Maternal treadmill exercise ameliorates impairment of neurological outcome, caspase-1 and NLRP3 gene expression alteration in neonatal hypoxia-ischemia rats

Objectives

Neonatal hypoxia-ischemia (HI) is one of the most important causes of neurological disorders in children. Various studies suggest that maternal exercise during pregnancy has a beneficial impact on the health status of offspring infants. In this study, the effect of maternal treadmill exercise during pregnancy on neurological and molecular changes induced by HI in newborn rats was investigated.

Materials and Methods

In this experiment, 24 pregnant female rats were divided into two groups; the first group was subjected to treadmill exercise for six weeks. The treadmill exercise program was initiated by running for 17 min at 5-10 m/min at 0 inclination in the first week, followed by running for 21 min at 5-25 m/min at 5° inclination in the second week, running for 25 min at 5-30 m/min at 10° inclination in the third and fourth weeks, running for 25 min at 5-15 m/min at 10° inclination in the fifth and sixth weeks. The second group was left untreated and did not perform the exercise. Newborn rats were assigned to four groups; (1) control, (2) control+exercise, (3) HI, and (4) HI+exercise. HI was developed in the offspring on the 8th postnatal day. One week following the induction of HI, the Garcia test was carried out. The histological morphology of neonates was assessed, and the expression levels of caspase-1 and NLRP3 were evaluated.

Results

The data showed that maternal exercise during pregnancy significantly improved neural cell death (P<0.001) and the Garcia score (P<0.05), while it attenuated the expression levels of caspase-1 (P<0.001) and NLRP3 (P<0.05) genes in newborn rats induced by HI.

Conclusion

These results demonstrated that maternal treadmill exercise during pregnancy could reverse the neurological deficits, as well as the expression levels of caspase-1 and NLRP3 genes, which occur in neonatal hypoxia-ischemia.

The protective effects of eugenol on metabolic-syndrome, renal damages

Introduction: Metabolic syndrome consists of a group of abnormities which is involved with chronic kidney disease and nephropathy. Eugenol is an important phenolic component, which is present in many plants’ essential oils such as cloves oil with antioxidant effects. Objectives: Our study planned to demonstrate eugenol’s effects over nephrotoxicity derived from metabolic syndrome. Materials and Methods: Thirty-five male Wistar rats were picked accidentally and then divided into five groups including 1) tap water; 2) water with fructose10%; 3) water with fructose + sweet almond oil and administered intraperitoneally; 4) water with fructose+ eugenol 50 mg/kg/d and administered intraperitoneally; 5) water with fructose+ eugenol 100 mg/kg/d administered intraperitoneally. This regime lasted for 60 days, and at the beginning of day 31st, injections started for 30 days. Assessment of serum, urine and renal parameters (in homogenized kidney tissue) were conducted in the last step. Results: The results argued that the induction of metabolic syndrome following renal injury has significantly increased serum blood urea nitrogen (BUN) and creatinine (Cr) levels in the fructose group. Consumption of eugenol resulted in a significant reduction in the level of these two biochemical factors (P < 0.05). The renal level of malondialdehyde (MDA) increased in the fructose group while treatment with a dose of 50 eugenol decreasing its level (P < 0.05). Proteinuria and kidney tissue damage score (KTDS) increased in the fructose group compared with the tap water group (P < 0.001). It is noteworthy that treatment with eugenol did not affect the level of proteinuria and KTDS with any of the used doses. Conclusion: Our results indicated the improvement of renal functioning and decrease in lipid peroxidation, although eugenol doses used in this study did not reduce proteinuria and KTDS.

Effects of Eugenol on Pain Response to the Formalin Test and Plasma Antioxidant Activity in High Fructose Drinking Water in Male Rats

Background:

Increased consumption of fructose in recent years has increased the risk of developing metabolic syndrome. In this syndrome, induction of oxidative stress, cellular dysfunction, and decrease of antioxidant capacity can change response to pain. Therefore, this study aims to investigate the antinociceptive and antioxidant effects of eugenol on metabolic syndrome induced by a fructose-rich diet in rats.

Methods:

The rats were randomly assigned to five groups, to be under experiment for eight weeks. The first, control group, the second fructose 10% plus tween 0.5% (Fr + veh), the third fructose 10% (Fr), and the fourth fructose 10% plus a single dose of eugenol 100 mg/kg (Fr + EoS). However, the fifth obtained fructose 10% plus a continuous dose of eugenol 20 mg/kg/day (Fr + EoC) for the last 10 days of the experiment. After formalin test, blood samples were taken from the animals’ hearts followed by analysis for biochemical factors.

