Actions of oestradiol and progesterone on the prostate in female gerbils: reversal of the histological effects of castration

2014 ◽  
Vol 26 (4) ◽  
pp. 540 ◽  
Author(s):  
Marianna Zanatelli ◽  
Diego A. L. Silva ◽  
Filipe Z. Shinohara ◽  
Rejane M. Góes ◽  
Fernanda C. A. Santos ◽  
...  
Keyword(s):  
Mammalian Species ◽  
Prostate Gland ◽  
Secretory Activity ◽  
Hormone Treatment ◽  
Treated Group ◽  
Mineral Oil ◽  
Serum Concentrations ◽  
Prolonged Administration ◽  
Female Prostate ◽  
Active Gland

The female prostate is a functionally active gland in several mammalian species, including humans and rodents. Investigations of prostate morphophysiology during the phases of the oestrous cycle have shown that the female prostate is influenced by fluctuations in serum concentrations of oestradiol (E2) and progesterone (P4). The aim of the present study was to evaluate the effect of combined prolonged administration of E2 and P4 on the prostate in ovariectomised female gerbils. Ovariectomy caused atrophy and decreased glandular secretory activity. Administration of E2 and P4 (0.1 mg kg–1 diluted in 0.1 mL of mineral oil, every 48 h over 30 days) resulted in a recovery of overall prostate structure, as evidenced by increased epithelial height, mass and prostatic secretory activity, without leading the appearance of significant lesions. Evaluation of androgen receptor (AR) expression revealed increased immunoreactivity in the E2+P4-treated group. Immunostaining for oestrogen receptor (ER) α was decreased in the castrated groups, but increased in the group subjected to hormone treatment. There were no significant differences in ERβ immunoreactivity among the groups. Assessment of cell proliferation revealed greater immunoreactivity in the treated group. Together, the results indicate that the interaction between E2 and P4 may be responsible for maintaining female prostate gland histophysiology.

scholarly journals Melatonin administration provokes the activity of dendritic reticular cells in the seminal vesicle of Soay ram during the non-breeding season

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hanan H. Abd-Elhafeez ◽  
A. H. S. Hassan ◽  
Manal T. Hussein
Keyword(s):  
Estrogen Receptor Alpha ◽  
Close Contact ◽  
Secretory Activity ◽  
Treated Group ◽  
Nerve Fibers ◽  
Stimulatory Action ◽  
Transmission Electron ◽  
Melatonin Administration ◽  
S 100 ◽  
Lysosomal System

AbstractDendritic cells (DCs) are innate immune cells which engulf, process and present antigens to the naïve T-lymphocyte cells. However, little is known about the effect of melatonin on the DCs. The present study aimed to investigate the morphology and distribution of the DCs by transmission electron microscopy and Immunohistochemistry after melatonin administration. A total of 8 out of 15 adult ram was randomly selected to receive the melatonin implant and the remaining 7 animals received melatonin free implants. DCs showed positive immunoreactivity for CD117, S-100 protein and CD34. There is an obvious increase in the number of the positive immunoreactive cells to CD3, estrogen receptor alpha and progesterone in the treated groups. The expression of CD56 and MHCII in the DCs was abundant in the treated groups. The ultrastructure study revealed that melatonin exerts a stimulatory effect on the DCs which was associated with increment in the secretory activity of DCs. The secretory activity demarcated by an obvious increase in the number of mitochondria, cisternae of rER and a well-developed Golgi apparatus. The endosomal- lysosomal system was more developed in the treated groups. A rod-shaped Birbeck granule was demonstrated in the cytoplasm of the melatonin treated group. DCs were observed in a close contact to telocytes, T-Lymphocytes, nerve fibers and blood vessels. Taken together, melatonin administration elicits a stimulatory action on the DCs and macrophages through increasing the size, the number and the endosomal compartments which may correlate to increased immunity.

Effect of Melatonin on Telocytes in the Seminal Vesicle of the Soay Ram: An Immunohistochemical, Ultrastructural and Morphometrical Study

2016 ◽  
Vol 203 (1) ◽  
pp. 29-54 ◽  
Author(s):  
Hanan H. Abd-Elhafeez ◽  
Doaa M. Mokhtar ◽  
Ahmed H.S. Hassan
Keyword(s):  
Close Contact ◽  
Intercellular Junctions ◽  
Secretory Activity ◽  
Treated Group ◽  
Control Group ◽  
Secretory Vesicles ◽  
Melatonin Treatment ◽  
Secretory Structures ◽  
Strong Reaction ◽  
Nonbreeding Season

Telocytes (TCs) are a special type of interstitial cell with characteristic cellular processes that are described in many organs. The current study aimed to investigate TCs in seminal vesicles of the Soay ram responding to melatonin treatment during the nonbreeding season by conventional immunohistochemical stains, and to detect the ultrastructural and morphometrical changes of TCs. TCs in the control group showed a broad range of staining affinity and also reacted positively to CD117/c-kit, CD34, desmin, S-100 protein, and progesterone and estrogen receptors alpha, while after melatonin treatment a strong reaction against these 6 antibodies was recorded. Electron microscopically, TCs in the control group were characterized by a small cell body with distinct long cytoplasmic extensions called telopodes (Tps). Tps had alternation of the thin segment (podomers) and dilated segments (podoms), in which the latter accommodate mitochondria, rough endoplasmic reticulum and caveolae. TCs and their Tps were interconnected by homo- and heterocellular junctions and form a wide network to communicate between different cell types. Tps showed close contact with immune cells, progenitor stem cells, smooth muscle cells and other interstitial cells. Melatonin caused a significant increase in the number of TCs, length of Tps, and number and diameter of secretory vesicles. Also, the melatonin-treated group showed exaggerated secretory activity in the form of a massive release of secretory vesicles from Tps. Moreover, Tps showed an increase in their contact with blood and lymphatic capillaries, nerve endings and Schwann cells. In addition, the shedding of secretory structures (exosomes, ectosomes, and multivesicular bodies) was greater from Tps, which were involved in paracrine signaling in the melatonin-treated group. The length and ramifications of Tps together with the intercellular junctions and the releasing of shed vesicles or exosomes assumed an essential role of TCs in intercellular signaling and coordination. On the basis of their distribution and morphology, we investigated whether the different locations of TCs could be associated with different roles.

HP-05-005 Ultrasound study of blood flow in vessels of female prostate gland

2019 ◽  
Vol 16 (5) ◽  
pp. S39
Author(s):  
O. Romashchenko ◽  
V. Grygorenko ◽  
V. Biloholovska ◽  
S. Melnykov ◽  
M. Kosiukhno
Keyword(s):  
Blood Flow ◽  
Prostate Gland ◽  
Female Prostate ◽  
Ultrasound Study

276 ACTIVATION OF ROUND SPERMATID-INJECTED OOCYTES USING PHOSPHOLIPASE C ZETA IN PIGS

2013 ◽  
Vol 25 (1) ◽  
pp. 286
Author(s):  
J. Ito ◽  
E. Yuhara ◽  
A. Nakamura ◽  
N. Kashiwazaki
Keyword(s):  
Phospholipase C ◽  
Mammalian Species ◽  
Treated Group ◽  
Round Spermatid ◽  
Calcium Oscillations ◽  
Oocyte Activation ◽  
Domestic Species ◽  
Electrical Pulses ◽  
Group 2 ◽  
Pronuclear Formation

