Abstract Title:

Radioprotective effect of vitamin E on salivary glands after radioiodine therapy for differentiated thyroid cancer: a randomized-controlled trial.

Abstract Source:

Nucl Med Commun. 2017 Aug 11. Epub 2017 Aug 11. PMID: 28806348

Abstract Author(s):

Arun Upadhyaya, Pingping Zhou, Zhaowei Meng, Peng Wang, Guizhi Zhang, Qiang Jia, Jian Tan, Xue Li, Tianpeng Hu, Na Liu, Sen Wang, Xiaoxia Liu, Huiying Wang, Chunmei Zhang, Fengxiao Zhao, Ziyu Yan, Xiaoran Wang, Xuemeng Zhang, Wan Zhang

Article Affiliation:

Arun Upadhyaya


OBJECTIVES: This study aimed to examine the radioprotective effect of vitamin E on salivary glands after radioactive iodine (I) therapy in patients with differentiated thyroid cancer.

PATIENTS AND METHODS: Eighty-two patients with differentiated thyroid cancer were enrolled in this study. They were divided randomly into four groups (control group: 22 cases, group A: 23 cases, group B: 22 cases, and group C: 15 cases) before postsurgical ablation therapy with 100 mCi I. The patients in groups A, B, and C received vitamin E 100, 200, and 300 mg/day orally, respectively, for a duration of 1 week before to 4 weeks after I therapy. Salivary gland function was assessed using salivary gland scintigraphy immediately before and 6 months after I therapy. Uptakefraction (UF), uptake index (UI), excretion fraction (EF), and excretion ratio (ER) of each salivary gland were measured and compared.

RESULTS: On comparison between before and after I therapy in the control group, there was a significant decrease in UF of both right and left parotid glands (all P<0.01). In group A, a significant increase in EF of the right parotid gland (P<0.01) and UI of the right submandibular gland (P<0.05) was found. In group B, there was a significant increase in UI of the right parotid gland and both submandibular glands (all P<0.01). In group C, there was a significant increase in UF of the left parotid gland (P<0.05) and the right submandibular gland (P<0.01). Also, there was a statistical increase in UI in both submandibular glands (all P<0.01). However, on comparing the changes in the post-I therapy salivary scintigraphy parameters among the four groups, there was a significant difference inΔUI of the right parotid gland (P<0.05) and both submandibular glands (all P<0.01), as well asΔER of the left parotid gland (P<0.05) andΔUF of the left submandibular gland (P<0.05).

CONCLUSION: Vitamin E exerts significant protective effects on the parotid and submandibular glands after I therapy.

Study Type : Animal Study

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Sayer Ji
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