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High-Dose vitamin D3 does not provide benefit for metastatic colorectal cancer

High-Dose vitamin D3 does not provide benefit for metastatic colorectal cancer
2024-09-15
(Press-News.org) RESEARCH SUMMARY

Study Title: SOLARIS (Alliance A021703): A multicenter double-blind phase III randomized clinical trial of vitamin D combined with standard chemotherapy plus bevacizumab in patients with previously untreated metastatic colorectal cancer.

Publication: European Society for Medical Oncology 2024 Abstract LBA26

Dana-Farber Cancer Institute authors: Kimmie Ng, MD, MPH, Nadine McCleary, MD, MPH, Jeffrey A. Meyerhardt, MD, MPH

Summary: A double-blind randomized phase 3 clinical trial led by Dana-Farber Cancer Institute researchers and conducted across several hundred cancer centers in the U.S. tested the addition of high-dose vitamin D3 to standard treatment for patients with untreated metastatic colorectal cancer. More than 450 patients received standard chemotherapy plus bevacizumab and were randomized to high-dose or standard dose vitamin D3. The team observed no additional concerning side-effects or toxicities with the addition of high-dose vitamin D3. However, the addition of high-dose vitamin D3 to standard treatment did not delay the progression of cancer more so than standard-dose vitamin D3, according to the team’s analysis after a median 20-month follow up. A potential benefit for high-dose vitamin D3 was observed for patients with left-sided disease (i.e., primary tumors that arise in the descending colon, sigmoid colon, or rectum) and requires further investigation.

Significance: The SOLARIS trial was inspired by previous research suggesting that higher levels of vitamin D in the blood are associated with improved survival for metastatic colorectal cancer and that the addition of high-dose vitamin D3 to standard therapy could potentially improve progression free survival. The SOLARIS results suggest, however, that high-dose vitamin D3 cannot be recommended as a treatment for patients with untreated metastatic colon cancer.

Funding: National Cancer Institute; Pharmavite

Contact:  Victoria Warren, victoria_warren@dfci.harvard.edu

END

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High-Dose vitamin D3 does not provide benefit for metastatic colorectal cancer

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[Press-News.org] High-Dose vitamin D3 does not provide benefit for metastatic colorectal cancer