scholarly journals Acute and Subchronic Toxicity Study ofEuphorbia hirtaL. Methanol Extract in Rats

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Kwan Yuet Ping ◽  
Ibrahim Darah ◽  
Yeng Chen ◽  
Subramaniam Sreeramanan ◽  
Sreenivasan Sasidharan
Keyword(s):  
Body Weight ◽  
Toxicity Study ◽  
Morphological Alteration ◽  
Control Group ◽  
Sprague Dawley ◽  
Oral Toxicity ◽  
Methanolic Extracts ◽  
Sprague Dawley Rats ◽  
Significant Difference

DespiteEuphorbia hirtaL. ethnomedicinal benefits, very few studies have described the potential toxicity. The aim of the present study was to evaluate thein vivotoxicity of methanolic extracts ofE. hirta. The acute and subchronic oral toxicity ofE. hirtawas evaluated in Sprague Dawley rats. The extract at a single dose of 5000 mg/kg did not produce treatment related signs of toxicity or mortality in any of the animals tested during the 14-day observation period. Therefore, the LD 50 of this plant was estimated to be more than 5000 mg/kg. In the repeated dose 90-day oral toxicity study, the administration of 50 mg/kg, 250 mg/kg, and 1000 mg/kg/day ofE. hirtaextract per body weight revealed no significant difference (P>0.05) in food and water consumptions, body weight change, haematological and biochemical parameters, relative organ weights, and gross findings compared to the control group. Macropathology and histopathology examinations of all organs including the liver did not reveal morphological alteration. Analyses of these results with the information of signs, behaviour, and health monitoring could lead to the conclusion that the long-term oral administration ofE. hirtaextract for 90 days does not cause sub-chronic toxicity.

scholarly journals A 4-Week Repeated-Dose Oral Toxicity Study of Bojungikgi-Tang in Crl:CD Sprague Dawley Rats

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Sae-Rom Yoo ◽  
Hyekyung Ha ◽  
Mee-Young Lee ◽  
Hyeun-Kyoo Shin ◽  
Su-Cheol Han ◽  
...  
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Serum Biochemistry ◽  
Toxicity Study ◽  
Repeated Dose ◽  
Sprague Dawley ◽  
Oral Toxicity ◽  
Organ Weights ◽  
Sprague Dawley Rats ◽  
Dose Oral

Traditional herbal medicines have been used for centuries in Asian countries. However, recent studies have led to increasing concerns about the safety and toxicity of herbal prescriptions. Bojungikgi-tang (BJIGT), a herbal decoction, has been used in Korea to improve physical strength. To establish the safety information, BJIGT water extract was evaluated in a 4-week repeated-dose oral toxicity test in Crl:CD Sprague Dawley rats. BJIGT was orally administered in daily doses of 0, 500, 1000, and 2000 mg/kg/day for 4 weeks via oral gavage in male and female rats. We examined the mortality, clinical signs, body weight change, food intake, organ weights, hematology, serum biochemistry, and urinalysis parameters. No significant changes were observed in mortality, clinical sings, body weight, food intake, organ weights, hematology, serum biochemistry, and urinalysis parameters between the control group and the BJIGT-treated groups in the rats of both sexes. The results indicate that BJIGT did not induce toxic effects at a dose level up to 2000 mg/kg in rats. Thus, this concentration is considered the nonobservable effect dose in rats and is appropriate for a 13-week subchronic toxicity study.

Pharmacokinetics of bio-shell-silver-core nanoparticles (AgNP) in Sprague-Dawley Rats – In vivo study

2021 ◽  
Vol 09 ◽  
Author(s):  
Asra Parveen ◽  
Vijay kumar B. Malashetty ◽  
Sushruta Marla ◽  
Shanth Reddy ◽  
Sidramappa Sirsand ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Body Weight ◽  
Biomedical Applications ◽  
Female Rats ◽  
Control Group ◽  
Sprague Dawley ◽  
Potential Toxicity ◽  
Target Organs ◽  
Sprague Dawley Rats

Background: Silver nanoparticles have been widely used in the field of nanomedicine. A comprehensive understanding of their pharmacokinetics is crucial for proper risk assessment and safe biomedical applications. Objectives: The purpose of this study was to investigate the safety of silver nanoparticles by determining its potential toxicity following 28 days administration in Sprague Dawley rats. Method: The silver nanoparticles were administered by intravenous injection at the doses of 100, 200 and 500 µg/kg body weight for 28 consecutive days. Animals in the control group were received sterile water for injection. Each group consists of 10 male and 10 female rats. Results: No treatment related effects were seen in any of the parameters monitored in rats given 100, 200 and 500 µg/kg body weight/day of silver nanoparticles. Conclusion: The study proved that the use of up to 500 µg/kg body weight biosynthesized silver nanoparticles have no toxic effect in the target organs and found safe. However, the safety of the nanoparticles might be attributed to the covering of biological moieties on nanoparticles. Hence, the biofunctionalized nanoparticles can be safely used by selecting the required size and dose in medicines and drug delivery systems.

scholarly journals In Vitro and In Vivo Toxicity Studies on Cymbopogon giganteus Chiov. Leaves Essential Oil from Benin

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Habib Toukourou ◽  
Francine Uwambayinema ◽  
Yousof Yakoub ◽  
Birgit Mertens ◽  
Anatole Laleye ◽  
...  
Keyword(s):  
Single Dose ◽  
Essential Oil ◽  
Salmonella Typhimurium ◽  
Toxicity Study ◽  
Control Group ◽  
Inhalation Toxicity ◽  
Oral Toxicity ◽  
African Countries ◽  
Significant Difference

Cymbopogon giganteus Chiov. (Poaceae) is a medicinal plant used to treat various diseases in traditional medicine in several African countries. The present study aims to evaluate the oral and inhalation toxicity as well as the mutagenic effects of the essential oil of Cymbopogon giganteus leaves (EOCG) from a sample collected in Benin. Mutagenic potential was assessed by the Ames test using Salmonella typhimurium strains TA98 and TA100. Oral acute toxicity was carried out by administration of a single dose of 2000 mg/kg b.w. to Wistar rats while oral subacute toxicity was assessed by daily administration of 50 and 500 mg/kg of EOCG for 28 days. Finally, inhalation toxicity was assessed by administration of a single dose of 0.125%, 0.5%, 2% or 5% v/v of EOCG emulsions in 0.05% v/v lecithin solution in sterile water for the first experiment, and in a second one by administration of single dose of 0.125% or 0.5% v/v. A broncho-alveolar lavage was performed after 3 h or 24 h, respectively. The results show that EOCG is not mutagenic on Salmonella typhimurium strains at the highest concentration tested (200 μg/plate). In the acute oral toxicity study, EOCG induce neither mortality nor toxicity, showing that the LD50 is greater than 2000 mg/kg. The subacute oral toxicity study at both doses did not show any significant difference in body weight, relative organ weight, hematological and/or biochemical parameters or histopathology as compared to the control group. EOCG induced mortality and inflammation in lungs 3 h after administration of a single dose of 5% or 2% v/v. Single doses of 0.125% or 0.5% v/v did not induce inflammation, cell recruitment nor cytotoxicity in lungs 3 h or 24 h after administration, suggesting safety at these concentrations. This first report on the in vivo toxicity will be useful to guide safe uses of EOCG.

Safety Assessment of High-Purity, Synthetic Nicotinamide Riboside (NR-E) in a 90-Day Repeated Dose Oral Toxicity Study, With a 28-Day Recovery Arm

2020 ◽  
Vol 39 (4) ◽  
pp. 307-320 ◽  
Author(s):  
Anca G. Marinescu ◽  
Jayson Chen ◽  
Holly E. Holmes ◽  
Leonard Guarente ◽  
Odete Mendes ◽  
...  
Keyword(s):  
Body Weight ◽  
High Purity ◽  
Safety Assessment ◽  
Toxicity Study ◽  
Sprague Dawley ◽  
Vitamin B3 ◽  
Oral Toxicity ◽  
Nicotinamide Riboside ◽  
Age Related ◽  
Sprague Dawley Rats

Nicotinamide riboside (NR) is a naturally occurring form of vitamin B3 shown to preferentially elevate the nicotinamide adenine dinucleotide (NAD+) metabolome compared to other vitamin B3 forms (nicotinic acid and nicotinamide). Although daily requirements of vitamin B3 are typically met through the diet, recent studies have shown that additional supplementation with NR may be an effective method to counter the age-related decline in NAD+ levels as NR bypasses the rate-limiting step in NAD+ biosynthesis. Furthermore, pharmaceutical applications of NR for age-related disorders have been proposed. In this study, the safety of a high-purity, nature-identical, synthetic NR (NR-E), manufactured under the guidelines of good manufacturing practices for dietary supplements (21 CFR 111) as well as for drugs (21 CFR 210), was investigated in a 90-day oral toxicity study in Sprague Dawley rats at 300, 500, and 1,200 mg/kg/d. There were no mortality or clinical observations attributable to the test substance at any dose. A small but statistically significant decrease in body weight was observed at day 92 in the 1,200 mg/kg/d NR-treated male rats only. In contrast to a previously published safety assessment using a different synthetic NR (NIAGEN), whose no-observed-adverse-effect-level (NOAEL) was reported to be 300 mg/kg/d, there were no adverse changes in clinical pathology parameters and no notable macroscopic or microscopic findings or treatment-related effects at similar doses. In the current study, the NOAEL for systemic toxicity of NR-E in Sprague-Dawley rats was conservatively determined to be 500 mg/kg/d for males (solely based on body weight) and 1,200 mg/kg/d for females.

