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Although the use of postmastectomy radiation therapy (PMRT) has been proven to bring survival benefit to breast cancer patients, the use of chest wall tissue equivalent filler (bolus) remains controversial. In recent years, a large number of studies have shown that the use of bolus in PMRT does not significantly improve the local control rate, while it can significantly increase the acute skin toxicity, and even leads to more frequent and longer treatment interruption. Existing retrospective studies have indicated that for breast cancer patients undergoing mastectomy and systemic therapy, if there is no skin invasion, it is recommended not to routinely use bolus during radiotherapy. However, higher-level clinical studies are needed for further confirmation.
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Aaptos sp. can be developed and utilized as a new antioxidant source. This study aims to investigate the antioxidantactivity and its acute toxicity of acetone ASE stands for Aaptos sp. Extract and its isolates. Aaptos sp. was extractedby acetone, followed by fractionating with vacuum liquid chromatography, liquid–liquid partition, and radialchromatography. Each step was intervened with thin-layer chromatography. Isolates identified by comparing theirphysical properties and 1H and 13C NMR stands for Nuclear Magnetic Resonance spectrum with literature data.Antioxidant activity assayed qualitatively and quantitatively, and the acute toxicity assayed with brine shrimp lethalitytest. Isolates of ASE (44 g) obtained were AS1 (50 mg), AS2 (23 mg), AS3 (8.3 mg), and AS4 (22 mg). AS1 isidentified as cholestanol. Antioxidant activity assayed qualitatively showed that ASE, AS1, AS2, and AS5 wereshowing as antioxidant activity, only ASE had IC50 values 16.10 µg/ml. LC50 of ASE, AS1, AS2, and AS5 were 1,041.5µg/ml; 1,488.33 µg/ml; 681,87 µg/ml; and 783,21 µg/ml, respectively. In conclusion, there are four isolates from theASE although only cholestanol (AS1) successfully identified. ASE, AS1, AS2, and AS5 have antioxidant activity butonly IC50 of ASEwas measured and they are regarded as safe with LC50 > 1,000 for ASE and LC50 > 200 for its isolates.
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Objective To evaluate the safety of Solanumprocumbens by studying its acute toxicity to mice. Methods The dosage of 100% death ( Dm) and 100% survive ( Dn) were determined. Five groups were set between the dosage of Dm and Dn in a 1:0.8 ratio, and then were intragastrically administrated once at the dosage of 250,200,160,128,102.4 g·kg-1 respectively.Toxicity and mortality of mice after intragastricly administration of Solanumprocumbens were observed for 14 days continuously. Results After four hours of administration, there were death in each group except the lowest dosage group (102.4 g·kg-1).Number of death of the groups 250,200,160 and 128 g·kg-1 were 10,8,6 and 3 respectively.LD50 of Solanumprocumbens was 153. 02 g · kg-1 , the 95% confidence interval was ( 136. 55, 171. 47 ) g · kg-1 . Conclusion Solanumprocumbens has a certain toxicity.More attention should be payed to its toxicity for clinical rational drug use.
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Objective To evaluate the safety of Solanumprocumbens by studying its acute toxicity to mice. Methods The dosage of 100% death ( Dm) and 100% survive ( Dn) were determined. Five groups were set between the dosage of Dm and Dn in a 1:0.8 ratio, and then were intragastrically administrated once at the dosage of 250,200,160,128,102.4 g·kg-1 respectively.Toxicity and mortality of mice after intragastricly administration of Solanumprocumbens were observed for 14 days continuously. Results After four hours of administration, there were death in each group except the lowest dosage group (102.4 g·kg-1).Number of death of the groups 250,200,160 and 128 g·kg-1 were 10,8,6 and 3 respectively.LD50 of Solanumprocumbens was 153. 02 g · kg-1 , the 95% confidence interval was ( 136. 55, 171. 47 ) g · kg-1 . Conclusion Solanumprocumbens has a certain toxicity.More attention should be payed to its toxicity for clinical rational drug use.
