IFNG and breast cancer: In a group of breast cancer patients who had recently undergone surgery, stress levels significantly predicted i) lower NK cell lysis, ii) diminished response of NK cells to recombinant IFN-γ, and iii) decreased proliferative response of peripheral blood lymphocytes to plant lectins and to a monoclonal antibody directed against the T cell receptor.[119] Sudarshan Kriya (SK) and Pranayam (P) are known to reduce stress and improve immune functions.