Zenk
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Pleomorphic adenoma of the parotid gland presenting as extensively ossified lesion with bone infiltration: a case report
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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2. Induction of Zenk protein expression within the nucleus taeniae of the amygdala of pigeons following tone and shock stimulation
In this study, we evaluated the expression of the Zenk protein within the nucleus taeniae of the pigeon’s amygdala (TnA) after training in a classical aversive conditioning, in order to improve our understanding of its functional role in birds. Thirty-two 18-month-old adult male pigeons (Columba livia), weighing on average 350 g, were trained under differe
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-08
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3. Organização temporal em processos de condicionamento classico aversivo e na expressão da proteina Zenk no hipocampo de pombos (C. livia) / Temporal organization of classical aversive conditioning processes and expression of Zenk protein in the hippocampus of pigeons (C. livia)
Part of the knowledge about the mechanisms and neural basis of learning, memory and amnesia is based on the investigation of neural correlates of the behavior of non human animals in aversive situations. Moreover, many studies suggest that these behavioral processes are affected by the circadian timing system. The procedures of classical aversive conditionin
Publicado em: 2009
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4. Retrieval of the aversive memory : participation of NMDA receptor and examination of Zenk expression in the hippocampus of pigeons / Evocação da memoria aversiva : participação do receptor NMDA e analise da ativação de Zenk no hipocampo de pombos
The present study investigated the effects of the antagonist of the glutamate NMDA receptor, MK- 801, in the activation of zenk in the hippocampus of pigeons (Hp) submitted to the classical aversive conditioning. Two groups of pigeons received MK-801 (MKG, n=6) or saline (SG, n=6) 30 min before training with tone-shock associations. The control groups receiv
Publicado em: 2005
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5. Identification and analysis of vocal communication pathways in birds through inducible gene expression
O gene imediato zenk é um gene dependente de atividade que é marcadamente induzido em áreas cerebrais de processamento auditivo ou de controle vocal motor quando pássaros ouvem ou produzem canto, respectivamente. Estudos da expressão de zenk em pássaros canoros e outros grupos de aves será revisto neste artigo, enfocando como esta análise tem gerado
Anais da Academia Brasileira de Ciências. Publicado em: 2004-06
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6. Contact Call-Driven Zenk Protein Induction and Habituation in Telencephalic Auditory Pathways in the Budgerigar (Melopsittacus Undulatus): Implications For Understanding Vocal Learning Processes
Expression of the immediate early gene protein Zenk (zif 268, egr-1, NGF1A, Krox24) was induced in forebrain auditory nuclei in a vocal learning parrot species, the budgerigar (Melopsittacus undulatus), when the subjects either listened to playbacks of an unfamiliar contact call or to a contact call with which they had been familiarized previously. Auditory
Cold Spring Harbor Laboratory Press.
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7. Motor-driven gene expression
There is increased neuronal firing in the high vocal center (a motor nucleus) and other song nuclei of canaries, Serinus canaria, and zebra finches, Taeniopygia guttata, whenever these songbirds sing or hear song. These observations suggested that song perception involved sensory and motor pathways. We now show that the act of singing, but not hearing song,
The National Academy of Sciences of the USA.
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8. Variable rate of singing and variable song duration are associated with high immediate early gene expression in two anterior forebrain song nuclei
The duration of songs and the intervals between these songs are more variable when wild, adult, free-ranging chipping sparrows sing at dawn than when they sing during the day. The more variable delivery is used to interact with males, and the stereotyped delivery is used to attract females. In captive birds, however, the variability observed at dawn persists
National Academy of Sciences.
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9. Song presentation induces gene expression in the songbird forebrain.
We investigated the participation of genomic regulatory events in the response of the songbird brain to a natural auditory stimulus of known physiological and behavioral relevance, birdsong. Using in situ hybridization, we detected a rapid increase in forebrain mRNA levels of an immediate-early gene encoding a transcriptional regulator (ZENK; also known as z
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10. Localized neuronal activation in the zebra finch brain is related to the strength of song learning
Songbirds (Oscines) learn their songs from a tutor. It is not known where in the brain the memories of these learned sounds are stored. Recent evidence suggests that song perception in songbirds involves neuronal activation in brain regions that have not traditionally been implicated in the control of song production or song learning, notably the caudal part
The National Academy of Sciences.
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11. Mammalian Cytochrome P450 Enzymes Catalyze the Phenol-coupling Step in Endogenous Morphine Biosynthesis*
A cytochrome P450 (P450) enzyme in porcine liver that catalyzed the phenol-coupling reaction of the substrate (R)-reticuline to salutaridine was previously purified to homogeneity (Amann, T., Roos, P. H., Huh, H., and Zenk, M. H. (1995) Heterocycles 40, 425–440). This reaction was found to be catalyzed by human P450s 2D6 and 3A4 in the presence of (R)-reti
American Society for Biochemistry and Molecular Biology.
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12. Decrements in auditory responses to a repeated conspecific song are long-lasting and require two periods of protein synthesis in the songbird forebrain.
Earlier work showed that playbacks of conspecific song induce expression of the immediate early gene ZENK in the caudo-medial neostriatum (NCM) of awake male zebra finches and that this response disappears with repeated presentations of the same stimulus. In the present study, we investigated whether repetitions of a song stimulus also elicited a decrement i