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https://www.readbyqxmd.com/read/27226312/polyamine-mediated-effects-of-prolactin-dictate-emergence-from-mink-obligate-embryonic-diapause
#1
Jane C Fenelon, Arnab Banerjee, Pavine Lefèvre, Fanélie Gratian, Bruce D Murphy
Embryonic diapause is an evolutionary strategy to ensure that offspring are born when maternal and environmental conditions are optimal for survival. In many species of carnivores, obligate embryonic diapause occurs in every gestation. Reciprocal embryo transplant studies indicate that embryo arrest during diapause is conferred by uterine conditions and is due to a lack of specific factors necessary for continued development. In previous studies, global gene expression analysis revealed reduced uterine expression during diapause of a cluster of genes in the mink that regulate the abundance of polyamines, including ornithine decarboxylase 1 (ODC1)...
July 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/26762583/investigation-on-toxicity-and-teratogenicity-in-rats-of-a-retinoid-polyamine-conjugate-with-potent-anti-inflammatory-properties
#2
Theodoros Petridis, Dimitra Giannakopoulou, Vassiliki Stamatopoulou, Katerina Grafanaki, Christos G Kostopoulos, Helen Papadaki, Christina J Malavaki, Nikos K Karamanos, Stathianna Douroumi, Dionysios Papachristou, George E Magoulas, Dionissios Papaioannou, Denis Drainas
Previous studies have shown that N(1),N(12)-bis(all-trans-retinoyl)spermine (RASP), a retinoid analog, inhibits RNase P activity and angiogenesis in the chicken embryo chorioallantoic membrane, demonstrates anti-tumor activity on prostate cancer cells, and acts as anti-inflammatory agent, being more effective and less toxic than all-trans retinoic acid. In an attempt to further characterize the biological profile of RASP, we tested its effects on organ toxicity and teratogenicity by daily oral gavage of RASP at a level of 50 mg/Kg of body weight in two generations of rats...
February 2016: Birth Defects Research. Part B, Developmental and Reproductive Toxicology
https://www.readbyqxmd.com/read/25557050/the-many-faces-of-interferon-tau
#3
REVIEW
Fuller W Bazer, Wei Ying, Xiaoqiu Wang, Kathrin A Dunlap, Beiyan Zhou, Greg A Johnson, Guoyao Wu
Interferon tau (IFNT) was discovered as the pregnancy recognition signal in ruminants, but is now known to have a plethora of physiological functions in the mammalian uterus. The mammalian uterus includes, from the outer surface to the lumen, the serosa, myometrium and endometrium. The endometrium consists of the luminal, superficial glandular, and glandular epithelia, each with a unique phenotype, stromal cells, vascular elements, nerves and immune cells. The uterine epithelia secrete or selectively transport molecules into the uterine lumen that are collectively known as histotroph...
March 2015: Amino Acids
https://www.readbyqxmd.com/read/25023682/embryonic-diapause-development-on-hold
#4
REVIEW
Jane C Fenelon, Arnab Banerjee, Bruce D Murphy
Embryonic diapause, the temporary suspension of development of the embryo, is a fascinating reproductive strategy that has been frequently exploited across the animal kingdom. It is characterized by an arrest in development that occurs at the blastocyst stage in over 130 species of mammals. Its presumed function is to uncouple mating from parturition, to ensure that both occur at the most propitious moment for survival of the species. Diapause can be facultative, i.e. induced by physiological conditions, or obligate, i...
2014: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/24158948/falsiporphyromonas-endometrii-gen-nov-sp-nov-isolated-from-the-post-partum-bovine-uterus-and-emended-description-of-the-genus-porphyromonas-shah-and-collins-1988
#5
K Wagener, M Drillich, S Baumgardt, P Kämpfer, H-J Busse, M Ehling-Schulz
Two black-pigmented, anaerobic bacterial strains, designated LMM 40(T) and LMM 41, were isolated from the bovine post-partum endometrium of two Holstein cows. The 16S rRNA gene sequences of the two strains were identical and showed the highest similarity to the 16S rRNA gene sequence of the type strain of Porphyromonas crevioricanis (90.2%) but only 85.1% 16S rRNA gene sequence similarity to the type strain of the type species of the genus Porphyromonas, Porphyromonas asaccharolytica. The major fatty acid profiles of the two strains were similar to those of species of the genus Porphyromonas, containing iso-C(15 : 0) as the major component and moderate amounts of anteiso-C(15 : 0), iso-C(13 : 0), C(15 : 0) and C(16 : 0)...
