TY - JOUR
T1 - Thyroid hormone treatments differentially affect the temperature kinetics properties of FoF1 ATPase and succinate oxidase as well as the lipid/phospholipid profiles of rat kidney mitochondria
T2 - A correlative study
AU - Modi, Hiren R.
AU - Patel, Samir P.
AU - Katyare, Surendra S.
AU - Patel, Minal
PY - 2007/2
Y1 - 2007/2
N2 - Effect of thyroidectomy (Tx) and subsequent treatment with 3,5,3′-triiodo-l-thyronine (T3) or replacement therapy (T R) with T3 + l-thyroxine (T4) on the temperature kinetics properties of FoF1 adenosine triphosphatase (ATPase, ATP synthase, H+-translocating ATP synthase EC 3.6.3.14) and succinate oxidase (SO) and on the lipid/phospholipid makeup of rat kidney mitochondria were examined. Tx lowered ATPase activity, which T3 treatment restored. SO activity was unchanged in Tx but decreased further by T3 treatment. TR restored both activities. The energies of ATPase activation in the high and low temperature ranges (E H and E L) increased in the Tx and T3 animals with decrease in phase transition temperature (Tt). TR restored E H and E L but not Tt to euthyroid levels. E H and E L of SO decreased in Tx animals. T3 and TR restored E H whereas E L was restored only in the TR group; Tt increased in both groups. Total phospholipid and cholesterol contents decreased significantly in Tx and T3-treated animals. In Tx animals, sphingomyelin (SPM) and phosphatidylcholine (PC) components decreased, while phosphatidylserine (PS) and diphosphatidylglycerol components increased. T 3 and TR treatments caused decreases in SPM, phosphatidylinositol and PS. PC and phosphatidylethanolamine (PE) increased in the T3 group. TR resulted in increased lysophospolipids and PE. Changes in kinetic parameters of the two enzymes were differently correlated with specific phospholipid components. Both T3 and T R regimens were unable to restore normal membrane structure-function relationships.
AB - Effect of thyroidectomy (Tx) and subsequent treatment with 3,5,3′-triiodo-l-thyronine (T3) or replacement therapy (T R) with T3 + l-thyroxine (T4) on the temperature kinetics properties of FoF1 adenosine triphosphatase (ATPase, ATP synthase, H+-translocating ATP synthase EC 3.6.3.14) and succinate oxidase (SO) and on the lipid/phospholipid makeup of rat kidney mitochondria were examined. Tx lowered ATPase activity, which T3 treatment restored. SO activity was unchanged in Tx but decreased further by T3 treatment. TR restored both activities. The energies of ATPase activation in the high and low temperature ranges (E H and E L) increased in the Tx and T3 animals with decrease in phase transition temperature (Tt). TR restored E H and E L but not Tt to euthyroid levels. E H and E L of SO decreased in Tx animals. T3 and TR restored E H whereas E L was restored only in the TR group; Tt increased in both groups. Total phospholipid and cholesterol contents decreased significantly in Tx and T3-treated animals. In Tx animals, sphingomyelin (SPM) and phosphatidylcholine (PC) components decreased, while phosphatidylserine (PS) and diphosphatidylglycerol components increased. T 3 and TR treatments caused decreases in SPM, phosphatidylinositol and PS. PC and phosphatidylethanolamine (PE) increased in the T3 group. TR resulted in increased lysophospolipids and PE. Changes in kinetic parameters of the two enzymes were differently correlated with specific phospholipid components. Both T3 and T R regimens were unable to restore normal membrane structure-function relationships.
KW - FoF ATPase
KW - Lipid/phospholipid profile
KW - Succinate oxidase
KW - Temperature kinetics
KW - Thyroid hormone
KW - Thyroidectomy
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U2 - 10.1007/s00232-007-9013-4
DO - 10.1007/s00232-007-9013-4
M3 - Article
C2 - 17568978
AN - SCOPUS:34548023273
SN - 0022-2631
VL - 215
SP - 135
EP - 145
JO - Journal of Membrane Biology
JF - Journal of Membrane Biology
IS - 2-3
ER -