Influence of high glucose on mesangial cell-derived exosome composition, secretion and cell communication

Author(s)

Novaes, Antonio da Silva ^[1] ; Borges, Fernanda Teixeira ^[1] ; Maquigussa, Edgar ^[1] ; Varela, Vanessa Araujo ^[1] ; Salles Dias, Marcos Vinicios ^[2] ; Boim, Mirian Aparecida ^[1]

Affiliation

^[1] Univ Fed Sao Paulo, Dept Med, Renal Div, Sao Paulo - Brazil

^[2] AC Camargo Canc Ctr, Int Res Ctr, Sao Paulo - Brazil

• Document type: Journal article
• Source: SCIENTIFIC REPORTS; v. 9, APR 18 2019.
• Web of Science Citations: 3

Abstract

Mesangial cells stimulated with high glucose (HG) exhibit increased intracellular angiotensin II (AngII) synthesis that is correlated with the upregulation of AngII target genes, such as profibrotic cytokines. The intracrine effects of AngII can be mediated by several molecules transferred to other cells via exosomes (Exos), which play a key role in cellular communication under many physiological and pathological conditions. The aim of this study was to investigate the effects of exosomes derived from HG-stimulated human mesangial cells (HG-HMCs) on normal unstimulated HMCs. Exosomes from HMCs (C-Exos) and HG-HMCs (HG-Exos) were obtained from cell culture supernatants. HMCs were incubated with C-Exos or HG-Exos. HG stimulus induced a change in the amount but not the size of Exos. Both C-Exos and HG-Exos contained angiotensinogen and renin, but no angiotensin converting enzyme was detected. Compared with HMCs treated with C-Exos, HMCs treated with HG-Exos presented higher levels of fibronectin, angiotensinogen, renin, AT(1) and AT(2) receptors, indicating that HG-Exos modified the function of normal HMCs. These results suggest that the intercellular communication through Exos may have pathophysiological implications in the diabetic kidney. (AU)

• FAPESP's process: 15/23345-9 - MicroRNAs, extracellular vesicles and stem cells: physiology, pathophysiological role and therapeutic potential in renal diseases
• Grantee: Mirian Aparecida Boim
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/00250-8 - Characterization of microvesicles and mesangial cells derived-exosomes stimulated by glucose and evaluation of their possible role in cell communication
• Grantee: Antônio da Silva Novaes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral