The present invention primarily relates to a method for analyzing the amount of immunoregulatory integrin binding factors and/or patient endogenous antibodies which are directed against such factors, the factors having the capacity to modulate the immune functions in a subject suffering from cancer or inflammatory or autoimmune diseases, by utilizing binding reagents to determine these factors and/or the patient endogenous antibodies which are directed against such factors, whereby the prognosis and/or the therapeutic efficacy of any treatment of a subject suffering from cancer or inflammatory or autoimmune diseases can be determined and/or monitored. The invention further relates to the use of therapeutically active compounds for eliminating, inhibiting or enhancing such binding factors for the manufacture of pharmaceuticals to be used in the treatment of cancer, inflammatory conditions or autoimmune diseases.