Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Cyclacel’s biomarker technology shows that CYC202 induces cancer cells to commit suicide

15.07.2003


Over half of solid tumour patients analysed tested positive for cancer cell death

Cyclacel Limited, the UK-based biopharmaceutical company, reported today that it demonstrated through state-of-the-art biomarker technology that CYC202 (R-roscovitine), its lead CDK inhibitor drug candidate, appears to induce cancer cell suicide or apoptosis in patients receiving the drug. Details of the biomarker data obtained with CYC202 were reported today at an oral presentation at the American Association for Cancer Research (AACR) annual meeting taking place here.

Biomarker technology is used to understand the molecular mechanism of action of novel drugs in humans, provide insights into their pharmacological properties, measure their biological effect (e.g. induce cancer cells to commit suicide) and determine susceptibility or resistance to the treatment. In the long-term biomarker analysis of tumour blood and tissues may allow selective treatment with CYC202 of those patients identified as likely to benefit from the drug based on the specific genetic profile of their tumour.



Biomarker analysis of blood samples from patients with cancer treated with CYC202 demonstrated that 54% (14 of 26 analysed) tested positive for cancer cell death or apoptosis following single agent treatment with the drug. In addition, seven CYC202 Phase I patients with various tumours, including pancreas and lung cancer, experienced long lasting tumour stabilisation. These patients received CYC202 capsules taken by mouth after exhausting other treatment options. CYC202 is presently being tested in two international, multicentre Phase IIa clinical trials for the treatment of breast and lung cancer in combination with standard chemotherapy.

Cyclacel’s Biomarker Team used a novel assay technique to calculate the extent by which cancer cells are committing suicide (or apoptotic index) in different patients on the drug. An advantage of this test is that it measures cellular material released into the circulation by dying or dead cancer cells as a result of apoptosis. In this manner small blood samples can be readily obtained from patients with solid tumours rather than tissue pathology samples obtained through biopsies. Another approach taken by Cyclacel’s Biomarker Team is the study of plasma proteomic profiles allowing the precise comparison of the proteins present in a patient’s plasma before and after treatment with CYC202. Using this approach markers were detected that are only present in plasma following CYC202 treatment.

Phase I trials are not designed to detect efficacy of experimental drugs. Patients enrolled in Phase I studies suffer from many different types of cancer, have typically exhausted other therapeutic alternatives and usually experience low survival. In order to assess their prognosis it is necessary to wait for approximately six months post treatment to determine whether their cancer has continued to grow. The seven patients in the CYC202 Phase I study reported with stable disease included patients with adenocarcinoma, adrenal, lung, ovarian, pancreatic, parotid gland and thymus cancers. All seven showed long Times-To-Progression (“TTP”) of their cancer, ranging between 7 and more than 11 months, and have been on drug for several months, ranging between 6 and more than 15 cycles each involving 3 weeks of treatment.

Dr Athos Gianella-Borradori, Cyclacel’s Medical Director commented, “It is encouraging to see validation of the presumed mechanism by which CYC202 is causing the death of cancer cells through biomarker technology. It is also encouraging to see Phase I patients with poor prognosis experience long periods of stable disease after single therapy with CYC202. One should nevertheless be cautious about not over interpreting early indications of effectiveness from unscheduled efficacy assessments. Now that we have established a baseline for quantifying apoptosis in patients undergoing CYC202 monotherapy, we can use such biomarker techniques to assess the effects of the drug on patients receiving CYC202 in combination with chemotherapy.”

“The results presented at AACR confirm Cyclacel’s technological leadership in the emerging field of biomarkers,” said Spiro Rombotis, CEO. “This is a strategic technology facilitating more efficient investments in drug development programmes. Biomarkers help determine clinical go/no go decisions very early in clinical development and are also proving invaluable in demonstrating early proof of concept in humans. We believe that biomarkers will be a source of competitive advantage in pivotal trials and market positioning by helping identify responder patients based on their genetic profile. We are excited about the work of our talented Biomarker Team and our goal of converting our understanding of biological pathways into patient treatment guidelines. We expect to use our Biomarker technology in additional drug programmes as they progress into clinical trials.”

About Cyclacel

Cyclacel is a biopharmaceutical company that designs and develops small molecule drugs that act on key cell cycle regulators to stop uncontrolled cell division in cancer and other diseases involving abnormal cell proliferation. The Company’s discovery engines integrate cell cycle biology expertise with a large library of gene-based targets, state-of-the-art RNAi functional genomics, chemogenomics and clinical biomarker technologies to rapidly deliver new drugs. Cyclacel has six research and development programs underway. Most advanced is CYC202, a Cyclin Dependent Kinase (CDK) inhibitor, in Phase II trials for breast and lung cancer. CYC202 has also completed a Phase I trial in healthy volunteers and is being explored for use in glomerulonephritis, a disease of renal cell proliferation. Cyclacel has entered into corporate alliances with AstraZeneca, CV Therapeutics and a top 5 pharmaceutical major all in the oncology field.


Robert Gottlieb | Feinstein Kean Healthcare
Further information:
http://www.cyclacel.com/company_profile/press2003/2003_7_14.htm
http://www.fkhealth.com/

More articles from Health and Medicine:

nachricht 'Icebreaker' protein opens genome for t cell development, Penn researchers find
21.02.2018 | University of Pennsylvania School of Medicine

nachricht Similarities found in cancer initiation in kidney, liver, stomach, pancreas
21.02.2018 | Washington University School of Medicine

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Researchers invent tiny, light-powered wires to modulate brain's electrical signals

21.02.2018 | Life Sciences

The “Holy Grail” of peptide chemistry: Making peptide active agents available orally

21.02.2018 | Life Sciences

Atomic structure of ultrasound material not what anyone expected

21.02.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>