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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
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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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Updated: Apr 28, 2026

Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
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MicroRNAs in osteosarcomagenesis.

Lisa A Kafchinski1, Kevin B Jones

  • 1Department of Orthopaedics and Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA.

Advances in Experimental Medicine and Biology
|June 14, 2014
PubMed
Summary
This summary is machine-generated.

The cause of osteosarcoma (OS) is unknown, prompting research into new molecular drivers. Scientists are investigating novel molecules to understand and potentially treat this aggressive bone cancer.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The origin of osteosarcoma (OS), a prevalent bone cancer, is not well understood.
  • High-frequency clinical and molecular patterns in OS suggest a central, yet undiscovered, causative agent.
  • The aggressive, metastatic, and genetically unstable nature of OS, lacking clear precursor lesions, presents a significant biological puzzle.

Purpose of the Study:

  • To explore the enigmatic etiology of osteosarcoma.
  • To investigate potential central drivers underlying the development of OS.
  • To identify novel molecular targets for understanding and treating osteosarcoma.

Main Methods:

  • Literature review and analysis of existing clinical and molecular data in osteosarcoma.
  • Hypothetical modeling of OS pathogenesis based on observed patterns.
  • Exploration of the role of newly discovered molecules in cellular biology relevant to OS.

Main Results:

  • The study highlights the lack of understanding regarding osteosarcoma's origins.
  • It emphasizes the need for identifying a central driver for this aggressive malignancy.
  • The research framework positions the discovery of new molecules as crucial for unlocking OS biology.

Conclusions:

  • Osteosarcoma's etiology remains a significant enigma in oncology.
  • Identifying a central driver is critical for understanding OS development.
  • Further research into novel molecules holds promise for unraveling the complexities of osteosarcoma.