Diet-induced Prediabetes: Effects on the Activity of the Renin-angiotensin-aldosterone System in Selected Organs

Overview

Journal J Diabetes Investig

Specialty Endocrinology

Date 2021 Oct 7

PMID 34619025

Citations 14

Authors

Bongeka Cassandra Mkhize

Palesa Mosili

Phikelelani Sethu Ngubane

Ntethelelo Hopewell Sibiya

Andile Khathi

Affiliations

Soon will be listed here.

Abstract

Aims/introduction: Derangements often observed with type 2 diabetes are associated with disturbances in renin-angiotensin-aldosterone system (RAAS) activity. A positive correlation between local RAAS activity and the complications observed in type 2 diabetes has been noted. However, the detrimental ramifications due to moderate hyperglycemia noted in prediabetes, and the affected organ system and mechanistic pathways are not elucidated. Hence, this study investigated the effects of diet-induced prediabetes on RAAS in various organs.

Materials And Methods: Male Sprague-Dawley rats were separated into two groups: (i) non-prediabetes through exposure to standard rat chow group; and (ii) diet-induced prediabetes group by exposure to a high-fat high-carbohydrate diet for 32 weeks. RAAS activity in the skeletal muscle, adipose tissue, liver, pancreas and heart was determined through the analysis of RAAS components, such as renin, angiotensinogen, angiotensin-converting enzyme and angiotensin II type 1 receptor through polymerase chain reaction, as well as the quantification of angiotensin II and aldosterone concentration. Furthermore, nicotinamide adenine dinucleotide phosphate oxidase, superoxide dismutase and glutathione peroxidase 1 concentrations were determined in the skeletal muscle, pancreas and heart, in addition to the hepatic triglycerides.

Results: The RAAS components were elevated in the diet-induced prediabetes group when compared with the non-prediabetes group. This was further accompanied by increased nicotinamide adenine dinucleotide phosphate oxidase and reduced superoxide dismutase and glutathione peroxidase 1 concentrations in the selected organs, in addition to the elevated hepatic triglycerides concentration in the diet-induced prediabetes by comparison to non-prediabetes group.

Conclusions: Due to these observed changes, we suggest that local RAAS activity in the prediabetes state in selected organs elicits the derangements noted in type 2 diabetes.

Citing Articles

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