Modulation of tissue-type plasminogen activator by retinoids in rat plasma and tissues

article



Bennekum, A.M. van

Emeis, J.J.

Kooistra, T.

Hendriks, H.F.J.
In this study the effect of vitamin A status and retinoid treatment on the activity of tissue-type plasminogen activator (TPA) and its inhibitor, plasminogen activator inhibitor-type 1 (PAI-1), in plasma and in several tissues was investigated in BN/BiRij rats. Hypervitaminosis A and retinoic acid treatment increased plasma TPA activity by ~50%, but PAI-1 activity was not affected. The effect of retinyl palmitate treatment on plasma TPA activity was already significant after 5 days and continued for at least up to 8 wk. Isotretinoin treatment affected neither plasma TPA nor PAI-1 activity. In plasma of vitamin A-deficient rats, TPA activity was decreased by a factor of three, whereas PAI-1 activity was increased twofold. Modulation of plasma TPA activity by vitamin A status and retinoic acid treatment was associated with similar changes in tissue TPA activity. This suggests that the changes in plasma TPA activities might be the result of changes in tissue TPA synthesis.
Chemicals/CAS: isotretinoin, 4759-48-2; plasminogen activator inhibitor 1, 140208-23-7; retinoic acid, 302-79-4; retinol palmitate, 79-81-2; tissue plasminogen activator, 105913-11-9; Antigens; Plasminogen Activator Inhibitor 1; Retinoids; Tissue Plasminogen Activator, EC 3.4.21.68; Urinary Plasminogen Activator, EC 3.4.21.73; von Willebrand Factor
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AnimalAntigensMaleOsmolar ConcentrationPlasminogen Activator Inhibitor 1RatsRats, WistarRetinoidsTime FactorsTissue Plasminogen ActivatorUrinary Plasminogen Activatorvon Willebrand Factor
TNO Identifier
232067
Repository link
https://resolver.tno.nl/uuid:93389581-663d-4016-b461-e54a3fbba685
ISSN
00029513
Source
American Journal of Physiology - Regulatory Integrative and Comparative Physiology, 264(5 Pt 2), pp. R931-937.
Pages
R931-937
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