10 research outputs found

    Characterization of a nonvirulent variant of lymphocytic choriomeningitis virus

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    A cold-adapted, nonvirulent variant of the Armstrong strain of lymphocytic choriomeningitis virus was isolated from infected L929 cells maintained at 25° C. This variant, designated P17, was capable of replicating in the central nervous system of mice without causing disease and conferring immunity to back challenge with the parental strain.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/41689/1/705_2005_Article_BF01320786.pd

    Radiopharmaceuticals drug interactions: a critical review

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    Radiopharmaceuticals play a critical role in modern medicine primarily for diagnostic purposes, but also for monitoring disease progression and response to treatment. As the use of image has been increased, so has the use of prescription medications. These trends increase the risk of interactions between medications and radiopharmaceuticals. These interactions which have an impact on image by competing with the radiopharmaceutical for binding sites for example can lead to false negative results. Drugs that accelerate the metabolism of the radiopharmaceutical can have a positive impact (i.e. speeding its clearance) or, if repeating image is needed, a negative impact. In some cases, for example in cardiac image among patients taking doxirubacin, these interactions may have a therapeutic benefit. The incidence of drug-radiopharmaceuticals adverse reactions is unknown, since they may not be reported or even recognized. Here,we compiled the medical literature, using the criteria of a systematic review established by the Cochrane Collaboration, on pharmaceutical-drug interactions to provide a summary of documented interactions by organ system and radiopharmaceuticals. The purpose is to provide a reference on drug interactions that could inform the nuclear medicine staff in their daily routine. Efforts to increase adverse event reporting, and ideally consolidate reports worldwide, can provide a critically needed resource for prevention of drug-radiopharmaceuticals interactions.<br>Os radiofĂĄrmacos desempenham função crĂ­tica na medicina moderna, primariamente para fins diagnĂłsticos, mas tambĂ©m no monitoramento da progressĂŁo de doenças assim como na avaliação de respostas ao tratamento. O uso da tecnologia por imagem tem crescido e conseqĂŒentemente as prescriçÔes de medicamentos (radiofĂĄrmacos em especial) com esse propĂłsito. Este fato, aumenta o risco de interaçÔes entre medicamentos e radiofĂĄrmacos. InteraçÔes que podem ter um impacto na imagem, podem resultar em falso negativo e assim ter sĂ©rias conseqĂŒĂȘncias para o paciente. JĂĄ drogas que aceleram o metabolismo podem ter resultado positivo pois podem aumentar a taxa de eliminação do radiofĂĄrmaco (clearance acelerado). Contudo, podem ainda ter resultados negativos, se a interação resultar em necessidade de repetição do exame. Em alguns casos, por exemplo em imagem cardĂ­aca, entre pacientes sob o uso de doxarubicina, essas interaçÔes podem ter efeito terapĂȘutico. A incidĂȘncia de efeitos adversos envolvendo radiofĂĄrmacos Ă© desconhecida, alĂ©m de nĂŁo ser oficialmente reconhecida, nem notificada, principalmente no Brasil. Nesse estudo foram compilados da literatura mĂ©dica, usando a metodologia da revisĂŁo sistemĂĄtica, estabelecida pela Cochrane Collaboration, estudos e relatos de interaçÔes medicamentosas com radiofĂĄrmacos. O objetivo Ă© prover uma referĂȘncia (sumĂĄrio) de interaçÔes medicametosas com radiofĂĄrmacos que possa auxiliar a medicina nuclear na sua rotina diĂĄria. Contudo, esforços devem ser feitos na tentativa de instituir a notificação de efeitos adversos com radiofĂĄrmacos, e assim prevenir esse tipo de interação

    Strahlenbedingte KnochenschÀden

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