Navigation Links
Entire T-cell receptor repertoire sequenced revealing extensive and unshared diversity
Date:2/23/2011

February 24, 2011 T-cell receptor diversity in blood samples from healthy individuals has been extensively cataloged for the first time in a study published online today in Genome Research (www.genome.org), setting the stage for a better understanding of infectious disease, cancer, and immune system disorders.

Adaptive immunity is mediated by T-cells, a white blood cell that identifies and attacks cells that may be infected with viruses or contain cancer-causing mutations. To recognize a wide array of potentially infectious agents or cancer-causing mutations, gene shuffling creates a highly variable and diverse collection of T-cell receptor sequences.

While the diversity of sequences in immune cell repertoires has been investigated previously, no study had yet been able to capture the entire range present in an individual sample. Now, using next-generation sequencing technology, researchers in Canada have identified essentially all T-cell receptor variants in blood samples, identifying more than one million unique sequences.

Dr. Robert Holt of the BC Cancer Agency and Simon Fraser University, senior author of the report, explained that this study is the first to establish that while there is high T-cell diversity in a standard blood sample, it does not give the entire picture. "This is only part of the diversity that would be present within a person's entire body," Holt said, "but now we know that although the diversity is very large, it is ultimately limited, and it is measureable."

The group found that some T-cell receptor sequences are common, some are rare, and the repertoire can change over time. The individual repertoire was then compared to that of two other individuals, showing that only a minority of sequences is shared between them.

Interestingly, they noted that for sequences that were shared, different gene shuffling events had often generated the same sequence. "This shows that certain sequences are more favored than others, most likely because they are more effective in recognizing specific types of infections or mutations," said Holt.

By cataloging the baseline diversity of the immune repertoire in a healthy individual, Holt explained that future studies would be able to then recognize how the repertoire is disturbed in cases of immune challenge, such as infectious disease or organ transplantation, and furthermore, may assist in the development of new vaccines.


'/>"/>

Contact: Peggy Calicchia
calicchi@cshl.edu
516-422-4012
Cold Spring Harbor Laboratory
Source:Eurekalert

Related medicine news :

1. Entire Family Genome Sequenced for First Time
2. Yantra Mat USA Introduces the Yantra Kit: Bringing the Health Benefits of Acupressure to the Entire Body
3. Study finds key protein controls T-cell proliferation
4. Scott & White Healthcare study aimed at T-cell lymphoma
5. Pharmacokinetic/Pharmacodynamic Data Support Further Development of Tobiras Next-Generation CCR5 Receptor Antagonist
6. New Guidelines Issued on Hormone Receptor Testing for Breast Cancer
7. Cell study finds receptor can fight tamoxifen-resistant breast cancer cells
8. Estrogen receptor status of HER2+ breast cancer correlates with response to anti-HER therapies
9. Androgen receptor may explain male dominance in liver cancer
10. CD74 serves as a survival receptor on colon epithelial cells
11. Nicotine binding to receptor linked to breast cancer cell growth
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... 25, 2016 , ... Experts from the American Institutes for ... Meeting June 26-28, 2016, at the Hynes Convention Center in Boston. , AIR ... care planning, healthcare costs and patient and family engagement. , AIR researchers will ...
(Date:6/25/2016)... ... 25, 2016 , ... The temporary closing of Bruton Memorial Library on June 21 due to ... a new, often overlooked aspect of head lice: the parasite’s ability to live away from ... common occurrence, but a necessary one in the event that lice have simply gotten out ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... First ... United States, named Dr. Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell ... facility Medical Director of our new Mesquite location,” said Dr. James M. Muzzarelli, Executive ...
(Date:6/25/2016)... ... June 25, 2016 , ... Dr. ... from injury. Recently, he has implemented orthobiologic procedures as a method for treating ... one of the first doctors to perform the treatment. Orthobiologics are substances that ...
(Date:6/25/2016)... Canada (PRWEB) , ... June 25, 2016 , ... Conventional ... pursuit of success. In terms of the latter, setting the bar too high can ... risk more than just slow progress toward their goal. , Research from ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 24, 2016 The Academy of Managed Care ... that would allow biopharmaceutical companies to more easily ... make formulary and coverage decisions, a move that addresses ... medicines. The recommendations address restrictions in the ... the drug label, a prohibition that hinders decision makers ...
(Date:6/24/2016)... DUBLIN , June 24, 2016 ... "The World Market for Companion Diagnostic Tests" report to ... World Market for Companion Diagnostics The World ... diagnostic and personalized medicine diagnostics. Market analysis in the report ... Diagnostics Test Market (In Vitro Diagnostic Kits) by Region (N. ...
(Date:6/24/2016)... , Belgium , June 24, ... VNRX), today announced the appointment of Dr. ... Directors as a Non-Executive Director, effective June 23, ... Audit, Compensation and Nominations and Governance Committees.  As ... Futcher will provide independent expertise and strategic counsel ...
Breaking Medicine Technology: