Adipose atrophy in cancer cachexia: morphologic and molecular analysis of adipose tissue in tumour-bearing mice

C. Bing*, S. Russell, E. Becket, M. Pope, M.J. Tisdale, P. Trayhurn, J.R. Jenkins

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Extensive loss of adipose tissue is a hallmark of cancer cachexia but the cellular and molecular basis remains unclear. This study has examined morphologic and molecular characteristics of white adipose tissue in mice bearing a cachexia-inducing tumour, MAC16. Adipose tissue from tumour-bearing mice contained shrunken adipocytes that were heterogeneous in size. Increased fibrosis was evident by strong collagen-fibril staining in the tissue matrix. Ultrastructure of 'slimmed' adipocytes revealed severe delipidation and modifications in cell membrane conformation. There were major reductions in mRNA levels of adipogenic transcription factors including CCAAT/enhancer binding protein alpha (C/EBPα), CCAAT/enhancer binding protein beta, peroxisome proliferator-activated receptor gamma, and sterol regulatory element binding protein-1c (SREBP-1c) in adipose tissue, which was accompanied by reduced protein content of C/EBPα and SREBP-1. mRNA levels of SREBP-1c targets, fatty acid synthase, acetyl CoA carboxylase, stearoyl CoA desaturase 1 and glycerol-3-phosphate acyl transferase, also fell as did glucose transporter-4 and leptin. In contrast, mRNA levels of peroxisome proliferators-activated receptor gamma coactivator-1alpha and uncoupling protein-2 were increased in white fat of tumour-bearing mice. These results suggest that the tumour-induced impairment in the formation and lipid storing capacity of adipose tissue occurs in mice with cancer cachexia. © 2006 Cancer Research UK.

Original languageEnglish
Pages (from-to)1028-1037
Number of pages10
JournalBritish Journal of Cancer
Volume95
Issue number8
Early online date3 Oct 2006
DOIs
Publication statusPublished - 17 Oct 2006

Bibliographical note

© 2006 Cancer Research UK Creative Commons Attribution-NonCommercial-Share-Alike 3.0 licence, subject to the conditions listed at http://creativecommons.org/licences/by-nc-sa/3.0/

Keywords

  • cancer cachexia
  • adipose tissue
  • C/EBPalpha
  • SREBP-1c
  • mice

Fingerprint Dive into the research topics of 'Adipose atrophy in cancer cachexia: morphologic and molecular analysis of adipose tissue in tumour-bearing mice'. Together they form a unique fingerprint.

  • Cite this