Recruiting

Observational Study

Sponsor:

National Institute of Allergy and Infectious Diseases (NIAID)

Code:

NCT00090662

Conditions

Healthy Volunteer

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Accepted

Study Details

Brief summary:

Increased numbers of white blood cells called eosinophils can cause disease. To investigate this disease, researchers need blood, urine, sputum, stool, cerebrospinal fluid, skin and/or bone marrow samples to compare to samples from patients with this problem. Some of the samples will be used for genetic testing or future research.

This study will last for about 10 years and will include a maximum of 50 paid volunteers ages 18 to 65.

...

Conditions

Healthy Volunteer

Study ID

NCT00090662

Start date

Dec 9, 2004

Status verified date

Apr 24, 2026

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Accepted

  • Eligibility criteria for volunteer whole blood donation are based on the Standards of the AABB(2) and the Code of Federal Regulation 21 CFR 640(3). Specific criteria follow:

INCLUSION CRITERIA (blood, urine, stool, infrared thermograpy, photography, gastrointestinal secretion, pulmonary function testing

and/or sputum donation)

  • ability to sign informed consent
  • healthy male or female
  • 18-85 years of age

EXCLUSION CRITERIA (blood, urine, stool, infrared thermograpy, photography, gastrointestinal secretion, pulmonary function testing

and/or sputum donation)

  • pregnancy
  • weight <110 pounds
  • history of heart, lung, kidney disease, chronic anemia or bleeding disorders

Eligibility for tissue biopsy donation (other than skin) will be determined by the protocol under which the procedure is performed and the physician performing the procedure.

Eligibility criteria for volunteer bone marrow, skin and cerebrospinal fluid donation are more stringent than those for other specimen donations to minimize risk of procedure complications and maximize utility of specimens for study:

INCLUSION CRITERIA (bone marrow, cerebrospinal fluid and/or skin donation)

  • ability to sign informed consent
  • healthy, male or female
  • 18-65 years of age
  • willingness to provide concurrent blood sample

EXCLUSION CRITERIA (bone marrow, cerebrospinal fluid and/or skin donation)

  • a known bleeding disorder, low platelets (<100k) or taking medications that interfere with blood clotting, such as aspirin, non-steroidal anti-inflammatory agents or warfarin
  • anemia (hemoglobin less than 12.3 mg/dL)
  • evidence of an immune deficiency, such as HIV infection or cancer
  • pregnancy
  • taking a medication that affects the immune response within the past month, including oral, intravenous, or injectable steroids
  • allergic to xylocaine
  • have taken an investigational drug in the last 6 months
  • any other medical condition that the investigator feels puts the participant at too high a risk for participation

  • warfarin and/or heparin treatment will not be stopped so that a subject can participate in this protocol. If warfarin or heparin was recently discontinued, a subject can be enrolled, but no bone marrow procedures will be performed until the PT is < 15.5 seconds and the PTT is within normal range. For other agents that interfere with blood clotting without prolonging the PT, a 7- day washout period will be required before bone marrow sampling, skin biopsy or lumbar puncture.

Additional exclusion criteria (cerebrospinal fluid)

-Previous diagnosis of central nervous system pathology (including tumors,

inflammatory conditions, infection, seizure disorder, spina bifida)

  • History of spinal surgery with hardware placement
  • History of any spinal surgery or injections of the lumbosacral spine
  • Headache on the day of donation

Additional exclusion criteria (skin biopsy)

-History of keloid or abnormal scar formation

Study Design

Enrollment

150 participants

Anticipated

Interventions and Outcome Measures

Arms

Healthy volunteer

Healthy volunteer

Primary outcome measure

  • - To provide an IRB-approved mechanism for the collection of peripheral blood, urine, sputum, stool, cerebrospinal fluid, skin biopsy and bone marrow samples from paid, volunteer donors for use in in vitro studies. [ Time Frame: 50 years ]

Central Contacts and Locations

Central contacts

Locations

National Institutes of Health Clinical Center

Recruiting

Bethesda, Maryland, United States, 20892

Contacts

For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR)

800-411-1222ccopr@nih.gov

More Information

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

Last update posted

Sep 1, 2026

Last verified

Apr 24, 2026

Keywords

  • Cerebrospinal Fluid
  • Stool
  • Urine
  • Natural History
  • Skin
  • Sputum
  • Healthy Volunteer
  • HV

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by National Institute of Allergy and Infectious Diseases (NIAID) on 2026-09-01.