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The results showed significant schistosomicidal in vivo activity at 300 mg/kg. In addition, livers from S. mansoni infected mice showed a greater number of egg granulomas and the changes in the pharmacokinetic parameters in this group could be associated with the pathology of the murine experimental schistosomiasis.

We verified if cocaine-induced peripheral activation might disrupt [ 18 F]FDG brain uptake after a cocaine challenge and suggested an optimal protocol to measure cocaine-induced brain metabolic alterations in mice. C57Bl/6 male mice were injected with [ 18 F]FDG and randomly separated into three groups. Groups 1 and 2 were kept conscious after [ 18 F]FDG administration and after 5 min received saline or cocaine (20 mg/kg). The animals in group 1 (n = 5) were then evaluated in the open field for 30 min and those from group 2 (n = 6) were kept alone in a home cage for the same period. Forty-five minutes after [ 18 F]FDG administration, images were acquired for 30 min. Group 3 (n = 6) was kept anesthetized and image acquisition started immediately after tracer injection, for 75 min. Saline (Day 1) or cocaine (Day 2) was injected 5 min after starting acquisition. Another set of animals (n = 5) were treated with cocaine every other day for 10 days or saline (n = 6) and were scanned with the dynamic protocol to verify its efficacy. [ 18 F]FDG uptake increased after cocaine administration when compared to baseline only in animals kept under anesthesia. No brain effect of cocaine was observed in animals submitted to the open field or kept in the home cage.The use of anesthesia is essential to visualize cocaine-induced changes in brain metabolism by [ 18 F]FDG PET, providing an interesting preclinical approach to investigate naïve subjects and enabling a bidirectional translational science approach for better understanding of cocaine use disorder.

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14 dias. Em relação às moléculas colinérgicas, observou-se, após o tratamento crônico, aumento da quantidade de ChAT em todas as estruturas estudadas. Além disso, VAChT mostrou-se aumentado no hipocampo após ambos os tratamentos. As dosagens plasmáticas revelaram a presença de 20,38 ± 3,4 ng/mL de cocaína e 224,6 ± 24,02 ng/mL de benzoilcgonina (BZE) nos animais do grupo agudo e, nos do grupo crônico, 62,26 ± 10,56 ng/mL e 375,1 ± 25,62 ng/mL de cocaína e BZE respectivamente. Palavras-chave: Farmacodependência. Compulsão. Cocaína. Acetilcolina. Sistema colinérgico muscarínico. ABSTRACT SPELTA, Lidia Emmanuela Wiazowski. Cocaine compulsive behavior and its consequences in the cholinergic muscarinic system. 2017. 116 f. Dissertação (Mestrado em Ciências) -Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, 2017.Drug addiction is a chronic releapsing disorder characterized by the loss of control in limiting drug intake. As the drug use persists, anatomical, physiological and neurochemical changes