1999
DOI: 10.1002/(sici)1099-1573(199912)13:8<689::aid-ptr532>3.0.co;2-l
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Antioestrogenic effect of trans-dehydrocrotonin, a nor-clerodane diterpene from Croton cajucara Benth. in rats

Abstract: This study examined trans‐dehydrocrotonin (t‐DCTN), a nor‐clerodane diterpene isolated from the Brazilian medicinal plant Croton cajucara Benth., for a possible antioestrogenic activity using immature rats as a model system for bioassay of oestrogen, and for an antiimplantation effect in regularly cycling rats of proven fertility. In the antioestrogen test, t‐DCTN (25 and 50 mg/kg) effectively prevented oestrogen‐induced increases of uterine wet weights. In addition, the vaginal openings provoked by oestrogen … Show more

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Cited by 30 publications

(8 citation statements)
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“…foi administrada 60 min antes da indução de lesão por carragenina (1% em solução salina; 250 μL/animal). A inibição da migração de leucócitos para o líquido pleural pela DCTN foi de 33%, enquanto a dexametasona (fármaco padrão) apresentou Uma revisão das atividades biológicas da trans-desidrocrotonina, um produto natural obtido de Croton cajucara inibição de 44% (Maciel et al, 2002a Costa et al, 1999).…”
Section: Atividades Antinfl Amatória E Antinociceptiva
unclassified
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…foi administrada 60 min antes da indução de lesão por carragenina (1% em solução salina; 250 μL/animal). A inibição da migração de leucócitos para o líquido pleural pela DCTN foi de 33%, enquanto a dexametasona (fármaco padrão) apresentou Uma revisão das atividades biológicas da trans-desidrocrotonina, um produto natural obtido de Croton cajucara inibição de 44% (Maciel et al, 2002a Costa et al, 1999).…”
Section: Atividades Antinfl Amatória E Antinociceptiva
unclassified
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…O primeiro estudo fitoquímico do Croton cajucara levou ao isolamento do diterpeno 19-nor-clerodano transdesidrocrotonina (DCTN, Figura 1); na seqüência, outros clerodanos inéditos foram isolados (MACIEL, 1997;MACIEL et al, 2003MACIEL et al, , 2006aMACIEL et al, , 2006b. Pesquisas farmacológicas realizadas com o Croton cajucara comprovaram que a DCTN é um agente medicinal eficaz para vários tipos de doenças, dentre elas, destaca-se a ação antiestrogênica (LUNA-COSTA et al, 1999), antitumoral (GRYNBERG et al, 1999, antimutagênica (AGNER et al, 1999;2001) e cardiovascular (SILVA et al, 2005).…”
Section: Moléculas Sinalizadoras Moléculas Sinalizadoras Moléculas Si...
unclassified
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…A Tabela 1 mostra exemplos de espécies do gênero Croton que se encontram distribuídas no Brasil (WEBSTER, 1994;MACIEL, 1997). VAN DEN BERG, 1982;DI STASI, 1989;SOARES, 2004 FARIAS et al, 1996;1997;SOUZA-BRITO et al 1998;HIRUMA-LIMA et al, 1999a;1999b;LUNA COSTA et al, 1999;GRYNBERG et al;BIGHETTI et al, 1999;AGNER et al, 1999;RODRÍGUEZ et al, 1999;SILVA et al, 2001a;2001b;2001c;CAMPOS et al, 2002;MACIEL et al, 2003b;GRASSI-KASSISSE et al, 2003;MELO et al, 2001;ALMEIDA et al, 2003;ANAZETTI et al, 2003;ROSA et al, 2003;FREIRE et al, 2003a;CORRÊA et al, 2005;ALVIANO et al, 2005;PAULA et al, 2006;SANTOS et al, 2006;TIEPPO et al, 2006. Fitoquímica (11): Fitoquímica (11): Fitoquímica (11): Fitoquímica (11): Fitoquímica (11): SIMÕES et al, 1979;ITOKAWA et al, 1989;ICHIHARA et al, 1992;KUBO et al, 1991;MACIEL et al, 1998aMACIEL et al, , 1998bMACIEL et al, , 2003aLEMOS et al, 1999;LOPES et al, 2000;BARRETO JR. et al, 2005.Química MACIEL et al, 2000;…”
Section: Distribuição Do Gênero Distribuição Do Gênero Distribuição D...
unclassified
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.