Molecular Mechanisms and Diagnosis of Mastocytosis

Completed

• Conditions: Mastocytosis
• Interventions: Other: Collection of blood and bone marrow

• Registration Number: NCT00336076
• Lead Sponsor: University of Michigan

Brief Summary

Mastocytosis is a disorder characterized by presence of excessive numbers of mast cells in skin, bone marrow and internal organs. It can affect both children and adults, males and females and individuals from all ethnic backgrounds, although precise demographic information about the affected populations is not available as it is a rare disorder. Mastocytosis in children is generally limited to the skin and follows a self limited course, while it is a disorder of the hematopoietic stem cell associated with somatic mutations of the c-kit gene in most patients with adult-onset of disease. There is no known curative therapy for most patients with systemic mastocytosis. Recent research studies identified several subtypes of disease with distinct clinical and pathologic features, however, a precise understanding of the incidence as well as molecular pathology of different disease subtypes is lacking. This study aims to examine molecular and cellular pathological aspects of disease in patients with mastocytosis and correlate findings with clinical presentation and prognosis. Patients will undergo a routine history and physical examination, and diagnostic tests will be ordered as dictated by each patient's clinical presentation. Blood and bone marrow will be obtained for diagnostic and research purposes. Genetic analysis of the c-kit gene regulating mast cell growth and differentiation will be performed. It is hoped that findings obtained from this study will help to design novel therapies for mastocytosis and other disorders in which mast cells play a critical role.

Detailed Description

Not available

Study Timeline

• Study Start: 2004-07
• Study First Submitted: 2006-06-08
• Study First Submitted QC: 2006-06-09
• Study First Posted: 2006-06-12
• Primary Completion: 2008-12
• Study Completion: 2009-07
• Status Verified: 2016-11
• Last Update Submitted: 2016-11-03
• Last Update Posted: 2016-11-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 136

Inclusion Criteria

• Confirmed or suspected diagnosis of mastocytosis.
• Ability to give informed consent (by the patient or legal guardian if minor)

Exclusion Criteria

• Inability or not willing to provide informed consent.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Participants evaluated for mastocytosis	Collection of blood and bone marrow	Observational study of all patients referred for suspected mast cell disease. Collection of blood or bone marrow for analysis during diagnostic procedures.

Primary Outcome Measures

Name	Time	Method
Proportion of the patients with clonal and non-clonal mast cell disorders	1 week	Patients were categorized into one of the clonal and non-clonal mast cell disorder categories after availability of diagnostic data

Secondary Outcome Measures

Name	Time	Method
Proportion of KIT D816V mutation in blood, bone marrow and sorted mast cells	1 week	KIT D816V mutation was assessed in patient samples containing various proportions of neoplastic mast cells.

Trial Locations

Locations (1)

University of Michigan; 🇺🇸 Ann Arbor, Michigan, United States