Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Secretion pattern of canine amniotic stem cells derived extracellular vesicles

Full text
Author(s):
Rafael Garcia Karam [1] ; Lina Castelo Branco Motta [2] ; Matheus Ferreira de Almeida [3] ; Alessandra Bridi [4] ; Juliano Coelho da Silveira [5] ; Carlos Eduardo Ambrósio [6]
Total Authors: 6
Affiliation:
[1] Universidade de São Paulo. Faculdade de Zootecnia e Engenharia de Alimentos. Departamento de Cirurgia - Brasil
[2] Universidade de São Paulo. Faculdade de Zootecnia e Engenharia de Alimentos. Departamento de Cirurgia - Brasil
[3] Universidade de São Paulo. Faculdade de Zootecnia e Engenharia de Alimentos. Departamento de Medicina Veterinária - Brasil
[4] Universidade de São Paulo. Faculdade de Zootecnia e Engenharia de Alimentos. Departamento de Medicina Veterinária - Brasil
[5] Universidade de São Paulo. Faculdade de Zootecnia e Engenharia de Alimentos. Departamento de Medicina Veterinária - Brasil
[6] Universidade de São Paulo. Faculdade de Zootecnia e Engenharia de Alimentos. Departamento de Medicina Veterinária - Brasil
Total Affiliations: 6
Document type: Journal article
Source: Animal Reproduction; v. 19, n. 4 2022-11-14.
Abstract

Abstract Extracellular vesicles (EVs) derived from stem cells (SCs) have regenerative potential and the possibility of being used in treating chronic diseases. EVs present lower risk of tumorigenicity and easily to isolation and storage. Therefore, this research aims to compare the morphological characteristics of the EVs (up to 150nm) derived from stem cells obtained from canine amniotic membranes in different passages during the in vitro culture. For this, cells from the amniotic membranes were isolated, cultured, and characterized. In order to answer our aim, the number of cells was normalized at each passage to generate conditioned media for EVs separation. The cells were differentiated into adipogenic, chondrogenic, and osteogenic tissue, to characterize these cells as mesenchymal stem cells (MSC). Moreover, flow cytometry analysis was performed and showed that the MSC were positive for CD90, CD105 and negative for CD34, CD45, mesenchymal and hematopoietic markers, respectively. For EVs analysis, MSC in different passages (P0-P2) were culture until 80% of confluence, then the medium was replaced by EVs depleted medium. After 48h, culture medium was collected and centrifuged to separate EVs, followed by nanoparticle tracking analysis. The EVs were also characterized by western blot and transmission electron microscopy (TEM). EVs were positive for Alix and negative for Cytochrome C as well as presented the traditional cup-shape by transmission electronic microscopy. Our results demonstrated that the concentration in the different passages was increased in P0 compared to P1 and P2 (p<0.05). No differences were found in EVs size (P0=132nm, P1=130nm and P2=120nm). Together, these results demonstrate that P0 of MSC is enriched of EVs when compared to later passages, suggesting that this passage would be the best to be applied in pre-clinical tests. Despite that, more studies are necessary to identify the EVs content and how the cells will respond to treatment with them. (AU)

FAPESP's process: 17/21266-0 - Amniotic Progenitor cells and therapeutics potention
Grantee:Carlos Eduardo Ambrósio
Support Opportunities: Regular Research Grants
FAPESP's process: 13/08135-2 - CTC - Center for Cell-Based Therapy
Grantee:Dimas Tadeu Covas
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC