Iron and the liver: subcellular distribution of iron and decreased microsomal cytochrome P-450 in livers of iron-loaded rats.

Abstract:

:To understand better the intracellular iron distribution and metabolic consequences of chronic hepatic iron overload, rats were given large doses of iron dextran or ferric citrate intraperitoneally. They accumulated large quantities of iron within Kupffer cells and hepatocytes. The relative subcellular iron distributions were similar in controls and iron-loaded rats, despite a ten- to 20-fold difference in hepatic iron concentration. Electron microscopy of whole liver and subcellular particulate fractions suggested that iron was present in highest concentration in lysosomes, which were rendered more labile by its presence. Nevertheless, quantitative iron determinations on all subcellular fractions, obtained by two preparative methods, showed that most of the iron was present in the "soluble" fraction. The amount of iron in the "microsomal" fraction varied, depending on the techniques used for preparation of this fraction. Cytochrome P-450 and total heme concentrations were decreased 40% to 50% in microsomes isolated from iron-loaded livers.

journal_name

Arch Pathol Lab Med

authors

Bonkowsky HL,Carpenter SJ,Healey JF

subject

Has Abstract

pub_date

1979-01-01 00:00:00

pages

21-9

issue

1

eissn

0003-9985

issn

1543-2165

journal_volume

103

pub_type

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