Accessibility Statement Skip Navigation
  • Why PRWeb
  • How It Works
  • Who Uses It
  • Pricing
  • Login
  • GDPR
  • Create a Free Account
Return to PRWeb homepage
  • News
  • Resources
  • Contact
When typing in this field, a list of search results will appear and be automatically updated as you type.

Searching for your content...

No results found. Please change your search terms and try again.
  • News in Focus
      • Browse News Releases

      • All News Releases
      • Multimedia Gallery

      • All Multimedia
      • All Photos
      • All Videos
  • Business & Money
      • Auto & Transportation

      • Aerospace, Defense
      • Air Freight
      • Airlines & Aviation
      • Automotive
      • Maritime & Shipbuilding
      • Railroads and Intermodal Transportation
      • Supply Chain/Logistics
      • Transportation, Trucking & Railroad
      • Travel
      • Trucking and Road Transportation
      • View All Auto & Transportation

      • Business Technology

      • Blockchain
      • Broadcast Tech
      • Computer & Electronics
      • Computer Hardware
      • Computer Software
      • Data Analytics
      • Electronic Commerce
      • Electronic Components
      • Electronic Design Automation
      • Financial Technology
      • High Tech Security
      • Internet Technology
      • Nanotechnology
      • Networks
      • Peripherals
      • Semiconductors
      • View All Business Technology

      • Entertain­ment & Media

      • Advertising
      • Art
      • Books
      • Entertainment
      • Film and Motion Picture
      • Magazines
      • Music
      • Publishing & Information Services
      • Radio & Podcast
      • Television
      • View All Entertain­ment & Media

      • Financial Services & Investing

      • Accounting News & Issues
      • Acquisitions, Mergers and Takeovers
      • Banking & Financial Services
      • Bankruptcy
      • Bond & Stock Ratings
      • Conference Call Announcements
      • Contracts
      • Cryptocurrency
      • Dividends
      • Earnings
      • Earnings Forecasts & Projections
      • Financing Agreements
      • Insurance
      • Investments Opinions
      • Joint Ventures
      • Mutual Funds
      • Private Placement
      • Real Estate
      • Restructuring & Recapitalization
      • Sales Reports
      • Shareholder Activism
      • Shareholder Meetings
      • Stock Offering
      • Stock Split
      • Venture Capital
      • View All Financial Services & Investing

      • General Business

      • Awards
      • Commercial Real Estate
      • Corporate Expansion
      • Earnings
      • Environmental, Social and Governance (ESG)
      • Human Resource & Workforce Management
      • Licensing
      • New Products & Services
      • Obituaries
      • Outsourcing Businesses
      • Overseas Real Estate (non-US)
      • Personnel Announcements
      • Real Estate Transactions
      • Residential Real Estate
      • Small Business Services
      • Socially Responsible Investing
      • Surveys, Polls and Research
      • Trade Show News
      • View All General Business

  • Science & Tech
      • Consumer Technology

      • Artificial Intelligence
      • Blockchain
      • Cloud Computing/Internet of Things
      • Computer Electronics
      • Computer Hardware
      • Computer Software
      • Consumer Electronics
      • Cryptocurrency
      • Data Analytics
      • Electronic Commerce
      • Electronic Gaming
      • Financial Technology
      • Mobile Entertainment
      • Multimedia & Internet
      • Peripherals
      • Social Media
      • STEM (Science, Tech, Engineering, Math)
      • Supply Chain/Logistics
      • Wireless Communications
      • View All Consumer Technology

      • Energy & Natural Resources

      • Alternative Energies
      • Chemical
      • Electrical Utilities
      • Gas
      • General Manufacturing
      • Mining
      • Mining & Metals
      • Oil & Energy
      • Oil and Gas Discoveries
      • Utilities
      • Water Utilities
      • View All Energy & Natural Resources

      • Environ­ment

      • Conservation & Recycling
      • Environmental Issues
      • Environmental Policy
      • Environmental Products & Services
      • Green Technology
      • Natural Disasters
      • View All Environ­ment

      • Heavy Industry & Manufacturing

      • Aerospace & Defense
      • Agriculture
      • Chemical
      • Construction & Building
      • General Manufacturing
      • HVAC (Heating, Ventilation and Air-Conditioning)
      • Machinery
      • Machine Tools, Metalworking and Metallurgy
      • Mining
      • Mining & Metals
      • Paper, Forest Products & Containers
      • Precious Metals
      • Textiles
      • Tobacco
      • View All Heavy Industry & Manufacturing

      • Telecomm­unications

      • Carriers and Services
      • Mobile Entertainment
      • Networks
      • Peripherals
      • Telecommunications Equipment
      • Telecommunications Industry
      • VoIP (Voice over Internet Protocol)
      • Wireless Communications
      • View All Telecomm­unications

