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补充益生菌的早产儿肠道微生物群分析

知几学术 知几未来研究院 2022-01-16

Gut microbiota of preterm infants supplementedwith probiotics: sub-study of the ProPrems trial

Crusell etal. BMC microbiology (2018)

DOI 10.1186/s40168-018-0472-x

补充益生菌的早产儿肠道微生物群分析

Gut microbiota of preterm infants supplementedwith probiotics: sub-study of the ProPrems trial


Abstract

Background: The ProPrems trial, a multi-center, double-blind,placebo-controlled randomized trial, previously reported a 54% reduction innecrotizing enterocolitis (NEC) of Bell stage 2 or more from 4.4 to 2.0% in1099 infants born before 32 completed weeks’ gestation and weighing < 1500g, receiving probiotic supplementation (with Bifidobacterium longum subsp. infantis BB-02, Streptococcus thermophilusTH-4 and Bifidobacteriumanimalis subsp. lactis BB-12). Thissub-study investigated the effect of probiotic supplementation on the gutmicrobiota in a cohort of very preterm infants in ProPrems.

Results: Bifidobacterium was found in higher abundance in infants who received theprobiotics (AOR 17.22; 95% CI, 3.49–84.99, p < 0.001) as compared to theplacebo group, and Enterococcus was reduced in infants receiving the probioticduring the supplementation period (AOR 0.27; 95% CI, 0.09–0.82, p = 0.02).

Conclusion: Probiotic supplementation with BB-02, TH-4 and BB-12 from soonafter birth increased the abundance of Bifidobacterium in thegut microbiota of very preterm infants. Increased abundance of Bifidobacterium soon after birth may be associated with reducing the risk of NEC invery preterm infants.

 

极早产婴儿(出生<32周,体重<1500g)发生迟发性败血症和坏死性小肠结肠炎(NEC)的风险增加,并有可能产生终生不利的健康影响或死亡。早产儿的肠道微生物群与足月新生儿不同,包括物种多样性降低、肠杆菌科(包括肺炎克雷伯菌和大肠杆菌)和艰难梭菌数量增加、双歧杆菌和乳杆菌数量减少。这些差异可能是与未成熟相关的宿主因素以及环境因素造成的,包括分娩方式、接触母体微生物减少、接触抗生素治疗、母乳喂养不足以及在新生儿重症监护病房逗留时间长等。在本研究中,通过队列研究,检测了极早产婴儿的肠道细菌群落,并研究了益生菌补充剂对早产儿肠道微生物群发展的影响。

 

研究对象:澳大利亚早产儿(68位早产儿的253份拭子样本)。

 

入组条件:32周以下、体重小于1500g的极早产儿。

 

实验设计:多中心;双盲;益生菌干预组、安慰剂对照组。

 

研究方法:不同时间点采集粪便拭子或肛拭子:开始研究前;治疗开始一周、四周、八周,经早产校正后的6个月、12个月。

 

检测方法:16S rRNA基因测序

 

研究结果

  1. 双歧杆菌是益生菌补充婴儿中最常见的亚门属(90%的益生菌婴儿标本中检出双歧杆菌,55%的对照组婴儿标本中检出双歧杆菌);

  2. 在从益生菌婴儿中采集的样本中,有75%存在链球菌,而在对照婴儿中有53%存在链球菌;

  3. 肠杆菌是对照组婴儿标本中最常见的属(在对照组婴儿标本中检测到的肠杆菌占85%,而在益生菌婴儿标本中检测到的肠杆菌占77%);

  4. 在所有补充益生菌的婴儿中,至少有一个样本检出双歧杆菌和链球菌;相反,所有对照婴儿中至少有一份标本检出肠杆菌、大肠杆菌/志贺氏杆菌和肠球菌;

  5. 回归分析得出结论,接受益生菌的婴儿双歧杆菌的丰度增加,肠球菌丰度降低,链球菌的丰度没有显著差异。

 

Fig.1 Compares the percent abundance of specific genera between the probiotic andplacebo infants. The 12 genera included had a meanabundance of at least 1% in one (or both) allocation group and were included inthe regression analysis. Bacteria not included in the regression analysis aregrouped under “Other bacteria”

图1 比较了益生菌和安慰剂婴儿之间特定属的丰度百分比。这12个属在一个(或两个)分配组中的平均丰度至少为1%,并被纳入回归分析。回归分析中未包括的细菌归为“其他细菌”类。



知几未来研究院正在搭建一个“疾病-肠道菌群”知识库

你可以在公众号对话框回复“IBD”或“肠易激综合征”,查看与疾病相关的菌群

也可以回复“双歧杆菌”或“Hp”,查看与细菌相关的疾病



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