Pentosans
Pentosans are mucilage in parts of plants, especially in cereal grain, and belong to the group of hemicelluloses .
construction
They consist of the pentoses arabinose and xylose , which together form an arabinoxylan .
Occasionally, however, arabinogalactans made from arabinose ( pentose ) and galactose ( hexose ) are also included.
Depending on the type of bond and the number of arabinose residues, the solution behavior in water varies (water-soluble and water-insoluble pentosans).
Occurrence
Pentosans can be found in many herbal products. Rye contains around 6–8% pentosans (distributed over the whole grain), wheat around 2–3%, which are concentrated in the outer layers of the grain.
The mucilage has a high water binding power, which is important for the dough formation of rye dough in the bakery: Since there is no gluten structure in the rye dough as in wheat dough, the mucilage is responsible for the dough formation.
Digestibility
Since the human body does not produce pentosanases ( enzymes that break down pentosans) in the digestive tract , they cannot be digested and are therefore classed as dietary fibers .
Medical benefit
Pentosan polysulfate (Fibrenzym ® ) is a heparinoid , so it is used to inhibit blood clotting in patients who cannot tolerate heparin .
A study on the symptomatic treatment of interstitial cystitis with pentosan polysulfate with the aid of electrical current shows a temporary replacement of the glycosaminoglycan barrier in the urinary bladder .
Individual evidence
- ↑ Waldemar Ternes: Scientific basics of food preparation . Behr's, Hamburg 2008, ISBN 978-3-89947-422-0 .
- ↑ a b Hans D. Belitz: Textbook of food chemistry. Springer-Verlag, 2013, ISBN 978-3-662-08310-9 , p. 528 ( limited preview in the Google book search).
- ↑ Annemie Loch, Olaf Dilk, Tillmann Loch, Michael Stöckle: EMDA (Electromotive Drug Administration) with pentosan polysulfate (PPS) in the therapy of IC . (PDF) 2004