animal experiment 8 endocrine system 8 isophane insulin 8 rat 8 streptozocin 8 Diabetes Mellitus, Experimental 6 Rats 6 nonhuman 6 radioisotope 6 Animalia 4 Animals 4 Female 4 Insulin 4 Luteinizing Hormone 4 animal model 4 article 4 diabetes mellitus 4 drug efficacy 4 female genital system 4 gonadorelin 4 intravenous drug administration 4 luteinizing hormone 4 streptozocin diabetes 4 unclassified drug 4 5alpha androstane 3alpha,17beta diol c 14 2 Animal 2 Binding Sites 2 Biological Assay 2 Blood Glucose 2 Castration 2