S5d-f). JAXCAV1+/+ mice showed some variability in their steatotic phenotype. However, LD quantification by EM again showed that the absence of CAV1 reduces the

ability of hepatocytes to accumulate LDs (Supporting Fig. S5c). Finally, Balb/CCAV1+/+ mice fed an HFD increase slightly in weight when compared with chow-fed Balb/CCAV1+/+ mice. They also showed a higher weight gain (Supporting Fig. S4c.1) than Balb/CCAV1−/− mice in response to an HFD. However, and unlike KCAV1+/+ and JAXCAV1+/+ mice,19 and consistent with previously published work,20 they were resistant to obesity when fed an HFD (Supporting Fig. S4a-c) and even lost weight during the last 4 weeks on the HFD. Moreover, analysis of ADRP levels by western blot Lapatinib suggested that in comparison with hepatocytes from chow-fed mice, Balb/C hepatocytes have a refractory response to HFD that it is translated into a significant reduction in the accumulation of LDs in hepatocytes. However, HFD-fed Balb/CCAV1+/+ mice still showed a higher number of hepatic LDs (Supporting Fig. S5c) than HFD-fed Balb/CCAV1−/− mice. Finally, we directly analyzed the association of CAV1 with LDs. In agreement selleck chemicals llc with previous results obtained in regenerating

livers from rats,9 we identified CAV1 in purified hepatic LD fractions from regenerating liver (Fig. 3B,E) from 24-hour-fasted liver (Fig. 4C,D; Supporting Fig. S3bc) and from the liver of mice on an HFD (Fig. 5C; Supporting Fig. S5b,e). These results clearly demonstrate that CAV1 associates with LDs in hepatocytes and that loss of CAV1 dramatically impairs the storage of TAG in LDs of mouse hepatocytes. In this work we show that, independently of the mouse genetic background, the expression check details of CAV1 in mouse tissues facilitates the efficient progression

of liver regeneration and accumulation of triacylglycerols in hepatocytes in mice. In two different mouse models the total absence of CAV1 in mice reduced hepatocyte ability to restore the liver mass lost after partial hepatectomy. Our data help resolve the controversy created by two different works that published opposite results.4, 5 Scientists in the field suggested that the impure genetic background used in both studies might be behind the origin of these conflicting data. Now, new data from experiments in pure Balb/CCAV1+/+ and Balb/CCAV1−/− mice showed that lack of CAV1 decreases mouse efficient progression of liver regeneration, supporting our previous published mouse model in KCAV1−/− mice.4 However, these results still did not answer why mice used by Mayoral et al.,5 JAXCAV1−/− mice, achieved liver regeneration despite their lack of CAV1. Using similar experimental conditions to those used by Mayoral et al., we confirmed that JAXCAV1−/− mice achieved liver regeneration and mouse survival was only slightly affected by the absence of CAV1.