Crucial Role for Somatostatin Receptor Subtype 2 in Determining the Uptake of [111In-DTPA-D-Phe1]Octreotide in Somatostatin ReceptorPositive Organs
Leo J. Hofland, PhD1,
Steven W.J. Lamberts, PhD, MD1,
P. Martin van Hagen, PhD, MD1,
Jean-Claude Reubi, PhD, MD2,
James Schaeffer, PhD3,
Marlijn Waaijers1,
Peter M. van Koetsveld1,
Ananth Srinivasan, PhD4,
Eric P. Krenning, PhD, MD5 and
Wout A.P. Breeman, PhD5
1 Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
2 Division of Cell Biology and Experimental Cancer Research, Institute of Pathology, University of Bern, Bern, Switzerland
3 Merck Laboratories, New York, New York
4 Mallinckrodt Discovery, St. Louis, Missouri
5 Department of Nuclear Medicine, Erasmus Medical Center, Rotterdam, The Netherlands

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FIGURE 1. Expression of SS and sst15 mRNAs in different tissues of wild-type and sst2 knockout mice, as determined by RT-PCR. All mock-reverse-transcribed samples and all controls with no added template showed no PCR products. Marker lanes (M) contain 100-bp DNA ladder. H = hprt; Mw = molecular weight.
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FIGURE 2. Uptake values of radioactivity after injection of [111In-DTPA-D-Phe1]octreotide (A) and [111In-DTPA]SS-14 (B), expressed as percentage injected dose per gram of tissue (% ID/gram) in pituitary gland, adrenals, pancreas, and thymus of wild-type mice (white bars) and sst2 knockout mice (black bars) (n = 4).
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Copyright © 2003 by the Society of Nuclear Medicine.