second Medical College, Shenzhen People's Hospital, Jinan University, Shenzhen, Guangdong Province, China
| | - X Sun
- Hematology Department, The Second Medical College, Shenzhen People's Hospital, Jinan University, Shenzhen, Guangdong Province, China
| | - X Zhang
- Hematology Department, The Second Medical College, Shenzhen People's Hospital, Jinan University, Shenzhen, Guangdong Province, China
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17
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Consolini R, Legitimo A, Caparello MC. The Centenary of Immune Thrombocytopenia - Part 1: Revising Nomenclature and Pathogenesis. Front Pediatr 2016; 4:102. [PMID: 27807534 PMCID: PMC5069646 DOI: 10.3389/fped.2016.00102] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/07/2016] [Indexed: 12/24/2022] Open
Abstract
The natural history of the immune thrombocytopenia (ITP) is interesting and intriguing because it traces different steps underlying autoimmune diseases. The review points out the main steps that have accompanied the stages of its history and the consequential changes related to its terminology. ITP is an autoimmune disease resulting from platelet antibody-mediated destruction and impaired megakaryocyte and platelet production. However, research advances highlight that a complex dysregulation of the immune system is involved in the pathogenesis of this condition. The review examines the role of the multiple immune components involved in the autoimmunity process, focusing on the more recent mechanisms, which could be new promising therapeutic targets for ITP patients.
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Affiliation(s)
- Rita Consolini
- Laboratory of Immunology, Department of Clinical and Experimental Medicine, Division of Pediatrics, University of Pisa , Pisa , Italy
| | - Annalisa Legitimo
- Laboratory of Immunology, Department of Clinical and Experimental Medicine, Division of Pediatrics, University of Pisa , Pisa , Italy
| | - Maria Costanza Caparello
- Laboratory of Immunology, Department of Clinical and Experimental Medicine, Division of Pediatrics, University of Pisa , Pisa , Italy
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18
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Yan Z, Li Z, Zhang H, Chen C, Li D, Xing W, Li H, Chen W, Cheng H, Cao J, Xu K. [Efficacy of high-dose dexamethasone plus low-dose rituximab as a second-line treatment in 65 patients with primary immune thrombocytopenia]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2015; 36:206-9. [PMID: 25854463 PMCID: PMC7342512 DOI: 10.3760/cma.j.issn.0253-2727.2015.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
目的 观察大剂量地塞米松联合小剂量利妥昔单抗作为二线方案治疗原发免疫性血小板减少症(ITP)的疗效和安全性。 方法 65例ITP患者纳入研究,其中糖皮质激素依赖52例、糖皮质激素无效13例;男35例,女30例,中位年龄34(18~70)岁。治疗方案:地塞米松40 mg/d,第1~4天静脉滴注,利妥昔单抗100 mg,第7、14、21、28天静脉滴注。治疗前及治疗后12个月应用流式细胞术检测外周血调节性T细胞(Treg)、B淋巴细胞活化因子(BAFF)、IL-2、IL-10、可溶性白细胞分化抗原40配体(sCD40L)。 结果 全部65例患者治疗1个月时总有效率为81.5%(53/65),第3、6、12个月时完全反应率分别为72.3%(47/65)、66.2%(43/65)、63.1%(41/65)。糖皮质激素依赖的52例患者治疗1个月时总有效率为90.3%(47/52),第3、6、12个月时完全反应率为80.8%(42/52)、76.9%(40/52)、73.1%(38/52)。治疗12个月41例完全反应患者的外周血Treg细胞水平高于治疗前[(3.01±0.95)%对(1.69±0.35)%,P=0.032],BAFF、IL-2、sCD40L均低于治疗前[(648.03±79.63)ng/L对(972.35±93.64)ng/L,P=0.001;(2.84±0.32)ng/L对(4.18±0.46)ng/L,P=0.012;(4.55±0.66)ng/L对(7.73±1.04)ng/L,P=0.006],IL-10与治疗前比较差异无统计学意义(P=0.136)。所有患者均完成了治疗,不良事件发生率为52.3%(39/65)。 结论 大剂量地塞米松联合小剂量利妥昔单抗对常规剂量糖皮质激素治疗无效或依赖的患者仍有较高的反应率,不良反应发生率可接受。
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Affiliation(s)
- Zhiling Yan
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Zhenyu Li
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Huanxin Zhang
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Chong Chen
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Depeng Li
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Weiwei Xing
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Hujun Li
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Wei Chen
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Hai Cheng
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Jiang Cao
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Kailin Xu
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
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Association of primary immune thrombocytopenia and common allergic diseases among children. Pediatr Res 2015; 77:597-601. [PMID: 25580738 DOI: 10.1038/pr.2015.6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 10/08/2014] [Indexed: 11/08/2022]
Abstract
BACKGROUND Growing evidence has revealed a link between autoimmune and allergic diseases. However, few studies have assessed the relationship between allergic diseases and primary immune thrombocytopenia (ITP), an autoimmune disease frequently occurring in children. This population-based case-control study investigated the association between common allergic diseases and the subsequent risk of developing ITP during childhood. METHODS This study investigated 1,203 children younger than 18 y of age who were diagnosed with ITP between 1998 and 2008, as well as 4,812 frequency-matched controls. The odds ratios of the association between ITP and preexisting allergic diseases were calculated. RESULTS Children with every type of allergic disease examined in this study (except asthma) exhibited an increased risk of developing ITP; the lowest adjusted odds ratio (aOR) was 1.39 for allergic conjunctivitis (95% confidence interval (CI) = 1.09-1.79), whereas the greatest aOR was 1.84 for allergic rhinitis (95% CI = 1.49-2.27). The aORs increased with the number of concurrent allergic diseases to 2.89 (95% CI = 1.98-4.22) for children with at least three allergic diseases. CONCLUSION Children with atopic diathesis have a greater risk of subsequently developing ITP. The fundamental determinants of this relationship warrant further study.
