Methotrexate Enterotoxicity in Rats
Author Information
Author(s): C.R. Pinkerton, P.J. Milla
Primary Institution: Institute of Child Health, London
Hypothesis
Does methotrexate alter absorption in the absence of villus atrophy and what is the pattern of functional recovery after methotrexate-induced injury?
Conclusion
Methotrexate-induced malabsorption involves both cell toxicity and alterations in villus population dynamics, rather than just reduced villus surface area.
Supporting Evidence
- At the lowest dose of methotrexate, there was no significant difference in absorption compared to controls.
- After higher doses, sodium and water absorption were significantly reduced.
- Glucose absorption was less sensitive to methotrexate and only significantly reduced after the highest dose.
Takeaway
When rats were given methotrexate, it affected their ability to absorb nutrients, but they recovered over time, showing that the drug impacts both the cells and the structure of the intestine.
Methodology
The study involved administering varying doses of methotrexate to male Wistar rats and measuring the absorption of water, sodium, and glucose in the jejunum.
Limitations
The study was conducted on rats, which may not fully replicate human responses to methotrexate.
Participant Demographics
Male Wistar rats weighing 250-300g.
Statistical Information
P-Value
p<0.005, p<0.02
Statistical Significance
p<0.005
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