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Morphometric studies on treated and untreated heterotransplanted malignant tumours
1Bartholin Instituttet, Kommunehospitalet, Copenhagen, Denmark.
Summary
Short-term chemotherapy effects on bladder tumors were assessed using morphometric methods. This approach accurately estimated vital tumor tissue and cell numbers, revealing significant treatment impacts even before visible size changes.
Area of Science:
- Oncology
- Experimental Therapeutics
- Tumor Biology
Background:
- Assessing short-term anticancer treatment effects on heterotransplanted tumors is crucial but challenging due to edema and necrosis.
- Non-invasive methods like NMR have limitations due to background noise from host organisms.
- Accurate early assessment is vital for understanding treatment efficacy.
Purpose of the Study:
- To illustrate short-term chemotherapy effects on cisplatin-treated bladder carcinomas in nude mice.
- To apply unbiased morphometric methods for evaluating tumor response.
- To quantify changes in tumor volume and vital tissue before gross size alterations.
Main Methods:
- Utilized morphometric analysis on formalin-fixed, paraffin-embedded bladder carcinomas heterotransplanted to nude mice.
- Estimated whole tumor volume and vital tumor tissue volume on days 1 and 3 post-cisplatin treatment.
- Calculated tumor cell numbers using mean nuclear volume and nuclear volume fraction combined with vital tissue volume.
Main Results:
- Demonstrated pronounced short-term therapy effects of cisplatin on bladder carcinomas.
- Quantified significant changes in vital tumor tissue and cell numbers by day 3 post-treatment.
- Observed these effects despite no evident gross changes in overall tumor size.
Conclusions:
- Morphometric methods provide an unbiased estimate of short-term chemotherapy effects.
- This approach can reveal significant tumor response to treatment early on.
- The findings hold potential for monitoring therapeutic effects in clinical settings.