Blood, 1959, Vol. 14, No. 11, pp. 1187-1193.
© 1959 American Society of Hematology, Inc.
Permanent Granulocytosis in Mice Due to Cortisone
DAVID R. WEIR 1 and
VIVIAN BRENNER 1
1 Highland View Hospital, University Hospitals, and the Department of Medicine,
Western Reserve University, Cleveland, Ohio.
1. Intermittent cortisone therapy given over a period of 59 weeks caused
permanent granulocytosis in mice from a nonleukemic Albino strain. The
granulocytosis persisted for the lifetime of the animals, the longest survival
being 97 weeks. Two of 40 animals developed histologic findings entirely
comparable to human myeloid leukemia.
2. It is assumed that such cortisone therapy produces a permanent change
in the basic mechanisms which control the production of granulocytes or
their release from the bone marrow. Possibly the metabolic change may be
related to inhibition of vitamin B6 activity.
Submitted on November 13, 1958
Accepted on January 26, 1959