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Melo TS, Koch EBA, Andrade ARS, Travassos MLO, Peres MCL, Delabie JHC. Ants (Hymenoptera: Formicidae) in different green areas in the metropolitan region of Salvador, Bahia state, Brazil. BRAZ J BIOL 2021; 82:e236269. [PMID: 33825757 DOI: 10.1590/1519-6984.236269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 07/23/2020] [Indexed: 11/22/2022] Open
Affiliation(s)
- T S Melo
- Universidade Federal da Bahia - UFBA, Programa de Pós-graduação em Ecologia, Salvador, BA, Brasil.,Laboratório de Mirmecologia, Convênio entre Comissão Executiva do Plano da Lavoura Cacaueira - CEPLAC e Universidade Estadual de Santa Cruz - UESC, Ilhéus, BA, Brasil.,Universidade Católica do Salvador - UCSal, Centro de Ecologia e Conservação Animal, Salvador, BA, Brasil
| | - E B A Koch
- Universidade Federal da Bahia - UFBA, Programa de Pós-graduação em Ecologia, Salvador, BA, Brasil.,Laboratório de Mirmecologia, Convênio entre Comissão Executiva do Plano da Lavoura Cacaueira - CEPLAC e Universidade Estadual de Santa Cruz - UESC, Ilhéus, BA, Brasil
| | - A R S Andrade
- Universidade Federal da Bahia - UFBA, Programa de Pós-graduação em Ecologia, Salvador, BA, Brasil.,Laboratório de Mirmecologia, Convênio entre Comissão Executiva do Plano da Lavoura Cacaueira - CEPLAC e Universidade Estadual de Santa Cruz - UESC, Ilhéus, BA, Brasil.,Universidade Católica do Salvador - UCSal, Centro de Ecologia e Conservação Animal, Salvador, BA, Brasil
| | - M L O Travassos
- Universidade Federal da Bahia - UFBA, Programa de Pós-graduação em Ecologia, Salvador, BA, Brasil.,Laboratório de Mirmecologia, Convênio entre Comissão Executiva do Plano da Lavoura Cacaueira - CEPLAC e Universidade Estadual de Santa Cruz - UESC, Ilhéus, BA, Brasil.,Universidade Católica do Salvador - UCSal, Centro de Ecologia e Conservação Animal, Salvador, BA, Brasil
| | - M C L Peres
- Universidade Católica do Salvador - UCSal, Centro de Ecologia e Conservação Animal, Salvador, BA, Brasil
| | - J H C Delabie
- Universidade Federal da Bahia - UFBA, Programa de Pós-graduação em Ecologia, Salvador, BA, Brasil.,Laboratório de Mirmecologia, Convênio entre Comissão Executiva do Plano da Lavoura Cacaueira - CEPLAC e Universidade Estadual de Santa Cruz - UESC, Ilhéus, BA, Brasil
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Melo L, Melo TS. Pioneer women in the development of toxicology in Brazil. ACTA ACUST UNITED AC 2021; 54:e11177. [PMID: 33825779 PMCID: PMC8021228 DOI: 10.1590/1414-431x202011177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 02/03/2021] [Indexed: 11/21/2022]
Abstract
Women have always played an important role in the development of toxicology all over the world. Specifically in Brazil, toxicology has had greater female representation than other countries, but women's participation at high hierarchical levels is low. Although more than 62% of the members of the Brazilian Society of Toxicology are women, only 7 out of the 22 presidents have been women throughout its 48 years of existence. This article aims to celebrate women in the field of toxicology in Brazil, based on interviews with five of these scientists who have changed the field of toxicology in Brazil as we know it today, each in their specific sub-areas. These women are: Dr. Ester de Camargo Fonseca Moraes, Dr. Silvia Berlanga de Moraes Barros, Dr. Alice Aparecida da Matta Chasin, Dr. Gisela de Aragão Umbuzeiro, and Dr. Tania Marcourakis. They are not only pioneers but they are also examples of admirable persistence in fighting the adversities presented to them. They broke the glass ceiling and opened doors for future generations of women in science. We hope that this article helps inspire women in their careers in toxicology.