  • Lifestyle & Health
      • Consumer Products & Retail

      • Animals & Pets
      • Beers, Wines and Spirits
      • Beverages
      • Bridal Services
      • Cannabis
      • Cosmetics and Personal Care
      • Fashion
      • Food & Beverages
      • Furniture and Furnishings
      • Home Improvement
      • Household, Consumer & Cosmetics
      • Household Products
      • Jewelry
      • Non-Alcoholic Beverages
      • Office Products
      • Organic Food
      • Product Recalls
      • Restaurants
      • Retail
      • Supermarkets
      • Toys
      • View All Consumer Products & Retail

      • Entertain­ment & Media

      • Advertising
      • Art
      • Books
      • Entertainment
      • Film and Motion Picture
      • Magazines
      • Music
      • Publishing & Information Services
      • Radio & Podcast
      • Television
      • View All Entertain­ment & Media

      • Health

      • Biometrics
      • Biotechnology
      • Clinical Trials & Medical Discoveries
      • Dentistry
      • FDA Approval
      • Fitness/Wellness
      • Health Care & Hospitals
      • Health Insurance
      • Infection Control
      • International Medical Approval
      • Medical Equipment
      • Medical Pharmaceuticals
      • Mental Health
      • Pharmaceuticals
      • Supplementary Medicine
      • View All Health

      • Sports

      • General Sports
      • Outdoors, Camping & Hiking
      • Sporting Events
      • Sports Equipment & Accessories
      • View All Sports

      • Travel

      • Amusement Parks and Tourist Attractions
      • Gambling & Casinos
      • Hotels and Resorts
      • Leisure & Tourism
      • Outdoors, Camping & Hiking
      • Passenger Aviation
      • Travel Industry
      • View All Travel

  • Policy & Public Interest
      • Policy & Public Interest

      • Advocacy Group Opinion
      • Animal Welfare
      • Congressional & Presidential Campaigns
      • Corporate Social Responsibility
      • Domestic Policy
      • Economic News, Trends, Analysis
      • Education
      • Environmental
      • European Government
      • FDA Approval
      • Federal and State Legislation
      • Federal Executive Branch & Agency
      • Foreign Policy & International Affairs
      • Homeland Security
      • Labor & Union
      • Legal Issues
      • Natural Disasters
      • Not For Profit
      • Patent Law
      • Public Safety
      • Trade Policy
      • U.S. State Policy
      • View All Policy & Public Interest

  • People & Culture
      • People & Culture

      • Aboriginal, First Nations & Native American
      • African American
      • Asian American
      • Children
      • Diversity, Equity & Inclusion
      • Hispanic
      • Lesbian, Gay & Bisexual
      • Men's Interest
      • People with Disabilities
      • Religion
      • Senior Citizens
      • Veterans
      • Women
      • View All People & Culture

  • Hamburger menu
  • Cision PRWeb provides efficient communication tools to continuously engage with target audiences across multiple online channels
  • Create a Free Account
    • ALL CONTACT INFO
    • Contact Us


      11AM ET Sunday – 8PM ET Friday

  • Send a Release
  • Sign up
  • Log in
  • Resources
  • RSS
  • GDPR
  • News in Focus
    • Browse All News
    • Multimedia Gallery
  • Business & Money
    • Auto & Transportation
    • Business Technology
    • Entertain­ment & Media
    • Financial Services & Investing
    • General Business
  • Science & Tech
    • Consumer Technology
    • Energy & Natural Resources
    • Environ­ment
    • Heavy Industry & Manufacturing
    • Telecomm­unications
  • Lifestyle & Health
    • Consumer Products & Retail
    • Entertain­ment & Media
    • Health
    • Sports
    • Travel
  • Policy & Public Interest
  • People & Culture
    • People & Culture
  • Send a Release
  • Sign up
  • Log in
  • Resources
  • RSS
  • GDPR
  • Send a Release
  • Sign up
  • Log in
  • Resources
  • RSS
  • GDPR
  • Send a Release
  • Sign up
  • Log in
  • Resources
  • RSS
  • GDPR

Nobel Laureate, New Technologies Show How Cancer Cells Protect Chromosomes from Decay
  • USA - English


News provided by

University of Colorado Cancer Center

Aug 18, 2016, 13:00 ET

Share this article

Share toX

Share this article

Share toX

Telomerase augments telomeres, which protect a cell's chromosomes
Telomerase augments telomeres, which protect a cell's chromosomes

Aurora, Colo. (PRWEB) August 18, 2016 -- As the rope of a chromosomes replicates, it frays at the ends. No problem: A chromosome’s ends have extra twine so that fraying doesn’t reach into the body of the rope where the important information resides. This extra twine is called a “telomere”. Over time and across replications, this telomere twine breaks down until the chromosome loses its protective ends and this “fraying” reaches into the rope, wrecking the chromosome and resulting in the death of the cell.

