An Improved Time- and Labor- Efficient Protocol for Mouse Primary Hepatocyte Isolation
October 25th, 2021
Primary hepatocytes are a valuable tool to study liver response and metabolism in vitro. Utilizing commercially available reagents, an improved time- and labor-efficient protocol for mouse primary hepatocyte isolation was developed.
Mouse primary hepatocytes are important in liver studies. Especially for glucose metabolism, and hepatic drug testing. Time wise the isolation process can be time consuming and the energy costly.
This protocol can provide an efficient way to isolate mouse primary hepatocytes. It is time and labor friendly. Requiring very few steps with all regions commercially available.
Begin by using the peristaltic pump to start pumping warmed up double distilled water at a speed of 4 mL per minute, for five minutes. Then change the pumping tube from water to warmed up perfusion medium. Monitoring the air bubble between the water and perfusion medium.
Will help track the flow of the perfusion medium through the system. Next disinfect the abdomen of an anesthetized eight week old C57 black 6J female mouse with 70%ethanol. And using a scissor, cut open the abdomen to expose the liver, portal vein and inferior vena cava.
Then stop the peristaltic pump. After ensuring that the pumping tube contains perfusion medium and not water. Insert a 24 gauge catheter into the inferior vena cava.
Switch the pump back on and cut the portal vein open. While the perfusion medium is being pumped, press the portal vein every minute to let the liquid reach every corner of the liver. Continue pumping for approximately three to five minutes or until the flushed out liquid is clear.
Next change the pumping tube from the perfusion medium to the collagenase dispase medium. And press the portal vein every minute to let the liquid reach every corner of the liver. Continue pumping until all 25 mL of the collagenase dispase medium are depleted.
Next isolate the whole liver without the gallbladder. And placed it in 30 mL of wash medium in a Petri dish on ice. Using forceps tear the liver into pieces to release primary hepatocytes into the solution.
At this stage, the wash medium turns into a cloudy solution containing released primary hepatocytes and small liver pieces. Filter this cloudy solution through a 70 micron cell strainer, into 20 mL of 1X per call HBSS in a 50 mL tube on ice. And mix the solution by inverting the tube 20 times.
Next centrifuge the solution. Then in the tissue culture hood, aspirate the supernatant. And wash the pellet with 30 mL of cold wash medium.
Pellet the cells once again with centrifugation. Remove the supernatant, and re-suspend the pellet in 25 mL of culture medium. Count the cells and plate them on desired culture plates.
According to the experimental design. After plating, isolated primary hepatocytes were firmly attached by one hour and fully expanded after 12 hours. In the isolated hepatocytes, mRNA levels of hepatocyte markers, such as transthyretin, CD95, ASGR1, and ASGR2 were significantly increased compared to the whole liver.
In contrast the presence of immune cells, stellate cells, and endothelial cells was lower. As evidenced by a sharp decrease in CD45, collagen type 1 alpha 1, and endothelial cell 2 kinase 2 mRNA levels. Suggesting that this protocol can greatly reduce interference from other hepatic cells.
After plating ASGR1 and ASGR2 levels decreased with time, but remain comparable to the whole liver until the 12 hour time point. Especially for ASGR1. The expression level of membrane bound CD81 was consistent for up to 48 hours.
In comparison, toll-like receptor 4 expression generally increased and became higher than in vivo levels after 48 hours. Insulin sensitivity assays demonstrated that insulin significantly promoted phosphorylation of both AKT at serine 473. And forkhead box 01 at serine 256, in the hepatocytes.
Indicating the sensitivity of primary hepatocytes to insulin. Phosphoenolpyruvate carboxykinase protein levels significantly increased after glucagon treatment. Suggesting that the glucose production pathway was activated.
This activation was further confirmed by increased glucose production. And with other glucose production stimulators like Forskolin+IBMX. This protocol can save both time and energy for studies using mouse primary hepatocytes.
Following this protocol, related experiments such as the hypothetical glucose metabolism and pharmaceutical biomarker assays can be carried out.
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Overview
This study presents a labor- and time-efficient protocol for isolating mouse primary hepatocytes, which are critical for research in liver function and metabolism. The method utilizes commercially available reagents to enhance yield and minimize interference from non-parenchymal cells.
