• 동의생리병리학회지
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• 제22권6호
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• pp.1439-1443
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• 2008

The objective of this study was to evaluate the acute toxicity of Taeumjowi-tang in rats. SPF Sprague-Dawley male and female rats were administered orally with Taeumjowi-tang extract of 2,500 mg/kg(low dosage group), and 5,000 mg/kg(high dosage group). We daily examined number of deaths, clinical signs, body weights and gross findings for 14 days. No dead animal and no significant changes of body weights were found during the experimental period. In addition, no differences were found between control and treated groups in clinical signs, hematology, serum biochemistry, and other findings. In conclusion, Taeumjowi-tang extract did not show any toxic effects, and oral LD50 value was over 5,000 mg/kg in SD rats.

• Genomics & Informatics
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• 제14권4호
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• pp.230-233
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• 2016

Linkage disequilibrium (LD) is the non-random association between the loci and it could give us a preliminary insight into the genetic history of the population. In the present study LD patterns and effective population size (Ne) of three Korean cattle breeds along with Chinese, Japanese and Mongolian cattle were compared using the bovine Illumina SNP50 panel. The effective population size (Ne) is the number of breeding individuals in a population and is particularly important as it determines the rate at which genetic variation is lost. The genotype data in our study comprised a total of 129 samples, varying from 4 to 39 samples. After quality control there were ~29,000 single nucleotide polymorphisms (SNPs) for which $r^2$ value was calculated. Average distance between SNP pairs was 1.14 Mb across all breeds. Average $r^2$ between adjacent SNP pairs ranged between was 0.1 for Yanbian to 0.3 for Qinchuan. Effective population size of the breeds based on $r^2$ varied from 16 in Hainan to 226 in Yanbian. Amongst the Korean native breeds effective population size of Brindle Hanwoo was the least with Ne = 59 and Brown Hanwoo was the highest with Ne = 83. The effective population size of the Korean cattle breeds has been decreasing alarmingly over the past generations. We suggest appropriate measures to be taken to prevent these local breeds in their native tracts.

• 동의생리병리학회지
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• 제22권4호
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• pp.762-765
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• 2008

Ephedrae herba(Ma-huang) has been used to treat respiratory conditions for over 5,000 years. The early 1990s, the herbal ephedra and other products containing ephedrine began to be promoted as weight loss aids in United States. The objective of this study was to evaluate the acute toxicity of hebal ephedra in rats. SPF Sprague-Dawley male and female rats were administered orally with herbal ephedra extract of 2,500 mg/kg(low dosage group), and 5,000 mg/kg(high dosage group). We daily examined number of deaths, clinical signs, body weights and gross findings for 14 days. No dead animal and no significant changes of body weights were found during the experimental period. In addition, no differences were found between control and treated groups in clinical signs, hematology, serum biochemistry, and other findings. In conclusion, herbal ephedra extract did not show any toxic effects and oral LD50 value was over 5,000 mg/kg in SD rats.

• 대한한방부인과학회지
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• 제23권4호
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• pp.47-56
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• 2010

Purpose: This study was performed to evaluate the single dose oral toxicity of Gwibi-tang extract in ICR mice. Methods: 0(control group), 1250, 2500 and 5000 mg/kg of Gwibi-tang extracts were orally administered to 20 male and 20 female ICR mice. After single oral administration of Gwibi-tang extract to ICR mice, we observed number of the death, clinical signs, changes of body weights for 14 days. After 14 day of Gwibitang extract administration, all mice were sacrificed and major organs were observed. Results: Compared with the control group, we could not find any toxic signs in the mortalities, clinical signs, body weight changes, necropsy findings and hematological values in all treated groups(1250, 2500 and 5000 mg/kg). Conclusions: $LD_{50}$ value of Gwibi-tang extracts may be over 5000 mg/kg and it may have no side toxic effect to ICR mice.

• 대한수의학회지
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• 제11권2호
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• pp.105-116
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• 1971

The effects of aconite root in rats and rabbits were studied following oral administration of the powder which was prepared by lyophilization of the decoction of the salted aconite roots. The $LD_{50}$ of the powder, the blood picture, total blood volume, uptake rate of ${42}^K$ and ${24}^Na$ in various organs, oxygen consumption, thyroid activity, and histopathological changes in various organs, were observed. The results obtained were as follows: 1. The $LD_{50}$ of the powder of decoction of the aconite root was 4.07g/kg of body weight in mice which is equivalent to approximately 40g/kg of the salted aconite roots. 2. The number of erythrocytes and leukocytes, hematocrit value, and the amount of hemoglobin in blood were increased in the rats administered daily dosages of 0.1, 0.5, and 1.0g/kg respectively. No significant differences were observed in the differential count of leukocytes. A slight tendency of hemoconcentration was recognized. 3. No changes in the erythrocyte volume, plasma volume and total blood volume were observed in the rats after administration of the powder for one, three, and six days. However, those were decreased in rats treated for ten days. 4. Generally, in various organs of rats the uptake rate of ${24}^Na$ showed a tendency of increasing but that of ${42}^K$ slowed a decreasing tendency. 5. The oxygen consumption was markedly decreased in rats administered the powder. 6. Iodine-131 uptake of thyroid gland was markedly decreased in the rabbits following administration of the powder. 7. In rabbits administered 0.5g/kg for 20 days, fatty changes of hepatic cells, cloudy swelling of the epithelial cells of proximal convoluted tubules of the kidney and the dilation of splenic sinuses were observed, however, milder changes were found in rabbits treated with 0.1g/kg for the same period.

• 약학회지
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• 제34권2호
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• pp.126-132
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• 1990

To enhance the activity of ibuprofen, amides of ibuprofen, 1-piperazinyl-2-(4-isobutylphenyl)propionamide(Ibu-P.A.) and 1-(4-methylpiperazinyl)-2-(4-isobutylphenyl)propionamide (Ibu-M.P.), were synthesized and the pharmaceutical properties and the pharmacological activities of the amides were studied. The lipid:water partition coefficients and pKa values were examined in vitro, and the antiinflammatory effect, analgesic effects, acute toxicity, and intestinal absorption were studied for the amides and compared with ibuprofen in vivo. The results are summarized as belows; 1) The lipid:water partition coefficients of Ibu-M.P. were higher than those of ibuprofen. 2) The calculated pKa values of ibuprofen and Ibu-M.P. were 5.49 and 8.66, respectively. 3) The antiinflammatory effects of ibuprofen, Ibu-P.A., and Ibu-M.P. were same intensity, but the duration of the effects of Ibu-P.A. and Ibu-M.P. were longer than that of ibuprofen. 4) The analgesic effect of Ibu-M.P. was more potent than those of ibuprofen and Ibu-P.A. in the acetic acid-induced writhing test. 5) The $LD_{50}$ was 495 mg/kg for ibuprofen, 187 mg/kg for Ibu-M.P., and over 1250 mg/kg for Ibu-P.A.. 6) The absorption rate constants(k) and half-life($t_{1/2}$) were 0.74($hr^{-1}$) and 0.94(hr) for ibuprofen, and 0.72 ($hr^{-1}$) and 0.96 (hr) respectively for Ibu-M.P..

• 대한한의학회지
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• 제32권1호
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• pp.67-83
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• 2011

Objectives: The purpose of this study was to examine the single dose toxicity with oral administration and genotoxicities of Ssanghwa-tang fermented with Lactobacillus acidophyllus. Materials and Methods: Clinical signs, weight changes, lethal doses$(LD_{50})$, and postmortem evaluation were determined by Globally Harmonized Classification System(GHCS) in a single-dose oral toxicity study. In vitro mammalian chromosomal aberration test was conducted with Ames test by cell proliferation suppression assessment using the cultivated CHO-K1(Chinese hamster ovary fibroblast) origins. Bacterial reversion assay was performed using Salmonella typhimurium (TA98, TA100, TA1535, and TA1537) and Escherichia coli (WP2uvrA). In vivo micronucleus test was performed using ICR mouse bone marrow. Results: No clinical sign was observed and none of the groups with doses up to 2000 mg/kg showed significant acute oral toxicity in the single dose oral administration. None of the sample doses taken during the 6 to 18 hour groups showed significant aberrant metaphases comparing to the negative control group in the in vitro mammalian chromosomal aberration test. No evidence of mutagenicity was seen for Escherichia coli (WP2uvrA) or Salmonella typhimurium (TA98, TA100, TA1535, and TA1537). No significant increase in the frequency of micronuclei was seen in the micronucleus test. Conclusion: These results indicate that the $LD_{50}$ value of Ssanghwa-Tang fermented with Lactobacillus acidophyllus may be over 2000 mg/kg and it have no acute oral toxicity and genotoxicity.

• 대한한의학방제학회지
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• 제17권2호
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• pp.65-72
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• 2009

Objectives : Yukmijihwang-tang (YJT) is known as a tonifying formula for reinforcement of yin deficiency conditions. The present study was carried out to investigate the potential acute toxicity of YJT in ICR male and female mice. Methods : We investigated the acute toxicity about boiling water-extracted YJT. The test article was orally administered once by gavage to 20 male and 20 female mice at dose levels of 0 (control group), 1250, 2500 and 5000 mg/kg body weight. Mortalities, clinical findings, autopsy and body weight changes were monitored daily for the 14 days following the administration according to the Regulation of Korean Food and Drug Administration. Results : We observed survival rates, general toxicity, change of body weight, and autopsy. Single oral administration of YJT with different dosages, no animals died of the test drug. Autopsy of animal revealed no abnormal gross finding. Therefore, $LD_{50}$ value of YJT for ICR mice was more than 5000 mg/kg on oral route. Conclusions : These results suggest that no toxic dose level of YJT in mice is considered to be more than 5000 mg/kg. Consequently, it was concluded that YJT have no effect on acute toxicity and side effect in ICR mice.

• Toxicological Research
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• 제22권4호
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• pp.453-458
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• 2006

This study was carried out to investigate the acute toxicity of surfactin C in mice. Surfactin C was administered orally at does of 0, 381, 610, 977, 1562 and 2500 mg/kg. Number of deaths, clinical signs, body weights, feed and water consumptions, and biochemical examinations were investigated for 14 days after single oral administration of surfactin C. $LD_{50}$ value was over 2500mg/kg in mice. In addition, no differences were found between control and treated groups in clinical signs, body weight gains, hematology, serum chemistry, feed and water consumptions. The results indicate that surfactin C did not show any toxic effects at 2500 mg/kg in mice.

• 동의생리병리학회지
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• 제20권3호
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• pp.572-574
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• 2006

The Dangguibohyel-tang (DBT) was used to treat anemia in traditional Korean medicine. Acute oral toxicity of DBT was studied in ICR mice. ICR mice were administered orally with dosages of 100 mg/kg (low dosage group), 200 mg/kg (middle dosage group), and 400 mg/kg (high dosage group) of DBT. We daily examined number of deaths, clinical signs, body weights and gross findings for 14 days. DBT did not show any toxic effect in ICR mice and oral LD50 value was over 400 mg/kg in ICR mice.