Knowing where a drug blocks the ability of telomerase to lengthen telomeres could have broad applicability for diverse cancers.

Post this

This is all well and good – eventual cell death is as it should be. Without cell death, there is cell immortality and with cell immortality there is cancer. Cancer cells counteract the breakdown of telomeres by building them up as quickly as they are degraded. A cancer cell does this by spackling a telomere with the enzyme telomerase. Basically, when telomerase finds and attaches to a telomere, it adds a repeating DNA sequence to the repeating DNA sequences that are already in place, lengthening the telomere and adding to the chromosome’s protective ends.

Oncologists and cancer researchers wish that telomerase would not do this. Without this constant telomere repair, chromosomes would eventually degrade and cancer cells would die. Without the interaction of telomerase with telomeres, cancer cells would be mortal.

A study led by University of Colorado Cancer Center investigator, Thomas Cech, PhD, CU Boulder Distinguished Professor, Nobel laureate, and director of CU’s BioFrontiers Institute, uses CRISPR gene editing technology (shortlisted for the Nobel Prize) and live cell, single molecule microscopy (which led to the 2014 Nobel Prize in Chemistry for unaffiliated researchers Betzig, Hell and Moerner) to watch in real-time, for the first time, this essential interaction between telomerase and telomeres. Results are published in the journal Cell.

What Cech and co-authors Jens Schmidt, PhD, Damon Runyon Cancer Foundation postdoctoral fellow and staff scientist Arthur Zaug saw is that telomerase diffuses throughout the cell nucleus, bumping into things. Neither telomerase nor telomeres are common in the nucleus but sometimes chance has it that the first hits the second. But it doesn’t do any good for telomerase to attach at a telomere midpoint. To protect the chromosome, telomerase must attach at the very end of the rope. So if telomerase hits the middle of a telomere, it soon detaches and tries again. Cech and colleagues call this “probing”. Only if probing results in a direct hit at the end of the telomere does telomerase attach and stay.

“It’s like looking through TripAdvisor for a place you want to stay,” Cech says. “You probe different hotels and finally you find one that has all the features you want.”

Cech calls this mechanism “plausibly the simplest way that a rare little machine can find its very rare landing site within the complex landscape of the nucleus.”

Think about it: Telomerase diffuses evenly through the nucleus. When it happens to hit anywhere on a telomere, it sticks briefly, thus increasing the concentration of telomerase near telomeres and thus increasing the chance that telomerase will happen to hit a telomere end where it can attach securely.

The group was able to make this process visible by using the CRISPR DNA editing technology to insert code into the gene that makes telomerase. This inserted code manufactured a fluorescent protein, which was attached to telomerase. The group then used what some call nanoscopy to see this fluorescent protein.

“The amazing thing to me is that three years ago, you couldn’t have done any of this. This is how fast things are moving in biology, just rocketing ahead,” Cech says.

Previously, looking close enough to see the fluorescence of a single protein would have required “fixing” the cell and visualizing it with a microscope. It would have been a snapshot. The ability to see the processes inside a live cell at this magnification is like shooting video.

“With this fixed cell imaging, we didn’t see the dynamics,” Cech says. “And the rapidly diffusing telomerase is invisible, washed out or lost in the background.”

Cech points out that this technique of CRISPR-aided nanoscopy will likely be used by scientists outside the field of telomere research. He also hopes this specific finding will aid in screening anti-telomerase drugs.

“Right now we don’t have a great telomerase inhibitor. We don’t know at which step our first generation of these drugs is interfering so we don’t know how to optimize these drug candidates for anti-cancer effect,” Cech says. Does a drug prevent the assembly of telomerase? Does it keep telomerase from moving near telomeres? Does it prevent probing? Does it prevent telomerase from finding a telomere end?

“Knowing where a drug blocks the ability of telomerase to lengthen telomeres could have broad applicability for diverse cancers,” Cech says.

Garth Sundem, University of Colorado Cancer Center, http://www.coloradocancerblogs.org, +1 (805) 559-2023, [email protected]

Modal title

Contact PRWeb

  • 11AM ET Sunday – 8PM ET Friday
  • Contact Us

About PRWeb

  • About PRWeb
  • Partners
  • Partnership Programs
  • Editorial Guidelines
  • Resources

Why PRWeb

  • Why PRWeb
  • How It Works
  • Who Uses It
  • Pricing

Accounts

  • Create a Free Account
  • Log in
  • Contact Us

Do not sell or share my personal information:

  • Submit via [email protected] 
  • Call Privacy toll-free: 877-297-8921

Contact Cision

Products

About

My Services
  • All News Releases
  • Online Member Center
  • ProfNet
Cision Distribution Helpline
888-776-0942
  • Legal
  • Site Map
  • RSS
  • Cookie Settings
Copyright © 2025 Cision US Inc.