scholarly journals Analysis of the myeloid-derived suppressor cells and annexin A1 in multibacillary leprosy and reactional episodes

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Stephanni Figueiredo da Silva ◽  
Leticia Rossetto da Silva Cavalcante ◽  
Ezequiel Angelo Fonseca Junior ◽  
Joselina Maria da Silva ◽  
José Cabral Lopes ◽  
...  
Keyword(s):  
Suppressor Cells ◽  
Suppressor Cell ◽  
Mycobacterium Leprae ◽  
Histopathological Analysis ◽  
Annexin A1 ◽  
Myeloid Derived Suppressor Cells ◽  
Myeloid Derived Suppressor Cell ◽  
Leprosy Patients ◽  
Multibacillary Leprosy

Abstract Background Leprosy is a chronic infectious disease caused by Mycobacterium leprae. Patients have distinct clinical forms, and the host´s immunological response regulate those manifestations. In this work, the presence of the myeloid-derived suppressor cell and the regulatory protein annexin A1 is described in patients with multibacillary leprosy and with type 1 and 2 reactions. Methods Patients were submitted to skin biopsy for histopathological analysis to obtain a bacilloscopic index. Immunofluorescence was used to detect myeloid-derived suppressor cells and annexin A1. Results The data demonstrated that the presence of granulocytic and monocytic myeloid-derived suppressor cells in leprosy patients. A high number of monocytic myeloid-derived suppressor cells were observed in lepromatous leprosy and type 2 reactional patients. The presence of annexin A1 was observed in all myeloid-derived suppressor cells. In particular, the monocytic myeloid-derived suppressor cell in the lepromatous patients has higher levels of this protein when compared to the reactional patients. This data suggest that the higher expression of this protein may be related to regulatory response against a severe infection, contributing to anergic response. In type 1 reactional patients, the expression of annexin A1 was reduced. Conclusions Myeloid-derived suppressor cell are present in leprosy patients and annexin A1 might be regulated the host response against Mycobacterium leprae.

Analysis of the Myeloid-Derived Suppressor Cells and Annexin A1 in Multibacillary Leprosy and Reactional Episodes

2020 ◽  
Author(s):  
Amilcar Sabino Damazo ◽  
Stephanni Figueiredo da Silva ◽  
Leticia Rossetto da Silva Cavalcante ◽  
Ezequiel Angelo Fonseca Junior ◽  
Joselina Maria da Silva ◽  
...  
Keyword(s):  
Suppressor Cells ◽  
Suppressor Cell ◽  
Mycobacterium Leprae ◽  
Histopathological Analysis ◽  
Annexin A1 ◽  
Myeloid Derived Suppressor Cells ◽  
Myeloid Derived Suppressor Cell ◽  
Leprosy Patients ◽  
Multibacillary Leprosy

Abstract Background: Leprosy is a chronic infectious disease caused by Mycobacterium leprae. Patients have distinct clinical forms, and host´s immunological response regulate those manifestations. In this work, the presence of the myeloid-derived suppressor cell and the regulatory protein annexin A1 is described in patients with multibacillary leprosy and with type 1 and 2 reactions. Methods: Patients were submitted to skin biopsy for histopathological analysis to obtain bacilloscopic index. Immunofluorescence was used to detect myeloid-derived suppressor cells and annexin A1.Results: The data demonstrated that the presence of granulocytic and monocytic myeloid-derived suppressor cells in leprosy patients. The high number of monocytic myeloid-derived suppressor cells were observed in lepromatous leprosy and type 2 reactional patients with Bacillus Calmette–Guérin (BCG) vaccination scar. The presence of annexin A1 was observed in all myeloid-derived suppressor cells. In particularly, the monocytic myeloid-derived suppressor cell in the lepromatous patients has higher levels of this protein when compared to the reactional patients. This data suggest that the higher expression of this protein may be related to regulatory response against a severe infection, contributing to anergic response. In type 1 reactional patients, the expression of annexin A1 was reduced. Conclusions: Myeloid-derived suppressor cell are present in leprosy patients and annexin A1 might be regulated the host response against Mycobacterium leprae.

