Thrombopoietin Receptor Levels in Tumor Cell Lines and Primary Tumors

Table 2

Number (%) of Primary Tumor Samples With Detectable MPL mRNA Expression Determined by Microarray Analysis.

𝑛 (%)	RCC; 𝑛=151	Soft Tissue Sarcomas 𝑛=22	Bony/Cartilage Sarcomas 𝑛=12
MPL	0	7 (32)	4 (33)
EPOR	132 (87)	6 (27)	4 (33)
ERBB2	122 (81)	21 (95)	9 (75)
IGF1R	81 (54)	ND	ND

EPOR: erythropoietin receptor; ERBB2: human epidermal growth factor; IGF1R: insulin growth factor-1 receptor; MPL: thrombopoietin receptor; ND: not determined; RCC: renal cell carcinoma; RMA: robust microarray averages. Detectable expression is determined by a RMA≥50.