# The efficacy and safety of protein A immunoadsorption combined with rituximab treatment for highly sensitized patients undergoing haplo-hematopoietic stem cell transplantation

**Authors:** 玲 李, 文娟 朱, 倩 朱, 士源 周, 超 马, 俊 王, 晓慧 胡, 悦 韩, 荧 王, 晓文 唐, 骁 马, 苏宁 陈, 惠英 仇, 璐瑶 陈, 军 何, 德沛 吴, 小津 吴

PMC · DOI: 10.3760/cma.j.cn121090-20231125-00277 · 2024-05-01

## TL;DR

This study shows that combining protein A immunoadsorption with rituximab safely reduces harmful antibodies in highly sensitized patients before a stem cell transplant.

## Contribution

The study introduces a safe and effective desensitization protocol for highly sensitized patients undergoing haplo-HSCT.

## Key findings

- Protein A immunoadsorption significantly reduced HLA antibody levels in patients with HLA I and II class antibodies.
- The treatment led to a notable decrease in IgG and complement C3 levels, indicating reduced immune activity.
- Post-transplant survival rates were high, with 83.8% overall survival and 80.2% disease-free survival within 100 days.

## Abstract

探究高致敏单倍体造血干细胞移植（haplo-HSCT）患者移植前行蛋白A免疫吸附（PAIA）联合利妥昔单抗（RTX）脱敏治疗的疗效及安全性。

回顾性分析2021年3月至2023年6月苏州大学附属第一医院和苏州弘慈血液病医院收治的高致敏haplo-HSCT患者56例，移植前行PAIA联合RTX脱敏治疗，吸附前后监测HLA抗体种类数量和平均荧光强度（MFI）、体液免疫和吸附过程的不良反应及100 d内的生存情况。

仅含HLA Ⅰ类抗体的患者接受PAIA治疗后中位MFI由7 859（3 209～12 444）降至3 719（0～8 275）（P<0.001），HLA Ⅰ+Ⅱ类抗体的中位MFI由5 476（1 977～12 382）降至3 714（0～11 074）（P＝0.035），其中抗供者特异性抗体阳性患者的中位MFI由8 779（2 697～18 659）降至4 524（0～15 989）（P<0.001）。所有患者HLA-A、B、C、DR、DQ抗体种类数量在PAIA治疗后均下降，差异均有统计学意义（A、B、C、DR：P<0.001，DQ：P<0.01）。PAIA治疗前后体液免疫监测显示IgG和补体C3数量显著下降（P值分别为<0.001和0.002）。44例患者接受了移植后HLA抗体监测，总体MFI和抗体种类数量均下降，但有5例患者出现低MFI的新生抗体，有9例持续高MFI，移植后100 d总生存率是83.8％，100 d内无病生存率为80.2％，100 d内非复发死亡率为16.1％，移植后100 d复发的累积发生率为4.5％。

PAIA联合RTX对haplo-HSCT前高敏患者的脱敏治疗有一定的疗效，安全性良好。

## Linked entities

- **Proteins:** HLA-A (major histocompatibility complex, class I, A), HLA-B (major histocompatibility complex, class I, B), HLA-C (major histocompatibility complex, class I, C), IGG (Immunoglobulin G level), C3 (complement C3)

## Full-text entities

- **Genes:** HLA-A (major histocompatibility complex, class I, A) [NCBI Gene 3105] {aka HLAA}, C3 (complement C3) [NCBI Gene 718] {aka AHUS5, ARMD9, ASP, C3a, C3b, CPAMD1}
- **Species:** Homo sapiens (human, species) [taxon 9606]

## Figures

4 figures with captions in the complete paper: https://tomesphere.com/paper/PMC11270498/full.md

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Source: https://tomesphere.com/paper/PMC11270498