Iron regulation by hepatocytes and free radicals.

Abstract:

:Iron is an essential metallic microelement for life. However, iron overload is toxic. The liver serves an important role as a storehouse for iron in the body. About 20-25 mg of iron is required each day for hemoglobin synthesis. To maintain iron homeostasis, transferrin and transferrin receptors are primarily involved in the uptake of iron into hepatocytes, ferritin in its storage, and ferroportin in its export. Moreover, hepcidin controls ferroportin and plays a central role in the iron metabolism. Excess "free" reactive iron produces damaging free radicals via Fenton or Harber-Weiss reactions. Produced free radicals attack cellular proteins, lipids and nucleic acid. Several detoxification system and anti-oxidant defense mechanisms exist to prevent cellular damage by free radicals. Excessive free radicals can lead to hepatocellular damage, liver fibrosis, and hepatocarcinogenesis.

journal_name

J Clin Biochem Nutr

authors

Takami T,Sakaida I

doi

10.3164/jcbn.10-76

subject

Has Abstract

pub_date

2011-03-01 00:00:00

pages

103-6

issue

2

eissn

0912-0009

issn

1880-5086

journal_volume

48

pub_type

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