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1.内蒙古科技大学包头医学院第一附属医院腹部微创手术中心/日间手术中心,包头 014010
2.内蒙古科技大学包头医学院第一附属医院内分泌科,包头 014010
郭忠昊,Email: 1789757902@qq.com, ORCID: 0009-0004-0945-7717
王玮,博士,主任医师,Email: vvhappy521@163.com, ORCID: 0000-0001-6607-6137
李瑞斌,副主任医师,Email: 15849472388@163.com, ORCID: 0000-0002-5180-694X
收稿:2025-10-11,
纸质出版:2026-02-28
郭忠昊, 赵圣捷, 王玮, 李瑞斌. 减重手术对肥胖小鼠糖脂代谢的影响:基于转录组学与LC-MS非靶向代谢组学的分析[J]. 中南大学学报(医学版), 2026, 51(2): 228-239.
GUO Zhonghao, ZHAO Shengjie, WANG Wei, LI Ruibin. Effects of bariatric surgery on glucose and lipid metabolism in obese mice: An integrated transcriptomic and LC-MS-based untargeted metabolomics analysis[J]. Journal of Central South University. Medical Science, 2026, 51(2): 228-239.
郭忠昊, 赵圣捷, 王玮, 李瑞斌. 减重手术对肥胖小鼠糖脂代谢的影响:基于转录组学与LC-MS非靶向代谢组学的分析[J]. 中南大学学报(医学版), 2026, 51(2): 228-239. DOI:10.11817/j.issn.1672-7347.2026.250564.
GUO Zhonghao, ZHAO Shengjie, WANG Wei, LI Ruibin. Effects of bariatric surgery on glucose and lipid metabolism in obese mice: An integrated transcriptomic and LC-MS-based untargeted metabolomics analysis[J]. Journal of Central South University. Medical Science, 2026, 51(2): 228-239. DOI:10.11817/j.issn.1672-7347.2026.250564.
目的
2
肥胖及其并发的糖脂代谢紊乱,其健康危害日益突出。减重手术是目前治疗重度肥胖及其代谢合并症的有效手段。本研究旨在探究减重手术对高脂饮食(high-fat diet,HFD)诱导的肥胖小鼠糖脂代谢的影响。
方法
2
构建肥胖小鼠模型。将4周龄雄性C57BL/6J小鼠(
n
=32)分为对照(control,CTL)组(
n
=8)、HFD组(
n
=24)。在小鼠20周龄时,将HFD组进一步分为3个亚组,每组8只:HFD-HFD组(不做特殊干预)、HFD-SHAM组(进行假手术)、HFD-袖状胃切除术(sleeve gastrectomy,SG)组(进行SG)。每周记录小鼠的体重和摄食量;分别在20周龄(术前)和24周龄(术后4周)对小鼠进行腹腔葡萄糖耐量试验(intraperitoneal glucose tolerance test,IPGTT)及腹腔胰岛素耐量试验(intraperitoneal insulin tolerance test,IPITT);在24周龄时,采集禁食小鼠血液样本和米色、白色及棕色脂肪组织。血液样本用于测定血清中游离脂肪酸(free fatty acid,FFA)、总胆固醇(total cholesterol,TC)、甘油三酯(triglyceride,TG)及胰岛素水平。脂肪组织用于HFD-SHAM与HFD-SG组间差异表达基因和差异代谢物的筛选。对差异表达基因进行基因本体论(Gene Ontology,GO)功能富集分析和京都基因和基因组数据库(Kyoto Encyclopedia of Genes and Genomes,KEGG)通路富集分析,对差异代谢物进行通路富集分析,并整合转录组与代谢组数据,分析相关联通路及相关基因的表达特征。
结果
2
在术后4周,相较于HFD-HFD组和HFD-SHAM组,HFD-SG组的体重及摄食量显著降低(均
P
<
0.05);葡萄糖耐量及胰岛素耐量显著改善(均
P
<
0.05);胰岛素、FFA、TC、TG水平均显著降低(均
P
<
0.05)。在脂肪组织转录组学分析中,HFD-SG组与HFD-SHAM组共鉴定出763个差异表达基因,其中384个上调、379个下调。GO及KEGG富集分析显示类固醇激素生物合成等通路被激活。代谢组学分析进一步筛选出16个差异代谢物,富集分析涉及抗坏血酸与醛糖二酸代谢、叶酸介导
的一碳代谢等通路。整合转录组与代谢组数据发现,类固醇激素生物合成及叶酸介导的一碳代谢通路HFD-SG组与HFD-SHAM组间存在关联。在类固醇生物合成通路中,
LSS
、
Nsdhl
、
DHCR24
、
Hsd17b7
、
MSMO1
、
SQLE
、
CYP51
等7个基因在HFD-SG组的3种脂肪组织中均呈上调趋势,而在HFD-SHAM组呈下调趋势;代谢物5-雄烯二醇在HFD-SG组中下调,与基因表达趋势相反。在叶酸介导的一碳代谢通路中,
Aldh1l2
、
GNMT
仅在HFD-SHAM组米色脂肪组织中上调,而
TYMS
、
Sardh
在HFD-SG组米色及白色脂肪组织中上调;代谢物脱氧胸苷-5’-单磷酸在HFD-SG组上调,与基因表达趋势一致。
结论
2
减重手术可显著降低HFD诱导的肥胖模型小鼠的体重与摄食量,改善其葡萄糖耐量和胰岛素耐量,纠正其紊乱的血脂代谢。手术可调节脂肪组织中类固醇生物合成及叶酸介导的一碳代谢通路,改变关键基因与代谢物的表达特征。减重手术通过重塑脂肪组织代谢相关通路系统性改善糖脂代谢,本研究为肥胖及相关代谢性疾病的治疗提供了新的分子依据。
Objective
2
Obesity and its associated disorders of glucose and lipid metabolism have become increasingly significant public health concerns. Bariatric surgery is an effective intervention for severe obesity and related metabolic comorbidities. This study aims to investigate the effects of bariatric surgery on glucose and lipid metabolism in high-fat diet (HFD)-induced obese mice.
Methods
2
An obesity mouse model was established. Four-week-old male C57BL/6J mice (
n
