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Information Journal Paper

Title

The effect of dietary CP and NFC different levels on UT-B expression: A metaanalysis

Pages

  55-71

Abstract

 Introduction: As is already known, urea transport across the ruminant wall is mediated via Urea Transporters in the epithelium membrane (Stewart et al. 2005). Facilitative Urea Transporters are derived from the UT-A and UT-B genes. UT-B mRNA or Protein expressions have been characterized in the rumen epithelium (Ludden et al. 2009; Marini and Van Amburgh 2003; Marini et al. 2004; Stewart et al. 2005). Gene transcript abundance for UT-B is significantly correlated with the ruminal serosal to mucosal urea fluxes. However, the mechanism by which the increased gene expression occurred is unclear (Jin et al. 2018). Transcriptome analysis has been used to analyze the rumen epithelium metabolic pathway changes under various conditions (Baldwin et al 2012; Dionissopoulos et al 2014; Naeem et al 2014). The regulation of these urea transport mechanisms across the rumen wall may be reavealed through this approach. Material and methods: Literature searches were performed through various databases (Google Scholar, PubMed, Medline, Science Direct, Scopus, Web of Science). The keywords used to search relevant studies included: Carbohydrate, Dietary, Protein and Urea Transporter. Based on the selection criteria, only 11 articles were included in the database for the final analysis. The response variables extracted for the Meta-analysis included pH, VFAS, N-NH3 and UT-B expression. Meta-analysis was carried out using the Comprehensive Meta-analysis package, version 3. The effect sizes of across studies were calculated with fixed and random effect models. The presence of true heterogeneity among studies was identified with Cochran’ s Q– tests and quantification of the degree of heterogeneity was done with the I 2 index. Possible publication bias was evaluated with funnel plot and statistical tests (Vesterinen et al. 2014). Results and discussion: The results of current Meta-analysis showed that different levels of CP in diet, has a positive effect on ruminal N-NH3 concentration and UT-B expression (<0. 05). However, different levels of Dietary CP had insignificant effects on ruminal pH and VFAS concentration. The values of I 2 and Q for ruminal N-NH3 concentration and UT-B expression effect size indicated high and moderate heterogeneity, respectively. Different levels of NFC in diet increased ruminal VFAS concentration and UT-B expression (<0. 05). Different levels of Dietary NFC decreased ruminal pH (<0. 05). Ruminal N-NH3 concentration was not influenced by different levels of Dietary NFC. The values of I 2 and Q for pH and UT-B expression effect size indicated high heterogeneity. Conclusion: According to the results of current Meta-analysis, both Dietary CP and NFC increase UT-B expression. It seems however that the NFC have a greater effect on increasing UT-B expression than CP.

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    APA: Copy

    IBRAHIMI KHORAM ABADI, E., & KAZEMI, M.. (2021). The effect of dietary CP and NFC different levels on UT-B expression: A metaanalysis. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), 31(3 ), 55-71. SID. https://sid.ir/paper/957621/en

    Vancouver: Copy

    IBRAHIMI KHORAM ABADI E., KAZEMI M.. The effect of dietary CP and NFC different levels on UT-B expression: A metaanalysis. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ)[Internet]. 2021;31(3 ):55-71. Available from: https://sid.ir/paper/957621/en

    IEEE: Copy

    E. IBRAHIMI KHORAM ABADI, and M. KAZEMI, “The effect of dietary CP and NFC different levels on UT-B expression: A metaanalysis,” ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), vol. 31, no. 3 , pp. 55–71, 2021, [Online]. Available: https://sid.ir/paper/957621/en

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