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Up-regulation of spermidine-spermine N1-acetyltransferase [SSAT] expression is a part of proliferative but not anabolic response of mouse kidney

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Dudkowska M., Stachurska A., Grzelakowska-Sztabert B., Manteuffel-Cymborowska M.

Acta Biochimica Polonica

2002

tom 49

nr 4

A differential expression pattern of spermidine/spermine N1-acetyltransferase (SSAT), the enzyme critical to proper homeostasis of cellular polyamines, is reported in mouse kidney undergoing hyperplasia and hypertrophy. We have shown that SSAT activity and SSAT mRNA are significantly induced by antifolate CB 3717 and folate that evoke a drug-injury-dependent hyperplasia. In contrast, SSAT activity is down-regulated in the testosterone-induced hypertrophic kidney, while SSAT mRNA is positively controlled by this androgen. Catecholamine depletion evoked by reser- pine drastically decreases the folate-induced activity of «S-adenosylmethionine decar- boxylase (AdoMetDC), which limits polyamine biosynthesis, but has no effect on SSAT activity augmented by CB 3717. Our results document that the increased SSAT expression solely accompanies the proliferative response of mouse kidney, and suggest the importance of post-transcriptional regulation to the control of SSAT activity in both hyperplastic and hypertrophic experimental models.

Ograniczanie wyników

1 Acta Biochimica Polonica

1 Dudkowska M.

1 Grzelakowska-Sztabert B.

1 Manteuffel-Cymborowska M.

1 Stachurska A.

1 2002

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Up-regulation of spermidine-spermine N1-acetyltransferase [SSAT] expression is a part of proliferative but not anabolic response of mouse kidney