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      Comparative Analysis of Serum Copper, Iron, Ceruloplasmin, and Transferrin Levels in Mild and Severe Psoriasis Vulgaris in Iranian Patients

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          Abstract

          Background:

          There is a great body of evidence indicating that some inflammatory skin diseases, such as psoriasis, are mediated by oxidative stress. Trace metals have been shown to be involved in oxidative stress response. Altered trace metal homeostasis in psoriasis has been studied. However, limited number of studies has focused on the involvement of metal binding proteins in psoriasis.

          Materials and Methods:

          In a case control-study, serum levels of Iron (Fe), Copper (Cu), Transferrin (Trf), and Ceruloplasmin (Cp) were measured in 40 psoriasis patients and matched healthy controls. The severity of the disease was measured using psoriasis area and severity index (PASI), and the association of severity based on PASI score and measured elements and proteins was investigated.

          Results:

          Forty patients with psoriasis (mild: 14 and moderate to severe: 26) and 40 healthy controls were included in this study. The serum Fe, Trf, and Cu/Cp levels of the patients with psoriasis were statistically lower compared with those of the controls; serum levels of Cp was elevated in patients with psoriasis compared to controls ( P = 0.02). No significant difference was observed between the two groups regarding serum levels of Cu ( P = 0.07).

          Conclusion:

          Cu/Cp ratio of the patients with psoriasis was statistically lower compared with those of the controls.

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          Most cited references17

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          Copper intake and assessment of copper status.

          D Milne (1998)
          The diagnosis of marginal copper deficiency has not been perfected despite an increased understanding of the physiologic roles of copper. The use of nonstandardized procedures and the effects of factors other than copper nutriture have impeded identification of an ideal indicator of copper nutritional status in humans. A review of studies of experimental copper deprivation conducted in adult humans over the past 12 y indicated that between 1.0 and 1.25 mg Cu/d is needed by adults for copper maintenance for periods of up to 6 mo and that < or = 2.6 mg Cu/d for periods of up to 42 d is not sufficient for recovery from copper deprivation. Copper-containing enzymes in blood cells, such as erythrocyte superoxide dismutase and platelet cytochrome-c oxidase, may be better indicators of metabolically active copper and copper stores than plasma concentrations of copper or ceruloplasmin because the enzyme activities are sensitive to changes in copper stores and are not as sensitive to factors not related to copper nutriture.
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            Ceruloplasmin and cardiovascular disease.

            Transition metal ion-mediated oxidation is a commonly used model system for studies of the chemical, structural, and functional modifications of low-density lipoprotein (LDL). The physiological relevance of studies using free metal ions is unclear and has led to an exploration of free metal ion-independent mechanisms of oxidation. We and others have investigated the role of human ceruloplasmin (Cp) in oxidative processes because it the principal copper-containing protein in serum. There is an abundance of epidemiological data that suggests that serum Cp may be an important risk factor predicting myocardial infarction and cardiovascular disease. Biochemical studies have shown that Cp is a potent catalyst of LDL oxidation in vitro. The pro-oxidant activity of Cp requires an intact structure, and a single copper atom at the surface of the protein, near His(426), is required for LDL oxidation. Under conditions where inhibitory protein (such as albumin) is present, LDL oxidation by Cp is optimal in the presence of superoxide, which reduces the surface copper atom of Cp. Cultured vascular endothelial and smooth muscle cells also oxidize LDL in the presence of Cp. Superoxide release by these cells is a critical factor regulating the rate of oxidation. Cultured monocytic cells, when activated by zymosan, can oxidize LDL, but these cells are unique in their secretion of Cp. Inhibitor studies using Cp-specific antibodies and antisense oligonucleotides show that Cp is a major contributor to LDL oxidation by these cells. The role of Cp in lipoprotein oxidation and atherosclerotic lesion progression in vivo has not been directly assessed and is an important area for future studies.
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              Structure/function overview of proteins involved in iron storage and transport.

              Iron, the major trace element in the body, is an essential component of many proteins and enzymes. As low-molecular-weight iron is potentially toxic to cells, higher organisms express a number of proteins for the transport and storage of iron. We review our current understanding of the intestinal absorption of iron in the light of recently identified membrane proteins, namely the ferrric reductase, Dcytb, the two iron(II) transport proteins, DMT1 and ferroportin/Ireg1, and hephaestin, the membrane-bound homologue of the ferroxidase ceruloplasmin. Two types of mammalian transferrin receptor, TfR1 and TfR2, are now known to exist. The structure of TfR1 and its role in the process of receptor-mediated cellular uptake of iron are presented together with structural information on the iron storage protein ferritin. Mechanisms for the regulation of levels of TfR1 and ferritin, as well as other proteins involved in iron homeostasis, are discussed. Our current knowledge and understanding of the structure of members of the transferrin family of iron-binding proteins and the nature of the iron-binding centres in transferrins is presented, together with information on the processes of iron-uptake and iron-release by transferrin and a summary of the elements that have been found to bind to transferrins.
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                Author and article information

                Journal
                Indian Dermatol Online J
                Indian Dermatol Online J
                IDOJ
                Indian Dermatology Online Journal
                Medknow Publications & Media Pvt Ltd (India )
                2229-5178
                2249-5673
                Jul-Aug 2017
                : 8
                : 4
                : 250-253
                Affiliations
                [1] Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
                [1 ] Department of Epidemiology and Biostatistics, Tehran University of Medical Sciences, Tehran, Iran
                Author notes
                Address for correspondence: Dr. Nastaran Namazi, Skin Research Center, Shahid Beheshti University of Medical Sciences, Shohada-e-Tajrish Hospital, Shahrdari St., Tajrish Sq, Iran. E-mail: nastaran.namazi.md@ 123456gmail.com
                Article
                IDOJ-8-250
                10.4103/idoj.IDOJ_230_16
                5518575
                80b5bba8-8c35-4a53-b81d-c9ab7e825f5b
                Copyright: © 2017 Indian Dermatology Online Journal

                This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

                History
                : June 2016
                : August 2016
                Categories
                Original Article

                Dermatology
                ceruloplasmin,copper,psoriasis,trace element
                Dermatology
                ceruloplasmin, copper, psoriasis, trace element

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