NBI 35965 mesylate is primarily utilized in research settings to study its effects on specific biological pathways, particularly those involving the immune system. It has been investigated for its potential to modulate immune responses, making it a candidate for exploring treatments for autoimmune diseases and inflammatory conditions. Researchers are also examining its role in inhibiting certain enzymes or receptors that play a part in disease progression, which could lead to the development of novel therapeutic agents. Additionally, its application in preclinical studies helps in understanding the mechanisms of action and evaluating its efficacy and safety profile for future clinical use.