Mice were treated with PTH for 4 weeks before and after inoculation with BN stroma-dependent myeloma cells [38] (engineered to express luciferase; six mice/group) or with primary myeloma cells from three patients (for each patient's cells, a total of six hosts were used: three pretreated with saline, three pretreated with PTH). The gene discussed is PTH; the disease is plasma cell myeloma.