February 2014: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/23816446/characterization-and-immunolocalization-of-mutated-ornithine-decarboxylase-antizyme-from-angiostrongylus-cantonensis
#6
Jing Chen, Qian Liu, Xiao Yang, Xiansheng Wu, Dongjing Zhang, Ai He, Ximei Zhan
Ornithine decarboxylase antizyme (OAZ), a prominent regulator of cell proliferation, DNA/RNA transformation and tumorigenesis, can bind to ornithine decarboxylase (ODC) and facilitate its degradation. Expression of OAZ requires a unique ribosomal frame shift that is regulated by levels of polyamine in the cell. In this study, we cloned an OAZ gene with the +1 ribosomal frame-shift from a fourth-stage larvae cDNA library of Angiostrongylus cantonensis. We removed one nucleotide to express the gene without polyamine...
August 2013: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/23732998/impacts-of-arginine-nutrition-on-embryonic-and-fetal-development-in-mammals
#7
Guoyao Wu, Fuller W Bazer, M Carey Satterfield, Xilong Li, Xiaoqiu Wang, Gregory A Johnson, Robert C Burghardt, Zhaolai Dai, Junjun Wang, Zhenlong Wu
Embryonic loss and intrauterine growth restriction (IUGR) are significant problems in humans and other animals. Results from studies involving pigs and sheep have indicated that limited uterine capacity and placental insufficiency are major factors contributing to suboptimal reproduction in mammals. Our discovery of the unusual abundance of the arginine family of amino acids in porcine and ovine allantoic fluids during early gestation led to the novel hypothesis that arginine plays an important role in conceptus (embryo and extra-embryonic membranes) development...
August 2013: Amino Acids
https://www.readbyqxmd.com/read/23474393/filarial-parasites-possess-an-antizyme-but-lack-a-functional-ornithine-decarboxylase
#8
Marc-André Kurosinski, Kai Lüersen, Dieudonne Ndjonka, Abuelhassan Elshazly Younis, Norbert W Brattig, Eva Liebau
In eukaryotes, the key player in polyamine metabolism is the ornithine decarboxylase (ODC) that catalyses the first and rate limiting step in cellular polyamine synthesis. The half life of ODC is strictly regulated by the antizyme (AZ), which promotes its degradation. Older reports on the polyamine situation in filarial parasites indicate a lack of ornithine decarboxylation activity and an increased uptake of polyamines. Our in silico analysis of the Brugia malayi genome revealed only an ODC-like protein that lacks essential residues...
June 2013: Acta Tropica
https://www.readbyqxmd.com/read/23279480/embryonic-diapause-advances-in-understanding-the-enigma-of-seasonal-delayed-implantation
#9
B D Murphy
Embryonic diapause is an evolutionary strategy by which a reversible arrest in embryo development occurs. In its two forms, facultative and obligate, it assures that offspring are born when optimal maternal and environmental conditions are present to ensure maximal survival. We have explored obligate delayed implantation in the mink (Neovison vison) over four decades: first by evaluation of the environmental regulation, then by determination of the pituitary factors that maintain diapause and provoke implantation followed by exploration of the ovarian contribution to the process...
December 2012: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/23081893/arginine-enhances-embryo-implantation-in-rats-through-pi3k-pkb-mtor-no-signaling-pathway-during-early-pregnancy
#10
Xiangfang Zeng, Xiangbing Mao, Zhimin Huang, Fenglai Wang, Guoyao Wu, Shiyan Qiao
Our previous study has demonstrated that dietary arginine supplementation during early pregnancy enhanced embryo implantation in rats. However, the mechanism was not clear. The objective of this study was to determine the mechanism that arginine enhanced embryo implantation during early pregnancy. Rats were fed the basal diets supplemented with 1.3% (wt:wt) L-arginine-HCl or 2.2% (wt:wt) L-alanine (isonitrogenous control) once pregnancy. On d4 of pregnancy, rats were given intrauterine injection of L-NG-nitro arginine methyl ester (L-NAME, nitric oxide synthase inhibitor), α-difluoromethylornithine (DFMO, polyamine synthesis inhibitor), wortmannin (PI3K inhibitor), or rapamycin (mTOR inhibitor)...
January 2013: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/22013999/immunohistochemical-and-functional-studies-on-calcium-sensing-receptors-in-rat-uterine-smooth-muscle
#11
COMPARATIVE STUDY
Marc J Pistilli, James J Petrik, Alison C Holloway, Denis J Crankshaw
1. Activation of calcium-sensing receptors (CaS) leads to relaxation of vascular smooth muscle. However, the role of CaS in uterine smooth muscle is unknown. Therefore the aim of the present study was to investigate the expression and function of CaS in the uterus. 2. The expression of CaS in the oestrogen-dominated rat uterus was investigated using immunohistochemistry. The effects of putative CaS ligands on oxytocin-induced contractions of longitudinally orientated uterine strips from oestrogen-dominated rats were determined at reduced extracellular Ca²⁺ concentrations using conventional organ bath techniques...
January 2012: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/21907263/mechanistic-mammalian-target-of-rapamycin-mtor-cell-signaling-effects-of-select-nutrients-and-secreted-phosphoprotein-1-on-development-of-mammalian-conceptuses
#12
REVIEW
Fuller W Bazer, Gwonhwa Song, Jinyoung Kim, David W Erikson, Greg A Johnson, Robert C Burghardt, Haijun Gao, M Carey Satterfield, Thomas E Spencer, Guoyao Wu
Morphological differentiation of uterine glands in mammals is a postnatal event vulnerable to adverse effects of endocrine disruptors. Exposure of ewe lambs to a progestin from birth to postnatal day 56 prevents development of uterine glands and, as adults, the ewes are unable to exhibit estrous cycles or maintain pregnancy. Uterine epithelia secrete proteins and transport nutrients into the uterine lumen necessary for conceptus development, pregnancy recognition signaling and implantation, including arginine and secreted phosphoprotein 1 (SPP1)...
May 6, 2012: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/21865556/uterine-histotroph-and-conceptus-development-select-nutrients-and-secreted-phosphoprotein-1-affect-mechanistic-target-of-rapamycin-cell-signaling-in-ewes
#13
REVIEW
Fuller W Bazer, Guoyao Wu, Greg A Johnson, Jinyoung Kim, Gwonhwa Song
Interferon tau (IFNT), the pregnancy recognition signal in ruminants, abrogates the uterine luteolytic mechanism to ensure maintenance of function for the corpora lutea to produce progesterone (P4). IFNT also suppresses expression of classical IFN-stimulated genes by uterine lumenal epithelium (LE) and superficial glandular (sGE) epithelium but, acting in concert with progesterone, affects expression of a multitude of genes critical to growth and development of the conceptus. The LE and sGE secrete proteins and transport nutrients into the uterine lumen necessary for conceptus development, pregnancy recognition signaling, and implantation...
December 2011: Biology of Reproduction
https://www.readbyqxmd.com/read/21791568/polyamines-on-the-reproductive-landscape
#14
REVIEW
Pavine L C Lefèvre, Marie-France Palin, Bruce D Murphy
The polyamines are ubiquitous polycationic compounds. Over the past 40 yr, investigation has shown that some of these, namely spermine, spermidine, and putrescine, are essential to male and female reproductive processes and to embryo/fetal development. Indeed, their absence is characterized by infertility and arrest in embryogenesis. Mammals synthesize polyamines de novo from amino acids or import these compounds from the diet. Information collected recently has shown that polyamines are essential regulators of cell growth and gene expression, and they have been implicated in both mitosis and meiosis...
October 2011: Endocrine Reviews
https://www.readbyqxmd.com/read/21303959/polyamines-are-implicated-in-the-emergence-of-the-embryo-from-obligate-diapause
#15
Pavine L C Lefèvre, Marie-France Palin, Gary Chen, Gustavo Turecki, Bruce D Murphy
Embryonic diapause is a poorly understood phenomenon of reversible arrest of embryo development prior to implantation. In many carnivores, such as the mink (Neovison vison), obligate diapause characterizes each gestation. Embryo reactivation is controlled by the uterus by mechanisms that remain elusive. Because polyamines are essential regulators of cell proliferation and growth, it was hypothesized that they trigger embryo reactivation. To test this, mated mink females were treated with α-difluoromethylornithine, an inhibitor of ornithine decarboxylase 1, the rate-limiting enzyme in polyamine biosynthesis, or saline as a control during the first 5 d of reactivation...
April 2011: Endocrinology
https://www.readbyqxmd.com/read/21293034/select-nutrients-in-the-ovine-uterine-lumen-ix-differential-effects-of-arginine-leucine-glutamine-and-glucose-on-interferon-tau-ornithine-decarboxylase-and-nitric-oxide-synthase-in-the-ovine-conceptus
#16
Jinyoung Kim, Robert C Burghardt, Guoyao Wu, Greg A Johnson, Thomas E Spencer, Fuller W Bazer
Nutrients are primary requirements for development of conceptuses (embryo and extraembryonic membranes), including protein synthesis. We have shown that arginine (Arg), leucine (Leu), and glucose stimulate protein synthesis through phosphorylation of MTOR signaling molecules, thereby increasing proliferation of ovine trophectoderm cells. This study determined whether Arg, Leu, glutamine (Gln), and glucose influence gene expression and protein synthesis in explant cultures of ovine conceptuses recovered from ewes on Day 16 of pregnancy...
