instruction:
In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
question:
In this study , we examined whether PPARgamma ligand regulates osteopontin gene expression in THP - 1 cells , a cell line derived from human monocytic leukemia cells which can differentiate to macrophage upon stimulation with phorbol ester PMA .
answer:
PPARgamma ligand

question:
It appears that pseudohypoaldosteron is caused by a Type I receptor defect , that the defect may be complete or partial , that transmission may be autosomal recessive , and that the study of patients with pseudohypoaldosteron may indicate physiologic roles for Type I receptors in nonepithelial tissues .
answer:
Type I receptors

question:
Stem cell factor ( SCF ) and erythropoietin ( EPO ) work synergistically to support erythropoiesis , but the mechanism for this synergism is unknown .
answer:
Stem cell factor