‘Jumping genes’ may drive esophageal cancer, Cancer Research UK

July 10, 2015

“Cancer Research UK scientists have found that ‘jumping genes’ may add to the genetic chaos behind more than three-quarters of esophageal cancer cases, according to research published in BMC Genomics.

The scientists, from the University of Cambridge, used cutting-edge technology that can read DNA to study the genes of 43 esophageal tumour and blood samples to discover how much these mobile genetic sequences travel.

‘Jumping genes’, called L1 elements, can uproot themselves and move to new areas in the DNA, sometimes accidentally moving into genes that control the cell’s growth.

They found evidence that this happened around 100 times in each tumour sample, and in some tumours it happened 700 times.

If a jumping gene lands in or near an important gene that controls cell growth, it can wreak havoc, changing how the gene works so that it inadvertently tells the cell to grow and divide out of control – which could lead to cancer.

Study author Dr Paul Edwards, at the Cancer Research UK Cambridge Institute, said: “These jumping genes play hopscotch across our genetic code in cancer cells more than in normal cells. When one of these mobile genetic sequences plants itself in the middle of a gene that controls the cell’s growth it radically alters how the cell behaves, which can sometimes cause cancer.

“Research has shown that this might also happen in lung and bowel cancers. So it’s vital we find out more about how the cells do this in a bid to find ways to treat these cancers.”

The research is part of the International Cancer Genome Consortium (ICGC) – a global project using the latest gene sequencing technology to reveal the genetic changes behind cancer.  The esophageal cancer project is funded by Cancer Research UK.

Dr Kat Arney, Cancer Research UK’s science information manager, said: “Esophageal cancer is one of the hardest cancers to treat, and we are committed to funding more research to find out its underlying causes. These new findings reveal more about the genetic chaos that underpins esophageal tumours, and could one day help us develop better ways to diagnose, treat and monitor the disease.”

References: Paterson et al. Mobile element insertions are frequent in oesophageal adenocarcinomas and can mislead paired end sequencing analysis. BMC Genomics. DOI: 10.1186/s12864-015-1685-z.

This post is based on materials provided by Cancer Research UK.

 

 

The Salgi Esophageal Cancer Research Foundation is a 501 (c) (3) non profit organization as recognized by the Internal Revenue Service.

Content found on Salgi.org is for informational purposes only. The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.


Support Esophageal Cancer Awareness This #GivingTuesday

December 2, 2014

 

Today is Giving Tuesday! The Salgi Esophageal Cancer Research Foundation is honored to participate in this third annual event.  In 2012, a group of nonprofit professionals decided to create an annual day of giving.  They positioned it around the biggest days of consuming, Black Friday and Cyber Monday. Giving Tuesday opens the giving season and with your help, we will raise funds to spread awareness, encourage early detection and support research of esophageal cancer…in hopes of a cure.™  

How can you help make Giving Tuesday a success?

  • Help us get the word out on social media by visiting and liking our pages: Facebook, Twitter and Instagram;
  • Consider a donation: SALGI.org/donate, as a 501(c)(3) charity, all donations are tax-deductible;
  • Share photos of your loved ones who have been affected by esophageal cancer on social media. Tag us in the photos and we’ll re-post them on our pages;
  • Invite your co-workers, family members and friends to contribute by using the message below via social media or email:

 

I am supporting The Salgi Esophageal Cancer Research Foundation today on Giving Tuesday and I hope you will, too!  [Optional: Insert personal story/reason for helping.]  Did you know esophageal cancer is the fastest growing cancer in the US, according to the National Cancer Institute? You can support awareness and research efforts by making a tax-deductible donating online: SALGI.org/donate, and by sharing this information with your friends, family and colleagues by email or on Facebook and/or Twitter.  Thank you in advance!

 

Giving Tuesday helps to unite us in the spirit of giving and to bring a spotlight to esophageal cancer, a cause that needs desperate attention.  Let’s make this Giving Tuesday a great success! Thank you in advance for helping to make a difference today and every day.


Research findings could provide new insights into esophageal cancer, Barrett’s esophagus

October 20, 2014

Despite previous indications to the contrary, the esophagus does have its own pool of stem cells, said researchers from the University of Pittsburgh School of Medicine in an animal study published online today in Cell Reports.

The findings could lead to new insights into the development and treatment of esophageal cancer and the precancerous condition known as Barrett’s esophagus.

According to the National Cancer Institute, an estimated 18,170 people will be diagnosed with esophageal cancer in the U.S. in 2014 and an estimated 15,450  people will die from it. In Barrett’s esophagus, the lining of the esophagus changes for unknown reasons to resemble that of the intestine, though gastro-esophageal reflux disease or GERD is a risk factor for its development.

“The esophageal lining must renew regularly as cells slough off into the gastrointestinal tract,” said senior investigator Eric Lagasse, Pharm.D., Ph.D., associate professor of pathology, Pitt School of Medicine, and director of the Cancer Stem Cell Center at the McGowan Institute for Regenerative Medicine.

“To do that, cells in the deeper layers of the esophagus divide about twice a week to produce daughter cells that become the specialized cells of the lining. Until now, we haven’t been able to determine whether all the cells in the deeper layers are the same or if there is a subpopulation of stem cells there.”

 

The research team grew pieces or “organoids” of esophageal tissue from mouse samples, and then conducted experiments to identify and track the different cells in the basal layer of the tissue. They found a small population of cells that divide more slowly, are more primitive, can generate specialized or differentiated cells, and have the ability to self-renew, which is a defining trait of stem cells.

“It was thought that there were no stem cells in the esophagus because all the cells were dividing rather than resting or quiescent, which is more typical of stem cells,” Dr. Lagasse noted. “Our findings reveal that there indeed are esophageal stem cells, and rather than being quiescent, they divide slowly compared to the rest of the deeper layer cells.”

In future work, the researchers will examine human esophageal tissues for evidence of stem cell dysfunction in Barrett’s esophagus disease.”Some scientists have speculated that abnormalities of esophageal stem cells could be the origin of the tissue changes that occur in Barrett’s disease,” Dr. Lagasse said. “Our current and future studies could make it possible to test this long-standing hypothesis.”

Source:
University of Pittsburgh Schools of the Health Sciences. “Stem cells discovered in the esophagus.” ScienceDaily, 16 Oct. 2014

National Cancer Institute. “SEER Stat Fact Sheets: Esophageal Cancer.”

 

The Salgi Esophageal Cancer Research Foundation is a 501 (c) (3) non profit organization as recognized by the Internal Revenue Service.

Content found on Salgi.org is for informational purposes only. The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.