Inhibition of gallium-67 uptake in melanoma by an anti-human transferrin receptor monoclonal antibody
The effect of an anti-human transferrin receptor (anti-TFR) monoclonal antibody (MoAb), designated B3/25, and an anti-melanoma antibody, designated 96.5, on the uptake of gallium-67 (/sup 67/Ga) by tumor was studied. Three groups of six athymic mice bearing a human melanoma were injected via tail vein with (a) 0.55 mg human serum albumin (HSA) (control group), (b) 0.5 mg MoAb B3/25 + 0.55 mg HSA, and (c) 0.5 mg MoAb 96.5 + 0.55 mg HSA, respectively. Twenty-four hours later, each mouse was given an intravenous dose of 5 microCi (/sup 67/Ga) citrate. Biodistribution of activity (percent injected dose per gram) determined 48 hr after injection of /sup 67/Ga showed a 75% decrease in tumor uptake in the group of mice that received B3/25 (anti-TFR MoAb) compared with the control group. In contrast, MoAb 96.5 did not show any effect on melanoma uptake of /sup 67/Ga. Histologic findings suggest that the decreased uptake was not due to cellular damage resulting from binding of B3/25 to TFR. The results of this study strongly suggest the involvement of TFR in the in vivo tumor uptake of /sup 67/Ga.
- Research Organization:
- Yale Univ. School of Medicine, New Haven, CT
- OSTI ID:
- 6124724
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 28:8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GALLIUM 67
TISSUE DISTRIBUTION
MELANOMAS
DIAGNOSIS
EXPERIMENTAL NEOPLASMS
MICE
MONOCLONAL ANTIBODIES
TRANSFERRIN
ANIMALS
ANTIBODIES
BETA DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
DISEASES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
GALLIUM ISOTOPES
GLOBULINS
GLOBULINS-BETA
INTERMEDIATE MASS NUCLEI
ISOTOPES
MAMMALS
METALLOPROTEINS
NEOPLASMS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PROTEINS
RADIOISOTOPES
RODENTS
VERTEBRATES
550601* - Medicine- Unsealed Radionuclides in Diagnostics