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Cervical lesions (precancerous, identified by pap smear) treated by bi-weekly 50,000 IU of vitamin D – RCT Feb 2017

Effects of Long-Term Vitamin D Supplementation on Regression and Metabolic Status of Cervical Intraepithelial Neoplasia: a Randomized, Double-Blind, Placebo-Controlled Trial.

Horm Cancer. 2017 Feb;8(1):58-67. doi: 10.1007/s12672-016-0278-x. Epub 2017 Jan 3.

VitaminDWiki Summary

Randomized Controlled Trial lasted 6 months

  • “Cervical intraepithelial neoplasia grade 1”
    decreased 85% vs 54% for women not getting vitamin D
  • Other benefits included: insulin, nitric oxide, athiglutone (GSH) and MDA

See also PubMed

Vahedpoor Z1, Jamilian M2, Bahmani F3, Aghadavod E3, Karamali M4, Kashanian M4, Asemi Z5.

  • 1 Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, I.R, Iran.
  • 2 Endocrinology and Metabolism Research Center, Department of Gynecology and Obstetrics, School of Medicine, Arak University of Medical Sciences, Arak, Iran.
  • 3 Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, I.R, Iran.
  • 4 Department of Gynecology and Obstetrics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
  • 5 Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, I.R, Iran. asemi_r at yahoo.com.

We are not aware of any study examining the effects of long term vitamin D administration on regression and metabolic status of patients with cervical intraepithelial neoplasia grade 1 (CIN1). This study was performed to evaluate the effects of long-term vitamin D administration on regression and metabolic status of patients with CIN1. This randomized, double-blind, placebo-controlled trial was performed among 58 women diagnosed with CIN1. CIN1 diagnosis was performed based on specific diagnostic procedures of biopsy, pathological diagnosis, and colposcopy. Patients were randomly allocated into two groups to take 50,000 IU vitamin D3 supplements (n = 29) or placebo (n = 29) every 2 weeks for 6 months. Fasting blood samples were taken at the beginning of the study and end-of-trial to measure related markers. After 6 months of vitamin D administration, greater percentage of women in the vitamin D group had regressed CIN1 (84.6 vs. 53.8%, P = 0.01) than those in the placebo group. Long-term vitamin D supplementation increased serum-25(OH) vitamin D levels in the intervention group compared to the placebo group (+12.3 ± 11.4 vs. -0.1 ± 3.7 ng/mL, P < 0.001).
In addition, vitamin D intake led to significant decreases in

  • serum insulin levels (-5.3 ± 7.3 vs. +2.4 ± 5.9 μIU/mL, P < 0.001),
  • homeostasis model of assessment-insulin resistance (-1.2 ± 1.6 vs. +0.5 ± 1.2, P < 0.001),
  • homeostatic model assessment-Beta cell function (P = 0.005) and a
  • significant elevation in quantitative insulin sensitivity check index (+0.03 ± 0.04 vs. -0.007 ± 0.02, P < 0.001) compared with the placebo group.

Additionally, significant increases in

  • plasma nitric oxide (NO) (+15.5 ± 10.3 vs. +4.0 ± 13.4 μmol/L, P = 0.001),
  • total antioxidant capacity (TAC) (P = 0.04),
  • total athiglutone (GSH) (+11.8 ± 153.5 vs. -294.2 ± 595.1 μmol/L, P = 0.01) and a
  • significant reduction in plasma malondialdehyde (MDA) levels (-0.8 ± 1.0 vs. -0.03 ± 1.4 μmol/L, P = 0.03)

were observed following the administration of vitamin D supplements compared with the placebo group.
In conclusion, vitamin D3 administration for 6 months among women with CIN1 resulted in its regression and had beneficial effects on markers of insulin metabolism, plasma NO, TAC, GSH and MDA levels.

Clinical trial registration number www.irct.ir : IRCT201412065623N30.
PMID: 28050798 [Indexed for MEDLINE]

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