June 2011: Biology of Reproduction
https://www.readbyqxmd.com/read/20844281/select-nutrients-in-the-ovine-uterine-lumen-viii-arginine-stimulates-proliferation-of-ovine-trophectoderm-cells-through-mtor-rps6k-rps6-signaling-cascade-and-synthesis-of-nitric-oxide-and-polyamines
#17
Jin-Young Kim, Robert C Burghardt, Guoyao Wu, Greg A Johnson, Thomas E Spencer, Fuller W Bazer
During the peri-implantation period in sheep, L-arginine (L-Arg) in the uterine lumen is an essential substrate for the synthesis of nitric oxide (NO), by nitric oxide synthase (NOS), and polyamines, via arginase and ornithine decarboxylase, that are required for survival and development of ovine conceptuses (embryo and its extraembryonic membranes). L-Arginine can stimulate hypertrophy, hyperplasia, and differentiation of the ovine conceptus trophectoderm; however, the responsible signal transduction cascade has not been determined...
January 2011: Biology of Reproduction
https://www.readbyqxmd.com/read/19893092/effects-of-protamine-sulphate-on-spontaneous-and-calcium-induced-contractile-activity-in-the-rat-uterus-are-potassium-channels-mediated
#18
Zorana Orescanin-Dusić, Slobodan Milovanović, Ratko Radojicić, Aleksandra Nikolić-Kokić, Isabella Appiah, Marija Slavić, Nedo Cutura, Stevan Trbojević, Mihajlo Spasić, Dusko Blagojević
Protamine sulphate (PS) effect on spontaneous and calcium-induced rhythmic contractions of isolated virgin rat uteri was studied. PS caused dose-dependent relaxation of both types of contractions (two-way ANOVA, significant dose effects). Pretreatment with NG-nitro-L-arginine methyl ester (L-NAME; 10(-5) mol/l), methylene blue (MB; 0.9 x 10(-6) mol/l) or propranolol (1.7 x 10(-5) mol/l) enhanced PS-mediated uterine muscle relaxation of spontaneous contractions. Dosedependent relaxation of spontaneous active isolated rat uterus with PS was lower in uteri pretreated with single dose of tetraethylammonium (TEA; 6 x 10(-3) mol/l), glibenclamide (2 x 10(-6) mol/l) and 4-aminopyridine (4-AP; 10(-3) mol/l)...
2009: General Physiology and Biophysics
https://www.readbyqxmd.com/read/19246319/select-nutrients-in-the-ovine-uterine-lumen-v-nitric-oxide-synthase-gtp-cyclohydrolase-and-ornithine-decarboxylase-in-ovine-uteri-and-peri-implantation-conceptuses
#19
RANDOMIZED CONTROLLED TRIAL
Haijun Gao, Guoyao Wu, Thomas E Spencer, Greg A Johnson, Fuller W Bazer
Nitric oxide (NO) and polyamines are critical for implantation and development of conceptuses (embryo and extraembryonic membranes), but mechanisms regulating their biosynthesis in uteri and conceptuses are largely unknown. This study determined the effects of the estrous cycle, pregnancy, progesterone, and interferon tau (IFNT) on expression of NO synthases (NOS1, NOS2, and NOS3), guanosine triphosphate (GTP) cyclohydrolase (GCH1, the key enzyme in de novo synthesis of tetrahydrobiopterin, a cofactor for NO production), and ornithine decarboxylase (ODC1) in uterine endometria in cyclic ewes (Days 10-16) and pregnant ewes (Days 10-20)...
July 2009: Biology of Reproduction
https://www.readbyqxmd.com/read/19140449/-effect-of-spermine-on-kinetic-characteristics-of-atp-hydrolase-systems-of-the-uterus-myocyte-plasma-membranes
#20
T O Veklich, O A Shkrabak, S O Kosterin
The paper deals with the activation effect of aliphatic polyamine spermine (1 mM) on the enzymatic activity of ouabain-sensitive Na+,K(+)-ATPase and the ouabain-resistant basal Mg(2+)-ATPase in the suspension of the myometrium cell plasma membranes treated with 0.1% digitonin solution. It was found that spermine increased the enzymatic Na+,K(+)-ATPase activity without disrupting of its dome-shaped dependence on the ratio of [Na+]/ [K+] in isotonic condition. The constants of the enzyme activation by Na+ and K+ ions did not vary...
July 2008: Ukraïnsʹkyĭ Biokhimichnyĭ Z︠h︡urnal
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