Words similar to vomeronasal
Example sentences for: vomeronasal
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Females lack an estrous cycle and anestrous adults are dependent upon direct contact with a non-volatile male pheromone for induction of estrus [ 8 ] . Hormonal control of scentmarking and sexual behavior of this species (hereinafter, opossum) has been described in some detail [ 9 10 ] . Estrus is induced when females nuzzle scentmarks from the androgen-dependent suprasternal (chest) gland [ 10 11 ] . Nuzzling delivers nonvolatile chemical signals to the vomeronasal organ (VNO) [ 12 ] and surgical removal of the VNO prevents induction of estrus by scentmarks alone [ 13 ] , although cautery ablation of the VNO fails to prevent ovarian activation and ovulation in females that are caged with adult males [ 14 ] . While anestrous adults are reliant on male pheromone for reproductive activation, spontaneous postlactational estrus occurs in the absence of direct contact with male pheromone [ 15 ] .
Importantly, PN-1 immunoreactivity was not limited to MAP1b immunoreactive axons, but was also present within the basal laminae of the vomeronasal organ (VNO) as well as within the adjacent mesenchyme (Figure 4).
To determine whether PN-1 is expressed by the olfactory system during the time of active GnRH neuronal migration, we examined its expression in the embryonic mouse where its mRNA is known to be expressed [ 39 ] . At E15, PN-1 protein is present within MAP1b immunoreactive axons of the vomeronasal nerve (the migratory path used by GnRH neurons in mammals).
PN-1 immunoreactivity was also present within the basal laminae of the vomeronasal organ, a barrier crossed by GnRH neurons when they initiate their migration.
In the mouse, trypsin immunoreactivity is present within S 100 immunoreactive glia which ensheath axons of the vomeronasal nerve.
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