Results:

This study shows that fructose administration does not change any pain response and there are not any changes in pain response between Fr group and control group. However, treatment with single and continuous dose of eugenol in Fr + EoS and Fr + EoC groups significantly decreases response to pain in the first and second phase of formalin test in comparison with Fr group (P<0.05). Continuous does of eugenol improved serum malondialdehyde and total antioxidant capacity levels in Fr + Eoc group in comparison with Fr group.

Conclusions:

In the present work, new findings suggest the beneficial effects of eugenol in pain relief, improved serum glucose, insulin levels, and improved antioxidant activity in metabolic syndrome.

The Effects of Iron Oxide Nanoparticles Administration on Depression Symptoms Induced by LPS in Male Wistar Rats

INTRODUCTION

Depression is a mood disorder in which feelings of sadness, loss, anger, or frustration interfere with everyday life for one to several weeks. Several studies have shown that iron nanoparticles have neuroprotective and anti-inflammatory effects. This study aimed to evaluate anti-depressive effect of iron nanoparticles in male rats.

METHODS

Depression was induced by Lipopolysaccharide (LPS) adminstration. Rats were randomly assigned into six groups (10 in each group): 1) control (sterile saline solution; 200 μL, IP); 2) LPS (LPS;100 μg/kg, IP); 3) Low dose Iron Nanoparticle (LINP) (1 mg/kg, IP); 4) High dose Iron Nanoparticle (HINP), 5 mg/kg IP); 5) LPS/LINP (LPS; 100μg/kg IP+INP 1 mg/kg IP); and 6) LPS/HINP (LPS; 100 μg/kg IP+INP 5 mg/kg IP). All injections were performed every other day. To assess the effect of iron nanoparticles on depression symptoms, rats were subjected to two behavioral tests: Forced Swim Test (FST) and Open Field Test (OFT).

RESULTS

Iron nanoparticles treatment in 1 mg/kg and 5 mg/kg doses groups significantly improved depression symptoms when assessed by OFT and FST. In OFT, the number of line crossings, entrance to central square, rearing and duration of attending in central square increased after iron nanoparticles adminstration in depressed rats. Iron nanoparticles adminstration reduced immobility time confirmed by FST and OFT. Also, iron nanoparticles adminstration significantly increased duration of swimming in FST depressed rats.

CONCLUSION

Our results for the first time showed potential advantageous effect of iron nanoparticles administration in attenuating depression symptoms, which was possibly mediated by modulation of neurotransmitters and anti-inflammatory effects of iron nanoparticles.

Anti-nociceptive and anti-inflammatory effects of Withania somnifera root in fructose fed male rats

BACKGROUND

Insulin resistance is a metabolic disorder which affects the diabetes mellitus pathophysiology and alters the cell excitability. This study has been designed to evaluate the anti-nociceptive and anti-inflammatory effects of chronic administration of Withania somnifera root (WSR) in fructose drinking water rats.

METHODS

An experiment was carried out on 48 Wistar-Albino male rats, weighting 200±30 g, which were divided into six groups (n=8): control group (C), control morphine (CM), W. somnifera group (WS) which received WSR (62.5 mg/g diet), W. somnifera naloxone group (WSN) which received WSR and naloxone, fructose (F) group which received fructose drinking water and FWS group which received fructose-enriched drinking water and WSR during the trial period. A biphasic pain response was induced after intraplantar injection of formalin (50 μL, 1%). Pain behavior was measured using Dubuisson methods. The obtained data were analyzed by SPSS software V. 18, using ANOVA and Tukey test. Results were expressed as mean±SD. Statistical differences were considered significant at p<0.05.

RESULTS

The results showed that the insulin resistance index, blood sugar, insulin, IL-6, TNF-α, and acute and chronic pain score in the F group were significantly increased in comparison with the control group, but these parameters in the FWS group were significantly decreased compared with the F group (p<0.001).

CONCLUSIONS

Our findings indicated that chronic oral administration of WSR has analgesic and anti-inflammatory effects in fructose drinking water rats and causes improved insulin resistance index.

The Antinociceptive Effects of Hydroalcoholic Extract of Borago Officinalis Flower in Male Rats Using Formalin Test

INTRODUCTION

Borago officinalis flower (borage) is a known sedative in herbal medicine; the aim of the present study was to evaluate the antinociceptive effect of borage hydroalcoholic extract in formalin test male rats.

METHODS

Fifty-six adult male albino Wistar rats were randomly divided into seven groups: Control groups of A (intact), B (saline), and C (Positive control) plus test groups of D, E, F, and G (n=8). The groups D, E, and F received 6.25, 12.5, and 25 mg/kg, Borago officinalis flower hydroalcholic extract before the test, respectively but group G received 25 mg/kg borage extract and aspirin before the test. A biphasic pain was induced by injection of formalin 1%. The obtained data were analyzed by SPSS software ver. 17 employing statistical tests of Kruskal-Wallis and Mann-Whitney. The results were expressed as mean±SD. Statistical differences were considered significant at P<0.05.

