Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Añadir filtros








Tipo de estudio
Intervalo de año
1.
Braz. j. biol ; 78(3): 548-555, Aug. 2018. tab, graf
Artículo en Inglés | LILACS | ID: biblio-951567

RESUMEN

Abstract Imposex is the development of male sexual characteristics caused by the toxic effects of some chemicals that acts as an endocrinal disruptor. Antifouling paints contain these chemicals. Cartagena lacks studies to indicate the extent of imposex in its coastal waters. The aim of this study was to determine the prevalence of imposex in the gastropod Stramonita haemastoma in Cartagena, Colombia. Specimens were collected during 2013 from locations of high and low influence of port activity. Morphometric measurements and the frequency of the occurrence of imposex were registered. The comparison among morphometric variables showed statistically significant differences between the two sites studied. Furthermore, the females of the S. haemastoma species presented an imposex frequency of 93.1% in Birds' Island, Cartagena Bay, compared to 31.8% in La Bocana. The relative penis size index or RPLI (10.145 and 3.231) and vas deferens sequence index or VDSI (2.83 and 1.16), showed possible contamination by organotin compounds in both places.


Resumo Imposex é o desenvolvimento de características sexuais masculinas causadas por poluentes tóxicos de alguns produtos químicos que atuam como desreguladores endócrinos. Tintas anti-incrustantes são as que contêm estes produtos químicos. Cartagena carece de estudos para indicar a extensão do imposex nas suas águas costeiras. O objetivo deste estudo foi determinar a prevalência de imposex no gastrópode Stramonita haemastoma em Cartagena, Colômbia. Os espécimes foram coletados durante 2013 de locais de alta e baixa influência da atividade portuária. Foram registradas as medidas morfométricas e a frequência da ocorrência do imposex. A comparação entre as variáveis morfométricas mostrou diferenças estatisticamente significantes entre os dois locais estudados. Além disso, as fêmeas da espécie S. haemastomaapresentaram uma frequência de imposex de 93,1% na Ilha das Aves, Baía das Cartagena, em comparação com 31,8% em La Bocana. O índice do comprimento relativo do pênis ou RPLI (10,145 e 3,231) e o índice da sequência do vaso deferente ou VDSI (2,83 e 1,16), mostraram possível contaminação por compostos organoestânicos em ambos os locais.


Asunto(s)
Animales , Masculino , Femenino , Compuestos Orgánicos de Estaño/toxicidad , Pintura/toxicidad , Trastornos del Desarrollo Sexual/inducido químicamente , Contaminantes Químicos del Agua/toxicidad , Monitoreo del Ambiente/métodos , Gastrópodos/efectos de los fármacos , Conducto Deferente/efectos de los fármacos , Contaminantes Químicos del Agua/análisis , Colombia
2.
Braz. j. med. biol. res ; 44(9): 958-965, Sept. 2011. ilus
Artículo en Inglés | LILACS | ID: lil-599669

RESUMEN

Organotin compounds are typical environmental contaminants and suspected endocrine-disrupting substances, which cause irreversible sexual abnormality in female mollusks, called "imposex". However, little is known about the capability of triorganotin compounds, such as tributyltin and triphenyltin, to cause disorders in the sexual development and reproductive functions of mammals, including humans and rodents. Moreover, these compounds can act as potential competitive inhibitors of aromatase enzyme and other steroidogenic enzymes, affecting the reproductive capacity of male and female mammals. In this review, we discuss the cellular, biochemical, and molecular mechanisms by which triorganotin compounds induce adverse effects in the mammalian reproductive function.


Asunto(s)
Animales , Femenino , Humanos , Masculino , Genitales/efectos de los fármacos , Mamíferos/fisiología , Compuestos Orgánicos de Estaño/toxicidad , Compuestos de Trialquiltina/toxicidad , Aromatasa/efectos de los fármacos , Sistema Endocrino/efectos de los fármacos , Reproducción/efectos de los fármacos
3.
Bahrain Medical Bulletin. 1983; 5 (1): 27-31
en Inglés | IMEMR | ID: emr-2765

RESUMEN

THE antifouling paint coatings industry has been developing new organotin based formulations which are designed to protect ships for long periods. Studies of the acute toxicity of Bis [Tri-N-Butyltin] oxide, tributytin fluoride and triphenyltin fluoride are reviewed together with a 90 day subacute dermal study and an animal study of the carcingenicity of tributytin fluoride. Presentation of the safe application of organtin antifouling compounds in Shipyards is included in this report. Organotin antifouling paints have been used safely in shipyards in the past and they are known to irritate the skin, the eye and even the upper respiratory tract. Tin oxide, a naturally occurring mineral is the result of organotins dealkylation. Tin oxide is very much present in our environment and has no history of adverse effects on marine organisms


Asunto(s)
Compuestos Orgánicos de Estaño/toxicidad , Toxicología , Prevención de Accidentes
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA