Expression of annexin-A1 in blood and tissue leukocytes of leprosy patients

Ribeiro, Afonso Bezerra; Caloi, Caroline Marques; Pimenta, Silvia Thais Sá; Seshayyan, Sudha; Govindarajulu, Srinivas; Souto, Francisco José Dutra; Damazo, Amílcar Sabino

doi:10.1590/0037-8682-0277-2020

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…Finally, to analyze a possible mechanism of action of MDSCs in patients with leprosy, the ANXA1 expression was analyzed. Previous studies have already demonstrated the ANXA1 expression in leukocytes of leprosy patients [37,38]. However, this is the rst study that highlights the presence of this protein in MDSCs.…”

Section: Discussionmentioning

confidence: 74%

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

Damazo

Silva

Cavalcante

et al. 2020

Preprint

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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.

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Section: Discussionmentioning

confidence: 74%

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

Damazo

Silva

Cavalcante

et al. 2020

Preprint

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“…Finally, to analyze a possible mechanism of action of MDSCs in patients with leprosy, the ANXA1 expression was analyzed. Previous studies have already demonstrated the ANXA1 expression in leukocytes of leprosy patients [ 31 , 32 ]. However, this is the first study that highlights the presence of this protein in MDSCs.…”

Section: Discussionmentioning

confidence: 99%

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

Silva

Cavalcante²,

Fonseca³

et al. 2021

BMC Infect Dis

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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.

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“…Its expression has been observed particularly in cells related to defense processes, such as neutrophils [31][32][33], mast cells [34][35][36], eosinophils [37,38], monocytes [39][40][41], and lymphocytes [8,42,43].…”

Section: Anxa1 and Inflammatory Processesmentioning

confidence: 99%

ANNEXIN A1: Roles in Placenta, Cell Survival, and Nucleus

Sousa

Santos

Teixeira

et al. 2022

Cells

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The unbiased approaches of the last decade have enabled the collection of new data on the biology of annexin A1 (ANXA1) in a variety of scientific aspects, creating opportunities for new biomarkers and/or therapeutic purposes. ANXA1 is found in the plasma membrane, cytoplasm, and nucleus, being described at low levels in the nuclear and cytoplasmic compartments of placental cells related to gestational diabetic diseases, and its translocation from the cytoplasm to the nucleus has been associated with a response to DNA damage. The approaches presented here open pathways for reflection upon, and intrinsic clarification of, the modulating action of this protein in the response to genetic material damage, as well as its level of expression and cellular localization. The objective of this study is to arouse interest, with an emphasis on the mechanisms of nuclear translocation of ANXA1, which remain underexplored and may be beneficial in new inflammatory therapies.

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Expression of annexin-A1 in blood and tissue leukocytes of leprosy patients

Cited by 5 publications

References 34 publications

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

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

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

ANNEXIN A1: Roles in Placenta, Cell Survival, and Nucleus

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