Known as a female hormone, estrogen, has an effect on the male reproductive organs. The estrogen has to combine with the estrogen receptor to communicate a signal. Propyl pyrazole triol (PPT) is an estrogen receptor alpha selective agonist with a 410-, or 1,000-fold relative binding affinity for estrogen receptor alpha versus estrogen receptor beta. In this study, adult male mice were treated weekly with subcutaneously injections of PPT (0.01 mg, 0.1 mg, 1mg and 4 mg) suspended in castor oil (as control) for 8 weeks and observed histologically changes in testis, efferent ductule and epididymis. In the high concentrations of PPT 4 mg treatment group, a remarkable reduction was observed in the weight of the body, testis and epididymis. Microscopic examination revealed a reduction in seminiferous tubular diameter of the testis, and epithelial cell height of the epididymis in treated group during the experiment. In addition, as the diameter of the efferent ductule increased gradually, the height of epithelial cells was decreased. PPT 4 mg treatment group caused inhibition of spermatogenesis due to atrophied germinal epithelium in the testis, and decrease of adipocyte size attached to the epididymis. Sperm was not observed in the caudal epididymis of PPT 4 mg treated group. In conclusion, the injection of high concentrations of PPT into adult male mice induced physiological changes, such as an inhibition of spermatogenesis, and also histological changes within the reproductive organs.
This study was performed for searching for non-hepatectomy medium-term bioassay model by using newborn female rats. Newborn female Sprague-Dawley rats (1 day old) were given an intraperitoneal injection of 150 mg/kg of diethylnitrosamine (DENA). After three weeks, all rats were weaned and divided into three groups. Group 1 were fed on diets containing 0.01% 2-acetylaminofluorene (2-AAF) as a promoter for three weeks. Group 2 were given 0.05% phenobarbital (PB) in drinking water as a promoter for 8 weeks. Group 3 was control group. The autopsy was carried out at 4 weeks and 8 weeks after weaning. Preneoplastic lesions were indentified with immunohistochemical staining for glutathione S-transferase placental form (GST-P). In liver weight to body weight ratios, group 2 showed significant difference from group 1 (p<0.001) at 4 weeks after weaning. Group 1 and group 2 showed significant difference from group 3 at 8 weeks after weaning (p<0.0I, p<0.001), respectively. In quantitative analysis for GST-P positive lesion area by using Image Analyzer, group 1 and group 2 represented significant difference in comparison with group 3 at early 4 weeks after weaning (p
Ku, Ja-Seung;Lee, Joon-Suk;Shin, Jung-Won;Kim, Seong-Joon;Sohn, Nak-Won
The Journal of Korean Medicine
/
v.32
no.5
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pp.100-113
/
2011
Objectives: Brain edema is brain swelling that occurs due to the accumulation of excess water in the brain parenchyma. AQP4 and AQP9 are water-channel proteins expressed strongly in the brain and control water fluxes into and out of the brain parenchyma. This study was conducted to evaluate effect of Hwangnyeonhaedok-tang on brain edema and intracerebral hemorrhage. Methods: Intracerebral hemorrhage was induced by intrastriatal injection of type IV collagenase(0.23 U/${\mu}l$, 0.1 ${\mu}l$/min) into Sprague-Dawley rat brains. Hwangnyeonhaedok-tang water extract(1,000 mg/kg) was administered orally three times every 20 hours from 4 hours after ICH operation. Then hematoma volume, brain edema percentage, and water content of brain tissue were measured. Immuno-histochemistry was performed for AQP4 and AQP9 expressions in the brain sections and area % of immuno-labeling was analyzed with image analyzing system. Results: 1. Water extract of Hwangnyeonhaedok-tang reduced hematoma volume of ICH induced rat. 2. Water extract of Hwangnyeonhaedok-tang reduced MPO positive neutrophils in the perihematoma of the ICH induced rat. 3. Water extract of Hwangnyeonhaedok-tang reduced brain edema percentage and water content of brain tissue of ICH induced rat. 4. Water extract of Hwangnyeonhaedok-tang reduced AQP4 immuno-positive cells in the perihematoma of the ICH induced rat. 5. Water extract of Hwangnyeonhaedok-tang reduced AQP9 immuno-positive cells in the perihematoma of the ICH induced rat. Conclusions: These results suggest that Hwangnyeonhaedok-tang decreases intracerebral hemorrhage and brain edema by means of downregulating AQP4 and AQP9 expressions in the brain.
