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A Suction Blister Protocol to Study Human T-cell Recall Responses In Vivo
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Published on: August 11, 2018

Eponym: Johanson-Blizzard syndrome.

Nima Rezaei1, Mozhgan Sabbaghian, Zhifeng Liu

  • 1Research Group for Immunodeficiencies, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran. nima_rezaei@farabi.tums.ac.ir

European Journal of Pediatrics
|June 18, 2010
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Summary

Johanson-Blizzard syndrome is a rare genetic disorder caused by UBR1 gene mutations. It leads to pancreatic insufficiency and distinct facial and developmental abnormalities, with only symptomatic treatment available.

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Area of Science:

  • Genetics
  • Pediatrics
  • Endocrinology

Background:

  • Johanson-Blizzard syndrome (JBS) is an extremely rare autosomal recessive disorder.
  • It is characterized by exocrine pancreatic insufficiency and multiple congenital anomalies.
  • Mutations in the Ubiquitin-Protein Ligase E3 Component N-Recognin 1 (UBR1) gene are the underlying cause.

Purpose of the Study:

  • To summarize the key features and genetic basis of Johanson-Blizzard syndrome.
  • To highlight the diagnostic criteria and current treatment limitations.

Main Methods:

  • Literature review of JBS cases.
  • Analysis of clinical and genetic data from reported patients.

Main Results:

  • JBS presents with exocrine pancreatic insufficiency, aplasia/hypoplasia of alae nasi, oligodontia, sensorineural hearing loss, hypothyroidism, scalp defects, intellectual disability, and developmental delay.
  • Anorectal, urogenital, and cardiac anomalies are also frequently observed.
  • UBR1 gene mutations are confirmed as the cause, and symptomatic treatment is the only option.

Conclusions:

  • Exocrine pancreatic insufficiency combined with abnormal alae nasi is pathognomonic for JBS.
  • Early diagnosis and genetic testing are crucial for management.
  • Further research into potential targeted therapies is warranted.