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Adenovirus-mediated antisense-ERK2 gene therapy attenuates chronic allograft nephropathy

N Gong1, C Dong, Z Chen

  • 1Institute of Organ Transplantation, Tongji Hospital, Wuhan, Hubei, China. nqgong@tjh.tjmu.edu.cn

Transplantation Proceedings
|December 19, 2006
PubMed
Abstract

Insights

Adenovirus-mediated antisense ERK2 gene therapy reduced chronic allograft nephropathy in rats. This treatment improved graft function and histology by blocking the ERK pathway and downregulating immune gene expression.

Area of Science:

  • Nephrology
  • Immunology
  • Gene Therapy

Background:

  • Chronic allograft nephropathy (CAN) is a major complication following kidney transplantation.
  • The precise mechanisms underlying CAN progression are complex and involve immune-mediated injury and inflammatory pathways.

Purpose of the Study:

  • To investigate the efficacy of adenovirus-mediated antisense ERK2 (Adanti-ERK2) gene therapy in attenuating CAN.
  • To evaluate the impact of Adanti-ERK2 gene therapy on graft histology, function, and immune gene expression.

Main Methods:

  • A rat kidney transplantation model (F344-->Lewis) was utilized, with four experimental groups: controls, vector controls, Adanti-ERK2 treated, and isograft.
  • Animals were monitored for proteinuria, graft histology, infiltrating immune cells, and expression of immune-related genes (interleukin-2 and intracellular adhesion molecule-1) over 20 weeks.

Main Results:

  • Adanti-ERK2 treatment significantly reduced proteinuria and improved graft histology and function compared to control groups.
  • ERK2 protein expression was significantly lower in the Adanti-ERK2 group.
  • Expression of immune-related genes (IL-2, ICAM-1) associated with chronic rejection was significantly downregulated by Adanti-ERK2 therapy.

Conclusions:

  • Adenovirus-mediated antisense ERK2 gene therapy effectively attenuated chronic allograft nephropathy in a rat model.
  • The protective effects are likely mediated by the blockade of the ERK signal transduction pathway, reducing both ERK expression and immune-related gene expression.

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