Premium
Radiosynthesis, biodistribution and scintigraphy of the 99m Tc‐Teicoplanin complex in artificially infected animal models
Author(s) -
Shah Syed Qaiser,
Khan Aakif Ullah,
Khan Muhammad Rafiullah
Publication year - 2011
Publication title -
journal of labelled compounds and radiopharmaceuticals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 47
eISSN - 1099-1344
pISSN - 0362-4803
DOI - 10.1002/jlcr.1834
Subject(s) - biodistribution , chemistry , tin , technetium , radiosynthesis , teicoplanin , radiochemistry , nuclear chemistry , staphylococcus aureus , in vitro , nuclear medicine , bacteria , biochemistry , positron emission tomography , vancomycin , medicine , genetics , organic chemistry , biology
Radiocomplexation of Teicoplanin (TIN), a new glycopeptide antibiotic with technetium‐99m, was investigated. The 99m Tc‐TIN complex was assessed for its radiochemical permanence, in vitro stability in serum, binding with methicillin‐resistant Staphylococcus aureus (MRSA), biodistribution in Model Rats (MRT) and for scintigraphic precision in Model Rabbit (MRB). Radiochemically, a stable 99m Tc‐TIN was observed with 98.90±0.50% yield and remained staunch more than 90% up to 120 min, by mixing TIN, 1.5 mg in 0.5 ml of saline with 2.5 mCi sodium pertechnetate and 150 µl of stannous chloride dihydrate at pH 5.4. The 99m Tc‐TIN was found stable in serum with an insignificant undesirable yield of free and unhydrolyzed technetium (5.25±0.10 and 13.5±0.14%, n = 10) up to 120 min of incubation. The 99m Tc‐TIN showed in vitro binding with MRSA in the range of 55–65%. The 99m Tc‐TIN showed almost six‐fold elevated uptake in the infected (IFT) muscle of the MRT as compared with the inflamed (IFM) and normal (NL) muscles. This higher uptake of the 99m Tc‐TIN in the IFT was scintigraphically confirmed after the whole body scanning of the MRB. The radiochemical eternalness with high yield, in vitro stability in serum, binding with MRSA, significant biodistribution performance, and scintigraphic precision posed the 99m Tc‐TIN, a new glycopeptide radiotracer for the infection imaging. Copyright © 2010 John Wiley & Sons, Ltd.