Effect of rapamycin on immunity induced by vector-mediated dystrophin expression in mdx skeletal muscle.

Effect of rapamycin on immunity induced by vector-mediated dystrophin expression in mdx skeletal muscle.
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DOI:
10.1038/srep00399
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Clemens, Paula R.
Clemens, Paula R.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Eghtesad, Saman;Jhunjhunwala, Siddharth;Little, Steven R.;Clemens, Paula R.

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杜氏肌营养不良症(DMD)是由肌营养不良蛋白基因突变引起的。将肌营养不良蛋白cDNA治疗性基因置换到营养不良肌肉中可以向组织提供功能性肌营养不良蛋白。然而,载体介导的基因转移受到抗载体和抗转基因宿主免疫力的限制,这会导致治疗性蛋白质的排斥。我们假设,雷帕霉素(RAPA)将减少免疫力,由于载体传递的重组肌营养不良蛋白在成年mdx小鼠模型的DMD。为了验证这一假设,我们在肌营养不良蛋白基因转移之前用含RAPA的聚乳酸-共-乙醇酸(PLGA)微粒注射mdx小鼠的肢体肌肉,并在6周后分析处理的组织。RAPA降低了宿主对载体介导的肌营养不良蛋白的免疫力,如细胞浸润减少和抗肌营养不良蛋白抗体产生减少所示。由于PLGA微粒的作用,RAPA对重组肌营养不良蛋白表达的作用的解释是复杂的。
Duchenne muscular dystrophy (DMD) is caused by mutations in the dystrophin gene. Therapeutic gene replacement of a dystrophin cDNA into dystrophic muscle can provide functional dystrophin protein to the tissue. However, vector-mediated gene transfer is limited by anti-vector and anti-transgene host immunity that causes rejection of the therapeutic protein. We hypothesized that rapamycin (RAPA) would diminish immunity due to vector-delivered recombinant dystrophin in the adult mdx mouse model for DMD. To test this hypothesis, we injected limb muscle of mdx mice with RAPA-containing, poly-lactic-co-glycolic acid (PLGA) microparticles prior to dystrophin gene transfer and analyzed treated tissue after 6 weeks. RAPA decreased host immunity against vector-mediated dystrophin protein, as demonstrated by decreased cellular infiltrates and decreased anti-dystrophin antibody production. The interpretation of the effect of RAPA on recombinant dystrophin expression was complex because of an effect of PLGA microparticles.
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