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Wyświetlanie 1-15 z 22
Tytuł:
The pattern of steroid secretion by perifused preovulatory rat follicles
Autorzy:
Szoltys, M
Powiązania:
https://bibliotekanauki.pl/articles/70002.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
radioimmunoassay
steroid production
progesterone
rat follicle
steroid
endocrinology
steroid analysis
ovulation
androgen
animal physiology
gonadotrophin
hormone free
secretion
estradiol
Źródło:
Journal of Physiology and Pharmacology; 1995, 46, 1
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of administration of biotin and zinc chelate (Zn-methionine) to cows in the first and second trimester of lactation on their health and productivity
Autorzy:
Kinal, S.
Twardon, J.
Bednarski, M.
Pres, J.
Bodarski, R.
Slupczynska, M.
Ochota, M.
Dejneka, G.
Powiązania:
https://bibliotekanauki.pl/articles/32375.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
animal health
animal productivity
biotin administration
cow
first lactation trimester
lactation
methionine
second lactation trimester
zinc chelate
dairy cow
blood serum
mineral level
acid-base balance
milk productivity
milk composition
progesterone
haptoglobin level
Opis:
In cattle, the prevention of diseases might be possible using dietary methods, with nutritional optimization of feed rations. For years significant influence has been associated with the addition of biotin, methionine and zinc (each given individually, or as chelate – Zn-methionine). The aim of this study was to evaluate the influence of biotin or biotin + Zn-methionine additives on the health and performance of cows, in the first and second trimester of lactation. This study was carried out in 3 groups of cows, 30 animals in each group. In the first group cows were fed the usual fodder used on the farm. In the second group biotin at 10 mg/day/cow was added. In the third group both biotin at 10 mg/day/cow and Zn-methionine at 5 g/day/cow were added. The administration of biotin increased the milk yield and reduced the occurrence of retained placenta, as well as endometritis puerperalis. However, the high doses of biotin suppressed ovulation and oestrus symptoms in the investigated cows (low progesterone levels on days 15, 21 and 45 after calving). Zn-methionine in comparison to biotin had a lower effect on the milk yield in the cows. Moreover, its supplementation improved the milk content, as well as some of the blood parameters; it also decreased the number of somatic cells in milk. The concurrent administration of biotin and zinc-methionine seemed to be a good method for the prophylaxis of subacute mastitis and for the improvement of the high yielding dairy cows’ productivity.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of progesterone on oxytocin-stimulated intracellular Ca2plus mobilisation and prostaglandin secretion in porcine endometrium
Autorzy:
Kotwica, G.
Oponowicz, A.
Kurowicka, B.
Franczak, A.
Bogacka, I.
Powiązania:
https://bibliotekanauki.pl/articles/31688.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
progesterone
oxytocin
intracellular calcium
calcium
prostaglandin secretion
porcine endometrium
endometrium
pregnancy
pig
hormone
Opis:
We have studied in the porcine endometrium the expression of oxytocin receptor (OTR) mRNA and the effect of progesterone (P₄) on oxytocin/oxytocin receptor (OT/OTR) function concerning intracellular Ca²⁺mobilisation ([Ca²⁺]i), prostaglandin F2α (PGF2α) and E2 (PGE2; PG) secretion. Tissue was taken from cyclic and early pregnant pigs (days 14-16). A higher expression of OTR mRNA (P<0.05) was observed in the endometrium of cyclic than pregnant pigs. The stimulatory (P<0.05) effect of OT (10⁻⁷ M) on [Ca²⁺]i mobilisation was noticed within 15-60 s and 30-60 s in endometrial stromal cells of cyclic and pregnant pigs, respectively. In the presence of P₄ (10⁻⁵ M) basal and OT-stimulated [Ca²⁺]i concentrations decreased in stromal cells during luteolysis and pregnancy. In stromal cells P₄ delayed mobilisation of [Ca²⁺]i in response to OT by 15 s during luteolysis and had no effect during pregnancy. In cyclic and pregnant epithelial cells OT stimulated mobilisation of [Ca²⁺]i in 45 s and 60 s, respectively. Oxytocin increased (P<0.05) PGF2α secretion during luteolysis and pregnancy and PGE2 during luteolysis from endometrial slices. Progesterone did not inhibit this stimulatory effect. During luteolysis OT increased (P<0.05) PGF2α in epithelial and stromal cells and PGE2 secretion in epithelial cells. In the presence of P₄ this effect of OT was reduced only in stromal cyclic cells (6 h culture). The presence of P₄ decreased the effect of OT on [Ca²⁺]i mobilisation only in stromal cells. We found that, in most conditions, P₄ did not inhibit the OT-stimulated secretion of PG in the porcine endometrium.
Źródło:
Polish Journal of Veterinary Sciences; 2010, 13, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific binding sites for progesterone and 17β-estradiol in cells of Triticum aestivum L.
