Different responses of nitric oxide synthase inhibition on morphine-induced antinociception in male and female rats

2011 ◽  
Vol 18 (2) ◽  
pp. 143-149 ◽  
Author(s):  
Mahmoud Hosseini ◽  
Zahra Taiarani ◽  
Mosa Al-Reza Hadjzadeh ◽  
Soodabeh Salehabadi ◽  
Maryam Tehranipour ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Female Rats ◽  
Male And Female ◽  
Male And Female Rats ◽  
Oxide Synthase

scholarly journals Sex-specific vascular responses of the rat aorta: effects of moderate term (intermediate stage) streptozotocin-induced diabetes

2016 ◽  
Vol 94 (4) ◽  
pp. 408-415 ◽  
Author(s):  
Xiaoyuan Han ◽  
Sonali Shaligram ◽  
Rui Zhang ◽  
Leigh Anderson ◽  
Roshanak Rahimian
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Mrna Expression ◽  
Intermediate Stage ◽  
Diabetic Rats ◽  
Female Rats ◽  
Diabetic Rat ◽  
Male And Female ◽  
Male And Female Rats ◽  
Oxide Synthase

Hyperglycemia affects male and female vascular beds differently. We have previously shown that 1 week after the induction of diabetes with streptozotocin (STZ), male and female rats exhibit differences in aortic endothelial function. To examine this phenomenon further, aortic responses were studied in male and female rats 8 weeks after the induction of diabetes (intermediate stage). Endothelium-dependent vasodilation (EDV) to acetylcholine (ACh) was measured in phenylephrine (PE) pre-contracted rat aortic rings. Concentration response curves to PE were generated before and after L-NAME, a nitric oxide synthase (NOS) inhibitor. Furthermore, mRNA expression of endothelial nitric oxide synthase (eNOS) and NADPH oxidase subunit (Nox1) were determined. At 8 weeks, diabetes impaired EDV to a greater extent in female than male aortae. Furthermore, the responsiveness to PE was significantly enhanced only in female diabetic rats, and basal NO, as indicated by the potentiation of the response to PE after L-NAME, was reduced in female diabetic rat aortae to the same levels as in males. In addition, eNOS mRNA expression was decreased, while the Nox1 expression was significantly enhanced in diabetic female rats. These results suggest that aortic function in female diabetic rats after 8 weeks exhibits a more prominent impairment and that NO may be involved.

EFFECT OF RATE CORROSION OF Mg AND Mg ALLOY ON RENAL NITRIC OXIDE SYNTHASE ACTIVITY IN MALE AND FEMALE RATS

2018 ◽  
Vol 25 (3) ◽  
pp. 246 ◽  
Author(s):  
Juraj Laco ◽  
Andrej Barta ◽  
Marina Cebová ◽  
Miroslav Čavojský ◽  
František Simančík ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Female Rats ◽  
Mg Alloy ◽  
Male And Female ◽  
Male And Female Rats ◽  
Oxide Synthase ◽  
Nitric Oxide Synthase Activity

scholarly journals Diabetes induces sex-dependent changes in neuronal nitric oxide synthase dimerization and function in the rat gastric antrum

2007 ◽  
Vol 292 (3) ◽  
pp. G725-G733 ◽  
Author(s):  
Pandu R. R. Gangula ◽  
William L. Maner ◽  
Maria-Adelaide Micci ◽  
Robert E. Garfield ◽  
Pankaj Jay Pasricha
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Neuronal Nitric Oxide Synthase ◽  
Gastric Antrum ◽  
Female Rats ◽  
Male Rats ◽  
Organ Bath ◽  
Intragastric Pressure ◽  
Male And Female ◽  
Oxide Synthase

Diabetic gastroparesis is a disorder that predominantly affects women. However, the biological basis of this sex bias remains completely unknown. In this study we tested the hypothesis that a component of this effect may be mediated by the nitrergic inhibitory system of the enteric nervous system. Age-matched male and female Sprague-Dawley rats were studied 8 or 12 wk after streptozotocin (55 mg/kg body wt ip)-induced sustained hyperglycemia and compared with controls. Solid gastric emptying (GE) studies were performed in all the groups. Changes in gastric antrum neuronal nitric oxide synthase (nNOS) mRNA and protein levels were analyzed by real-time PCR and Western immunoblotting, respectively. nNOS dimerization studies were performed using low-temperature SDS-PAGE. In vitro nitrergic relaxation (area under curve/mg tissue wt) was studied after the application of electric field stimulation in an organ bath. Changes in intragastric pressure (mmHg·s) in freely moving rats in the presence or absence of NG-nitro-l-arginine methyl ester (nitric oxide synthase inhibitor) were examined by an ambulatory telemetric method. After diabetes induction, GE is delayed in both male and female rats. However, diabetic females exhibited significant delayed GE than in diabetic males. Compared with male controls, gastric nNOS expression and nitrergic relaxation were substantially elevated in healthy female control rats, accompanied by significantly reduced intragastric pressure. The active dimeric form and dimer-to-monomer ratio of nNOSα were also higher in healthy females compared with male rats ( P < 0.05). Diabetic females, but not males, showed significant ( P < 0.05) impairment in both gastric nNOSα dimerization and nitrergic relaxation, accompanied by an increase in intragastric pressure. Our data provide evidence that females may have a greater dependency on the nitrergic mechanisms in health. Furthermore, diabetes seems to affect the nitrergic system to a greater extent in females than in males. Together, these changes may account for the greater vulnerability of females to diabetic gastric dysfunction.