This research investigated whether exposure of diesel exhaust particulate (DEP) and particulate matter (PM) effects on airway remodeling in asthma induced Balb/c and IL-10 knock out (KO) mouse. Mice were sensitized with intraperitoneal injection with ovalbumin, followed by challenges with intranasal ovalbumin. After that mice placed in inhalation chamber and exposed to DEP and $PM(10\;mg/m^3)$. The evidence of airway remodeling was assessed by masson's trichrome staining and PAS staining. The stainability of masson's trichrome and PAS reaction were increased in asthma-induced Baltic mice groups compared with control mice groups. More intensive stainability for masson's trichrome and PAS were appeared in the asthma-induced DEP and PM-exposed groups than asthama-induced groups. But, not significantly increased subepithelial fibrosis and the nember of goblet cell hyperplasia in asthma-induced IL-10 KO mice groups and asthma-induced+DEP and PM-exposed IL-10 KO mice than IL-10 KO mice groups. These results indirectly suggesting that exposure to DEP and PM in asthmatic patients might be aggravate clinical symptoms and IL-10 which seems to play a central role in allergic asthma. In conclusion, DEP and PM exposure might have additive effects on the ovalbumin- induced asthma in a murine model.
Background: To minimize the use of antibiotics and to obtain a more sustainable fish culture and aquaculture industry, development of alternative natural source of immunostimulant to replace antibiotic in aquafeed is highly needed. Objective: Dietary inclusion effect of yacon (YC), ginger (GG), and blueberry (BB) on growth, body composition, and disease resistance of black rockfish against Vibrio anguillarum was compared to ethoxyquin (EQ). Methods: Four hundred eighty juvenile (an initial weight of 4.2 g) fish were randomly distributed into 12 of 50 L flowthrough tanks (forty fish per tank). Four experimental diets were prepared; the control (Con) diet with 0.01% EQ inclusion, and YC, GG, and BB diets at 1% each additive inclusion. Each additive was included into the experimental diets at the expense of wheat flour. Each diet was assigned to triplicate tanks of fish and hand-fed to satiation twice daily for 8 weeks. At the end of 8-week feeding trial, 20 fish from each tank fish were artificially infected by intraperitoneal injection with 0.1 mL of culture suspension of pathogenic V. anguillarum containing 3.3 × 106 cfu/mL respectively. Fish were monitored for the following 8 days after V. anguillarum infection and dead fish were removed every 6 h for the first 4 days and 12 h for the rest of the study. Results: Weight gain, specific growth rate (SGR), and feed efficiency ratio (FER) of fish fed the YC diet was higher than those of fish fed all other diets. However, feed consumption, protein efficiency ratio, and protein retention was not affected by dietary additive. Moisture, crude protein, and crude lipid content of the whole body of fish were affected by dietary additive. Analysis of the Kaplan-Meier survival curves showed that survival of fish fed the YC, BB, and GG diets was higher than the Con diet. Conclusion: Oral administration of YC can improve not only weight gain, SGR, and FER of black rockfish, but lower mortality of rockfish at occurrence of V. anguillarum.
