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Iron can be stored in ferritin as ferric iron due to the ferroxidase activity of the ferritin heavy chain. [28] Dysfunctional ferritin may accumulate as hemosiderin, which can be problematic in cases of iron overload. [29] The ferritin storage iron pool is much larger than the labile iron pool, ranging in concentration from 0.7 mM to 3.6 mM. [25]
However this is unreliable as method of diagnosis since some patients show typical serum ferritin levels even at the latest stages of neuroferritinopathy. [1] Cerebral spinal fluid tests also are typically normal. [8] Ferritin aggregates found in the skin, liver, kidney and muscle tissues may help in diagnosing neuroferritinopathy. [8]
Ferritin genes are highly conserved between species. All vertebrate ferritin genes have three introns and four exons. [8] In human ferritin, introns are present between amino acid residues 14 and 15, 34 and 35, and 82 and 83; in addition, there are one to two hundred untranslated bases at either end of the combined exons. [9]
[34] [35] [36] In premenopausal females, normal range of serum ferritin is between 12 and 150 [34] or 200 [35] ng/mL (330 or 440 pmol/L). [36] In those with hemochromatosis, the serum ferritin level correlates with the degree of iron overload. [7] Ferritin levels are usually monitored serially in those with hemochromatosis to assess response to ...
Serum ferritin is a low cost, readily available, and minimally invasive method for assessing body iron stores. However, the major problem with using it as an indicator of hemosiderosis is that it can be elevated in a range of other medical conditions unrelated to iron levels including infection, inflammation, fever, liver disease, renal disease ...
The ideal is to increase the body's iron deposits, measured as levels of ferritin in serum, with the aim of reaching a ferritin value between 30 and 100 ng/mL. A clinical study has shown an increase in ferritin levels in those taking iron compared with others receiving a placebo. [11]
Phlebotomy (or bloodletting) is usually done at a weekly or each two weeks interval until ferritin levels are 50 μg/L or less. To prevent iron reaccumulation, subsequent phlebotomies are normally carried out about once every three to four months for males, and twice a year for females to keep the serum ferritin between 50 and 100 ug/L [67]
Laboratory tests such as measuring the peak serum iron level after 4 to 6 hours of ingestion can be useful in determining the severity of iron toxicity. [4] In general, levels below 350mcg/dL are associated with more mild iron poisoning while upper levels above 500mcg/dL are associated with more severe iron poisoning. [ 3 ]