Pigment Cells
Mostrando 1-12 de 480 artigos, teses e dissertações.
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1. Structure of prodigiosin from Serratia marcescens NJZT-1 and its cytotoxicity on TSC2-null cells
Abstract Prodigiosin, a secondary metabolite extracted from Serratia marcescens (S. marcescens), could induce apoptosis in various cancer cells, with however low toxicity on normal cells. The red pigment was extracted from a strain S. marcescens NJZT-1 isolated from soil, which had antibacterial activity. Spectral analyses (LC-ESI-MS, UV-VIS spectrophotometr
Food Sci. Technol. Publicado em: 2021-06
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2. Influence of High Light Intensity and Nitrate Deprivation on Growth and Biochemical Composition of the Marine Microalgae Isochrysis galbana
Abstract Isochrysis galbana is a brown microalgae widely used as a feed for marine organism in aquaculture. The aim of present study is to investigate the growth, biochemical composition, fatty acid profile, photosynthetic parameters and antioxidant activity (radical scavenging activity) of Isochrysis galbana cells cultivated under different levels (sub-opti
Braz. arch. biol. technol.. Publicado em: 20/12/2019
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3. Using prodigiosin against some gram-positive and gram-negative bacteria and Trypanosoma cruzi
Abstract Background: This work aimed to explore the action of natural prodigiosin on both bacterial organisms and Trypanosoma cruzi cells. Methods: Natural prodigiosin pigment was extracted and purified from cultures of Serratia marcescens. Two media, peanut broth and peptone glycerol broth, both recommended in the literature for prodigiosin production, we
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 03/06/2019
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4. Neurological diseases in cattle caused by plants and mycotoxins in Santa Catarina state, Brazil
RESUMO: Descrevem-se os aspectos epidemiológicos e clinico-patológicos de 25 surtos de enfermidade neurológica em bovinos no estado de Santa Catarina causadas por plantas e micotoxinas. Destes, seis corresponderam a intoxicação por Sida carpinifolia, cinco por Solanum fastigiatum, cinco por Phalaris angusta, três por Claviceps paspali, três por Clavic
Pesq. Vet. Bras.. Publicado em: 02/05/2019
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5. Pigmented squamous cell carcinoma: case report and importance of differential diagnosis
Abstract: A few cases of pigmented squamous cell carcinoma affecting the skin and the ocular and oral mucosa of the elderly have been described in the literature. The disease manifests itself as papular and nodular erythematous or pigmented lesions. The main clinical differential diagnoses are pigmented basal cell carcinoma and melanoma. Histopathological ex
An. Bras. Dermatol.. Publicado em: 2018-02
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6. Ultrastructure of the dermal chromatophores in the Fringe-toed lizard, Acanthodactylus orientalis
ABSTRACT Histology and electron microscopic studies of the dorsal skin of the Fringe-toed lizard, Acanthodactylus orientalis Angel, 1936, showed three types of dermal chromatophores: xanthophores, iridophores and melanophores. These pigment cells were observed in vertical combination, with an uppermost layer of xanthophores, an intermediate layer of iridopho
Zoologia (Curitiba). Publicado em: 08/05/2017
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7. In vitro Anticancer Property of Yellow Pigment fromStreptomyces griseoaurantiacus JUACT 01
ABSTRACT Despite the complications in isolation of pigments, microbial pigments are increasingly gaining the attention of researchers because of their broad range therapeutic potentials, especially against cancer. In this study the cytotoxic and anti proliferative potentials of yellow pigment from Streptomyces griseoaurantiacus JUACT 01 isolated from soil ar
Braz. arch. biol. technol.. Publicado em: 2015-12
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8. T-cell-predominant lymphoid hyperplasia in a tattoo
Cutaneous lymphoid hyperplasia (CLH) can be idiopathic or secondary to external stimuli, and is considered rare in tattoos. The infiltrate can be predominantly of B or T-cells, the latter being seldom reported in tattoos. We present a case of a predominantly T CLH, secondary to the black pigment of tattooing in a 35-year-old patient, with a dense infiltrate
An. Bras. Dermatol.. Publicado em: 2014-12
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9. Antitumor activity of C-phycocyanin from Arthronema africanum (Cyanophyceae)
Pure C-phycocyanin (C-PC) was isolated from Arthronema africanumto evaluate its potential antitumor effects in vivo and in vitro. Experimental myeloid Graffi tumor in hamsters was used as a model. The cell proliferation assay showed that C-PC treatment, at concentration of 100 µg mL-1 for 24 h, significantly inhibited the growth of Graffi tumor cells (51.4%
Braz. arch. biol. technol.. Publicado em: 29/04/2014
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10. SIRT1 negatively regulates amyloid-beta-induced inflammation via the NF-κB pathway
Chronic inflammation induced by amyloid-beta (Aβ) plays a key role in the development of age-related macular degeneration (AMD), and matrix metalloproteinase-9 (MMP-9), interleukin (IL)-6, and IL-8 may be associated with chronic inflammation in AMD. Sirtuin 1 (SIRT1) regulates inflammation via inhibition of nuclear factor-kappa B (NF-κB) signaling, and res
Braz J Med Biol Res. Publicado em: 2013-08
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11. Efeito de α-MSH sobre a expressão gênica de rodopsina, tirosinase e do receptor de α-MSH, subtipo MC1R, em melanócito B16 de Mus musculus / α-MSH effects on rhodopsin, tyrosinase and MC1R genes in B16 Mus musculus melanocytes
A coloração dos vertebrados deve-se a presença de pigmentos, sintetizados e/ou armazenados em células denominadas células pigmentares cutâneas. A mudança de cor nos vertebrados é principalmente regulada por α-MSH e uma família de enzimas melanossômicas, que incluem tirosinase e as proteínas relacionadas à tirosinase 1 e 2 (TRP-1 e TRP-2, re
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/09/2012
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12. Influence of rosmarinic acid and Salvia officinalis extracts on melanogenesis of B16F10 cells
Melanin is a photoprotective skin pigment, and pathologies characterized by hypo or hyperpigmentation are common. New compounds that regulate melanogenesis are, therefore, opportune, and many natural products with this property, as polyphenols, have been described. Salvia officinalis L., Lamiaceae, is a widely used food spice that contains high amounts of ph
Rev. bras. farmacogn.. Publicado em: 22/11/2012