scholarly journals The Changing Profiles of L-Ornithine Decarboxylase and S-Adenosyl-L-Methionine Decarboxylase Activities in Testicular Cell Types During Sexual Maturation of Male Rats

1989 ◽  
Vol 10 (2) ◽  
pp. 152-158 ◽  
Author(s):  
SANKARARAMAN SHUBHADA ◽  
REKHA DAVER ◽  
YU-HUI TSAI
Keyword(s):  
Ornithine Decarboxylase ◽  
Sexual Maturation ◽  
Cell Types ◽  
Male Rats ◽  
Testicular Cell

Electrophysiological evidence that systemic angiotensin influences rat area postrema neurons

1990 ◽  
Vol 258 (1) ◽  
pp. R70-R76 ◽  
Author(s):  
S. Papas ◽  
P. Smith ◽  
A. V. Ferguson
Keyword(s):  
Nucleus Tractus Solitarius ◽  
Area Postrema ◽  
Cell Types ◽  
Male Rats ◽  
Ang Ii ◽  
Adrenergic Agonist ◽  
Arterial Blood ◽  
Spontaneous Activities ◽  
Single Unit Recordings ◽  
Body Fluid Balance

Extracellular single-unit recordings from neurons in the area postrema (AP) and the nucleus tractus solitarius (NTS) in anesthetized male rats demonstrated that most cells in these regions have spontaneous activities of 5 Hz or less. Systemic angiotensin (ANG II) (50-500 ng) enhanced the activity of 55% of AP cells tested (n = 76), whereas 53% of tested NTS neurons (n = 62) were inhibited by ANG II. To determine whether these neurons were influenced specifically by circulating ANG II or by the accompanying increase in mean arterial blood pressure (BP), the effects of adrenergic agonists given intravenously on ANG II influenced neurons were also examined. Subsequently two cell types were characterized: cells responding to iv ANG II but not to the adrenergic agonist ("ANG II sensitive") and cells responding in a similar way to both agents ("BP sensitive"). Most ANG II-responsive neurons in the AP (53.5%) and the NTS (65%) were determined to be BP sensitive. These data demonstrate that ANG II influences the activity of AP neurons. In addition, there exists a second population of AP neurons apparently responsive to perturbations of the cardiovascular system. These studies further emphasize the potential roles of the AP in the regulation of body fluid balance.

Evaluation of Stallion Testicular Cell Types by Flow Cytometry

2021 ◽  
pp. 103778
Author(s):  
Rosanna Serafini ◽  
Dickson D. Varner ◽  
Charles C. Love
Keyword(s):  
Flow Cytometry ◽  
Cell Types ◽  
Testicular Cell

scholarly journals Advancement of Sexual Maturation in Male Rats by Pituitary Transplants

1979 ◽  
Vol 21 (5) ◽  
pp. 1263-1271 ◽  
Author(s):  
Ronald A. P. de Jong ◽  
Pieter van der Schoot
Keyword(s):  
Sexual Maturation ◽  
Male Rats

The Pituitary Gland of the Sockeye (Oncorhynchus nerka) During Sexual Maturation and Spawning

1967 ◽  
Vol 24 (8) ◽  
pp. 1791-1810 ◽  
Author(s):  
A. P. van Overbeeke ◽  
J. R. McBride
Keyword(s):  
Pituitary Gland ◽  
Sexual Maturation ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Gonad Development ◽  
Cell Types ◽  
Limited Extent ◽  
Degenerative Alterations ◽  
Different Cell Types

This communication presents the results of a study of the pituitaries of 150 sockeye salmon in various stages of sexual maturation from the time they entered freshwater till after completion of spawning. In the homologue of the adenohypophysis, nine different cell types were distinguished. On the basis of changes in tinctorial and histochemical properties and relative proportions of each of these cells, it was concluded that the sockeye pituitary contains six different hormone-producing cell types. One of these probably possesses a gonadotrophic function. Degenerative phenomena in the pituitary were found in the sexually ripe and the spent salmon, but only to a limited extent. The implications of the changes in the occurrence of the six different cell types and the degenerative alterations are discussed in relation to gonad development and the death after spawning.

scholarly journals Prenatal undernutrition disrupted the sexual maturation, but not the sexual behavior, in male rats

2017 ◽  
Vol 16 (4) ◽  
pp. 325-329 ◽  
Author(s):  
Toshiya Matsuzaki ◽  
Munkhsaikhan Munkhzaya ◽  
Altankhuu Tungalagsuvd ◽  
Yiliyasi Mayila ◽  
Takeshi Iwasa ◽  
...  
Keyword(s):  
Sexual Behavior ◽  
Sexual Maturation ◽  
Male Rats ◽  
Prenatal Undernutrition

Rat liver endothelial cell glutamine transporter and glutaminase expression contrast with parenchymal cells

1999 ◽  
Vol 276 (3) ◽  
pp. G743-G750 ◽  
Author(s):  
Rüdiger Lohmann ◽  
Wiley W. Souba ◽  
Barrie P. Bode
Keyword(s):  
Endothelial Cells ◽  
Amino Acid ◽  
Cell Types ◽  
Male Rats ◽  
Specific Cell ◽  
Liver Endothelial Cell ◽  
Glutamine Transporter ◽  
Health And Disease ◽  
Parenchymal Cells ◽  
Functional Analyses

Despite the central role of the liver in glutamine homeostasis in health and disease, little is known about the mechanism by which this amino acid is transported into sinusoidal endothelial cells, the second most abundant hepatic cell type. To address this issue, the transport ofl-glutamine was functionally characterized in hepatic endothelial cells isolated from male rats. On the basis of functional analyses, including kinetics, cation substitution, and amino acid inhibition, it was determined that a Na+-dependent carrier distinct from system N in parenchymal cells, with properties of system ASC or B0, mediated the majority of glutamine transport in hepatic endothelial cells. These results were supported by Northern blot analyses that showed expression of the ATB0 transporter gene in endothelial but not parenchymal cells. Concurrently, it was determined that, whereas both cell types express glutamine synthetase, hepatic endothelial cells express the kidney-type glutaminase isozyme in contrast to the liver-type isozyme in parenchymal cells. This represents the first report of ATB0 and kidney-type glutaminase isozyme expression in the liver, observations that have implications for roles of specific cell types in hepatic glutamine homeostasis in health and disease.

scholarly journals Effect of α-difluormethylornithine on Anastrepha fraterculus (Diptera, Tephritidae) ovary size

2009 ◽  
Vol 69 (1) ◽  
pp. 149-152
Author(s):  
VV. Cardoso ◽  
JCF. Moreira ◽  
AK. Oliveira
Keyword(s):  
Ornithine Decarboxylase ◽  
Sexual Maturation ◽  
Effective Concentration ◽  
Young Females ◽  
Anastrepha Fraterculus

Ovarian sizes (length and width) were measured in young females of Anastrepha fraterculus (Wiedemann) (Diptera, Tephritidae) subjected or not to the inhibitor α -difluormethylornithine (α -DFMO). The most effective concentration of α -DMFO used was 50 mM and the ovarian measurements (length and width) of the treated females were smaller than those of females not treated with α -DMFO. These data may suggest some relationship between ornithine decarboxylase (ODC) and sexual maturation in A. fraterculus.

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