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Chen K, Zhou QX, Shan HW, Li WF, Lin ZF. Prognostic value of CD4(+)CD25(+) Tregs as a valuable biomarker for patients with sepsis in ICU. World J Emerg Med 2015; 6:40-3. [PMID: 25802565 DOI: 10.5847/wjem.j.1920-8642.2015.01.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 01/10/2015] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Sepsis is a common complication of infections, burns, traumas, surgeries, poisonings, and post-cardiopulmonary resuscitation. The present study aimed to investigate prognostic value of CD4(+)CD25(+) regulatory T cells (Treg) in peripheral blood of patients with sepsis. METHODS Periphery blood from 28 patients diagnosed with sepsis was collected on day 1 and 7 after hospitalization in the ICU of Shanghai Changzheng Hospital between December 2013 to April 2014. The blood was used for analyses of Treg ratio using flow cytometry and for analyses of blood routine test, C-reactive protein (CRP), bilirubin, procalcitonin (PCT), and coagulation. APACHE II and sequential organ failure assessment (SOFA) scores were also investigated. The results were compared between two outcome groups of survival or death to evaluate prognostic value for sepsis. RESULTS The patients had an average age of 60.36±15.03 years, APACHE II score 16.68±7.00, and SOFA score 7.18±3.78. Among the 28 patients, 12 had severe trauma (42.9%), 10 had septic shock (35.7%), and 9 (32.2%) died. The median ratio of Tregs was 2.10% (0.80%, 3.10%) in the survival group vs. 1.80% (1.15%, 3.65%) in the death group (Z=-0.148, P=0.883) on day 1; however it was significantly changed to 0.90% (0.30%, 2.80%) vs. 5.70% (2.60%, 8.30%) (Z=-2.905, P=0.004). CONCLUSION With better prospects for clinical application, dynamic monitoring of Tregs ratio in peripheral blood has potential value in predicting prognosis of sepsis.
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Affiliation(s)
- Kun Chen
- Emergency Department, Changzheng Hospital, Second Military Medical Univercity, Shanghai 200003, China
| | - Qiu-Xiang Zhou
- Emergency Department, Changzheng Hospital, Second Military Medical Univercity, Shanghai 200003, China
| | - Hong-Wei Shan
- Emergency Department, Changzheng Hospital, Second Military Medical Univercity, Shanghai 200003, China
| | - Wen-Fang Li
- Emergency Department, Changzheng Hospital, Second Military Medical Univercity, Shanghai 200003, China
| | - Zhao-Fen Lin
- Emergency Department, Changzheng Hospital, Second Military Medical Univercity, Shanghai 200003, China
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Talaat RM, Elmaghraby AM, Barakat SS, EL-Shahat M. Alterations in immune cell subsets and their cytokine secretion profile in childhood idiopathic thrombocytopenic purpura (ITP). Clin Exp Immunol 2014; 176:291-300. [PMID: 24460857 PMCID: PMC3992042 DOI: 10.1111/cei.12279] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2014] [Indexed: 12/22/2022] Open
Abstract
Immune thrombocytopenic purpura (ITP) is acquired autoimmune disease in children characterized by the breakdown of immune tolerance. This work is designed to explore the contribution of different lymphocyte subsets in acute and chronic ITP children. Imbalance in the T helper type 1 (Th1)/Th2 cytokine secretion profile was investigated. The frequency of T (CD3(+), CD4(+), CD8(+)) and B (CD19(+)) lymphocytes, natural killer (NK) (CD16(+) 56(+)) and regulatory T (T(reg)) [CD4(+) CD25(+high) forkhead box protein 3 (FoxP3)(+) ] cells was investigated by flow cytometry in 35 ITP children (15 acute and 20 chronic) and 10 healthy controls. Plasma levels of Th1 cytokines [interferon (IFN-γ) and tumour necrosis factor (TNF-α)] and Th2 [interleukin (IL)-4, IL-6 and IL-10)] cytokines were measured using enzyme-linked immunosorbent assay (ELISA). The percentage of Treg (P < 0·001) and natural killer (NK) (P < 0·001) cells were significantly decreased in ITP patients compared to healthy controls. A negative correlation was reported between the percentage of T(reg) cells and development of acute (r = -0·737; P < 0·01) and chronic (r = -0·515; P < 0·01) disease. All evaluated cytokines (IFN-γ, TNF-α, IL-4, IL-6 and IL-10) were elevated significantly in ITP patients (P < 0·001, P < 0·05, P < 0·05, P < 0·05 and P < 0·001, respectively) compared to controls. In conclusion, our data shed some light on the fundamental role of immune cells and their related cytokines in ITP patients. The loss of tolerance in ITP may contribute to the dysfunction of T(regs). Understanding the role of T cell subsets will permit a better control of autoimmunity through manipulation of their cytokine network.
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Affiliation(s)
- R M Talaat
- Molecular Biology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat CitySadat City, Egypt
| | - A M Elmaghraby
- Molecular Biology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat CitySadat City, Egypt
| | - S S Barakat
- Pediatrics Department, Faculty of Medicine, Alexandria UniversityAlexandria, Egypt
| | - M EL-Shahat
- Molecular Biology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat CitySadat City, Egypt
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22
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Prognostic value of regulatory T cells in newly diagnosed chronic myeloid leukemia patients. Int J Clin Oncol 2013; 19:753-60. [DOI: 10.1007/s10147-013-0615-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 08/21/2013] [Indexed: 11/25/2022]
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