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Characterization of 11 New Cases of Leukocyte Adhesion Deficiency Type 1 with Seven Novel Mutations in the ITGB2 Gene

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Abstract

Background

Leukocyte adhesion deficiency type 1 (LAD I) is an autosomal recessive disorder caused by mutations in the ITGB2 gene, encoding the β2 integrin family. Severe recurrent infections, impaired wound healing, and periodontal diseases are the main features of disease.

Methods

In order to investigate clinical and molecular manifestations of new LAD I cases, 11 patients diagnosed in one center during 7 years were studied. Patients were screened for the ITGB2 gene mutations, using polymerase chain reaction, followed by single-strand conformation polymorphism and sequencing.

Results

The most common first presenting feature of the patients was omphalitis. The mean age of cord separation was 19.9 ± 1 days. The most common clinical manifestations of the patients during the follow-up period included omphalitis, skin ulcers with poor healing, sepsis, and otitis media. During the follow-up, eight patients died. Eight homozygous changes, including seven novel mutations, were detected: two splicing (IVS4−6C>A, IVS7+1G>A), three missense (Asp128Tyr, Ala239Thr, and Gly716Ala), and three frameshift deletions (Asn282fsX41, Tyr382fsX9, and Lys636fsX22).

Conclusion

Our results indicate that different mutations underlie the development of LAD I. Definitive molecular diagnosis is valuable for genetic counseling and prenatal diagnosis. Regarding clinical presentations, it seems that omphalitis is the most consistent finding seen in LAD I infants.

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Acknowledgement

This study was supported by grants from the Iran National Science Foundation and Tehran University of Medical Sciences.

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Authors and Affiliations

  1. Infectious Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran

    Nima Parvaneh & Setareh Mamishi

  2. Department of Pediatrics, Pediatrics Center of Excellence, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran

    Nima Parvaneh, Setareh Mamishi, Amir Rezaei, Nima Rezaei, Anna Isaeian & Asghar Aghamohammadi

  3. Research Group for Immunodeficiencies, Pediatrics Center of Excellence, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, 14194, Iran

    Nima Parvaneh, Nima Rezaei & Asghar Aghamohammadi

  4. Department of Dermatology, Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran

    Banafshe Tamizifar

  5. Department of Biochemistry, Tarbiat Modares University, Tehran, Iran

    Leila Parvaneh

  6. Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran

    Roya Sherkat

  7. Department of Pediatrics, Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran

    Babak Ghalehbaghi

  8. Allergy Research Center, Department of Pediatrics, Namazi Hospital, Shiraz University of Medical Sciences, Shiraz, Iran

    Sara Kashef

  9. Department of Pediatrics, Mofid Children Hospital, Shaheed Beheshti University of Medical Sciences, Tehran, Iran

    Zahra Chavoshzadeh

  10. Department of Internal Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

    Farzaneh Ashrafi

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  1. Nima Parvaneh
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  2. Setareh Mamishi
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  3. Amir Rezaei
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  10. Zahra Chavoshzadeh
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  13. Asghar Aghamohammadi
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Correspondence to Nima Parvaneh.

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Parvaneh, N., Mamishi, S., Rezaei, A. et al. Characterization of 11 New Cases of Leukocyte Adhesion Deficiency Type 1 with Seven Novel Mutations in the ITGB2 Gene. J Clin Immunol 30, 756–760 (2010). https://doi.org/10.1007/s10875-010-9433-2

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  • DOI: https://doi.org/10.1007/s10875-010-9433-2

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