In several mammalian species, the generation of offspring by round spermatid injection has been reported. However, in domestic species, including pigs, no one has reported success to date. One of the reasons is that round spermatid-injected oocytes require artificial stimuli for oocyte activation, but the developmental ability of the oocytes is low in pigs, suggesting that a more optimal activation protocol is needed. During fertilization, a sperm-derived factor induces repetitive increases in intracellular calcium, known as calcium oscillations. It is now acknowledged that phospholipase C zeta (PLCζ) has an essential role in inducing calcium oscillations, not only in mammals, but also in several other vertebrates. Therefore, if PLCζ is used as a stimulus for oocyte activation, the efficiency of oocyte activation can be improved. Recently, we found that equine PLCζ (ePLCζ) has higher activity than those of other mammalian species to be studied. In the present study, we examined whether injection of ePLCζ complementary RNA (cRNA) improves the activation of round spermatid-injected oocytes in pigs. First, we examined whether ePLCζ is expressed in round spermatids. Porcine round spermatids were isolated from adult testes, and immunostaining using anti-PLCζ antibody was carried out. The PLCζ was localised at the head and tail in mature sperm, and a part of the round spermatid was also stained. Next, we evaluated the developmental ability of round spermatid-injected oocytes activated by different protocols (electrical pulses v. injection of ePLCζ cRNA). The cytoplasts were then injected with round spermatids. One hour later, the oocytes were divided into two groups. In group 1, the oocytes were activated by a direct current pulse (150 V mm–1 and 60 µs). In group 2, the oocytes were injected with ePLCζ cRNA as follows: the reagent (0.1 µg µL–1) was diluted in injection buffer [100 mM KCl and 10 mM HEPES (pH = 7.0)], loaded into glass micropipettes by aspiration, and delivered to the ooplasm by pneumatic pressure (Narishige, Tokyo, Japan). Each oocyte received 3 to 10 pL (1 to 3% of the total volume of the oocyte). After the stimulations, oocytes were cultured in PZM-5 under 38.5°C in a humidified incubator (95% air, 5% CO2). In the ePLCζ-injected group, rates of pronuclear formation (n = 22/32, 68.8%) and blastocysts (n = 2/43, 4.7%) were higher than those in the electrical pulse-treated group (n = 9/41, 22%; and n = 0/51, 0%, respectively; P < 0.05). In conclusion, our data suggest that injection of PLCζ is effective for activation of round spermatid-injected oocytes in pigs.

scholarly journals Identification of protein IT of the intestinal cytoskeleton as a novel type I cytokeratin with unusual properties and expression patterns.

1990 ◽  
Vol 111 (2) ◽  
pp. 567-580 ◽  
Author(s):  
R Moll ◽  
D L Schiller ◽  
W W Franke
Keyword(s):  
Mammalian Species ◽  
Expression Patterns ◽  
Prostate Gland ◽  
Coiled Coil ◽  
Immunological Methods ◽  
Type I ◽  
Peptide Fragments ◽  
Binding Assays ◽  
Human Intestinal Epithelium

A major cytoskeletal polypeptide (Mr approximately 46,000; protein IT) of human intestinal epithelium was characterized by biochemical and immunological methods. The polypeptide, which was identified as a specific and genuine mRNA product by translation in vitro, reacted, in immunoblotting after SDS-PAGE, only with one of numerous cytokeratin (CK) antisera tested but with none of many monoclonal CK antibodies. In vitro, it formed heterotypic complexes with the type II CK 8, as shown by blot binding assays and gel electrophoresis in 4 M urea, and these complexes assembled into intermediate filaments (IFs) under appropriate conditions. A chymotrypsin-resistant Mr approximately 38,000 core fragment of protein IT could be obtained from cytoskeletal IFs, indicating its inclusion in a coiled coil. Antibodies raised against protein IT decorated typical CK fibril arrays in normal and transformed intestinal cells. Four proteolytic peptide fragments obtained from purified polypeptide IT exhibited significant amino acid sequence homology with corresponding regions of coils I and II of the rod domain of several other type I CKs. Immunocytochemically, the protein was specifically detected as a prominent component of intestinal and gastric foveolar epithelium, urothelial umbrella cells, and Merkel cells of epidermis. Sparse positive epithelial cells were noted in the thymus, bronchus, gall bladder, and prostate gland. The expression of protein IT was generally maintained in primary and metastatic colorectal carcinomas as well as in cell cultures derived therefrom. A corresponding protein was also found in several other mammalian species. We conclude that polypeptide IT is an integral IF component which is related, though somewhat distantly, to type I CKs, and, therefore, we propose to add it to the human CK catalogue as CK 20.

