Distribution of Pimonidazole and RSU 1069 in Tumour and Normal Tissues
Author Information
Author(s): L.M. Cobb, J. Nolan, S.A. Butler
Primary Institution: MRC Radiobiology Unit, Harwell, Didcot, Oxfordshire OXII ORD, UK
Hypothesis
The study investigates whether the distribution of Pimonidazole and RSU 1069 in tissues is specific to hypoxic tumour cells or can also be observed in normal tissues.
Conclusion
The study found that metabolites of Pimonidazole and RSU 1069 accumulate in normal tissues at levels greater than in tumours.
Supporting Evidence
- The study showed significantly higher activity in liver, eyelid, oesophageal lining, kidney, and labial gland compared to the tumour.
- Both Pimonidazole and RSU 1069 were associated with high grain density in normal tissues.
- The findings suggest that high local reductase activity can lead to significant drug retention in normal tissues.
Takeaway
The researchers looked at how two drugs, Pimonidazole and RSU 1069, spread in mice with tumours and found that they stuck around in normal tissues more than in the tumours themselves.
Methodology
The study involved injecting tritium-labelled Pimonidazole and RSU 1069 into male C3H/He mice with KHT sarcoma and measuring the distribution of radioactivity in various tissues after 24 hours.
Limitations
The study measured tissue distribution at only one time point (24 hours), which may not reflect changes over time.
Participant Demographics
Male C3H/He mice aged 11-13 weeks.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
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