Response of a liver tissue slab to a hyperosmotic sucrose boundary condition: Microscale cellular and vascular level effects

Sankha Bhowmick, Chaouki A. Khamis, John C Bischof

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Transport of a non-permeating CPA in liver tissue was studied by experimental and theoretical techniques. The system consisted of a 20 mm x 15 mm x 500 μm (thick) slab of liver tissue which was exposed to culture media and hyperosmotic sucrose (0.3 or 0.6 M) at the boundary. The volumetric changes of cell and vascular spaces within the tissue slab at 125 μm from one of the symmetric boundaries was studied by slam freezing followed by freeze substitution microscopy. The experimental data was then theoretically investigated using two models; one based on an effective diffusion coefficient for sucrose, and another which incorporated the convective flux of water out of the cells (and the tissue) while sucrose diffuses in. We estimate the effective diffusion of sucrose as 16-33% of the actual diffusivity of sucrose in bulk water. The role of convection of water out of the tissue is against the flow of sucrose and appears to be important in reducing the effective diffusivity of the sucrose. The role of vascular compliance, porosity and tortuosity are also discussed with respect to our results.

Original languageEnglish (US)
Pages (from-to)147-162
Number of pages16
JournalAnnals of the New York Academy of Sciences
Volume858
DOIs
StatePublished - Jan 1 1998

Fingerprint Dive into the research topics of 'Response of a liver tissue slab to a hyperosmotic sucrose boundary condition: Microscale cellular and vascular level effects'. Together they form a unique fingerprint.

Cite this