Biosynthetic growth hormone changes the collagen and elastin contents and biomechanical properties of the rat aorta

1991 ◽  
Vol 125 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Annemarie Brüel ◽  
Hans Oxlund
Keyword(s):  
Growth Hormone ◽  
Collagen Type ◽  
Hormone Treatment ◽  
Treated Group ◽  
Collagen Type I ◽  
Biochemical Properties ◽  
The Body ◽  
Female Rats ◽  
Control Group ◽  
Type I

Abstract The biomechanical and biochemical properties of aortas from female rats treated with biosynthetic human GH (b-hGH) for 80 days were investigated. b-hGH was administered at a dose of 5 mg·kg−1·d−1. Treatment with b-hGH increased the body weight by 75% and the diameter of the aorta by 14% compared with the control group. The concentration of collagen and the relative amount of collagen type I were increased, and the concentration of elastin was decreased. Aortas from the b-hGH-treated group showed increased extensibility in the regions corresponding to physiological load values (i.e. 100-200 mmHg), and increased stiffness in regions with higher load values. The increased extensibility at low load values corresponds well with the loss of elastin, and the increased stiffness at higher load values with the increase of collagen and relative increase of collagen type I. These alterations induced by the growth hormone treatment might influence the elasticity and recoiling properties of the aorta.

THE INFLUENCE OF GROWTH HORMONE TREATMENT ON THYROID FUNCTION IN SWINE

1990 ◽  
Vol 70 (3) ◽  
pp. 991-995 ◽  
Author(s):  
R. N. KIRKWOOD ◽  
P. A. THACKER ◽  
B. LAARVELD
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Key Words ◽  
Growth Hormone Treatment ◽  
Sampling Period ◽  
Hormone Treatment ◽  
Serum Concentrations ◽  
Significant Treatment ◽  
Blood Samples ◽  
To Receive

Twelve castrated male pigs of Yorkshire and Landrace breeding were selected at 95.9 ± 1.6 kg body weight (BW) and allocated equally to receive daily injections of either porcine growth hormone (pGH) at 90 μg kg−1 BW or vehicle buffer for four consecutive days. Following the last pGH injection, the pigs were infused via indwelling vena caval cannulae with thyrotropin-releasing hormone (TRH) at 0.5 μg kg−1 BW. Blood samples were obtained at 10 and 0 min before TRH and thereafter at 10-min intervals for 90 min. Serum concentrations of thyroxine and thyrotropin were lower (P < 0.06 and P < 0.1, respectively) but those of triiodothyronine higher (P < 0.01) in pGH-treated pigs throughout the sampling period. There were no significant treatment-by-time interactions indicating that the thyroid response to TRH was not influenced by pGH treatment. Key words: Swine, thyroid, growth hormone, somatotropin

scholarly journals Parathyroid function and calcium concentration in serum of dexamethasone treated rabbits

2000 ◽  
Vol 24 (2) ◽  
pp. 121-133
Author(s):  
Mashi S. K. ◽  
Al-Ar'rak J. K.
Keyword(s):  
Parathyroid Gland ◽  
Physiological Saline ◽  
Secretory Activity ◽  
Treated Group ◽  
Control Group ◽  
Tissue Samples ◽  
Functional Changes ◽  
Parathyroid Function ◽  
Physiological Saline Solution ◽  
Therapeutic Doses

