Glucoregulatory effect of butyrate is associated with elevated circulating VEGF and reduced cardiac lactate in high fructose fed rats

Background

High fructose diet has been linked with impaired body metabolism and cardiovascular diseases. Sodium butyrate (NaB) was documented to improve glucoregulation and cardiometabolic problems associated with high fructose diet (HFrD) but the mechanisms behind it are unclear. As a result, the purpose of this study was to look into the effects of NaB on VEGF and cardiac lactate in HFrD-induced dysmetabolism.

Methods

Twenty male Wistar rats of weight 130-140 g were assigned randomly after a week of acclimation into four groups: Control diet (CTR), High fructose drink (HFrD); 10 % (w/v), NaB (200 mg/kg bw), and HFrD + NaB (200 mg/kg bw). The animals were induced to be unconscious with 50 mg/kg of pentobarbital sodium intraperitoneally, blood samples were taken via cardiac puncture and cardiac tissue homogenates were obtained for Fasting Blood Sugar (FBS) and plasma insulin, cardiac glycogen, plasma and cardiac glycogen synthase, plasma and cardiac nitric oxide as well as vascular endothelial growth factor (VEGF).

Result

HFrD resulted in statistical elevation body and cardiac weight, plasma glucose, plasma insulin, cardiac lactate, glycogen and decreased nitric oxide level (NO) when compared with the control group. Administration of NaB reduced cardiac weight, blood glucose, plasma insulin, cardiac lactate while nitric oxide and glycogen increased (P < 0.05). NaB increased plasma glycogen synthase in normal rats, plasma and cardiac circulating VEGF in HFrD administered rats (P < 0.05) while no change was produced in plasma and cardiac glycogen synthase level of HFrD treated rats.

Conclusion

Sodium butyrate improves glucoregulation by reducing cardiac lactate and increasing circulating VEGF in HFrD-treated rats.

The effect of ginger (Zingiber officinale) feed on cardiac biomarker in medium-dose isoproterenol-induced myocardial toxicity

OBJECTIVE

Traditional medicines have been widely used to prevent and treat diseases for thousands of years. This study was designed to evaluate the effect of ginger feed on cardiac biomarker in isoproterenol (ISO)-induced myocardial toxicity.

MATERIALS AND METHODS

Thirty male Wistar rats were grouped into six groups of five: Control; ISO-induced toxicity; ginger fed; ginger fed before; ginger fed+ ISO simultaneously and ginger fed after. Freshly prepared solution of ISO was injected through intraperitoneal route at a dosage of 20 mg/kg, while the control received distilled water. Blood was collected via cardiac puncture after two weeks of administration, the serum was used to evaluate biomarkers.

RESULTS

The CK-MB and CK of ginger-fed groups were significantly lower compared to ISO group- 8.2±0.5 U/L and 39.36±5.28 U/L respectively, P <0.05. The CK-MB and CK levels of all ginger-fed groups showed no significant difference compared to the control- 2.2±0.3 U/L and 17. 07±3.4.90 U/L, respectively p>0.05, except ginger fed after group where they were significantly higher compared to the control. The mean value of LDH in all ginger-fed groups was lower than the ISO group (67.17±0.88 U/L; p<0.05), but significantly higher (p<0.05) than the control (26.45±2.52 U/L). The mean value of ALT in all ginger fed groups was lower than the ISO group (83.11±4.88U/L; p≤0.05).

CONCLUSION

Ginger feed hindered toxic effects of isoproterenol.

Methanol extracts of Basella alba leaves alleviate stress in rats

Objective

Stress is becoming an unavoidable threat in recent times, there has been increasing interest by researchers in the use of naturally occurring biologically active compounds with medicinal value to cure body ailments. The present work was carried out to investigate the effect of methanol extract of Basella alba leaves on stress in Wistar rats (Rattus norvegicus).

Methods

A total of 35 male rats were used in this study. They were grouped into seven groups of five rats each. Group 1 (normal control) was received 10 mL/kg normal saline. Group 2 contained restraint stress rats only. Group 3 contained forced swim stress rats only. Group 4 and 5 were treated with 60 mg/kg of B. alba extract (BAE) thereafter subjected to restraint and forced swim stresses respectively. Group 6 and 7 were treated with 120 mg/kg of BAE thereafter subjected to restraint and forced swim stresses respectively. Stress procedures were carried out at the end of first and third weeks.

Results

In the stressed rats, there were significant increases (P < 0.05) in fasting blood glucose and white blood cell count while there were significant decreases in superoxide dismutase activity and glutathione concentration when compared to group 1. There were significant decreases (P < 0.05) in blood glucose and white blood cell count and significant increases in superoxide dismutase and glutathione concentrations in BAE treated rats when compared to group 2 and 3. Some of the significant differences were either dose or duration dependent.

Conclusion

In conclusion, results from this research suggest that BAE alleviates hyperglycaemia, chronic activation of immune system and generation of free radicals due to stress in Wistar rats.

Methanol extract of Cola nitida ameliorates inflammation and nociception in experimental animals

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Methanol extract Cola nitida possesses analgesic properties in mice.

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Methanol extract of Cola nitida showed anti-inflammatory activity.

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Methanol extract of cola nitida mediates its nociceptive action through cholinergic pathway.

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Opioid and beta adrenergic pathways do not mediate the analgesic potential of Cola nitida.

Methanol extract of Cola nitida (MECN) was evaluated for its anti-inflammatory and analgesic activities using rats and mice. Inflammatory activity of MECN was assessed by carrageenan-induced paw oedema while analgesic activity was evaluated by acetic acid –induced writhing and formalin paw lick test. Histological analyses of the paws were also carried out. There was evaluation of the mechanism(s) of action of MECN using naloxone, a blocker of opioid receptors; atropine, blocker of muscarinic receptors; and propranolol, blocker of beta adrenergic receptors. Findings from the study revealed that MECN has both anti-inflammatory and analgesic properties. These properties were found to be dose dependent with 200 mg/kg of MECN discovered to be the most potent dose. 200 mg/kg was able to cause statistically significant reduction in paw size (p < 0.001) when compared with the carrageenan group. Histological analysis revealed that rats treated with 200 mg/kg of MECN showed no inflammatory cells in the left paw compared to other groups treated with carrageenan. In the formalin test, the number of paw licking was significantly reduced by MECN at 50 mg/kg, 100 mg/kg and 200 mg/kg in both neurogenic and inflammatory pain responses (p < 0.001) even as 200 mg/kg showed the highest percentage inhibition of 98.17% while 100 mg/kg of aspirin showed percentage inhibition of 93.66%. In acetic acid-induced writhing test, 50 mg/kg, 100 mg/kg and 200 mg/kg of MECN produced significant inhibition of writhes when compared with control as highest inhibition is observed in mice that received 200 mg/kg which is similar to aspirin. Administration of propranolol and naloxone was unable to reverse the analgesic function of MECN. However, atropine administration blocked the analgesic function of MECN. This shows that MECN exhibits its analgesic property through cholinergic pathway and not opioid and adrenergic pathways. Phytochemical screening revealed that MECN contains flavonoids, steroids, saponins, tannins, anthraquinines, terpenoids, and alkanoids. These phytochemical contents may thus be responsible for its analgesic and anti-inflammatory properties.