Dopamine infusion into the third ventricle increases gene expression of hypothalamic vasoactive intestinal peptide and pituitary prolactin and luteinizing hormone β subunit in the turkey

2003 ◽  
Vol 130 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Renu Bhatt ◽  
Orlan Youngren ◽  
Seong Kang ◽  
Mohamed El Halawani
Keyword(s):  
Gene Expression ◽  
Luteinizing Hormone ◽  
Vasoactive Intestinal Peptide ◽  
Third Ventricle ◽  
Β Subunit ◽  
Dopamine Infusion ◽  
The Third ◽  
Pituitary Prolactin

scholarly journals Improved visualization of luteinizing hormone releasing hormone pathways by immunocytochemical staining of thick vibratome sections.

1980 ◽  
Vol 28 (4) ◽  
pp. 361-363 ◽  
Author(s):  
B J Burchanowski ◽  
L A Sternberger
Keyword(s):  
Luteinizing Hormone ◽  
Median Eminence ◽  
Anterior Commissure ◽  
Third Ventricle ◽  
Immunocytochemical Staining ◽  
Luteinizing Hormone Releasing Hormone ◽  
Bed Nucleus ◽  
Releasing Hormone ◽  
The Third ◽  
Diagonal Band

Using 100-micron thick Vibratome sections and a modification of the peroxidase--antiperoxidase method of immunocytochemical staining we achieve a Golgi-like image of luteinizing hormone releasing hormone (LHRH) cells and fibers in mouse brain. Five LHRH pathways are described: 1) A dense projection of fibers from LHRH cells in the medial preoptic and septal areas to the wall of the third ventricle; 2) a projection of fibers from neurons in the bed nucleus of the stria terminalis and the nucleus of the anterior commissure to the subfornical organ; 3) projections of fibers from neurons in the medial septal nucleus and the diagonal band of Broca to the olfactory bulb; 4) fibers which travel within or just lateral to the wall of the third ventricle from the organum vasculosum laminae terminalis to the median eminence; 5) cells and fibers located just dorsal to the optic tracts which project rostrally to the preoptic area and caudally to the level of the median eminence where they course medially to converge and enter the median eminence.

REVERSAL BY ARGININE-VASOTOCIN OF THE EFFECTS OF PINEALECTOMY ON THE AMOUNT OF 5-HYDROXYTRYPTAMINE IN THE HYPOTHALAMUS AND THE CONCENTRATIONS OF LUTEINIZING HORMONE AND FOLLICLE-STIMULATING HORMONE IN THE PLASMA OF IMMATURE MALE RATS

1980 ◽  
Vol 84 (1) ◽  
pp. 159-161 ◽  
Author(s):  
S. PAVEL ◽  
NOEMI LUCA ◽  
MARIA CALB ◽  
R. GOLDSTEIN
Keyword(s):  
Luteinizing Hormone ◽  
Wistar Rats ◽  
Third Ventricle ◽  
Follicle Stimulating Hormone ◽  
Arginine Vasotocin ◽  
Male Rats ◽  
The Third ◽  
Immature Male ◽  
Receptor Sites ◽  
Male Wistar Rats

Pinealectomy in immature (25-day-old) male Wistar rats significantly decreased the content of 5-hydroxytryptamine (5-HT) in the hypothalamus and increased concentrations of plasma LH and FSH 3 days after surgery. Extremely small amounts (10−4 pg) of arginine-vasotocin (AVT) injected into the third ventricle (pineal recess) 5 min after pinealectomy completely prevented the decrease in the hypothalamic content of 5-HT and the increase in the concentration of LH and FSH in the plasma. It is suggested that AVT prevented the increase of plasma levels of LH and FSH after pinealectomy by increasing levels of 5-HT at postsynaptic receptor sites.

scholarly journals Activin Regulates Luteinizing Hormone β-Subunit Gene Expression through Smad-Binding and Homeobox Elements

2005 ◽  
Vol 19 (10) ◽  
pp. 2610-2623 ◽  
Author(s):  
Djurdjica Coss ◽  
Varykina G. Thackray ◽  
Chu-Xia Deng ◽  
Pamela L. Mellon
Keyword(s):  
Gene Expression ◽  
Luteinizing Hormone ◽  
Β Subunit ◽  
Subunit Gene

scholarly journals Luteinizing Hormone-Releasing Hormone Distribution in the Anterior Hypothalamus of the Female Rats

ISRN Anatomy ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Leandro Castañeyra-Ruiz ◽  
Ibrahim González-Marrero ◽  
Agustín Castañeyra-Ruiz ◽  
Juan M. González-Toledo ◽  
María Castañeyra-Ruiz ◽  
...  
Keyword(s):  
Luteinizing Hormone ◽  
Preoptic Area ◽  
Third Ventricle ◽  
Anterior Hypothalamus ◽  
Lamina Terminalis ◽  
Luteinizing Hormone Releasing Hormone ◽  
Releasing Hormone ◽  
Immunoreactive Material ◽  
The Third ◽  
Organum Vasculosum

Luteinizing hormone-releasing hormone (LHRH) neurons and fibers are located in the anteroventral hypothalamus, specifically in the preoptic medial area and the organum vasculosum of the lamina terminalis. Most luteinizing hormone-releasing hormone neurons project to the median eminence where they are secreted in the pituitary portal system in order to control the release of gonadotropin. The aim of this study is to provide, using immunohistochemistry and female brain rats, a new description of the luteinizing hormone-releasing hormone fibers and neuron localization in the anterior hypothalamus. The greatest amount of the LHRH immunoreactive material was found in the organum vasculosum of the lamina terminalis that is located around the anterior region of the third ventricle. The intensity of the reaction of LHRH immunoreactive material decreases from cephalic to caudal localization; therefore, the greatest immunoreaction is in the organum vasculosum of the lamina terminalis, followed by the dorsomedial preoptic area, the ventromedial preoptic area, and finally the ventrolateral medial preoptic area, and in fibers surrounding the suprachiasmatic nucleus and subependymal layer on the floor of the third ventricle where the least amount immunoreactive material is found.

FAILURE OF HISTAMINE TO INDUCE THE RELEASE OF LUTEINIZING HORMONE IN CASTRATED RATS PRIMED WITH SEX STEROIDS

1978 ◽  
Vol 78 (3) ◽  
pp. 447-448 ◽  
Author(s):  
A. O. DONOSO ◽  
A. M. BANZAN
Keyword(s):  
Luteinizing Hormone ◽  
Positive Feedback ◽  
Sex Steroids ◽  
Third Ventricle ◽  
Male Rats ◽  
Intraventricular Injection ◽  
Mediobasal Hypothalamus ◽  
Feedback Effects ◽  
The Third

Instituto de Investigaciones Cerebrales, Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina (Received 10 March 1978) Injection of histamine into the third ventricle causes the release of luteinizing hormone (LH) in ovariectomized, steroid-primed and pro-oestrous rats (Donoso, Banzan & Borzino, 1976; Donoso, 1978). In oestrous rabbits, intraventricular injection of large doses of histamine or injection of histamine into the mediobasal hypothalamus induces ovulation and secretion of progesterone by the ovaries (Sawyer, 1955; Endröczi & Hilliard, 1965). However, histamine has no effect on the concentration of LH in the plasma of male rats (Donoso & Banzan, 1976). Together, these results suggest that histamine is able to induce the release of LH both before ovulation and in the presence of an adequate hormonal background. The positive feedback effects of oestradiol and progesterone on the release of gonadotrophins are absent in male rats. Injection of oestradiol, progesterone or testosterone into steroid-primed

Sign in / Sign up

Export Citation Format

Share Document