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Correlation of Differentially Expressed lncRNAs with Intestinal Flora Imbalance, Small Intestinal Permeability, and Glucose Uptake in T2DM Mice

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Abstract

Diabetes is a major global health concern. This study aimed to investigate the correlation between differentially expressed lncRNAs in mice with type 2 diabetes mellitus (T2DM) and alterations in the intestinal flora and intestinal pathology. A T2DM mouse model was constructed by feeding mice a high-fat diet. Serum fat metabolism-related indices and insulin levels were biochemically detected. Serum inflammatory factors (IL-1β, IL-6, TNF-α, IL-10) and endotoxin (LPS) were measured by ELISA. Histopathological changes in the small intestines of mice were observed by HE. The short-chain fatty acid (SCFA) content was analyzed using GC-MS. Analysis of altered intestinal flora in T2DM mice was performed using a 16sRNA sequencing assay. Differences in lncRNA expression profiles in small intestinal tissues were analyzed using RNA-seq assays. Spearman’s correlation analysis was used to correlate the expression of candidate lncRNAs with changes in differential gut flora. Spearman’s correlation analysis was used to analyze the correlation between the expression of candidate differentially expressed lncRNAs, small intestinal permeability, and glucose absorption. We found that serum levels of LPS, BUN, Scr, TC, TG, LDL-C, IL-1β, IL-6, and TNF-α were elevated and levels of HDL-C, insulin, and IL-10 were decreased in T2DM mice. The ileal enterochromes of T2DM mice were disorganized and broken, the number of enterochromes was reduced, the local epithelial cells were necrotic, and the plasma membrane layer was locally absent. In addition, the protein expression of ZO-1 and occludin was decreased, and the protein expression of SGLT-1 and GLUT-2 was elevated in the model group compared to the control group. The levels of Acetic acid, Propionic acid and Butyric acid were decreased and the levels of Isobutyric acid and Isovaleric acid were increased, the abundance of beneficial bacteria was decreased and the abundance of harmful bacteria was increased in the feces of T2DM mice. RNA-seq identified nine differentially expressed lncRNAs (LINC00675, Gm33838, Gm11655, LOC6613926, LOC6613788, LOC6613791, LOC6613795, Arhgap27os3, and A330023F24Rik). In addition, we found significant correlations between differentially expressed lncRNAs and a variety of intestinal flora, as well as between small intestinal permeability and glucose absorption. A significant correlation was observed between differentially expressed lncRNAs in the intestinal tissues of T2DM mice and intestinal flora imbalance, small intestinal permeability, and glucose absorption.

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Funding

This project was supported by the Natural Science Foundation of China (grant no. 81500427) and the Angel Nutritech Nutrition Fund (AF2017002).

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Author notes

  1. Shufang Xu, Heng Zhang, and Hui Zou contributed equally to this work.

Authors and Affiliations

  1. Key Laboratory for Molecular Diagnosis of Hubei, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

    Shufang Xu & Hui Zou

  2. Department of Clinical Nutrition, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430014, Hubei, China

    Shufang Xu & Mengjun Huang

  3. Department of Gastroenterology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

    Heng Zhang, Zhitao Chen & Ting Jiang

  4. Department of Orthopedic Surgery, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

    Hui Zou

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  1. Shufang Xu
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Contributions

Shufang-Xu prepared the manuscript and provided the experimental guidance. Guidance on writing experimental research papers was provided by Heng-Zhang and Hui-Zou. The experimental research and data collection were conducted by Zhitao-Chen, Ting-Jiang, and Mengjun-Huang.

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Correspondence to Shufang Xu.

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The experiment was approved by the Animal Ethics Committee of Wuhan Myhalic Biotechnology Co., Ltd (HLK-20210621-001).

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Xu, S., Zhang, H., Zou, H. et al. Correlation of Differentially Expressed lncRNAs with Intestinal Flora Imbalance, Small Intestinal Permeability, and Glucose Uptake in T2DM Mice. Appl Biochem Biotechnol (2024). https://doi.org/10.1007/s12010-024-04935-1

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