Admin area



General and specific diseases

1: Am J Physiol Regul Integr Comp Physiol 2000 Dec;279(6):R2329-35

Metallothionein gene expression and secretion in white adipose tissue.

Trayhurn P, Duncan JS, Wood AM, Beattie JH.

Molecular Physiology and Nutrient-Gene Interaction Groups, Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, Scotland, United Kingdom. This email address is being protected from spambots. You need JavaScript enabled to view it.

White adipose tissue (WAT) has been examined to determine whether the gene encoding metallothionein (MT), a low-molecular-weight stress response protein, is expressed in the tissue and whether MT may be a secretory product of adipocytes. The MT-1 gene was expressed in epididymal WAT, with MT-1 mRNA levels being similar in lean and obese (ob/ob) mice. MT-1 mRNA was found in each of the main adipose tissue sites (epididymal, perirenal, omental, subcutaneous), and there was no major difference between depots. Separation of adipocytes from the stromal-vascular fraction of WAT indicated that the MT gene (MT-1 and MT-2) was expressed in adipocytes themselves. Treatment of mice with zinc had no effect on MT-1 mRNA levels in WAT, despite strong induction of MT-1 expression in the liver. MT-1 gene expression in WAT was also unaltered by fasting or norepinephrine. However, administration of a beta(3)-adrenoceptor agonist, BRL-35153A, led to a significant increase in MT-1 mRNA. On differentiation of fibroblastic preadipocytes to adipocytes in primary culture, MT was detected in the medium, suggesting that the protein may be secreted from WAT. It is concluded that WAT may be a significant site of MT production; within adipocytes, MT could play an antioxidant role in protecting fatty acids from damage.

PMID: 11080101 [PubMed - indexed for MEDLINE]

We use cookies on our website. Some of them are essential for the operation of the site and according to the GDPR generally permissible. Others help us to improve this site and the user experience (tracking cookies). On our privacy page you can decide for yourself whether you want to allowthese cookies or not. To do so, follow the "More Info" link below.