Induction of Cytokines in Human Monocytes by SARS-CoV in Adults and Children

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00173563
Recruitment Status : Unknown
Verified August 2005 by National Taiwan University Hospital.
Recruitment status was:  Recruiting
First Posted : September 15, 2005
Last Update Posted : December 3, 2007
National Science Council, Taiwan
Information provided by:
National Taiwan University Hospital

Brief Summary:

Severe acute respiratory syndrome (SARS) is a new emerging infectious disease. Its pathogen is a newly discovered coronavirus (SARS-CoV). The clinical course can be classified to 3 stages: viral replication phase, hyperimmune reactive phase, and pulmonary destruction phase. Human monocyte plays a critical role in the initiation of immune response in defending the intracellular pathogens (eg viruses). Monocytes can engulf viruses and present the viral antigens in the major histocompatibility (MHC) molecule to the cell surface to initiate T lymphocyte response. Monocytes also secrete various cytokines to modulate immune response. SARS-CoV is a mutant of animal virus to cause human disease and is able to cause unusual severe respiratory illness. It is suggested the unusual severe disease is due to the intense immune reaction.

The investigators will harvest human monocytes from healthy adult and children blood donors. Monocytes would be cultured and infected by SARS-CoV. The change of viral load is monitored after infection. Cytokines secreted by monocytes after infection are also measured. The difference of monocyte cytokine secretion is compared between adults and children. The study is to verify the SARS-CoV infectivity of human monocytes and prove the unusual severity caused by SARS-CoV is related to viral-induced dysregulation of cytokine responses. The results may also clarify why adults tend to have a more severe illness compared with children.

Condition or disease

Study Type : Observational
Estimated Enrollment : 10 participants
Time Perspective: Prospective
Official Title: Induction of Cytokines in Human Monocytes by SARS-CoV in Adults and Children
Study Start Date : January 2005
Estimated Study Completion Date : September 2005

Information from the National Library of Medicine

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, Learn About Clinical Studies.

Ages Eligible for Study:   2 Years to 50 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy adults aged 20 to 50 years old
  • Healthy children aged 2 to 5 years old

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00173563

National Taiwan University Hospital Recruiting
Taipei, Taiwan, 100
Contact: Luan-Yin Chang, MD, PhD    886-2-23123456 ext 3245   
Contact: Pei-Lan Shao, MD    886-2-23123456 ext 2394   
Sponsors and Collaborators
National Taiwan University Hospital
National Science Council, Taiwan
Principal Investigator: Luan-Yin Chang, MD, PhD Department of pediatrics, National Taiwan University Hospital Identifier: NCT00173563     History of Changes
Other Study ID Numbers: 9461700731
First Posted: September 15, 2005    Key Record Dates
Last Update Posted: December 3, 2007
Last Verified: August 2005

Keywords provided by National Taiwan University Hospital: