Life Sciences

Cancer Research

Neil Hayes, MD, MPH. Image: UNC

Molecular Subtypes and Genetic Alterations May Determine Response to Lung Cancer Therapy

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Chapel Hill, NC (Scicasts) – Cancer therapies targeting specific molecular subtypes of the disease allow physicians to tailor treatment to a patient’s individual molecular profile. But scientists are finding that in many types of cancer the molecular subtypes are more varied than previously thought and contain further genetic alterations that can affect a patient’s response to therapy.

Discovery in Cell Signalling Could Help Fight Against Melanoma

Discovery in Cell Signalling Could Help Fight Against Melanoma

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Houston, TX (Scicasts) – The human body does a great job of generating new cells to replace dead ones but it is not perfect. Cells need to communicate with or signal to each other to decide when to generate new cells. Communication or signaling errors in cells lead to uncontrolled cell growth and are the basis of many cancers.

PREX2 is a newly discovered gene that is recurrently mutated in melanoma. Image: courtesy of Alexei Protopopov

Recurrent Genetic Mutations in Melanoma

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Cambridge, MA (Scicasts) – Melanoma – the deadliest and most aggressive form of skin cancer – has long been linked to time spent in the sun. Now a team led by scientists from the Broad Institute and Dana-Farber Cancer Institute has sequenced the whole genomes of 25 metastatic melanoma tumours, confirming the role of chronic sun exposure and revealing new genetic changes important in tumour formation.

Scientists Identify Prostate Cancer Stem Cells Among Low-PSA Cells

Scientists Identify Prostate Cancer Stem Cells Among Low-PSA Cells

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Houston, TX (Scicasts) – According to a report by scientists at The University of Texas MD Anderson Cancer Center, prostate cancer cells that defy treatment and display heightened tumour-generating capacity can be identified by levels of prostate specific antigen (PSA) expressed in the tumour cells.

This image shows the formation of PDE4 in oxygen-deficient lung tumor cells. Lung cells produce PDE4 (stained green: left) even if their oxygen content is normal. More PDE4 is produced (right) if they are oxygen-deficient (hypoxia). The cell nuclei are stained blue.  Image: MPI for Heart and Lung Research

Scientists Aim to Kill Lung Tumours

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München, Germany (Scicasts) – Lung cancer is the leading cause of cancer death throughout the world. Standard treatment methods do not usually result in long-term recovery. In addition to the proliferation of the tumour cells, the growth of blood vessels controls tumours development. The blood vessel growth is controlled by several signalling molecules.

This is a confocal microscope image of a spontaneous breast cancer tumour in a mouse.  Image: UCSF

New Imaging Technique Shows Why Immune System Fails to Kill Tumours in Mice

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San Francisco, CA (Scicasts) – A pioneering approach to imaging breast cancer in mice has revealed new clues about why the human immune system often fails to attack tumours and keep cancer in check. This observation, by scientists at the University of California, San Francisco (UCSF), may help to reveal new approaches to cancer immunotherapy.

The Petersen-Bissell collaboration used milk mucin (MM) to mark luminal-like and CD271 to mark basal-like cancer cells in primary tumors and tumor cell lines. The MM stain is red, the CD271 stain is green, and nuclei are stained blue. Inset in A shows staining of normal breast tissue for comparison.  Image: Bissell-Petersen collaboration

New Findings Contradict Current Views on Cancer Stem Cells

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Berkeley, CA (Scicasts) – New findings in breast cancer research by an international team of scientists contradict the prevailing belief that only basal-like cells with stem cell qualities can form invasive tumours. Research led by Ole William Petersen at the University of Copenhagen (CU) and Mina Bissell of the Lawrence Berkeley National Laboratory (Berkeley Lab) and has shown that luminal-like cells with no detectable stem cell qualities can generate larger tumours than their basal-like counterparts.

Professor Carlos Caldas, senior group leader at Cancer Research UK, demonstrating the classification of breast cancer into at least 10 subtypes grouped by common genetic features that correlate with survival.

Breast Cancer Reclassified into 10 Different Diseases

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London, UK (Scicasts) – A major study carried out by Cancer Research UK scientists could revolutionize the way women with breast cancer will be diagnosed and treated in the future, by reclassifying the disease into 10 completely new categories based on the genetic fingerprint of a tumour. [Video]

The legendary Trojan horse was a way for the Greeks to bypass Troy's defenses.  Researchers at Emory are testing a strategy where cancer cells are induced to shut down their DNA repair genes, making them defenseless against radiation. Image: Emory University

New Technique to Remove Cancer Cells' Defences Against Radiation

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Atlanta, GA (Scicasts) - Researchers at Winship Cancer Institute are developing a technique to remove cancer cells' defences against radiation.

Radiation primarily kills cells by inducing DNA damage, so the aim of the technique is to sensitize cells to radiation by disabling their ability to repair DNA. The technique sneaks RNA molecules into cells that shut down genes needed for DNA repair.