Biophysics of freezing of tissue equivalents

Saravana Kumar Balasubramanian, John Bischof, Allison Hubel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Understanding the biophysics of freezing a tissue equivalent (TE) is the first step to its successful cryopreservation. TEs are formed by entrapping human dermal fibroblasts (HDFs) in collagen or in fibrin gel. Freezing studies are done using a Linkam cryostage with different controlled cooling rates. Typically, freezing results in dehydration or intracellular ice formation (IIF), both of which can be potentially lethal to cells. Quantification of the biophysics involves determining the water permeability parameters, E Lp and L pg, and the intracellular ice nucleation parameters, Ωo and κo. HDFs in suspension show 55% IIF whereas HDFs in collagen and in fibrin TE 100% IIF at 130 C/min cooling rate. Cell-cell and cell-matrix interactions are found to play a significant role during freezing as observed from the obtained biophysical parameters.

Original languageEnglish (US)
Title of host publicationProceedings of the 2005 Summer Bioengineering Conference, 2005 SBC
Pages930-931
Number of pages2
StatePublished - Dec 1 2005
Event2005 Summer Bioengineering Conference - Vail, CO, United States
Duration: Jun 22 2005Jun 26 2005

Publication series

NameProceedings of the 2005 Summer Bioengineering Conference
Volume2005

Other

Other2005 Summer Bioengineering Conference
Country/TerritoryUnited States
CityVail, CO
Period6/22/056/26/05

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