Analysis of possible factors relating to prognosis in autologous peripheral blood mononuclear cell transplantation for critical limb ischemia

Background aims. Autologous transplantation of granulocyte colony-stimulating factor mobilized peripheral blood mononuclear cells (M-PBMNCs) has been shown to be effective in treating critical limb ischemia (CLI); however, the studies of the possible prognosis predictors after autologous M-PBMNC transplantation are inadequate. The objective of the study was to assess the possible factors affecting the results of M-PBMNC transplantation for CLI. Methods. We reviewed the clinical profiles of 87 patients with CLI who were treated with M-PBMNC implantation in the Blood Diseases Hospital, Chinese Academy of Medical Sciences, between December 2002 and December 2011, and we followed these patients. The patients were divided into a good prognosis group and a poor prognosis group on the basis of whether amputation was performed. The significant differences of clinical variables between two groups were analyzed by means of the Mann-Whitney test and chi(2) test, and logistic regression analysis was used to study the variables representing the possible prognostic factors for amputation. Results. Of the 87 patients, three patients died and one patient was lost during the follow-up period. We analyzed 83 patients. The diseases included CLI complicated by diabetes mellitus gangrene (35 cases, 42.2%), arteriosclerosis obliterans (31 cases, 37.3%) and thromboangiitis (17 cases, 20.5%). The mean age was 62 years (range, 30-87). The median follow-up time for the surviving patients was 5 years. The 5-year amputation-free rate was 72.2%, and no adverse effects related to M-PBMNC transplantation were observed. Conclusions. The significant prognostic factors associated with poor angiogenesis were fibrinogen >4 g/L and fasting blood glucose >6 mmol/L.