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Meta-analysis: the adjuvant role of thymopentin on immunological response to hepatitis B virus vaccine in end-stage renal disease Fabrizi F; Dixit V; Martin PAliment Pharmacol Ther 2006[Jun]; 23 (11): 1559-66BACKGROUND: It has been calculated that 30-40% of dialysis patients fail to produce antibodies to HBsAg antigen after vaccination towards hepatitis B virus. Several authors have reported on the benefit of thymopentin (TP5) as adjuvant to vaccine against hepatitis B virus in patients receiving regular dialysis. However, consistent information on this issue is still lacking. AIMS: To evaluate efficacy and safety of thymopentin as adjuvant to hepatitis B vaccine in dialysis patients by performing a systematic review with a meta-analysis of clinical trials. METHODS: We used the random effects model of DerSimonian and Laird, with heterogeneity and sensitivity analyses. RESULTS: We identified 11 studies involving 272 unique patients with end-stage renal disease. Only prospective, controlled trials were included. Pooling of study results did not show a significant increase in seroresponse rate among study (thymopentin plus hepatitis B virus vaccine) vs. control (hepatitis B virus vaccine alone) patients; the pooled odds ratio of failure to respond to hepatitis B virus vaccine was 0.677 (95% confidence intervals: 0.285-1.605); no heterogeneity was found (P = 0.0001). Thymopentin significantly improved the seroresponse rate in the subgroup of trials based on greater thymopentin doses (OR: 0.184; 95% CI: 0.085-0.398). CONCLUSIONS: Our meta-analysis showed that thymopentin significantly improved the seroresponse rate towards hepatitis B vaccine only in dialysis patients treated with higher thymopentin doses. The limited number of patients precluded definitive conclusions.|*Renal Dialysis[MESH]|Adjuvants, Immunologic[MESH]|Aged[MESH]|Female[MESH]|Hepatitis B Vaccines/immunology/*therapeutic use[MESH]|Hepatitis B/immunology/*prevention & control[MESH]|Humans[MESH]|Kidney Failure, Chronic/*immunology[MESH]|Male[MESH]|Middle Aged[MESH]|Prospective Studies[MESH]|Randomized Controlled Trials as Topic[MESH]|Thymopentin/*administration & dosage[MESH] |
