Dietary Nitrate Maintains Homeostasis of Oxidative Stress and Gut Microbiota to Promote Flap Survival in Type 2 Diabetes Mellitus Rats

Overview

Journal BMC Endocr Disord

Publisher Biomed Central

Specialty Endocrinology

Date 2024 Sep 10

PMID 39256735

Authors

Qifang Niu

Delong Li

Wenwen Guo

Zhien Feng

Zhengxue Han

Yang Yang

Affiliations

Soon will be listed here.

Abstract

Background: Random-pattern skin flaps are commonly used to repair skin tissue defects in surgical tissue reconstruction. However, flap necrosis in the distal area due to ischemia injury is still challenging for its applications in plastic surgery. The complications of diabetes will further increase the risk of infection and necrosis.

Methods: This study induced type 2 diabetes mellitus (T2DM) rats with a high-fat diet and STZ. The survival rate of the skin flap was observed by adding inorganic sodium nitrate to drinking water. Histology and immunohistochemistry were used to detect the damage to the skin flap. The nitrate content was measured by total nitric oxide and nitrate/nitrite parameter assay. Dihydroethidium and malondialdehyde (MDA) assays were used to value oxidative stress. Rat colon feces were collected for 16s rRNA gene sequence.

Results: Our studies showed that nitrate administration leads to anti-obesity and anti-diabetic effects. Nitrate directly increased the survival area of skin flaps in diabetic rats and mean blood vessel density by enhancing angiogenesis, inhibiting apoptosis, and reducing oxidative stress. The 16s rRNA sequence revealed that nitrate may regulate the homeostasis of the gut microbiota and re-store energy metabolism.

Conclusion: Dietary nitrate has been shown to maintain the homeostasis of oxidative stress and gut microbiota to promote flap survival in rats with T2DM.

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