# Advances in complement inhibition therapy for paroxysmal nocturnal hemoglobinuria

**Authors:** 忆萌 史, 凤奎 张

PMC · DOI: 10.3760/cma.j.cn121090-20240903-00332 · Chinese Journal of Hematology · 2025-01-01

## TL;DR

Complement inhibition therapy has improved outcomes for PNH patients, but challenges remain with infection risks and breakthrough hemolysis.

## Contribution

The paper highlights the role of upstream complement inhibition in addressing extravascular hemolysis in PNH.

## Key findings

- C5 inhibitors reduce intravascular hemolysis and improve survival in PNH patients.
- Upstream complement inhibitors may reduce C3-mediated extravascular hemolysis and transfusion needs.
- Complement inhibition may increase infection risks and breakthrough hemolysis risks.

## Abstract

阵发性睡眠性血红蛋白尿症（PNH）为一获得性克隆性造血异常，以往大部分PNH患者主要接受支持性治疗，生活质量差，死亡率高。下游补体C5抑制剂的出现则极大地改变了PNH的自然病程，在改善临床症状的同时，明显降低严重并发症的发生，提高了患者的生存率。尽管C5抑制剂在控制血管内溶血（IVH）和提高血红蛋白（HGB）水平方面效果显著，但是上游补体成分C3介导的血管外溶血（EVH）使得近半数治疗患者仍需要输血。上游补体抑制剂在控制IVH的同时，减少了C3片段的沉积，从而解决EVH的问题，进一步改善了PNH患者的临床结局。但是，由于补体激活的级联反应以及上游补体抑制剂治疗后PNH红细胞的比例累积增加，可能会增加发生更为严重的突破性溶血事件的风险。此外，补体抑制剂可能会增加感染风险，这也是当前需要关注的问题。

## Linked entities

- **Proteins:** C5 (complement C5), C3 (complement C3)
- **Diseases:** paroxysmal nocturnal hemoglobinuria (MONDO:0100244), PNH (MONDO:0100244)

## Full-text entities

- **Genes:** C5 (complement C5) [NCBI Gene 727] {aka C5D, C5a, C5b, CPAMD4, ECLZB}
- **Diseases:** EVH (MESH:D006461), PNH (MESH:D006457), clonal hematologic disorder (MESH:D006402), infections (MESH:D007239)
- **Species:** Homo sapiens (human, species) [taxon 9606]

## Full text

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## References

64 references — full list in the complete paper: https://tomesphere.com/paper/PMC11886435/full.md

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Source: https://tomesphere.com/paper/PMC11886435