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ALPPS Versus PVE/PL

ABSTRACT: Study Title Comparison of two different models of liver growth stimulation in advanced colorectal liver metastatic disease, (LIGRO Trial) enabling liver resection Methodology Scandinavian Multiple Center Randomized Registry Based Clinical Trial Study duration The planned duration of study participation for an individual subject from inclusion to follow-up are 3 years Primary investigator: Per Sandstrom (Linköping) Number of subjects 100 patients randomized in a 1:1 randomization Diagnosis and main inclusion criteria Patients with colorectal liver metastasis requiring liver resection, but are not resectable in one step because of a future liver remnant/standardized total liver volume of < 30 % extrahepatic metastatic disease is not an exclusion criteria if they can be addressed surgically in the future Overall goal To evaluate if the ALPPS approach is superior to PVE in enabling patients, primarily unresectable due to inadequate FLR, to be resected and reach an R0 situation with an acceptable level of complications and perioperative mortality. To evaluate if the ALPPS approach increases the growth rate of the liver compared to portal embolization or portal ligation leading to a shorter treatment period. In addition the investigators aim to study if ALPPS may reach these goals without detectable or improved differences in tumor activity (PFS and OS), but with a shorter recovery and a higher proportion of patients reaching R0. Hypothesis A higher proportion of patients can be resected with ALPPS counted as rate resected compared to the previously established methods with portal ligation or embolization. This increased resection rate will not reduce the R0 rate, or increase the rate of Clavien grade 4 complication or higher (H0). The ALPPS approach will increase the growth rate compared to portal embolization/ligation measured one week after the primary intervention.

DISEASE(S): Liver Metastases,Colorectal Cancer,Colorectal Neoplasms

PROVIDER: 2172503 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:Following parenchymal loss, the liver regenerates restoring normal mass and metabolic function. Prevailing theories on triggering events leading to regeneration include humoral, metabolic and flow-mediated mechanisms, the latter emphasizing the importance of shear stress mediated nitric oxide (NO) regulation. We aimed to investigate whether the grade of resection and hence the portal venous pressure and sinusoidal shear stress increase, would be reflected in the gene expression profiles in the liver remnant by employing a global porcine cDNA microarray chip with approximately 23 000 genes represented. Six pig livers were resected with 62% (Low Portal Pressure Resection, LPPR) and 75% (High Portal Pressure Resection) resulting in a portal venous pressure increase from a baseline of 6.1 mmHg to 8.2 and 12 mmHg respectively. By sampling consecutive biopsies from the liver remnants we found differentially expressed genes in the HPPR group to have functions related primarily to apoptosis, nitric oxide metabolism and oxidative stress, whereas differentially expressed genes in the LPPR group potentially regulate the cell cycle. Common to both groups was the upregulation of genes regulating inflammation, transport, cell proliferation and development and protein metabolism. Also common to both groups was both up- and downregulation of genes regulating cell-cell signaling, signal transduction, cell adhesion and translation. Genes regulating the metabolism of lipids, hormones, amines, and alcohol were downregulated in both groups. Conclusions: The genetic regenerative response in the liver remnant to varies according to the level of resection. Keywords: time course, treatment comparison Three pigs underwent a 62% liver resection (low-pressure resection, LPR) and three underwent a 75% resection (high-pressure resection, HPR). Biopsies from the liver remnant were taken from all animals at time points 1, 30, 90, minutes and 3, 4 and 6 hours after resection. Expression profiling was conducted by hybridising each sample against a common reference, consisting of liver RNA from an unrelated animal.

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ALPPS Versus PVE/PL

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