Cited by 100Vitamin D Research StudiesSirtuins and Resveratrol in MedicineAdipokines, Inflammation, and Metabolic Diseases

Vitamin D supplementation improves SIRT1, Irisin, and glucose indices in overweight or obese type 2 diabetic patients: a double-blind randomized placebo-controlled clinical trial

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Safarpour, Peivasteh, Daneshi-Maskooni, Milad, Vafa, Mohammadreza, Nourbakhsh, Mitra, Janani, Leila, Maddah, Mohsen, Amiri, Fatemeh-Sadat, Mohammadi, Fereshteh +1 more·2020·BMC Family Practice

Abstract

Background: Vitamin D (VD) may increase sirtuin 1 (SIRT1) and subsequently PPAR-γ coactivator 1α (PGC-1α) and irisin levels and these improvements may reduce insulin resistance (IR). The aim was to assess the effects of vitamin D supplementation on SIRT1, irisin, and IR in overweight/obese type 2 diabetes (T2D) patients. Methods: Ninety T2D males and females were recruited as a clinical trial study (mean of age and body mass index (BMI) of intervention and placebo groups were 50.05 ± 10.17 and 50.36 ± 10.2 yrs. and 31.37 ± 3.4 and 30.43 ± 3.2 kg/m 2, respectively). The inclusion criteria were T2D, VD deficient, BMI > 25 kg/m 2, and serum HbA1c < 8.5%. The exclusion criteria were using vitamin and mineral supplements, having any acute disease, recent modifying dose or type of drugs. The supplementation was 50,000 IU/week VD or placebo for 8 weeks. The demographic characteristics, anthropometrics, dietary intakes and physical activity status, sun exposure status, fasting blood sugar (FBS) and insulin, glycosylated hemoglobin (HbA1c), irisin, SIRT1, 25-hydroxy D3 (25(OH)VD), homeostasis model assessment of insulin resistance (HOMA-IR), and quantitative insulin sensitivity check index (QUICKI) were determined. The significant P-value was ≤0.05. Results: The increase of serum VD, SIRT1, and irisin in the intervention group was significant (p < 0.001). HbA1c was decreased significantly by 1%. The changes in the other glucose indices (FBS, insulin, and IR) were non-significant. Conclusions: VD supplementation may improve T2D by decreasing HbA1c and increasing SIRT1 and irisin in VD deficient T2D patients. Further trials are suggested. Trial registration: Iranian Registry of Clinical Trials, IRCT201604202365N11. Registered 21/08/2016,http://en.irct.ir/trial/2019.

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  • Traditional exogenous antioxidants and compounds with antioxidant properties reduce oxidative stress but have limited cellular uptake and do not accumulate where needed.

    “Traditional exogenous antioxidants (for example, vitamins E, C and D), as well as chemical compounds with described antioxidants properties (for example, coenzyme Q, α-lipoic acid and N-acetylcysteine), have been used to reduce oxidative stress279,280, but their cellular uptake is limited and they do not accumulate where needed281.”

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Authors
Safarpour, P., Daneshi-Maskooni, M., Vafa, M., Nourbakhsh, M., Janani, L., Maddah, M., Amiri, F.-S., Mohammadi, F., & Sadeghi, H.
Affiliations
  • Iran University of Medical Sciences (IR)
  • Guilan University of Medical Sciences (IR)
  • University of Massachusetts Lowell (US)
Corresponding author
Vafa, Mohammadreza
Venue
BMC Family Practice
Published
2020-02-07
Volume
21
Issue
1
Pages
26-26
ISSN
1471-2296 (ISSN-L)
OpenAlex
W3009201497
Cited by
100
References
56
Citations by year
2026: 10 · 2025: 9 · 2024: 20 · 2023: 20 · 2022: 24 · 2021: 12 · 2020: 4
FWCI
9.83
Type
journal article
Language
en
Open access
Locations
  • BMC Family Practice (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Research Information System of Ardabil University of Medical Sciences (Ardabil University of Medical Sciences) (submittedVersion)
Funders
Iran University of Medical Sciences (1395.9223475201)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Vitamin D Research Studies
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
vitamin D supplementation, type 2 diabetes, SIRT1, irisin, insulin resistance, obesity, overweight, HbA1c, 25-hydroxyvitamin D, PGC-1α, glucose metabolism, vitamin D deficiency, glycemic control, QUICKI, HOMA-IR, fasting insulin, fasting blood glucose, sun exposure, physical activity, dietary intake
MeSH terms
Adult, Blood Glucose, Calcifediol, Diabetes Mellitus, Type 2, Double-Blind Method, Female, Fibronectins, Glyburide, Glycated Hemoglobin, Humans, Hypoglycemic Agents, Insulin, Insulin Resistance, Iran, Male, Metformin, Middle Aged, Obesity, Vitamin D Deficiency, Treatment Outcome, Overweight, Sirtuin 1

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