Dataset Information

The effects of Jerusalem artichoke and fermented soybean powder mixture supplementation on blood glucose and oxidative stress in subjects with prediabetes or newly diagnosed type 2 diabetes.

ABSTRACT:

Background/objectives

The objective of this study was to evaluate the effect of supplementation with a Jerusalem artichoke and fermented soybean powder mixture on blood glucose and oxidative stress levels.

Subjects/methods

This randomized, double-blinded, placebo-controlled study was conducted on 60 subjects with impaired fasting glucose (IFG), impaired glucose tolerance (IGT), or newly diagnosed type 2 diabetes. The subjects were randomly assigned to either a group that ingested 40 g of a Jerusalem artichoke and fermented soybean powder mixture (19.45 g each) daily or a group that received a placebo for 12 weeks. Paired t-test and independent t-test were performed for comparisons within groups and between groups, respectively.

Results

Supplementation with the Jerusalem artichoke and fermented soybean powder mixture reduced the levels of fasting glucose (p < 0.001) and FFAs (p = 0.034), glucose at 60 min (p = 0.004), glucose (p = 0.006) areas under the response curve (AUC), homeostasis model assessment-insulin resistance (p = 0.018), and the urinary 8-epi-prostaglandin F_2α (8-epi-PGF_2α) level (p = 0.028). The changes (Δ) in urinary 8-epi-PGF_2α, glucose at 60 min, 120 min, and AUC, FFAs at 0 min and AUC were significantly different between the two groups. In addition, Δ glucose at 120 min (r = 0.472, p = 0.027) and the Δ glucose AUC (r = 0.572, p = 0.005) were positively correlated with △ plasma malondialdehyde in the test group.

Conclusions

The consumption of a Jerusalem artichoke and fermented soybean powder mixture for 12 weeks was effective for reducing postprandial glucose and oxidative stress level, particularly 8-epi-PGF_2α, in subjects with IFG, IGT, or newly diagnosed type 2 diabetes.

SUBMITTER: Ahn HY

PROVIDER: S-EPMC6053428 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature

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Publications

The effects of Jerusalem artichoke and fermented soybean powder mixture supplementation on blood glucose and oxidative stress in subjects with prediabetes or newly diagnosed type 2 diabetes.

Ahn Hyeon Yeong HY Kim Minjoo M Seo Cho Rong CR Yoo Hye Jin HJ Lee Sang-Hyun SH Lee Jong Ho JH

Nutrition & diabetes 20180719 1

<h4>Background/objectives</h4>The objective of this study was to evaluate the effect of supplementation with a Jerusalem artichoke and fermented soybean powder mixture on blood glucose and oxidative stress levels.<h4>Subjects/methods</h4>This randomized, double-blinded, placebo-controlled study was conducted on 60 subjects with impaired fasting glucose (IFG), impaired glucose tolerance (IGT), or newly diagnosed type 2 diabetes. The subjects were randomly assigned to either a group that ingested ...[more]

PMID: 30026514

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Project description:Helianthus tuberosus L., known as the Jerusalem Artichoke, is a hexaploid plant species, adapted to low nutrient soils, that accumulates high levels of inulin in its tubers. Inulin is a fructose-based polysaccharide used either as dietary fiber or for the production of bioethanol. Key enzymes involved in inulin biosynthesis are well known. However, the gene networks underpinning tuber development and inulin accumulation in H. tuberous remain elusive. To fill this gap, we selected 6,365 ESTs from a H. tuberosus library to set up a microarray platform and record their expression across three tuber developmental stages, when rhizomes start enlarging (T0), at maximum tuber elongation rate (T3) and at tuber physiological maturity (Tm), in “VR” and “K8-HS142”clones. The former was selected as an early tuberizing, the latter as a late-tuberizing clone. We quantified inulin and starch levels, and q-RT PCR confirmed the expression of key genes accounting for inulin biosynthesis. The microarray analysis revealed that the differences in morphological and physiological traits between tubers of the two clones are genetically determined since T0 and that is relatively low the number of differentially expressed ESTs across the stages shared between the clones (93). The expression of ESTs for sucrose:sucrose 1-fructosyltransferase (1-SST) and fructan:fructan 1-fructosyltransferase (1-FFT), the two critical genes for fructans polymerization, resulted to be temporarily synchronized and mirror the progress of inulin accumulation and stretching. The expression of ESTs for starch biosynthesis was insignificant throughout the developmental stages of the clones in line with the negligible level of starch into their mature tubers, where inulin was the dominant polysaccharide. Overall, our study disclosed candidate genes underpinning the development and storage of carbohydrates in the tubers of two H. tuberosus clones. A model according to which the steady state levels of 1-SST and 1-FFT transcripts are developmentally controlled and might represent a limiting factor for inulin accumulation has been provided. Our finding may have significant repercussions for breeding clones with improved levels of inulin for food and chemical industry.

Dataset Information

The effects of Jerusalem artichoke and fermented soybean powder mixture supplementation on blood glucose and oxidative stress in subjects with prediabetes or newly diagnosed type 2 diabetes.

Background/objectives

Subjects/methods

Results

Conclusions

Publications

The effects of Jerusalem artichoke and fermented soybean powder mixture supplementation on blood glucose and oxidative stress in subjects with prediabetes or newly diagnosed type 2 diabetes.

Similar Datasets

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