No effect of anti–OB-R on leukemic cell growth or angiogenesis in bone marrow of rats with deficient leptin receptors.

Leukemic fa/fa rats were either not injected (control) or injected with anti–OB-R. Nucleated cells and histologic sections from bone marrows of these rats were then examined for the number of leukemic cells (A) and microvessel density (B). Values represent means + SEM; n = 8 rats.