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Related Concept Videos

Translation01:31

Translation

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Translation01:31

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Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Ribosome Profiling02:24

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Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
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Transcriptomic approach to Lesch-Nyhan disease.

Luce Dauphinot1, Lionel Mockel, Julie Cahu

  • 1a CRICM, UPMC Hôpital de la Pitié-Salpêtrière , Paris , France.

Nucleosides, Nucleotides & Nucleic Acids
|June 19, 2014
PubMed
Summary

Lesch-Nyhan disease (LND) involves mutations in the HPRT1 gene, causing uric acid overproduction and neurological issues. Transcriptome analysis revealed 25 dysregulated genes in LND cells, offering new insights into disease pathogenesis.

Keywords:
HPRTLesch-Nyhan diseasehypoxanthine phosphoribosyltransferasemicroarray, gene ontologytranscriptome

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Area of Science:

  • Genetics
  • Molecular Biology
  • Metabolic Disorders

Background:

  • Lesch-Nyhan disease (LND) is an X-linked metabolic disorder stemming from HPRT1 gene mutations.
  • It leads to uric acid overproduction and severe neurological and behavioral symptoms, including self-injury.
  • Understanding LND pathogenesis requires detailed molecular analysis.

Purpose of the Study:

  • To compare the transcriptome of human LND fibroblasts with normal fibroblasts.
  • To identify specific gene expression differences associated with LND.
  • To gain insights into the molecular mechanisms underlying LND pathogenesis.

Main Methods:

  • Utilized a microarray with 60,000 probes to analyze the entire human genome transcriptome.
  • Compared gene expression profiles between LND and control human fibroblast cell lines.
  • Confirmed dysregulated genes using quantitative reverse transcription PCR (RT-PCR).
  • Applied Gene Ontology (GO) analysis for bioinformatic interpretation of microarray data.

Main Results:

  • Identified 25 transcripts with significantly different expression levels between LND and control cells.
  • Confirmed gene dysregulation in LND fibroblasts via RT-PCR.
  • Bioinformatic analysis highlighted affected biological processes, including cell cycle, cell division, and nucleic acid metabolism.
  • Demonstrated specific molecular changes contributing to LND.

Conclusions:

  • Transcriptome analysis reveals specific gene expression alterations in Lesch-Nyhan disease.
  • Dysregulated genes involved in cell cycle and metabolic processes provide new insights into LND pathogenesis.
  • These findings contribute to a deeper understanding of LND molecular mechanisms.