Autorzy:
Janeczko, Anna
Budziszewska, Bogusława
Skoczowski, Andrzej
Dybała, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1040676.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
vernalization
progesterone
radioligand binding assay
Triticum aestivum L.
17β-estradiol
Opis:
The presence and location of specific binding sites for progesterone and 17β-estradiol in cells of wheat were estimated using radioligand binding assay. Membrane and cytosolic fractions of non-vernalized and vernalized plants were tested using tritium-labelled ligands. Specific binding of [3H]progesterone and [3H]17β-estradiol occurs in wheat cells. The binding sites are located in membranes and in the cytosol. Specific binding of [3H]17β-estradiol is higher in the membranes than in the cytosol. Specific binding of both ligands in the cytosolic fraction is higher in vernalized plants than in non-vernalized ones. The possibility of the occurrence of steroid binding proteins specific for progesterone and 17β-estradiol, putative steroid receptors for these steroids in Triticum aestivum L., is discussed.
Źródło:
Acta Biochimica Polonica; 2008, 55, 4; 707-711
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between in-line milk progesterone before and after artificial insemination and fertility outcomes in dairy cows
Autorzy:
Gavelis, A.
Juozaitis, A.
Japertienė, R.
Palubinskas, G.
Juozaitienė, V.
Žilaitis, V.
Powiązania:
https://bibliotekanauki.pl/articles/2087190.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
in-line milk progesterone
cow reproductive performance
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 2; 183-190
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preovulatory progesterone secretion terminates the duration of reproductive behavior during heat in the bitch
Autorzy:
Bladowska, K.
Barański, W.
Janowski, T.E.
Powiązania:
https://bibliotekanauki.pl/articles/2087689.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bitch
preovulatory progesterone
aglepristone treatment
reproductive behavior
estrus
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 3; 615-622
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Permeation-enhancing properties of Nepeta cataria var. citriodora dry extract
Właściwości suchego wyciągu z Nepeta cataria var. citriodora zwiększające zdolność przenikania
Autorzy:
Winnicki, A.M.
Smieszek, J.M.
Partyka, D.
Modnicki, D.
Powiązania:
https://bibliotekanauki.pl/articles/71985.pdf
Data publikacji:
2013
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
permeation-enhancing property
Nepeta cataria var.citriodora
dry extract
progesterone
lipophilic membrane
solubility
ursolic acid
oleanolic acid
Opis:
This paper presents the research on permeation enhancing properties of Nepeta cataria var. citriodora (catnip) dry extract in comparison to oleanolic acid and ursolic acid. Progesterone was chosen as a model substance for permeation test. The hydrogels made of hydroxypropylmethylcellulose with progesterone, enhancers and ethanol were applied in the study. The in vitro progesterone penetration test was based on the method proposed by Fürst, using artificial lipophilic membranes which were made of colloxylin and dodecanol. Statistical analyses showed an increase in penetration of progesterone caused by catnip dry extract in comparison to ursolic acid and blank sample. HPLC assay was applied to study the effect of enhancers on progesterone physicochemical properties. The solubility of progesterone was tested in solvent systems corresponding to liquid phases of gels. The statistical increase in progesterone solubility was observed in the presence of dry extract in comparison to the result from ursolic acid-containing sample. The partition coefficient of progesterone was evaluated by standard procedures. The statistically significant reduction of log P values for progesterone was determined in the presence of catnip dry extract.
W pracy oceniono wpływ wyciągu suchego z Nepeta cataria var. citriodora (kocimiętki cytrynowej) oraz kwasu oleanolowego i ursolowego (promotory wchłaniania) na penetrację substancji czynnej. W badaniach wykorzystano hydrożele wykonane z hydroksypropylmetylcelulozy, progesteronu (substancja modelowa), promotorów wchłaniania i etanolu. Badania in vitro penetracji progesteronu były oparte o metodę zaproponowaną przez Fürsta, wykorzystującą sztuczne lipofilowe błony wykonane z koloksyliny i dodekanolu. Analiza statystyczna wykazała zwiększoną penetrację progesteronu spowodowaną obecnością wyciągu suchego w porównaniu z kwasem ursolowym i próbą odniesienia. Metodę HPLC wykorzystano do zbadania wpływu promotorów na właściwości fizyko-chemiczne progesteronu. Rozpuszczalność progesteronu była badana w układzie rozpuszczalników odpowiadającej fazie płynnej żeli. Statystycznie istotny wzrost rozpuszczalności progesteronu zaobserwowano w obecności wyciągu suchego w porównaniu z próbą zawierającą kwas ursolowy. Współczynnik podziału określono za pomocą standartowych procedur. Statystycznie istotny spadek wartości log P progesteronu zaobserwowano w obecności wyciągu suchego z kocimiętki.
Źródło:
Herba Polonica; 2013, 59, 3
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nuclear progesterone receptor isoforms and their functions in the female reproductive tract
Autorzy:
Rekawiecki, R.
Kowalik, M.
Kotwica, J.
Powiązania:
https://bibliotekanauki.pl/articles/32231.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nuclear receptor
female
reproductive tract
progesterone
isoform
function
embryo
corpus luteum
reproductive system
endocrine gland
ovulation
ovarian follicle
hormone
cattle
animal physiology
Opis:
Progesterone (P4), which is produced by the corpus luteum (CL), creates proper conditions for the embryo implantation, its development, and ensures proper conditions for the duration of pregnancy. Besides the non-genomic activity of P4 on target cells, its main physiological effect is caused through genomic action by the progesterone nuclear receptor (PGR). This nuclear progesterone receptor occurs in two specific isoforms, PGRA and PGRB. PGRA isoform acts as an inhibitor of transcriptional action of PGRB. The inactive receptor is connected with chaperone proteins and attachment of P4 causes disconnection of chaperones and unveiling of DNA binding domain (DBD). After receptor dimerization in the cells’ nucleus and interaction with hormone response element (HRE), the receptor coactivators are connected and transcription is initiated. The ratio of these isoforms changes during the estrous cycle and reflects the different levels of P4 effect on the reproductive system. Both isoforms, PGRA and PGRB, also show a different response to the P4 receptor antagonist activity. Connection of the antagonist to PGRA can block PGRB, but acting through the PGRB isoform, P4 receptor antagonist may undergo conversion to a strongly receptor agonist. A third isoform, PGRC, has also been revealed. This isoform is the shortest and does not have transcriptional activity. Alternative splicing and insertion of additional exons may lead to the formation of different PGR isoforms. This paper summarizes the available data on the progesterone receptor isoforms and its regulatory action within the female reproductive system.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niewydolność cieśniowo-szyjkowa: diagnostyka i leczenie
Cervical insufficiency: diagnostics and treatment
Autorzy:
Milanowska-Koloch, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/437684.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
poród przedwczesny
szyjka macicy
pessarium
szew szyjkowy
progesteron,
ultrasonografia dopochwowa
preterm birth
uterine cervix
pessary
cervical
cerclage
progesterone
transvaginal ultrasound
Opis:
WHO podaje, że co roku przedwcześnie rodzi się ok. 15 mln dzieci, co stanowi 5–18% wszystkich porodów, w zależności od kraju. Przyczyną ok. 15% poronień nawykowych i porodów przedwczesnych jest niewydolność cieśniowo-szyjkowa. Definiujemy ją jako bezbolesne rozwieranie i skracanie się szyjki macicy w II trymestrze lub wczesnym III trymestrze, któremu nie towarzyszą skurcze, krwawienie z dróg rodnych czy pęknięcie pęcherza płodowego. W artykule przedstawiono przegląd metod diagnostyki i leczenia niewydolności cieśniowo-szyjkowej. Diagnostyka polega głównie na wywiadzie położniczym, badaniu ginekologicznym i badaniu ultrasonograficznym, leczenie natomiast na założeniu szwu szyjkowego, pessarium kołnierzowego lub stosowaniu progesteronu. Obecnie poszukuje się nowych markerów ryzyka wystąpienia porodu przedwczesnego.
WHO reports that every year approximately 15 million children are born prematurely, which makes up 5-18% of all births, depending on a country. The reason for approx. 15% of recurrent miscarriages and premature births is the cervical insufficiency. We define it as painless dilation and effacement of the uterine cervix in the second trimester or early third trimester, which are not accompanied by cramps, vaginal bleeding or rupture of the amniotic sac. The article presents an overview of the methods of diagnostics and cervical insufficiency treatment. The diagnostics mainly involves a maternity interview, gynecological examination and ultrasonography, while the treatment relies on applying the cervical cerclage, pessary or progesterone. Currently, new markers of risk are being looked for a preterm delivery.
Źródło:
Medical Review; 2014, 4; 374-380
2450-6761
Pojawia się w:
Medical Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local effect of progesterone infusion into ovarian artery on activin A and inhibin alpha-subunit secretion during the middle luteal phase in gilts
Autorzy:
Wasowska, B
Stefanczyk-Krzymowska, S.
