نتایج جستجو برای: hynic
تعداد نتایج: 217 فیلتر نتایج به سال:
سابقه و هدف: بومبزین یک پپتید 14 اسیدآمینه ای با فعالیت بیولوژیکی زیاد است که تمایل بالا به گیرنده های grp دارد.گیرنده های grp در تومورهای بدخیم مختلفی ازقبیل پروستات وسینه به میزان بالا بیان می شود. هدف از این مطالعه آماده کردن[hynic-(gly)3-d-phe13-]bombesin(7-14) بوده است که بتواند به آسانی با 99mtc نشان دار شود و به عنوان یک عامل بالقوه تصویربرداری برای تومورهای دارای گیرنده grp ارزیابی گردد...
context inherited and sporadic medullary thyroid cancer (mtc) is an uncommon and medically challenging malignancy. even if the extent of initial surgery is deemed adequate, the recurrence rate remains high, up to 50% in most series. measurement of serum calcitonin is important in the follow-up of patients with mtc, and reliably reflects the existence of the disease. evidence acquisition there i...
Background and purpose: Over-expression of GRP receptors for Bombesin has been reported to be found in malignant tissues, especially in prostate cancer. Here, we aimed at radiochemical and stability evaluation of a new bombesin derivative labeled with 99mTc via HYNIC as a chelating agent and Tricine/EDDA as coligands that might be used for diagnosis of prostate cancer. Materials and methods:...
Neurokinin 1 receptors (NK1R) are overexpressed on several types of important human cancer cells. Substance P (SP) is the most specific endogenous ligand known for NK1Rs. Accordingly,a new SP analogue was synthesized and evaluated for detection of NK1R positive tumors.[6-hydrazinopyridine-3-carboxylic acid (HYNIC)-Tyr(8)-Met(O)(11)-SP] was synthesized and radiolabeled with (99m)Tc using ethylen...
Aims To investigate the association between angiogenetic activity of hyperplastic thymus and serum thyroglobulin (Tg) level in differentiated thyroid carcinoma patients with thyroglobulin (Tg)-elevated Negative Iodine Scintigraphy (TENIS) Syndrome. Methods A cohort of 30 consecutive patients who underwent total thyroidectomy followed by radioiodine ablation and had TENIS syndrome received int...
A 43-year-old man was admitted to Surgery Department because of abdominal pain, vomiting, weight loss and flushes. Computed tomography (CT) examination revealed upper and middle abdomen tumor of about 110 × 110 mm. Histopathological analysis of the tissues obtained during the exploratory laparotomy confirmed WDNT (well-differentiated neuroendocrine tumor according to the WHO classification 2000...
INTRODUCTION The aim of this study was to assess the utility of [Lys40(Ahx-HYNIC-99mTc/EDDA)NH2]-exendin-4 scintigraphy in the management of patients with hypoglycemia, particularly in the detection of occult insulinoma. MATERIALS AND METHODS Forty patients with hypoglycemia and increased/confusing results of serum insulin and C-peptide concentration and negative/inconclusive results of other...
The basic chemical structure of most prostate specific membrane antigen (PSMA) inhibitors which are now in pre-clinical and clinical studies is Glu-Ureido-based peptides. Synthesis of urea-based PSMA inhibitors includes two steps: 1- isocyanate intermediate formation and 2- urea bond formation. In current methods, isocyanate is formed in liquid phase and then reacts with amine existing in liqui...
The basic chemical structure of most prostate specific membrane antigen (PSMA) inhibitors which are now in pre-clinical and clinical studies is Glu-Ureido-based peptides. Synthesis of urea-based PSMA inhibitors includes two steps: 1- isocyanate intermediate formation and 2- urea bond formation. In current methods, isocyanate is formed in liquid phase and then reacts with amine existing in liqui...
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