2012
DOI: 10.1016/j.mad.2012.01.008
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Retinoic acid-induced differentiation increases the rate of oxygen consumption and enhances the spare respiratory capacity of mitochondria in SH-SY5Y cells

Abstract: Retinoic acid (RA) is used in differentiation therapy to treat a variety of cancers including neuroblastoma. The contributing factors for its therapeutic efficacy are poorly understood. However, mitochondria (MT) have been implicated as key effectors in RA-mediated differentiation process. Here we utilize the SH-SY5Y human neuroblastoma cell line as a model to examine how RA influences MT during the differentiation process. We find that RA confers an approximately 6-fold increase in the oxygen consumption rate… Show more

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Cited by 63 publications
(47 citation statements)
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“…Importantly, activation of either UCP1 or futile cycles should go hand in hand with the induction of mitochondrial ␤ -oxidation of fatty acids and OXPHOS capacity for a meaningful effect on adipocyte lipid content and whole body energy expenditure to be achieved. It has been previously shown that ATRA enhances OXPHOS and oxygen consumption in SH-SY5Y human neuroblastoma cells, even without any increase in the number of mitochondria or measurable changes in the composition of the electron transport chain ( 42 ). Here, we present evidence of increased OXPHOS capacity and mitochondrial content in 3T3-L1 adipocytes following ATRA exposure, necessary for both UCP1-dependent and UCP1-independent energy dissipation mechanisms.…”
Section: Discussionsupporting
confidence: 56%
“…Importantly, activation of either UCP1 or futile cycles should go hand in hand with the induction of mitochondrial ␤ -oxidation of fatty acids and OXPHOS capacity for a meaningful effect on adipocyte lipid content and whole body energy expenditure to be achieved. It has been previously shown that ATRA enhances OXPHOS and oxygen consumption in SH-SY5Y human neuroblastoma cells, even without any increase in the number of mitochondria or measurable changes in the composition of the electron transport chain ( 42 ). Here, we present evidence of increased OXPHOS capacity and mitochondrial content in 3T3-L1 adipocytes following ATRA exposure, necessary for both UCP1-dependent and UCP1-independent energy dissipation mechanisms.…”
Section: Discussionsupporting
confidence: 56%
“…An increased mitochondrial activity after treatment with retinoids was reported in neuroblastoma cell lines [66], and it was demonstrated that more differentiated neuronal cells exhibit higher oxygen consumption rates as well as metabolic rates [67]. These findings thus support the presumed neuronal differentiation of D283 Med cells treated with ATRA and the capability of CA and CX to enhance this effect.…”
Section: Discussionsupporting
confidence: 61%
“…Spare reserve capacity reflects the difference between basal and maximal respiratory rate, and this capacity was determined by measuring OCR after treatment with oligomycin to block ATP synthesis and FCCP to uncouple ATP synthesis from the electron transport chain. [15][16][17] The spare reserve capacity in primary AML samples and cell lines was lower than that in normal hematopoietic cells or solid tumor cell lines (Figure 4A-B; summary of results in supplemental Table 3). …”
Section: Aml Cells Have Low Spare Reserve Capacity In Their Respiratomentioning
confidence: 99%