Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "oxytocin" wg kryterium: Wszystkie pola


Tytuł:
Clinical observations on the course of oxytocin-or prostaglandin E2/oxytocin-induced parturition in mares
Autorzy:
Witkowski, M.
Pawlowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/2087941.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The objective of this study was to compare the course of parturitions induced with sole oxytocin with those induced with the combination of intracervical prostaglandin E2 jelly and oxytocin. For this purpose 13 mares in advanced pregnancy were allocated to the groups pretreated with either intracervical PGE2 (experimental group) or saline (control group) two hours before intravenous oxytocin (5 IU) administration. The mares were compared with respect to cervical dilation diameter (CDD) 20 min. after oxytocin injection. Time intervals from the first oxytocin dose to: the first external signs of parturition, the chorioallantois rupture, the delivery of a foal and time interval from the delivery of a foal to the placenta separation were measured. Cervical dilatation diameter as well as proportion of mares with cervical dilatation > 20 cm were significantly higher in the group of PGE2 treated mares comparing with control group (p = 0.0115 and p = 0.0490, respectively). All time intervals measured were statistically insignificant for both groups of mares, however time intervals from the first oxytocin dose to the first external signs of parturition, to the allantochorion rupture and to the delivery of a foal, were very close to the significance level (α = 0.05). To conclude, PGE/oxytocin combination has positive influence on the preparation of the uterine cervix to parturition. Moreover, it seems that PGE2 pretreatment reduced total oxytocin dose for successful parturition induction and shortened time elapsing between the first oxytocin dose and the delivery of a foal what is crucial for foal’s safety.
Źródło:
Polish Journal of Veterinary Sciences; 2014, 17, 2; 347-351
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thyrotropin-releasing hormone [TRH] modifies oxytocin release from the hypothalamo-neurohypophysial system in salt-loaded rats
Autorzy:
Ciosek, J
Stempniak, B.
Powiązania:
https://bibliotekanauki.pl/articles/70932.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
thyrotrophin releasing hormone
hypertonic saline
blood plasma
neurohypophyseal oxytocin
oxytocin
neurotransmitter
rat
hypothalamo-neurohypophyseal system
central nervous system
neurohormone
antibody
Źródło:
Journal of Physiology and Pharmacology; 1995, 46, 2
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxytocin analogues with amide groups substituted by tetrazole groups in position 4, 5 or 9
Autorzy:
Manturewicz, Michał
Grzonka, Zbigniew
Borovičková, Lenka
Slaninová, Jiřina
Powiązania:
https://bibliotekanauki.pl/articles/1040873.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
oxytocin analogues
SAR
tetrazole derivatives
Opis:
Eleven oxytocin analogues substituted in position 4, 5 or 9 by tetrazole analogues of amino acids were prepared using solid-phase peptide synthesis method and tested for rat uterotonic in vitro and pressor activities, as well as for their affinity to human oxytocin receptor. The tetrazolic group has been used as a bioisosteric substitution of carboxylic, ester or amide groups in structure-activity relationship studies of biologically active compounds. Replacement of the amide groups of Gln4 and Asn5 in oxytocin by tetrazole analogues of aspartic, glutamic and α-aminoadipic acids containing the tetrazole moiety in the side chains leads to analogues with decreased biological activities. Oxytocin analogues in which the glycine amide residue in position 9 was substituted by tetrazole analogues of glycine had diminished activities as well. The analysis of differences in rat uterotonic activity and in the affinity to human oxytocin receptors of analogues containing either an acidic 5-substituted tetrazolic group or a neutral 1,5- or 2,5-tetrazole nucleus makes it possible to draw some new conclusions concerning the role of the amide group of amino acids in positions 4, 5 and 9 of oxytocin for its activity. The data suggest that the interaction of the side chain of Gln4 with the oxytocin receptor is influenced mainly by electronic effects and the hydrogen bonding capacity of the amide group. Steric effects of the side chain are minor. Substitution of Asn5 by its tetrazole derivative gave an analogue of very low activity. The result suggests that in the interaction between the amide group of Asn5 and the binding sites of oxytocic receptor hydrogen bonds are of less importance than the spatial requirements for this group.
Źródło:
Acta Biochimica Polonica; 2007, 54, 4; 805-811
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of adrenoreceptors in the regulation of oxytocin and vasopressin release after superior cervical ganglionectomy
Autorzy:
Lipinska, S.
