به عنوان داديو داروي پپتيدي جديد جهت تصويربرداري از تومورهاي بارسپتور مثبت سوماتوستاتيني TC-EDDA/HYNIC-TOC تهيه فرمولاسيون و كنترل كيفي كيت يك مرحله اي

Preparation, formulation and quality control of one step kit99mTc- EDDAIHYNIC-Tyra-Octreotide as a peptide radiopharmaceutical for imaging somatostatin receptor positive tumors

The high expression of somatostatin receptors in many tumours, have made receptor scintigraphy with IIII In-DTPA-Octreolide a widely used procedure in nuclear medicine. Despite its clinical success, some limitation and drawbacks of radiolabelling with III In remain, especially those concerned with the cost, availability and physical decay properties of this radionuclide. 99mTc-EDDA/HYNIC-Ty-TOC was studied as a new agent with the potential to replace Octreoscan in somatostatin receptor scintigraphy. This hydrazinonicotinic acid derivatized somatostatin complex contains ethylenediamine N,N diacetic acid ( EDDA ) as a co-ligand resulting in a high in vitro and in vivo stability. High labeling yields ( >90% ) were achieved at high specific activities. Charactrization via HPLC, hiodislribution and receptor binding of the resulting complex are described. The formulation developed enables rapid and simple labeling of 99mTc-EDDA/IIYNICTOC in a manner suitable for clinical setting.