Navigation Links
A*STAR scientists bring to light mechanism of drug for infections
Date:11/14/2013

1. Scientists at A*STAR's Singapore Immunology Network (SIgN) have discovered the exact mode of action by plerixafor, a drug commonly prescribed to stimulate immune responses in patients suffering from neutropenia, which causes them to become prone to oral, skin, genital infections and in worst cases, a fatal whole-body infection . A better understanding of the drug's mechanism can improve its usage to more effectively reduce risk of infections in these patients.

2. Scientists at SIgN employed cutting-edge imaging techniques to analyze the effects of plerixafor on the white blood cell activity in the study which was published in the Journal of Experimental Medicine (JEM). Neutrophil Mobilization via Plerixafor

3. Neutropenia is a condition characterized by the lack of a type of white blood cells, also known as neutrophils , in one's blood circulation. Plerixafor increases the concentration of these white blood cells in the blood by inhibiting a protein called CXCR4. This inhibition prevents neutrophils in the blood stream from returning to the bone marrow, which is the primary compartment where the white blood cells are stored and released. It is therefore commonly accepted that the efficacy of the drug arises only from the release of these white blood cells from the bone marrow.

4. However, scientists at SIgN found that the inhibition of CXCR4 by the drug actually plays a dual role It increases the neutrophil count in the blood through their release from the lungs, while simultaneously promoting their retention in the blood stream. Discovery of this additional mode of action not only provides a deeper understanding on the drug's mechanism, it also contributes to a more effective utilization of the drug. The ground-breaking study creates the possibility of using a combined drug treatment to maximise release of white blood cells from both the bone marrow and the lungs. The approach may be more effective in reducing the risk of bacterial infections in neutropenic patients.

5. The team leader, Dr Ng Lai Guan from SIgN said, "We have identified the precise mechanisms of plerixafor treatment, which has important implications on its usage. We can understand through this study the effectiveness or limitations of the drug on certain patients and thereafter craft new clinical approaches to better treat them. Our study forms a conceptual framework to establish improved therapeutic strategies for neutropenia."

6. Acting Executive Director of SIgN, Associate Professor Laurent Rnia, said, "Basic research as such is important for us to fully understand how drugs work, so that we can put them to best use. This is a study which can potentially be translated into clinical applications to impact the health and lives of neutropenic patients."


'/>"/>

Contact: Tan Yun Yun
tan_yun_yun@a-star.edu.sg
65-682-66273
Agency for Science, Technology and Research (A*STAR), Singapore
Source:Eurekalert

Related medicine news :

1. A*STAR scientists discover switch to boost anti-viral response to fight infectious diseases
2. Fruit flies light the way for A*STAR scientists to pinpoint genetic changes that spell cancer
3. A*STAR scientists identify potential drug target for inflammatory diseases including cancers
4. Singapore scientists led by A*STARs GIS identify 4 mechanisms that contribute to gastric cancers
5. A*STAR scientists discover switch critical to wound healing
6. A*STAR scientist Alex Matter awarded prestigious Szent-Györgyi Prize for progress in cancer
7. A*STAR scientist wins European Molecular Biology Organization Young Investigator award
8. A*STAR scientists uncover potential drug target to nip cancer in the bud
9. Scientists solving the mystery of human consciousness
10. Scientists uncover multiple faces of deadly breast cancer
11. Scientists identify major source of cells defense against oxidative stress
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... 27, 2016 , ... TherapySites, the leading website ... Tennessee Counseling Association. This new relationship allows TherapySites to continue to ... adding exclusive benefits and promotional offers. , "TCA is extremely excited about this ...
(Date:6/26/2016)... ... June 27, 2016 , ... Quality metrics are proliferating ... many ways they remain in the eye of the beholder, according to experts who ... of The American Journal of Managed Care. For the full issue, click here ...
(Date:6/26/2016)... ... ... Kasmer, a legally blind and certified personal trainer is helping to develop a weight loss ... plans to fix the two major problems leading the fitness industry today:, ... , They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... ... ... of Bruton Memorial Library on June 21 due to a possible lice infestation, as reported ... head lice: the parasite’s ability to live away from a human host, and to infest ... in the event that lice have simply gotten out of control. , As lice are ...
(Date:6/25/2016)... ... June 25, 2016 , ... Dr. Calvin Johnson has ... he has implemented orthobiologic procedures as a method for treating his patients. The ... first doctors to perform the treatment. Orthobiologics are substances that orthopaedic surgeons use ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... SAN CLEMENTE, Calif. , June 24, 2016 /PRNewswire/ ... pulmonary function testing company, is now able to perform sophisticated lung ... ndd Medical Technologies , Inc. Patients are ... labs.  Thanks to ndd,s EasyOne PRO ® , ARL patients like ... any needed testing done in the comfort of her own home. ...
(Date:6/24/2016)... , June 24, 2016 ... appointment of Dr. Edward Futcher to ... Director, effective June 23, 2016.Dr. Futcher was also ... and Governance Committees.  As a non-executive member of ... expertise and strategic counsel to VolitionRx in connection ...
(Date:6/23/2016)... June 23, 2016 Any dentist who has made ... the current process. Many of them do not even offer ... difficulties and high laboratory costs involved. And those who ARE ... at such a high cost that the majority of today,s ... Dr. Parsa Zadeh , founder of Dental Evolutions Inc. ...
Breaking Medicine Technology: