• 대한수의학회지
• /
• 제15권1호
• /
• pp.47-50
• /
• 1975

Experimental studies were performed to observe the effect of exposure to 100% oxygen in 2 atmospheres on the lung tissue of rats, and to examine the resistant effect of DL-${\alpha}$-tocopherol. The following results were made through this experiment: 1. Half-lethal time by oxygen poisoning was longer in tocopherol treated group than not treated group. 2. Ratio of lung weight to body weight was significantly higher in fatal group within half-lethal time than survival group (p<0.01). 3. Histopathological changes of the lung by oxygen toxicity were vascular congestion, pulmonary edema, hemorrhage and emphysematous change. The degree of changes were rather marked in experimental group than tocopherol untreated group. Those were regard as the changes being occurred during tolerance process by prolonging half-lethal time.

• 대한약침학회지
• /
• 제16권2호
• /
• pp.41-45
• /
• 2013

Objective: The root bark of Ulmus davidiana var. Japonica (Ulmi Radicis cortex, URC) is a medicinal herb used for promoting diuresis and treating dampness. In Korea, URC has long been used as an efficacious therapy for inflammation, burns, frostbite and skin diseases such as eczema and psoriasis. Methods: In the present study, we used 1-fluoro-2,4-dinitrofluorobenzene (DNFB)-induced contact dermatitis (CD) mouse model to investigate the anti-allergic and the anti-inflammatory effects of URC on skin lesion, histopathological changes and specific antibody production. Results: URC treatment, 10 mg/mL, effectively inhibited skin lesions induced by repeated paintings with DNFB. In the histopathological observation, topical application of URC inhibited spongiosis. In addition, URC lowered the production levels of total immunoglobulin and IgG2a in serum. Conclusion: These data indicate that URC has an anti-inflammatory effect that produces an improvement of skin lesions in CD mice.

• 대한수의사회지
• /
• 제7권6호
• /
• pp.3-13
• /
• 1963

A large Proportion of an apparently healthy flock showed symptomes characterized by depression, loss of appetite, and watery diarrhea, and distention of the croup with sour-smelling contents, presenting severe cyanosis of comb. Laying flock revealed sever

• 한국수의병리학회지
• /
• 제1권2호
• /
• pp.135-138
• /
• 1997

A pulmonary keratinizing cyst was found incidentally in a 30-week-old female Sprague-Dawley rat. The cyst was lobe of the lung, lined by stratified squamous epithelium and filled with concentric layers of desquamated keratin. The wall consisted of 2-4 layers of well differenciated squamous cells. The adjacent lung tissues were slightly compressed but not otherwise damaged by the cyst. There was no inflammatory reaction or mitotic figures observed in the cyst.

• 동국한의학연구소논문집
• /
• 제11권
• /
• pp.66-73
• /
• 2008

Objectives: The study was designed to evaluate the single dose toxicity of modified Bo-yang-Hwan-o-Tang (mBHT) in Sprague-Dawley (SD) rats. Methods: The mBHT was once administrated orally to both sexes of rats at dose 2,000 mg/kg body weight which are the recommended maximum limit dose for acute toxicity. We recorded clinical signs of toxicity, body weight, gross and histological changes in target organs for all rats. Results: Neither significant changes of body weight not death was observed during the observation period in mBHT-administrated rats. Neither significant toxic signs not histopathological changes were shown during the observation period. There were not observed significant gross abnormality between the control and mBHT-administrated rats. Conclusions: These results indicated that the toxicity of mBHT is greater than 2,000 mg/kg body weight in SD rats.

• 한방안이비인후피부과학회지
• /
• 제21권1호
• /
• pp.38-54
• /
• 2008

Objective : This study was designed to investigated effects of Pinelliae Rizoma (PR) on asthma Methods : Detecting antigen specific antibody isotypes, cytokines in serum and bronchoalveolar lavage fluid (BALF). In addition, the present author also investigated changes in weight of spleen and proliferation rates of splenocytes. Finally, histopathological observation of the lung tissue was also investigated. Results : Oral administration of PR lowered OVA specific IgE levels in serum, IgG1 levels in serum and BALF. PR also decreased production levels of IL-4 in BALF. In addition, total cells in BALF were decreased by oral administration of PR effectively. In histapathological observation, PR group showed downward tendency of inflammatory cell infiltration around small vessels. Conclusion : PR is useful to treat patients with asthma and the mechanisms are related in suppression of Th2 skewing reactions.

