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de Sales Guilarducci J, Marcelino BAR, Konig IFM, et al. Therapeutic effects of different doses of prebiotic (isolated from S. Diabetol Metab Syndr. 2020;12:69doi: 10.1186/s13098-020-00576-6.
de Sales Guilarducci, J., Marcelino, B. A. R., Konig, I. F. M., Orlando, T. M., Varaschin, M. S., & Pereira, L. J. (2020). Therapeutic effects of different doses of prebiotic (isolated from S. Diabetology & metabolic syndrome, 1269. https://doi.org/10.1186/s13098-020-00576-6
de Sales Guilarducci, Janina, et al. "Therapeutic effects of different doses of prebiotic (isolated from S." Diabetology & metabolic syndrome vol. 12 (2020): 69. doi: https://doi.org/10.1186/s13098-020-00576-6
de Sales Guilarducci J, Marcelino BAR, Konig IFM, Orlando TM, Varaschin MS, Pereira LJ. Therapeutic effects of different doses of prebiotic (isolated from S. Diabetol Metab Syndr. 2020 Aug 10;12:69. doi: 10.1186/s13098-020-00576-6. eCollection 2020. PMID: 32793305; PMCID: PMC7418400.
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Diabetol Metab Syndr. 2020 Aug 10;12:69. doi: 10.1186/s13098-020-00576-6. eCollection 2020.

Therapeutic effects of different doses of prebiotic (isolated from S.

Diabetology & metabolic syndrome

Janina de Sales Guilarducci, Breno Augusto Ribeiro Marcelino, Isaac Filipe Moreira Konig, Tamira Maria Orlando, Mary Suzan Varaschin, Luciano José Pereira

Affiliations

  1. Departamento de Ciências da Saúde - DSA, Universidade Federal de Lavras - UFLA, 3037, Lavras, 37200-000 Brazil.
  2. Departamente de Medicina Veterinária - DMV, Universidade Federal de Lavras - UFLA, 3037, Lavras, 37200-000 Brazil.

PMID: 32793305 PMCID: PMC7418400 DOI: 10.1186/s13098-020-00576-6

Abstract

BACKGROUND: The regular intake of fiber generates numerous health benefits. However, the efficacy depends on the duration of consumption and the ingested dose. Studies investigating the optimal dose are of interest to enable the inclusion of fiber in the routine treatment of diabetic patients.

OBJECTIVE: We aimed to evaluate the effects of different doses of β-glucan (BG-isolated from

METHODS: Forty animals were randomly divided into six groups receiving 0 mg/kg, 10 mg/kg, 20 mg/kg, or 40 mg/kg BG daily for 4 weeks or fish oil derivative [1000 mg/kg of omega-3 fatty acids (n-3)] for the same period. One additional group was composed of healthy controls. Serum metabolic and immunological parameters were evaluated by colorimetric and ELISA assays respectively. Histopathological analysis of the liver, small intestine and pancreas were also conducted. Significant changes due to BG intake were set into regression models with second-degree fit in order to estimate the optimal BG dose to achieve health benefits.

RESULTS: The animals that ingested BG had lower food and water intake (p < 0.05) than the negative control group (0 mg/kg). However, consumption was still elevated in comparison to healthy controls. Blood glucose and serum levels of total cholesterol, LDL-c, and TG (p < 0.05) reduced in comparison to diabetic animals without treatment (better or similar to n-3 group depending on dose), but did not reach normal levels (in comparison to healthy controls). HDL-c was not different (p > 0.05) among all groups. These reductions were already seen with the lowest dose of 10 mg/kg. On average, the serum levels of the hepatic enzymes ALT and AST were 40% and 60% lower in the BG groups in comparison to diabetic animals without treatment (better results than n-3 group). The group receiving 40 mg/kg reached similar values of healthy controls for ALT; whereas the same result occurred from the dose of 10 mg/kg for AST. The ideal dose, estimated from the mean of all metabolic parameters was approximately 30 mg/kg/day. Regarding the immunological profile, TNF-α significantly decreased in the BG groups compared to controls (p < 0.05), reaching better values than n-3 group and similar to healthy controls. No significant differences were found between the groups in IL-1β or IL-10 (p > 0.05). No histological changes were found in the pancreas, liver, or intestine due to treatment among diabetic animals.

CONCLUSIONS: BG significantly reduced blood glucose as well as serum total cholesterol, LDL-c and TG. There was a hepatoprotective effect due to the reduction in ALT and AST and a reduction in TNF-α, indicating a modulation of the immune response. In general, BG effects were better than n-3 supplement (or at least comparable) depending on the dose.

© The Author(s) 2020.

Keywords: Beta-glucans; Dietary fibers; Metabolism; Prebiotics

Conflict of interest statement

Competing interestsThe authors declare that they have no competing interests.

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