Corticosterone Modulates Acute Toxicity of 2,3,7,8-Tetrachlorodibenzo-p-1 dioxin (TCDD) in Male Sprague—Dawley Rats

Objective: The plant mahkota dewa (Phaleria macrocarpa) is known to have anti-inflammatory effects. This study aimed to determine whetherchitosan nanoparticles containing mahkota dewa leaf extract would yield superior anti-inflammatory effects in the colon of a mouse model of dextransodium sulfate (DSS)-induced ulcerative colitis, compared with ethanol extract alone after testing the acute toxicities (lethal dose) of both preparations.Methods: For acute toxicity testing, 10 Sprague-Dawley rats were administered 6000 mg/kg body weight (BW) of leaf extract alone or with nanoparticles.Subsequently, mice were divided into the following six groups to determine the anti-inflammatory effects: Untreated, negative control (DSS 2% w/v), leafextract at 12.5 or 25 mg/kg BW, and leaf extract in chitosan nanoparticles at 6.25 or 12.5 mg/kg BW. To induce colitis, DSS (2% w/v) was administeredthrough drinking water for 6 weeks. The anti-inflammatory effect was observed histopathologically by imaging the inflammatory cells of the mice colonwith hematoxylin-eosin (HE) staining.Results: For acute toxicity testing, 10 Sprague-Dawley rats were administered 6000 mg/kg BW of leaf extract alone or with nanoparticles. Subsequently,mice were divided into the following six groups to determine the anti-inflammatory effects: Untreated, negative control (DSS 2% w/v), leaf extract at12.5 or 25 mg/kg BW, and leaf extract in chitosan nanoparticles at 6.25 or 12.5 mg/kg BW. To induce colitis, DSS (1% w/v) was administered throughdrinking water for 6 weeks. The anti-inflammatory effect was observed histopathologically by imaging the inflammatory cells of the mice colon withHE staining.Conclusion: Chitosan nanoparticles containing mahkota dewa leaf extract can be included in the practically non-toxic class of materials. However, anethanol extract of mahkota dewa leaf effectively inhibited DSS-induced inflammation in the mouse colon, regardless of delivery vehicle.

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Safety and Effectiveness of Mist Antiaris, a Herbal Preparation for Treatment of Peripheral Neuropathy

BioMed Research International ◽

10.1155/2019/2607872 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10

Author(s):

S. Antwi ◽

J. Asiedu-Larbi ◽

O. N. K. Martey ◽

O. Quasie ◽

M. Boakye-Yiadom ◽

...

Keyword(s):

Body Weight ◽

Peripheral Neuropathy ◽

Acute Toxicity ◽

Oral Dose ◽

Hematological Parameters ◽

Kidney Tissue ◽

Control Group ◽

Sprague Dawley ◽

Sleeping Time ◽

Sprague Dawley Rats

Mist Antiaris is a herbal decoction for treatment of nervous disorders. Safety and efficacy were evaluated in Sprague-Dawley rats and human patients, respectively. Acute toxicity was assessed by administration of a single 5000 mg/kg oral dose of decoction to a group of six rats. For subchronic toxicity, four groups of six rats each received water (control) or 10, 100, or 200 mg/kg oral doses of decoction daily for eight weeks. Body weight, serum, urine, and hematological profile of the animals in each group were monitored over the period. Effects of treatment on pentobarbital-induced sleeping time and histology of liver, lung, heart, and kidney tissue were assessed at the end of the study. There was no evidence of acute toxicity within 48 hours of the oral dose. Over the 8-week period, body weight increases in Mist Antiaris treatment groups were reduced relative to the control group. There were no significant differences in urine profile, serum biochemistry, hematological parameters, and pentobarbital-induced sleeping time. Tissue histology revealed no differences relative to controls. Assessment of efficacy was by retrospective review of data on patients who presented with peripheral neuropathy. Treatment resulted in 53.7 % of patients reporting complete resolution and 15.7 % showing reduction in neuropathic symptoms. The data demonstrate that there is no toxicity due to subchronic administration of Mist Antiaris in Sprague-Dawley rats. The reduction or resolution of neuropathic symptoms indicated by patents’ file data provides evidence to suggest that Mist Antiaris has antineuropathic effects.

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