title: Local renin-angiotensin system regulates the differentiation of mesenchymal stem cells into insulin-producing cells through angiotensin type 2 receptor.
abstract: Differentiation of stem cells into insulin-producing cells (IPCs) suitable for therapeutic transplantation offers a desperately needed approach for the diabetic patients. Elucidation of the molecular mechanisms during the differentiation of mesenchymal stem cells (MSCs) into IPCs assists the successful production of IPCs and provides an important insight into the improvement of the role of MSCs as a therapeutic tool for diabetes mellitus (DM). The present study aimed to investigate the role of local renin-angiotensin system (RAS) on MSCs differentiation into IPCs by measuring the expression of local RAS in MSCs during the differentiation into IPCs and assessing the effect of angiotensin type 1 receptor (AT1R) blocker and angiotensin type 2 receptor (AT2R) blocker on the differentiation process. Our data showed that the differentiation of MSCs into IPCs was associated with an increase in cellular angiotensinogen, angiotensin-converting enzyme (ACE), renin, and AT2R expression and undetectable expression of AT1R. The net effect was an increase in cellular angiotensin II (Ang II) during the differentiation process. AT1R blockade allowed the differentiation of MSCs into IPCs, whereas AT2R blockade alone and blockade of both AT1R and AT2R inhibited the differentiation of MSCs into IPCs. Our data demonstrated an important role of local RAS in the regulation of MSCs differentiation into IPCs and that Ang II mainly orchestrates this role through AT2R activation.
authors.affiliation: Biochemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Einy St., Cairo, 11562, Egypt. Electronic address: nerminsadik@yahoo.com.
authors.forename: Nermin Abdel-Hamid
authors.initials: NA
authors.lastname: Sadik
authors.affiliation: Therapeutic Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, El-buhouth St., Dokki, Giza, 12622, Egypt. Electronic address: nadiametwally@yahoo.com.
authors.forename: Nadia Said
authors.initials: NS
authors.lastname: Metwally
authors.affiliation: Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Kasr El-Einy St., Cairo, Egypt. Electronic address: olfatshaker@yahoo.com.
authors.forename: Olfat Gamil
authors.initials: OG
authors.lastname: Shaker
authors.affiliation: Therapeutic Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, El-buhouth St., Dokki, Giza, 12622, Egypt. Electronic address: mmsanad2000@yahoo.com.
authors.forename: Mahmoud Sanad
authors.initials: MS
authors.lastname: Soliman
authors.affiliation: Department of Supplementary General Sciences, Future University, New Cairo, Cairo, Egypt. Electronic address: aabdelaziz83@yahoo.com.
authors.forename: Ahmed Abdelaziz
authors.initials: AA
authors.lastname: Mohamed
authors.affiliation: Therapeutic Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, El-buhouth St., Dokki, Giza, 12622, Egypt. Electronic address: mm.abdelmoaty@nrc.sci.eg.
authors.forename: Mai Mohamed
authors.initials: MM
authors.lastname: Abdelmoaty
mesh_terms: D000804:Angiotensin II / Q000378:metabolism; D000818:Animals; D002454:Cell Differentiation; D002478:Cells, Cultured; D007328:Insulin / Q000378:metabolism*; D050417:Insulin-Secreting Cells / Q000378:metabolism*; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000378:metabolism; D007703:Peptidyl-Dipeptidase A; D051381:Rats; D017207:Rats, Sprague-Dawley; D044140:Receptor, Angiotensin, Type 1 / Q000378:metabolism; D044139:Receptor, Angiotensin, Type 2 / Q000378:metabolism*; D012084:Renin-Angiotensin System / Q000502:physiology*
chemical_list: D007328:Insulin; D044140:Receptor, Angiotensin, Type 1; D044139:Receptor, Angiotensin, Type 2; D000804:Angiotensin II; D007703:Peptidyl-Dipeptidase A
keywords: Angiotensin type 1 receptor; Angiotensin type 2 receptor; Insulin-producing cells; Mesenchymal stem cells; Renin-angiotensin system