=> Product recommendation

LAMININ-521 and/or LAMININ-111

 

=> Hepatocyte differention protocol

Watch the video and get the hepatocyte differentiation protocol here

Watch the video and get the hepatocyte differentiation protocol on hr laminin substrates here 


 

=> Veiw on demand

Defined generation of hPSC-derived hepatocyte-like cells on laminin

Watch webinar on efficient differentiation and functional organization of hPSC-derived hepatocyte on hr laminin substrates.

 

 

=> APPLICATION NOTE

Get the hepatocyte differentiation application note here

 

=> Customer testimonial 

"The use of recombinant laminins in conjunction with our differentiation systems have significantly advanced stem cell derived hepatocyte performance and polarity. Importantly, those processes are now fully defined, and GMP ready, offering exciting prospect for human regenerative medicine”

                                             Dr. David Hay, University of Edinburgh, UK

         
Get more customer testimonials here

 

 

=> Articles

Find a selection of hepatic articles here

LAMININ KEY ADVANTAGES

  • Highly efficient hepatocyte specification with improved function, phenotype and homogeneity

  • Significant effect on hepatocyte P450 enzyme metabolic activity

  • Cells arrange themselves in lobule like structures, express MRP1 and MRP2 and are capable of biliary efflux

  • Easy to scale up

  • Efficient expansion and maintenance of hPSC-derived hepatoblasts for >15 passages

  • Undifferentiated cells are effectively eliminated from the differentiated hepatoblast population

  • Efficient clonal expansion of hepatoblast

  • Promote attachment of human primary hepatocytes

  • Defined and xeno-free culture method for reproduceble experments

 

 hPSc-derived liver cell and hepatocytes cultured on human recombinant laminin-521 and laminin-111 cell culture reagents Laminins play a vital role for liver progenitor cell mediated regeneration

The liver contains several different laminin (LN) isoforms that play important roles in development, for liver tissue homeostasis, organization and regeneration. Hepatic progenitor cells (HPCs) and are always closely associated with a laminin-rich basement membrane. After injury, laminin accumulate around the progenitorsa and the laminin-liver progenitor cell interactions are a critical for hepatic progenitor cell (HPC) mediated regeneration. Murine regeneration models show that the alpha-1, alpha-2 and alpha-5 laminin chains increase in association with HPC activation and that laminin alpha-5 containing matrix is deposited around HPCs during regeneration. Moreover, alpha-5 laminin matrix promote HPC attachment, migration and maintenance. 


Laminin-521 and laminin-111 support effective hepatocyte differentiation and s
ignificantly advance hepatic maturation

In a publication by Cameron et al., the authors show that culture of human ES cells (hESC) on human recombinant laminin-521 and laminin-111 substrates significanly improved hepatocyte differentiation, maturation, function and stabilization of phenotype compared to Matrigel cultured cells. The laminin differentiation protocol generates high ratio of hepatocyte-like cells positively stained for ALB, CYP2D6 and CYP3A and the cells exhibit significantly increase in P450 metabolic enzyme functions relative to cells on Matrigel or human primary hepatocytes. The laminin cultured hESC-derived hepatocyte-like cells display a more primary hepatocyte-like appearance and are often bi-nucleate with very pronounced nuclei. Moreover, the hepatocyte-like cells arranged themselves in lobule-like structures within the laminin coated culture dish, reminiscent of regenerating liver. hESC differentiated on laminin-521 and laminin-111 exhibit vast networks of highly organized hepatocytes which express multidrug resistance-associated protein 1 (MRP1) and 2 (MRP2) and are capable of biliary efflux. The results presented in the paper represents a significant advance compared to any previous published data, especially regarding metabolic activity and functional cell organization. 

The positive effect of laminin-521 on hepatic differentiation is supported by a recent publication by Kanninen et al. show that human recombinant laminin-521 can be used as stage specific matrix to guide the hepatic specification of pluripotent stem cells. Moreover, the expression of laminin-521-specific integrins increase during definitive endoderm and hepatic specification. hPSC-derived hepatic cells differentiated on these laminin matrices show up-regulation of liver-specific protein markers, secreted human albumin, stored glycogen, and exhibited cytochrome P450 enzyme activity and inducibility. Contrary, the authors show that fibronectin is not a vital matrix protein for generation of definitive endoderm cells. A screening of the acellular matrix produced by the popular hepatic tumor cell line HepaRG show that laminin-521, laminin-511 and fibronectin are highly expressed.

Hepatic progenitor cells can be effectively be expanded and maintained on laminin-111 in vitro

These results are in accordance with in vitro studies that show that isolated and hESC-derived hepatic progenitor cells effectively can be expanded with maintained phenotype on laminin-111. The group of Mizuguchi show that human recombinant laminin-111 is optimal for maintenance and clonal expansion of homogenous populations of hESC and hiPSC derived hepatoblasts. The hepatoblasts were efficiently expanded on laminin-111 for more than 15 passages with maintained phenotype and could thereafter be further differentiated into both hepatic and biliary lineages. Moreover, since pluripotent stem cells cannot survive and self-renew on laminin-111, residual, undifferentiated cells are effectively eliminated from the differentiated hepatoblast population by the matrix itself, an important mechanism from an therapeutic aspect. When transplanted in CCl4-treated immunodeficient mice, the laminin-cultured hepatoblasts successfully engrafted and albumin-positive cells were observed in the liver of the transplanted mice.

Laminin promote attachment of human primary hepatocytes

In a publication by Watanabe et al., laminin have also been shown to promote attachment of human primary hepatocytes and can effectively be used as culture substrate for these cells.


Recommended publications

Hepatocyte differentiation on laminin

 

Hepatic progenitors

 

Culture of primary hepatocytes



More articels HERE