» Articles » PMID: 37434936

Effects of Aqueous Saffron Extract on Glucoregulation As Well As Hepatic Agt and TNF-α Gene Expression in Rats Subjected to Sub-Chronic Stress

Overview
Journal Adv Biomed Res
Date 2023 Jul 12
PMID 37434936
Authors
Affiliations
Soon will be listed here.
Abstract

Background: Stress and saffron seem to affect glucoregulation mechanisms and insulin resistance in different ways. Impacts of the aqueous saffron extract were investigated on serum glucose levels, serum insulin levels, the homeostatic model assessment of β-cell function (HOMA-B), the homeostatic model assessment of insulin resistance (HOMA-IR), adrenal weight, and hepatic gene expression of angiotensinogen (Agt) and tumor necrosis factor-α (TNF-α) in rats under sub-chronic stress.

Materials And Methods: Forty-two male rats were divided into six groups: control, restraint stress (6h/day for seven days), saffron (30 and 60 mg/kg) treatments for seven days, and post-stress saffron (30 and 60 mg/kg) treatments for seven days. The serum glucose and insulin levels, hepatic gene expressions of Agt and TNF-α, HOMA-IR, HOMA-B, and adrenal gland weight were measured.

Results: One-week recovery following sub-chronic stress led to non-significant hyperglycemia, hyperinsulinemia, and insulin resistance. The hepatic Agt and TNF-α mRNA levels increased significantly in this group. Saffron administration led to enhanced hepatic Agt mRNA in the non-stressed subjects. In addition, serum glucose levels, insulin resistance, and hepatic Agt gene expression significantly increased in stress-saffron groups. The hepatic TNF-α gene expression was reduced only in the stress-saffron 60 group.

Conclusion: Saffron treatment after sub-chronic stress not only did not improve glucose tolerance but also enhanced insulin resistance. It indicated the interaction of saffron and sub-chronic stress to promote renin-angiotensin system activity. In addition, the saffron treatment decreased TNF-α gene expression after sub-chronic stress. The synergistic stimulating effect of saffron and sub-chronic stress on gene expression of hepatic Agt led to insulin resistance and hyperglycemia.

References
1.
Vargas Vargas R, Varela Millan J, Fajardo Bonilla E . Renin-angiotensin system: Basic and clinical aspects-A general perspective. Endocrinol Diabetes Nutr. 2021; 69(1):52-62. PMC: 8547789. DOI: 10.1016/j.endinu.2021.05.012. View

2.
Wang Q, Yu K, Wang J, Lin H, Wu Y, Wang W . Predator stress-induced persistent emotional arousal is associated with alterations of plasma corticosterone and hippocampal steroid receptors in rat. Behav Brain Res. 2012; 230(1):167-74. DOI: 10.1016/j.bbr.2012.01.051. View

3.
Bandegi A, Rashidy-Pour A, Vafaei A, Ghadrdoost B . Protective Effects of Crocus Sativus L. Extract and Crocin against Chronic-Stress Induced Oxidative Damage of Brain, Liver and Kidneys in Rats. Adv Pharm Bull. 2015; 4(Suppl 2):493-9. PMC: 4312396. DOI: 10.5681/apb.2014.073. View

4.
Satou R, Penrose H, Navar L . Inflammation as a Regulator of the Renin-Angiotensin System and Blood Pressure. Curr Hypertens Rep. 2018; 20(12):100. PMC: 6203444. DOI: 10.1007/s11906-018-0900-0. View

5.
Lovelock D, Deak T . Repeated exposure to two stressors in sequence demonstrates that corticosterone and paraventricular nucleus of the hypothalamus interleukin-1β responses habituate independently. J Neuroendocrinol. 2017; 29(9). PMC: 5617797. DOI: 10.1111/jne.12514. View