Accessibility Statement Skip Navigation
  • Resources
  • Blog
  • Journalists
  • +44 (0)20 7454 5110
  • Client Login
  • Send a Release
Return to PR Newswire homepage
  • News
  • Products
  • 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 Public Company News
      • All Multimedia News
      • View All News Releases

      • Regulatory News

      • D/A/CH Regulatory News
      • UK Regulatory News
      • View All Regulatory News

  • Business & Money
      • Auto & Transportation

      • Aerospace & Defense
      • Air Freight
      • Airlines & Aviation
      • Automotive
      • Maritime & Shipbuilding
      • Railroads & Intermodal Transportation
      • Supply Chain/Logistics
      • Transportation, Trucking & Railroad
      • Travel
      • Trucking & 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 & Motion Picture
      • Magazines
      • Music
      • Publishing & Information Services
      • Radio & Podcast
      • Television
      • View All Entertain­ment & Media

      • Financial Services & Investing

      • Accounting News & Issues
      • Acquisitions, Mergers & 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 & Recapitalisation
      • 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 & 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 & 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 & Defence
      • Agriculture
      • Chemical
      • Construction & Building
      • General Manufacturing
      • HVAC (Heating, Ventilation & Air-Conditioning)
      • Machinery
      • Machine Tools, Metalworking & Metallurgy
      • Mining
      • Mining & Metals
      • Paper, Forest Products & Containers
      • Precious Metals
      • Textiles
      • Tobacco
      • View All Heavy Industry & Manufacturing

      • Telecomm­unications

      • Carriers & 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 & Spirits
      • Beverages
      • Bridal Services
      • Cannabis
      • Cosmetics & Personal Care
      • Fashion
      • Food & Beverages
      • Furniture & Furnishings
      • Home Improvement
      • Household, Consumer & Cosmetics
      • Household Products
      • Jewellery
      • 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 & 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 & Tourist Attractions
      • Gambling & Casinos
      • Hotels & Resorts
      • Leisure & Tourism
      • Outdoors, Camping & Hiking
      • Passenger Aviation
      • Travel Industry
      • View All Travel

  • Policy & Public Interest
      • Policy & Public Interest

      • Animal Welfare
      • Corporate Social Responsibility
      • Economic News, Trends & Analysis
      • Education
      • Environmental
      • European Government
      • Labour & Union
      • Natural Disasters
      • Not For Profit
      • Public Safety
      • 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

  • Overview
  • Distribution
  • Paid Placement
  • Multichannel Amplification
  • Disclosure Services
  • SocialBoost
  • Rooms
    • MediaRoom
    • ESG Rooms
  • AI Tools
  • General Enquiries
  • Media Enquiries
  • Partnerships
  • Hamburger menu
  • Cision PR Newswire UK provides press release distribution, targeting, monitoring, and marketing services
  • Send a Release
    • Phone

    • +44 (0)20 7454 5110 from 8 AM - 5:30 PM GMT

    • ALL CONTACT INFO
    • Contact Us

      +44 (0)20 7454 5110
      from 8 AM - 5:30 PM GMT

  • Client Login
  • Send a Release
  • Resources
  • Blog
  • Journalists
  • News in Focus
    • Browse News Releases
    • Regulatory News
  • 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
    • Policy & Public Interest
  • People & Culture
    • People & Culture
  • Client Login
  • Send a Release
  • Resources
  • Blog
  • Journalists
  • Overview
  • Distribution
  • Paid Placement
  • Multichannel Amplification
  • Disclosure Services
  • Cision Communications Cloud®
  • AI Tools
  • Client Login
  • Send a Release
  • Resources
  • Blog
  • Journalists
  • General Enquiries
  • Media Enquiries
  • Partnerships
  • Client Login
  • Send a Release
  • Resources
  • Blog
  • Journalists