Metabolic changes and interaction of tumor cell, myeloid-derived suppressor cell and T cell in hypoxic microenvironment

2020 ◽  
Author(s):  
Xiantu Ou ◽  
Weibiao Lv
Keyword(s):  
Tumor Microenvironment ◽  
Regulatory Protein ◽  
Tumor Hypoxia ◽  
Suppressor Cells ◽  
Suppressor Cell ◽  
Inflammatory Factors ◽  
Tumor Escape ◽  
Myeloid Derived Suppressor Cells ◽  
Myeloid Derived Suppressor Cell ◽  
Transcriptional Regulatory

It is universally acknowledged that a large number of immune cells, as well as inflammatory factors, regulatory factors and metabolites, accumulate in the tumor microenvironment to jointly promote tumor escape, development and metastasis. Hypoxia is one of the characteristics in tumor microenvironment and is a common phenomenon in all solid tumors. In tumor hypoxia response, there is a key regulator called HIF-1a, which is a key transcriptional regulatory protein that regulates many critical genes. In this paper, the effects of hypoxia on glucose metabolism of tumor cells, myeloid-derived suppressor cells and T cells in tumor microenvironment were reviewed, and the interaction among the three was also described.

scholarly journals Clinical profile and deformities in leprosy patients: a record based study

2020 ◽  
Vol 6 (2) ◽  
pp. 156
Author(s):  
Anita Sanker ◽  
Sandhya George ◽  
Sindhu Chunangat Bhaskaramenon
Keyword(s):  
Public Health Problem ◽  
Mycobacterium Leprae ◽  
Clinical Profile ◽  
Current Status ◽  
Age Group ◽  
Medical College ◽  
Tribal Area ◽  
Leprosy Patients ◽  
Multibacillary Leprosy

<p class="abstract"><strong>Background:</strong> Leprosy is a chronic disease caused by <em>Mycobacterium leprae</em>, infectious in some cases, and affecting the peripheral nervous system, skin and certain other tissues. Even though leprosy was declared eliminated as a public health problem in India on December 2005, new cases of leprosy continue to appear. Hence a study on clinical profile and deformities in all leprosy cases registered in the last 5 years was done to know the current status of leprosy in this area.</p><p class="abstract"><strong>Methods: </strong>This was a retrospective record-based study of leprosy cases done at Government Medical College, Manjeri, for a period of 5 years from October 2014 to September 2019.<strong></strong></p><p class="abstract"><strong>Results:</strong> 42 cases from the record were included in the study. Maximum cases belonged to the age group of 31 to 40 and males were more than females. 81% of the patients were multibacillary leprosy (MB) and 8 cases belonged to paucibacillary (PB) leprosy. Four child cases were registered as PB cases. Mostly encountered clinical diagnosis was borderline tuberculoid leprosy (23 out of 42) and two had type 1 reaction. Seven patients had deformity of which two had grade 2 deformity and rest had grade 1 deformity.</p><p><strong>Conclusions:</strong> One patient who presented with grade 2 deformity and type 1 reaction was from tribal area indicating low awareness about leprosy among them. More number of cases in the multibacillary group and presence of child cases and deformities reinforces the need for strict surveillance to eradicate leprosy. </p>

scholarly journals Anti-HMGB1 Monoclonal Antibody Ameliorates Immunosuppression after Peripheral Tissue Trauma: Attenuated T-Lymphocyte Response and Increased Splenic CD11b+Gr-1+Myeloid-Derived Suppressor Cells Require HMGB1

