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Related Experiment Videos

111In (III) uptake by inflammatory and normal tissues.

Y Ohkubo1, K Abe, H Kohno

  • 1Department of Radiopharmacy, Tohoku College of Pharmacy, Sendai, Japan.

Annals of Nuclear Medicine
|November 1, 1989
PubMed
Summary

Indium-111 uptake in rat inflammatory tissues mirrors gallium-67. Transferrin is not involved in indium-111 uptake by inflammation, but aids uptake in the liver and spleen.

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Area of Science:

  • Nuclear medicine
  • Radiopharmaceutical research
  • In vivo imaging

Background:

  • Gallium-67 (67Ga) citrate is a widely used radiopharmaceutical for imaging inflammation and tumors.
  • Understanding the biodistribution and uptake mechanisms of other radiometals is crucial for developing new diagnostic agents.

Purpose of the Study:

  • To compare the tissue distribution of indium-111 (111In) with gallium-67 (67Ga) in an experimental model of inflammation.
  • To investigate the role of transferrin in the uptake of 111In by inflammatory tissues, liver, and spleen.

Main Methods:

  • Induction of inflammatory granuloma in rats using turpentine oil.
  • Administration of 111In (III) and 67Ga to rats.
  • Measurement of tissue distribution of both radiometals.

Related Experiment Videos

  • Competition studies using cold indium chloride (InCl3) to assess transferrin involvement.

    • Main Results:

    • Indium-111 exhibited similar tissue distribution patterns to 67Ga in both normal soft tissues and experimentally induced inflammatory sites.
    • Uptake of 111In (III) in inflammatory tissues was not significantly affected by the presence of cold InCl3, suggesting transferrin independence.
    • Cold InCl3 significantly reduced 111In (III) uptake in the liver and spleen, indicating transferrin-mediated uptake in these organs.

    Conclusions:

    • Indium-111 demonstrates comparable biodistribution to 67Ga in inflammatory conditions.
    • The uptake mechanism of 111In (III) in inflammatory tissues differs from that in the liver and spleen, with transferrin playing a role only in the latter.
    • These findings suggest potential for 111In-labeled compounds in inflammatory imaging, with distinct uptake pathways to consider.