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Kinetics of thyroxine (T-4) and triiodothyronine (T-3) transport in the isolated rat heart
dc.creator | Rosić, Mirko A. | |
dc.creator | Pantović, Suzana B. | |
dc.creator | Lučić, Aleksandra P. | |
dc.creator | Ribarac-Stepić, Nevena B. | |
dc.creator | Anđelković, Ivan Z. | |
dc.date.accessioned | 2018-03-01T18:56:54Z | |
dc.date.available | 2018-03-01T18:56:54Z | |
dc.date.issued | 2001 | |
dc.identifier.issn | 0958-0670 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/2413 | |
dc.description.abstract | The dynamics and kinetics of thyroid hormone transport in the isolated rat heart were examined using the modified unidirectional paired tracer dilution method. The uptake of I-125-thyroxine (I-115-T-4) and I-125-triiodothyronine (I-125-T-3) from the extracellular space into heart cells was measured relative to the extracellular space marker H-3-mannitol. The thyroid hormone maximal uptake was 54.4 % for I-125-T-4 and 52.15 % for I-125-T-3. The thyroid hormone net uptake was 25.69 % for I-125-T-4 and 25.49 % for I-125-T-3. Backflux from the intracellular space was 53.17 % for I-125-T-4 and 61.59 % for I-125-T-3. In the presence of unlabelled thyroid hormones, I-125-T-4 and I-125-T-3 maximal uptakes were reduced from 10.1 to 59.74 % and from 34.6 to 65.3 %, respectively, depending on the concentration of the unlabelled hormone, suggesting a saturable mechanism of the thyroid hormone uptake by the heart cells, with K-m(T4) = 105.46 muM and the maximal rate of I-125-thyroid hormone flax from the extracellular space to heart cells (V-max(T4))= 177.84 nM min(-1) for I-125-T-4 uptake, and K-m(T3) = 80.0 muM and V-max(T3) = 118.5 nM min(-1) for I-125-T-3 uptake. | en |
dc.rights | openAccess | en |
dc.source | Experimental Physiology | en |
dc.title | Kinetics of thyroxine (T-4) and triiodothyronine (T-3) transport in the isolated rat heart | en |
dc.type | article | en |
dcterms.abstract | Рибарац-Степиц, Н; Aндјелковиц, ИЗ; Пантовиц, СБ; Росиц, МA; Луциц, AП; | |
dc.citation.volume | 86 | |
dc.citation.issue | 1 | |
dc.citation.spage | 13 | |
dc.citation.epage | 18 | |
dc.identifier.wos | 000166914100002 | |
dc.identifier.doi | 10.1113/eph8601835 | |
dc.citation.rank | M23 | |
dc.identifier.pmid | 11429614 | |
dc.identifier.scopus | 2-s2.0-0035135522 | |
dc.identifier.fulltext | https://vinar.vin.bg.ac.rs//bitstream/id/12243/2409.pdf |