=32) were randomly divided into a control (CTL) group (
n
=8) and an HFD group (
n
=24). At 20 weeks of age
HFD mice were further divided into 3 subgroups (
n
=8 per group): a HFD-HFD group
a sham-operated group (HFD-SHAM group)
and an HFD-sleeve gastrectomy (SG) group. Body weight and food intake were recorded weekly. Intraperitoneal glucose tolerance tests (IPGTT) and intraperitoneal insulin tolerance tests (IPITT) were performed at 20 weeks (preoperatively) and 24 weeks (4 weeks postoperatively). At 24 weeks
fasting blood samples and beige
white
and brown adipose tissues were collected. Serum levels of free fatty acids (FFA)
total cholesterol (TC)
triglycerides (TG)
and insulin wer
e measured. Transcriptomic and metabolomic analyses were conducted to identify differentially expressed genes (DEGs) and differential metabolites between the HFD-SHAM and HFD-SG groups. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were performed
followed by integrative analysis of transcriptomic and metabolomic data.
Results
2
Four weeks after surgery
compared with the HFD-HFD and HFD-SHAM groups
the HFD-SG group showed significantly reduced body weight and food intake (all
P
<
0.05)
improved glucose tolerance and insulin sensitivity (both
P
<
0.05)
and decreased levels of insulin
free fatty acids (FFA)
total cholesterol (TC)
and triglycerides (TG) (all
P
<
0.05). Transcriptomic analysis identified 763 DEGs between the HFD-SG and HFD-SHAM groups
including 384 upregulated and 379 downregulated genes. GO and KEGG enrichment analyses revealed activation of pathways such as steroid hormone biosynthesis. Metabolomic analysis identified 16 differential metabolites enriched in pathways including ascorbate and aldarate metabolism and folate-mediated one-carbon metabolism. Integrative analysis revealed that steroid biosynthesis and folate-mediated one-carbon metabolism pathways were significantly associated between the two groups. In the steroid biosynthesis pathway
genes including
LSS
Nsdhl
DHCR24
Hsd17b7
MSMO1
SQLE
and
CYP51
were upregulated in all three adipose tissues in the HFD-SG group but downregulated in the HFD-SHAM group
whereas the metabolite androstenediol was decreased in the HFD-SG group. In the folate-mediated one-carbon metabolism pathway
Aldh1l2
and
GNMT
were upregulated only in beige adipose tissue of the HFD-SHAM group
while
TYMS
and
Sardh
were upregulated in beige and white
adipose tissues of the HFD-SG group. The metabolite deoxythymidine monophosphate was increased in the HFD-SG group
consistent with gene expression trends.
Conclusion
2
SG significantly reduced body weight and food intake
improved glucose tolerance and insulin sensitivity
and corrected lipid metabolism disorders in HFD-induced obese mice. Bariatric surgery regulates steroid biosynthesis and folate-mediated one-carbon metabolism pathways in adipose tissue
altering key gene and metabolite expression profiles. These findings suggest that bariatric surgery improves systemic glucose and lipid metabolism by remodeling metabolic pathways in adipose tissue
providing novel molecular insights for the treatment of obesity and related metabolic diseases.
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