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Related Concept Videos

Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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General Transcription Factors01:30

General Transcription Factors

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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Author Spotlight: Standardizing Tissue Sampling in Proteomics and Immunochemistry Research
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Author Spotlight: Standardizing Tissue Sampling in Proteomics and Immunochemistry Research

Published on: February 16, 2024

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The variability in tissue proteomics.

Visith Thongboonkerd1

  • 1Medical Proteomics Unit, Office for Research and Development, Faculty of Medicine Siriraj Hospital, and Center for Research in Complex Systems Science, Mahidol University, Bangkok, Thailand. thongboonkerd@dr.com

Proteomics. Clinical Applications
|August 29, 2012
PubMed
Summary
This summary is machine-generated.

Blood contamination significantly impacts kidney tissue proteome analysis. Careful sample preparation, including washing, is crucial for accurate clinical proteomics results.

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Area of Science:

  • Clinical proteomics
  • Renal tissue analysis
  • Biomarker discovery

Background:

  • Proteomic analysis of kidney tissue is vital for understanding disease mechanisms.
  • Variability in sample preparation can significantly affect proteomic study outcomes.
  • Identifying and mitigating sources of variability is essential for reliable clinical proteomics.

Purpose of the Study:

  • To investigate the impact of blood contamination on the human glomerular proteome.
  • To evaluate the effect of varying washing steps on protein identification in laser microdissected kidney tissue.
  • To provide recommendations for optimizing sample preservation and preparation in tissue proteome analysis.

Main Methods:

  • Laser microdissection for isolating glomerular tissue from kidney biopsies.
  • Proteomic analysis using mass spectrometry to identify proteins.
  • Systematic variation of washing steps (1-5 washes with PBS) to assess their impact on protein recovery and purity.

Main Results:

  • Blood-derived proteins constituted nearly 50% of identified proteins in unwashed samples.
  • Varying the number of washes (1-5) resulted in only 43-80% of proteins being common across all samples.
  • The number of washes significantly influenced the reproducibility and identification of the glomerular proteome.

Conclusions:

  • Blood contamination is a major source of variability in kidney tissue proteomics.
  • Optimizing washing protocols is critical for reducing blood protein interference and improving the accuracy of glomerular proteome analysis.
  • Standardized sample preservation and preparation methods are essential for reliable clinical proteomics research.