Safety Assessment of a Hydroethanolic Extract of Caralluma fimbriata

2013 ◽  
Vol 32 (5) ◽  
pp. 385-394 ◽  
Author(s):  
Antoinette Y. Odendaal ◽  
Narendra S. Deshmukh ◽  
Tennille K. Marx ◽  
Alexander G. Schauss ◽  
John R. Endres ◽  
...  
Keyword(s):  
Developmental Toxicity ◽  
Toxicity Study ◽  
Developmental Study ◽  
Sprague Dawley ◽  
Oral Toxicity ◽  
Toxicological Assessment ◽  
Sprague Dawley Rats ◽  
Chromosomal Aberration Test ◽  
Hydroethanolic Extract

This toxicological assessment evaluated the safety of a hydroethanolic extract prepared from Caralluma fimbriata (CFE), a dietary supplement marketed worldwide as an appetite suppressant. Studies included 2 in vitro genotoxicity assays, a repeated dose oral toxicity study, and a developmental study in rats. No evidence of in vitro mutagenicity or clastogenicity surfaced in the in vitro studies at concentrations up to 5000 μg of extract/plate (Ames test) or 5000 μg of extract/mL (chromosomal aberration test). No deaths or treatment-related toxicity were seen in the 6-month chronic oral toxicity study in Sprague-Dawley rats conducted at 3 doses (100, 300, and 1000 mg/kg body weight (bw)/d). The no observed effect level for CFE in this study was considered to be 1000 mg/kg bw/d. A prenatal developmental toxicity study conducted at 3 doses (250, 500, and 1000 mg/kg bw/d) in female Sprague-Dawley rats resulted in no treatment-related external, visceral, or skeletal fetal abnormalities, and no treatment-related maternal or pregnancy alterations were seen at and up to the maximum dose tested. CFE was not associated with any toxicity or adverse events.

scholarly journals A 90-Day Oral Toxicity of Hydroethanolic Root Extract of Carissa spinarum in Wistar Rats

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Komlan M. Dossou-Yovo ◽  
Aboudoulatif Diallo ◽  
Povi Lawson-Evi ◽  
Yendubé T. Kantati ◽  
Tchin Darré ◽  
...  
Keyword(s):  
Body Weight ◽  
Biochemical Parameters ◽  
Wistar Rats ◽  
Hematological Parameters ◽  
Relative Weight ◽  
Control Group ◽  
Root Extract ◽  
Weight Changes ◽  
Oral Toxicity ◽  
Significant Difference

Background. Herbal medication is a worldwide and ancient practice, mostly in developing countries, where a large part of the population is involved in this practice. Hence, studies must be conducted to evaluate their safety and efficiency to avoid or prevent toxicological risks due to their usage. In Togo, Carissa spinarum is a medicinal plant belonging to Apocynaceae family, used as an aphrodisiac or to heal some ailments including malaria, sickle cell anemia, hypertension, pain, and asthma. Notwithstanding its several ethnomedicinal benefits, just a few toxicological data associated with its chronic use are available. Objective. Therefore, this study aims to assess the toxicity of an ethanolic root extract of Carissa spinarum in Wistar rats. Methods. The 90-day oral toxicity process following OECD TG 408 guidelines is used. Male Wistar rats received Carissa spinarum root hydroethanolic extract at 500 and 1000 mg/kg for 90 days by oral gavage. Body weight changes, hematological and blood biochemical parameters, organ weight changes, malondialdehyde as a lipoperoxidation marker expressed according to tissue proteins, and histopathology of vital organs were assessed. Results. No signs of toxicity or mortality were observed during the 90 days experiment. Hematological parameters have not shown any treatment-related abnormalities. According to biochemical parameters, an increase in the chloride ion level was observed at 1000 mg/kg p < 0.01 . There was no significant difference between the treated groups and the control group concerning the malondialdehyde concentration, body weight, and organ relative weight. No changes in necropsy and histopathology of vital organs associated with extract treatment were observed. Conclusion. The results indicated that an ethanolic root extract of Carissa spinarum does not cause adverse effects, which can lead to Wistar rats’ death after 90-day oral administration at 500 and 1000 mg.

