vitiligo/tyrosine

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Association of protein tyrosine phosphatase, non-receptor type 22 +1858C→T polymorphism and susceptibility to vitiligo: Systematic review and meta-analysis.

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BACKGROUND Protein tyrosine phosphatase, non-receptor type 22 gene, which translates to lymphoid tyrosine phosphatase, is considered to be a susceptibility gene marker associated with several autoimmune diseases. Several studies have demonstrated the association of protein tyrosine phosphatase,

Protein tyrosine phosphatase PTPN22 +1858C/T polymorphism is associated with active vitiligo.

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Vitiligo is characterized by a skin depigmentation disorder resulting from an autoimmune response targeting melanocytes. Within the genetic factors involved in the development of the vitiligo immune response, various genes in the major histocompatibility complex (MHC) and non-MHC loci have been

A single-nucleotide polymorphism in the gene encoding lymphoid protein tyrosine phosphatase (PTPN22) confers susceptibility to generalised vitiligo.

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Vitiligo is an acquired hypomelanotic skin disorder resulting from the loss of functional melanocytes from the cutaneous epidermis and autoimmunity has been suggested to play a part in its pathogenesis. Recently, the missense R620W polymorphism in the PTPN22 gene, which encodes lymphoid protein

Epitopes, avidity and IgG subclasses of tyrosine hydroxylase autoantibodies in vitiligo and alopecia areata patients.

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BACKGROUND We previously detected antibodies against tyrosine hydroxylase (TH) in 23% of patients with nonsegmental vitiligo and in 19% of patients with alopecia areata (AA). OBJECTIVE To identify TH epitopes recognized by TH antibodies in patients with vitiligo and AA. METHODS Recombinant plasmids

Demonstration of tyrosinase in the vitiligo skin of human beings by a sensitive fluorometric method as well as by 14C(U)-L-tyrosine incorporation into melanin.

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Tyrosinase activity (Monophenol, dihydroxyphenylalanine: oxygen oxidoreductase EC 1.14.18.1) in vitiligo and normal epidermal homogenates of skin from human beings was measured by estimating beta 3,4-dihydroxyphenylalanine (dopa) by a highly sensitive fluorometric method described in this paper. The

Autoantibodies against tyrosine hydroxylase in patients with non-segmental (generalised) vitiligo.

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Vitiligo is an acquired idiopathic hypomelanotic skin disorder characterised by depigmented macules because of loss of cutaneous melanocytes. Although the exact cause of vitiligo remains obscure, evidence suggests that autoimmunity plays a role in the pathogenesis of the disease. Previously,

Association of Functional Polymorphism in Protein Tyrosine Phosphatase Nonreceptor 22 (PTPN22) Gene with Vitiligo.

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The protein tyrosine phosphatase nonreceptor 22 (PTPN22) is associated with susceptibility to autoimmune diseases. The functional polymorphism in PTPN22 at 1857 is a strong risk factor for vitiligo susceptibility in Europeans; however, controversy exits in other populations. Present

Reaction of dendritic melanocytes in vitiligo to the substrates of tyrosine metabolism.

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Frozen sections of vitiliginous skin were treated with the substrates involved in melanogenesis and adrenergic activity to study the effect of changing chemical milieu on the biphasic dendritic melanocytes. The substrates used are tyrosine, DOPA, tyrosine + DOPA, dopamine, adrenalin and cupric ions.

[Oxidative catabolism of tyrosine in vitiligo].

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Association between polymorphisms of discoidin domain receptor tyrosine kinase 1 (DDR1) and non-segmental vitiligo in the Korean population.

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Defective tetrahydrobiopterin and catecholamine biosynthesis in the depigmentation disorder vitiligo.

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Patients with the depigmentation disorder vitiligo lack the capacity to synthesize the melanins from L-tyrosine via the essential activity of tyrosinase. The aim of this study has been to examine both the supply of the substrate (L-tyrosine) and the regulation of tyrosinase in the epidermis of

Protein tyrosine phosphatase PTPN22 in human autoimmunity.

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The discovery that a single-nucleotide polymorphism (SNP) in lymphoid tyrosine phosphatase (LYP), encoded by the PTPN22 gene, is associated with type 1 diabetes (T1D) has now been verified by numerous studies and has been expanded to rheumatoid arthritis, juvenile rheumatoid arthritis (JRA),

Vitiligo Adverse Event Observed in a Patient With Durable Complete Response After Nivolumab for Metastatic Renal Cell Carcinoma.

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Background: Renal cell carcinoma is the third most prevalent urological cancer worldwide and about 30% of patients present with metastatic disease at the time of diagnosis. Systemic treatments for metastatic renal cell carcinoma have improved recently. Vascular endothelial growth factor

Oxidation of tyrosine photoinduced by pterin in aqueous solution.

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Pterins, heterocyclic compounds widespread in biological systems, accumulate in the skin of patients suffering from vitiligo, a chronic depigmentation disorder. Pterins have been previously identified as good photosensitizers under UV-A irradiation. In this work, we have investigated the ability of

The occurrence of cutaneous nerve endings and neuropeptides in vitiligo vulgaris: a case-control study.

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Pioneering studies both in humans and animals have demonstrated an association between the peripheral nervous system and epidermal melanocyte destruction. The presence of certain neuropeptides and neuronal structural markers in peripheral nerve fibres was investigated in involved and uninvolved

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