scholarly journals Histochemical Study of the Rat Uterine Glycoconjugate Alteration following Treatment with Exogenous Gonadotropic Hormones during the Implantation Period

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Elham Aliabadi ◽  
Zohreh Makoolati ◽  
Tahereh Talaei-Khozani ◽  
Fakhreddin Mesbah Ardekani ◽  
Arvin Aliabadi
Keyword(s):  
Basement Membrane ◽  
Optimal Dose ◽  
Molecular Organization ◽  
Control Group ◽  
Implantation Time ◽  
Hormonal Manipulation ◽  
Uterine Gland ◽  
Serum Gonadotropin ◽  
Golgi Zone ◽  
Implantation Period

One of the female causes of infertility is anovulation which is treatable with gonadotropin hormones. These hormones affect the molecular organization of the uterus such as glycoconjugates that are the first site of contact between the blastocyst and the uterus. The objective of this project was to study the alteration of glycoconjugates on the uterine apical, Golgi zone, and basement membrane of epithelial cells and the uterine gland after hyperstimulation with pregnant mare serum gonadotropin (PMSG) (4, 8, 16, 24, and 40 IU), during the implantation period. Injection of PMSG (in experimental groups) and injection of distilled water (in the control group) were followed by HCG administration (10 IU), mating, isolation of positive vaginal plug rats, and killing at 5.5 days of pregnancy. Histochemistry was done on the pregnant uterine horns with the use of WGA, DBA, PNA, ConA, SBA, and UEA lectins. The intensity of the immunohistochemical staining was scored, and quantitative data were generated. 4 IU did not show any significant differences with the control, 8 IU had less effect on the alteration of the Golgi zone, and apical and basement membrane glycoconjugates and 40 IU had the least effects on the alteration of uterine gland glycoconjugates. Also, 24 IU had the most effect on the alteration of uterine glycoconjugates. Understanding of the effects of gonadotropin hormones at the uterine level in implantation time helps to optimize hormonal manipulation for improving the outcome of assisted reproductive procedures. It seems that the optimal dose for superovulation and less alteration in uterine glycoconjugates of rats at implantation time were induced by the administration of 8 IU PMSG.

The use of poly additive Nabicat in the feeding of laying hens

2020 ◽  
pp. 44-55
Author(s):  
S. Nikolaev ◽  
L. Andreenko
Keyword(s):  
Laying Hens ◽  
Optimal Dose ◽  
Control Group ◽  
Nutrient Metabolism ◽  
Volgograd Region ◽  
Mineral Components ◽  
Environmentally Safe ◽  
Experimental Group ◽  
Poultry Farming

In modern poultry farming the most urgent tasks are to search for and test new environmentally safe feed and economically justifi ed additives that stimulate productivity, positively aff ect the health of poultry, and consequently increase the livability of livestock and other important zootechnical traits. In order to maintain physiologically normal processes of life, metabolism and increase the level of productivity of poultry it needs mineral components and their chelated compounds. The purpose of this work was to increase the egg productivity of poultry by using the silicon-containing poly additive Nabicat in feeding young hens and laying hens. The researches have been carried out on the poultry cross Highsex Brown under the environments in CJSC “Poultry Farm “Volzhskaya” in the Sredneakhtubinsky area in the Volgograd region. In this paper, The optimal dose of the introduction of the silicon-containing poly additive Nabicat in the diets of young and laying hens of the cross Highsex Brown has been scientifi cally justifi ed and the biological value of using an organic form of silicon has been determined. The positive infl uence of the optimal dose of poly additive on growth, consumption, and digestibility, nutrient metabolism in the poultry body, as well as egg productivity and quality of the resulting egg has been revealed. Thus, the average egg productivity per 1 hen in the control group during the experiment period was 321,3 pcs., and in the 1st, 2nd and 3rd experimental groups it was 322,6 pcs., 325,8 and 325,7 pcs., which was higher than in the control group by 0,40 %, 1,40 and 1,37 %, respectively. The average egg weight in the 1st experimental group exceeded the control by 0,43 g or 0,68 %, in the 2nd experimental group by 1,16 g or 1,84 %, in the 3rd experimental group by 0,81 g or 1,28 %. The economic eff ectiveness of using the organic silicon additive in the composition of Nabicat poly additive in the feeding of laying hens has been proved. The economic eff ect due to the use of diff erent doses of the introduction of silicon-containing poly additive Nabicat in compound feed for laying hens of the 1st experimental group was 141,66 rubles, the 2nd experimental group 962,76 rubles, and the 3rd experimental group 821,89 rubles.

