Tricarbonyl technetium(I) complexes with different phosphate ligands

The possibilities for labelling of different phosphate ligands with technetium-99m through [99m Tc(CO)3(H2O)3] + precursor were investigated. The HPLC results have shown that hydrophilic organometallic [ 99mTc(CO)3(H2O)3] + precursor allows forming of Tc (I) complexes with different phosphate ligands, based on the tricarbonyltechnetium (I) core.Physical chemistry 2004 : 7th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 21-23 September 200

99mTc-hexakis-(2-metoxy-isobutyl-isonitrile) ( 99mTc-MIBI) a new myocardial imaging agent: synthesis of MIBI, optimising conditions for radiolabelling with 99mTc at high radiochemical purity and in vivo behavior

99mTc-MIBI is a promising radiopharmaceutical for myocardial perfusion imaging agent, but it has also shown good results in identifying several types of tumors, such as breast, lung and thyroid cancers. It is a lipophilic, cationic technetium (1) complex. In this paper a complete study on the synthesis of 2-metohy-isobutyl-isonitrile (MIBI) as well as a formulation of a lyophilized kit for labeling with 99mTc is presented. Investigation on effective factors as well as finding out the optimum parameters to obtain the highest labelling efficiency and radiochemical purity of 99mTc-MIBI complex were performed. The radiochemical purity of the labelled preparation was high (>95%). Biodistribution study performed in health male Wistar rats showed satisfactory biokinetics results. 99mTc-MIBI was accumulated in sufficient amount into the hearth tissue for myocardial perfusion imaging. MIBI in kit formulation was found to be stable and also safe for administration.Physical chemistry 2006 : 8th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 26-29 September 200

The activity of superoxide dismutase in the aqueous humour of the patients with senile cataract

Cataract is a dysfunction of the lens of the eye caused by clouding. By far the most common type of cataract is the senile cataract. The immediate cause of the occurrence of cataract is unknown, but oxidative stress is considered important in its etiopathogenesis. The aim: to examine the intensity of oxidative stress, depending on the type and maturity of senile cataract, through the activity of the superoxide dismutase enzyme (SOD) in the aqueous humor of the patients diagnosed with senile cataract. The average activity of the superoxide dismutase enzyme in the aqueous humor of the patients with early nuclear cataract was 41.16 U/mL, which is a significantly higher value (p<0.01) when compared with that of the patients with other types of early cataract, as well as with that of the patients with total cataract (33.88 U/mL). With aging the activity of the superoxide dismutase enzyme decreases, hence the average activity of the enzyme was significantly lower (p<0.05) in the group of patients over 75 years of age (36.28 U/mL vs. 28.91 U/mL)