melanin/necroză

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Herbal melanin modulates tumor necrosis factor alpha (TNF-alpha), interleukin 6 (IL-6) and vascular endothelial growth factor (VEGF) production.

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Recent studies have indicated that cytokines can enhance immunogenicity and promote tumor regression. However, the means for modulating cytokine production are not yet fully investigated. In this study we report the effects of a herbal melanin, extracted from Nigella sativa L., on the production of

Inhibition of nitric oxide and tumour necrosis factor-α production in peritoneal macrophages by Aspergillus nidulans melanin.

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The naturally occurring pigment, melanin is found in organisms of all phylogenetic kingdoms, including fungi, and exhibits a wide range of biological activities. Our objective was to investigate the effects of melanin extracted from the fungus Aspergillus nidulans on the production of the

Potential virulence factors of bacteria associated with tail fan necrosis in the spiny lobster, Jasus edwardsii.

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Tail fan necrosis (TFN) is a common condition found in commercially exploited spiny lobsters that greatly diminishes their commercial value. Bacteria possessing proteolytic, chitinolytic and lipolytic capabilities were associated with TFN in spiny lobsters, Jasus edwardsii. In this study, 69

Tolerance to melanin-associated antigen in autoimmune uveitis is mediated by CD4+CD25+ T-regulatory cells.

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Experimental autoimmune anterior uveitis (EAAU) serves as an animal model for human idiopathic AU, the most common form of intraocular inflammation of significant morbidity whose recurrence can lead to permanent vision loss. This study was undertaken to inhibit EAAU by inducing tolerance to

Human malignant melanomas with varying degrees of melanin content in nude mice: MR imaging, histopathology, and electron paramagnetic resonance.

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The etiology of the paramagnetic relaxation enhancement seen in malignant melanoma on proton magnetic resonance (MR) images has been the subject of many recent investigations and has been ascribed to iron from associated hemorrhage or chelated metal ions, rather than directly due to melanin. The

Effect of melanin on phosphorus T1S in human melanoma xenografts studied by 31P MRS.

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31P MRS resonance ratios of tumors depend on the T1S of the phosphorus compounds. The objective of the 31P MRS study reported here was to investigate whether the phosphorus T1S of melanomas are influenced by the presence of melanin. One amelanotic (COX-t) and one melanotic (ROX-t) human melanoma

Previously reported sonographic appearances of regional melanoma metastases are not likely due to necrosis.

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OBJECTIVE Sonography has proven to be a reliable tool in early detection of lymph node and in-transit cutaneous-subcutaneous metastases. Those metastases normally appear as hypoechoic or even anechoic lesions on sonography. It has been assumed that this appearance is due to necrosis of the lesions,

Cell death of melanophores in zebrafish trpm7 mutant embryos depends on melanin synthesis.

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Transient receptor potential melastatin 7 (TRPM7) is a broadly expressed, non-selective cation channel. Studies in cultured cells implicate TRPM7 in regulation of cell growth, spreading, and survival. However, zebrafish trpm7 homozygous mutants display death of melanophores and temporary paralysis,

Photothermal effect by 808-nm laser irradiation of melanin: a proof-of-concept study of photothermal therapy using B16-F10 melanotic melanoma growing in BALB/c mice.

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The photothermal effect is undergoing great interest due to advances in new photosensitizing materials and better-suited light sources, but studies are frequently hampered by the need to employ exogenous photothermal agents and expensive irradiation devices. Here we present a simple strategy based

Differential effects of dopamine melanin on norharman-induced toxicity in PC12 cells.

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The food contaminant norharman structurally resembles MPTP a compound that selectively damages pigmented brain areas. Both compounds are sequestered and retained in melanin-containing neurons. The aim of the study was to examine whether intracellular melanin can modulate the toxicity of norharman in

Protection effect of intracellular melanin from Lachnum YM156 and Haikunshenxi capsule combination on adenine-induced chronic renal failure in mice.

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This study aimed to elucidate the therapeutic effects of oral administration of intracellular melanin from Lachnum YM156 (LIM) on chronic renal failure (CRF) in mice. The cytotoxicity of LIM was evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. CRF was

Structural characterization, molecular modification and hepatoprotective effect of melanin from Lachnum YM226 on acute alcohol-induced liver injury in mice.

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In this paper, the possible structural formula of the intracellular homogeneous melanin of Lachnum YM226 (LM) was concluded based on an elemental assay, ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), mass spectrometry (MS)

Antitumor effects of melanin from Lachnum YM226 and its derivative in H22 tumor-bearing mice.

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In the present study, we investigated the anti-tumor activities of the intracellular homogeneous melanin (LM) of Lachnum YM226 and its derivative (ALM) on liver cancer using murine H22 hepatocarcinoma model. The results showed that LM and ALM (50 and 200 mg kg-1) could effectively inhibit tumor

Structure, Molecular Modification, and Anti-radiation Activity of Melanin from Lachnum YM156 on Ultraviolet B-Induced Injury in Mice.

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The purpose of this study was to examine the protective effects of intracellular homogeneous melanin produced by Lachnum YM156 (LIM) against ultraviolet B (UVB) induced damage in mice. The possible structural formula of the LIM was concluded based on elemental analysis, ultraviolet-visible

Tumor necrosis factor alpha-mediated inhibition of melanogenesis is dependent on nuclear factor kappa B activation.

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Melanogenesis is a physiological process resulting in the synthesis of melanin pigments which play a crucial protective role against skin photocarcinogenesis. In vivo, solar ultraviolet light triggers the secretion of numerous keratinocyte-derived factors that are implicated in the regulation of

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