Title

Cyclic neutropenia and severe congenital neutropenia in patients with a shared ELANE mutation and paternal haplotype: evidence for phenotype determination by modifying genes

UMMS Affiliation

Department of Pediatrics; Senior Scholars Program

Date

8-2010

Document Type

Article

Medical Subject Headings

Base Sequence; Child; Child, Preschool; Fathers; Genetic Predisposition to Disease; *Haplotypes; Humans; Infant; Inheritance Patterns; Leukocyte Elastase; Male; *Mutation; Neutropenia; Pedigree; Phenotype; Spermatozoa

Disciplines

Hematology | Oncology | Pediatrics

Abstract

BACKGROUND: Cyclic neutropenia (CN) and severe congenital neutropenia (SCN) are disorders of neutrophil production that differ markedly in disease severity. Mutations of the ELANE gene (the symbol recently replacing ELA2) are considered largely responsible for most cases of CN and SCN, but specific mutations are typically associated with one or the other.

PROCEDURE: We performed ELANE genotyping on all individuals and paternal sperm in an SCN kindred with eight SCN progeny of a sperm donor and six different mothers. RESULTS: One patient with CN had the same S97L ELANE mutation as seven patients with the SCN phenotype. The mutant allele was detected in the donor's spermatozoa, representing 18% of the ELANE gene pool, but not in DNA from his lymphocytes, neutrophils, or buccal mucosa, indicating gonadal mosaicism.

CONCLUSIONS: The coexistence of CN and SCN phenotypes in this kindred with a shared paternal haplotype strongly suggests both a role for modifying genes in determination of congenital neutropenia disease phenotypes, and the classification of CN and SCN within a spectrum of phenotypes expressing varying degrees of the same disease process.

Rights and Permissions

Citation: Pediatr Blood Cancer. 2010 Aug;55(2):314-7. Link to article on publisher's website

Comments

Talia Pindyck participated in this study as a medical student as part of the Senior Scholars research program at the University of Massachusetts Medical School.

Related Resources

Link to article in PubMed

PubMed ID

20582973