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Objective To study compatibility rule of herb-pair in rhubarb after compatibilities with fructus aurantii Immaturus,Chinese goldthread rhizome,moutan cortex,peach seed and kansui radix stir-baked with vinegar, and to observe its anti-inflammation and acute toxicity. Methods Mice were gavaged by 15,30 g?kg-1 rhubarb and rhubarb, rhubarb frutus aurantii immaturus rhizoma coptidis, radix et rhizoma rhei peony, rhubarb, semen persicae and rhubarb extracts from euphorbia kansui, respectively, in the morning and evening once, for 7 d.The effects of five different compatibility of Rhubarb on acute inflammation were observed in the mouse paw swelling induced by carrageenan. The classical method were used to determine acute toxicity of rhubarb and the contents of five different compatibility of rhubarb. Results Compared with the control group, the contents of five different compatibility of rhubarb with high and low dosage groups(30,15 g?kg-1 ) could inhibit the paw edema in mice,reduce NO and MDA production and enhanced activity of SOD in mice inflammatory tissue. The LD50 was not determined. Calculated by crude drug content, the MLD of rhubarb compatibilities with fructus aurantii immaturus, Chinese goldthread rhizome,moutan cortex,peach seed and kansui radix stir-baked with vinegar were 145.33,142.30,117.53,103.45, 113.09,182.36 g?kg-1 respectively, which were respectively equal to 581,569,470,418,452 ,729 times of people, s daily dried medicinal herb dosage. Conclusion The five different herb-pair have anti-inflammation effects after compatibility of Rhubarb, and it got best effects when rhubarb compatibility with kansui radix stir-baked, the next were rhubarb compatibility with Chinese goldthread rhizome and moutan cortex. It was basic security and low toxicity of herb-pair in rhubarb after compatibilities.
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Objective To evaluate the preclinical safety of 2-methoxyestradiol nanosuspension. Methods The safety of 2-methoxyestradiol nanosuspension for injection was observed through vascular stimulation test of the ear vein on rabbits, hemolytic test using rabbit erythrocytes, active systemic anaphylaxis (ASA) test on guinea pigs and acute toxicity test on mice. Results 2-Methoxyestradiol nanosuspension injection had no irritating effects on vessels, and no haemocytolysis, agglutination and ASA occurred.ASA test showed no allergy symptoms such as piloerection, nose rubbing and dyspnea in guinea pigs 30 min after sensitization.Acute toxicity test revealed that no pathological changes, including black spots and hyperaemia, were visually observed on the heart, liver and lungs after 14 days of intravenous administration. Conclusion 2-Methoxyestradiol nanosuspension injection is relatively safe, with low toxicity, and no hemolytic, anaphylactic and irritating effects. It may be clinically used for injection.
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Objective To study the relieving cough and reducing phlegm effects and acute toxicity of the Kujyukekuan mixtures. Methods The method used in our study is a cough model induced by the ammonia water , the phenol red test in mice, the mouse pinna swelling model induced by xylene and the maximum tolerant dose experiment. Results In antitussive experiments, R value of Kujyukekuan mixtures at low, medium and high dose of was 112. 26%, 143. 29%, 162. 07%, respectively regarding as ineffective, effective and marked effective;Kujyukekuan mixtures at medium and high doses increased the excretion of phenolsulfonphthalein in the trachea of mice (compared with the normal control group, P<0. 05 or P<0. 01),the results showed good concentration-response relationship;Kujyukekuan mixtures at low, medium and high dose significantly reduced mouse auricle swelling caused by xylene (compared with normal control group, P<0. 01), the results presented a good concentration-response relationship;the MTD of Kujyukekuan mixture was 326. 76 g·kg-1. Conclusion Kujyukekuan mixtures at medium and high doses exert significant eliminating cough and phlegm effects and strong anti-inflammatory property, and has a good security.
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Objective To understand the intensity and characteristics of acute toxicity of esculentoside A on mice and measure relevant parameters and observe its diuresis effect on rat. Methods After intraperitoneal injection of different concentrations of esculentoside A to mice, toxic reactions were observed. Rats with water load were intraperitoneally injected with different doses of esculentoside A. Total urine volume in six consecutive hours after the injection was determined. Results The LD50 of esculentoside A calculated by Bliss method was 26. 19 mg · kg-1 , and the 95% confidence interval was 23. 11-29. 85 mg·kg-1 . The mortality and acute toxicity of esculentoside A appeared to be dose-dependent while the blank control group had no abnormal reaction. The urine volume was significantly different between high dose group and the negative control group. No significant difference in urine volume was found between middle and the negative control group, and between low dose group and the negative control group. Conclusion Esculentoside A is poisonous to mice when single dose was intraperitoneally injected, and high dose of esculentoside A has diuresis effect on rat.