RESULTS

The results revealed that the acute and chronic pain behavior score in test groups of D, E, F, and G significantly decreased compared to groups A and B, but this score did not show any difference compared to group C. Moreover, chronic pain behavior score in group G was significantly lower than all other groups.

DISCUSSION

The results indicated that Borago officinalis hydroalcoholic extract affects the acute and chronic pain behavior response in formaline test male rats.

Chronic Administration of High Doses of Nandrolone Decanoate on the Pituitary-Gonadal Axis in Male Rats

Background:

Anabolic-androgenic steroids (AAS) are abused by athletes.

Objectives:

The present study was designed to evaluate chronic administration of high doses of nandrolone decanoate (ND) on the pituitary-gonadal axis and hematological parameters in normal male rats.

Materials and Methods:

Thirty Wistar-Albino male rats were divided assigned to control (C), placebo (P) and test (T) groups (n = 10). Group T received 15 mg/kg intramuscular (IM) ND for eight weeks. Group P received the same volume of peanut oil, but group C did not receive any agent during the trial period. At the end, animals were anesthetized, killed and blood samples collected from cervical vessels. Serum follicle stimulating hormone (FSH) and luteinizing hormone (LH) levels were determined by sensitive rat gonadotropins kit, using ELISA methods. Serum testosterone and hematological parameters were measured by ordinary laboratory methods. Obtained data was analyzed using SPSS 17 by ANOVA and Tukey statistical tests. Results were expressed as Mean ± SD. Statistical difference considered significantly by P < 0.05.

Results:

Serum testosterone, LH, FSH, weight gain, food and water intake in group T were significantly decreased compared to other groups (P < 0.05). In addition erythrocyte, leucocytes, hemoglobin and hematocrit in group T were significantly increased compared to those of other groups (P < 0.05).

Conclusions:

Chronic administration of high doses of ND can alter serum FSH, LH and testosterone and hematological parameters in male rats.

Influence of nandrolone decanoate administration on serum lipids and liver enzymes in rats

BACKGROUND

Anabolic-androgenic steroids have been associated with several side effects range. This experimental study was conducted to evaluate the effects of nandrolone decanoate (ND, an anabolic steroid) on lipid profile and liver enzymes in rats in Iran.

METHODS

Forty adult male and female of Wistar strain rats were randomly assigned to four groups of 10 animals each: male control, female control, ND-male treated (15 mg/kg b.w./day), and ND-female treated (15 mg/kg b.w./day). Serum concentrations of total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol, aspartate aminotransferase (AST), and alanine aminotransferase (ALT) were measured in all studied groups.

RESULTS

Treating rats with ND (case group) resulted in a significant elevation of TC (69.4 ± 8.7), TG (101.6 ± 32.9) and ALT (72.2 ± 13.8) and significant reduction of LDL (6.4 ± 2.6) and AST (138.7 ± 19.4) as compared to control group in female rats. ND supplementation (case group) significantly increased TC (64.4 ± 6.2), AST (255.0 ± 32.0), and ALT (84.3 ± 3.8) in comparison with the control group in male rats.

CONCLUSION

Overall, our result indicated that the ND use can cause a negative effect on lipid profile and liver enzyme in rats.

Protective effects of Withania somnifera root on inflammatory markers and insulin resistance in fructose-fed rats

BACKGROUND

We investigated the effects of Withania somnifera root (WS) on insulin resistance, tumor necrosis factor α (TNF-α), and interleukin-6 (IL-6) in fructose-fed rats.

METHODS

Forty-eight Wistar-Albino male rats were randomly divided into four groups (n=12); Group I as control, Group II as sham-treated with WS by 62.5mg/g per diet, Group III fructose-fed rats received 10%W/V fructose, and Group IV fructose- and WS-fed rats. After eight weeks blood samples were collected to measure glucose, insulin, IL-6, and TNF-α levels in sera.

RESULTS

Blood glucose, insulin, homeostasis model assessment for insulin resistance (HOMA-R), IL-6, and TNF-α levels were all significantly greater in the fructose-fed rats than in the controls. Treatment with WS significantly (P < 0.05) inhibited the fructose-induced increases in glucose, insulin, HOMA-R, IL-6, and TNF-α.

CONCLUSION

Our data suggest that WS normalizes hyperglycemia in fructose-fed rats by reducing inflammatory markers and improving insulin sensitivity.

The effects of ecstasy on liver function tests, blood glucose, and lipids profile of male rats

Background:

Ecstasy is used to improve mood and cordiality; however, based on some reports, it is neurotoxic to human users.

