THE INFLUENCE OF GONADAL HORMONES ON THE SERUM VITAMIN A OF THE IMMATURE PULLET

1949 ◽  
Vol 27d (2) ◽  
pp. 37-42 ◽  
Author(s):  
D. G. Chapman ◽  
M. Gluck ◽  
R. H. Common ◽  
W. A. Maw
Keyword(s):  
Vitamin A ◽  
Domestic Fowl ◽  
Intramuscular Injection ◽  
Testosterone Propionate ◽  
Serum Vitamin ◽  
Gonadal Hormones ◽  
Gonadal Hormone ◽  
Hormone Activity ◽  
Estradiol Dipropionate

The serum vitamin A level of sexually immature pullets was increased threefold to fourfold by intramuscular injection of 24 mgm. estradiol dipropionate plus 4.5 mgm. testosterone propionate administered in six equal doses over a 12-day period as compared with the level in similar pullets receiving only testosterone propionate. It is suggested that gonadal hormone activity is one of the factors that regulate serum vitamin A levels in the domestic fowl.

STUDIES ON THE GLYCOPROTEINS OF THE DOMESTIC FOWL: II. THE HEXOSAMINE CONTENT OF CERTAIN TISSUES OF THE SEXUALLY IMMATURE PULLET AND SOME EFFECTS THEREON OF GONADAL HORMONES

1955 ◽  
Vol 33 (1) ◽  
pp. 627-637 ◽  
Author(s):  
P. A. Anastassiadis ◽  
W. A. Maw ◽  
R. H. Common
Keyword(s):  
Domestic Fowl ◽  
Dry Matter ◽  
Testosterone Propionate ◽  
Estradiol Benzoate ◽  
Gonadal Hormones ◽  
Relative Increase ◽  
Total Serum ◽  
Free Base ◽  
Concurrent Administration ◽  
Hexosamine Content

The concentration of total hexosamine (as free base) in the dry matter of tissues of the pullet was high in cartilage (8.0 mgm. per gm.) and in oviduct (6.4 mgm. per gm.); medium in comb and wattles, tendon, and lungs (3.0 to 5.5 mgm. per gm.); and low in voluntary muscle (1.5 mgm. per gm.). Dry defatted skin contained 8.3 mgm. per gm. Total serum hexosamine was 52 mgm. per 100 ml. and was increased significantly to about 67 mgm. per 100 ml. by treatment with estradiol benzoate (ODB) and to about 72 mgm. per 100 ml. by ODB plus testosterone propionate (TST). Serum protein was also increased significantly by the hormonal treatments, but to a relatively greater extent. The magnum of the hypertrophied oviducts of pullets treated with ODB was relatively high in dry matter (22.0%), and this dry matter was relatively rich in hexosamine (13.8 mgm. per gm.) and low in hydroxyproline (2.9 mgm. per gm.). The dry matter of the uterus and vagina was relatively low in hexosamine (6.0 mgm. per gm.) and rich in hydroxyproline (5.7 and 10.5 mgm. per gm. for uterus and vagina respectively). Concurrent administration of ODB and TST led to a greater degree of hypertrophy of the oviducts than did administration of ODB alone; both the weight and total hexosamine content of the magnum showed a greater relative increase than did the values for vagina and uterus. Some modifications of the method of determining the hexosamine content of tissues are described.

THE EFFECTS OF GONADAL HORMONES ON THE LEVELS OF PITUITARY LUTEINIZING HORMONE IN THE DOMESTIC FOWL

1968 ◽  
Vol 41 (3) ◽  
pp. 313-318 ◽  
Author(s):  
P. J. HEALD ◽  
K. A. ROOKLEDGE ◽  
B. E. FURNIVAL ◽  
G. D. WATTS
Keyword(s):  
Luteinizing Hormone ◽  
Domestic Fowl ◽  
Testosterone Propionate ◽  
Gonadal Hormones ◽  
Laying Hen ◽  
Ovulatory Cycle ◽  
Specific Point ◽  
Physiological Level ◽  
Oestradiol Benzoate ◽  
Random Intervals

SUMMARY Groups of laying mature domestic fowl were injected i.m. with varying doses of either oestradiol benzoate, testosterone propionate or progesterone and were killed at random intervals throughout the day without reference to any specific point in the ovulatory cycle. Luteinizing hormone (LH) was assayed in the anterior pituitaries of each group. It was shown that oestradiol in doses calculated to be equal to or above the physiological level, increased pituitary LH without necessarily affecting the laying cycle. Testosterone had no significant effect on pituitary LH, while progesterone significantly increased pituitary LH at doses which had no apparent effect upon ovulation. Doses effective in the laying hen had little or no effect on the pituitary content of LH in immature birds. The results in the laying hen are in harmony with the concept previously proposed, by which changes in the levels of circulating plasma oestrogens may regulate the ovulatory pattern of the fowl by inhibiting release of pituitary LH.

