This study is a phase I, open-label study to determine recommended phase 2 dose (RP2D) for the BD03 vaccination in kidney transplant recipients. The recommended dose will be selected based on the safety and tolerability profiles observed.
It is reported that CMV and BKV infection and/or reactivations are associated with mortality and morbidity of kidney transplant recipient, and occurrence of PyVAN in kidney transplant recipients. BD03 is a DNA vaccine that consists of 3 plasmid DNAs encoding CMV antigens, BKV antigens and genetic adjuvant. It is expected to express antigen specific T-cell immune response, and ultimately prevent activation of both viruses. Plasmid DNA that encode CMV and BKV antigens are fused with tPA and Flt-3L to promote antigen specific immune response. Patient scheduled to receive kidney transplant from living donor are enrolled in this study. Eligible subjects will receive BD03 intramuscularly by electroporator three times on 6 weeks and 2 weeks prior to kidney transplant and 2\~4 weeks after the transplant. This study will be comprised of 3+3 dose escalation scheme and starting dose is 0.6mg and dose will be increased to 2mg and 6mg. Occurrence of dose limiting toxicities observed until 1 week after second injection (1week before kidney transplant) will guide whether to increase a dose. After third injection of BD03, follow up visits are done for 18 weeks.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
NONE
Enrollment
18
BD03 is to be administered intramuscularly 6 weeks and 2 weeks prior to kidney transplant and 2\~4 weeks after the transplant.
Samsung Medical center
Seoul, South Korea
RECRUITINGSeoul St.Mary's Hospital
Seoul, South Korea
RECRUITINGTolerability as measured by dose-limiting toxicities (DLTs)
An event will be considered a DLT if the event is reasonably related to study treatment during the 5weeks of treatment, and meets the following criteria: Any Grade 3 or greater toxicity per CTCAE 4.03 that would be considered dose-limiting except for those associated with kidney failure, Grade 3 or greater Creatine kinase increase that is not accompanied with Rhabdomyolysis, and any other Grade3 or greater toxicity that exists before participation of this study.
Time frame: 5 weeks
Proportion of subjects whose Spot Forming Units per unit PBMC are tripled compared to base line measurements and subjects whose Spot Forming Units of each antigen in 10^6 PBMC are greater than 50.
To evaluate the immunogenicity of BD03. ELISPOT assay of specific T cell responses to CMV and BKV antigens.
Time frame: Up to 30 weeks post-dose
Antibody response to CMV gB antigen
To investigate antibody level measured by Enzyme-Linked ImmunoSorbent Assay(ELISA)
Time frame: Up to 30 weeks post-dose
Antibody response to BKV VP1 antigen
To investigate antibody level measured by Enzyme-Linked ImmunoSorbent Assay(ELISA)
Time frame: Up to 30 weeks post-dose
Change of CMV and BKV plasma viral load over time
To investigate change of CMV and BKV plasma viral load over time
Time frame: Up to 30 weeks post-dose
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