The Cardiovascular Effects of Ricin in Rabbits
| Autor: | Kenneth J. Dormer, Casey P. Robinson, Chia-Hsuh Hsu, Victoria J. Christiansen |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Male
medicine.medical_specialty Health Toxicology and Mutagenesis Microgram Diastole Blood Pressure Ricin Biology Pharmacology Toxicology Cardiovascular System Lethal Dose 50 Electrocardiography chemistry.chemical_compound Heart Rate Heart rate medicine Animals Lethal dose Lectin Surgery Blood pressure chemistry Injections Intravenous Toxicity biology.protein Rabbits |
| Zdroj: | Pharmacology & Toxicology. 74:148-152 |
| ISSN: | 1600-0773 0901-9928 |
| DOI: | 10.1111/j.1600-0773.1994.tb01090.x |
| Popis: | Ricin is a toxic lectin from the castor bean. The time course of its toxic effects on the cardiovascular system of rabbits was investigated after determining its LD50 and minimum lethal dose in rabbits by the Up and Down method, as a basis for dosing. Systolic and diastolic arterial pressures, electrocardiogram and heart rate were recorded for 48 hr following administration of either a toxic sublethal (0.22 microgram/kg) or minimum lethal dose (0.44 microgram/kg) of ricin. After a delayed onset of about 20 hr, the minimum lethal dose (0.44 microgram/kg) of ricin caused a significant decrease in both systolic and diastolic pressures (P < 0.05). The systolic and diastolic pressures decreased 0.47 and 0.39 mmHg/hr more so than control groups, respectively. A toxic sublethal dose (0.22 microgram/kg) of ricin did not significantly alter either systolic or diastolic pressure. Neither dose of ricin caused cardiac arrhythmias or significantly increased heart rate. We conclude that the lethal hypotensive sequelae of ricin toxicity in the rabbit were peripheral in origin and not cardiogenic at these two doses. |
| Databáze: | OpenAIRE |
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