4-Week repeated dose oral toxicity study of N-ethyl-2-pyrrolidone in Sprague Dawley rats

2016 ◽  
Vol 81 ◽  
pp. 275-283 ◽  
Author(s):  
A.M. Saillenfait ◽  
F. Marquet ◽  
J.P. Sabaté ◽  
D. Ndiaye ◽  
A.M. Lambert-Xolin
Keyword(s):  
Toxicity Study ◽  
Repeated Dose ◽  
Sprague Dawley ◽  
Oral Toxicity ◽  
Sprague Dawley Rats ◽  
Dose Oral

SUBCHRONIC TOXICITY OF MALAYSIAN ACALYPHA INDICA: BIOCHEMISTRY AND HAEMATOLOGY ANALYSIS OF RAT

2016 ◽  
Vol 78 (5-5) ◽  
Author(s):  
Norazlanshah Hazali ◽  
Nurul Nadia Mohd Nazri ◽  
Muhammad Ibrahim ◽  
Mashita Masri
Keyword(s):  
Body Weight ◽  
Skin Diseases ◽  
Female Rats ◽  
Control Group ◽  
Dosage Group ◽  
Sprague Dawley ◽  
Subchronic Toxicity ◽  
High Dosage Group ◽  
Sprague Dawley Rats ◽  
Acalypha Indica

Acalypha indica is one of the medicinal plants that have been used since ages to treat various diseases such as pneumoniae, asthma and skin diseases. This study aimed to explore the subchronic toxicity effect of Acalypha indica on Sprague Dawley rats based on haematological and biochemical parameters. The extract of Acalypha indica was prepared by aqueous extraction technique. 48 Sprague Dawley rats aged 7 weeks, weighing 150-200g were randomly divided into four groups, 6 animals per gender. A control group received water vehicle while three treated groups received the extract at dosage of 100 (low dosage group), 200 (medium dosage group) and 300 (high dosage group) mg/kg body weight. The sample was administered orally by using oral gavage daily for 90 days. No sign of toxicity and mortality was recorded in all groups throughout the study. There were no significant different (p>0.05) in body weight gain, food and water intake between control and treatment group. However, there was significant different in uric acid between control and high dosage group of male and female rats but the mean were in normal range. There were also reduced in mean of urea and creatinine in all dosage group of male and urea for all dosage group of female. Statistically significant reduced in urea was recorded between control and high dosage group of male only. Other parameters showed no significant different between control and treatment groups. Therefore, Acalypha indica is safe for human consumption and might be potential in reducing kidney damage problem.

Physicochemical analysis and repeated-dose 90-days oral toxicity study of nanocalcium carbonate in Sprague-Dawley rats

2014 ◽  
Vol 9 (5) ◽  
pp. 603-612 ◽  
Author(s):  
Jae Hyuck Sung ◽  
Soo Jin Park ◽  
Min Sook Jeong ◽  
Kyung Seuk Song ◽  
Kyu Sup Ahn ◽  
...  
Keyword(s):  
Physicochemical Analysis ◽  
Toxicity Study ◽  
Repeated Dose ◽  
Sprague Dawley ◽  
Oral Toxicity ◽  
Sprague Dawley Rats

Portal hypertension increases vasoconstrictor responsiveness of rat aorta

1999 ◽  
Vol 96 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Claire CONNOLLY ◽  
Teresa CAWLEY ◽  
P. Aiden MCCORMICK ◽  
James R. DOCHERTY
Keyword(s):  
Portal Hypertension ◽  
Wistar Rats ◽  
Rat Aorta ◽  
Maximum Response ◽  
Sprague Dawley ◽  
Portal Vein Stenosis ◽  
Sprague Dawley Rats ◽  
Significant Difference ◽  
Hepatic Portal

We have examined the effects of pre-hepatic portal hypertension on the responsiveness of aorta from Wistar and Sprague–Dawley rats. Rats were made portal hypertensive by creating a calibrated portal vein stenosis, or sham operated. In rat aorta, there was no significant difference between portal hypertensive and sham-operated animals in the contractile potency of KCl, noradrenaline or phenylephrine. In aortas from Wistar rats, the maximum response to KCl (0.71±0.12 ;g) and noradrenaline (1.00±0.17 ;g) but not phenylephrine (0.86±0.10 ;g) in portal hypertensive animals was significantly increased compared with that in sham-operated animals (0.45±0.04 ;g, 0.57±0.07 ;g, 0.71±0.05 ;g respectively). In aortas from Sprague–Dawley rats, the maximum response to KCl (1.21±0.21 ;g) and phenylephrine (1.54±0.30 ;g) but not noradrenaline (0.93±0.09 ;g) in portal hypertensive animals was significantly increased compared with that in sham-operated animals (0.59±0.09 ;g, 0.76±0.11 ;g, 1.04±0.10 ;g respectively). There was no difference between portal hypertensive and sham-operated Wistar rats in the affinity or maximum number of binding sites for [3H]prazosin to α1-adrenoceptors in cardiac ventricular membranes. It is concluded that portal hypertension tends to produce an increase rather than a decrease in the contractile response to vasoconstrictors in aorta from both Wistar and Sprague–Dawley rats. This suggests that the diminished responsiveness to vasoconstrictors reported in portal hypertensive rats in vivo is not due to a diminished responsiveness at the level of the vascular smooth muscle.

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