Sartor 2004 Gen Physiol Biophys
Sartor P, Madec F, Garcia L, Dejean L, Beauvoit B, Dufy B, Rigoulet M (2004) Interactions between intracellular chloride concentrations, intracellular pH and energetic status in rat lactotrope cells in primary culture. Gen Physiol Biophys 23:195-208. |
Sartor P, Madec F, Garcia L, Dejean L, Beauvoit B, Dufy B, Rigoulet M (2004) Gen Physiol Biophys
Abstract: Rat lactotrope cells in primary cultures have a higher intracellular Clβ concentration ([Clβ]i) than that predicted by a passive distribution across the membrane. This suggests that active cellular mechanisms ensure this ionic equilibrium. In this study, we examined the interactions between pHi, [Clβ]i regulation and cell energetics. We analyzed: 1. the interactions between extracellular Clβconcentrations, [Clβ]i and cellular energy; 2. the influence of [Clβ]i on respiratory chain function; 3. the correlation with glycolysis and; 4. the role played by pHi in these cellular mechanisms. We show that low [Clβ]i decreases ATP cell content, ATP/ADP ratio and modify phosphorylative oxidations. ATP production is rather due to the anaerobic pathway of the glucose metabolism than the aerobic one and depends also on other metabolic substrates among which glutamine probably has a special role. Finally, pHi appears as a determinant in the balance between aerobic and anaerobic pathways. These results are discussed in relation to the role of Clβ in normal and pathological (effect of hypoxia on mature and immature neurons) cell situations. β’ Keywords: Rat lactotrope cells, Cell energetics, Aerobic and anaerobic pathways, pHi, [Clβ]i
β’ O2k-Network Lab: FR Pessac Diolez P, FR Bordeaux Devin A
Labels:
Stress:Ischemia-reperfusion Organism: Rat Tissue;cell: Nervous system Preparation: Intact cells
HRR: Oxygraph-2k