Effect of endoxan (cyclophosphamide) on the post-natal growth of long bones in the white mouse.
12 new-born mice were used in this work (6 controls). One group of mice was injected with endoxan (cyclophosphamide) diluted in saline at a daily dose of 0.003 microgram/g body weight for 30 days; control animals were injected with saline. After a survival period of 45 days, the animals were sacrificed and the thigh was dissected to extract the femur. It was found that the epiphyseal cartilage was greatly thinned after post-natal administration of endoxan. The cartilage cells became smaller, irregular and lost their regular palisade arrangement. The matrix was increased and stained deeply with HE. A dense layer of bone was deposited under the epiphyseal cartilage, a condition known as epiphyseodesis. This means that endoxan not only caused retardation of growth of long bones, but is also caused premature closure of the epiphysis.
D000818:Animals; D000831:Animals, Newborn / Q000254:growth & development; D001846:Bone Development; D001842:Bone and Bones / Q000187:drug effects; D002356:Cartilage / Q000033:anatomy & histology / Q000187:drug effects; D003520:Cyclophosphamide / Q000494:pharmacology*; D004838:Epiphyses / Q000187:drug effects / Q000254:growth & development; D051379:Mice
D003520:Cyclophosphamide