Protein Information

Name uroporphyrinogen decarboxylase
Synonyms PCT; UPD; URO D; UROD; Uroporphyrinogen III decarboxylase; Uroporphyrinogen decarboxylase; Uroporphyrinogen III decarboxylases; Uroporphyrinogen decarboxylases

Compound Information

Name piperonyl butoxide
CAS 5-[[2-(2-butoxyethoxy)ethoxy]methyl]-6-propyl-1,3-benzodioxole

Reference List

PubMed Abstract RScore(About this table)
6435605 Sinclair PR, Bement WJ, Bonkovsky HL, Sinclair JF: Inhibition of uroporphyrinogen decarboxylase by halogenated biphenyls in chick hepatocyte cultures. Biochem J. 1984 Sep 15;222(3):737-48.

Use of inhibitors of the P-450 and P-448 isoenzymes (SKF-525A, piperonyl butoxide and ellipticine) supported the concept that only the P-448 isoenzyme is involved in the inhibition of the decarboxylase by the halogenated biphenyls.
2(0,0,0,2) Details
3800966 Smith AG, Francis JE, Kay SJ, Greig JB, Stewart FP: Mechanistic studies of the inhibition of hepatic uroporphyrinogen decarboxylase in C57BL/10 mice by iron-hexachlorobenzene synergism. Biochem J. 1986 Sep 15;238(3):871-8.

Although, in further studies, total microsomal cytochrome P-450 content and ethoxyphenoxazone de-ethylase activity reached a peak a few days after dosing and had declined significantly at the time of maximum inhibition of the decarboxylase, additional treatment of HCB-dosed mice with a cytochrome P1-450 inducer, beta-naphthoflavone, enhanced the inhibition, whereas piperonyl butoxide, an inhibitor of cytochrome P-450, partially protected.
2(0,0,0,2) Details
3026315 Sinclair PR, Bement WJ, Bonkovsky HL, Lambrecht RW, Frezza JE, Sinclair JF, Urquhart AJ, Elder GH: Uroporphyrin accumulation produced by halogenated biphenyls in chick-embryo hepatocytes. Biochem J. 1986 Jul 1;237(1):63-71.

We conclude that the mechanism of the uroporphyrin accumulation cannot be due to covalent binding of activated metabolites of halogenated compounds to uroporphyrinogen decarboxylase.
Reversal of the accumulation by piperonyl butoxide..
1(0,0,0,1) Details
2759551 Bonkovsky HL: Mechanism of iron potentiation of hepatic uroporphyria: studies in cultured chick embryo liver cells. Hepatology. 1989 Sep;10(3):354-64.

Uroporphyrinogen decarboxylase activity was unchanged by drug and iron treatments.
Inhibitors of P-450-phenobarbital, SKF525A and piperonyl butoxide, as well as cadmium and cycloheximide prevented the porphyrin accumulation produced by glutethimide + iron, even though, except with cycloheximide, these substances further increased 5-aminolevulinate synthase activity.
1(0,0,0,1) Details
7233443 Debets FM, Reinders JH, Debets AJ, Lossbroek TG, Strik JJ, Koss G: Biotransformation and porphyringogenic action of hexachlorobenzene and its metabolites in a primary liver cell culture. Toxicology. 1981;19(3):185-96.

Addition of the monooxygenase-inhibitor piperonyl butoxide or ascorbic acid decreased the irreversible binding of 14C-metabolites.
Since none of the main HCB-metabolites could induce a pathological porphyrin pattern, a reactive intermediate capable of reacting with glutathione or thiol-groups of uroporphyrinogen decarboxylase (UROG-D) is believed to be responsible for the inhibition of UROG-D.
1(0,0,0,1) Details
3718476 Sinclair JF, Zaitlin LM, Smith EL, Howell SK, Bonkovsky HL, Sinclair PR: Induction of 5-aminolaevulinate synthase by two- to five-carbon alcohols in cultured chick-embryo hepatocytes. Biochem J. 1986 Mar 1;234(2):405-11.


In the presence of 3,4,3',4'-tetrachlorobiphenyl, an inhibitor of haem synthesis at the uroporphyrinogen decarboxylase step, synergistic induction of 5-aminolaevulinate synthase was observed with all the alcohols except ethanol.
1(0,0,0,1) Details