Savagner 2001 J Clin Endocrinol Metabol

Savagner F, Franc B, Guyetant S, Rodien P, Reynier P, Malthiery Y (2001) Defective mitochondrial ATP synthesis in oxyphilic thyroid tumors. J Clin Endocrinol Metabol 86: 4920-4925.

» PMDI: 11600563

Savagner F, Franc B, Guyetant S, Rodien P, Reynier P, Malthiery Y (2001) J Clin Endocrinol Metabol

Abstract: Oxyphilic tumors (oncocytomas or Hürthle cell tumors) form a rare subgroup of thyroid tumors characterized by cells containing abundant mitochondria. The relationship between the mitochondrial proliferation and the pathogenesis of these tumors is unknown. We have assessed the expression of the mitochondrial ND2 and ND5 (subunits of the nicotinamide adenine dinucleotide dehydrogenase complex) genes and the nuclear UCP2 (uncoupling protein 2) gene in 22 oxyphilic thyroid tumors and matched controls. The consumption of oxygen in mitochondria from tumors was determined by polarography. ATP assays were used to explore the mitochondrial respiratory chain activity and the oxidative phosphorylation coupling in seven fresh thyroid tumors and controls. Adenosine triphosphate synthesis was significantly lower in all the tumors, compared with controls, suggesting that a coupling defect in oxidative phosphorylation may be a cause of mitochondrial hyperplasia in oxyphilic thyroid tumors.

• O2k-Network Lab: FR_Angers_Malthiery Y

Labels: MiParea: Respiration, mt-Biogenesis;mt-density, mt-Medicine  Pathology: Cancer 

Organism: Human 

Preparation: Isolated Mitochondria"Isolated Mitochondria" is not in the list (Intact organism, Intact organ, Permeabilized cells, Permeabilized tissue, Homogenate, Isolated mitochondria, SMP, Chloroplasts, Enzyme, Oxidase;biochemical oxidation, ...) of allowed values for the "Preparation" property.  Enzyme: TCA Cycle and Matrix Dehydrogenases"TCA Cycle and Matrix Dehydrogenases" is not in the list (Adenine nucleotide translocase, Complex I, Complex II;succinate dehydrogenase, Complex III, Complex IV;cytochrome c oxidase, Complex V;ATP synthase, Inner mt-membrane transporter, Marker enzyme, Supercomplex, TCA cycle and matrix dehydrogenases, ...) of allowed values for the "Enzyme" property., Uncoupling protein  Regulation: Coupling efficiency;uncoupling  Coupling state: OXPHOS 

HRR: Oxygraph-2k