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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Gene expression of xenobiotic metabolising enzymes in rat liver and kidney: differential effects of rooibos and honeybush herbal teas

Abrahams, Sameega January 2011 (has links)
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mso-style-parent:"" / mso-padding-alt:0cm 5.4pt 0cm 5.4pt / mso-para-margin-top:0cm / mso-para-margin-right:0cm / mso-para-margin-bottom:10.0pt / mso-para-margin-left:0cm / line-height:115% / mso-pagination:widow-orphan / font-size:11.0pt / font-family:"Calibri","sans-serif" / mso-ascii-font-family:Calibri / mso-ascii-theme-font:minor-latin / mso-hansi-font-family:Calibri / mso-hansi-theme-font:minor-latin / mso-bidi-font-family:"Times New Roman" / mso-bidi-theme-font:minor-bidi / mso-fareast-language:EN-US / } </style> <![endif]--></p> <p style="margin-bottom:0cm / margin-bottom:.0001pt / line-height: normal / mso-layout-grid-align:none / text-autospace:none" class="MsoNormal"><span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">Laboratory studies, epidemiological investigations and human clinical trials indicate</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">that flavonoids have important effects on cancer chemoprevention and therapy.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">Flavonoids may interfere in several steps that lead to cancer development but may</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">also lead to toxicity as the inhibition of carcinogen-activating enzymes may also cause</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">potential toxic flavonoid-drug interactions. However, the potential toxicity of these</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">dietary components has not been well studied. The use of polyphenol-enriched</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">supplements prepared from South African herbal teas, rooibos (</span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">Aspalathus linearis</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">)</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">and honeybush (</span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">Cyclopia </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">spp.) are being marketed to alleviate symptoms that are</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">known to be &ldquo / cured&rdquo / by the herbal teas. However, there is a lack of information</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">regarding the possible health promoting effects of these polyphenol-enriched extracts</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">on xenobiotic metabolism. In the present study, the modulating effects of aspalathinenriched</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">rooibos and mangiferin-enriched C. </span><i><span style="font-size:11.5pt / font-family: Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">genistoides </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">and </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">C. subternata </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">extracts on</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">the gene expression of xenobiotic metabolising enzymes (XMEs) were investigated </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in</span></i> <i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">vivo </span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">in the rat liver and kidneys. An </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">study, utilising a primary rat hepatocyte cell</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">model, was included to further evaluate changes in the expression of selected XMEs</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">by the herbal tea extracts, including their major polyphenolic constituents, aspalathin</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">and mangiferin. The use of the </span><i><span style="font-size:11.5pt / font-family: Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">primary hepatocytes assay as a predictive cell</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">model for the modulation of the expression of XMEs genes by the herbal tea extracts</span> <i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vivo </span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">was critically evaluated.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">In the liver and kidneys, the </span><i><span style="font-size:11.5pt / font-family: Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">C. subternata </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">polyphenol-enriched herbal tea extract</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">effected the majority of changes regarding the expression of XMEs genes when</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">compared to the rooibos and </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">C. genistoides</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">. Variations in the modulation of gene</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">expression of the XMEs by the herbal tea extracts were related to differences in their</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">polyphenol constituents, although non-polyphenolic constituent could also be involved.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">Overall the herbal teas regulated alcohol, energy, drug and steroid metabolism in the</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">liver, whereas in the kidneys the gene expression of phase I, phase II, steroid</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">metabolising enzymes, as well as drug transporters were modulated. It would appear</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">that the herbal teas are likely to exhibit both beneficial and adverse effects </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vivo</span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">, depending on the specific organ, the xenobiotic and/or drug that are involved. The</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">primary rat hepatocytes model display varying effects with respect to modulating gene</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">expression of specific XMEs by the polyphenol-enriched herbal tea extracts. Apart</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">from the reduction in 17<span style="font-size: 11.5pt / font-family:TT61t00 / mso-bidi-font-family:TT61t00">&beta / </span>-hydroxysteroid dehydrogenase gene expression care should</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">be taken to directly extrapolate the </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">findings to changes that prevail </span><i><span style="font-size: 11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vivo</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">However, interesting results regarding the masking effect of complex mixture on the</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">modulation of XME gene expression of individual polyphenols were encountered. In</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">addition differences in the dose and duration of exposure between the </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">and </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in</span></i> <i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">vivo </span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">studies were not comparable and should be further explored to validate the </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vitro</span></i> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">primary hepatocytes model to predict changes </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vivo</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">. Future studies should</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">investigate the effects of the herbal tea extracts, its polyphenols and etabolites on</span><span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica"> ME induction at a protein level as well as varying herb-drug-enzyme interactions.</span></p> <p>&nbsp / </p>
2

Gene expression of xenobiotic metabolising enzymes in rat liver and kidney: differential effects of rooibos and honeybush herbal teas

Abrahams, Sameega January 2011 (has links)
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mso-style-parent:"" / mso-padding-alt:0cm 5.4pt 0cm 5.4pt / mso-para-margin-top:0cm / mso-para-margin-right:0cm / mso-para-margin-bottom:10.0pt / mso-para-margin-left:0cm / line-height:115% / mso-pagination:widow-orphan / font-size:11.0pt / font-family:"Calibri","sans-serif" / mso-ascii-font-family:Calibri / mso-ascii-theme-font:minor-latin / mso-hansi-font-family:Calibri / mso-hansi-theme-font:minor-latin / mso-bidi-font-family:"Times New Roman" / mso-bidi-theme-font:minor-bidi / mso-fareast-language:EN-US / } </style> <![endif]--></p> <p style="margin-bottom:0cm / margin-bottom:.0001pt / line-height: normal / mso-layout-grid-align:none / text-autospace:none" class="MsoNormal"><span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">Laboratory studies, epidemiological investigations and human clinical trials indicate</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">that flavonoids have important effects on cancer chemoprevention and therapy.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">Flavonoids may interfere in several steps that lead to cancer development but may</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">also lead to toxicity as the inhibition of carcinogen-activating enzymes may also cause</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">potential toxic flavonoid-drug interactions. However, the potential toxicity of these</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">dietary components has not been well studied. The use of polyphenol-enriched</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">supplements prepared from South African herbal teas, rooibos (</span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">Aspalathus linearis</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">)</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">and honeybush (</span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">Cyclopia </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">spp.) are being marketed to alleviate symptoms that are</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">known to be &ldquo / cured&rdquo / by the herbal teas. However, there is a lack of information</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">regarding the possible health promoting effects of these polyphenol-enriched extracts</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">on xenobiotic metabolism. In the present study, the modulating effects of aspalathinenriched</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">rooibos and mangiferin-enriched C. </span><i><span style="font-size:11.5pt / font-family: Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">genistoides </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">and </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">C. subternata </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">extracts on</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">the gene expression of xenobiotic metabolising enzymes (XMEs) were investigated </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in</span></i> <i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">vivo </span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">in the rat liver and kidneys. An </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">study, utilising a primary rat hepatocyte cell</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">model, was included to further evaluate changes in the expression of selected XMEs</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">by the herbal tea extracts, including their major polyphenolic constituents, aspalathin</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">and mangiferin. The use of the </span><i><span style="font-size:11.5pt / font-family: Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">primary hepatocytes assay as a predictive cell</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">model for the modulation of the expression of XMEs genes by the herbal tea extracts</span> <i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vivo </span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">was critically evaluated.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">In the liver and kidneys, the </span><i><span style="font-size:11.5pt / font-family: Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">C. subternata </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">polyphenol-enriched herbal tea extract</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">effected the majority of changes regarding the expression of XMEs genes when</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">compared to the rooibos and </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">C. genistoides</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">. Variations in the modulation of gene</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">expression of the XMEs by the herbal tea extracts were related to differences in their</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">polyphenol constituents, although non-polyphenolic constituent could also be involved.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">Overall the herbal teas regulated alcohol, energy, drug and steroid metabolism in the</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">liver, whereas in the kidneys the gene expression of phase I, phase II, steroid</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">metabolising enzymes, as well as drug transporters were modulated. It would appear</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">that the herbal teas are likely to exhibit both beneficial and adverse effects </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vivo</span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">, depending on the specific organ, the xenobiotic and/or drug that are involved. The</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">primary rat hepatocytes model display varying effects with respect to modulating gene</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">expression of specific XMEs by the polyphenol-enriched herbal tea extracts. Apart</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">from the reduction in 17<span style="font-size: 11.5pt / font-family:TT61t00 / mso-bidi-font-family:TT61t00">&beta / </span>-hydroxysteroid dehydrogenase gene expression care should</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">be taken to directly extrapolate the </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">findings to changes that prevail </span><i><span style="font-size: 11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vivo</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">.</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">However, interesting results regarding the masking effect of complex mixture on the</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">modulation of XME gene expression of individual polyphenols were encountered. In</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">addition differences in the dose and duration of exposure between the </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vitro </span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">and </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in</span></i> <i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">vivo </span></i><span style="font-size:11.5pt / font-family: &quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">studies were not comparable and should be further explored to validate the </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family: Helvetica-Oblique">in vitro</span></i> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">primary hepatocytes model to predict changes </span><i><span style="font-size:11.5pt / font-family:Helvetica-Oblique / mso-bidi-font-family:Helvetica-Oblique">in vivo</span></i><span style="font-size:11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family: Helvetica">. Future studies should</span> <span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica">investigate the effects of the herbal tea extracts, its polyphenols and etabolites on</span><span style="font-size: 11.5pt / font-family:&quot / Helvetica&quot / ,&quot / sans-serif&quot / mso-bidi-font-family:Helvetica"> ME induction at a protein level as well as varying herb-drug-enzyme interactions.</span></p> <p>&nbsp / </p>

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