Effect and Mechanism of Jujube on Food Intake and Intestinal Inflammatory Injury in Type 2 Diabetic Rats

LI Annuo; ZHU Yu; YUE Rensong

doi:10.13386/j.issn1002-0306.2023030333

Volume 45 Issue 19

Sep. 2024

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Science and Technology of Food Industry > 2024 > 45(19): 307-315. > DOI: 10.13386/j.issn1002-0306.2023030333

LI Annuo, ZHU Yu, YUE Rensong. Effect and Mechanism of Jujube on Food Intake and Intestinal Inflammatory Injury in Type 2 Diabetic Rats[J]. Science and Technology of Food Industry, 2024, 45(19): 307−315. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2023030333.

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Effect and Mechanism of Jujube on Food Intake and Intestinal Inflammatory Injury in Type 2 Diabetic Rats

Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China

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Received Date: March 29, 2023
Available Online: July 31, 2024

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Abstract

Objective: To investigate the effects and underlying mechanisms of jujube on feeding behavior and intestinal inflammatory injury in rats with type 2 diabetes mellitus (T2DM). Methods: SD rats were randomly assigned to four groups: a blank control group, a T2DM model group, a low-dose jujube group (1.575 g/kg), and a high-dose jujube group (9.45 g/kg). Apart from the blank group, rats in the remaining groups were subjected to a high-fat, high-sugar diet combined with streptozotocin (STZ) administration to induce the T2DM model. Following successful model establishment, rats in the jujube groups received daily gavage with different concentrations of jujube solution for 4 consecutive weeks. General conditions, food intake, and blood glucose levels were monitored and recorded. Additionally, serum levels of inflammatory factors including interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), glucagon-like peptide-1 (GLP-1), and peptide YY (PYY) were assayed. Histopathological analysis of the ileum was performed to assess tissue damage and cell apoptosis, and the expressions of inflammation- and apoptosis-related genes such as nuclear factor NF-κB p65 (NF-κB p65) and cysteine-aspartic acid protease-3 (Caspase3), as well as related proteins including Toll-like receptor 4 (TLR4), NF-κB p65, phosphorylated NF-κB p65 (p-NF-κB p65), BCL2-associated X protein (Bax), B-cell lymphoma-2 (Bcl-2), Pro Caspase3, and Cleaved Caspase3 were measured in the intestinal tissue. Results: Compared with the model group, the rats in the administration group exhibited a highly significant reduction in food intake (P<0.01). Serum levels of TNF-α and IL-1β were significantly decreased (P<0.01), while GLP-1 levels were markedly elevated (P<0.01). Notably, PYY levels showed a highly significant increase in the high-dose jujube group (P<0.01). Additionally, the inflammatory injury in ileal tissue improved, with a significant reduction in the apoptosis rate of ileal cells in the high-dose jujube group (P<0.01). Furthermore, the expression levels of intestinal NF-κB p65, Caspase3 mRNA, as well as NF-κB p65 and Cleaved Caspase3 proteins were significantly downregulated in the administration group (P<0.05, P<0.01). Additionally, the high-dose jujube group exhibited significant downregulation of p-NF-κB p65, Pro Caspase3, and the Bax/Bcl-2 protein ratio (P<0.05, P<0.01). Conclusion: Jujube has the potential to elevate intestinal anorexigenic hormones GLP-1 and PYY, thereby reducing food intake in T2DM rats. This effect may be mediated through jujube's ability to alleviate intestinal inflammation, repair intestinal damage, and restore intestinal hormone secretion in T2DM rats.
- jujube,
- type 2 diabetes,
- appetite,
- intestine,
- inflammation,
- apoptosis

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