Effects of sex differences on constitutive nitric oxide synthase expression and activity in response to pressure overload in rats

2007 ◽  
Vol 293 (5) ◽  
pp. H2650-H2658 ◽  
Author(s):  
Xavier Loyer ◽  
Patricia Oliviero ◽  
Thibaud Damy ◽  
Estelle Robidel ◽  
Françoise Marotte ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Sex Differences ◽  
Nitric Oxide Synthase ◽  
Pressure Overload ◽  
Left Ventricular ◽  
Female Rats ◽  
Male Rats ◽  
Male And Female ◽  
Constitutive Nitric Oxide Synthase ◽  
Oxide Synthase

Clinical studies have documented sex differences in left ventricular (LV) hypertrophy patterns, but the mechanisms are so far poorly defined. This study aimed to determine whether 1) severe pressure overload altered expression and/or activity of cardiac constitutive nitric oxide synthase (NOS1 and NOS3) and 2) these changes were modulated according to sex. Analyses were performed 0.4–20 wk after thoracic aortic constriction (TAC) in male and female Wistar rats. Male rats with TAC exhibited early signs of cardiac dysfunction, as shown by echocardiographic and LV end-diastolic pressure measurements, whereas females with TAC exhibited higher LV hypertrophy (+96% vs. males at 20 wk; P < 0.05). After TAC, cardiac NOS1 expression was rapidly induced (0.4 wk) and stable afterward in males ( P < 0.05 vs. sham groups), whereas it was delayed in females. Accordingly, specific NOS1 activity was increased by 2 wk in male rats with TAC (+122%; P < 0.001 vs. sham groups) and only by 20 wk in females (+220%; P < 0.001 vs. sham groups). NOS1 activity was correlated with NOS1 level. Regarding cardiac NOS3, expression was unaffected by TAC, and the decrease in activity observed at early and late times in male and female rats with TAC, respectively, is shown to be related to NOS3 allosteric regulator caveolin-1 level. The data demonstrated a unique sex-dependent regulation of the constitutive NOSs in response to TAC in rats; such a difference might play a role in the sex-dependent adaptability of the heart in response to pressure overload.

scholarly journals Hypertensive female Sprague-Dawley rats require an intact nitric oxide synthase system for compensatory increases in renal regulatory T cells

2020 ◽  
Vol 319 (2) ◽  
pp. F192-F201
Author(s):  
Lindsey A. Ramirez ◽  
Ellen E. Gillis ◽  
Jacqueline B. Musall ◽  
Riyaz Mohamed ◽  
Elizabeth Snyder ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
T Cells ◽  
Angiotensin Ii ◽  
Nitric Oxide Synthase ◽  
Regulatory T Cells ◽  
Female Rats ◽  
Sprague Dawley ◽  
Albumin Excretion ◽  
Sprague Dawley Rats ◽  
Oxide Synthase

We have previously shown that hypertensive female rats have more regulatory T cells (Tregs), which contribute more to blood pressure (BP) control in female versus male rats. Based on known protective properties of Tregs, the goal of the present study was to investigate the mechanisms by which female rats maintain Tregs. The present study was designed to 1) compare the impact of three hypertension models on the percentage of renal Tregs and 2) test the hypothesis that nitric oxide synthase (NOS) inhibition prevents increases in renal Tregs and exacerbates renal damage in female Sprague-Dawley rats. Rats (11–14 wk old) were randomized to one of the following four groups: control, norepinephrine (NE) infusion, angiotensin II infusion, or the NOS inhibitor Nω-nitro-l-arginine methyl ester (l-NAME) in drinking water. BP was measured via tail cuff. After 2 wk of treatment, kidneys were isolated and processed to measure Tregs via flow cytometric analysis and renal injury via urinary albumin excretion, plasma creatinine, and histological analyses. Hypertensive treatments increased BP in all experimental animals. Increases in BP in norepinephrine-and angiotensin II-treated rats were associated with increases in renal Tregs versus control. In contrast, l-NAME treatment decreased Tregs compared with all groups. l-NAME treatment modestly increased albumin excretion. However, plasma creatinine was comparable among the groups, and there was no histological evidence of glomerular or tubular injury. This study provides insights into the mechanisms regulating renal Tregs and supports that an intact NOS system is crucial for female rats to have BP-related increases in renal Tregs.

