This is a Phase I, investigator-initiated and open-label study. Patients will be evaluated and treated at University of Alabama Birmingham Hospital. Patients will receive both oral and IV arginine with the physician choice of paclitaxel, pembrolizumab, +/- bevacizumab or pembrolizumab, bevacizumab, and oral cyclophosphamide, where doses and schedule are consistent with standard of care. Patients who are excluded from the trial due to progression will be scheduled for three- and six-months follow-up evaluations after the last dose. The goal for enrollment will be 6-24 patients with a 3-patient safety dose escalation lead-in using a 3+3 enrollment model for each regimen.
