Clinical and molecular study on Fechtner syndrome--case report and literature review / 中华血液学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To identify clinical and laboratory abnormalities and genetic defect of Fechtner syndrome in a Chinese family.</p><p><b>METHODS</b>The characteristic morphological features of platelets and leukocytes were examined on blood smears with Wright's-Giemsa staining and ultrastructure of platelet and leukocyte were investigated under electron microscope. Genomic DNA was isolated from peripheral blood of the proband and 9 members of his family. All the exons and exon-intron boundaries of the MYH9 gene were amplified by PCR followed by direct sequencing.</p><p><b>RESULTS</b>Patients presented the characteristic clinical features including macrothrombocytopenia, leukocyte inclusions and/or hereditary nephritis. A heterozygous C to T mutation was found in the proband and three members of his family at nucleotide 5981 in exon 40 of MYH9 gene, resulting in a nonsense mutation which encoded truncated protein due to premature termination at the Arg 1933 codon.</p><p><b>CONCLUSION</b>It is the first report of a Chinese family with Fechtner syndrome. The Arg (CGA) 1933--> stop (TGA) nonsense mutation in MYH9 gene is a causative genetic defect.</p>