Glial and neuronal localization of neuronal nitric oxide synthase immunoreactivity in the median eminence of female rats

1998 ◽  
Vol 789 (2) ◽  
pp. 322-326 ◽  
Author(s):  
Shin-ichi Kawakami ◽  
Masumi Ichikawa ◽  
Makoto Yokosuka ◽  
Hiroko Tsukamura ◽  
Kei-ichiro Maeda
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Median Eminence ◽  
Neuronal Nitric Oxide Synthase ◽  
Female Rats ◽  
Oxide Synthase

Triiodothyronine attenuates the progression of renal injury in a rat model of chronic kidney disease

2018 ◽  
Vol 96 (6) ◽  
pp. 603-610 ◽  
Author(s):  
Sahar M. El Agaty
Keyword(s):  
Nitric Oxide ◽  
Chronic Kidney Disease ◽  
Nitric Oxide Synthase ◽  
Kidney Disease ◽  
Renal Injury ◽  
Serum Levels ◽  
Female Rats ◽  
Renal Tubules ◽  
Oxide Synthase ◽  
Remnant Kidney

This study was designed to investigate whether and how triiodothyronine (T3) affects renal function in an experimental model of chronic kidney disease. Twenty-four female rats were divided into the following groups: sham-operated control group (n = 8), 5/6 nephrectomized group (Nx, n = 8), and 5/6 nephrectomized group treated with T3 for 2 weeks (T3-Nx, n = 8). T3 administration significantly decreased serum levels of urea, creatinine, tumour necrosis factorα, and interleukin-6 compared with serum levels in the Nx group. The levels of malondialdehyde, transforming growth factor β, fibronectin, and collagen IV, as well as the expression of inducible nitric oxide synthase, nuclear factor κB, poly(ADP-ribose) polymerase, caspase-3, and Bax were all significantly decreased, though not normalized, in the remnant kidney of rats in the T3-Nx group compared with Nx rats. Glutathione, heme oxygenase-1 levels, as well as endothelial nitric oxide synthase expression were increased in the remnant kidney of the T3-Nx group. Histological studies revealed focal necrosis of renal tubules associated with inflammatory cell infiltration and fibrosis in the Nx group. These changes were alleviated in T3-Nx rats. This study showed that T3 administration attenuated the clinical and histological signs of renal injury in 5/6 nephrectomized rats by mitigating renal oxidative stress, inflammation, apoptosis, and fibrosis.

Exercise training improves myocardial tolerance to ischemia in male but not in female rats

2007 ◽  
Vol 293 (1) ◽  
pp. R363-R371 ◽  
Author(s):  
David B. Thorp ◽  
James V. Haist ◽  
Jennifer Leppard ◽  
Kevin J. Milne ◽  
Morris Karmazyn ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Exercise Training ◽  
Endothelial Nitric Oxide Synthase ◽  
Diastolic Pressure ◽  
Female Rats ◽  
Female Rat ◽  
Rat Hearts ◽  
Oxide Synthase ◽  
Endothelial Nitric Oxide

Acute exercise increases myocardial tolerance to ischemia-reperfusion (I-R) injury in male but not in female rat hearts, possibly due to a decreased heat shock protein 70 (Hsp70) response in the female hearts. This study examined whether repetitive exercise training would increase Hsp70 and myocardial tolerance to I-R injury in female rat hearts. Adaptations in myocardial manganese superoxide dismutase (MnSOD) and endothelial nitric oxide synthase (eNOS) were also assessed. Ten-week old male (M) and female (F) Sprague-Dawley rats ( n = 40 total) exercise-trained for 14 wk; the last 8 wk consisted of running 1 h at 30 m/min (2% incline), 5 days/wk. Following training, left ventricle mechanical function (LVMF) was monitored for 30 min of reperfusion following 30 min of global ischemia (Langendorff procedure). Myocardial Hsp70 content was not different in M and F control groups, while increases were observed in both trained groups (M greater than F; P < 0.05). Although MnSOD content did not differ between groups, endothelial nitric oxide synthase (eNOS) levels were decreased in F, with no change in M, following training ( P < 0.05). Hearts from control F demonstrated a greater recuperation of all indices of LVMF following I-R compared with control M hearts ( P < 0.05). Hearts of trained M exhibited improved recovery of LVMF (left ventricular diastolic pressure, left ventrcular end-diastolic pressure, +dP/d t, −dP/d t) during reperfusion compared with control M hearts ( P < 0.05). In contrast, hearts of trained F did not show any change in recovery from I-R. Hence, exercise training is more beneficial to M than F in improving myocardial function following I-R injury.

Estrogen, but not progesterone, induces the activity of nitric oxide synthase within the medial preoptic area in female rats

2014 ◽  
Vol 1578 ◽  
pp. 23-29 ◽  
Author(s):  
Fernanda Barbosa Lima ◽  
Fábio Honda Ota ◽  
Fernanda Jankur Cabral ◽  
Bruno Del Bianco Borges ◽  
Celso Rodrigues Franci
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Preoptic Area ◽  
Medial Preoptic Area ◽  
Female Rats ◽  
Oxide Synthase
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