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xiangcai Ruan ◽  
Sophie S. Darwiche ◽  
Changchun Cai ◽  
Melanie J. Scott ◽  
Hans-Christoph Pape ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
T Lymphocyte ◽  
Tissue Injury ◽  
High Mobility ◽  
Suppressor Cells ◽  
Suppressor Cell ◽  
Peripheral Tissue ◽  
Myeloid Derived Suppressor Cells ◽  
Myeloid Derived Suppressor Cell ◽  
Tissue Trauma

Although tissue-derived high mobility group box 1 (HMGB1) is involved in many aspects of inflammation and tissue injury after trauma, its role in trauma-induced immune suppression remains elusive. Using an established mouse model of peripheral tissue trauma, which includes soft tissue and fracture components, we report here that treatment with anti-HMGB1 monoclonal antibody ameliorated the trauma-induced attenuated T-cell responses and accumulation of CD11b+Gr-1+myeloid-derived suppressor cells in the spleens seen two days after injury. Our data suggest that HMGB1 released after tissue trauma contributes to signaling pathways that lead to attenuation of T-lymphocyte responses and enhancement of myeloid-derived suppressor cell expansion.

scholarly journals Emerging Roles of Myeloid-Derived Suppressor Cells in Diabetes

2021 ◽  
Vol 12 ◽  
Author(s):  
Shiqi Wang ◽  
Qian Tan ◽  
Yayi Hou ◽  
Huan Dou
Keyword(s):  
Insulin Resistance ◽  
Immune Cells ◽  
Suppressor Cells ◽  
Suppressor Cell ◽  
Heterogeneous Population ◽  
Myeloid Derived Suppressor Cells ◽  
Pathological Characteristics ◽  
Myeloid Derived Suppressor Cell ◽  
Combined Action ◽  
Immature Cells

Diabetes is a syndrome characterized by hyperglycemia with or without insulin resistance. Its etiology is attributed to the combined action of genes, environment and immune cells. Myeloid-derived suppressor cell (MDSC) is a heterogeneous population of immature cells with immunosuppressive ability. In recent years, different studies have debated the quantity, activity changes and roles of MDSC in the diabetic microenvironment. However, the emerging roles of MDSC have not been fully documented with regard to their interactions with diabetes. Here, the manifestations of MDSC and their subsets are reviewed with regard to the incidence of diabetes and diabetic complications. The possible drugs targeting MDSC are discussed with regard to their potential of treating diabetes. We believe that understanding MDSC will offer opportunities to explain pathological characteristics of different diabetes. MDSC also will be used for personalized immunotherapy of diabetes.

scholarly journals Eugenol triggers CD11b+Gr1+myeloid-derived suppressor cell apoptosisviaendogenous apoptosis pathway

RSC Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 3833-3838 ◽  
Author(s):  
Ying Ding ◽  
Zecheng Yang ◽  
Wensheng Zhang ◽  
Yuwei Xu ◽  
Yuanyuan Wang ◽  
...  
Keyword(s):  
Molecular Mechanism ◽  
Suppressor Cells ◽  
Suppressor Cell ◽  
Myeloid Derived Suppressor Cells ◽  
Apoptosis Pathway ◽  
Myeloid Derived Suppressor Cell

To study the effect and underlying molecular mechanism of eugenol on CD11b+Gr1+myeloid-derived suppressor cells (MDSCs).

scholarly journals Myeloid-derived suppressor cell subsets drive glioblastoma growth in a sex-specific manner

2020 ◽  
Author(s):  
Defne Bayik ◽  
Yadi Zhou ◽  
Chihyun Park ◽  
Changjin Hong ◽  
Daniel Vail ◽  
...  
Keyword(s):  
Gene Expression ◽  
Suppressor Cells ◽  
Suppressor Cell ◽  
Gene Signature ◽  
Myeloid Derived Suppressor Cells ◽  
Myeloid Derived Suppressor Cell ◽  
Specific Manner ◽  
Therapeutic Opportunity ◽  
Clinical Models ◽  
Medicine Analysis

