Metabolite level of intestinal flora in patients with major depression and its correlation with inflammatory factors
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摘要:
目的 分析重度抑郁症(MDD)患者的肠道菌群特征及其代谢产物水平,并探讨其与炎症因子的关系。 方法 选取2020年5月—2023年5月于绍兴市第七人民医院接受治疗的98例MDD患者作为研究对象,再选取同期于该院接受健康检查的50例健康人群作为对照组。对比MDD患者与健康人群的肠道菌群代谢产物水平以及炎症因子水平差异,采用Pearson相关性分析肠道菌群代谢产物水平及其与炎症因子的关系。 结果 MDD组的IL-1β[(55.48±12.08)ng/L]等炎症因子水平高于对照组[(42.15±10.03)ng/L, t=7.124,P < 0.001],MDD组的氧化三甲胺(TMAO)水平[(3.25±0.71)μmol/L]高于对照组[(1.37±0.24)μmol/L, t=23.694,P < 0.001],MDD组短链脂肪酸(SCFAs)总量[(18.26±2.94)μg/g]均低于对照组[(22.03±3.25)μg/g,t=6.889,P < 0.001];MDD组的TMAO和IL-1β(r=0.404)、IL-6(r=0.503)、CRP(r=0.454)水平呈正相关,和TNF-α水平(r=-0.348)呈负相关,SCFAs和IL-1β(r=-0.478)、IL-6(r=-0.378)、CRP水平(r=-0.416)均呈负相关关系(P < 0.05)。 结论 MDD患者肠道菌群代谢产物TMAO、SCFAs的水平与炎症因子水平密切相关,恢复肠道菌群代谢产物的平衡可在MDD的治疗中发挥重要作用。 Abstract:Objective To analyze the characteristics of intestinal flora and the level of its metabolites in patients with major depressive disorder (MDD), and to explore its relationship with inflammatory factors. Methods A total of 98 MDD patients who were treated in Shaoxing Seventh People ' s Hospital from May 2020 to May 2023 were selected as the research object and 50 healthy people who received health examination in the same period were selected as the control group. The levels of intestinal flora metabolites and inflammatory factors between MDD patients and healthy people were compared, and the relationship between intestinal flora metabolites and inflammatory factors was analyzed by Pearson correlation. Results The levels of IL-1β[(55.48±12.08) ng/L] and other inflammatory factors in the MDD group were higher than those in the control group [(42.15±10.03) ng/L, t=7.124, P < 0.001]. The trimetlylamine oxide (TMAO) level in the MDD group [(3.25±0.71) μmol/L] was higher than that in the control group [(1.37±0.24) μmol/L, t=23.694, P < 0.001]. The total amount of short chain fatty acids (SCFAs) in the MDD group [(18.26±2.94) μg/g] was lower than that in the control group [(22.03±3.25) μg/g, t=6.889, P < 0.001]. In the MDD group, the TMAO level was positively correlated with the level of IL-1β (r=0.404), IL-6 (r=0.503), and CRP (r=0.454), and negatively correlated with TNF-αlevel (r=-0.348). The levels of SCFAs and IL-1β (r=-0.478), IL-6 (r=-0.378), and CRP (r=-0.416) were negatively correlated (P < 0.05). Conclusion The levels of TMAO and SCFAs in the intestinal flora of MDD patients are closely related to the levels of inflammatory factors, and restoring the balance of intestinal flora metabolites plays an important role in the treatment of MDD. -
表 1 对照组和MDD组的一般资料比较
Table 1. Comparison of general data between the control group and the MDD group
项目 对照组(n=50) MDD组(n=98) 统计量 P值 年龄(x±s,岁) 44.55±7.26 45.31±8.06 0.580a 0.563 性别[例(%)] 0.483b 0.487 男性 23(46.00) 51(52.04) 女性 27(54.00) 47(47.96) 教育程度(x±s,年) 12.76±3.72 13.42±3.11 1.077a 0.285 BMI(x±s) 21.89±2.51 22.27±3.02 0.812a 0.419 吸烟史[例(%)] 2(4.00) 3(3.06) 0.033b 0.856 饮酒史[例(%)] 3(6.00) 8(8.16) 0.021b 0.886 家族史[例(%)] 0 11(11.22) 4.451b 0.033 婚姻状况[例(%)] 1.266b 0.509 已婚 36(72.00) 62(63.27) 未婚 12(24.00) 32(32.65) 其他 2(4.00) 4(4.08) 注:a为t值,b为χ2值。 表 2 对照组和MDD组的肠道菌群分布比较(x±s,%)
Table 2. Comparison of intestinal flora distribution between the control group and the MDD group(x±s, %)
组别 例数 门分类 属分类 厚壁菌门 放线菌门 变形菌门 拟杆菌门 双歧杆菌属 乳酸杆菌属 普雷沃氏菌属 瘤胃菌属 粪球菌属 对照组 50 55.23±2.23 24.88±1.15 10.07±0.86 2.74±0.41 17.02±1.18 11.73±0.54 7.15±1.40 6.57±0.71 9.12±0.53 MDD组 98 47.25±1.76 30.15±2.07 14.22±0.99 6.25±1.18 13.52±1.06 8.14±0.71 12.52±3.22 5.13±0.66 7.86±0.83 t值 22.042 19.894 26.356 26.480 17.652 34.267 14.102 11.947 11.204 P值 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 表 3 对照组和MDD组的炎症因子水平比较(x±s)
Table 3. Comparison of levels of inflammatory factors between the control group and the MDD group(x±s)
组别 例数 IL-1β(ng/L) IL-6(ng/L) TNF-α(ng/L) CRP(mg/L) 对照组 50 42.15±10.03 26.13±8.11 50.34±7.08 4.12±0.87 MDD组 98 55.48±12.08 29.87±3.62 45.19±8.89 7.15±1.33 t值 7.124 3.107 3.829 16.632 P值 < 0.001 0.003 < 0.001 < 0.001 表 4 对照组和MDD组的肠道菌群代谢产物水平比较(x±s)
Table 4. Comparison of intestinal flora metabolites between the control group and the MDD group(x±s)
组别 例数 TMAO(μmol/L) SCFAs(μg/g) 丁酸 丙酸 乙酸 总量 对照组 50 1.37±0.24 4.25±0.61 4.48±0.64 13.25±1.57 22.03±3.25 MDD组 98 3.25±0.71 2.41±0.34 3.65±0.42 12.45±1.84 18.26±2.94 t值 23.694 19.816 8.303 2.763 6.889 P值 < 0.001 < 0.001 < 0.001 0.007 < 0.001 表 5 MDD组肠道菌群代谢产物水平与炎症因子水平的相关性
Table 5. Correlation analysis between the intestinal flora metabolites and inflammatory factor levels in the MDD group
项目 TMAO SCFAs 双歧杆菌 乳酸杆菌 r值 P值 r值 P值 r值 P值 r值 P值 IL-1β 0.404 < 0.001 -0.478 < 0.001 -0.555 < 0.001 -0.459 < 0.001 IL-6 0.503 < 0.001 -0.378 < 0.001 -0.489 < 0.001 -0.450 < 0.001 TNF-α -0.348 < 0.001 0.290 0.004 0.474 < 0.001 0.541 < 0.001 CRP 0.454 < 0.001 -0.416 < 0.001 -0.417 < 0.001 -0.382 < 0.001 -
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