In vivo application of ( sup 111 In-DTPA-D-Phe sup 1 )-octreotide for detection of somatostatin receptor-positive tumors in rats

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Life Sciences; (United States)

DOI:https://doi.org/10.1016/0024-3205(91)90053-E· OSTI ID:5819846

Bakker, W H; Krenning, E P; Reubi, J C; Breeman, W A.P.; Setyono-Han, B; de Jong, M; Kooij, P P.M.; Bruns, C; van Hagen, P M; Marbach, P; Visser, T J; Pless, J; Lamberts, S W.J. ^[1]

---

1. Erasmus Univ., Rotterdam (Netherlands) Sandoz Research Inst., Berne (Switzerland) Dr. Daniel den Hoed Cancer Centre, Rotterdam (Netherlands) Sandoz Pharma AG, Basel (Switzerland)

In this study the authors investigated its in vivo application in the visualization of somatostatin receptor-positive tumors in rats. The distribution of the radiopharmaceutical was investigated after intravenous injection in normal rats and in rats bearing the somatostatin receptor-positive rat pancreatic carcinoma CA 20948. Ex vivo autoradiographic studies showed that specific accumulation of radioactivity occurred in somatostatin receptor-containing tissue (anterior pituitary gland). However, in contrast to the adrenals and pituitary, the tracer accumulation in the kidneys was not mediated by somatostatin receptors. Increasing radioactivity over the somatostatin receptor-positive tumors was measured rapidly after injection and the tumors were clearly visualized by gamma camera scintigraphy. In rats pretreated with 1 mg octreotide accumulation of ({sup 111}In-DPTA-D-Phe{sup 1})-octreotide in the tumors was prevented. Because of its relatively long effective half-life, ({sup 111}In-DTPA-D-Phe{sup 1})-octreotide is a radionuclide-coupled somatostatin analogue which can be used to visualize somatostatin receptor-bearing tumors efficiently after 24 hr, when interfering background radioactivity is minimized by renal clearance.

• OSTI ID: 5819846
• Journal Information: Life Sciences; (United States), Vol. 49:22; ISSN 0024-3205
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
EXPERIMENTAL NEOPLASMS
DIAGNOSIS
PANCREAS
CARCINOMAS
RADIOPHARMACEUTICALS
DIAGNOSTIC USES
SOMATOSTATIN
RECEPTORS
AUTORADIOGRAPHY
BIOLOGICAL HALF-LIFE
INDIUM 111
RATS
SCINTISCANNING
TISSUE DISTRIBUTION
ANIMALS
BETA DECAY RADIOISOTOPES
BODY
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
DIGESTIVE SYSTEM
DISEASES
DISTRIBUTION
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
ENDOCRINE GLANDS
GLANDS
INDIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LABELLED COMPOUNDS
MAMMALS
MEMBRANE PROTEINS
MINUTES LIVING RADIOISOTOPES
NEOPLASMS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANS
PROTEINS
RADIOISOTOPE SCANNING
RADIOISOTOPES
RODENTS
USES
VERTEBRATES
550601* - Medicine- Unsealed Radionuclides in Diagnostics