in vitro prebiotic effects and quantitative analysis of bulnesia sarmienti extract
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ID: 144561
2016
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Abstract
Prebiotics are used to influence the growth, colonization, survival, and activity of probiotics, and enhance the innate immunity, thus improving the health status of the host. The survival, growth, and activity of probiotics are often interfered with by intrinsic factors and indigenous microbes in the gastrointestinal tract. In this study, Bulnesia sarmienti aqueous extract (BSAE) was evaluated for the growth-promoting activity of different strains of Lactobacillus acidophilus, and a simple, precise, cost-effective high-performance liquid chromatography (HPLC) method was developed and validated for the determination of active prebiotic ingredients in the extract. Different strains of L. acidophilus (probiotic) were incubated in de Man, Rogosa, and Sharpe (MRS) medium with the supplementation of BSAE in a final concentration of 0.0%, 1.0%, and 3.0% (w/v) as the sole carbon source. Growth of the probiotics was determined by measuring the pH changes and colony-forming units (CFU/mL) using the microdilution method for a period of 24 hours. The HPLC method was designed by optimizing mobile-phase composition, flow rate, column temperature, and detection wavelength. The method was validated according to the requirements of a new method, including accuracy, precision, linearity, limit of detection, limit of quantitation, and specificity. The major prebiotic active ingredients in BSAE were determined using the validated HPLC method. The rapid growth rate of different strains of L. acidophilus was observed in growth media with BSAE, whereas the decline of pH values of cultures varied in different strains of probiotics depending on the time of culture. (+)-Catechin and (−)-epicatechin were identified on the basis of their retention time, absorbance spectrum, and mass spectrometry fragmentation pattern. The developed method met the limit of all validation parameters. The prebiotic active components, (+)-catechin and (−)-epicatechin, were quantified as 1.27% and 0.71% (w/w), respectively, in crude extract, and 6.36 ± 0.06 μg/mL and 4.47 ± 0.41 μg/mL (mean ± standard deviation), respectively, in a prebiotic capsule of BSAE by HPLC analysis. BSAE contains the active components of prebiotics and enhances the growth of L. acidophilus.
| Reference Key |
reza2016journalin vitro
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| Authors | ;Md Ahsanur Reza;Md Akil Hossain;Seung-Jin Lee;Jong-Choon Kim;Seung-Chun Park |
| Journal | polymers from renewable resources |
| Year | 2016 |
| DOI |
10.1016/j.jfda.2016.03.015
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