THE EFFECT OF GONADAL HORMONES ON LIVER NUCLEIC ACIDS IN THE IMMATURE PULLET

1949 ◽  
Vol 27d (4) ◽  
pp. 200-206 ◽  
Author(s):  
D. G. Chapman ◽  
A. A. Hanson ◽  
R. H. Common ◽  
W. A. Maw
Keyword(s):  
Nucleic Acids ◽  
Ribonucleic Acid ◽  
Testosterone Propionate ◽  
Gonadal Hormones ◽  
Gonadal Hormone ◽  
Desoxyribonucleic Acid

The ribonucleic acid, desoxyribonucleic acid, and the ratio of ribonucleic acid to desoxyribonucleic acid in the liver of immature pullets treated with 4.5 mgm. testosterone propionate over a 12-day period were all increased when this treatment was supplemented by treatment with estrogen. The possible significance of these effects in relation to other effects of similar gonadal hormone treatments is discussed.

STUDIES ON THE GLYCOPROTEINS OF THE DOMESTIC FOWL: II. THE HEXOSAMINE CONTENT OF CERTAIN TISSUES OF THE SEXUALLY IMMATURE PULLET AND SOME EFFECTS THEREON OF GONADAL HORMONES

1955 ◽  
Vol 33 (4) ◽  
pp. 627-637 ◽  
Author(s):  
P. A. Anastassiadis ◽  
W. A. Maw ◽  
R. H. Common
Keyword(s):  
Domestic Fowl ◽  
Dry Matter ◽  
Testosterone Propionate ◽  
Estradiol Benzoate ◽  
Gonadal Hormones ◽  
Relative Increase ◽  
Total Serum ◽  
Free Base ◽  
Concurrent Administration ◽  
Hexosamine Content

The concentration of total hexosamine (as free base) in the dry matter of tissues of the pullet was high in cartilage (8.0 mgm. per gm.) and in oviduct (6.4 mgm. per gm.); medium in comb and wattles, tendon, and lungs (3.0 to 5.5 mgm. per gm.); and low in voluntary muscle (1.5 mgm. per gm.). Dry defatted skin contained 8.3 mgm. per gm. Total serum hexosamine was 52 mgm. per 100 ml. and was increased significantly to about 67 mgm. per 100 ml. by treatment with estradiol benzoate (ODB) and to about 72 mgm. per 100 ml. by ODB plus testosterone propionate (TST). Serum protein was also increased significantly by the hormonal treatments, but to a relatively greater extent. The magnum of the hypertrophied oviducts of pullets treated with ODB was relatively high in dry matter (22.0%), and this dry matter was relatively rich in hexosamine (13.8 mgm. per gm.) and low in hydroxyproline (2.9 mgm. per gm.). The dry matter of the uterus and vagina was relatively low in hexosamine (6.0 mgm. per gm.) and rich in hydroxyproline (5.7 and 10.5 mgm. per gm. for uterus and vagina respectively). Concurrent administration of ODB and TST led to a greater degree of hypertrophy of the oviducts than did administration of ODB alone; both the weight and total hexosamine content of the magnum showed a greater relative increase than did the values for vagina and uterus. Some modifications of the method of determining the hexosamine content of tissues are described.

Maternal-Neonatal Serum Vitamin A Concentrations

1989 ◽  
Vol 9 (1) ◽  
pp. 62-66 ◽  
Author(s):  
Girish S. Shirali ◽  
David G. Oelberg ◽  
Kumud P. Mehta
Keyword(s):  
Vitamin A ◽  
Serum Vitamin

Gonadal hormones organize and modulate the circadian system of the rat

1981 ◽  
Vol 241 (1) ◽  
pp. R62-R66 ◽  
Author(s):  
H. E. Albers
Keyword(s):  
Testosterone Propionate ◽  
Wheel Running ◽  
Activity Rhythm ◽  
Gonadal Hormones ◽  
Circadian System ◽  
Female Rats ◽  
Constant Darkness ◽  
Before And After ◽  
Free Running ◽  
Free Running Period

The circadian wheel-running rhythms of gonadectomized adult male, female, and perinatally androgenized female rats, maintained in constant darkness, were examined before and after implantation of Silastic capsules containing cholesterol (C) or estradiol-17 beta (E). The free-running period of the activity rhythm (tau) before capsule implantation tended to be shorter in animals exposed to perinatal androgen. Administration of C did not reliably alter tau in any group. E significantly shortened tau in 100% of females injected with oil on day 3 of life. In females, injected with 3.5 micrograms testosterone propionate on day 3, and males, E shortened or lengthened tau, with the direction and magnitude of this change in tau inversely related to the length of the individual's pretreatment tau. These data indicate that the presence of perinatal androgen does not eliminate the sensitivity of the circadian system of the rat to estrogen, since estrogen alters tau in a manner that depends on its pretreatment length.

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