Title : Impact of Abcc2 (Mrp2) and Abcc3 (Mrp3) on the in vivo elimination of methotrexate and its main toxic metabolite 7-hydroxymethotrexate.

Pub. Date : 2008 Dec 15

PMID : 19088030






8 Functional Relationships(s)
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1 Impact of Abcc2 (Mrp2) and Abcc3 (Mrp3) on the in vivo elimination of methotrexate and its main toxic metabolite 7-hydroxymethotrexate. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus
2 The plasma AUCi.v.s of 7OH-MTX were 6.0-fold and 4.3-fold increased in Abcc2(-/-) and Abcc2;Abcc3(-/-) mice, respectively, leading to increased urinary excretion. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus
3 The plasma AUCi.v.s of 7OH-MTX were 6.0-fold and 4.3-fold increased in Abcc2(-/-) and Abcc2;Abcc3(-/-) mice, respectively, leading to increased urinary excretion. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus
4 The biliary excretion of 7OH-MTX was 5.8-fold reduced in Abcc2(-/-) but unchanged in Abcc2;Abcc3(-/-) mice. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus
5 7OH-MTX accumulated substantially in the liver of Abcc2(-/-) and especially Abcc2;Abcc3(-/-) mice. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus
6 7OH-MTX accumulated substantially in the liver of Abcc2(-/-) and especially Abcc2;Abcc3(-/-) mice. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus
7 CONCLUSIONS: Abcc2 is important for (biliary) excretion of MTX and its toxic metabolite 7OH-MTX. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus
8 When Abcc2 is absent, Abcc3 transports MTX and 7OH-MTX back from the liver into the circulation, leading to increased plasma levels and urinary excretion. 7-hydroxymethotrexate ATP-binding cassette, sub-family C (CFTR/MRP), member 2 Mus musculus