Loading…

The effect of meralluride blocking on localization of radiochlormerodrin in a mouse brain tumor (Sarcoma)

As meralluride blocking is commonly used in brain tumor scanning with radiomercury chlormerodrin, and as the effect of this pretreatment on the localization of radiochlormerodrin in brain tumors is not known, we have studied the pharmacodynamics of radiochlormerodrin in a mouse brain tumor with and...

Full description

Saved in:
Bibliographic Details
Published in:The International journal of applied radiation and isotopes 1970-01, Vol.21 (12), p.711-718
Main Authors: Konikowski, T., Haynie, Thomas P.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:As meralluride blocking is commonly used in brain tumor scanning with radiomercury chlormerodrin, and as the effect of this pretreatment on the localization of radiochlormerodrin in brain tumors is not known, we have studied the pharmacodynamics of radiochlormerodrin in a mouse brain tumor with and without priot administration of meralluride. Tumor-bearing mice were injected with a constant dose of radioactive chlormerodrin and were pretreated with two dose levels (0·557 μg/g and 5·011 μg/g) of stable meralluride. At varying time intervals after injection of radioactivity, tissue samples were counted, and the degree of localization evaluated. The results reveal differences in mice receiving blocking doses of meralluride where a lesser tissue concentration of radiomercury was found than in mice not receiving blocking doses of meralluride. In addition, different intervals of maximum tumor to brain ratios were observed. Mice receiving blocking meralluride had maximum tumor to brain ratio 1–2 hr after injection, while mice not given stable mercury reached maximum tumor to brain ratios 3–5 hr after injection. The data are thought to have some bearing on selection of optimum scanning time in the clinical brain scanning situation. Puisque l'obstruction par méralluride s'emploie normalement dans le balayage des tumeurs de cervelle avec la chlormérodrine à radiomercure, et puisque l'effet de ce prétraitement sur la localisation de la radiochlormérodrine dans les tumeurs de cervelle est inconnu, nous avons étudié la pharmacodynamique de la radiochlormérodrine dans une tumeur de cervelle de souris avec et dans administration préalable de méralluride. Des souris portant des tumeurs furent injectées d'une dose constante de chlormérodrine radioactive et furent prétraitées de deux niveaux de dose (0·557 μg/g et 5·011 μg/g) de méralluride stable. A des périodes de temps variées des échantillons de tissu furent comptés et le degré de localisation fut évalué. Les résultats montrèrent des différences chez les souris qui recevaient des doses obstructives de méralluride où on trouva une moindre concentration en tissu de radiomercure que chez les souris qui ne recevaient pas de doses obstructives de méralluride. De plus, on observa de différents intervalles de maximum de proportion tumeur à cervelle. Les souris qui recevaient l'obstruction de méralluride avaient le maximum de cette proportion 1 à 2 hr après l'injection, tandis que les souris qui ne recevaient pas de mercure sta
ISSN:0020-708X
DOI:10.1016/0020-708X(70)90080-3