Navigation Links
Aurka-to-p53 signaling: A link between stem cell regulation and cancer
Date:8/3/2012

Researchers at Mount Sinai School of Medicine, the University of Manchester, and the MD Anderson Cancer Center have found a new role for an oncogenic signaling pathway in embryonic stem cell (ESC) self-renewal and in reprogramming adult cells into an ESC-state, which will aid in the development of future cancer therapies.

The findings promote the understanding of the self-renewal mechanism in embryonic stem cells and provide insight into the role of Aurka, an oncoprotein that is amplified in several human cancers. The research is published in the August 3rd issue of the journal Cell Stem Cell.

Embryonic stem cells (ESCs) and, more recently, induced pluripotent stem cells (iPSCs) hold great promise for biomedicine as a major source of differentiated cells for developing new ways to study disease etiology, the development of more effective drugs and diagnostic methodologies, and for future transplantation-based therapies. Cancer cells and ESCs can both proliferate indefinitely and show some similarities.

The researchers, a team at Mount Sinai School of Medicine led by Ihor Lemischka, PhD, Director of the Black Family Stem Cell Institute, in collaboration with groups at the University of Manchester and the MD Anderson Cancer Center, applied a functional genomics strategy and identified the protein kinase Aurora A (Aurka) as an essential component of ESC function.

These studies showed that Aurka functions by inactivating the well-known tumor suppressor gene p53. The p53 protein acts as the "guardian of the genome" and mutations as well as deletions of the p53 gene are associated with a wide range of tumors.

In the absence of Aurka, up-regulated p53 signaling causes ESCs to differentiate and thus lose their stem cell state. By connecting the loss of Aurka to re-activation of p53 it was shown that Aurka adds a phosphate group (a process called phosphorylation) to a single amino acid in p53, thus shifting ESCs from a differentiation-prone state to self-renewal.

"These studies are exciting not only from a basic science point-of-view, but also because they suggest that stem cell research may impact the development of novel treatments for cancer. Conversely, cancer research may facilitate the realization of the biomedical potential of stem cells," said Dr. Lemischka.

Interestingly, in contrast to the low p53 levels in mature cells, this protein is highly expressed in ESCs and iPSCs. In addition, p53 has a limited role in promoting apoptosis the process of programmed cell death and cell cycle inhibition in pluripotent cells. The present findings provide a possible explanation to an unsolved mystery.

The study will aid in developing future cancer therapies and support the science underlying multiple clinical trials using Aurka inhibitors that are currently used to treat cancers.


'/>"/>

Contact: Ian Michaels
Ian.Michaels@mountsinai.org
212-241-9200
The Mount Sinai Hospital / Mount Sinai School of Medicine
Source:Eurekalert

Related medicine news :

1. Study finds significant skull differences between closely linked groups
2. Study: No link between depression, nasal obstruction
3. AADR comments on review that validates association between oral health and heart health
4. New research finds no association between white potato consumption (baked, boiled mashed) and obesity, Type 2 diabetes or systemic inflammation
5. Study shows link between pre-pregnancy obesity and lower test scores
6. First study investigating possible link between sunscreen ingredient and endometriosis
7. Early Study Hints at Link Between Certain Sunscreens, Endometriosis
8. Understanding the links between inflammation and chronic disease
9. 2 new studies show connection between sleepiness and pro-athlete careers
10. Science of parenting, the link between sexism and racism, death and the supernatural, and more
11. Infants cant distinguish between large and small groups
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 26, 2016 , ... PawPaws brand pet supplements owned by ... to enhance the health of felines. The formula is all-natural and is made from ... the PawPaws Cat Kidney Support Supplement Soft Chews are Astragalus Root Extract ...
(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)... ... June 25, 2016 , ... On Friday, June 10, Van Mitchell, Secretary ... Work award to iHire in recognition of their exemplary accomplishments in worksite health promotion. ... Maryland Workplace Health & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire ...
(Date:6/24/2016)... ... June 24, 2016 , ... Marcy was in a crisis. Her son James, eight, ... at his family verbally and physically. , “When something upset him, he couldn’t control his ... it. He would throw rocks at my other children and say he was going to ...
(Date:6/24/2016)... ... ... Topical BioMedics, Inc, makers of Topricin and MyPainAway Pain Relief Products, join The ‘Business for ... $12 an hour by 2020 and then adjusting it yearly to increase at the same ... wage, assure the wage floor does not erode again, and make future increases more predictable. ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... June 24, 2016 ... announced the addition of the " Global Markets ... This report focuses ... an updated review, including its applications in various applications. ... market, which includes three main industries: pharmaceutical and biotechnology, ...
(Date:6/24/2016)... , June 24, 2016 Research ... World Market for Companion Diagnostic Tests" report to their ... Market for Companion Diagnostics The World Market ... and personalized medicine diagnostics. Market analysis in the report includes ... Test Market (In Vitro Diagnostic Kits) by Region (N. America, ...
(Date:6/23/2016)... , June 23, 2016  MedSource announced today ... its e-clinical software solution of choice.  This latest ... possible value to their clients by offering a ... preferred relationship establishes nowEDC as the EDC platform ... MedSource,s full-service clients.  "nowEDC has long been a ...
Breaking Medicine Technology: