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Citrullination preeclampsia

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https://www.readbyqxmd.com/read/26105948/early-pregnancy-asymmetric-dimethylarginine-adma-levels-in-women-prone-to-develop-recurrent-hypertension
#1
C A H Rijvers, S Marzano, B Winkens, J A Bakker, A A Kroon, M E A Spaanderman, L L H Peeters
OBJECTIVE: To evaluate early-pregnancy levels of ADMA (asymmetric dimethylarginine) in recurrent hypertensive pregnancy. STUDY DESIGN: In this retrospective observational study, blood samples from 35 normotensive women with a previous hypertensive pregnancy were obtained preconceptionally and at 12, 16 and 20weeks in their next pregnancy. We assessed ADMA, symmetric dimethylarginine (SDMA), l-arginine and l-citrulline. We analyzed differences in longitudinal patterns between normotensive (NT, n=18) and recurrent hypertensive (HT, n=17) pregnancies by linear mixed models, with a sub-analysis for preeclampsia (PE, n=6)...
April 2013: Pregnancy Hypertension
https://www.readbyqxmd.com/read/25546385/plasma-levels-of-dimethylarginines-in-preterm-very-low-birth-weight-neonates-its-relation-with-perinatal-factors-and-short-term-outcome
#2
Rob M Moonen, Maurice J Huizing, Giacomo Cavallaro, Gema E González-Luis, Pilar Bas-Suárez, Jaap A Bakker, Eduardo Villamor
Endogenously produced inhibitors of nitric oxide (NO) synthase, in particular asymmetric dimethylarginine (ADMA), are currently considered of importance in various disease states characterized by reduced NO availability. We investigated the association between plasma levels of ADMA, symmetric dimethylarginine (SDMA), L-arginine, and citrulline and perinatal factors and outcome in 130 preterm (gestational age ≤ 30 weeks) very low birth weight (VLBW, < 1500 g) infants. Plasma samples were collected 6-12 h after birth...
December 23, 2014: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/24819773/efficient-neutrophil-extracellular-trap-induction-requires-mobilization-of-both-intracellular-and-extracellular-calcium-pools-and-is-modulated-by-cyclosporine-a
#3
Anurag Kumar Gupta, Stavros Giaglis, Paul Hasler, Sinuhe Hahn
Excessive or aberrant generation of neutrophil extracellular traps (NETs) has recently become implicated in the underlying aetiology of a number of human pathologies including preeclampsia, systemic lupus erythromatosus, rheumatoid arthritis, auto-antibody induced small vessel vasculitis, coagulopathies such as deep vein thrombosis or pulmonary complications. These results imply that effective pharmacological therapeutic strategies will need to be developed to counter overt NETosis in these and other inflammatory disorders...
2014: PloS One
https://www.readbyqxmd.com/read/22059458/the-role-of-asymmetric-dimethyl-arginine-and-oxidant-antioxidant-system-in-preeclampsia
#4
Hasan Alacam, Z Gunnur Dikmen, Halil Yaman, Erdinc Cakir, Ozgur Deren, E Ozgur Akgul, Ibrahim Aydin, Yasemin Gulcan Kurt, Ugur Keskin, Sukran Akalin, Belgin Polat, Nuri Danisman, Pakize Dogan
Preeclampsia is a syndrome characterized by hypertension and proteinuria. The aim of this study is to find the relationship between preeclampsia, asymmetric dimethyl arginine (ADMA), and the oxidant/antioxidant system. Twenty-one preeclamptic and 28 normal pregnant women were included in this study. In cord bloods, ADMA and oxidant/antioxidant parameters were measured. Asymmetric dimethyl arginine levels were significantly increased in preeclamptic pregnancies compared to the control group (p = 0.006). The activities of antioxidant enzymes and malondialdehyde levels were increased in the preeclamptic group compared to the control group (p < 0...
