Study of Mast Cell Precursors

This study is currently recruiting participants. (see Contacts and Locations)
Verified December 2013 by National Institutes of Health Clinical Center (CC)
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00001756
First received: November 3, 1999
Last updated: August 1, 2014
Last verified: December 2013
  Purpose

This study will investigate mast cell precursors that circulate in the blood. In a group of diseases collectively known as mastocytosis, mast cells accumulate in abnormal amounts in the skin, lymphoid tissues, bone marrow, liver and spleen. Some forms of mastocytosis have a generally good prognosis; for others, the prognosis is poorer. There is no known cure for any form of the disease. A better understanding of mast cells and how they respond to certain substances may provide insights that will lead to effective treatments for mastocytosis.

Patients with systemic mastocytosis and normal healthy volunteers between the ages of 20 and 60 may be eligible for this 8-day study. Participants will undergo the following procedures:

  • Day 1 Medical history, physical examination, and blood tests to assess general health status
  • Days 2 through 6 Daily injections under the skin of G-CSF a hormone that stimulates white blood cell production
  • Day 7 Leukapheresis a procedure for collecting large numbers of white blood cells. In leukapheresis, blood is drawn through a needle placed in an arm and channeled into a cell separator machine. The white cells are collected and the rest of the blood is returned to the body through a needle in the other arm. The procedure takes up to 3 hours.
  • Days 7 and 8 Blood draw (about 1 teaspoon) to monitor white blood cell counts.

Condition
Mastocytosis

Study Type: Observational
Official Title: The Characterization of CD34+ Derived Mast Cell Precursors Mobilized by Administration of Granulocyte Colony Stimulating Factor and Plerixafor

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 300
Study Start Date: November 1997
Detailed Description:

The purpose of this protocol is to obtain large numbers of CD34+ cells from the peripheral blood of healthy volunteers and patients with systemic mastocytosis or other related allergic, hematological, and immunological conditions by leukapheresis for culture and characterization of mast cell progenitor cells and their response to various cytokines and anti-mitotic agents. Healthy volunteers and patients will be adults of both sexes from 18 to 70 years of age. Granulocyte colony stimulating factor (G-CSF) will be administered to healthy volunteers at dose of 10 mcg/kg/day as a subcutaneous dose daily for 5 days not to exceed 960mcg. Patients will receive Plerixafor at a dose of 0.24 mg/kg as a single subcutaneous dose not to exceed 24mg the night before leukapheresis as a mobilizing agent for CD34+ cells. Healthy volunteers will undergo a single leukapheresis at day 7, and patients will undergo a single leukapheresis at day 3 or 4. This is not a therapeutic protocol and does not involve reinfusion of any manipulated cells, viruses or DNA constructs back into human subjects.

  Eligibility

Ages Eligible for Study:   18 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria
  • SUBJECT INCLUSION CRITERIA:

Healthy Volunteers must:

  1. Be 18-70 years of age
  2. Be healthy
  3. Have adequate peripheral venous access
  4. Have normal renal function (creatinine less than or equal to 1.5mg/dL; less than or equal to 1 plus proteinuria)
  5. Have normal hepatic function (bilirubin less than or equal to 1.5 mg/dL)
  6. Have normal hematologic function (WBC greater than or equal to 3000/mm(3); granulocytes greater than or equal to 1500/mm(3) ; platelets greater than or equal to 175,000; hemoglobin greater than or equal to 12.5 g/dL)

Patients must:

  1. Be 18-70 years of age
  2. Have mast cell hyperplasia compatible with a diagnosis of systemic mastocytosis (applicable to systemic mastocytosis patients only) or other allergic, hematologic, or immunologic condition
  3. Have adequate peripheral venous access or be willing to have a central line placed.
  4. First be admitted as inpatients under an existing NIH protocol
  5. Have preserved renal function (creatinine less than or equal to 2 mg/dL; less than or equal to 2 plus proteinuria)
  6. Have preserved hepatic function (bilirubin less than or equal to 1.5 mg/dL)
  7. Have preserved hematologic function (WBC greater than or equal to 3000/mm(3); granulocytes greater than or equal to 1500/mm(3) ; platelets greater than or equal to 175,000; hemoglobin greater than or equal to 12.5 g/dL)

All female subjects of childbearing potential:

  1. May be enrolled if using effective contraception
  2. Have a negative serum or urine pregnancy test determined before beginning Plerixafor or G-CSF administration

SUBJECT EXCLUSION CRITERIA:

All subjects must not meet any of the following criteria:

Healthy volunteers and patients must not:

  1. Have active bacterial, fungal or viral infections
  2. Have viral screens positive for HIV or hepatitis B or C
  3. Be pregnant or lactating
  4. Have a history of autoimmune disease such as rheumatoid arthritis, vasculitis, pyoderma gangrenosum or similar disorder
  5. Have any condition, which in the judgment of the investigator, might place the subject at undue risk

Healthy Volunteers with any of the following will be excluded:

  1. Splenomegaly, pulmonary fibrosis and other related conditions
  2. Use of any investigative drugs within the past 12 months
  3. Have a significant coagulation disorder

Systemic Mastocytosis and Mast Cell Related Condition Patients with any of the following will be excluded:

  1. Patients taking any other growth factors, cytokines or investigative drugs
  2. Patients who are hemodynamically unstable (blood pressure systolic of lower than 105 or diastolic lower than 65)
  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 ClinicalTrials.gov identifier: NCT00001756

Contacts
Contact: Michelle O'Brien, R.N. (301) 496-2237 obrienm@mail.nih.gov
Contact: Hirsh D Komarow, M.D. (301) 594-2197 komarowh@mail.nih.gov

Locations
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    prpl@mail.cc.nih.gov   
Sponsors and Collaborators
Investigators
Principal Investigator: Hirsh D Komarow, M.D. National Institute of Allergy and Infectious Diseases (NIAID)
  More Information

Additional Information:
Publications:
Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
ClinicalTrials.gov Identifier: NCT00001756     History of Changes
Other Study ID Numbers: 980027, 98-I-0027
Study First Received: November 3, 1999
Last Updated: August 1, 2014
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Leukapheresis
Mastocytosis
G-CSF
Mast Cells
Progenitors
Normal Volunteer
Systemic Mastocytosis

Additional relevant MeSH terms:
Mastocytosis
Urticaria Pigmentosa
Neoplasms, Connective Tissue
Neoplasms, Connective and Soft Tissue
Neoplasms by Histologic Type
Neoplasms
Skin Diseases
Mastocytosis, Cutaneous
Pigmentation Disorders
Lenograstim
Adjuvants, Immunologic
Immunologic Factors
Physiological Effects of Drugs
Pharmacologic Actions

ClinicalTrials.gov processed this record on September 16, 2014