title: Effect of substituent pattern and molecular weight of cellulose ethers on interactions with different bile salts.
abstract: Some known mechanisms proposed for the reduction of blood cholesterol by dietary fibre are: binding with bile salts in the duodenum and prevention of lipid absorption, which can be partially related with the bile salt binding. In order to gain new insights into the mechanisms of the binding of dietary fibre to bile salts, the goal of this work is to study the main interactions between cellulose derivatives and two types of bile salts. Commercial cellulose ethers: methyl (MC), hydroxypropyl (HPC) and hydroxypropylmethyl cellulose (HPMC), have been chosen as dietary fibre due to their highly functional properties important in manufactured food products. Two types of bile salts: sodium taurocholate (NaTC) and sodium taurodeoxycholate (NaTDC), have been chosen to understand the effect of the bile salt type. Interactions in the bulk have been investigated by means of differential scanning calorimetry (DSC) and linear mechanical spectroscopy. Results show that both bile salts have inhibitory effects on the thermal structuring of cellulose ethers and this depends on the number and type of substitution in the derivatised celluloses, and is not dependent upon molecular weight. Concerning the bile salt type, the more hydrophobic bile salt (NaTDC) has greater effect on these interactions, suggesting more efficient adsorption onto cellulose ethers. These findings may have implications in the digestion of cellulose-stabilised food matrices, providing a springboard to develop new healthy cellulose-based food products with improved functional properties.
authors: Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK. amelia.torcello_gomez@nottingham.ac.uk.
authors: Amelia
authors: A
authors: Torcello-Gómez
authors: Cristina
authors: C
authors: Fernández Fraguas
authors: Mike J
authors: MJ
authors: Ridout
authors: Nicola C
authors: NC
authors: Woodward
authors: Peter J
authors: PJ
authors: Wilde
authors: Timothy J
authors: TJ
authors: Foster
mesh_terms: D000327:Adsorption; D001647:Bile Acids and Salts / Q000037:antagonists & inhibitors / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D002236:Carbohydrate Conformation; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D055598:Chemical Phenomena; D004043:Dietary Fiber / Q000032:analysis*; D019587:Dietary Supplements; D055119:Elastic Modulus; D005503:Food Additives / Q000737:chemistry; D005527:Food, Fortified; D057927:Hydrophobic and Hydrophilic Interactions; D065347:Hypromellose Derivatives / Q000737:chemistry*; D055595:Mechanical Phenomena; D008747:Methylcellulose / Q000737:chemistry*; D008970:Molecular Weight; D012212:Rheology; D013656:Taurocholic Acid / Q000037:antagonists & inhibitors / Q000737:chemistry; D013657:Taurodeoxycholic Acid / Q000037:antagonists & inhibitors / Q000737:chemistry; D014783:Viscosity
chemical_list: D001647:Bile Acids and Salts; D004043:Dietary Fiber; D005503:Food Additives; D065347:Hypromellose Derivatives; D013657:Taurodeoxycholic Acid; D013656:Taurocholic Acid; D002482:Cellulose; D008747:Methylcellulose; C008079:hydroxypropylcellulose