scholarly journals Safety evaluation of syringic acid: subacute oral toxicity studies in Wistar rats

Heliyon ◽  
2019 ◽  
Vol 5 (8) ◽  
pp. e02129 ◽  
Author(s):  
Anwarbaig C. Mirza ◽  
Shital S. Panchal
2019 ◽  
Vol 108 ◽  
pp. 104443 ◽  
Author(s):  
M. Clemente ◽  
M.D. Miguel ◽  
K.B. Felipe ◽  
C. Gribner ◽  
P.F. Moura ◽  
...  

2012 ◽  
Vol 31 (1) ◽  
pp. 34-45 ◽  
Author(s):  
Alexander G. Schauss ◽  
R. Glavits ◽  
John Endres ◽  
Gitte S. Jensen ◽  
Amy Clewell

A safety evaluation was performed for EpiCor, a product produced by a proprietary fermentation process using Saccharomyces cerevisiae. Studies included the following assays: bacterial reverse mutation, mouse lymphoma cell mutagenicity, mitogenicity assay in human peripheral lymphocytes, and a cytochrome P450 ([CYP] CYP1A2 and CYP3A4) induction assessment as well as 14-day acute, 90-day subchronic, and 1-year chronic oral toxicity studies in rats. No evidence of genotoxicity or mitogenicity was seen in any of the in vitro or in vivo studies. The CYP assessment showed no interactions or inductions. No toxic clinical symptoms or histopathological lesions were observed in the acute, subchronic, or chronic oral toxicity studies in the rat. Results of the studies performed indicate that EpiCor does not possess genotoxic activity and has a low order of toxicity that is well tolerated when administered orally. The no observable adverse effect level (NOAEL) was 1500 mg/kg body weight (bw)/d for the 90-day study and 800 mg/kg bw/d for the 1 year study, for the highest doses tested.


Author(s):  
Mireille Kameni Poumeni ◽  
Danielle Claude Bilanda ◽  
Paul Désiré Dzeufiet Djomeni ◽  
Yolande Sandrine Mengue Ngadena ◽  
Marguerite Francine Mballa ◽  
...  

AbstractBackgroundLinn (MethodsAqueous extract ofResultsOur findings indicate dose-dependent elevation of nitrites contents in the flowers aqueous extract ofConclusionsdo not possesses neurotoxicity but is able to induce behavioral changes in rats. Therefore, the application of this plant as either drug or supplementary food should be carefully considered.


2014 ◽  
Vol 1 ◽  
pp. 877-884 ◽  
Author(s):  
Job Tchoumtchoua ◽  
Oumarou Riepouo Mouchili ◽  
Sylvin Benjamin Ateba ◽  
Stéphane Zingue ◽  
Maria Halabalaki ◽  
...  

2021 ◽  
Vol 11 ◽  
Author(s):  
Pranay Wal ◽  
Nikita Saraswat ◽  
Ankita Wal ◽  
Rashmi Saxena Pal ◽  
Deepa Maurya

