Does hepatomegaly alter iron-dependent oxidative effects in human plasma?

Abstract:

:A four-fold increase in the iron content of normal subjects was detected in plasma after 5 hours of iron administration. Iron supplementation had a surprisingly erratic effect on four patients with hepatomegaly secondary to heart insufficiency, since the increase in the iron content in the plasma after iron-dextran administration was either within the control range or significantly lower, independently of the initial values. Thiobarbituric acid reactive substances (TBARS) content was 2.5 +/- 0.2 and 4.3 +/- 0.4 microM for control and hepatomegalic subjects, respectively. The TBARS basal level was increased by iron supplementation. The difference between TBARS content in hepatomegalic and control subjects, after 5 hours of iron administration, was increased by 50% as compared to the difference in the basal content of TBARS. alpha-Tocopherol (alpha-T) content in plasma from subjects with hepatomegaly showed a significant decrease (-41%) as compared to control subjects. No significant difference over the basal level of alpha-T was measured after 5 hours of iron administration in any subject. The data presented here suggest that abnormal liver condition affects iron-dependent oxidative stress in plasma. Moreover, alpha-T does not seem to be the main antioxidant to control iron-dependent oxidative stress in plasma.

journal_name

Hum Exp Toxicol

authors

Galleano M,Lemberg A,Puntarulo S

doi

10.1191/0960327103ht372oa

subject

Has Abstract

pub_date

2003-07-01 00:00:00

pages

401-5

issue

7

eissn

0960-3271

issn

1477-0903

journal_volume

22

pub_type

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