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Updated: Aug 14, 2026

The CYP2D6 Animal Model: How to Induce Autoimmune Hepatitis in Mice
Published on: February 3, 2012
[Reciprocal effect of cyclophosphane on the liver cytochrome P-450 and immunity system]
Abstract:
It has been demonstrated in experiments on mice that administration of cyclophosphamide in a dose of 50 mg/kg for 3 days provokes marked induction of liver cytochrome P-450. However, 5 days after completing cyclophosphamide administration the induction is replaced by inhibition. A similar action under analogous conditions is produced by 3-methylcholanthrene which is widely used as an inductor of cytochrome P-450. The induction of liver cytochrome P-450 by cyclophosphamide or 3-methylcholanthrene is accompanied by pronounced inhibition of immunoreactivity. The known inductor phenobarbital does not produce any reciprocal action. Apparently, the reciprocal action of cyclophosphamide and 3-methylcholanthrene on cytochrome P-450 and immunity is a consequence of intense formation with the involvement of cytochrome P-450 of highly reactive metabolites interfering with the function of immunocompetent cells.
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