Key Study Components
Research Area
- Hepatic metabolism
- Glucose metabolism
- Drug testing
Background
- Mouse primary hepatocytes are essential for studying liver biology.
- Traditional isolation methods are often time-consuming and labor-intensive.
- Reducing isolation time can facilitate more efficient biological experimentation.
Methods Used
- Isolation protocol using peristaltic pump and collagenase dispase medium.
- Mouse model: C57BL/6J female mice.
- Techniques for cell culture and measurement of gene expression.
Main Results
- Increased mRNA levels of hepatocyte markers compared to whole liver.
- Decreased presence of immune and endothelial cells post-isolation.
- Demonstrated insulin sensitivity and activated glucose production pathways.
Conclusions
- This protocol significantly improves the efficiency of isolating primary hepatocytes.
- Enhanced understanding of glucose metabolism and drug response in liver studies.
Frequently Asked Questions
Executive Industry Relevance
Efficient isolation of primary hepatocytes is critical for liver metabolism and drug testing studies, where time and labor constraints impact throughput in discovery workflows. This protocol reduces isolation time to ~35 minutes while maintaining hepatocyte yield and purity, supporting rapid hypothesis testing in preclinical models. The method enables scalable preparation of disease-relevant systems for mechanistic de-risking in target validation and lead identification pipelines.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Provides purified hepatocytes for interrogating therapeutic hypotheses in glucose metabolism and hepatic drug response pathways.
- Operational Value: Reduces time and labor burden, enabling higher throughput in target validation assays.
- Predictive Value: Yields hepatocytes with demonstrated insulin sensitivity and gluconeogenesis activation, supporting mechanistic de-risking of liver targets.
Screening & Assay Development
- Scientific Value: Delivers hepatocytes with low non-parenchymal cell interference, improving assay specificity for compound screening.
- Operational Value: Uses commercially available reagents and standardized steps, enhancing reproducibility across screening campaigns.
- Scalability: Enables preparation of validated biological systems suitable for high-content or phenotypic screening platforms.
Translational & Preclinical Research
- Translational Continuity: Supports disease-relevant systems for preclinical validation of liver-targeted compounds.
- Risk-Adjusted Advancement: Generates hepatocytes with validated glucose production and insulin response, informing go/no-go decisions.
- Biomarker Alignment: Maintains hepatocyte marker expression (ASGR1, ASGR2, CD81) for up to 12 hours, enabling biomarker-assay compatibility.
Pipeline & Workflow Integration
The method fits within the discovery continuum from target validation through lead identification to preclinical studies, providing a reliable source of primary hepatocytes for liver metabolism assays.
- Discovery Biology: Enables hypothesis testing of hepatic pathways by delivering hepatocytes with confirmed marker expression and functional responses.
- Screening: Produces hepatocytes suitable for compound evaluation due to reduced stromal cell contamination and consistent insulin sensitivity.
- Analytics: Supports quantitative readouts such as glucose production, phosphorylation assays, and mRNA expression of hepatocyte markers.
- Translational Research: Connects discovery to preclinical work by providing hepatocytes that maintain key metabolic functions for up to 48 hours.
- Enterprise Reuse: Establishes a reusable isolation capability that standardizes hepatocyte preparation across projects and teams.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence in liver metabolism studies through reduced cellular interference and functional validation.
- Operational Value: Streamlines workflow with minimal steps and commercially available reagents, improving lab efficiency.
- Strategic Value: Accelerates discovery timelines by reducing isolation time from hours to ~35 minutes, increasing assay frequency.
- Portfolio Impact: Enables risk-adjusted prioritization of liver targets by providing reliable preclinical models for mechanism validation.
Implementation Considerations
- Requires expertise in mouse surgery and perfusion techniques.
- Depends on access to a peristaltic pump and sterile tissue culture environment.
- Necessitates standardized reagent preparation (perfusion medium, collagenase dispase, wash and culture media).
- Involves adaptation considerations for different mouse strains or ages beyond the C57BL/6J female model used.
- Limited by the need for immediate use of isolated hepatocytes to maintain functional integrity, as marker expression declines after 12 hours.
