AVPV

AcronymDefinition
AVPVanterior ventral periventricular area
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References in periodicals archive ?
Alem disso, os mesmos autores demonstraram que, em ratas com restricao na dieta, mesmo apos o pico da lactacao, ha uma diminuicao na capacidade do estradiol em induzir imunoreatividade de c-Fos no AVPV. Ja aquelas alimentadas ad libitum, a imunoreatividade de c-Fos apos o pico da lactacao foi similar aos animais nao lactantes (ABIZAID et al., 2004).
Em roedores, existem duas regioes que expressam o gene Kiss-1: a dos nucleos arqueados (ARQ) e a AVPV. E interessante ressaltar que, nessas especies, os esteroides diminuem a expressao de Kiss-1 no grupo de neuronios ARQ, sendo observado um efeito oposto na regiao AVPV (SMITH et al., 2005).
En el ovino, el nucleo antero-ventral-peri-ventricular (AVPV) del APO del hipotalamo asi como los nucleos arqueado y ventro-medial (NA-NVM), poseen un gran numero de receptores estrogenicos y androgenicos [7, 19] lo cual podria explicar la participacion de las hormonas sexuales esteroideas sobre la expresion del receptor NMDA en el hipotalamo del ovino.
We performed our studies on the anteroventral periventricular nucleus (AVPV), a sexually dimorphic region of the brain that is critically involved in female reproductive physiology (Simerly 1989; Wiegand et al.
Numbers of ER-[beta]-immunoreactive cells were quantified in the AVPV and SON.
In each section, the boundary of the AVPV or SON was contoured at low magnification (10x) with the help of a rat brain atlas (Swanson 1998), and the area was outlined on a live computer image.
Stereologic analysis of effects of PCBs on ER-[beta] in the AVPV. Photomicrographs showing expression of ER-[beta] in the AVPV in a representative control and Aroclor 1221-treated rat are shown in Figure 2A and B.
In comparing results of the SON with those in the AVPV, although the volumes of the SON and AVPV were comparable (Figure 4, A vs.
Aroclor 1221 caused a substantial down-regulation of numbers of ER-[beta]-positive cells in the AVPV, a key brain area controlling reproductive function (Simerly 1998; Wiegand et al.
Effects of Aroclor 1221 on the AVPV. The AVPV of female rats is essential for the regulation of hypothalamic gonadotropin-releasing hormone neurons and the control of the estrogen-induced surge of gonadotropin-releasing hormone and luteinizing hormone (Gu and Simerly 1997.; Le et al.
In the present study, we found that perinatal Aroclor 1221 treatment to female rats resulted in a significant decrease in ER-[beta] cell number in the AVPV. Our results are consistent with a masculinizing effect of Aroclor 1221 on this cell phenotype, similar to effects of exogenous estrogen, which also decreased ER-[beta] cell number in the AVPV of neonatal female rats (Orikasa et al.