Abstract 5369: Mesenchymal Stem Cells Overexpressing CXCR4 (CXCR4 + -MSCs) Attenuate Remodeling of Post-Myocardial Infarction by Releasing Anti-Fibrotic Enzymes

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Tao Wang ◽  
Yigang Wang ◽  
Dongsheng Zhang ◽  
Tiemin Zhao ◽  
Atif Ashraf ◽  
...  
Keyword(s):  
Basement Membrane ◽  
Ventricular Remodeling ◽  
Interstitial Fibrosis ◽  
Ex Vivo ◽  
Genetically Engineered ◽  
Control Group ◽  
Hypoxic Conditions ◽  
Antibody Staining ◽  
Adenoviral Transduction

We hypothesize that CXCR4 + -MSCs penetrate and proliferate in infracted heart by releasing collagen degrading enzymes. We genetically engineered male mouse MSCs using ex vivo adenoviral transduction for over-expression of CXCR4/GFP or GFP alone. MSCs (G-I) or CXCR4 + -MSCs (G-II) or CXCR4 + -MSCs treated with epigallocarechin gallate (EGCG, 50μg/ml), a MT1-matrix metalloproteinases (MMPs) inhibitor (G-III) or CXCR4 + -MSCs with AMD3100 (5 μg/mL), a CXCR4-selective antagonist (G-IV). A Trans-Matrigel Chemoinvasion Assay was used to evaluate the ability of MSCs to cross the basement membrane. MMPs were analyzed by Western blot and MMP antibody staining. Sex mismatched MSCs were infused into female mice via a tail vein injection 3 days after MI. Mice in G-III were treated with EGCG (100 mg/kg, oral gavage, daily for 2 weeks) to inhibit MMPs and G-IV was treated with AMD3100 (1 mg/kg, i.p. given continually for 6 days after MI). LV fibrosis was detected by Picrosirius red staining. Echocardiography was performed at 4 weeks after MI and hearts were harvested for histological analysis. In vitro, cell migration was significantly higher in G-II in the presence of SDF-1α as compared with other groups, ( p <0.01). EGCG or AMD3100 markedly prevented this response. MMP-9 and MT1-MMP were upregulated significantly only in G-II (p<0.01) exposed to hypoxia. Infiltration of GFP and Y chromosome positive cells in the peri- or infarct area was increased significantly in G-II. CXCR4 + -MSCs penetrated more effectively into the infarcted region and survived in the ischemic environment as compared to control group. These effects were reduced with EGCG or AMD3100. The ventricular remodeling and interstitial fibrosis were also reduced in G-II but not in other groups. G-II also had less LV dilation (diastolic dimension 4.9±0.2 vs. 6.2±0.3 mm, p<0.05), EF (62±3 vs. 44±4%, p<0.05). Infarct size (31±3.8 vs 43±4.7% of LV, p<0.05) and collagen area fraction (16±2 vs. 28±4 %, p<0.05) were significantly reduced in G-2 compared to G-I. Under hypoxic conditions MMPs were upregulated in CXCR4 + -MSCs which crossed the basement membrane by releasing enzymes leading to breakdown or reduction of scar formation thus facilitating cell homing and proliferation.

Inhibitory Effects of Indomethacin on Implantation and its Related Phenomena

1996 ◽  
Vol 24 (4) ◽  
pp. 358-362 ◽  
Author(s):  
K Kanayama ◽  
H Osada ◽  
K Nariai ◽  
T Endo
Keyword(s):  
Birth Rate ◽  
Inhibitory Effect ◽  
High Rate ◽  
Control Group ◽  
Corpora Lutea ◽  
Response Relationship ◽  
Inhibitory Effects ◽  
Dose Response Relationship ◽  
Dose Dependent ◽  
Implantation Period

The dose-response relationship for the inhibitory effect of indomethacin on implantation and continuance of pregnancy was examined in four groups of rabbits administered with indomethacin (2.5, 5.0, 7.5 and 10.0 mg/kg) during the implantation period and compared with a control group. Implanted fetuses and corpora lutea were counted by laparotomy, and the number of offspring born was noted. The inhibitory effect of indomethacin on implantation was found to be dose–dependent, and the birth rate decreased in the indomethacin groups compared with the control group. As a result, even where implantation had been achieved, death of the implanted fetuses occurred at a high rate in rabbits administered with indomethacin during the implantation period.

scholarly journals The economic efficiency of the use of mixed ligand complexes of Zinc, Manganese and Cobalt in the rations of highlyproductive cows of the Ukrain-ian Red-Spotted Dairy breed

2021 ◽  
Vol 23 (95) ◽  
pp. 82-86
Author(s):  
Yu. G. Kropyvka ◽  
V. S. Bomko ◽  
S. Y. Kropyvka
Keyword(s):  
Economic Efficiency ◽  
Economic Effect ◽  
Optimal Dose ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Control Group ◽  
Feed Mixture ◽  
Set Up ◽  
Experimental Group ◽  
Dairy Breed

The article deals with the results of research on the economic efficiency of the use of mixed ligand complexes of Zinc, Manganese and Cobalt in the feeding rations of highlyproductive cows of Ukrainian Red-Spotted Dairy breed in the first 100 days of lactation. The research was performed on five groups (one control and four experimental) of analogous cows in the conditions of ALC “Terezyne” Bila Tserkva district of Kyiv region. The control was the optimal dose of mixed ligand complexes of Zinc, Manganese and Cobalt, which was previously established with a concentration of 1 kg of dry matter (DM) of the feed mixture (FM), mg: Zinc – 60.8; Manganese – 60.8 and Cobalt – 0.78. For the 2nd experimental group, the concentration of these trace elements was increased by 10 %, and in the 3rd, 4th and 5th experimental groups – on the contrary, the concentration of Zinc, Manganese and Cobalt in 1 kg of DM of feed mixture was reduced by 10 %, 20 and 30 %, respectively, compared with the control. The best results on milk yield of natural and basic fat content were got from cows of the 4th experimental group, where the concentration of Zinc, Manganese and Cobalt due to their mixed ligand complexes in 1 kg of DM of feed mixture was, mg: Zinc – 48.6; Manganese – 48.6; Cobalt – 0.62. The cost of products got from experimental cows ranged from UAH 12702.3 up to UAH 13783.7 and it was the highest in the 4th experimental group. It was set up that for cows of Ukrainian Red-Spotted Dairy breed in the first 100 days of lactation the most economically advantageous was the dose of mixed ligand complexes, in which the concentration of Zinc and Manganese was 48.6 mg, and Cobalt – 0.62 mg/kg DM, which allowed to obtain a profit of 14.37 % more than in the control group. Doses of mixed ligand complexes with a concentration of Zinc and Manganese – 66.9 mg; 54.7 and 42.6 mg, and Cobalt – 0.86 mg; 0.7 and 0.55 mg/kg CF gave a much lower economic effect. Additional profit in the 2nd experimental group amounted to UAH 66.8 or 1.34 %; in the 3rd – UAH 95.6 or 1.92 % and in the 5th – UAH 561.6 or 11.28 %, compared with the control group.

Construction of Hyperuricemia Model Rats with Yeast Extract Combined with Oteracil Potassium

2020 ◽  
Author(s):  
Dilidaer Xilifu ◽  
Alimu Kateer ◽  
Nijiati Rehemu ◽  
Zhao-yong Li ◽  
jie Jiang ◽  
...  
Keyword(s):  
Uric Acid ◽  
Serum Uric Acid ◽  
Yeast Extract ◽  
Intraperitoneal Injection ◽  
Rat Kidney ◽  
Optimal Dose ◽  
Serum Levels ◽  
Male Rats ◽  
Control Group ◽  
Optimal Dosage

Abstract Background: Hyperuricemia is the most important risk factor for gout, hypertension, coronary artery disease and other cardiovascular diseases. The incidence of hyperuricemia gradually increased in recent years and it is very necessary to explore the medications of the prevention and treatment of hyperuricemia using hyperuricemia animal models. Objective: The objective of present study is to explore the optimal dose of yeast extract and oteracil potassium in the establishment of hyperuricemia rat model. Method: Sixty-four male rats were randomly divided into 8 experimental groups. Rats were treated with yeast extract by intraperitoneal injection or yeast extract by intraperitoneal injection combined with various doses of oteracil potassium by intragastric feeding or intraperitoneal injection for 28 days. The serum uric acid, urea nitrogen and creatinine levels of different groups were measured at 0th day, 7th day, 14th day, 21th day and 28th day. Results: The serum levels of uric acid in the groups of intraperitoneal injection with yeast extract alone, yeast extract by intraperitoneal injection combined with 50-200 mg/kg oteracil potassium by intragastric feeding and yeast extract by intraperitoneal injection combined with 50-100 mg/kg oteracil potassium by intraperitoneal injection were higher than that in the control group. But we found no significant effect on rat kidney, heart or artery in the above groups. In the group of yeast extract by intraperitoneal injection combined with 200 mg/kg oteracil potassium by intraperitoneal injection, we observed the significantly high level of serum uric acid and morphological and pathological changes in rat kidney, heart and artery. Conclusion: In the present study, we found that continuously treated with yeast extract combined with oteracil potassium is an effective method to establish rat hyperuricemia model. Intraperitoneal injection of yeast extract combined with 200 mg/kg oteracil potassium is an optimal dosage for the construction of a persistent and stable hyperuricemia animal model.

255. Hormonal manipulation on the phenotype of ArKO female mice

2008 ◽  
Vol 20 (9) ◽  
pp. 55
Author(s):  
S. H. Liew ◽  
A. E. Drummond ◽  
J. E. Margaret ◽  
J. K. Findlay
Keyword(s):  
Follicular Development ◽  
Rna Isolation ◽  
Female Mice ◽  
Androgen Treatment ◽  
Hormonal Manipulation ◽  
Cyclical Pattern ◽  
Serum Gonadotropin ◽  
Group 2 ◽  
Gene Expression Studies ◽  
Reproductive Phenotype

Gonadotrophins and steroid hormones are vital in controlling the cyclical pattern of ovarian follicular development essential for fertility. Previous studies have shown that ArKO (aromatase knockout) female mice are infertile due to the absence of oestrogen, elevated levels of circulating gonadotrophins and testosterone and folliculogenic disruption. Therefore, the aim of this study was to determine the effects of E2 (oestradiol-17β) replacement, Acyline (GnRH antagonist) and Flutamide (anti-androgen) treatment on ArKO female mice. WT and ArKO female mice (C57B6/J129; 16 weeks old; n = 6–8/grp) were assigned into three main groups: group 1 - received either E2 (0.05 mg) pellet or placebo, group 2 - received either a single s.c. injection of acyline (1.5 mg/kg/week) or placebo and group 3 – received either flutamide (25 mg) pellet or placebo for 3 weeks. Mice were subjected to daily vaginal smears. The ovaries and uterine horns were collected and weighed. One ovary and the uterine horns were fixed in formalin for histological assessment, while the other ovary was snap frozen in Ultraspec solution for RNA isolation and gene expression studies. Serum was collected for hormone measurements. All female ArKO mice exhibited an abnormal cycle that alternated between diestrus and early oestrus. E2 replacement restored the oestrus cycle in ArKO female mice but acyline and flutamide treatment did not. Histologically, hemorrhagic cystic follicles were present in all placebo, acyline and flutamide treated ArKO ovaries, however, E2 replacement improved the ovarian and uterine phenotypes. E2 replacement and acyline treatment also led to a decrease in serum gonadotropin levels in ArKO mice. In summary, E2 replacement could reverse the abnormal reproductive phenotype of the ArKO female mice. This study suggests that the reproductive phenotype of the ArKO female mouse is due to the direct effect of oestrogen and not due to the elevated circulating levels of gonadotrophins and testosterone. Supported by NH&MRC (Regkeys 241000, 338510 and 198705)

scholarly journals Efficacy and safety of atropine to control myopia progression: a systematic review and meta-analysis

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Congling Zhao ◽  
Chunyan Cai ◽  
Qiang Ding ◽  
Hongbin Dai
Keyword(s):  
Meta Analysis ◽  
Optimal Dose ◽  
Control Group ◽  
Controlled Trials ◽  
Cochrane Central Register ◽  
Myopia Progression ◽  
Central Register ◽  
Atropine Treatment ◽  
Observation Period

Abstract Background The effect and safety of atropine on delaying the progression of myopia has been extensively studied, but its optimal dose is still unclear. Therefore, the purpose of this meta-analysis is to systematically evaluate the safety and effectiveness of atropine in controlling the progression of myopia, and to explore the relationship between the dose of atropine and the effectiveness of controlling the progression of myopia. Methods This work was done through the data searched from PubMed, MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials. The Cochrane Handbook was also used to evaluate the quality of the included studies. In addition, a meta-analysis was performed using Revman5.3 software. Results A total of 10 randomized controlled trials (RCTs) were included. Myopia progression was mitigated greater in the atropine treatment group than that in the control group, with MD = − 0.80, 95% CI (− 0.94, − 0.66) during the whole observation period. There was a statistical difference among 0.05, 0.5, and 1.0% atropine (P = 0.004). In addition, less axial elongation was shown, with MD = − 0.26, 95% CI (− 0.33, − 0.18) during the whole observation period. Conclusion The effectiveness of atropine in controlling the progression of myopia was dose related. A 0.05% atropine was likely to be the optimal dose.

scholarly journals Corticosterone Injection Impairs Follicular Development, Ovulation and Steroidogenesis Capacity in Mice Ovary

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1047 ◽  
Author(s):  
Wei ◽  
Li ◽  
Meng ◽  
Zhang ◽  
Shen ◽  
...  
Keyword(s):  
Treatment Group ◽  
Horse Serum ◽  
Follicular Development ◽  
Control Group ◽  
Ovarian Weight ◽  
Stressful Environment ◽  
Methyl Sulfoxide ◽  
Ovarian Granulosa Cell ◽  
Serum Gonadotropin ◽  
Ovarian Index

The aim of this study is to establish an ovarian stress model, and to investigate the effects of stress on follicular development. Our data showed that continuous intraperitoneal injection of CORT successfully created a stressful environment in the ovary. To assess the effects of CORT on ovarian functions, 80 three-week-old ICR (Institute of Cancer Research) female mice were randomly divided into control group and treatment group. All mice were injected intraperitoneally with pregnant horse serum gonadotropin (PMSG). At the same time, the treatment group were injected with CORT (1 mg/mouse) at intervals of 8 h; while the control group was injected with same volume of methyl sulfoxide (DMSO). Blood, ovaries, or ovarian granulosa cell samples were collected at 24 h, 48 h, and 55 h after PMSG injection. The results showed that, compared with the control group, CORT-injected mice revealed a significant decrease in ovulation rates, ovarian weight, ovarian index, the number of secondary follicles and mature follicles, levels of estrogen and progesterone, and mRNA expression of steroid synthase-related genes. Collectively, our findings clearly demonstrated that CORT injection could represent an effective practice to simulate stresses that inhibit ovarian functions by reducing follicular development and ovulation.

POSTWEANING PLASMA CONCENTRATIONS OF LUTEINIZING HORMONE AND ESTROGENS IN SOWS: EFFECT OF TREATMENT WITH PREGNANT MARE’S SERUM GONADOTROPIN OR ESTRADIOL-17β PLUS PROGESTERONE

1979 ◽  
Vol 59 (1) ◽  
pp. 159-166 ◽  
Author(s):  
G. W. DYCK ◽  
W. M. PALMER ◽  
S. SIMARAKS
Keyword(s):  
Luteinizing Hormone ◽  
Plasma Concentrations ◽  
Treated Group ◽  
Linear Increase ◽  
Control Group ◽  
History Of ◽  
Serum Gonadotropin ◽  
Effect Of Treatment ◽  
Secretory Pattern ◽  
Estradiol 17Β

The plasma concentrations of luteinizing hormone (LH) and estrogens (E) were determined for 12 sows, from a herd with a history of postweaning anestrus, from the day of weaning to 32 days after weaning (trial I). A linear increase in plasma LH and E was observed in six sows which remained in anestrus (LH, 0.32–0.47 ng/ml; E, 16.1–24.7 pg/ml). These concentrations were similar to those observed in cycling sows during diestrus. In the remaining sows concurrent peaks of LH and E were observed during proestrus and estrus. In a second trial, two groups each of five sows were treated with a single injection of pregnant mare’s serum gonadotropin (PMSG, 1500 IU) or steroids (estradiol-17β, 1 mg plus progesterone, 2 mg) on the day after weaning. The plasma concentrations of LH and E for 10–12 days after weaning were compared with those of five untreated control sows. In the PMSG-treated group, concurrent peaks of LH (4.7 ± 0.5 ng/ml) and E (121 ± 41 pg/ml) were observed at estrus. The control group produced a lower LH peak at estrus (1.5 ± 0.4 ng/ml) which was not accompanied by a rise in plasma E. No consistent secretory pattern for plasma LH and E was observed in the steroid treatment group.

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