Activation of Human Neutrophils by the Anti-Inflammatory Mediator Esenbeckia leiocarpa Leads to Atypical Apoptosis
Joint Authors
Pizzolatti, Moacir Geraldo
de Liz, Rafael
Horst, Heros
Girard, Denis
Fröde, Tania Silvia
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-08
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Despite the fact that Esenbeckia leiocarpa, a Brazilian plant, possesses potential anti-inflammatory properties, its effect in neutrophils, key players in inflammation, has never been investigated.
In this study, a crude hydroalcoholic extract (CHE) was used to evaluate the potential toxic or agonistic effect of E.
leiocarpa in human neutrophils.
At a noncytotoxic concentration of 500 μg/mL, CHE increased actin polymerization and cell signaling events, especially p38 MAPK.
Its modulatory activity on neutrophil cell apoptosis was investigated by cytology and by flow cytometry and, although CHE increased the apoptotic rate (by cytology) and increased annexin-V binding, it did not, unexpectedly, increase CD16 shedding.
CHE increased the degradation of the cytoskeletal proteins gelsolin and paxillin but, surprisingly, not of vimentin.
The proapoptotic activity of CHE was reversed by a pan-caspase inhibitor but not by a p38 inhibitor.
We conclude that CHE is a novel human neutrophil agonist that induces apoptosis by a caspase-dependent and p38-independent mechanism in an atypical fashion based on its lack of effect on CD16 shedding and vimentin degradation.
Since the resolution of inflammation occurs by elimination of apoptotic neutrophils, the ability of CHE to induce neutrophil apoptosis correlates well with its anti-inflammatory properties, as previously reported.
American Psychological Association (APA)
de Liz, Rafael& Horst, Heros& Pizzolatti, Moacir Geraldo& Fröde, Tania Silvia& Girard, Denis. 2012. Activation of Human Neutrophils by the Anti-Inflammatory Mediator Esenbeckia leiocarpa Leads to Atypical Apoptosis. Mediators of Inflammation،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-998849
Modern Language Association (MLA)
de Liz, Rafael…[et al.]. Activation of Human Neutrophils by the Anti-Inflammatory Mediator Esenbeckia leiocarpa Leads to Atypical Apoptosis. Mediators of Inflammation No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-998849
American Medical Association (AMA)
de Liz, Rafael& Horst, Heros& Pizzolatti, Moacir Geraldo& Fröde, Tania Silvia& Girard, Denis. Activation of Human Neutrophils by the Anti-Inflammatory Mediator Esenbeckia leiocarpa Leads to Atypical Apoptosis. Mediators of Inflammation. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-998849
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-998849