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Allergic Contact Dermatitis: From the identification of skin sensitizers to the...

Brites, Gonçalo Sousa

Tese de Doutoramento em Ciências Farmacêuticas apresentada à Faculdade de Farmácia; A dermatite alérgica de contato (DCA), é uma manifestação clínica da sensibilização da pele, e a doença ocupacional mais prevalente em humanos, com uma taxa de prevalência de 27% na Europa e entre 15-20% na população em geral. Esta elevada prevalência, aliada ao número crescente de sensibilizantes cutâneos a que a humanidade est...


Chemical Composition and Effect against Skin Alterations of Bioactive Extracts ...

Moreira, Patrícia; Sousa, Fábio Jesus; Matos, Patrícia; Brites, Gonçalo Sousa; Gonçalves, Maria José; Cavaleiro, Carlos; Figueirinha, Artur

Eucalyptus globulus is planted extensively for pulp, paper and wood production. Although bioactive compounds obtained from its biomass are used as cosmetics ingredients, the skin effects were not yet fully explored. In order to fill this gap, this work aimed to study the protective effect against skin damage provided by the essential oil (EO) obtained from the hydrodistillation of Eucalyptus globulus leaves, an...


Ring-Fused meso-Tetraarylchlorins as Auspicious PDT Sensitizers: Synthesis, Str...

Laranjo, Mafalda; Pereira, Nelson A. M.; Oliveira, Andreia S. R.; Aguiar, Márcia Campos; Brites, Gonçalo Sousa; Nascimento, Bruno F. O.

Novel 4,5,6,7-tetrahydropyrazolo[1,5-a]pyridine-fused meso-tetraarylchlorins, with different degrees of hydrophilicity (with methyl ester, hydroxymethyl, and carboxylic acid moieties), have been synthesized and their photophysical characterization as well as in vitro photocytotoxicity assessment against human melanoma and esophageal and bladder carcinomas was carried out. An integrated analysis of the photosens...


Novel fluorinated ring-fused chlorins as promising PDT agents against melanoma ...

Pereira, Nelson A. M.; Laranjo, Mafalda; Nascimento, Bruno F. O.; Simões, João C. S.; Pina, João; Costa, Bruna D. P.; Brites, Gonçalo Sousa; Braz, João

Investigation of novel 4,5,6,7-tetrahydropyrazolo[1,5-a]pyridine-fused chlorins, derived from 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin, as PDT agents against melanoma and esophagus cancer is disclosed. Diol and diester fluorinated ring-fused chlorins, including derivatives with 2-(2-hydroxyethoxy)ethanamino groups at the phenyl rings, were obtained via a two-step methodology, combining SNAr and [8π + 2π]...


Terapia fotodinâmica em combinação com quimioterapia : uma opção no osteossarcoma

Brites, Gonçalo Sousa

Dissertação de mestrado em Biotecnologia Farmacêutica, apresentada à Faculdade de Farmácia da Universidade de Coimbra; O osteossarcoma é o tipo de sarcoma mais comum e corresponde acerca de 45% de todos os cancros ósseos. A toxicidade dos fármacos antineoplásicos convencionalmente utilizados no seu tratamento é muitas vezes limitante da dose aplicada ou até mesmo a razão para a interrupção da quimioterapia, sen...


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