{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T12:34:25Z","timestamp":1753878865024,"version":"3.41.2"},"reference-count":35,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2023,3,21]],"date-time":"2023-03-21T00:00:00Z","timestamp":1679356800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Scand J Immunol"],"published-print":{"date-parts":[[2023,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Griscelli syndrome type 2 (GS2) is an autosomal recessive immunodeficiency characterized by hair hypopigmentation, recurrent fever, hepatosplenomegaly and pancytopenia. This study aims to find new genetic changes and clinical features in 18 children with GS2 caused by <jats:italic>the RAB27A<\/jats:italic> gene defect. In all, 18 Iranian children with GS2 who presented with silver grey hair and frequent pyogenic infection were included in this study. After recording demographic and clinical data, PCR sequencing of the <jats:italic>RAB27A<\/jats:italic> gene was performed for all exons and exon\u2013intron boundaries. Two patients in this study were subjected to whole\u2010exome sequencing followed by Sanger sequencing. Light microscopy study of hair showed large irregular clumps of pigment with the absence of giant granules on the blood smear. Mutation analysis of the <jats:italic>RAB27A<\/jats:italic> gene identified two novel missense mutations as homozygous in a patient, one in exon 2, c.140G&gt;C and another in exon 4, c.328G&gt;T. In addition, for 17 other patients, 6 reported mutations were obtained including c.514_518delCAAGC, c.150_151delAGinsC, c.400_401delAA, c.340delA, c.428T&gt;C and c.221A&gt;G. The mutation c.514_518delCAAGC was the most frequent and found in 10 patients; this mutation may be considered a hotspot in Iran. Early diagnosis and treatment of RAB27A deficiency can contribute to better disease outcomes. In affected families, genetic results could be urgently needed to make a timely decision about haematopoietic stem cell transplantation and prenatal diagnosis.<\/jats:p>","DOI":"10.1111\/sji.13264","type":"journal-article","created":{"date-parts":[[2023,3,15]],"date-time":"2023-03-15T14:59:50Z","timestamp":1678892390000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Molecular findings and clinical manifestations of 18 Iranian children with Griscelli syndrome type 2: Two novel homozygote mutations in <i>RAB27A<\/i> gene in a patient"],"prefix":"10.1111","volume":"97","author":[{"given":"Shaghayegh","family":"Tajik","sequence":"first","affiliation":[{"name":"Immunology, Asthma and Allergy Research Institute Tehran University of Medical Sciences  Tehran Iran"},{"name":"Children's Medical Center, Pediatrics Center of Excellence Tehran University of Medical Sciences  Tehran 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