This experiment was carried out to determine structural functional changes which could be caused due to uses of dexamethasone at daily therapeutic doses in rabbits for a reasonable period. Ten adult male rabbits were randomly divided into two equal groups control and treatment. Animals of the treatment group were intramuscularly injected with dexamethasone sod. citrate (0.06 mg/100g.B.W.) for 14 days. Animals of control group received the same dose of normal physiological saline solution blood samples were collected every other day until 48 hours after the last injection serum was isolated for measurement of calcium concentrations. At the end of the experiment tissue samples from the parathyroid glands were isolate to prepare histological stained sections . Dexamethasone did not cause significant changes in serum concentration of calcium of treated group compared with its concentrations in control group. Light microscopic examination of hematoxylin eosion stained sections of parathyroid gland showed enlargement and increase in number of light chief cells indicating increased secretory activity due to dexamethasone injection. The increased of parathyroid gland activity explain the maintenance of total calcium level within the normal range in spite of the expected hypocalcemia due to dexamethasone administration. 

scholarly journals The effect of the phenolic and other active compounds of the alcohol and acid extracts of cinnamon on some of the Biochemical Parameters of induced diabetes mellitus

2015 ◽  
Vol 9 (1) ◽  
pp. 24-36
Author(s):  
Hayder Turki AL-Musaw AL-Musawi ◽  
Mohammed Ibrahem AL-Tai AL-Tai ◽  
Muna Turki AL-Musawi AL-Musawi
Keyword(s):  
Body Weight ◽  
Density Lipoprotein ◽  
Treated Group ◽  
Laboratory Animals ◽  
Control Group ◽  
Alcoholic Extract ◽  
Serum Concentrations ◽  
Active Compounds ◽  
Cinnamon Extract ◽  
Long Duration

The phenolic compound and other active compounds were extracted from cinnamon, in anattempt to produce a drug from Medical and herbal Plants for the diabetes on rats. Theextraction process included two methods the first carrid out with 2% v/v acetic acid andpropanol, and in the second process 70% v/v ethanol and chloroform were used. In the detectionof extracts it was noticed that both conteined phenols, flavonoids, tannins and Glycosides andCoumarins, while the saponin showed up only in the alcoholic extract of cinnamon. The phenoliccompounds in the extracts of cinnamon were determined by using Ultraviolet Spectroscopy (UV)and other function groups such as phenols, aldehyedes, estars, hydrocarbons, alcohols andcarboxylic compounds were diagnosed by using Infrared spectroscopy (IR). The study of the halflethal dose (midl lethal) (LD50) was also examined by testing the toxicity of the two cinnamon 2015 مجلة مركز بحوث التقنيات االحيائية المجلد التاسع- العدد االول42extracts. Rats were used as laboratory animals in conducting the experiments. The rats were fedby the dose (100, 200, 300,400, 500 mg / kg of body weight). The results have shown that there isno toxic effect in the cinnamon extracts. Similar concentrations were used to determine theeffective dose of the extracts in reducing the level of glucose in the blood of healthy animals. Thedose (300) mg / kg of body weight of the animal body has proved to be the the most efficient as itdecreased. The fasting glucose (Glu) serum consider by following of the cinnamon extracts withthe adopted groups during the duration of (30) days in comparison with the control group (theinfected) and outperformed the treated given Glibenelinide (daonil) group. The biochemical testsshowed that the serum concentrations of each of cholesterol (TC),Triglyceride (TG), low densitylipoprotein (LDL-C) was lowered in each of the groups treated with both cinnamon extracts incomparison with the positive groups (infected) throughout the duration (30) days and overcomethe daonil treated group. However the serum high density lipoprotein (HDL-C) level wasincreased in cinnamon extract treated groups and decreased in the control group (infected).The serum concentrations of enzymes (GOT) and (GPT) were measured to test the liver functionafter where their levels were lowered after (30) days in the cinnamon extracts administeredgroups compared with the two other groups, the control (positive) and the Daonil. The Urea andCreatinine levels were measured to determine or test the kidney functions, where it was observedas from the early days of the infection in that animals infected by induced diabetes developedsymptoms of the illness, apparent in the high levels of urine which affected the functions ofkidney, but the long duration (30 days) of treatment with these extracts of cinnamon proved theirefficiency over the control group (positive).

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