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mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
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mTOR Signaling and Cancer Progression03:03

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Cancer-Critical Genes I: Proto-oncogenes01:33

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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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Cancer-Critical Genes I: Proto-oncogenes01:33

Cancer-Critical Genes I: Proto-oncogenes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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Generation of Tumor Organoids from Genetically Engineered Mouse Models of Prostate Cancer
08:54

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Published on: June 13, 2019

Conserved gene expression programs integrate mammalian prostate development and tumorigenesis.

Colin Pritchard1, Brig Mecham, Ruth Dumpit

  • 1Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA.

Cancer Research
|February 19, 2009
PubMed
Summary

Normal prostate development shares molecular pathways with prostate cancer. Key developmental gene expression programs, particularly during branching morphogenesis, are reactivated in prostate tumors, offering new insights into cancer phenotypes.

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Published on: September 8, 2015

Area of Science:

  • Developmental Biology
  • Cancer Biology
  • Molecular Oncology

Background:

  • Embryogenesis and carcinogenesis share signaling pathways.
  • Prostate development involves epithelium-stroma interactions.
  • Understanding normal development aids cancer research.

Purpose of the Study:

  • To determine molecular links between prostate development and carcinogenesis.
  • To characterize gene expression during murine prostate organogenesis.
  • To compare developmental gene expression with prostate cancer profiles.

Main Methods:

  • Gene expression profiling of murine prostate development stages (induction, branching morphogenesis, secretory differentiation).
  • Comparative analysis of gene expression in Pten and Myc-driven murine prostate cancers.
  • Validation of key developmental genes in human prostate cancer tissues.

Main Results:

  • A reproducible temporal gene expression program was identified during prostate organogenesis.
  • The gene expression profile of branching morphogenesis was significantly associated with both prostate cancer models.
  • Genes from the branching morphogenesis program (e.g., PRDX4, SLC43A1, DNMT3A) were altered in human prostate cancer.

Conclusions:

  • Normal prostate developmental processes are active in prostate neoplasia.
  • Developmental gene expression programs provide insights into prostate cancer phenotypes.
  • Exploiting organogenesis features can enhance understanding of cancer biology.