Because of their similarity to patient tumors, these models are an exceptional tool for testing the efficacy of new drugs, adapting treatments to tumor characteristics, unraveling resistance to certain treatments, and as a result limiting the need for clinical trials in patients. Institut Curie and Inserm medical oncologists, surgeons, pathologists and biologists collaborated on this work on mouse models which can now be extended to other types of cancers. The 25 breast tumor models are described in a study published in the 1 July 2007 issue of Clinical Cancer Research.
To help clinicians in their search for more effective treatments, Marie-France Poupon and her team in Institut Curie Inserm Unit 612 “Genotoxicology, signaling and experimental radiotherapy” have developed the largest ever series of human breasts cancers grafted into mice. This six-year study would not have been successful without close collaboration between Institut Curie and Inserm medical oncologists, surgeons, pathologists, and biologists.
These breast cancer xenografts in mice reproduce the genetic, genomic, and histological characteristics of the patient-derived tumor tissues. So they recapitulate features of the original tumors, such as overexpression of HER2 receptors, absence or presence of estrogen receptors, mutation of P53, and react identically to chemotherapy.
Twenty-five models of breast tumors in mice of different biological profiles have been established. These models are an excellent preclinical research tool and can be used to test the efficacy of new drugs and novel therapeutic combinations, as well as analyze the response to treatment and adapt it to the tumor characteristics. This will help in the design of clinical trials and hasten the development of new treatments.
This work is continuing within the framework of the creation of a Preclinical Investigation Laboratory in the Translational Research Department at the Institut Curie, with a view to extending this series of tumor models to other types of cancers, such as pediatric cancers, melanoma, lung cancer, ovarian cancer, and cancers of the bronchi, prostate, and colon.
Breast cancer is the most frequent cancer in women and affects one in ten women in the developed world. Every year in France there are 42 000 new cases. Between 1980 and 2000, the number of cases increased by almost 60%, largely as a result of increasingly efficient detection and because people are living longer. Breast cancer is most commonly detected in women aged between 50 and 69 years of age (half of all cases), but can occur at any age, albeit very rarely before the age of 25.
Mortality has declined because of earlier detection and improved treatments combining surgery, radiotherapy, and chemotherapy, depending on the tumor characteristics. When the diagnosis is made early enough, conservative surgery is possible: the tumor is removed and the breast conserved. When the tumor is larger, or is accompanied by extensive precancerous lesions, it is sometimes essential to remove the breast (mastectomy).
A Map of the Cell’s Power Station
18.08.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau
On the way to developing a new active ingredient against chronic infections
18.08.2017 | Deutsches Zentrum für Infektionsforschung
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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