2011: Fetal and Pediatric Pathology
https://www.readbyqxmd.com/read/21858206/bothrops-jararaca-peptide-with-anti-hypertensive-action-normalizes-endothelium-dysfunction-involved-in-physiopathology-of-preeclampsia
#5
Gabriel Benedetti, Katia L P Morais, Juliano R Guerreiro, Eduardo Fontana de Oliveira, Mara Sandra Hoshida, Leandro Oliveira, Nelson Sass, Ivo Lebrun, Henning Ulrich, Claudiana Lameu, Antonio Carlos Martins de Camargo
Preeclampsia, a pregnancy-specific syndrome characterized by hypertension, proteinuria and edema, is a major cause of fetal and maternal morbidity and mortality especially in developing countries. Bj-PRO-10c, a proline-rich peptide isolated from Bothrops jararaca venom, has been attributed with potent anti-hypertensive effects. Recently, we have shown that Bj-PRO-10c-induced anti-hypertensive actions involved NO production in spontaneous hypertensive rats. Using in vitro studies we now show that Bj-PRO-10c was able to increase NO production in human umbilical vein endothelial cells from hypertensive pregnant women (HUVEC-PE) to levels observed in HUVEC of normotensive women...
2011: PloS One
https://www.readbyqxmd.com/read/19436322/in-vivo-arginine-production-and-nitric-oxide-synthesis-in-pregnant-indian-women-with-normal-and-low-body-mass-indices
#6
A V Kurpad, C Kao, P Dwarkanath, S Muthayya, A Mhaskar, A Thomas, M Vaz, F Jahoor
BACKGROUND/OBJECTIVES: Nitric oxide (NO) has been proposed as a mediator of vascular expansion during pregnancy. Inability to increase NO synthesis and/or production of its precursor, arginine, may be a contributor to pregnancy-induced hypertension or preeclampsia. Because maternal weight is associated with blood pressure and risk of preeclampsia during pregnancy, it may also influence arginine and/or NO production. The purpose of this study was to determine the in vivo arginine production and NO synthesis rate in pregnant women with normal (n=10) and low (n=10) body mass indices (BMIs)...
September 2009: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/16009421/reduced-l-arginine-level-and-decreased-placental-enos-activity-in-preeclampsia
#7
Y J Kim, H S Park, H Y Lee, E H Ha, S H Suh, S K Oh, H-S Yoo
Nitric oxide is produced enzymatically by the nitric oxide synthase (NOS), which converts L-arginine in the presence of oxygen to L-citrulline and NO. Moreover, it has been reported that asymmetric dimethylarginine (ADMA) acts as is an endogenous inhibitor of endothelial NOS (eNOS) by competing with the enzyme for L-arginine. In this study, we measured L-arginine and ADMA in normal and preeclamptic women, and also investigated the association between the Glu298Asp eNOS gene polymorphism and preeclampsia. Finally, we assessed eNOS expression levels in the placentas of both normal and preeclamptic patients, using Western blot and immunohistochemistry...
April 2006: Placenta
https://www.readbyqxmd.com/read/15638817/effects-of-prolonged-oral-supplementation-with-l-arginine-on-blood-pressure-and-nitric-oxide-synthesis-in-preeclampsia
#8
K Rytlewski, R Olszanecki, R Korbut, Z Zdebski
BACKGROUND: Several lines of evidence point to the dysfunction of the endothelial l-arginine-NO system in preeclampsia. We investigated the influence of dietary supplementation with l-arginine on blood pressure and biochemical measures of NO production in women with preeclampsia in prospective, randomized, placebo-controlled study. DESIGN: The 61 preeclamptic women on a standardized low nitrate diet received orally 3 g of l-arginine (n = 30) or placebo (n = 31) daily for 3 weeks as a supplement to standard therapy...
January 2005: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/14764055/preeclampsia-is-associated-with-loss-of-neuronal-nitric-oxide-synthase-expression-in-vascular-smooth-muscle-cells-of-the-human-umbilical-cord
#9
G Schönfelder, N Fuhr, D Hadzidiakos, M John, H Hopp, M Paul
AIMS: Umbilical blood vessels are not innervated and regulation of blood flow to the placenta must depend on structural changes and the effect of vasoactive factors. Failure to achieve these adaptations may result in reduced fetoplacental perfusion. The purpose of this study was to determine whether neuronal nitric oxide synthase (nNOS) is expressed in human vascular smooth muscle cells (VSMCs) of the fetoplacental circulation. nNOS has been described as a non-endothelial NOS counterregulating vasoconstriction only in the VSMCs of animal models...
February 2004: Histopathology
https://www.readbyqxmd.com/read/14744923/l-arginine-depletion-in-preeclampsia-orients-nitric-oxide-synthase-toward-oxidant-species
#10
Marina Noris, Marta Todeschini, Paola Cassis, Fabio Pasta, Anna Cappellini, Samantha Bonazzola, Daniela Macconi, Raffaella Maucci, Francesca Porrati, Ariela Benigni, Claudio Picciolo, Giuseppe Remuzzi
Less nitric oxide (NO)-dependent vasodilation and excess formation of reactive oxygen species could explain poor placenta perfusion in preeclampsia, but the pathways involved are unknown. We tested the hypothesis that reduced NO activity and increased oxidative stress in preeclamptic placenta is related to a low bioavailability of l-arginine. Placental endothelial NO synthase (ecNOS) expression (by immunoperoxidase) and activity (by diaphorase and [(3)H]L-citrulline formation) were comparable in normotensive pregnancy and in preeclampsia, whereas nitrotyrosine staining, a marker of peroxynitrite, was stronger in preeclamptic villi, confirming previously reported data...
March 2004: Hypertension
https://www.readbyqxmd.com/read/10960632/increased-l-citrulline-l-arginine-plasma-ratio-in-severe-preeclampsia
#11
C Benedetto, L Marozio, I Neri, M Giarola, A Volpe, F Facchinetti
OBJECTIVE: To evaluate nitric oxide (NO) production in patients with pregnancy-induced hypertension or preeclampsia and in controls. METHODS: Four groups of pregnant women were included: 17 patients with pregnancy-induced hypertension, ten with mild or moderate preeclampsia, 17 with severe preeclampsia, and 44 normotensive women matched for weeks of gestation at blood sampling with the cases. Plasma levels of L-citrulline and L-arginine were measured by using high-performance liquid chromatography...
September 2000: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/10486782/l-arginine-infusion-reduces-blood-pressure-in-preeclamptic-women-through-nitric-oxide-release
#12
F Facchinetti, M Longo, F Piccinini, I Neri, A Volpe
OBJECTIVE: This study investigates the biochemical and cardiovascular effects of L-arginine administration in normotensive pregnant women and women with preeclampsia. METHODS: The study groups consisted of 12 women with uncomplicated pregnancies and 17 preeclamptic patients, four of whom were on antihypertensive treatment. In both groups, saline infusion was started, followed by 30 g L-arginine administration, and finally more saline. Blood pressure was recorded every 5 minutes and blood samples were collected for measurement of serum citrulline, arginine, and nitrite levels...
July 1999: Journal of the Society for Gynecologic Investigation
https://www.readbyqxmd.com/read/10476613/nitric-oxide-synthase-activity-and-doppler-parameters-in-the-fetoplacental-and-uteroplacental-circulation-in-preeclampsia
#13
E Beinder, M G Mohaupt, D Schlembach, T Fischer, R B Sterzel, N Lang, C Baylis
OBJECTIVE: We investigated the hypothesis that changes in blood flow in the uteroplacental and fetoplacental circulation in preeclampsia are associated with an abnormality of placental or uterine placental bed nitric oxide (NO) synthesis. METHODS: We measured pulsatility indices on Doppler waveform analysis from uterine and umbilical arteries in 20 patients with preeclampsia and 14 healthy pregnant controls before elective cesarean section. During cesarean section, biopsies from the uterine placental bed and the placenta were taken and the nitric oxide synthase (NOS) activity was measured by the [3H] L-arginine-[3H] L-citrulline conversion assay in these samples...
1999: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/10376861/effect-of-l-arginine-load-on-platelet-aggregation-a-comparison-between-normotensive-and-preeclamptic-pregnant-women
#14
COMPARATIVE STUDY
F Facchinetti, I Neri, F Piccinini, M Marietta, U Torelli, P L Bruschettini, A Volpe
BACKGROUND: In the present study we hypothesized that a derangement of the L-arginine-nitric oxide system could be involved in the development of the hypercoagulative status found during preeclampsia. In order to verify such hypothesis we have compared the effects of nitric oxide substrate, L-arginine on platelet aggregation. Moreover, we have also measured the L-citrulline plasma levels as a stochiometric metabolite resulting from the conversion L-arginine to nitric oxide. METHODS: Nine preeclamptic women and 11 normotensive pregnant women were enrolled for the study...
July 1999: Acta Obstetricia et Gynecologica Scandinavica
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