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Exploring the Dose–Effect Relationship of IBifidobacterium longum/I in Relieving Loperamide Hydrochloride-Induced Constipation in Rats through Colon-Released Capsules

International journal of molecular sciences, 2023-04, Vol.24 (7) [Peer Reviewed Journal]

COPYRIGHT 2023 MDPI AG ;ISSN: 1422-0067 ;EISSN: 1422-0067 ;DOI: 10.3390/ijms24076585

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  • Title:
    Exploring the Dose–Effect Relationship of IBifidobacterium longum/I in Relieving Loperamide Hydrochloride-Induced Constipation in Rats through Colon-Released Capsules
  • Author: Zhou, Xin ; Mao, Bingyong ; Tang, Xin ; Zhang, Qiuxiang ; Zhao, Jianxin ; Zhang, Hao ; Cui, Shumao
  • Subjects: Constipation ; Loperamide ; Risk factors
  • Is Part Of: International journal of molecular sciences, 2023-04, Vol.24 (7)
  • Description: Constipation is a common disease affecting humans. Bifidobacterium longum is reportedly effective in relieving constipation. Current studies generally focus on the dose-response relationship of oral doses; however, the dose-effect relationship of B. longum in the colon, which is the primary site where B. longum exerts constipation-relieving effects, to treat constipation has not been studied. Herein, three strains of B. longum (FGSZY6M4, FJSWXJ10M2, and FSDJN6M3) were packaged in colon-released capsules to explore the dose-effect relationship in the colon. For each strain, three groups of capsules (10[sup.4], 10[sup.6], and 10[sup.8] CFU/capsule, respectively) and one group of free probiotics (10[sup.8] CFU/mL) were used to explore the colonic dose effect of B. longum. The results showed that the three strains of B. longum improved fecal water content and promoted intestinal motility by regulating gastrointestinal peptide (MTL, GAS, and VIP), aquaporin-3, and 5-hydroxytryptamine levels while promoting gastrointestinal motility and relieving constipation by regulating the intestinal flora composition of constipated rats and changing their metabolite content (short-chain fatty acids). Among the three free bacterial solution groups (10[sup.8] CFU/mL), FGSZY6M4 was the most effective in relieving constipation caused by loperamide hydrochloride in rats. The optimal effective dose of each strain was 6M4 (10[sup.4] CFU/day), 10M2 (10[sup.6] CFU/day), and S3 (10[sup.8] CFU/day) of the colon-released capsules. Therefore, for some effective strains, the dose of oral probiotics can be reduced by colon-released capsules, and constipation can be relieved without administering a great number of bacterial solutions. Therefore, investigating the most effective dose of B. longum at the colon site can help to improve the efficiency of relieving constipation.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: ISSN: 1422-0067
    EISSN: 1422-0067
    DOI: 10.3390/ijms24076585
  • Source: Open Access: PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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