Sao Hai Ying;Zhang Jing;Yeo Soo Jeong;Myung Chang Seon;Kim Hyang Mi;Kim Jong Moon;Park Jeong Hill;Cho Jung Sook;Kang Jong Seong
Archives of Pharmacal Research
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v.28
no.3
/
pp.335-342
/
2005
The effects of ginsenosides Rg$_3$(R) , Rg$_3$(S) and Rg$_5$/Rk$_1$ (a mixture of Rg$_5$ and Rk$_1$ 1:1, w/w), which are components isolated from processed Panax ginseng C.A. Meyer (Araliaceae), on memory dysfunction were examined in mice using a passive avoidance test. The ginsenosides Rg3(R), Rg3(S) or Rg$_5$/Rk$_1$, when orally administered for 4 days, significantly ameliorated the memory impairment induced by the single oral administration of ethanol. The memory impairment induced by the intraperitoneal injection of scopolamine was also significantly recovered by ginsenosides Rg3(S) and Rg$_5$/Rk$_1$. Among the three ginsenosides tested in this study, Rg$_5$/Rk$_1$ enhanced the memory function of mice most effectively in both the ethanoland scopolamine-induced amnesia models. Moreover, the latency period of the Rg$_5$/Rk$_1$treated mice was 1.2 times longer than that of the control (no amnesia) group in both models, implying that Rg$_5$/Rk$_1$ may also exert beneficial effects in the normal brain. We also evaluated the effects of these ginsenosides on the excitotoxic and oxidative stress-induced neuronal cell damage in primary cultured rat cortical cells. The excitotoxicity induced by glutamate or Nmethyl-D-aspartate (NMDA) was dramatically inhibited by the three ginsenosides. Rg$_3$(S) and Rg$_5$/Rk$_1$ exhibited a more potent inhibition of excitotoxicity than did Rg$_3$(R). In contrast, these ginsenosides were all ineffective against the H$_2$O$_2$- or xanthine/xanthine oxidase-induced oxidative neuronal damage. Taken together, these results indicate that ginsenosides Rg$_3$(S) and Rg$_5$/Rk$_1$ significantly reversed the memory dysfunction induced by ethanol or scopolamine, and their neuroprotective actions against excitotoxicity may be attributed to their memory enhancing effects.
BBiodegradable polymers have attracted great attention because of the increased environmental pollution by waste plastics. In this study, PLA (polylactic acid)/Clay-20 (Cloisite 20) and PLA (polylactic acid)/PBS (poly(butylene succinate)/Clay-20 (Cloisite 20) nanocomposites were manufactured in a twin-screw extruder. Specimens for mechanical properties of PLA/Clay-20 and PLA/PBS (90/10)/Clay-20 nanocomposites were prepared by injection molding. Thermal, mechanical, morphological and raman spectral properties of two nanocomposites were investigated by differential scanning calorimetry (DSC), tensile tester, scanning electron microscopy (SEM) and raman-microscope spectrophotometer, respectively. In addition, hydrolytic degradation properties of two nanocomposites were investigated by hydrolytic degradation test. It was confirmed that the crystallinity of PLA/Clay-20 and PLA/PBS/Clay-20 nanocomposite was increased with increasing Clay-20 content and the Clay-20 is miscible with PLA and PLA/PBS resin from DSC and SEM results. Tensile strength of two nanocomposites was decreased, but thier elongation, impact strength, tensile modulus and flexural modulus were increased with an increase of Clay-20 content. The impact strength of PLA/Clay-20 and PLA/PBS/Clay-20 nanocomposites with 5 wt% of Clay-20 content was increased above twice than that of pure PLA and PLA/PBS (90/10). The hydrolytic degradation rate of PLA/Clay-20 nanocomposite with 3 wt% of Clay-20 content was accelerated about twice than that of pure PLA. The reason is that degradation may occur in the PLA and Clay-20 interface easily because of hydrophilic property of organic Clay-20. It was confirmed that a proper amount of Clay-20 can improve the mechanical properties of PLA and can control biodegradable property of PLA.