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Affiliation(s)
- L Melo
- Laboratory of Investigative Toxicology and Pathology, Department of Environmental and Occupational Health, School of Public Health, Indiana University, Bloomington, IN, USA
| | - T S Melo
- Centro de Ciências Biológicas e da Saúde, Universidade Presbiteriana Mackenzie, São Paulo, SP, Brasil
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Melo TS, Moreira EF, Lopes MVA, Andrade ARS, Brescovit AD, Peres MCL, Delabie JHC. Influence of Urban Landscape on Ants and Spiders Richness and Composition in Forests. Neotrop Entomol 2021; 50:32-45. [PMID: 33501630 DOI: 10.1007/s13744-020-00824-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 10/29/2020] [Indexed: 06/12/2023]
Abstract
As large amounts of natural environments are lost due to urbanization, the role of remnant native vegetation in the preservation of biodiversity has become even more significant. Remnant native forest patches are essential refugia for flora and fauna and are crucial for the maintenance of ecosystem processes in urbanized landscapes. We evaluated the influence of landscape structure on ants and spiders associated with Atlantic Forest remnants in urban landscapes. We sampled 14 forest areas in the Metropolitan Region of Salvador and tested the effect of the landscapes' proportion of forest cover, mean landscape isolation, and mean landscape shape complexity on the taxonomic and functional richness and the community composition of both groups. The species collected were classified into functional groups based on behavioral attributes and environmental preferences. Overall, there were strong adverse effects of forest loss, decreased connectivity, and an increase in edge effects associated with the mean shape complexity of the forest remnants. However, the spiders responded to all three landscape structure characteristics whereas the ants only responded to the landscape mean shape complexity. Our findings indicate that the maintenance of urban forest habitats is essential for the conservation of biodiversity in the Metropolitan Region of Salvador and the preservation of ecological functions performed by species within the forest areas.
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Affiliation(s)
- T S Melo
- Programa de Pós-graduação em Ecologia, Univ Federal da Bahia, Salvador, BA, Brasil.
- Centro de Ecologia e Conservação Animal, Univ Católica do Salvador, Salvador, BA, Brasil.
| | - E F Moreira
- Programa de Pós-graduação em Ecologia, Univ Federal da Bahia, Salvador, BA, Brasil
- National Institute of Science and Technology in Interdisciplinary and Transdisciplinary Studies in Ecology and Evolution, Salvador, BA, Brasil
| | - M V A Lopes
- Centro de Ecologia e Conservação Animal, Univ Católica do Salvador, Salvador, BA, Brasil
- Programa de Pós-graduação em Ecologia e Evolução, Univ Estadual de Feira de Santana, Feira de Santana, BA, Brasil
| | - A R S Andrade
- Programa de Pós-graduação em Ecologia, Univ Federal da Bahia, Salvador, BA, Brasil
- Centro de Ecologia e Conservação Animal, Univ Católica do Salvador, Salvador, BA, Brasil
| | - A D Brescovit
- Lab de Coleções Zoológicas, Instituto Butantan, Sao Paulo, SP, Brasil
| | - M C L Peres
- Centro de Ecologia e Conservação Animal, Univ Católica do Salvador, Salvador, BA, Brasil
| | - J H C Delabie
- Programa de Pós-graduação em Ecologia, Univ Federal da Bahia, Salvador, BA, Brasil
- Lab de Mirmecologia, Convênio UESC/CEPLAC, CEPEC-CEPLAC, Itabuna, Itabuna, Bahia, Brasil
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Sousa C, Mazière C, Melo TS, Vincent-Fiquet O, Rogez JC, Santus R, Mazière JC. 8-Methoxypsoralen potentiates the photocytotoxic effect of Photofrin II towards EMT-6 murine tumor cells. Cancer Lett 1998; 128:177-82. [PMID: 9683280 DOI: 10.1016/s0304-3835(98)00069-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Pretreatment of EMT-6 murine tumor cells for 24 h with 10(-4) M 8-methoxypsoralen (8-MOP) increased the photocytotoxicity of Photofrin II (P2) after cell exposure to low doses (1-1.5 J/cm2) of UVA by two- to three-fold. 8-MOP alone had no cytotoxic action under these experimental conditions and did not significantly change the amount of P2 recovered in cells. 8-MOP enhanced the lipid peroxidation end product formation measured as thiobarbituric acid reactive substances (TBARS) during cell photosensitization by P2. The psoralen alone also slightly increased the TBARS level after UVA exposure. These results suggest that 8-MOP, albeit non-photocytotoxic by itself under our experimental conditions, could enhance the efficiency of P2 by increasing cellular lipid peroxidation following light exposure.
