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The approach and novelty of this scientific work was to formulate the appropriate Streptozotocin (STZ) and Alloxan dosage in different routes of administration to imply minimum mortality rate and high incidence of diabetes mellitus (DM) in the rat experiment model. Rats were randomly divided into STZ, Alloxan and control groups. 1-Alloxan group was divided into two subgroups: intraperitoneal (ip) subgroups which received a single dose of, 140, 120, 100 and 80 mg/kg; and the subcutaneous (sc) subgroups which received a single dose of, 120, 110, 100, 90, and 80 mg/kg. 2-STZ group was divided into four subgroups of ip route. The ip subgroup which received intraperitoneally a single dose of, 30, 35, 40 and 50 mg/kg. 3-The control group: This group received solo distilled water. The injection day was considered as the day zero. Blood glucose levels and mortality rate were recorded. Subsequently, 30 days after, the logistic regression modeling was used to evaluate the effect of the explanatory variables, the dose levels, and route approaches, on the probability of DM incidence, and mortality. According to the statistical logistic analysis for Alloxan, it is concluded that the minimum dosage needed to induce DM was 120 mg/kg by sc method (probability 0.712). In addition, the logistic analysis for STZ showed that the optimal dose-level for STZ was 40 mg/kg with ip with approximate induction of DM probability 0.764. Based on the data, male Wistar rats in which received a single dosage of Alloxan by sc injection at dose of 120 mg/kg showed the most desirable result of induction of type I DM; furthermore, those in which received STZ by ip injection at the dose of 40 mg/kg developed a persistent and optimal DM state characterized by high rate of DM induction and low- level of mortality.

laboratory animal research

The effects of dosage and the routes of administrations of streptozotocin and alloxan on induction rate of type1 diabetes mellitus and mortality rate in rats