SYNTHESIS BIODISTRIBUTION AND QSAR STUDIES OF FIVE Tc-99M LABELED NOVEL N3S PSEUDO-PEPTIDE COMPLEXES
作者:Hua-bei Zhang、Hai-hong Ye、Ya-ling Zhang、Xuefang Zheng、Jian-sheng Han、Hua Li、Chun-ping Liu
DOI:10.1007/s00044-004-0124-5
日期:2005.1
Five novel N3S pseudo-peptide chelators derived from mercaptoacetic acid have been synthesized and characterized based on the spectroscopic data. All the chelators were labeled with Technicium-99m to evaluate their biological activities. Investigations of their biodistribution in mice showed all five pseudo-peptide chelators (MGQ, MGGQ, MAGQ, MVGQ, MFGQ) are rapidly cleared from blood, mainly through renal clearance. Tc-99m-MGGQ and Tc-99m-MVGQ had high kidney uptake, quick blood clearance and high activity ratios of kidney to blood, thus showing potential application as renal imaging agents. Quantitative structure-activity relationship studies were performed. Linear regression analysis between the logarithm of renal uptake value (log%ID) and the parameters obtained from the ZINDO/1 method elicited several equations that possessed certain predictive qualities, and may play a direct part in drug design and synthesis.