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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Angiotensin II Regulates Proliferation and Function of Stem Cells of Apical Papilla

Full text
Author(s):
Pizzatto, Lais Nicolay [1] ; Meneses, Claudia C. B. [1] ; Diniz, Elisa A. [1] ; Dionisio, Thiago J. [2] ; Santos, Carlos Ferreira [2] ; Sipert, Carla R. [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Sch Dent, Dept Restorat Dent, Bauru, SP - Brazil
[2] Univ Sao Paulo, Dent Sch Bauru, Dept Biol Sci, Bauru, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF ENDODONTICS; v. 46, n. 6, p. 810-817, JUN 2020.
Web of Science Citations: 0
Abstract

Introduction: Stem cells of apical papilla (SCAP) may be affected by inflammatory mediators released by activation with lipopolysaccharide (LPS) from infected pulpal cavities of necrotic immature teeth. Therefore, this study aimed to investigate the presence of a local reninangiotensin system (RAS) and the role of angiotensin II (Ang II) on the modulation of SCAP in vitro. Methods: Primary cultures of SCAP were incubated with LPS (0.1-10 mg/mL) for cell viability and quantification of the chemokine CCL2. Components of RAS were searched by gene expression of angiotensinogen (AGTN), angiotensin converting enzyme (ACE), renin, angiotensin receptor 1 (AT1) and 2 (AT2), and Mas receptor. Ang II was investigated in SCAP supernatants. Immunofluorescence was used to detect AGTN and AT1. Next, cells were treated with Ang II for viability/proliferation assessment, quantification of CCL2 and interleukin 6, and mineralization assay. Data were evaluated by analysis of variance using Tukey post hoc comparisons or the Student t test. P values,.05 were considered to be significant. Results: LPS increased CCL2 production at 1 and 10 mg/mL. The gene expression of AGTN, renin, ACE, and AT1 was detected, but only ACE was increased by LPS. Ang II peptide was found in SCAP supernatants but unaltered by LPS. Both AGTN and AT1 proteins were detected by immunostaining. Ang II significantly induced SCAP proliferation, increased CCL2 production, down-regulated IL-6 release, and reduced the SCAP mineralization rate. Conclusions: A local RAS was found at the apical papilla, and Ang II was able to modulate SCAP function in vitro. (AU)

FAPESP's process: 17/01737-8 - Role of endocanabinoids on the modulation of human apical papilla cells in vitro
Grantee:Claudia Caroline Bosio Meneses
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/16473-3 - Study of the role of angiotensin II on in vitro differentiation of human apical papilla cells
Grantee:Laís Nicolay Pizzatto
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 16/13944-5 - Role of inflammatory mediators on the modulation of Cells from Apical Papilla: in vitro study
Grantee:Carla Renata Sipert
Support Opportunities: Regular Research Grants
FAPESP's process: 15/03965-2 - Role of the renin-angiotensin system in different oral inflammatory models: an experimental interdisciplinary and clinical approach
Grantee:Carlos Ferreira dos Santos
Support Opportunities: Research Projects - Thematic Grants