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Ferroportin-1, also known as solute carrier family 40 member 1 (SLC40A1) or iron-regulated transporter 1 (IREG1), is a protein that in humans is encoded by the SLC40A1 gene. [5] Ferroportin is a transmembrane protein that transports iron from the inside of a cell to the outside of the cell. Ferroportin is the only known iron exporter. [6]
A major source of transferrin secretion in the brain is the choroid plexus in the ventricular system. [15] The main role of transferrin is to deliver iron from absorption centers in the duodenum and white blood cell macrophages to all tissues. Transferrin plays a key role in areas where erythropoiesis and active cell division occur. [16]
Ferroportin is upregulated in the reticuloendothelial macrophages after phagocytosis occurs so that iron from the degraded red blood cells can be released into the bloodstream and transported to other types of cells as needed. Hepcidin, a protein synthesized in the liver in response to iron or inflammation, is a regulator of ferroportin ...
It means that transferrin has the capacity to transport approximately from 1.40 to 1.49 mg of iron per gram of transferrin present in the blood. [ 2 ] It is performed by drawing blood and measuring the maximum amount of iron that it can carry, which indirectly measures transferrin [ 3 ] since transferrin is the most dynamic carrier.
The reserves of iron in industrialized countries tend to be lower in children and women of child-bearing age than in men and in the elderly. Women who must use their stores to compensate for iron lost through menstruation, pregnancy or lactation have lower non-hemoglobin body stores, which may consist of 500 mg, or even less.
In women, iron deficiency anemia has also been linked to mortality during pregnancy, lower birth rates, ...
After absorption, the iron from preparation becomes part of the iron pool in the body. Upon stimulation, the reduction of iron storage Fe3+ in the enterocyte to Fe2+ ferroportin allows the passage of iron through the cell membrane for export. In the blood, ferroportin is then converted to transferrin to reach other tissues. [14]
Women who must use their stores to compensate for iron lost through menstruation, pregnancy or lactation have lower non-hemoglobin body stores, which may consist of 500 mg, or even less. Of the body's total iron content, about 400 mg is devoted to cellular proteins that use iron for important cellular processes like storing oxygen (myoglobin ...