But the graft rejection, both acute and chronic rejection, is still an obstacle for heart transplantation.

但心脏移植后的急性、慢性排斥反应一直是阻碍心脏移植广泛应用的最重要因素。

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Chronic rejection, which results in scarring of the lung's airways following inflammation, is irreversible.

而导致炎症期后的肺组织瘢痕化的慢性排斥是不可逆转的。

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Objective To investigated the relationship between the expression of PCNA and transplant arteriosclerosis of chronic rejection.

目的探讨慢性排斥反应移植动脉硬化与增殖细胞核抗原（PCNA）表达的关系。

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However, she said, it might have no bearing on longer-term chronic rejection, which reduces the life of the transplanted organ.

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But there is a chronic shortage of donor organs and a high risk of rejection after transplantation.

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