Apheresis to Obtain Plasma or White Blood Cells for Laboratory Studies

NCT00001349 | Terminated

• 2 other identifiers: 93005793-I-0057
• Study Type: observational
• Target: 205
• Locations: 1 country
• Sites: 1

Brief Summary

This study will collect blood plasma and white blood cells for laboratory research using a procedure called apheresis. Apheresis is a method of collecting larger quantities of certain blood components than can safely be collected through a simple blood draw. Patients 7 years of age and older with a parasitic infection or condition associated with a parasitic infection (i.e., elevated levels of IgE antibodies or of a type of white cell called eosinophils) who are currently enrolled in a NIH clinical research protocol may be eligible for this study. Relatives of patients and normal healthy volunteers will also be enrolled. Candidates will have a medical history, physical examination and blood tests. Individuals weighing less than 25 kilograms (55 pounds) may not participate. Participants will undergo one of the following two apheresis procedures:

• Automated pheresis Whole blood is drawn through a needle placed in an arm vein and circulated through a cell separator machine. The plasma (liquid part of the blood) and white cells are extracted, and the red cells are re-infused into the donor through a needle in the other arm. The procedure takes 1 to 2 hours.
• Manual pheresis Whole blood is drawn through a needle placed in an arm vein and circulated through the cell separator machine. The red blood cells are separated from the rest of the blood and returned to the donor through the same needle. Usually only one needle stick is required and the procedure takes from 30 to 45 minutes. This method is used only in individuals who weigh less than 35 kg (77 pounds).

Conditions

Leukopheresis; Plasmapheresis

Keywords

Plasmapheresis; Lymphocytes; Eosinophils; Neutrophils

Outcome Measures

Primary Outcomes (1)

• To obtain leukocytes,platelets, and plasma from subjects already enrolled on other NIAID/LPD protocols.

  Leukocytes, platelets, and plasma will be collected.

  Ongoing as this is a method to collect cells from subjects enrolled on other LPD protocols

Study Arms (1)

1

Donors first admitted to another approved clinical research protocol of the NIAID before having the apheresis procedures described in this protocol.

Eligibility Criteria

• Age: 8 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Any subject enrolled on an existing !RB-approved LPD protocol may be asked to participate and thereby undergo apheresis.

You may qualify if:

• Enrolled on another LPD protocol.
• Weight greater than or equal to 25 kg
• Willingness to participate

You may not qualify if:

• Age less than 7 years
• Weight less than 25 kg
• Cardiovascular instability
• Hct less than 30
• Inadequate venous access
• PTT or PT greater than 1.5 normal
• Pregnancy
• Women who are actively breastfeeding
• Other condition which the attending physician or Apheresis Unit staff considers a contraindication to the procedure
• For Hetastarch procedure
• Hypertension
• Evidence of fluid retention

Sponsors & Collaborators

• National Institute of Allergy and Infectious Diseases (NIAID): lead

Study Sites (1)

National Institutes of Health Clinical Center, 9000 Rockville Pike

Bethesda, Maryland, 20892, United States

Location

Related Publications (3)

• Boyd A, Ribeiro JM, Nutman TB. Human CD117 (cKit)+ innate lymphoid cells have a discrete transcriptional profile at homeostasis and are expanded during filarial infection. PLoS One. 2014 Sep 25;9(9):e108649. doi: 10.1371/journal.pone.0108649. eCollection 2014.

  PMID: 25255226 BACKGROUND

• Chatterjee S, Clark CE, Lugli E, Roederer M, Nutman TB. Filarial infection modulates the immune response to Mycobacterium tuberculosis through expansion of CD4+ IL-4 memory T cells. J Immunol. 2015 Mar 15;194(6):2706-14. doi: 10.4049/jimmunol.1402718. Epub 2015 Feb 9.

  PMID: 25667413 BACKGROUND

• Santiago Hda C, Ribeiro-Gomes FL, Bennuru S, Nutman TB. Helminth infection alters IgE responses to allergens structurally related to parasite proteins. J Immunol. 2015 Jan 1;194(1):93-100. doi: 10.4049/jimmunol.1401638. Epub 2014 Nov 17.

  PMID: 25404363 BACKGROUND

Related Links

• NIH Clinical Center Detailed Web Page

Biospecimen

Retention: SAMPLES WITH DNA

Leukocytes, platelets and plasma will be collected. Since this protocol only allows for apheresis to be performed on participants enrolled on another LPD protocol, any biological samples collected will be covered by the other, individual protocol on which the participant is enrolled.

Study Officials

• Thomas B Nutman, M.D.

  National Institute of Allergy and Infectious Diseases (NIAID)

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: OTHER
• Sponsor Type: NIH
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 3, 1999
• First Posted: November 4, 1999
• Study Start: March 23, 1993
• Primary Completion: November 9, 2021
• Study Completion: November 9, 2021
• Last Updated: November 10, 2021

Record last verified: 2021-11

Locations

US (1)