Central Opioidergic System Interplay with Histamine on Food Intake in Neonatal Chicks: Role of µ-Opioid and H1/H3 Receptors

The present study was designed to examine the role of Opioidergic and Histaminergic systems on feeding behavior in 3-hour food deprived neonatal meat- type chicks. In experiment 1, chicks received intracerebroventricular (ICV) injection of (A) control solution, (B) -FMH (alpha fluoromethyl histidine; 250 nmol), (C) DAMGO (µ-opioid receptor agonist, 125 pmol) and (D) -FMH + DAMGO. Experiments 2-4 were similar to experiment 1, except chicken ICV injected with Chlorpheniramine (histamine H1 receptors antagonist; 300 nmol), famotidine (histamine H2 receptors antagonist; 82 nmol) and Thioperamide (histamine H3 receptors antagonist; 300 nmol) instead of the -FMH. In experiments 5-8, birds ICV injected with the same procedure as experiments 1-4, except they were injected with DPDPE (-opioid receptor agonist, 40 nmol) instead of DAMGO. (AU)

Central Opioidergic System Interplay with Histamine on Food Intake in Neonatal Chicks: Role of µ-Opioid and H1/H3 Receptors

The present study was designed to examine the role of Opioidergic and Histaminergic systems on feeding behavior in 3-hour food deprived neonatal meat- type chicks. In experiment 1, chicks received intracerebroventricular (ICV) injection of (A) control solution, (B) -FMH (alpha fluoromethyl histidine; 250 nmol), (C) DAMGO (µ-opioid receptor agonist, 125 pmol) and (D) -FMH + DAMGO. Experiments 2-4 were similar to experiment 1, except chicken ICV injected with Chlorpheniramine (histamine H1 receptors antagonist; 300 nmol), famotidine (histamine H2 receptors antagonist; 82 nmol) and Thioperamide (histamine H3 receptors antagonist; 300 nmol) instead of the -FMH. In experiments 5-8, birds ICV injected with the same procedure as experiments 1-4, except they were injected with DPDPE (-opioid receptor agonist, 40 nmol) instead of DAMGO.

Central Opioidergic System Interplay with Histamine on Food Intake in Neonatal Chicks: Role of µ-Opioid and H1/H3 Receptors

ABSTRACT The present study was designed to examine the role of Opioidergic and Histaminergic systems on feeding behavior in 3-hour food deprived neonatal meat- type chicks. In experiment 1, chicks received intracerebroventricular (ICV) injection of (A) control solution, (B) -FMH (alpha fluoromethyl histidine; 250 nmol), (C) DAMGO (µ-opioid receptor agonist, 125 pmol) and (D) -FMH + DAMGO. Experiments 2-4 were similar to experiment 1, except chicken ICV injected with Chlorpheniramine (histamine H1 receptors antagonist; 300 nmol), famotidine (histamine H2 receptors antagonist; 82 nmol) and Thioperamide (histamine H3 receptors antagonist; 300 nmol) instead of the -FMH. In experiments 5-8, birds ICV injected with the same procedure as experiments 1-4, except they were injected with DPDPE (-opioid receptor agonist, 40 nmol) instead of DAMGO. Experiments 9-12 were similar to the experiments 1-4, except neonatal broilers ICV were injected with U-50488H (-opioid receptor agonist, 30 nmol) instead of DAMGO. Then the cumulative food intake was measured until 120 min post injection. According to the results, ICV injection of DAMGO, significantly decreased food intake (p 0.05) while DPDPE and U-50488H increased feeding behavior compared to the control group (p 0.05). Co-administration of the -FMH and DAMGO significantly inhibited hypophagic effect of the DAMGO in neonatal broilers (p 0.05). Also, Chlorpheniramine significantly inhibited DAMGO- induced feeding behavior in neonatal chicks (p 0.05). In addition, co-administration of the Thioperamide + DAMGO significantly amplified the hypophagic effect of the DAMGO in neonatal chicks (p 0.05). However, famotidine had no effect on food intake induced by DAMGO (p>0.05). Also, the hyperphagic effect of DPDPE and U-50488 had no affect by -FMH, Chlorpheniramine, famotidine and Thioperamide (p>0.05). These results suggested that an interconnection between central opioidergic and histaminergic systems on feeding behavior is mediated via µ-opioid and H1/H3 receptors in neonatal broilers.

Tramadol reduces testicular damage of ischemia-reperfusion rats

The main purpose of this study was to determine effect of tramadol administration on testis histology and oxidative stress experimental on testicular ischemia-reperfusion injury in male Wistar rats. Twenty-four male Wistar rats were randomly divided into four experimental groups. The Sham group (A): no medication was employed; abdominal cavity was opened but no ischemia-reperfusion-induced. The ischemia-reperfusion group (B): abdominal cavity was opened, testicular ischemia-reperfusion-induced without pre-medication. Ischemia-reperfusion +20mg/kg tramadol group (C), animal orally administrated with Tramadol (20 mg/kg) for 1 week prior testicular ischemia-reperfusion. Ischemia-reperfusion +40 mg/kg tramadol group (D) was similar to group C, but the animals received 40 mg/kg tramadol instead of 20mg/kg. In all experimental groups, animals were exposed to midline laparotomy with occlusion of the infrarenal aortic for 1 h ischemia by 24 h of reperfusion in the left testis. After 24 h, the abdomen was opened, the left testis extracted for histopathological studies. Semen samples from caudal epididymis were collectedto determine malondialdehyde, superoxide dismutase, glutathione peroxidase and total antioxidant status. According to the data, testicular ischemia-reperfusion degenerated seminiferous tubules and spermatogenesis in animals (P < 0.05). Administration of 40 mg/kg of tramadol protect testicular against ischemia-reperfusion injury (P < 0.05). Administration of 40mg/kg tramadol increased superoxide dismutase and glutathione peroxidase while diminished malondialdehyde levels in testicular ischemia-reperfusion injury (P < 0.05). These results suggest tramadol might be a potent agent in preventing testicular IR injury.