Background: Diabetes mellitus is a disease and endocrine disorder and it's a growing health problem in various countries. The prevalence of diabetes rises worldwide including South Africa 5.4% in 2025 increases as expected. The World Health Organization (WHO) estimated the diabetes mellitus problem in adults 173 million in developing counties. In this research observation of glucose levels indicated the diabetic state in Wistar rats by resulting from Streptozotocin administration and using a Metformin as a standard dose. This study demonstrated the acute oral toxicity and subacute oral toxicity of ethanolic extract of Saraca asoca leaves and Asparagus racemosus roots and showed the antidiabetic activity. Objective: To perform acute toxicity studies and sub-acute toxicity of the polyherbal ethanolic extract on the vital organ and isolated organ and record and noticed the visible changes on organs of each group of Wistar rats. Explore the hypoglycaemic action of the polyherbal extract of Saraca asoca and Asparagus racemosus. Methods: Wistar rats were divided into required groups for toxicity study first is acute oral toxicity 5,50, 300,2000 mg/kg body weight. Subacute oral toxicity studies were performed by administering a 250, 500, 1000mg/kg body weight. For demonstrating the antidiabetic activity the animals divided into 5 groups 1 normal control given saline group 2 standard dose Metformin compulsory dose groups 3 Streptozotocin-Induced diabetic 150mg/kg body weight body weight, groups 4 ethanolic extracts at a 100mg/kg groups 5 ethanolic extract 200mg/kg. On the last day of all the dosing period examined the Blood glucose levels and body weights of rat and histopathology studied were done by animal sacrifice and cut organs such as tissue pancreas, spleen, heart, lungs, liver, and kidney, placed on the slide and done a microscopic examination. Data selection has been complete by research papers from many databases such as NCBI, Web of science and Science direct and PubMed from year 1989 to 2020 by utilize research. skeywords such as “Antidiabetic”, “Saraca indica”, “Asparagus racemosus”, “ethanolic polyherbal extract”, “oral toxicity study”, “histopathology”, “Streptozotocin. Results : The polyherbal ethanolic extract of Saraca asoca and Asparagus racemosus at a dose of 100mg/kg and 200mg/kg was showed better effects against Streptozotocin-Induced diabetic 150mg/kg body weight body weight. All the extracts showed significantly (P <0.05) and it is safe and non-toxic nature by performed a toxicity study acute and subacute oral toxicity and the bodyweight are also improved, no inflammation and erosion are seen on any organs of Wistar rat by demonstrated a histopathology analysis. Conclusions: The polyherbal ethanolic extract of Saraca asoca and Asparagus racemosus showed hypoglycaemic activity against STZ-induced diabetes in experimental Wistar rats in Wistar rats. The results are shown beneficial effects of these ethanolic extract it helps in improving the changes in lipid metabolism, and protect the organs of Wistar rat liver, kidney, spleen, pancreas, lungs, heart against due to impairment of blood glucose and also in body weight. All organs were weighted and cut the tissue of organs and stained from eosin dye and changes observed by microscopy photos. no signs of inflammation and erosion.


2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Ragesh R Nair

The aim of the study was to evaluate the acute oral and sub-acute toxicity of ethanolic root extract of Tetracera akara in Swiss albino mice and Wistar rats. Tetracera akara (Burm. f.) Merr. has been used as traditional medicine by the Kani tribe of Kerala to cure liver diseases. In acute toxicity studies, four groups of mice (n = 5/group/sex) were orally treated with doses of 0.625 g, 1.25 g, 2.5 g and 5.0 g/kg and mortality were recorded. In the sub-acute toxicity study, animals received T. akara extract at the doses of 0.1 g, 0.5 g and 2.5 g/kg/day (n = 5/group/sex) for 28 days, biochemical, hematological, morphological and histopathological parameters were determined. T. akara did not produce any mortality in the acute toxicity studies, showing LD50 higher than 5 g/kg. Sub-acute treatment with T. akara didn’t cause any changes in body weight gain, hematological, biochemical profiles when compared to normal control. In addition, no changes in morphological and histopathological aspect of organs were observed in the animals. Taking all factors into consideration, administration of Tetracera akara does not produce acute toxicity in Swiss albino mice or sub-acute toxicity in Wistar rats, suggesting it’s safe use by humans.


PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243647
Author(s):  
Andreas Kern ◽  
Diane Shanahan ◽  
Roland Buesen ◽  
Dominik Geiger

Mannanase 19287 enzyme is an engineered β-mannanase that can be added to diets for animals raised for human consumption to hydrolyze β-mannans. Established toxicological analyses were conducted with the enzyme preparation to ensure the safety of this product for the intended use. The mannanase 19287 preparation was produced with Thermothelomyces thermophilus strain DSM 33149. In vitro toxicity studies presented here used dosages of the mannanase 19287 test articles up to 5000 μg/plate. For in vivo toxicity studies in Wistar rats, test articles were administered at 5.1 mg/L for inhalation toxicity and up to 15,000 mg/kg rat feed for oral toxicity, based on the Total Organic Solids (TOS) content in each test article. No treatment related adverse effects were reported in any study. The No Observed Adverse Effect Levels in the high dose group of the subchronic oral toxicity study were calculated as 1117–1298 mg TOS/kg bw/day in rats. Comparing these values to an Estimated Daily Intake for poultry demonstrated safety factors larger than 5000. Our results confirm that T. thermophilus fulfills the recognized safety criteria for the manufacture of food enzyme preparations and represent the first peer-reviewed safety evaluation of an enzyme preparation by T. thermophilus. The results of the toxicity studies presented herein attest to the safety of the mannanase 19287 enzyme for its intended use.


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