New Study Shows Circulating Tumor Cell Enumeration - as Part of Composite Biomarker Panel - May Serve as a Surrogate for Efficacy Response in Metastatic Castration-Resistant Prostate Cancer


News provided by

Janssen Diagnostics, LLC

28 Sep, 2013, 11:30 GMT

Share this article

Share toX

Share this article

Share toX

-- First study to find patients with unfavorable risk profile at 12 weeks have worse prognosis and should be considered for alternative treatments

RARITAN, New Jersey, Sept. 28, 2013 /PRNewswire/ -- Janssen Diagnostics, LLC announced today results from a study presented at the European Cancer Congress in Amsterdam, Netherlands, that demonstrated circulating tumor cell (CTC) enumeration using CELLSEARCH®, along with lactate dehydrogenase (LDH) as part of a composite biomarker panel, was an efficacy-response surrogate for survival in managing patients with metastatic castration-resistant prostate cancer (mCRPC). The results show mCRPC patients with greater than or equal to five CTCs and an abnormal LDH  level at 12 weeks of treatment have a poorer prognosis than those with lower CTC counts and normal LDH  values, with a one- and two-year survival probability of 25 percent and 2 percent compared to 82 percent and 46 percent, respectively. Findings suggest therapeutic alternatives should be considered for patients in the high-risk category at 12 weeks.

"This study is the first to demonstrate individual patient surrogacy for CTCs and provides a potential post-treatment outcome measure that may assist with managing an individual patient's disease," said lead study investigator Howard Scher, M.D., Genitourinary Oncology Service, Department of Medicine, Memorial Sloan-Kettering Cancer Center. "In cancer treatment it can be difficult to determine when a new therapy is needed for a patient. The ability to determine if a treatment is working for a patient, and switch as needed, could potentially have real clinical utility, especially for advanced disease such as metastatic castration-resistant prostate cancer."

CTC enumeration was included as an outcome measure in the multinational randomized, double-blind, placebo-controlled ZYTIGA® (abiraterone acetate) Phase 3 trial (COU-AA-301) in mCRPC patients previously treated with docetaxel. The primary endpoint was overall survival. The trial was conducted at 147 sites in 13 countries in North America, Europe, and Australia. Patients were randomized to receive ZYTIGA® 1000 mg daily or matched placebo. Both groups received prednisone 10 mg daily. Treatment was continued until disease progression based on PSA determinations, imaging, and/or clinical criteria, or until unacceptable toxicity.

One of the secondary objectives was the examination of CTC enumeration and other biomarkers as a potential surrogate for survival, recognizing that additional studies would be needed to confirm results. CTCs were measured at baseline and four, eight and 12 weeks. A trichotomous surrogate biomarker panel based on 12-week data categorized patients as low-risk (CTC less than or equal to 4), intermediate-risk (CTC greater than or equal to 5, LDH less than or equal to 250 IU/L) or high-risk (CTC greater than or equal to 5, LDH >250 IU/L). Individual level surrogacy, or clinical usefulness for treatment of individual patients, was assessed using Prentice criteria and trial level surrogacy by measuring the association between the treatment effect on the surrogate and survival within each country and randomly generated pseudo sub-studies. The Prentice criteria include the following:  treatment must have a significant effect on the clinical end point, i.e., survival; treatment must have a significant effect on the proposed biomarker; the biomarker must have a significant impact on the clinical end point; and the full effect of treatment on the clinical end point must be captured by the biomarker.

"These data reinforce Janssen's commitment to patients in need, with the goal of helping health care professionals determine the right therapy at the right time," said Robert McCormack, Ph.D., Head of Technology Innovation at Janssen Diagnostics, LLC. "At the individual patient level, these results indicate CTCs may be a useful indicator of therapy effectiveness in men with metastatic castration-resistant prostate cancer.  We are continuing to study CTCs at both the individual patient and larger trial level, and look forward to sharing our findings when the data mature."