Powiązania:
https://bibliotekanauki.pl/articles/70439.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
vasopressin
adrenoceptor
dialysis
venous blood
neuron
neurohormone
rat
oxytocin regulation
superior cervical ganglionectomy
Źródło:
Journal of Physiology and Pharmacology; 2000, 51, 1
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of modification at position 2 on the side-chain conformation in oxytocin analogs
Autorzy:
Śmiech, Bogusław
Kaźmierkiewicz, Rajmund
Lammek, Bernard
Powiązania:
https://bibliotekanauki.pl/articles/1041276.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
oxytocin analogs
torsional angle distribution
EDMC
Opis:
The nonapeptide oxytocin (OT) is used in medicine to help begin and/or continue childbirth. Its analogs can be also used to control bleeding following fetus delivery. The main function of oxytocin is to stimulate contraction of uterus smooth muscle and the smooth muscle of mammary glands, thus regulating lactation. This paper describes theoretical simulations of the distribution of the torsional angles χ1 in the non-standard methylated phenylalanine residues of three oxytocin analogs: [(Phe)2o-Me]OT, [(Phe)2m-Me]OT, [(Phe)2p-Me]OT. The conformations of the oxytocin analogs were studied both in vacuum and in solution. We found some correlations between the biological activity of the considered peptides and the side-chain conformations of amino-acid residues 2 and 8.
Źródło:
Acta Biochimica Polonica; 2006, 53, 1; 113-120
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular modelling study of the role of cholesterol in the stimulation of the oxytocin receptor.
Autorzy:
Politowska, Ewa
Kaźmierkiewicz, Rajmund
Wiegand, Volker
Fahrenholz, Falk
Ciarkowski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/1044168.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cholesterol
AutoDock 2.4
cholecystokinin receptor type β
oxytocin receptor
GPCR
sterols
Opis:
Cholesterol, an integral component of membranes in Eucaryota, is a modifier of membrane properties. In vivo studies have demonstrated that cholesterol can also modulate activities of some G protein-coupled receptors (GPCRs), which are integral membrane proteins. This can result either from an effect of cholesterol on the membrane fluidity or from specific interactions of the membrane cholesterol with the receptor, as recently demonstrated for the cholecystokinin type β (CCKRβ) or the oxytocin receptor (OTR). Using molecular modelling, we studied conformational preferences of cholesterol and several of its analogues. Subsequently, we simulated the distributions of their preferred conformations around the surface of OTR, CCKRβ and a chimeric oxytocin/cholecystokinin receptor. Consequently, we suggest residues on the surface of OTR which are potentially significant in the OTR/cholesterol interaction.
Źródło:
Acta Biochimica Polonica; 2001, 48, 1; 83-93
0001-527X
Pojawia się w:
Acta Biochimica Polonica
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:
The effect of oxytocin on hCG action in phosphoinositide turnover in porcine myometrial smooth muscle cells
Autorzy:
Kisielewska, J
Ziecik, A.J.
Powiązania:
https://bibliotekanauki.pl/articles/69570.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
pig
endometrium
inositol phosphate
cell
mice
myometrium
human myometrium cell
rat
porcine uterus
mouse
phosphoinositide turnover
porcine endometrium
oxytocin
bovine endometrium
smooth muscle
rabbit
hormone
Źródło:
Journal of Physiology and Pharmacology; 1995, 46, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short review on the aggressive behaviour: genetical, biological aspects and oxytocin relevance
Autorzy:
Padurariu, M.
Prepelita, R.
Ciobica, A.
Dobrin, R.
Timofte, D.
Stefanescu, C.
Chirita, R.
Powiązania:
https://bibliotekanauki.pl/articles/11903.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
In this mini-review we were interested in describing the main genetic, biological and mechanistic aspects of the aggressive behaviour in human patients and animal models. It seems that violent behaviour and impulsive traits present a multifactorial substrate, which is determined by genetic and non-genetic factors. Thus, aggressivity is regulated by brain regions such as the amygdala, which controls neural circuits for triggering defensive, aggressive or avoidant behaviour. Moreover, other brain structures such as the anterior cingulate cortex and prefrontal cortex regions could modulate circuits involved in aggression. Regarding the genetic aspects, we could mention the mutations in the monoamine oxidase or the polymorphisms of the genes involved in the metabolism of serotonin, such as tryptophan hydroxylase. Also, besides the low levels of serotonin metabolites, which seem to be associated with impulsive and aggressive traits, there are good evidences that deficiencies in glutamate transmission, as well as testosterone, vasopressin, hypochloesterolemia or oxytocin modifications could be related to the aggressive behaviour. Regarding oxytocin we present here in the last chapter the controversial results from the current literature regarding the various effects exhibited by oxytocin administration on the aggressive behavior, considering the increased interest in understanding the role of oxytocin on the main neuropsychiatric disorders.
Źródło:
International Letters of Natural Sciences; 2016, 52
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of cortisol on neurophysin I/oxytocin and peptidyl glycine-α-amidating mono-oxygenase mRNA expression in bovine luteal and granulosa cells
Autorzy:
Ziolkowska, A.
Mlynarczuk, J.
Kotwica, J.
Powiązania:
https://bibliotekanauki.pl/articles/30087.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Cortisol stimulates the synthesis and secretion of oxytocin (OT) from bovine granulosa and luteal cells, but the molecular mechanisms of cortisol action remain unknown. In this study, granulosa cells or luteal cells from days 1-5 and 11-15 of the oestrous cycle were incubated for 4 or 8 h with cortisol (1x10⁻⁵, 1x10⁻⁷ M). After testing cell viability and hormone secretion (OT, progesterone, estradiol), we studied the effect of cortisol on mRNA expression for precursor of OT (NP-I/OT) and peptidyl glycine-α-amidating mono-oxygenase (PGA). The influence of RU 486 (1x10⁻⁵ M), a progesterone receptor blocker and inhibitor of the glucocorticosteroid receptor (GR), on the expression for both genes was tested. Cortisol increased the mRNA expression for NP-I/OT and PGA in granulosa cells and stimulated the expression for NP-I/OT mRNA in luteal cells obtained from days 1-5 and days 11-15 of the oestrous cycle. Expression for PGA mRNA was increased only in luteal cells from days 11-15 of the oestrous cycle. In addition, RU 486 blocked the cortisol-stimulated mRNA expression for NP-I/OT and PGA in both types of cells. These data suggest that cortisol affects OT synthesis and secretion in bovine ovarian cells, by acting on the expression of key genes, that may impair ovary function.
Źródło:
Polish Journal of Veterinary Sciences; 2013, 16, 2
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neurobiologiczne znaczenie oksytocyny u ludzi i zwierząt
Neurobiology of oxytocin in humans and animals
Autorzy:
Kania, B.F.
Wronska, D.
Blachut, M.
Powiązania:
https://bibliotekanauki.pl/articles/860060.pdf
Data publikacji:
2014
Wydawca:
Krajowa Izba Lekarsko-Weterynaryjna
Tematy:
czlowiek
zwierzeta
neurobiologia
hormony podwzgorza
oksytocyna
funkcje
Źródło:
Życie Weterynaryjne; 2014, 89, 07
0137-6810
Pojawia się w:
Życie Weterynaryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Karmienie piersią jako czynnik chroniący dzieci przed krzywdzeniem
Breastfeeding – a protective intervention for child maltreatment
Autorzy:
Baranowska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/499280.pdf
Data publikacji:
2016
Wydawca:
Fundacja Dajemy Dzieciom Siłę
Tematy:
Karmienie piersią, oksytocyna, przemoc wobec dziecka, przywiązanie
breastfeeding, oxytocin, child maltreatment, attachment
Opis:
Przemoc wyrządza ogromne szkody, szczególnie gdy dotyczy okresu wczesnodziecięcego.Noworodek czy niemowlę zależne od matki, posługujące się płaczem jako główną formą komunikacji, staje się często obiektem jej agresji. Naturalnym elementem tworzenia więzi w diadzie matka–dziecko jest karmienie piersią. Przynosząc ukojenie matce, łagodząc jej reakcje na stres, karmienie naturalne zaspakaja podstawowe potrzeby dziecka i tworzy mu bezpieczną przestrzeń do rozwoju zarówno fizycznego, jak i psychicznego. Karmienie piersią stanowi element wzmacniający kompetencje matki i jest czynnikiem chroniącym dziecko przed krzywdzeniem rodzicielskim.
Violence is extremely damaging, especially early. A newborn baby or mother, using crying as a form, communicates with other things. The natural element of bonding in a mother diad-baby is breastfeeding. Bringing a mother’s relief, soothing her stress response, physical feeding satisfies the basic physical and mental needs. Breastfeeding is an element that strengthens the competence of the mother and is a factor in protecting the child from parental harm.
Źródło:
Dziecko krzywdzone. Teoria, badania, praktyka; 2016, 15, 4; 44-64
1644-6526
Pojawia się w:
Dziecko krzywdzone. Teoria, badania, praktyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular docking-based test for affinities of two ligands toward vasopressin and oxytocin receptors.
Autorzy:
Ślusarz, Rafał
Kaźmierkiewicz, Rajmund
Giełdoń, Artur
Lammek, Bernard
Ciarkowski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/1044173.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
simulated annealing
bioligand docking
GPCR receptor/bioligand interaction
molecular dynamics
Opis:
Molecular docking simulations are now fast developing area of research. In this work we describe an effective procedure of preparation of the receptor-ligand complexes. The amino-acid residues involved in ligand binding were identified and described.
Źródło:
Acta Biochimica Polonica; 2001, 48, 1; 131-135
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies