Volume 187, Issue 4 pp. 502-508
Research Paper

FAS-mediated apoptosis impairment in patients with ALPS/ALPS-like phenotype carrying variants on CASP10 gene

Maurizio Miano

Corresponding Author

Maurizio Miano

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

Correspondence: Dr. Maurizio Miano, Haematology Unit, IRCCS Istituto Giannina Gaslini, Largo G. Gaslini, 5 – 16148 Genoa, Italy.

E-mail: [email protected]

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Enrico Cappelli

Enrico Cappelli

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Agnese Pezzulla

Agnese Pezzulla

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

Pediatric Hematology/Oncology Unit, University of Catania, Catania, Italy

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Roberta Venè

Roberta Venè

Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy

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Alice Grossi

Alice Grossi

Genetic Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Paola Terranova

Paola Terranova

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Elena Palmisani

Elena Palmisani

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Rosario Maggiore

Rosario Maggiore

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Daniela Guardo

Daniela Guardo

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

Haematology Clinic, Department of Internal Medicine (DiMI), University of Genoa, IRCCS AOU S. Martino-IST, Genoa, Italy

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Tiziana Lanza

Tiziana Lanza

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Michaela Calvillo

Michaela Calvillo

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Concetta Micalizzi

Concetta Micalizzi

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Filomena Pierri

Filomena Pierri

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Chiara Vernarecci

Chiara Vernarecci

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Andrea Beccaria

Andrea Beccaria

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Fabio Corsolini

Fabio Corsolini

Laboratory of Molecular Genetics and Biobanks, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Marina Lanciotti

Marina Lanciotti

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Giovanna Russo

Giovanna Russo

Pediatric Hematology/Oncology Unit, University of Catania, Catania, Italy

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Isabella Ceccherini

Isabella Ceccherini

Genetic Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Carlo Dufour

Carlo Dufour

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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Francesca Fioredda

Francesca Fioredda

Haematology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy

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First published: 15 July 2019
Citations: 29

Summary

Autoimmune lymphoproliferative syndrome (ALPS) is a congenital disorder that results in an apoptosis impairment of lymphocytes, leading to chronic lymphoproliferation and autoimmunity, mainly autoimmune cytopenias. FAS gene defects are often responsible for the disease, the phenotype of which can vary from asymptomatic/mild forms to severe disease. More rarely, defects are associated to  other genes involved in apoptosis pathway, such as CASP10. Few data are available on CASP10-mutated patients. To date, two CASP10 mutations have been recognized as pathogenic (I406L and L258F) and others have been reported with controversial result on their pathogenicity (V410l, Y446C) or are known to be polymorphic variants (L522l). In this study, we evaluated apoptosis function in patients with an ALPS/ALPS-like phenotype carrying CASP10 variants. Molecular findings were obtained by next generation sequencing analysis of genes involved in immune dysregulation syndromes. Functional studies were performed after inducing apoptosis by FAS-ligand/TRIAL stimulation and analysing cell death and the function of CASP10, CASP8 and PARP proteins. We identified 6 patients with an ALPS (n = 2) or ALPS-like (n = 4) phenotype, carrying I406L (n = 1),V410l (n = 2),Y446C (n = 1) heterozygous CASP10 variants or the L522l polymorphisms (n = 2) associated with another polymorphic homozygote variant on CASP8 or a compound heterozygous mutation on TNFRSF13C. Apoptosis was impaired in all patients showing that such variants may play a role in the development of clinical phenotype.

Conflict of interest

The authors declare no financial disclosures.

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