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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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...
MicroRNAs01:22

MicroRNAs

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 ends...
MicroRNAs01:22

MicroRNAs

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 ends...
Neurulation01:30

Neurulation

Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the anterior...

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MicroRNAs in brain development and degeneration.

Ana-Maria Enciu1, Bogdan Ovidiu Popescu, Ancuta Gheorghisan-Galateanu

  • 1Department of Cellular and Molecular Medicine, School of Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroilor Sanitari, Sector 5, 050474 Bucharest, Romania. ana.enciu@gmail.com

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MicroRNAs regulate protein synthesis and are vital in development and disease. Brain-specific microRNAs are increasingly linked to neurodegenerative disorders like Alzheimer's disease.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Neuroscience

Background:

  • MicroRNAs (miRNAs) are short, non-coding RNAs regulating gene expression post-transcriptionally.
  • miRNAs play critical roles in embryonic development, adult physiology, and various pathologies, including cancer and myocardial infarction.
  • Specific miRNAs are expressed in the brain with temporal and neuronal population selectivity, influencing cellular differentiation and development.

Purpose of the Study:

  • To review the recent advancements in microRNA research, particularly focusing on brain-specific miRNAs.
  • To highlight the association of these brain-restricted miRNAs with neurodegenerative diseases.
  • To integrate new findings into the broader context of cellular biology.

Main Methods:

  • Literature review of recent studies on microRNAs and neurodegeneration.
  • Analysis of expression patterns and functional roles of brain-specific miRNAs.
  • Synthesis of current knowledge on miRNA involvement in neurological disorders.

Main Results:

  • MicroRNAs are key regulators of posttranscriptional gene silencing.
  • Brain-specific miRNAs exhibit dynamic expression patterns and are crucial for neuronal development.
  • Emerging evidence links specific brain-restricted miRNAs to Alzheimer's disease, Parkinson's disease, and Huntington's disease.

Conclusions:

  • MicroRNAs are significant players in both normal and pathological processes in the brain.
  • Further research into brain-specific miRNAs offers potential insights into neurodegenerative disease mechanisms.
  • Integrating microRNA research into cellular biology is essential for understanding complex biological systems.