Converting Breast Cancer Cells into Fat, Painkillers Role in Cancer Survival, and More…

Below are highlights of recently published cancer research publicized in the news:

  • Scientists from the University of Basel, Switzerland, used new combination therapy with MEK inhibitors and the anti-diabetic drug Rosiglitazone in mouse models of breast cancer. The therapy inhibits cancer cell invasion, dissemination, and metastasis formation in mouse models of breast cancer forcing the trans-differentiation of breast cancer cells into adipocytes, or fat cells. For more, see study published in Cancer Research.
  • U.S. researchers found that regular use (6 months or more) of NSAID, or painkiller medications such as aspirin, was consistent with prolonged disease-specific survival and overall survival in head and neck cancer compared with nonregular NSAID use. The findings were reported in Journal of Experimental Medicine.
  • Researchers at the University of Pennsylvania and Drexel University found a way to stimulate macrophages ability to engulf and eat cancer cells by overcoming hindrances caused by inhibitory activity of CD47 protein. CD47 is a ‘don’t-eat-me’ signal that suppresses the phagocytic activity of macrophages. Read more about this in Nature Immunology.
  • An international group of authors established molecular hallmarks of tumor hypoxia across multiple cancer types. Hypoxia is an adverse prognostic feature correlated with tumor aggressiveness. The group quantified hypoxia in 8,006 tumors across 19 tumor types. Established patterns may offer insights into what categories of patients may benefit most from anti-hypoxia therapy and provide the basis for developing therapeutic agents targeting tumor hypoxia. The study was published in Nature Genetics.

Using Cerebrospinal Fluid to Profile Gliomas

Researchers from MSK have studied the use of cerebrospinal fluid (CSF) to determine the genetic profiles of gliomas (brain tumors). This could replace brain biopsies with minimally invasive lumbar punctures. MSK’s Dr. Ingo Mellinghoff led the study, published in Nature and reported by Forbes.

Researchers found tumor-derived DNA in 42 CSF samples from the 85 adult patients diagnosed with gliomas included in the study. The use of CSF to sequence tumor DNA may someday determine treatment options for patients for whom a brain biopsy is not an option and could help track changes to tumor profiles over time. Further research will need to determine when tumor DNA becomes discoverable in CSF.

Does the Medium Change the Message?

A recent article by Ed Yong in The Atlantic describes how the basics of cancer research may have inadvertently altered results for decades.

Scientists use a growth medium to study human or animal cancer cells in the lab. This medium is most commonly Eagle’s minimal essential medium (EMEM), developed in 1959. EMEM offers cells only the basic nutrients needed for growth. But more recently, researchers have developed new mediums that include many more of the chemicals and nutrients found in blood. And researchers are finding that the medium selected for a study can impact the results.

In the article, MSK’s Dr. Natasha Pavlova says that while the new mediums would help scientists looking at how cancer cells consume nutrients, they are not exact substitutes for blood cells, tissues, and organs. The cancer cells used by researchers, often of a similar age to EMEM, may also impact results. It’s not yet known if they would respond to new mediums more or less like cancer cells behave in a body.