Corporate Banner
Satellite Banner
Scientific Community
Become a Member | Sign in
Home>News>This Article

Blocking Key Enzyme in Cancer Cells Could Lead to New Therapy

Published: Tuesday, August 06, 2013
Last Updated: Tuesday, August 06, 2013
Bookmark and Share
Researchers have identified a characteristic unique to cancer cells in an animal model of cancer.

An enzyme that metabolizes the glucose needed for tumor growth is found in high concentrations in cancer cells, but in very few normal adult tissues. Deleting the gene for the enzyme stopped the growth of cancer in laboratory mice, with no associated adverse effects, reports Nissim Hay, UIC professor of biochemistry and molecular genetics, and his colleagues in the August 12 issue of Cancer Cell.

Targeting glucose metabolism for cancer therapy — while avoiding adverse effects in other parts of the body — has been a “questionable” strategy, Hay said. But he and his coworkers showed that the glucose-metabolism enzyme hexokinase-2 can be almost completely eliminated in adult mice without affecting normal metabolic functions or lifespan.

Hexokinase-2 is abundant in embryos but absent in most adult cells, where related enzymes take over its role in metabolism. One of the changes that mark a cell as cancerous is expression of the embryonic enzyme. Hay and his colleagues showed that the embryonic version is required for cancer cells to proliferate and grow, and that eliminating it halts tumor growth.

They developed a mouse strain in which they could silence or delete the HK2 gene in the adult animal, and they found that these mice could not develop or sustain lung or breast cancer tumors but were otherwise normal and healthy.

“We have deleted the HK2 gene systemically in these mice, and they have been living for more than two years now. Their lifespan is the same as normal mice,” Hay said.

The researchers also looked at human lung and breast cancer cells in the lab, and found that if they eliminated all HK2, the cells stopped growing.

“We think that the process we used to delete the HK2 gene is not absolutely perfect, so there must be some low levels of HK2 in the mice. But that seems to be enough for the cells that use HK2, and the therapeutic effects on tumors in these mice are stable.”

Hay thinks the enzyme is involved in making the building-blocks for the DNA of cancer cells, which need lots of all cellular components as they rapidly divide.

“Without HK2, the cancer cells don’t make enough DNA for new cells, and so tumor growth comes to a standstill,” said Hay.

Further Information
Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 2,800+ scientific posters on ePosters
  • More than 4,000+ scientific videos on LabTube
  • 35 community eNewsletters

Sign In

Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Two Proteins Play Key Role in Rheumatoid Arthritis
The protein molecules that fit together as lock and key seem to promote the abnormal formation of blood vessels in joints affected by rheumatoid arthritis.
Friday, May 16, 2014
Scientific News
Exploring the Causes of Cancer
Queen's research to understand the regulation of a cell surface protein involved in cancer.
Measuring microRNAs in Blood to Speed Cancer Detection
A simple, ultrasensitive microRNA sensor holds promise for the design of new diagnostic strategies and, potentially, for the prognosis and treatment of pancreatic and other cancers.
Novel Proteins Linked to Huntington's Disease
University of Florida Health researchers have made a new discovery about Huntington's disease, showing that the gene that causes the fatal disorder makes an unexpected "cocktail" of mutant proteins that accumulate in the brain.
Enzyme Critical to Maintaining Telomere Length Discovered
New method expected to speed understanding of short telomere diseases and cancer.
New Method Identifies Up to Twice as Many Proteins and Peptides
An international team of researchers developed a method that identifies up to twice as many proteins and peptides in mass spectrometry data than conventional approaches.
Metabolic Profiles Distinguish Early Stage Ovarian Cancer with Unprecedented Accuracy
Studying blood serum compounds of different molecular weights has led scientists to a set of biomarkers that may enable development of a highly accurate screening test for early-stage ovarian cancer.
New Way to Force Stem Cells to Become Bone Cells
Potential therapies based on this discovery could help people heal bone injuries or set hardware, such as replacement knees and hips.
Long-Sought Protein Sensor for the ‘Sixth Sense’ Discovered
In a study led by scientists from The Scripps Research Institute (TSRI)the sensor protein for propioception has been identified.
How Viruses Commandeer Human Proteins
Researchers have produced the first image of an important human protein as it binds with ribonucleic acid (RNA), a discovery that could offer clues to how some viruses, including HIV, control expression of their genetic material.
Tracking How Herpes Simplex Virus Moves Through Cells
In a recent study, Derek Walsh, PhD, associate professor of Microbiology-Immunology, and his team showed how the herpes simplex virus (HSV) exploits microtubule plus-end tracking proteins to initiate transport and infection in human cells.
Scroll Up
Scroll Down
Skyscraper Banner

Skyscraper Banner
Go to LabTube
Go to eposters
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
2,800+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,000+ scientific videos