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Updated: Aug 29, 2026
Assessing Whole-Body Lipid-Handling Capacity in Mice
Published on: November 24, 2020
Effect of apoE/ATP-containing liposomes on hepatic energy state
S Chaïb1, C Charrueau, N Neveux
1Laboratoire de Biologie de la Nutrition EA 2498, Faculté de Pharmacie, Paris, France.
Background/Aims:
ATP-containing liposomes partially prevent ATP depletion in the cold-stored liver. As hepatocytes can specifically bind apoE, we investigated whether the addition of apoE to large (200 nm) ATP-containing liposomes increases their uptake by the liver and further improves hepatic energy stores.
Methods:
Livers from fasted male Hartley guinea-pigs (231 +/- 3 g) were perfused for 90 min under our standard conditions (Control, n = 6) or after a single bolus addition of plain liposomes (Lip, n = 6), ATP (5 micromol)-containing liposomes (ATP-Lip, n = 6) or apoE/ATP-containing liposomes (0.8 or 8mg apoE/g phospholipids; apoE1-Lip and apoE10-Lip, respectively, n = 6 in each group). Liposome uptake and its impact on energy and nitrogen metabolism were studied.
Results:
At its highest concentration, apoE significantly increased liposome uptake (apoE10-Lip: - 9.17 +/- 0.69 vs apoE1-Lip: - 6.18 +/- 0.44 vs ATP-Lip: - 6.40 +/- 0.88 nmol min(-1) g(-1) P < 0.05). This was associated with a significant increase in intrahepatic ATP (apoE10-Lip: 1033 +/- 137 vs apoE1-Lip: 811 +/- 98 and ATP-Lip: 648 +/- 36 nmol g(-1); P < 0.05), which was restored to its level in non-perfused livers. Hepatic viability and nitrogen metabolism were not affected.
Conclusions:
Hepatic ATP content being a key factor in the maintenance of liver graft function, apoE/ATP-containing liposomes should be useful in liver preservation for transplantation.