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Affiliation(s)
- C Sousa
- Centro de Quimica Fisica Molecular, Instituto Superior Técnico, Lisboa, Portugal
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Sousa C, Melo TS, Mazière JC, Santus R. PUVA-induced cell mortality in NCTC 2544 keratinocytes: is it related to the microenvironmental properties of the excited states of psoralens? Photochem Photobiol 1998; 67:561-4. [PMID: 9613239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The phototoxic effect of psoralen (PSO), 5-methoxypsoralen (5MOP), 8-methoxypsoralen (8MOP) and 4,5',8-trimetylpsoralen (TMP) has been compared on the NCTC 2544 keratinocyte cell line in terms of cell mortality and lipid peroxidation. The order of effectiveness for cell photokilling is TMP, 5MOP >> 8MOP, PSO, whereas a little lipid peroxidation is observed for the four psoralens under study. Oxygen-independent membrane damage seem to play a key role in the lethal photodamage because the biological effectiveness of the most hydrophobic lipid-soluble psoralens, TMP and 5MOP, is about an order of magnitude higher than that of the more water-soluble 8MOP and PSO. In relation to this hypothesis, and in contrast to 8MOP, TMP is readily extracted from cells by ethyl acetate, a good membrane solvent, as shown by GC/MS analysis on cell extracts. The results are discussed in terms of the highly microenvironment-dependent photophysical properties of psoralens. By the measure of the intracellular psoralen concentration, the neutral red uptake and the lipid peroxidation products, this work provides evidence that PUVA therapy-mediated cell mortality is a lipid peroxidation-independent phenomenon.
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Affiliation(s)
- C Sousa
- Centro de Química Física Molecular, Instituto Superior Técnico, Lisboa, Portugal
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Melo TS, Dubertret L, Prognon P, Gond A, Mahuzier G, Santus R. Physicochemical properties and stability of anthralin in model systems and human skin. J Invest Dermatol 1983; 80:1-6. [PMID: 6848605 DOI: 10.1111/1523-1747.ep12530811] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The physico-chemical properties and the stability of anthralin, a potent antipsoriatic agent, has been investigated in model systems by optical absorption and fluorescence spectroscopy and by gas chromatography coupled to mass spectrometry. Systematic studies were carried out on anthralin and its oxidation products (1,8-dihydroxyanthraquinone and 1,8-1',8'-tetrahydroxydianthron). Anthralin and 1,8-dihydroxyanthraquinone are shown to readily bind to human serum albumin and not to DNA. Anthralin bound to albumin readily oxidizes, yielding the 1,8-dihydroxyanthraquinone which is fairly stable. These results are correlated with those obtained with intact whole human epidermis and suction blister fluid showing that, in the former case, anthralin binds to protein as suggested by absorption and fluorescence spectroscopies. Gas chromatography-mass spectrometry analysis makes it easy to detect anthralin and 1,8-dihydroxyanthraquinone in suction blister fluid doped with anthralin but not in suction blister obtained after topical application on normal human skin.
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Morlière P, Avice O, Melo TS, Dubertret L, Giraud M, Santus R. A study of the photochemical properties of some cinnamate sunscreens by steady state and laser flash photolysis. Photochem Photobiol 1982; 36:395-9. [PMID: 7146110 DOI: 10.1111/j.1751-1097.1982.tb04392.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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