The Phenotype of Human Stk4 Deficiency Publisher Pubmed



Abdollahpour H¹ ; Appaswamy G¹ ; Kotlarz D^{1, 2} ; Diestelhorst J^{1, 2} ; Beier R¹ ; Schaffer AA³ ; Gertz EM³ ; Schambach A⁴ ; Kreipe HH⁵ ; Pfeifer D⁶ ; Engelhardt KR⁷ ; Rezaei N⁸ ; Grimbacher B⁷ ; Lohrmann S⁹ Show All Authors
Source: Blood Published:2012

Abstract

We describe a novel clinical phenotype associating T- and B-cell lymphopenia, intermittent neutropenia, and atrial septal defects in 3 members of a consanguineous kindred. Their clinical histories included recurrent bacterial infections, viral infections, mucocutaneous candidiasis, cutaneous warts, and skin abscesses. Homozygosity mapping and candidate gene sequencing revealed a homozygous premature termination mutation in the gene STK4 (serine threonine kinase 4, formerly having the symbol MST1). STK4 is the human ortholog of Drosophila Hippo, the central constituent of a highly conserved pathway controlling cell growth and apoptosis. STK4-deficient lymphocytes and neutrophils exhibit enhanced loss of mitochondrial membrane potential and increased susceptibility to apoptosis. STK4 deficiency is a novel human primary immunodeficiency syndrome.