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

• Published in: Scientific reports Vol. 9; no. 1; p. 6270
• Main Authors: da Silva Novaes, Antônio, Borges, Fernanda Teixeira, Maquigussa, Edgar, Varela, Vanessa Araújo, Dias, Marcos Vinicios Salles, Boim, Mirian Aparecida
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 18-04-2019; Nature Publishing Group
• Subjects: 101/28; 14; 14/19; 14/34; 59; 631/337; 631/80/304; 64; 692/4022/1585/2759/1419; 82; 82/1; 82/80; 96; 96/35; Angiotensin; Angiotensin II; Angiotensin II - genetics; Angiotensinogen; Cell Communication - genetics; Cell culture; Cell interactions; Cell signaling; Communication; Cytokines; Diabetes mellitus; Diabetic Nephropathies - genetics; Diabetic Nephropathies - metabolism; Diabetic Nephropathies - pathology; Exosomes; Exosomes - genetics; Exosomes - pathology; Fibronectin; Fibronectins - genetics; Gene Expression Regulation - genetics; Glomerular Mesangium - metabolism; Glucose - metabolism; Humanities and Social Sciences; Humans; Intracellular signalling; Kidney - metabolism; Kidney - pathology; Mesangial cells; Mesangial Cells - metabolism; multidisciplinary; Peptidyl-dipeptidase A; Peptidyl-Dipeptidase A - genetics; Receptor mechanisms; Receptor, Angiotensin, Type 1 - genetics; Receptor, Angiotensin, Type 2 - genetics; Renin; Renin - genetics; Science; Science (multidisciplinary)
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-019-42746-1

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.