Major pathway for putrescine synthesis induced by 1 alpha,25-dihydroxyvitamin D3 in chick duodenum.
We have reported that a single injection of 1 alpha,25-dihydroxyvitamin D3 into vitamin D-deficient chicks produces a marked accumulation of putrescine in the duodenum by an interconversion pathway. In the present study, we examined the effect of N1,N2-bis(2,3-butadienyl)-1,4-butanediamine, a specific irreversible inhibitor of polyamine oxidase, on the duodenal putrescine synthesis induced by 1 alpha,25-dihydroxyvitamin D3. Addition of N1,N2-bis(2,3-butadienyl)-1,4-butanediamine to an assay mixture completely inhibited the activity of duodenal polyamine oxidase in vitro. Prior administration of N1,N2-bis(2,3-butadienyl)-1,4-butanediamine to chicks completely blocked the 1 alpha,25-dihydroxyvitamin D3-induced increase in duodenal accumulation of putrescine in vivo. The increase of the duodenal accumulation of putrescine by 1 alpha,25-dihydroxyvitamin D3 in vitamin D-deficient chicks coincided quantitatively with the amount of N1-acetylspermidine synthesized from spermidine after the injection of the vitamin into the chicks pretreated with the inhibitor of polyamine oxidase. These results clearly indicate that spermidine N1-acetyltransferase plays a preferential role in the increase in duodenal putrescine synthesis by 1 alpha,25-dihydroxyvitamin D3. The rapidly proliferating and maturing epithelium of small intestines will provide a good model for investigating the role of the interconversion of polyamine metabolism in cell growth and differentiation.
Shinki
T
T
Department of Biochemistry, School of Dentistry, Showa University, Tokyo, Japan.
Tanaka
H
H
Kadofuku
T
T
Sato
T
T
Suda
T
T
D000123:Acetyltransferases / Q000378:metabolism; D000818:Animals; D002117:Calcitriol / Q000494:pharmacology*; D002645:Chickens; D004386:Duodenum / Q000378:metabolism*; D066298:In Vitro Techniques; D008297:Male; D009952:Ornithine / Q000494:pharmacology; D009955:Ornithine Decarboxylase / Q000378:metabolism; D000587:Oxidoreductases Acting on CH-NH Group Donors / Q000037:antagonists & inhibitors / Q000378:metabolism; D011700:Putrescine / Q000031:analogs & derivatives / Q000096:biosynthesis* / Q000494:pharmacology; D013095:Spermidine / Q000031:analogs & derivatives / Q000494:pharmacology; D000097667:Polyamine Oxidase; D000099228:Diamine N-Acetyltransferase
D000123:Acetyltransferases; D002117:Calcitriol; D009952:Ornithine; D009955:Ornithine Decarboxylase; D000587:Oxidoreductases Acting on CH-NH Group Donors; D011700:Putrescine; D013095:Spermidine; D000097667:Polyamine Oxidase; D000099228:Diamine N-Acetyltransferase; C017988:N(1)-acetylspermidine; C044445:MDL 72527