Effect of semolina pudding prepared from starch branching enzyme IIa and b mutant wheat on glycaemic response in vitro and in vivo: a randomised controlled pilot study

A - Papers appearing in refereed journals

Corrado, M., Cherta-Murillo, A., Chambers, E. S., Wood, A., Plummer, A., Lovegrove, A., Edwards, C. H., Frost, G. S. and Hazard, B. A. 2020. Effect of semolina pudding prepared from starch branching enzyme IIa and b mutant wheat on glycaemic response in vitro and in vivo: a randomised controlled pilot study. Food and Function. 11, pp. 617-627.

AuthorsCorrado, M., Cherta-Murillo, A., Chambers, E. S., Wood, A., Plummer, A., Lovegrove, A., Edwards, C. H., Frost, G. S. and Hazard, B. A.
Abstract

Refined starchy foods are usually rapidly digested, leading to poor glycaemic control, but not all starchy foods are the same. Complex carbohydrates like resistant starch (RS) have been shown to reduce the metabolic risk factors for chronic diseases such as hyperglycaemia and overweight. The aim of the project was to develop a semolina-based food made from a starch branching enzyme II (sbeIIa/b-AB) durum wheat mutant with a high RS content and to measure its glycaemic index using a double-blind randomised pilot study. We report here the amylose, RS and non-starch polysaccharide concentration of raw sbeIIa/b-AB and wild-type control (WT) semolina. We measured RS after cooking to identify a model food for in vivo testing. Retrograded sbeIIa/b-AB semolina showed a higher RS concentration than the WT control (RS = 4.87 ± 0.6 g per 100 g, 0.77 ± 0.34 g per 100 g starch DWB, respectively), so pudding was selected as the test food. Ten healthy participants consumed ∼50 g of total starch from WT and sbeIIa/b-AB pudding and a standard glucose drink. Capillary blood glucose concentrations were measured in the fasting and postprandial state (2 h): incremental area-under-the-curve (iAUC) and GI were calculated. We found no evidence of difference in GI between sbeIIa/b-AB pudding and the WT control, but the starch digestibility was significantly lower in sbeIIa/b-AB pudding compared to the WT control in vitro (C90 = 33.29% and 47.38%, respectively). Based on these results, novel sbeIIa/b-AB wheat foods will be used in future in vivo studies to test the effect of different RS concentrations and different food matrices on glycaemia.

Year of Publication2020
JournalFood and Function
Journal citation11, pp. 617-627
Digital Object Identifier (DOI)doi:10.1039/c9fo02460c
Open accessPublished as bronze (free) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeDFW - Designing Future Wheat - Work package 2 (WP2) - Added value and resilience
Publisher's version
Output statusPublished
Publication dates
Online13 Dec 2019
Publication process dates
Accepted09 Dec 2019
ISSN2042-650X
PublisherRoyal Society of Chemistry (RSC)

Permalink - https://repository.rothamsted.ac.uk/item/974yw/e-ect-of-semolina-pudding-prepared-from-starch-branching-enzyme-iia-and-b-mutant-wheat-on-glycaemic-response-in-vitro-and-in-vivo-a-randomised-controlled-pilot-study

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