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Study of Factors Regulating Mast Cell Proliferation

This study is currently recruiting participants. (see Contacts and Locations)
Verified March 17, 2017 by National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) )
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) ) Identifier:
First received: August 17, 2002
Last updated: April 20, 2017
Last verified: March 17, 2017

This study will examine growth factors that promote and inhibit mast cell proliferation resulting in mastocytosis, a disease of excessive mast cells in the body. These cells can release chemicals that cause itching, blisters, flushing, bone pain and abdominal pain.

Patients up to 80 years of age with mastocytosis may be eligible for this 1-day study. Participants will have one visit at NIH lasting up to 8 hours, during which they will undergo the following tests and procedures:

  • Medical history and physical examination.
  • Laboratory studies, if medically indicated.
  • Blood tests to identify genetic changes important in the growth, development, and functioning of mast cells.
  • Bone marrow aspiration and biopsy.

For the bone marrow procedure, the skin over the hipbone and the outer surface of the bone itself are numbed with local anesthesia. Then, a special needle is inserted into the hipbone and about 1 tablespoon of bone marrow is drawn into a syringe. Another needle is inserted into the same area to collect a small piece of the bone marrow. Additional procedures may include allergen testing, urinalysis, and 24-hour urine collection.

Participants will receive an evaluation of their mastocytosis.


Study Type: Observational
Official Title: Regulation of the Proliferation and Survival of Normal and Neoplastic Human Mast Cells

Resource links provided by NLM:

Further study details as provided by National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) ):

Primary Outcome Measures:
  • Date that the final subject will be examined or an intervention received for the purposes of final collection of data for the primary outcome [ Time Frame: 08/18/2027 ]

Estimated Enrollment: 500
Study Start Date: August 16, 2002
Detailed Description:
This protocol is designed to examine those growth potentiating and inhibiting factors which regulate mast cell number and survival in patients with mastocytosis, and to explore the molecular basis of the disease process in hopes of improving therapy. Patients will carry the diagnosis of mastocytosis based on abnormal bone marrow biopsy and aspirate, abnormal skin biopsy, presence of urticaria pigmentosa, and if available, elevated serum tryptase level > 20 ng/ml and the presence of aberrant mast cell morphology and surface markers of CD2 and CD25. Medical work-up is in accordance with standard medical practice. Mastocytosis patients will be children and adults from birth to 80 years of age. The protocol is designated for up to a 1-year enrollment period; with only a small number of enrolled patients that will stay on study for more than one visit, based on investigator assessment of contribution to study objectives. Patients may be asked to re-enter this protocol at a later time for further research or entry into protocol 98-I-0027. This is not a therapeutic protocol. Treatment using FDA licensed/approved drugs may be provided to patients on a case-by-case basis at the discretion of the principal investigator. and This protocol does not involve infusion of any manipulated cells, viruses or DNA constructs into human subjects.

Ages Eligible for Study:   1 Year to 65 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Birth to 80 years of age.

Histologic evidence of increased mast cell number by bone marrow and/or skin biopsy or documentation of mastocytosis in the skin

supported with a photograph of diagnostic skin lesion

Must be under the care of a primary care physician to be enrolled.

Patients must be able and willing to undergo a bone marrow biopsy. A bone marrow biopsy will be pre-empted if, during the procedure, the patient experiences significant flushing, pain, hypotension or tachycardia for any reason, which places the patient at risk. A patient may decline to have a bone marrow biopsy if the bone marrow sample is only for research purposes.

Bone marrow biopsy will be performed on children only if medically indicated. Research samples will be collected at that time only if the procedure does not increase the risks to the child.


No primary care physician.

Anemia with hemoglobin less than 8 g/dL, hematocrit less than 24.


A biological relative with or without the diagnosis of mastocytosis by skin examination or histologic evidence in a skin or bone marrow biopsy

Subject has a primary medical care provider outside the NIH


No primary care physician.

Anemia with hemoglobin < 8 g/dL, hematocrit < 24.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00044122

Contact: Robin R. Eisch, R.N. (301) 443-1720
Contact: Dean D Metcalfe, M.D. (301) 496-2165

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact Patient Recruitment and Public Liaison Office (PRPL)    800-411-1222 ext TTY8664111010   
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)
Principal Investigator: Dean D Metcalfe, M.D. National Institute of Allergy and Infectious Diseases (NIAID)
  More Information

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID) Identifier: NCT00044122     History of Changes
Other Study ID Numbers: 020277
Study First Received: August 17, 2002
Last Updated: April 20, 2017

Keywords provided by National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) ):
Urticaria Pigmentosa

Additional relevant MeSH terms:
Neoplasms, Connective Tissue
Neoplasms, Connective and Soft Tissue
Neoplasms by Histologic Type
Skin Diseases processed this record on May 25, 2017