Arrow pointing left GM6001 concentration = tied ligature around pedicle of ICL. Figure 2 Sequential lobe biopsy during IPRL (part II). A. Arrow pointing right = tied ligature around pedicle of ICL. ICL has been removed. B. Arrow pointing right = tied ligature around pedicle of ICL. Arrow pointing left = tied ligature around pedicle of SCL. Both caudate lobes have been removed. C. Arrow pointing right = untied ligature placed

around body of IRLL. D. Biopsied liver lobes. At appropriate time points, the left lateral and medial lobes are folded cranially again, and the superior caudate lobe (Figure 2B) and the inferior right lateral lobe (IRLL) (Figure 2C) may be removed. A partial biopsy is taken of the IRLL to avoid damage to the underlying inferior vena cava. This ligature is only tied to compress the remaining liver lobe.

If it is tied completely, it will cut through the lobe, resulting in leakage of perfusate. For this reason, the IRLL is the final biopsy taken at the conclusion of the IPRL experiment. If the liver is required for electron microscopy, it can then be immediately perfused with glutaraldehyde [13]. Each biopsied lobe (Figure 2D) was cut into thirds longitudinally, which were weighed and recorded. The central third was typically used for Ferrostatin-1 price histology, and if required, the lateral thirds can be homogenised for biochemical assays. For the duration of each IPRL experiment, the liver was even in colour, had sharply defined edges on the lobes and the perfusate was pale yellow and clear. The final transaminase levels measured in perfusate were similar to those measured in baseline serum prior to the commencement of IPRL. Bile flow reduces during perfusion (data not shown). Histology The hepatocytes in most sections of the ICL contain clear, pale staining nuclei with one

to two nucleoli and clumped chromatin (Figure 3A). Occasional binucleate cells (Figure 3A) and BAY 11-7082 nmr mitotic figures (Figure 3B) are present. The cytoplasm of most hepatocytes is pale and eosinophilic with finely granular basophilic inclusions. The hepatic sinusoids and central veins Sclareol are predominantly clear of erythrocytes. Fifteen out of eighteen sections taken contained either no vacuolation or diffuse pockets of mild to moderate vacuolation (Figure 4A). Sections from three out of eighteen separate ICL biopsies contained severe, extensive, cytoplasmic vacuolation (Figure 4B). Figure 3 Normal histological section of ICL. A. Typical clear, pale staining, hepatocyte nuclei with one to two nucleoli and clumped chromatin (*). Black arrow shows a binucleate cell. B. Black arrow shows a mitotic figure. Figure 4 Histological section of ICL showing vacuolation (insets show higher magnification). A. Mild, isolated vacuolation (black boxes). B. Severe, extensive, cytoplasmic vacuolation. The SCL and IRLL biopsies showed increased dilation of sinusoids, portal veins and central veins (Figure 5).