Tramadol reduces testicular damage of ischemia-reperfusion rats

The main purpose of this study was to determine effect of tramadol administration on testis histology and oxidative stress experimental on testicular ischemia-reperfusion injury in male Wistar rats. Twenty-four male Wistar rats were randomly divided into four experimental groups. The Sham group (A): no medication was employed; abdominal cavity was opened but no ischemia-reperfusion-induced. The ischemia-reperfusion group (B): abdominal cavity was opened, testicular ischemia-reperfusion-induced without pre-medication. Ischemia-reperfusion +20mg/kg tramadol group (C), animal orally administrated with Tramadol (20 mg/kg) for 1 week prior testicular ischemia-reperfusion. Ischemia-reperfusion +40 mg/kg tramadol group (D) was similar to group C, but the animals received 40 mg/kg tramadol instead of 20mg/kg. In all experimental groups, animals were exposed to midline laparotomy with occlusion of the infrarenal aortic for 1 h ischemia by 24 h of reperfusion in the left testis. After 24 h, the abdomen was opened, the left testis extracted for histopathological studies. Semen samples from caudal epididymis were collectedto determine malondialdehyde, superoxide dismutase, glutathione peroxidase and total antioxidant status. According to the data, testicular ischemia-reperfusion degenerated seminiferous tubules and spermatogenesis in animals (P < 0.05). Administration of 40 mg/kg of tramadol protect testicular against ischemia-reperfusion injury (P < 0.05). Administration of 40mg/kg tramadol increased superoxide dismutase and glutathione peroxidase while diminished malondialdehyde levels in testicular ischemia-reperfusion injury (P < 0.05). These results suggest tramadol might be a potent agent in preventing testicular IR injury.(AU)

Assessment of the effects of red onion (Allium cepa Linn) juice on semen oxidative status compared to Zn sulfate in rats

The Aim of the present study was to investigate effects of onion juice on semen values of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GPx) and total antioxidant status (TAS) compared to Zn sulfate in rats. One hundred and sixty-two Wistar Male rats were randomly allocated into 9 treatment groups (each including 3 groups and 6 replicates). Group 1 served as control and received distilled water. In group 2, animals received 1 cc fresh onion juice. In group 3, rats were offered cc fresh onion juice. Group 4 drenched 15 mg/kg zinc (Zn) sulfate. In group 5, rats were treated with 30 mg/kg Zn sulfate. Group 6 was offered 1cc fresh onion juice + 15 mg/kg Zn sulfate to experimental animals. In group 7, 1 cc fresh onion juice + 30 mg/kg Zn sulfate was provided to rats. Group 8 consumed 2 cc fresh onion juice + 15 mg/kg Zn sulfate. In group 9, animals provided 2 cc fresh onion juice + 30 mg/kg Zn sulfate. All groups were given treatments orally and ad libitum access to chow pellets and fresh water. After 4 weeks semen samples in cauda epididymis were used to determine MDA, SOD, GPx and TAS levels. According to the data, sole onion juice significantly decreased semen MDA level (P < 0.05). Also, a combination between the administration of onion and Zn significantly attenuated sperm MDA (P < 0.05). Sperm GPx level in the co-administration of onion and Zn was significantly altered (P < 0.05). Results suggest that presumably onion juice protects from semen oxidation in rat testes.(AU)

Assessment of the effects of red onion (Allium cepa Linn) juice on semen oxidative status compared to Zn sulfate in rats

The Aim of the present study was to investigate effects of onion juice on semen values of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GPx) and total antioxidant status (TAS) compared to Zn sulfate in rats. One hundred and sixty-two Wistar Male rats were randomly allocated into 9 treatment groups (each including 3 groups and 6 replicates). Group 1 served as control and received distilled water. In group 2, animals received 1 cc fresh onion juice. In group 3, rats were offered cc fresh onion juice. Group 4 drenched 15 mg/kg zinc (Zn) sulfate. In group 5, rats were treated with 30 mg/kg Zn sulfate. Group 6 was offered 1cc fresh onion juice + 15 mg/kg Zn sulfate to experimental animals. In group 7, 1 cc fresh onion juice + 30 mg/kg Zn sulfate was provided to rats. Group 8 consumed 2 cc fresh onion juice + 15 mg/kg Zn sulfate. In group 9, animals provided 2 cc fresh onion juice + 30 mg/kg Zn sulfate. All groups were given treatments orally and ad libitum access to chow pellets and fresh water. After 4 weeks semen samples in cauda epididymis were used to determine MDA, SOD, GPx and TAS levels. According to the data, sole onion juice significantly decreased semen MDA level (P < 0.05). Also, a combination between the administration of onion and Zn significantly attenuated sperm MDA (P < 0.05). Sperm GPx level in the co-administration of onion and Zn was significantly altered (P < 0.05). Results suggest that presumably onion juice protects from semen oxidation in rat testes.