Powiązania:
https://bibliotekanauki.pl/articles/30684.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dimeric glycoprotein
activin
inhibin
growth factor-beta
progesterone infusion
ovarian artery
alpha-subunit
secretion
exogenous progesterone
local feedback
gilt
middle luteal phase
Opis:
The present study was undertaken to elucidate whether an increased, but physiological, amount of progesterone (P4) supplied to the porcine corpus luteum affects luteal secretion of activin A and inhibin a-subunit (Inha) in freely moving gilts. On day 9 of the estrous cycle (EC), both ovarian arteries and both ovarian veins of gilts (n=5) were cannulated. Progesterone was infused into the right ovarian arteries in gilts on days 10, 11 and 12 of the EC at a rate adequate to its physiological retrograde transfer found during the middle luteal phase of the EC. The P4 infusion rate was 0.62 μg/min (day 10), 2x0.62 μg/min (day 11) and 3x0.62 μg/min (day 12). The left ovarian arteries were infused with saline (control). Blood samples were collected from both ovarian veins on days 10-12 of the EC before and after P4 or saline infusion. The mean plasma activin A level in the ovarian vein ipsilateral to the P4-infused ovary was higher (PcO.OOOl) on days 10-12 of the EC than this found in the contralateral ovarian vein. The level of activin A in the ovarian vein ipsilataral to the infusion of P4 was higher on days 11 (PcO.Ol) and 12 (P<0.0001) and tended to be higher (P<0.07) on day 10 of the EC than this in contralateral ovarian vein. The level of Inha in the ovarian vein ipsilateral to the P4-infused ovary on days 10-12 of the EC was not significantly different (P>0.05) than this found in the contralateral ovarian vein. The results of the present study indicate that a local elevation of P4 concentration in blood supplying the ovary during the middle luteal phase of the porcine EC affects ovarian secretion of activin A. The effect of P4 on the secretion of activin A suggested the existence of a short regulatory loop of a positive feedback between P4 being retrogradely transferred into the ovary and the secretion of this peptide.
Źródło:
Polish Journal of Veterinary Sciences; 2010, 13, 1; 97-104
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of puerperal metritis on the first ovulation after calving in dairy cows
Autorzy:
Juodžentis, V.
Šiugždaitė, J.
Palubinskas, G.
Juodžentė, D.
Rekešiūtė, A.
Žilinskas, H.
Powiązania:
https://bibliotekanauki.pl/articles/2087266.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
corpus luteum
dominant follicle
ovulation
metritis
progesterone
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 4; 619-626
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hormonal changes in dairy cows during periparturient period
Zmiany hormonalne u krów mlecznych w okresie okołoporodowym
Autorzy:
Kurpińska, A.
Skrzypczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/2615881.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
dairy cow
hormonal change
periparturient period
prostaglandin F2 alpha
prolactin
human growth hormone
oxytocin
progesterone
estrogen
androgen
glycoprotein
gonadotrophin releasing hormone
luteinizing hormone
follicle stimulating hormone
thyroid hormone
cortisol
insulin
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2019, 18, 4; 13-21
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of tocolytic drugs (isoxsuprine hydrochloride) during the implantation period in pregnant sheep
Autorzy:
Akbulut, N.K.
Kal, Y.
Powiązania:
https://bibliotekanauki.pl/articles/16628474.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
isoxsuprine hydrochloride
reproductive parameters
progesterone
cortisol
calcium
Opis:
In this study, the effects of isoxsuprine hydrochloride applied 14 and 15 days after insemination in Anatolian Merino Sheep on lamb yield and some blood parameters were investigated. The research was conducted during the breeding season and 54 ewes inseminated on the same day were used. The ewes were assigned to three groups. Group I: For the placebo effect, physiological saline was injected on the 14th day into half of the control group and on the 15th day into the other half after insemination (n=18). Group II: Tocolytic drug was injected on the 14th day after insemination (n=18). Grop III: Tocolytic drug was injected on the 15th day after insemination (n=18). As the tocolytic drug, isoxsuprine hydrochloride (HCl) 3 ml (Utelax, Sanovel, Türki̇ye) was used intramuscularly. The number of pregnant and viviparous ewes, single and multiple birth ewes, lambs per viviparous ewes were determined as reproductive parameters. Blood progesterone, cortisol and calcium concentration were determined. As a result, it was determined that the single application of isoxsuprine hydrochloride (3 ml) in the implantation period did not have a positive or negative effect on reproductive parameters, and did not change the blood progesterone, calcium and cortisol concentration in ewes.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 4; 557-560
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of subcutaneous melatonin implants and short-term intravaginal progestagen treatments on estrus induction and fertility of Kivircik ewes on seasonal anestrus
Autorzy:
Yilmazer, C.
Cevik, M.
Kocyigit, A.
Powiązania:
https://bibliotekanauki.pl/articles/2087723.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ewes
fertility
melatonin
short-term progesterone
seasonality
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 2; 353-359
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of progesterone-releasing intravaginal device on reproductive performance of cows with cystic ovarian follicles after puerperium
Autorzy:
Rudowska, M.
Barański, W.
Zduńczyk, S.
Tobolski, D.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2087479.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cows
cystic ovarian follicles
progesterone insert
fertility
Źródło:
Polish Journal of Veterinary Sciences; 2019, 3; 489-494
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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