Abstract: The invention features a method of treating a B-cell proliferative disorder by administering to a patient a BAR agonist, e.g., formulated for administration by a route other than inhalation (such as for oral or intravenous administration), in an amount effective to treat the B-cell proliferative disorder. The BAR agonist may be administered as a monotherapy or in combination with one or more other agents, e.g., a PDE inhibitor, an A2A receptor agonist, or an antiproliferative compound, in amounts that together are effective to treat the B-cell proliferative disorder. The invention further features pharmaceutical compositions and kits including a BAR agonist, alone or in combination with additional agents, for the treatment of a B-cell proliferative disorder.