• 대한약침학회지
• /
• 제18권3호
• /
• pp.57-62
• /
• 2015

Objectives: The purpose of this study was to examine the single-dose intravenous toxicity of Guseonwangdo-go glucose 5% pharmacopuncture (GWG5). Methods: Forty Sprague-Dawley rats were divided into four groups of five males and five females per group: an intravenous (IV) injection of 1.0 mL of normal saline solution per animal was administered to the control group; IV injections of 0.1, 0.5, and 1.0 mL of GWG5 per animal were administered to the experimental groups (G: 0.1, G: 0.5, and G: 1.0). Observation of clinical signs and body weight measurements were carried out for 14 days following the injections. At the end of the observation period, hematological, biochemical, and histopathological tests, as well as necropsy examinations, were performed on the injected parts. Results: No mortalities or adverse clinical signs were observed in any of the groups. The body weights of all groups continuously increased. In the hematological and the biochemical tests, females in G-0.1 had minimal changes, but those changes were not dose dependent. On necropsy examination, no abnormalities were observed. In the histopathological test, focal inflammatory cell infiltrations were observed in two female rats, one in the control group and one in G-1.0. Also, one female rat in the control group had an epidermis crust. These changes were concluded to have been caused by the insertion of the needle into a vein. Conclusion: The above findings suggest that the lethal dose of GWG5 administered via IV injection is more than 1.0 mL per animal in both male and female rats. Further studies are needed to establish more detailed evidence of its toxicity.

• 한방안이비인후피부과학회지
• /
• 제14권2호
• /
• pp.118-124
• /
• 2001

The single dose toxicity of Injinhotang, a herbal drug for treatment of hepatic injuries. was evaluated in Sprague-Dawley rats. Injinhotang was once administered to both sexes of rats at the dose levels of 2000, 1000, 500, 250 and 125 mg/kg for oral route. After single administration, clinical signs were observed every day for 14 days and body weights were measured 5 times including initial measurement on day 0 (the days of administration). When observation period was over, the animals were sacrificed and macroscopic examination of major organs was conducted. In addition, the histopathological profiles of these major organs were also conducted. Neither significant clinical signs nor death after administration was observed during the observation periods except for soft feces or diarrhea. In addition, no abnormal necropsy findings, changes of body weight and histopathological profiles were observed at terminal necropsy in both sexes. From these results, it is considered that $LD_{50}$ of Injinhotang is over 2000 mg/kg in oral administration in both sexes of rats.

• 한국산업보건학회지
• /
• 제31권4호
• /
• pp.473-483
• /
• 2021

Objectives: The present study aimed to evaluate the potential toxicity of 2-butoxyethanol after intratracheal instillation in male rats. Methods: In order to calculate median lethal dose (LD₅₀) of 2-butoxyethanol using Probit analysis with SAS program, the 2-butoxyethanol was administered with dose levels of 0, 101.64, 203.28 and 406.56 mg/kg by once intratracheal instillation to male rats. During the test period, clinical signs, mortality, body weights, organ weights, hematology, and serum biochemistry were examined. At the end of 14 days observation period, all animals were sacrificed and gross finding and histopathological examination were performed. Results: All animals of 406.56 mg/kg group died within 2 weeks after the administration of 2-butoxyethanol. Treatment-related clinical signs, gross observation and histopathological changes (mucous cell hyperplasia, alveolar macrophage aggregation, and hemorrhage) of lung exhibited an increased in 2-butoxyethanol treated groups in a dose dependent manner. However, there were no changes in the organ weights, hematology and serum biochemistry, and histopathology of any other organ except lung. Conclusions: On the basis of the results, it was concluded that a single intratracheal instillation of 2-butoxyethanol in male Sprague-Dawley rats resulted in some adverse effects on mortality, clinical sign, and histopathology in the lung. In the experimental conditions, the LD₅₀ of 2-butoxyethanol was considered to be 287.2 mg/kg and lung was founded to be the target organ of 2-butoxyethanol.

• 대한한방내과학회지
• /
• 제29권2호
• /
• pp.375-384
• /
• 2008

Objective : This study was carried out to investigate the effects of oral administration of Hyeungbangjihwang-tang (HBJHT) on the liver cirrhosis of rats induced by Carbon tetrachloride for 10 weeks. Method : The histopathological changes were observed. The HBJHT extracts were daily dosed at 50, 100 and 200mg/kg for 12 weeks. Results : Severe hepatocellular necrosis and ballooning, hyperplasia of connective tissue, subdued reduction of hepatic lobule, and hyperplasia of bile duct in portal triad were dramatically decreased in the HBJHT-treated group compared to that of the Carbon tetrachloride-treated control group in histopathological observation. The diameter of hepatic lobules was significantly enlarged in the HBJHT-treated group compared to that of the Carbon tetrachloride-treated control group, and the amounts of connective tissue, degenerative cells and bile ducts were significantly and dose-dependently decreased. Conclusion : It is concluded that HBJHT has a significant recovering effect on the liver of rats induced by carbon tetrachloride.