Navigation Links
NIH study describes new method for tracking T cells in HIV patients
Date:2/3/2014

WHAT:

A team of researchers has reported a novel method for tracking CD4+ T cells in people infected with HIV. CD4+ T cells are critical for immune defense against an array of pathogens and are a primary target of HIV. In the study, researchers used a unique, replication-incompetent (defective) form of HIV identified in a patient in the early 1990s. The defective virus had integrated into the genome of a single CD4+ T cell. Like a barcode, this "provirus" marked the originally infected CD4+ T cell and its progeny, enabling researchers to track its lineage for 17 years. This new method allows scientists to distinguish dividing cells from dying ones, something that has not been possible with existing labeling techniques, but is essential for studying how immune cells survive HIV infection.

The study, published in the online issue of AIDS, was conducted by Hiromi Imamichi, Ph.D., H. Clifford Lane, M.D., and others in the Laboratory of Immunoregulation at the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health. The cell lineage is part of a subset of CD4+ T cells called "effector memory" (TEM) cells. This distinction is significant because it is currently believed that TEM cells last for only days or weeks. The NIAID investigators demonstrated that this subpopulation of T cells can persist for at least 17 years.

The researchers also observed in the blood cells of patients a higher frequency of defective HIV proviruses than what has been reported in previous work. Although these defective variants cannot produce an infectious virus, many retain the ability to generate small pieces of HIV, leading the researchers to speculate that these "foreign materials" within CD4+ T cells may play a key role in the ongoing immune activation that is characteristic of HIV infection, including in patients with "undetectable" virus in their blood.


'/>"/>

Contact: Linda Huynh
linda.huynh@nih.gov
301-402-1663
NIH/National Institute of Allergy and Infectious Diseases
Source:Eurekalert

Page: 1

Related medicine news :

1. NIH study offers insight into why cancer incidence increases with age
2. Tighter economic regulation needed to reverse obesity epidemic -- study
3. Kessler Foundation MS researchers study predictors of employment status
4. U of Maryland study: Partnership may help address cancer, health disparities
5. Study uncovers molecular keys to invasive bladder cancer
6. Study finds mammography beneficial for younger women
7. Infection control practices not adequately implemented at many hospital ICUs: study
8. Study: Oropharyngeal cancer on the rise in young adults
9. Autism Speaks study finds advances towards universal early screening
10. Future directions for landmark diabetes study in journal Diabetes Care
11. Study examines repeat colonoscopy in patients with polyps referred for surgery without biopsy-proven cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/10/2016)... ... February 09, 2016 , ... A new leadership team for Mid-South Youth ... Joe Wiley made the announcement Monday night, Feb. 8, prior to the evening session ... FHU and the creator of GO! Camp, has been named director. Gayle McDonald, currently ...
(Date:2/10/2016)... ... February 09, 2016 , ... Ross ... Specialists are delighted to welcome a new addition to their growing practice. Beginning ... Specialists as a nurse practitioner performing cosmetic procedures including injectables, fillers ...
(Date:2/10/2016)... , ... February 09, 2016 , ... ... concussion, yet the cause of injury may be one of many possible sources: ... PT Continuing Education Course , Mastering Rehab Solutions for the Complexities ...
(Date:2/9/2016)... , ... February 09, 2016 , ... Steven Douglas Associates ... of South Florida Event, an upscale fundraiser held in South Florida. The Inaugural What’s ... guests alike. This year the event will be held in a new, more causal ...
(Date:2/9/2016)... ... 09, 2016 , ... Interstate Restoration LLC, a full service ... the acquisition of Hawaii DKI. Hawaii DKI is one of the more recognized ... who excel at service and response helps support our goal of becoming the ...
Breaking Medicine News(10 mins):
(Date:2/9/2016)...  Bluestar Silicones will promote its Silbione® Biomedical ... implant applications and announce certification of its clean ... West Conference (Booth #1759), February 9-10, at the ... --> Available in 01 through 70 ... physical properties enabling our customers to optimize their ...
(Date:2/8/2016)... -- Alzheimer Diagnostic Tests - Medical Devices Pipeline ... sector report , "Alzheimer Diagnostic Tests - Medical ... Alzheimer Diagnostic Tests currently in pipeline stage. ... products with comparative analysis of the products at ... players involved in the pipeline product development. It ...
(Date:2/8/2016)... Devices - Medical Devices Pipeline Assessment, 2015 Summary ... Medical Devices Pipeline Assessment, 2015" provides an overview of ... This report is prepared using data sourced from in-house ... industry experts. *Note: Certain sections in the report ... and relevance of data in relation to the equipment ...
Breaking Medicine Technology: