Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction Methods
The objective of this study was to establish the composition of strawberry preparations rich in ellagitannins obtained using water or acetone extraction (EF and EP preparation, respectively). Then, biological effect of these extracts was assessed in 4-wk nutritional experiment on Wistar rats. The pr...
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| Format: | Article |
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Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences
2015-09-01
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| Series: | Polish Journal of Food and Nutrition Sciences |
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| Online Access: | http://www.degruyter.com/view/j/pjfns.2015.65.issue-3/pjfns-2015-0007/pjfns-2015-0007.xml?format=INT |
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| author | Juśkiewicz Jerzy Król Bogusław Kosmala Monika Milala Joanna Zduńczyk Zenon Żary-Sikorska Ewa |
| author_facet | Juśkiewicz Jerzy Król Bogusław Kosmala Monika Milala Joanna Zduńczyk Zenon Żary-Sikorska Ewa |
| author_sort | Juśkiewicz Jerzy |
| collection | DOAJ |
| description | The objective of this study was to establish the composition of strawberry preparations rich in ellagitannins obtained using water or acetone extraction (EF and EP preparation, respectively). Then, biological effect of these extracts was assessed in 4-wk nutritional experiment on Wistar rats. The preparations were applied in cholesterol-containing diets that had equal content of ellagitannins (0.03%). To measure animals response, parameters describing the caecal fermentation (ammonia and short-chain fatty acid concentrations, bacterial enzymes activity), blood serum lipoprotein profile, and TBARS content in selected tissues (heart, liver, kidney) were assessed. Apart from polyphenols, including ellagitannins (7.8 and 7.1%, respectively), the EF preparation contained high quantities of soluble dietary fibre and other carbohydrates (33.3 and 38.9%, respectively), whereas the EP preparation was characterised by 58.9% content of ellagitannins, no dietary fibre and a high content of proanthocyanidins (16.9%). In comparison to EF group, the dietary treatment with EP had a stronger effect on caecal environment as manifested by decreased digesta bulk, β-glucuronidase activity and total short-chain fatty acid concentration (P<0.05 vs. group C without supplementation). Both preparations lowered lipaemia and glycaemia. It could be concluded that more efficient acetone extraction of strawberry pomace increased the content of both ellagitannins and proanthocyanidins in the polyphenolic preparation, which caused a stronger inhibiting effect on caecal fermentation processes and at the same time lowered blood triacylglycerols and glucose level. Considering the equal content of ellagitannins in both supplemented diets, it may be speculated that the above effects were due to the presence of proanthocyanidin fraction. |
| format | Article |
| id | doaj-art-a0bfc80bdca443a7b5c9fcb2d41a0689 |
| institution | Kabale University |
| issn | 2083-6007 |
| language | English |
| publishDate | 2015-09-01 |
| publisher | Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences |
| record_format | Article |
| series | Polish Journal of Food and Nutrition Sciences |
| spelling | doaj-art-a0bfc80bdca443a7b5c9fcb2d41a06892025-02-02T22:02:30ZengInstitute of Animal Reproduction and Food Research of the Polish Academy of SciencesPolish Journal of Food and Nutrition Sciences2083-60072015-09-0165319920910.1515/pjfns-2015-0007pjfns-2015-0007Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction MethodsJuśkiewicz Jerzy0Król Bogusław1Kosmala Monika2Milala Joanna3Zduńczyk Zenon4Żary-Sikorska Ewa5Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Division of Food Science, Tuwima 10, 10–748 Olsztyn, PolandInstitute of Chemical Technology of Food, Technical University of Łódź, Stefanowskiego 4/10, 90–924 Łódź, PolandInstitute of Chemical Technology of Food, Technical University of Łódź, Stefanowskiego 4/10, 90–924 Łódź, PolandInstitute of Chemical Technology of Food, Technical University of Łódź, Stefanowskiego 4/10, 90–924 Łódź, PolandInstitute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Division of Food Science, Tuwima 10, 10–748 Olsztyn, PolandUniversity of Science and Technology, Bernardyńska 6/8, Bydgoszcz, PolandThe objective of this study was to establish the composition of strawberry preparations rich in ellagitannins obtained using water or acetone extraction (EF and EP preparation, respectively). Then, biological effect of these extracts was assessed in 4-wk nutritional experiment on Wistar rats. The preparations were applied in cholesterol-containing diets that had equal content of ellagitannins (0.03%). To measure animals response, parameters describing the caecal fermentation (ammonia and short-chain fatty acid concentrations, bacterial enzymes activity), blood serum lipoprotein profile, and TBARS content in selected tissues (heart, liver, kidney) were assessed. Apart from polyphenols, including ellagitannins (7.8 and 7.1%, respectively), the EF preparation contained high quantities of soluble dietary fibre and other carbohydrates (33.3 and 38.9%, respectively), whereas the EP preparation was characterised by 58.9% content of ellagitannins, no dietary fibre and a high content of proanthocyanidins (16.9%). In comparison to EF group, the dietary treatment with EP had a stronger effect on caecal environment as manifested by decreased digesta bulk, β-glucuronidase activity and total short-chain fatty acid concentration (P<0.05 vs. group C without supplementation). Both preparations lowered lipaemia and glycaemia. It could be concluded that more efficient acetone extraction of strawberry pomace increased the content of both ellagitannins and proanthocyanidins in the polyphenolic preparation, which caused a stronger inhibiting effect on caecal fermentation processes and at the same time lowered blood triacylglycerols and glucose level. Considering the equal content of ellagitannins in both supplemented diets, it may be speculated that the above effects were due to the presence of proanthocyanidin fraction.http://www.degruyter.com/view/j/pjfns.2015.65.issue-3/pjfns-2015-0007/pjfns-2015-0007.xml?format=INTKeywords strawberryextraction methodellagitanninsdietary fibrecaecumrats |
| spellingShingle | Juśkiewicz Jerzy Król Bogusław Kosmala Monika Milala Joanna Zduńczyk Zenon Żary-Sikorska Ewa Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction Methods Polish Journal of Food and Nutrition Sciences Keywords strawberry extraction method ellagitannins dietary fibre caecum rats |
| title | Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction Methods |
| title_full | Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction Methods |
| title_fullStr | Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction Methods |
| title_full_unstemmed | Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction Methods |
| title_short | Physiological Properties of Dietary Ellagitannin-Rich Preparations Obtained from Strawberry Pomace Using Different Extraction Methods |
| title_sort | physiological properties of dietary ellagitannin rich preparations obtained from strawberry pomace using different extraction methods |
| topic | Keywords strawberry extraction method ellagitannins dietary fibre caecum rats |
| url | http://www.degruyter.com/view/j/pjfns.2015.65.issue-3/pjfns-2015-0007/pjfns-2015-0007.xml?format=INT |
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