p53 Protein News and Research

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The TP53 is a gene that instructs the cell to produce tumor protein (p53) ; a vital transcription factor and tumor suppressor. P53 is known as the “guardian of the genome” as it helps in regulating the cell cycle and acts as a tumor suppressor.

Biochemists reveal interaction between tumor suppressor protein and chaperone

Every cell has thousands of proteins whose activity and lifetime must be regulated to control the cellular life cycle from cell division to cell death. The heat shock protein Hsp90 plays a key role in this process. It is a so-called chaperone, a quality controller, as it were. It monitors and controls the quality and activity of many important signal proteins and helps them take on the right form. When the cell is exposed to high stress levels from heat or a lack of oxygen, Hsp90 is produced in larger quantities to shield its partner proteins from damage.

8 Sep 2011

Study: E-waste linked to adverse effects on human health

In addition to its damaging effect on the environment and its illegal smuggling into developing countries, researchers have now linked e-waste to adverse effects on human health, such as inflammation and oxidative stress - precursors to cardiovascular disease, DNA damage and possibly cancer.

31 May 2011

Researchers untangle two distinct ways in which tumor-suppressor protein works

Researchers at the Stanford University School of Medicine have untangled two distinct ways in which a common, naturally occurring "tumor-suppressor" protein works.

13 May 2011

Protein aggregation plays a significant role in cancer

Protein aggregation, generally associated with Alzheimer's and mad cow disease, turns out to play a significant role in cancer. In a paper published in Nature Chemical Biology, Frederic Rousseau and Joost Schymkowitz of VIB, K.U.Leuven and Vrije Universiteit Brussel describe that certain mutations of p53, an important tumor suppressor, cause the protein to misfold in a way that the proteins start to aggregate.

29 Mar 2011

ITCs in vegetables appear to target and block p53 gene linked with cancer

Scientists are reporting discovery of a potential biochemical basis for the apparent cancer-fighting ability of broccoli and its veggie cousins. They found for the first time that certain substances in the vegetables appear to target and block a defective gene associated with cancer.

10 Mar 2011

New insight: p53 protein controls molecular crossroads in glucose metabolic pathway

The gene for the protein p53 is the most frequently mutated in human cancer. It encodes a tumor suppressor, and traditionally researchers have assumed that it acts primarily as a regulator of how genes are made into proteins.

3 Mar 2011

p53 gene blocks EMT essential to cancer metastasis

Like a bounty hunter returning escapees to custody, a cancer-fighting gene converts organ cells that change into highly mobile stem cells back to their original, stationary state, researchers report online at Nature Cell Biology.

28 Feb 2011

Mechanism of cancer treatment related to infertility in women

Chemotherapeutic agents, used in cancer treatment, destroy not only cancer cells but also healthy cells, thus affecting germ cells as well. Consequently, after surviving cancer many female patients are confronted with the diagnosis: infertility. For a long time a relationship between infertility and chemotherapeutic agents has been assumed, but until now, the exact mechanism was not known.

23 Feb 2011

p53 activation offers a novel strategy for cancer therapy

A pioneering clinical trial is testing the effectiveness in leukemia of a small molecule that shuts down MDM2, a protein that can disable the well-known tumor suppressor p53.

9 Dec 2010

Reactivating three silenced molecules may provide new strategy to treat multiple myeloma

New research links three molecules to a critical tumor suppressor gene that is often turned off in multiple myeloma, a presently incurable cancer of the blood.

27 Oct 2010

Researchers identify body's control switch system to eliminate damaged cells

St. Jude Children's Research Hospital scientists discovered a new mechanism cells use to maximize production of a key protein following DNA damage and demonstrated the potential of small molecules to regulate the process and protect healthy tissue.

14 Sep 2010

Research finds adenovirus impact on cell's suicide program pave way for new cancer therapy

A novel mechanism used by adenovirus to sidestep the cell's suicide program, could go a long way to explain how tumor suppressor genes are silenced in tumor cells and pave the way for a new type of targeted cancer therapy, report researchers at the Salk Institute for Biological Studies in the Aug. 26, 2010 issue of Nature.

26 Aug 2010

AMPK may regulate epigenetic mechanism: Research

AMP-activated protein kinase, or AMPK, is a master regulator protein of metabolism that is conserved from yeast to humans. When a cell is low on fuel, AMPK shuts down processes that use energy and turns on processes that produce energy.Biologists have been studying how AMPK works for several decades and know that once it is activated, AMPK turns on a large number of genes by passing the "make more energy" message through numerous signaling cascades in the cell. What was not known, until now, was that AMPK also works via an epigenetic mechanism to slow down or stop cell growth.

17 Jul 2010

Scientists explain mechanism behind acute myeloid leukemia

New research by scientists at Cold Spring Harbor Laboratory (CSHL) has illuminated in fine detail one of the genetic paths that leads to a particularly aggressive form of leukemia.

2 Jul 2010

Study demonstrates p53 protein becomes activated during gamete formation

Protein p53 is known as the guardian of the genome since it is basic for the genome's integrity by preventing the accumulation of mutations originating either by the cell's own mechanisms or by the action of external agents.

11 Jun 2010

Study identifies mechanism that interrupts normal p53 gene function leading to tumor development

The p53 gene has been a well-documented player in the prevention of tumors. It is considered the most frequently mutated gene in human tumors with more than half harboring p53 mutations (Bennett et al., 1999). These mutations often can be caused by disruption in normal p53 function.

11 Jun 2010

Ascenta Therapeutics, sanofi-aventis sign global licensing agreement for cancer drug candidates

Ascenta Therapeutics announced today the signing of a global collaboration and licensing agreement with sanofi-aventis covering several early-stage agents being investigated for their potential to restore tumor cell apoptosis (programmed cell death). These orally-active, small-molecule drug candidates inhibit the interaction between HDM2 (Human Double Minute 2) and p53, removing a block to normal p53 tumor suppressor function and potentially enhancing cancer control and treatment.

4 Jun 2010

New p53 knockout rat model improves timelines for carcinogenicity screening

Sigma Life Science, the innovative biological products and services brand of Sigma-Aldrich, today introduced the world's first p53 'knockout' rat model, an important development that is expected to, due to the rat's closer physiological and metabolic similarity to humans, significantly improve timelines for carcinogenicity screening and reduce time to market for therapeutics.

19 Apr 2010

Gene defect promotes aggressive forms of ovarian cancer

CANCER RESEARCH UK scientists have discovered how mistakes in a key gene drive the early stages of aggressive ovarian cancers. This could improve diagnosis of aggressive forms of the disease and lead to new treatments, according to a study published in the Journal of Pathology this month.

15 Apr 2010

Brain stem cells in subventricular zone characterized by transcription factor Protein Tlx

The "cradle" of new neurons in the adult brain is well known. It is what is called the subventricular zone, a tissue structure lining the lateral ventricles. This is where neural or brain stem cells reside, which are responsible for generating new neurons if needed. For many years now, the subventricular zone has been suspected to be the origin of specific malignant brain tumors called gliomas, the most deadly type of which is glioblastoma.

2 Apr 2010