Navigation Links
Aurka-to-p53 signaling: A link between stem cell regulation and cancer

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
The Mount Sinai Hospital / Mount Sinai School of Medicine

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:
(Date:12/1/2015)... ... 01, 2015 , ... Integrated Rental Services (“Integrated Rental”), a ... LLC (“JII”). , With support from JII, Integrated Rental is poised for expansion ... centers, clinics, research labs and medical facilities across the United States. , General ...
(Date:12/1/2015)... ... December 01, 2015 , ... Califia Farms , ... that its iconic bottle has won top honors in Beverage World Magazine’s Global Packaging ... also announced that it has been selected as a 2015 U.S.A. Taste Champion in ...
(Date:12/1/2015)... (PRWEB) , ... December 01, 2015 , ... ... the 1980s we have seen vast improvements in scientific research and discoveries, leading ... strides, providing increased hope and relief to those affected by HIV/AIDS. Mediaplanet’s cross-platform ...
(Date:12/1/2015)... ... December 01, 2015 , ... The importance of volumetric ... the focus of numerous abstracts accepted for presentation here, at the 101st Annual ... abstracts highlight the use of Volpara Solutions’ quantitative breast imaging software tools for ...
(Date:12/1/2015)... (PRWEB) , ... December 01, 2015 , ... ... that it has been selected as a finalist in this year’s Fierce Innovation ... FierceMobileHealthcare. Next IT Healthcare was recognized as a finalist in the category of ...
Breaking Medicine News(10 mins):
(Date:12/1/2015)... A federal court has denied the state of ... filed by the Pharmaceutical Care Management Association (PCMA) challenging the ... law that forces employers and consumers to pay drugstores higher ... must now defend a law that raises health care ... Mark Merritt . --> Arkansas ...
(Date:12/1/2015)... 2015 Pharma Tech Outlook recently conducted a ... Data Management Solution Providers - 2015 .  After careful ... CEOs, CIOs, VCs, analysts, and the Pharma Tech Outlook ... top 10 clinical data management solution providers (check out ... and 36 respectively). --> ...
(Date:12/1/2015)... , Dec. 1, 2015  AccuTEC Blades, ... a new corporate logo and brand identity program. ... design and engineering of bladed products where "the ... --> --> Serving manufacturers and ... and auto glass equipment, AccuTEC,s product lines include ...
Breaking Medicine Technology: