Phung 2011 J Food Science: Difference between revisions
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{{Publication | {{Publication | ||
|title=Phung | |title=Phung VT, Saelid E, Egelandsdal B, Volden J, Slinde E (2011) Oxygen consumption rate of permeabilized cells and isolated mitochondria from pork M. masseter and liver examined fresh and after freeze-thawing at different pH values. J Food Science 76:C929-36. | ||
|info=[http://onlinelibrary.wiley.com/doi/10.1111/j.1750-3841.2011.02275.x/abstract] | |info=[http://onlinelibrary.wiley.com/doi/10.1111/j.1750-3841.2011.02275.x/abstract http://onlinelibrary.wiley.com] | ||
|authors=Phung | |authors=Phung VT, Saelid E, Egelandsdal B, Volden J, Slinde E | ||
|year=2011 | |year=2011 | ||
|journal= | |journal=J Food Science | ||
|abstract=The oxygen consumption rate (OCR) of 2 types of permeabilized tissues and their corresponding isolated mitochondria from porcine M. masseter and liver, resulting in 4 systems, was studied at different pH values (5.0 to 7.1) using fresh samples and samples frozen directly in liquid nitrogen (N2) or air-frozen at −20◦C. A protocol with the additive sequence rotenone–succinate–ADP (adenosine diphosphate)–cytochrome c–FCCP (carbonyl cyanide p-trifluoromethoxyphenylhydrazone) was used to study respiration changes. The OCR of liver respiring on succinate (OCRS) was higher than that of muscle tissue. pH had a larger effect on OCRS than freeze-thawing. Low pH was associated with reduced OCRS. The OCRS of isolated muscle mitochondria appeared to be an underestimated relative to the OCRS of permeabilized muscle cells. Increasing pH, following prior subjection to pH 5.0, showed partial reversibility of the OCRS. The freeze-thaw cycle increased the OCRS when muscle systems were frozen and examined above pH 6.0; this effect was less apparent for liver tissue. A response to cytochrome c addition, indicating a defective | |abstract=The oxygen consumption rate (OCR) of 2 types of permeabilized tissues and their corresponding isolated mitochondria from porcine M. masseter and liver, resulting in 4 systems, was studied at different pH values (5.0 to 7.1) using fresh samples and samples frozen directly in liquid nitrogen (N2) or air-frozen at −20◦C. A protocol with the additive sequence rotenone–succinate–ADP (adenosine diphosphate)–cytochrome c–FCCP (carbonyl cyanide p-trifluoromethoxyphenylhydrazone) was used to study respiration changes. The OCR of liver respiring on succinate (OCRS) was higher than that of muscle tissue. pH had a larger effect on OCRS than freeze-thawing. Low pH was associated with reduced OCRS. The OCRS of isolated muscle mitochondria appeared to be an underestimated relative to the OCRS of permeabilized muscle cells. Increasing pH, following prior subjection to pH 5.0, showed partial reversibility of the OCRS. The freeze-thaw cycle increased the OCRS when muscle systems were frozen and examined above pH 6.0; this effect was less apparent for liver tissue. A response to cytochrome c addition, indicating a defective | ||
outer mitochondrial membrane, was observed for all 4 systems. The response was, however, lowest for permeabilized cells. The ADP/FCCP additive pair indicated partial coupling for isolated liver and muscle mitochondria. These additives | outer mitochondrial membrane, was observed for all 4 systems. The response was, however, lowest for permeabilized cells. The ADP/FCCP additive pair indicated partial coupling for isolated liver and muscle mitochondria. These additives | ||
gave weak responses for the permeabilized liver cells while the OCR seemed to be inhibited for permeabilized muscle fibers when ADP/FCCP was added. | gave weak responses for the permeabilized liver cells while the OCR seemed to be inhibited for permeabilized muscle fibers when ADP/FCCP was added. | ||
|keywords=antioxidant, color, cytochrome c, meat, succinate | |keywords=antioxidant, color, cytochrome c, meat, succinate | ||
|mipnetlab=NO_As_Egelandsdal B | |mipnetlab=NO_As_Egelandsdal B | ||
}} | }} | ||
{{Labeling | {{Labeling | ||
|organism=Pig | |||
|tissues=Liver | |||
|preparations=Isolated mitochondria | |||
|instruments=Oxygraph-2k | |instruments=Oxygraph-2k | ||
|additional=musculus masseter | |additional=musculus masseter | ||
}} | }} | ||
Latest revision as of 10:09, 26 February 2015
| Phung VT, Saelid E, Egelandsdal B, Volden J, Slinde E (2011) Oxygen consumption rate of permeabilized cells and isolated mitochondria from pork M. masseter and liver examined fresh and after freeze-thawing at different pH values. J Food Science 76:C929-36. |
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Phung VT, Saelid E, Egelandsdal B, Volden J, Slinde E (2011) J Food Science
Abstract: The oxygen consumption rate (OCR) of 2 types of permeabilized tissues and their corresponding isolated mitochondria from porcine M. masseter and liver, resulting in 4 systems, was studied at different pH values (5.0 to 7.1) using fresh samples and samples frozen directly in liquid nitrogen (N2) or air-frozen at −20◦C. A protocol with the additive sequence rotenone–succinate–ADP (adenosine diphosphate)–cytochrome c–FCCP (carbonyl cyanide p-trifluoromethoxyphenylhydrazone) was used to study respiration changes. The OCR of liver respiring on succinate (OCRS) was higher than that of muscle tissue. pH had a larger effect on OCRS than freeze-thawing. Low pH was associated with reduced OCRS. The OCRS of isolated muscle mitochondria appeared to be an underestimated relative to the OCRS of permeabilized muscle cells. Increasing pH, following prior subjection to pH 5.0, showed partial reversibility of the OCRS. The freeze-thaw cycle increased the OCRS when muscle systems were frozen and examined above pH 6.0; this effect was less apparent for liver tissue. A response to cytochrome c addition, indicating a defective outer mitochondrial membrane, was observed for all 4 systems. The response was, however, lowest for permeabilized cells. The ADP/FCCP additive pair indicated partial coupling for isolated liver and muscle mitochondria. These additives gave weak responses for the permeabilized liver cells while the OCR seemed to be inhibited for permeabilized muscle fibers when ADP/FCCP was added. • Keywords: antioxidant, color, cytochrome c, meat, succinate
• O2k-Network Lab: NO_As_Egelandsdal B
Labels:
Organism: Pig
Tissue;cell: Liver
Preparation: Isolated mitochondria
HRR: Oxygraph-2k
musculus masseter
