ABSTRACT：Blackberry fiber (BF), extracted blackberry fiber (EBF), defatted blackberry seeds (DBS), and blackberry polyphenols (BP) were added to the diets of rats. A control diet, fiber diets (BF, EBF, DBS) with 6% addition instead of cellulose, and a polyphenol diet (BP) with 1% addition were administered for 4 weeks. BF and DBS contained polyphenols (3.6%); EBF did not. DBS was free of fat. Ellagitannins were the main phenolics, mostly dimers (sanguiin H-6 with isomers) and monomers (pedunculagin, casuarictin isomer, and sanguiin H-2 isomer). Trimers (lambertianin C with isomers) and tetramers (lambertianin D) were in the minority. EBF increased the production of propionate and butyrate in the cecum and improved the blood lipid profile. Polyphenols beneficially decreased the activity of cecal β-glucuronidase, but they may have also increased cholesterol levels in blood. Bacterial metabolism of ellagitannins in the colon gave rise to nasutin A and urolithin A.

KEY WORDS: blackberry, dietary fiber, ellagitannins, rat, nasutin A

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Chemical Composition of Blackberry Press Cake, Polyphenolic Extract, and Defatted Seeds, and Their Effects on Cecal Fermentation,Bacterial Metabolites, and Blood Lipid Profile in Rats

Monika Kosmala,*,† Adam Jurgonś ki,*,‡ Jerzy Jusḱ iewicz,‡ Elzḃ ieta Karlinś ka,† Jakub Macierzynś ki,†Edward Rój,§ and Zenon Zduńczyk‡

 †Institute of Food Technology and Analysis, Lodz University of Technology, ul. Stefanowskiego 4/10, 90-924 Lodz, Poland
‡Division of Food Science, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-748
Olsztyn, Poland§New Chemical Syntheses Institute, Aleja Tysiąclecia Państwa Polskiego 13a, 24-110 Puławy, Poland

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