Allopregnanolone enhancement of GABAergic transmission in rat medial preoptic area neurons

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Allopregnanolone enhancement of GABAergic transmission in rat medial preoptic area neurons.

Gamma-aminobutyric acid (GABA)-mediated transmission in the medial preoptic area (MPOA) of the hypothalamus plays an important role in functions such as sex steroid hormone dynamics and control of body temperature. The action of allopregnanolone, the primary metabolite of progesterone, on GABAergic transmission was investigated by employing patch clamp whole cell recording on acutely dissociate...

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alpha 2-Adrenoceptor-mediated presynaptic modulation of GABAergic transmission in mechanically dissociated rat ventrolateral preoptic neurons.

The ventrolateral preoptic nucleus (VLPO) is a key nucleus involved in the homeostatic regulation of sleep-wakefulness. Little is known, however, about the cellular mechanisms underlying its role in sleep regulation and how the neurotransmitters, such as GABA and noradrenaline (NA), are involved. In the present study we investigated GABAergic transmission to acutely dissociated VLPO neurons usi...

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Galanin neurons in the medial preoptic area govern parental behaviour

Mice display robust, stereotyped behaviours towards pups: virgin males typically attack pups, whereas virgin females and sexually experiencedmales and females display parental care. Here we show that virginmales genetically impaired in vomeronasal sensing do not attack pups and are parental. Furthermore, we uncover a subset of galanin-expressing neurons in the medial preoptic area (MPOA) that a...

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Alterations of medial preoptic area neurons following pregnancy and pregnancy-like steroidal treatment in the rat.

There is a marked increase in the maternal behavior displayed by a female rat following pregnancy-due primarily to exposure to the gonadal hormones progesterone and estradiol (P and E(2), respectively). We examined Golgi-Cox silver-stained, Vibratome-sectioned neurons visualized and traced using computerized microscopy and image analysis. In Part One, we examined the hormonal-neural concomitant...

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GABAergic neurons in the preoptic area send direct inhibitory projections to orexin neurons

Populations of neurons in the hypothalamic preoptic area (POA) fire rapidly during sleep, exhibiting sleep/waking state-dependent firing patterns that are the reciprocal of those observed in the arousal system. The majority of these preoptic "sleep-active" neurons contain the inhibitory neurotransmitter GABA. On the other hand, a population of neurons in the lateral hypothalamic area (LHA) cont...

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ژورنال

عنوان ژورنال: American Journal of Physiology-Endocrinology and Metabolism

سال: 2002

ISSN: 0193-1849,1522-1555

DOI: 10.1152/ajpendo.00049.2002