Abstract
Wheat, barley or wheat + barley and herbs (Terminalia chebula, Terminalia bellerica and Emblica officinalis) based low-glycemic-index (low-GI) foods were developed and studied α-amylase, α-glucosidase and DPP-IV inhibition property in vitro and in the streptozotocin-induced diabetic rats. The GI of products ranged from 47 to 53 than control white bread (GI = 95). Total phenolic (20.1 ± 1 mg gallic acid/g dry wt.) and flavonoids (15.2 ± 1 mg quercetin/g dry wt.) were higher in wheat + barley than barley (17.2 ± 1; 13.6 ± 2) and wheat (16.9 ± 1; 14.9 ± 2) products. The in vitro α-amylase (4–10%), α-glucosidase (5–17%) and DPP-IV (3–26%) inhibition (IC50) of methanol extracts were higher than the aqueous extracts. The fasting blood glucose (50.85, 33.22 and 24.52%) and oral glucose tolerance (AUC = 32.1, 36.04, and 27.73%) was lower in barley, wheat, and wheat + barley fed diabetic groups than diabetic control group (1571.5 ± 13.5 mg/dL/120 min). Feeding wheat, barley, and W + B foods for 60 days inhibited the intestinal α-amylase (1.2, 1.1 and 1.5-folds), α-glucosidase (1.3, 1.2 and 1.7-folds) and DPP-IV (1.6, 1.5 and 2.1-folds) activity compared to diabetic control. Low-GI foods lower the systemic glucose level, inhibit the glycolytic enzymes and DPP-IV activity and hence desirable for diabetes management.





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- DM:
-
Diabetes mellitus
- GI:
-
Glycemic index
- DPP-IV:
-
Dipeptidyl peptidase-4
- DPPH:
-
2,2-Diphenyl-1-picrylhydrazyl; di(phenyl)-(2,4,6-trinitrophenyl) iminoazanium)
- OGTT:
-
Oral glucose tolerance test
- EGI:
-
Estimated glycemic Index
- W + B:
-
Wheat + barley product
- HI:
-
Hydrolysis index
- UV:
-
Ultra violate
- MS:
-
Mass spectroscopy
- UHPLC:
-
Ultra high performance liquid chromatography
- HRMS:
-
High resolution mass spectroscopy
- APCI:
-
Atmospheric pressure chemical ionization
- AUC:
-
Area under curve
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Acknowledgements
The authors are grateful to Dr. N. S. Mahendrakar, Ex-chief editor, Journal of Food Science and Technology, for editing the manuscript for its English language.
Funding
Arpita Das acknowledges the University Grant Commission (UGC), Government of India, for financial assistance (Award No. 1108/(SC) (NET-JULY 2016).
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AD: Formal analysis, investigation, methodology, writing of original draft; NJ: Methodology, validation, visualization, review and editing. YNS: Validation, data curation, visualization; BSGK: Validation, data curation. VB: Project administration, supervision, resources, writing—review and editing, conceptualization, validation, visualization.
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The rats were all treated in strict accordance with Committee for Control and Supervision of Experiments on Animals (CPCSEA) and Institutional Animal Ethics Committee (IAEC No. 122/2018) of CSIR-CFTRI guidelines for the care and use of laboratory animals.
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Das, A., Naveen, J., Sreerama, Y.N. et al. Low-glycemic foods with wheat, barley and herbs (Terminalia chebula, Terminalia bellerica and Emblica officinalis) inhibit α-amylase, α-glucosidase and DPP-IV activity in high fat and low dose streptozotocin-induced diabetic rat. J Food Sci Technol 59, 2177–2188 (2022). https://doi.org/10.1007/s13197-021-05231-0
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DOI: https://doi.org/10.1007/s13197-021-05231-0

