Abstract
Some coauthors of this study previously performed the AMATERASU randomized, double-blind, placebo-controlled trial of postoperative oral vitamin D supplementation (2,000 IU/day) in 417 patients with stage I to III digestive tract cancer from the esophagus to the rectum who underwent curative surgery (UMIN000001977).
We conducted a post-hoc analysis of the AMATERASU trial to explore the effects of modification of vitamin D supplementation by histopathological characteristics on survival.
Among patients with poorly differentiated adenocarcinoma, the 5-year relapse-free survival rate of patients supplemented with vitamin D was 91% compared with 63% in the placebo group (hazard ratio [HR], 0.25; 95% confidence interval [CI], 0.08 to 0.78; P = 0.017; P for interaction = 0.023).
Similarly, the 5-year overall survival rate was 92% in the vitamin D group compared with 72% in the placebo group (HR, 0.25; 95%CI, 0.07 to 0.94; P = 0.040; P for interaction = 0.012). In contrast, there were no significant effects in other histopathological characteristics between vitamin D and placebo groups.
These findings generated the hypothesis that oral vitamin D supplementation may improve both relapse-free survival and overall survival in a subgroup of patients with poorly differentiated adenocarcinoma.
See also:
- Official Web Site: The Di Bella Method;
- The Di Bella Method (A Fixed Part - Dihydrotachysterol, Alfacalcidol, synthetic Vitamin D3);
- Vitamin D (analogues and/or derivatives) and cancer - In vitro, review and in vivo publications;
- The Di Bella Method (A Fixed Part - Calcium, 2 grams per day, orally);
- Oesophageal squamocellular carcinoma: a complete and objective response;
- Complete objective response to biological therapy of plurifocal breast carcinoma;
- Neuroblastoma: Complete objective response to biological treatment;
- Pancreatic Adenocarcinoma: clinical records on 17 patients treated with Di Bella's Method;