SYNTHESIS, QUALITY CONTROL AND BIODISTRIBUTION OF TECHNEIUM-99M TRIAMCINOLONE ACETONIDE (99mTc-TA) COMPLEX: AN INFLAMMATION TRACER AGENT
Author
Askari Rizvi, Faheem
Raza Naqvi, Syed Ali
Mehdi, Muhammad
Roohi, Samina
Fawad Zahoor, Ameer
Khan, Zulfiqar Ali
Sohaib, Muhammad
Rasheed, Rashid
Abstract
In present study synthesis of 99mTc-triamcinolone acetonide (99mTc-TA) complex and its stability using set of quality control parameters such as ligand concentration, reducing agent concentration, pH, temperature and reaction time was assessed. 99mTc-TA complex was characterized in terms of percent (%) yield, stability in saline and serum using chromatographic procedures. Radiochemically the 99mTc-TA complex was found quite stable in saline and serum. After 30 min of reaction the complex showed maximum radiochemical yield of 96.32% which decreased to 96.25 % after 4 h incubation period. In serum, the % yield of radiochemical was remained same up to 2 h which decreased to 93.5% at 24 h time point. Normal biodistribution pattern in Sprague-Dawley rats revealed liver, stomach and kidneys as areas of high 99mTc-TA complex uptake (8.44 ± 1.32, 8.75 ± 1.03 and 12.67 ± 1.21%, respectively) at 1 h post injection time point. Scintigraphy of 99mTc-TA in rabbits showed similar eco as observed in biodistribution study. Based on the promising results obtained in context of in vitro and in vivo stability and biodistribution, 99mTc-TA complex could be further studied to identify the inflammation based diseases.