Effects of HIV on the Development and Function of Bone Marrow Cells

March 3, 2008 updated by: National Institute of Allergy and Infectious Diseases (NIAID)

Effects of Infection With the Human Immunodeficiency Virus on the Development and Function of Bone Marrow Cells

This study will examine the effects of HIV on bone marrow cells. Various types of cells from bone marrow will be studied to learn which cells become infected with HIV, what changes occur in the number of or growth patterns of the cells, what kinds of proteins the cells make in the presence or absence of HIV and whether the cells can function normally.

HIV-infected and non-infected individuals 18 years of age and older may participate in this study.

Participants will undergo the following procedures:

  • Blood draw: Blood will be drawn through a needle from a hand or arm vein. About 150 milliliters (10 tablespoons) will be collected each time. No more than 450 ml (30 tablespoons) will be taken over a 6-week period.
  • Bone marrow aspirate: Bone marrow will be drawn from the hipbone. For this procedure, a local anesthetic is injected in the skin over the hipbone. A small needle is put about 1/2-inch through the shell of the bone and about 3 to 4 teaspoons of marrow are drawn from the cavity into a syringe.

White cells from marrow of uninfected individuals may be infected with HIV in the laboratory and grown over time for study. Alternatively, uninfected cells may be used as controls to compare with cells from HIV-infected individuals.

White cells from marrow of HIV-infected individuals will be grown in the laboratory and studied in comparison with cells from uninfected individuals. Or, bone marrow cells may be injected into immune-deficient mice to try to develop an animal model for HIV infection. White blood cells will also be studied in the laboratory to learn how the immune system responds to HIV infection.

Study Overview

Status

Completed

Conditions

Detailed Description

Hematologic abnormalities occur with high frequency (up to 70% of patients) in human immunodeficiency virus (HIV) infected individuals. The pathogenesis of these abnormalities is not currently understood, although both an abnormal bone marrow environment (e.g., altered growth factor production) and direct infection and dysfunction of progenitor cells themselves have been postulated. Under the current protocol we have studied bone marrow precursor cells from both HIV infected and uninfected individuals and have shown not only that these cells are infectable in vitro with HIV but also infected in vivo in a subpopulation of seropositive individuals. While the effects of HIV infection of precursor cells on subsequent hematopoietic potential is not completely understood, we could not show a clear correlation between in vivo infection of these cells and suppressed hematopoiesis. It seems clear from this study and others that other alterations within the bone marrow environment must play a role in the clinically observed hematologic abnormalities. We therefore wish to continue our studies to elucidate the relative contributions of direct infection of myeloid progenitor cells and alterations in bone marrow environment in the pathology seen in HIV infected individuals. Understanding the pathogenesis of abnormal hematopoiesis in HIV infection will allow investigators to design appropriate therapeutic strategies. Using recently developed techniques we also wish to use bone marrow cells from HIV infected individuals to establish antibody libraries. This will allow the study of immunologically important epitopes on the HIV virion with potential impact on the subsequent design of HIV vaccines or introduction of passive immunotherapy. Thirdly, research in the field of HIV has been hampered by the lack of an appropriate animal model. One promising approach is the use of human bone marrow to reconstitute lethally irradiated Balb/c mice. Once the human hematopoietic system is established in the mouse, it may be possible to infect these animals with HIV and study in an in vivo model the effects of infection on hematopoiesis.

Study Type

Observational

Enrollment

300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Maryland
      • Bethesda, Maryland, United States, 20892
        • National Institute of Allergy and Infectious Diseases (NIAID)

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

INCLUSION CRITERIA:

Both HIV seropositive and seronegative individuals.

Have adequate blood counts (HIV positive volunteers: hemoglobin greater than or equal to 9.0 g/dL, HCT greater than or equal to 28%, platelets greater than or equal to 50,000; HIV negative healthy normal volunteers: hemoglobin greater than or equal to 12.5 g/dL, HCT greater than or equal to 38%, platelets greater than or equal to 150,000.

Aged 18 years or older, male or female.

Ability to give informed, written consent.

This protocol was amended in 1990 to allow inclusion of Zairian patients who were studied by the principal investigator on site in Zaire. These marrow aspirations were all performed in March-April 1990 before the current requirements for Multi-site Collaborations were instituted. At this time, no further off-site collaboration will be undertaken under this protocol.

EXCLUSION CRITERIA:

Women who are pregnant.

Patients/volunteers with blood clotting disorders as demonstrated by an elevated PT, PTT or low platelet count (Seropositive: platelets greater than or equal to 50,000; Seronegative: platelets greater than or equal to150,000.

Patients/Volunteers who are taking NSAIDS or other anti-coagulant medication.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

February 1, 1989

Study Completion

December 1, 2005

Study Registration Dates

First Submitted

November 3, 1999

First Submitted That Met QC Criteria

November 3, 1999

First Posted (Estimate)

November 4, 1999

Study Record Updates

Last Update Posted (Estimate)

March 4, 2008

Last Update Submitted That Met QC Criteria

March 3, 2008

Last Verified

December 1, 2005

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 890035
  • 89-I-0035

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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