Complete biomarker data at 12 weeks were available from 711 of 1195 patients; some study sites/countries were unable to assess CTCs. All Prentice criteria were satisfied at the individual level:  survival differed between the ZYTIGA® and placebo arms (p=0.034); surrogate distribution differed by treatment (p<0.001); the surrogate had strong discriminatory power to distinguish low- and high-risk patients (concordance probability estimate [CPE] = 0.79); and the treatment effect on survival was explained by the surrogate. There was only a weak association between the surrogate and survival at the trial level, potentially related to the small sample sizes of the groups studied.

The CELLSEARCH® system is the only CTC test that has obtained U.S. Food and Drug Administration (FDA) 510(k) clearance for aiding in the monitoring of patients with metastatic breast, colorectal or prostate cancer. In addition to its clearance in the U.S. and approval in China for the monitoring of patients with metastatic breast cancer, CELLSEARCH® fulfills the requirements for CE marking in the European Union (EU). CE marking indicates compliance with EU legislation of a product, wherever in the world manufactured, and enables its free movement within the European market.

About Circulating Tumor Cells
Circulating tumor cells are cancer cells that have detached from the tumor and are found at extremely low levels in the bloodstream. The value of capturing and counting CTCs is evolving as more research data is gathered about the utility of these markers in monitoring disease progression and potentially guiding personalized cancer therapy.

About Janssen Diagnostics
Janssen Diagnostics is the center of excellence in specialized diagnostics development, an important role within the global Janssen pharmaceutical companies. In 1953, founder Dr. Paul Janssen championed an unwavering focus on pharmacological and medical research with a singular objective to improve quality of life by developing medicines that addressed unmet medical needs.

The Janssen Diagnostics team shares that same vision and is dedicated to improving patients' lives, one by one, by making truly personalized care the cornerstone of our healthcare system. Our goal is to influence current thinking beyond drug treatment and develop as a solutions provider. The Janssen legacy of excellence will continue to inspire innovation utilizing real-world data and enable us to reach our goal in developing care solutions that cater to the needs of each individual patient.

Media Inquiries:
Kellie McLaughlin
Phone: 1-908-927-7477

Investor Relations:
Stan Panasewicz
Phone: 1-732-524-2524

Louise Mehrotra
Phone: 1-732-524-6491

Modal title

Contact PR Newswire

  • +44 (0)20 7454 5110
    from 8 AM - 5:30 PM GMT
  • General Enquiries
  • Media Enquiries
  • Partnerships

Products

  • Content Distribution
  • Multimedia Services
  • Disclosure Services
  • Cision Communications Cloud®

About

  • About PR Newswire
  • About Cision
  • Partnering Opportunities
  • Careers
  • Accessibility Statement
  • APAC
  • APAC - Simplified Chinese
  • APAC - Traditional Chinese
  • Brazil
  • Canada
  • Czech
  • Denmark
  • Finland
  • France
  • Germany
  • India
  • Indonesia
  • Israel
  • Japan
  • Korea
  • Mexico
  • Middle East
  • Middle East - Arabic
  • Netherlands
  • Norway
  • Poland
  • Portugal
  • Russia
  • Slovakia
  • Spain
  • Sweden
  • United States
  • Vietnam

My Services

  • All News Releases
  • Customer Portal
  • Resources
  • Blog
  • Journalists
  • Data Privacy

Do not sell or share my personal information:

  • Submit via Privacy@cision.com 
  • Call Privacy toll-free: 877-297-8921

Contact PR Newswire

Products

About

My Services
  • All News Releases
  • Customer Portal
  • Resources
  • Blog
  • Journalists
+44 (0)20 7454 5110
from 8 AM - 5:30 PM GMT
  • Terms of Use
  • Privacy Policy
  • Information Security Policy
  • Site Map
  • RSS
  • Cookie Settings
Copyright © 2025 PR Newswire Europe Limited. All Rights Reserved. A Cision company.