Title:Oral Angiotensin-(1-7) Peptide Modulates Intestinal Microbiota Improving Metabolic Profile in Obese Mice
Volume: 28
Issue: 10
Author(s): Amanda Machado, Janaína Ribeiro Oliveira, Deborah de F. Lelis, Victor Hugo D. Guimarães, Alfredo M.B. de Paula, Andre L.S. Guimarães, Igor V. Brandi, Bruna Mara A. de Carvalho, Diego Vicente da Costa, Cláudia Regina Vieira, Ulisses Alves Pereira, Theles de Oliveira Costa, João M.O. Andrade, Robson Augusto Souza Santos and Sérgio H.S. Santos*
Affiliation:
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Universidade Estadual de Montes Claros (UNIMONTES), Montes Claros, Minas Gerais,Brazil
Keywords:
Gut microbiota, metabolism, renin-angiotensin system, metabolic endotoxemia, small intestine, ACE2.
Abstract:
Background: Obesity is a serious health problem that dysregulate Renin-Angiotensin
System (RAS) and intestinal microbiota.
Objective: The present study aimed to evaluate the Angiotensin-(1-7) [ANG-(1-7)] oral formulation
effects on obese mice intestinal microbiota.
Methods: Mice were divided into four groups: obese and non-obese treated with ANG-(1-7) and
obese and non-obese without ANG-(1-7) during four weeks.
Results: We observed a significant decrease in the fasting plasma glucose, total cholesterol, triglycerides,
and Low-density lipoprotein levels and increased High-density lipoprotein in animals treated
with ANG-(1-7). The histological analysis showed intestinal villi height reduction in mice treated
with ANG-(1-7). Additionally, increased Bacteroidetes and decreased Firmicutes (increased Bacteroidetes/
Firmicutes ratio) and Enterobacter cloacae populations were observed in the High-Fat Diet
+ ANG-(1-7) group. Receptor toll-like 4 (TLR4) intestinal mRNA expression was reduced in the
HFD+ANG-(1-7) group. Finally, the intestinal expression of the neutral amino acid transporter
(B0AT1) was increased in animals treated with ANG-(1-7), indicating a possible mechanism associated
with tryptophan uptake.
Conclusion: The results of the present study suggest for the first time an interaction between oral
ANG-(1-7) and intestinal microbiota modulation.