The present invention provides methods for determining a putative agent that treats or prevent obesity and/or obesity related diseases comprising contacting cells with the putative agent and measuring the activity and/or level of Maf1 and/or the activity and/or level of KIAA1875. The present invention also provides the agent identified by the methods herein and methods of treating or preventing obesity and/or obesity related diseases in a subject comprising administering to the subject a therapeutically effective amount of an agent that inhibits or downregulates Maf1 and/or activates or upregulates KIAA1875.
