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On-line Access: 2023-08-08

Received: 2022-08-31

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Crosschecked: 2023-08-08

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Xianghua YAN

https://orcid.org/0000-0003-2238-6218

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Journal of Zhejiang University SCIENCE B 2023 Vol.24 No.8 P.734-748

http://doi.org/10.1631/jzus.B2200439


Lactobacillus gasseri LA39 promotes hepatic primary bile acid biosynthesis and intestinal secondary bile acid biotransformation


Author(s):  Jun HU, Qiliang HOU, Wenyong ZHENG, Tao YANG, Xianghua YAN

Affiliation(s):  National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Frontiers Science Center for Animal Breeding and Sustainable Production, College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan 430070, China; more

Corresponding email(s):   xhyan@mail.hzau.edu.cn

Key Words:  Lactobacillus gasseri LA39, Liver, Isobaric tags for relative and absolute quantitation (iTRAQ), Bile acid, Germ-free mice


Jun HU, Qiliang HOU, Wenyong ZHENG, Tao YANG, Xianghua YAN. Lactobacillus gasseri LA39 promotes hepatic primary bile acid biosynthesis and intestinal secondary bile acid biotransformation[J]. Journal of Zhejiang University Science B, 2023, 24(8): 734-748.

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%T Lactobacillus gasseri LA39 promotes hepatic primary bile acid biosynthesis and intestinal secondary bile acid biotransformation
%A Jun HU
%A Qiliang HOU
%A Wenyong ZHENG
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T1 - Lactobacillus gasseri LA39 promotes hepatic primary bile acid biosynthesis and intestinal secondary bile acid biotransformation
A1 - Jun HU
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A1 - Xianghua YAN
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B2200439


Abstract: 
A growing body of evidence has linked the gut microbiota to liver metabolism. The manipulation of intestinal microflora has been considered as a promising avenue to promote liver health. However, the effects of Lactobacillus gasseri LA39, a potential probiotic, on liver metabolism remain unclear. Accumulating studies have investigated the proteomic profile for mining the host biological events affected by microbes, and used the germ-free (GF) mouse model to evaluate host-microbe interaction. Here, we explored the effects of L. gasseri LA39 gavage on the protein expression profiles of the liver of GF mice. Our results showed that a total of 128 proteins were upregulated, whereas a total of 123 proteins were downregulated by treatment with L. gasseri LA39. Further bioinformatics analyses suggested that the primary bile acid (BA) biosynthesis pathway in the liver was activated by L. gasseri LA39. Three differentially expressed proteins (cytochrome P450 family 27 subfamily A member 1 (CYP27A1), cytochrome P450 family 7 subfamily B member 1 (CYP7B1), and cytochrome P450 family 8 subfamily B member 1 (CYP8B1)) involved in the primary BA biosynthesis pathway were further validated by western blot assay. In addition, targeted metabolomic analyses demonstrated that serum and fecal β‍-muricholic acid (a primary BA), dehydrolithocholic acid (a secondary BA), and glycolithocholic acid-3-sulfate (a secondary BA) were significantly increased by L. gasseri LA39. Thus, our data revealed that L. gasseri LA39 activates the hepatic primary BA biosynthesis and promotes the intestinal secondary BA biotransformation. Based on these findings, we suggest that L. gasseri LA39 confers an important function in the gut‒liver axis through regulating BA metabolism.

格氏乳酸杆菌LA39促进了肝脏初级胆汁酸的生物合成和肠道次级胆汁酸的生物转化

胡军1,2,3, 侯奇良1,2,3, 郑文涌1,2,3, 杨涛1,2,3, 晏向华1,2,3
1农业微生物资源发掘与利用全国重点实验室, 湖北洪山实验室, 动物育种与健康养殖前沿科学中心,动物科学技术学院, 华中农业大学, 中国武汉市, 430070
2生猪健康养殖协同创新中心, 中国武汉市, 430070
3生猪精准饲养与饲料安全技术湖北省工程实验室, 中国武汉市, 430070
摘要: 越来越多的证据已将肠道微生物与肝脏代谢联系在一起。肠道菌群干预已被视为一条有望促进肝脏健康的途径。然而,格氏乳酸杆菌LA39(一种潜在的益生菌)对肝脏代谢的影响仍不明确。大量的研究已通过分析蛋白组图谱来挖掘受微生物影响的宿主生物学事件,并利用无菌小鼠模型来研究宿主与微生物的互作。在本研究中,我们探讨了格氏乳酸杆菌LA39灌服处理对无菌小鼠肝脏蛋白表达图谱的影响。结果表明,格氏乳酸杆菌LA39可导致128个肝脏蛋白质的表达上调,以及123个肝脏蛋白质的表达下调。进一步的生物信息学分析表明,格氏乳酸杆菌LA39可激活肝脏中初级胆汁酸的生物合成通路。蛋白免疫印迹实验进一步验证了参与初级胆汁酸生物合成通路的三个差异表达蛋白(CYP27A1、CYP7B1和CYP8B1)。此外,靶向代谢组学分析证明了格氏乳酸杆菌LA39可显著增加血清和粪便中的β-鼠胆酸(一种初级胆汁酸)、脱氢石胆酸(一种次级胆汁酸)和甘氨石胆酸-3-硫酸盐(一种次级胆汁酸)的含量。综上所述,格氏乳酸杆菌LA39可激活肝脏中初级胆汁酸的生物合成,并促进肠道中次级胆汁酸的生物转化。这些研究发现暗示了格氏乳酸杆菌LA39通过调控胆汁酸代谢在肠-肝轴中发挥了重要功能。

关键词:格氏乳酸杆菌LA39;肝脏;同位素标记相对和绝对定量(iTRAQ);胆汁酸;无菌小鼠

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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