AbstractMyeloid-derived suppressor cells (MDSCs) that block anti-tumor immunity are elevated in glioblastoma (GBM) patients. However, the distinct contribution of monocytic (mMDSC) versus granulocytic (gMDSC) subsets has yet to be determined. We observed that mMDSCs were enriched in the male tumor microenvironment, while gMDSCs were elevated in the circulation of female GBM models. Depletion of peripheral gMDSCs extended the survival only in female mice. Using gene expression signatures coupled with network medicine analysis, we demonstrated in pre-clinical models that mMDSCs could be targeted with anti-proliferative agents in males, whereas gMDSC function in females could be inhibited by IL-1β blockade. Analysis of patient data confirmed that proliferating mMDSCs were the predominant population in male tumors, and that a high gMDSC/IL-1β gene signature correlated with poor prognosis of female patients. These findings demonstrate that MDSC subsets differentially drive immune suppression in a sex-specific manner and can be leveraged for therapeutic intervention in GBM.Statement of SignificanceSexual dimorphism at the level of MDSC subset prevalence, localization and gene expression profile comprises a therapeutic opportunity. Our results indicate that chemotherapy can be used to target mMDSC in males, while IL-1 pathway inhibitors can provide benefit to females through blockade of gMDSC function.

scholarly journals Myeloid-Derived Suppressor Cell Differentiation in Cancer: Transcriptional Regulators and Enhanceosome-Mediated Mechanisms

2021 ◽  
Vol 11 ◽  
Author(s):  
Norman Fultang ◽  
Xinyuan Li ◽  
Ting Li ◽  
Youhai H. Chen
Keyword(s):  
Gene Expression ◽  
Transcription Factors ◽  
Cell Differentiation ◽  
Suppressor Cells ◽  
Suppressor Cell ◽  
Transcriptional Regulators ◽  
Myeloid Derived Suppressor Cells ◽  
Myeloid Derived Suppressor Cell ◽  
Specific Manner ◽  
Severe Infections

Myeloid-derived Suppressor Cells (MDSCs) are a sub-population of leukocytes that are important for carcinogenesis and cancer immunotherapy. During carcinogenesis or severe infections, inflammatory mediators induce MDSCs via aberrant differentiation of myeloid precursors. Although several transcription factors, including C/EBPβ, STAT3, c-Rel, STAT5, and IRF8, have been reported to regulate MDSC differentiation, none of them are specifically expressed in MDSCs. How these lineage-non-specific transcription factors specify MDSC differentiation in a lineage-specific manner is unclear. The recent discovery of the c-Rel−C/EBPβ enhanceosome in MDSCs may help explain these context-dependent roles. In this review, we examine several transcriptional regulators of MDSC differentiation, and discuss the concept of non-modular regulation of MDSC signature gene expression by transcription factors such as c-Rel and C/EBPß.

scholarly journals High-dose dexamethasone corrects impaired myeloid-derived suppressor cell function via Ets1 in immune thrombocytopenia

Blood ◽  
2016 ◽  
Vol 127 (12) ◽  
pp. 1587-1597 ◽  
Author(s):  
Yu Hou ◽  
Qi Feng ◽  
Miao Xu ◽  
Guo-sheng Li ◽  
Xue-na Liu ◽  
...  
Keyword(s):  
Immune Thrombocytopenia ◽  
Cell Function ◽  
Suppressor Cells ◽  
Suppressor Cell ◽  
High Dose ◽  
Myeloid Derived Suppressor Cells ◽  
High Dose Dexamethasone ◽  
Myeloid Derived Suppressor Cell ◽  
Key Points ◽  
Therapeutic Mechanism

Key Points The impaired suppressive function of myeloid-derived suppressor cells plays a role in the pathogenesis of immune thrombocytopenia. The effect of dexamethasone in correcting dysfunction of myeloid-derived suppressor cells suggests a new therapeutic mechanism of high-dose dexamethasone in patients with immune thrombocytopenia.

Sign in / Sign up

Export Citation Format

Share Document