Transient micro-elastography: A novel non-invasive approach to measure liver stiffness in mice

World J Gastroenterol. 2011 Feb 28;17(8):968-75. doi: 10.3748/wjg.v17.i8.968.

Abstract

Aim: To develop and validate a transient micro-elastography device to measure liver stiffness (LS) in mice.

Methods: A novel transient micro-elastography (TME) device, dedicated to LS measurements in mice with a range of measurement from 1-170 kPa, was developed using an optimized vibration frequency of 300 Hz and a 2 mm piston. The novel probe was validated in a classical fibrosis model (CCl(4)) and in a transgenic murine model of systemic amyloidosis.

Results: TME could be successfully performed in control mice below the xiphoid cartilage, with a mean LS of 4.4 ± 1.3 kPa, a mean success rate of 88%, and an excellent intra-observer agreement (0.98). Treatment with CCl(4) over seven weeks drastically increased LS as compared to controls (18.2 ± 3.7 kPa vs 3.6 ± 1.2 kPa). Moreover, fibrosis stage was highly correlated with LS (Spearman coefficient = 0.88, P < 0.01). In the amyloidosis model, much higher LS values were obtained, reaching maximum values of > 150 kPa. LS significantly correlated with the amyloidosis index (0.93, P < 0.0001) and the plasma concentration of mutant hapoA-II (0.62, P < 0.005).

Conclusion: Here, we have established the first non-invasive approach to measure LS in mice, and have successfully validated it in two murine models of high LS.

Keywords: Amyloidosis; Fibrosis; Liver; Liver stiffness; Mice; Micro-elastography; Transient elastography; Ultrasound.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amyloidosis / chemically induced
  • Amyloidosis / pathology
  • Animals
  • Carbon Tetrachloride / toxicity
  • Elasticity Imaging Techniques / methods*
  • Female
  • Liver / drug effects
  • Liver / pathology*
  • Male
  • Mice
  • Mice, Inbred Strains

Substances

  • Carbon Tetrachloride