Deciphering mechanisms of response and resistance in large-scale mouse cancer screens

Anirudh Prahallad1, Michael Rugaard Jensen1, Emilie Anne Chapeau1

  • 1Oncology Disease Area, Novartis Institutes for BioMedical Research, Basel, Switzerland.

Insights

Acquired resistance limits cancer treatment success. This review explores how large-scale screens in preclinical models identify mechanisms of drug resistance and guide combination therapies for better patient outcomes.

Area of Science:

  • Oncology
  • Cancer Research
  • Pharmacology

Background:

  • Acquired resistance to cancer therapeutics is a significant clinical challenge.
  • Tumor genetic alterations and microenvironment modulation contribute to treatment failure.
  • Understanding resistance mechanisms is crucial for developing durable cancer treatments.

Purpose of the Study:

  • To review large-scale in vivo screening strategies for elucidating acquired drug resistance.
  • To identify novel combination therapies based on resistance mechanisms.
  • To inform the design of clinical trials for improved cancer treatment.

Main Methods:

  • Review of large-scale in vivo screens in preclinical cancer models.
  • Analysis of genetic and pharmacological agents used in resistance studies.
  • Evaluation of identified resistance mechanisms and potential combination strategies.

Main Results:

  • In vivo screens effectively identify key drivers of acquired drug resistance.
  • Understanding tumor environment modulation aids in predicting resistance.
  • Data from preclinical models can guide the selection of effective combination therapies.

Conclusions:

  • Large-scale in vivo screens are powerful tools for dissecting cancer drug resistance.
  • Elucidating resistance mechanisms is essential for developing next-generation cancer therapies.
  • Findings support the clinical testing of novel combination strategies for durable cancer treatment.

Related Concept Videos

Treatment Resistant Cancers02:56

Treatment Resistant Cancers

Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.7K
Adaptive Mechanisms in Cancer Cells02:53

Adaptive Mechanisms in Cancer Cells

Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
7.0K
Mechanisms of Retrovirus-induced Cancers01:51

Mechanisms of Retrovirus-induced Cancers

Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
6.9K
Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
3.4K
pH Scale02:41

pH Scale

Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
79.2K
Resistivity01:22

Resistivity

When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
4.4K