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Report of a Chinese Cohort with Leukocyte Adhesion Deficiency-I and Four Novel Mutations

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Abstract

Purpose

We aimed to report the characteristics of leukocyte adhesion deficiency-I (LAD-I) and four novel mutations in the ITGB2 gene in a Chinese cohort.

Methods

Seven patients with LAD-I were reported in our study. Clinical manifestations and immunological phenotypes were reviewed. The expression of CD18 was detected by flow cytometry. Next-generation sequencing (NGS) and Sanger sequencing were performed to identify gene mutations.

Results

The mean onset age of all the patients was 1.3 months. Recurrent bacterial infections of the skin and lungs were the most common symptoms. Most patients (6/7) had delayed cord separation. The number of white blood cells (WBC) was increased significantly, except that two patients had a mild increase in the number of WBC during infection-free periods. The expression of CD18 was very low in all patients. Homozygous or compound heterozygous mutations in the ITGB2 gene were identified in each patient. Four mutations were novel, including c.1794dupC (p.N599Qfs*93), c.1788C>A (p.C596X), c.841-849del9, and c.741+1delG. Two patients had large deletions of the ITGB2 gene. Five patients were cured by hematopoietic stem cell transplantation (HSCT).

Conclusions

This study reported the clinical and molecular characteristics of a Chinese patient cohort. It is helpful in understanding the current status of the disease in China.

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Acknowledgments

We thank the patients and their families for their cooperation.

Funding

This study was supported by the National Natural Science Foundation of China (81471482, 81373221) and the Children’s Hospital of Fudan University Funding (EK1125180110, EK112520180202).

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Author notes

  1. Bijun Sun and Qiuyu Chen contributed equally to this work.

Authors and Affiliations

  1. Department of Clinical Immunology, Children’s Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China

    Bijun Sun, Qiuyu Chen, Xiaolong Dong, Danru Liu, Jia Hou, Wenjie Wang, Wenjing Ying, Xiaoying Hui, Qinhua Zhou, Haili Yao, Jinqiao Sun & Xiaochuan Wang

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  1. Bijun Sun
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  2. Qiuyu Chen
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  11. Jinqiao Sun
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Correspondence to Jinqiao Sun or Xiaochuan Wang.

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Sun, B., Chen, Q., Dong, X. et al. Report of a Chinese Cohort with Leukocyte Adhesion Deficiency-I and Four Novel Mutations. J Clin Immunol 39, 309–315 (2019). https://doi.org/10.1007/s10875-019-00617-4

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  • DOI: https://doi.org/10.1007/s10875-019-00617-4

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