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MicroRNAs01:22

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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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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
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Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
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MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
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MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method

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MicroRNAs in metabolism.

S Vienberg1, J Geiger2, S Madsen1

  • 1Center for Basic Metabolic Research, Faculty of Health, University of Copenhagen, Copenhagen, Denmark.

Acta Physiologica (Oxford, England)
|March 25, 2016
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRNAs) regulate metabolic balance in key tissues like the liver and pancreas. Their dysregulation links to metabolic diseases, highlighting their therapeutic potential.

Keywords:
adipocytesmetabolismmicroRNAnon-alcoholic hepato-steatosistype 2 diabetes mellitusβ-cells

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Endocrinology

Background:

  • MicroRNAs (miRNAs) are key regulators of metabolic homeostasis.
  • Major metabolic tissues, including pancreatic beta-cells, liver, muscle, and adipose tissue, are influenced by miRNAs.
  • miRNAs play roles in differentiation, proliferation, and insulin exocytosis in beta-cells.

Purpose of the Study:

  • To review the role of miRNAs in metabolic regulation.
  • To discuss the involvement of specific miRNAs in lipid metabolism, insulin sensitivity, and adipocyte differentiation.
  • To highlight the significance of circulating miRNAs as signaling molecules and disease markers.

Main Methods:

  • Literature review of current research on miRNAs in metabolism.
  • Analysis of studies investigating miRNA function in various metabolic tissues.
  • Examination of the role of miRNAs in metabolic diseases such as obesity and type 2 diabetes.

Main Results:

  • Specific miRNAs (e.g., miR-200, miR-29, miR-7, miR-375, miR-335) are crucial for pancreatic beta-cell function.
  • MiR-33a/b impact cholesterol and lipid metabolism, while miR-103/107 affect hepatic insulin sensitivity.
  • Muscle and adipose tissue differentiation and conversion are regulated by specific miRNAs (e.g., miR-1, miR-133, miR-206, miR-365, miR-455).

Conclusions:

  • miRNAs are critical regulators of metabolic homeostasis across multiple tissues.
  • Circulating miRNAs in exosomes have potential as endocrine signals and disease biomarkers.
  • Dysregulated miRNAs in metabolic diseases present therapeutic targets.