Objectives:

Because of the euphoria induced by MDMA (3,4-methylenedioxymethamphetamine) on the users, its consumption is increasing in almost all countries. This study was carried out to determine the effects of ecstasy administration in rats’ blood sugar, lipids profile, and liver function tests.

Materials and Methods:

The experiment was performed using 50 mature Wistar-Albino male rats. The rats were divided into five groups (n = 10). Sham control group (A), received tap water and ordinary rodent diet. The control (B) was administered saline but tests group C, D1, and D2 received single dose and multiple doses of MDMA, respectively. After experimental period, animals were deeply anesthetized by diethyl ether, sacrificed and the blood samples were collected for the evaluation of blood glucose, serum lipid and aspartate transaminase (AST), alanine transaminase (ALT), and alkaline phosphatase (ALK-P). Data were expressed as mean ± SD and statistical difference was considered significant at P < 0.05.

Results:

In C group, the values of blood sugar (193.8 ± 11.6 mg/dL), low density lipoprotein (LDL) (19.2 ± 7.9 mg/dL), and cholesterol (76.1 ± 10.6 mg/dL), were significantly increased compared with those of control A and B (135 ± 12.7), (140 ± 18.8), and (45.4 ± 9.8), (49.8 ± 2.1) (49.4 ± 10.6) groups. However, aspartate transaminase (AST) and alanine transaminase (ALT) were significantly increased in groups D1 (145.8 ± 14.7 U/L), (91.1 ± 8.1 U/L), and D2 (159.4 ± 13.8 U/L) and (75.4 ± 7.8) compared with those of group A (107.2 ± 8.1), (45.4 ± 9.8), B (79.8 ± 12.1), (49.8 ± 2.1), and C (115.6 ± 17.5), (52.1 ± 7.6 U/L). Cholesterol and LDL increased in groups C and D compared with group A.

Conclusions:

These results indicated that chronic administration of MDMA affects liver as well as lipoprotein profile in male rats. The exact mechanism of action needs further investigation.

Aloe vera Aqueous Extract Effect on Morphine Withdrawal Syndrome in Morphine-Dependent Female Rats

BACKGROUND

Aloe vera is a medicinal herb used as an anti-inflammatory and sedative agent.

OBJECTIVES

The current study aimed to evaluate the effect of Aloe vera aqueous extract on morphine withdrawal symptoms in morphine-dependent female rats.

PATIENTS AND METHODS

The current research was performed on 40 female Wista-Albino rats which were made dependent on morphine using Houshyar protocol and were randomly divided into five groups (A, B, C, D, and E). Group A did not receive any agent in the period of handling but other groups (B, C, D and E) received 5, 10, 20 and 40 mg/kg of Aloe vera aqueous extract by gavage, three times daily for a week, respectively. Withdrawal symptoms, stool form, agitation, disparity, floppy eyelids, and body mass variations were checked for 10 days. The obtained data were analyzed using SPSS v.11 software, and Friedman, Kruskal-Wallis, and Mann-Whitney statistical tests. Statistical difference was considered significant (P < 0.05).

RESULTS

The results of the present study showed that agitation, disparity, and floppy eyelids in group E were significantly higher than those of others groups; however, these symptoms in group C were significantly lower than those of the other groups.

CONCLUSIONS

The results of the present study revealed that the Aloe vera aqueous extract had various effects on morphine withdrawal syndrome in morphine-dependent female rats .

The effect of Teucrium polium (Calpoureh) on liver function, serum lipids and glucose in diabetic male rats

BACKGROUND

Teucrium polium is an analgesic, antidiabetic and antilipeidemic herbal medicament. The aim of this survey was to evaluate the effect of aqueous extract T. polium on liver enzymes linked to liver dysfunction, serum lipids and glucose, in diabetic male rats.

METHODS

A total of 20 Sprague-Dawly male rats became diabetic by intraperitoneal injection of streptozotocin (60 mg/kg). the animals were divided randomly into two groups. Experimental group was fed Teucrium polium (50 mg/kg) for a month but control group was received the same volume of distilled water. Liver enzymes, biochemical parameters (cholesterol, triglyceride, low density lipoprotein, alanine transaminase, aspartae transaminase) and glucose were measured by kinetic (Enzymatic) and colorimetric methods. Data obtained were analyzed and mean values were compared by paired student's t-test. The results were expressed as mean +/- SD. Significant differences were set at P < 0.05.

RESULTS

Our results showed that in test group, serum glucose values decreased significantly (P < 0.05), but cholesterol, triglyceride, low density lipoprotein, alanine transaminase and aspartae transaminase increased significantly after use of T. polium (P < 0.05). This parameters value did not show any changes in control group.

CONCLUSION

Although the aqueous extract of Teucrium polium has strong hypoglycemic properties in experimental animals, but because of some hepatotoxic effects, it is not suitable to use it in human as an antidiabetic agent.