Ibrahim IT, El-Tawoosy M, Talaat HM. Labeling of tannic Acid with technetium-99m for diagnosis of stomach ulcer.
ISRN PHARMACEUTICS 2011;
2011:578570. [PMID:
22389852 PMCID:
PMC3263727 DOI:
10.5402/2011/578570]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Accepted: 06/08/2011] [Indexed: 11/23/2022]
Abstract
Tannic acid is a polyphenolic compound that could be labeled with technetium-99m. To produce about 90% yield of 99mTc-tannic acid in acidic media (pH), the conditions required were 150 μg tin chloride, 30 min reaction time, and 200 μg of the substrate. 99mTc-tannic was stable for 6 h. Oral biodistribution of 99mTc-tannic showed that it concentrated in the stomach ulcer to reach about 50% of the total injected dose at 1 h after orall administration. This concentration of 99mTc-tannic in stomach ulcer may be sufficient to radio-image the presence of ulcer in the stomach.
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