Radioiodinated ganglioside GM1: a potential tool for the investigation of ganglioside function in vivo.

Ganglioside GM1 was labeled with 125I either directly or after conjugation to tyramine. Direct iodination of the sphingosine chain resulted in a compound which dehalogenated rapidly both in vitro and in vivo. The binding of the 125I[GM1-tyramine] conjugate to neuronal membranes in vitro was similar to that reported for 3H-GM1. The biodistribution of 125I activity after intravenous injection of 0.5 uM and 5 uM 125I[GM1-tyramine] in mice was also similar to that reported for 3H-GM1. This radioiodinated GM1 derivative might be useful for the study of ganglioside GM1 function in vivo.

Duke Scholars

Author Michael Rod Zalutsky Radiology