Kim, Hyoung-Soon;Bae, Young-Chun;Lee, Sang-Min;Kim, Kyung-Yo;Won, Kyung-Sook;Lee, Kyung-Seong
Journal of Sasang Constitutional Medicine
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v.15
no.1
/
pp.90-108
/
2003
Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang(SGT) has been developed as prescriptions for the Soyeumin constitution. The hepatoprotective effect of the water extract of Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang(SGT) was investigated against carbon tetrachloride (CCl4)-induced hepatic damage. A single intra-peritoneal injection of CCl4 produced liver damage in rats as manifested by the significant rise of aspartate aminotransferase(AST), alanine aminotransferase(ALT), and alkaline phosphatase(ALP) in serum as compared to those of untreated normal group. Pretreatments of rats with Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang(SGT) 500 mg/kg for 7 days) were significantly reduced AST, ALT, and ALP levels compared with CCl4-treated control group. Treatment of rats with CCl4 led to significantly increase in lipid peroxidation and significantly decrease in cytochrome P450 and P450 reductase. The oral administration of Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang(SGT) water extract significantly inhibited the accumulation of microsomal thiobarbituric acid reactive substance (TBARS) and increased the cytochrome P450 and P450 reductase activity. All these biochemical alterations resulting from CCl4 administration were inhibited by the pretreatment with Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang(SG1) extract. These results suggest that Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang(SGT) water extract can be useful as a hepatoprotective agent. And the effect of NO modulation by NO synthesis or precursors, and Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang (SGT) water extract was researched on chronic liver damage induced by CCl4 administration. It was observed that endogenous NO protected the liver from lipid peroxidation, fibrosis, and damage. Osuyubujaijung-tang(OBT) and Sipyimiguanjung-tang(SGT) water extract showed the hepatoprotective effect on the chronic liver cirrhosis model and relationship with NO modulation.
Park, Shin-Ae;Jeong, Man-Bok;Kim, Won-Tae;Kim, Se-Eun;Park, Young-Woo;Jee, Hyang;Kim, Dae-Yong;Seo, Kang-Moon
Journal of Veterinary Clinics
/
v.25
no.5
/
pp.415-419
/
2008
The purpose of this study was to determine clinical features of canine episcleritis and outcomes of therapy in Korea. The medical records of dogs with episcleritis presented at the Veterinary Medical Teaching Hospital of Seoul National University from January 2006 to December 2007 were reviewed. Episcleritis was diagnosed in 17 eyes of 12 dogs. The most frequently affected breed was Shih Tzu (n = 6). The median affected age was 5 years with a range from 3 years to 12 years. Simple episcleritis was identified in 8 dogs, nodular granulomatous episcleritis (NGE) in 3 dogs, and secondary episcleritis caused by panophthalmitis in a dog. The combination immunosuppressive therapy of topical corticosteroids, topical cyclosporine A, and intralesional injection of triamcinolone (4 mg) and gentamicin (4 mg) was performed. Most of the patients with episcleritis were resolved within 30 days following the therapy. Surgical excision was performed in 1 NGE case which was not responded to the medical therapy. Recurrence was observed in 4 dogs between 5 and 8 months after the first visit. It is considered that strong immunosuppressive therapy and periodic ocular examination are needed to control episcleritis.
Kim, Se-Hun;Heo, Su-Young;Lee, Ki-Chang;Lee, Hae-Beom;Kim, Nam-Soo;Kim, Min-Su
Journal of Veterinary Clinics
/
v.28
no.3
/
pp.323-327
/
2011
A Jindo dog (8-month-old, intact male) was referred for hind limb lameness on the right side. The dog was diagnosed with a simple femoral fracture by radiological examination. After surgical fixation of the femoral fracture, tramadol: a narcotic-like synthetic analgesic was intravenously administrated for post-operative analgesia. After injection of the tramadol, generalized tonic clonic seizure was immediately occurred in the dog. Seventeen hours later, the dog died despite intensive care. We suspected that tramadol might induce the seizurogenic effect resulted in death. A necropsy was performed to examine the cause of the death. In consequence, the dog was diagnosed as necrotizing meningoencephalitis (NME) based on histopathological examination. We would be concerned that tramadol may be related to seizure activity in the NME patient. From this case, it is known that although tramadol has been proven to be a safe and effective agent for the control of pain in veterinary medicine, it would be carefully used to patient with history of neurological diseases including meningoencephalitis, hydrocephalus, and encephalopathy.
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