Tandem affinity depletion: a combination of affinity fractionation and immunoaffinity depletion allows the detection of low-abundance components in the complex proteomes of body fluids.
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Tandem affinity depletion: a combination of affinity fractionation and immunoaffinity depletion allows the detection of low-abundance components in the complex proteomes of body fluids. / Mortezai, Naghmeh; Harder, Sönke; Schnabel, Claudia; Moors, Eva; Gauly, Matthias; Schlüter, Hartmut; Wagener, Christoph; Buck, Friedrich.
In: J PROTEOME RES, Vol. 9, No. 12, 12, 03.12.2010, p. 6126-6134.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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T1 - Tandem affinity depletion: a combination of affinity fractionation and immunoaffinity depletion allows the detection of low-abundance components in the complex proteomes of body fluids.
AU - Mortezai, Naghmeh
AU - Harder, Sönke
AU - Schnabel, Claudia
AU - Moors, Eva
AU - Gauly, Matthias
AU - Schlüter, Hartmut
AU - Wagener, Christoph
AU - Buck, Friedrich
PY - 2010/12/3
Y1 - 2010/12/3
N2 - Protein biomarker discovery in the low concentration range of human body fluids requires the enrichment of the proteins of interest. Here we report on a tandem affinity strategy: In the first step, we isolated a human plasma glyco-subproteome of healthy individuals by wheat germ agglutinin (WGA) lectin affinity chromatography. In the second step, the proteins of this subproteome were used to raise antibodies in llama (Lama glama). The heavy-chain fraction of the llama antibodies was used to deplete from the WGA lectin binding fraction all proteins normally found in human plasma. In this way, we selectively enriched the glycoprotein, CEA, a known cancer marker which had been spiked into normal plasma. As a proof of concept, we applied this method to the analysis of plasma sample from colon cancer patients. We could demonstrate the selective enrichment of CEA by a factor of 600-800.
AB - Protein biomarker discovery in the low concentration range of human body fluids requires the enrichment of the proteins of interest. Here we report on a tandem affinity strategy: In the first step, we isolated a human plasma glyco-subproteome of healthy individuals by wheat germ agglutinin (WGA) lectin affinity chromatography. In the second step, the proteins of this subproteome were used to raise antibodies in llama (Lama glama). The heavy-chain fraction of the llama antibodies was used to deplete from the WGA lectin binding fraction all proteins normally found in human plasma. In this way, we selectively enriched the glycoprotein, CEA, a known cancer marker which had been spiked into normal plasma. As a proof of concept, we applied this method to the analysis of plasma sample from colon cancer patients. We could demonstrate the selective enrichment of CEA by a factor of 600-800.
KW - Animals
KW - Antibody Affinity
KW - Biomarkers
KW - Blotting, Western
KW - Camelids, New World
KW - Carcinoembryonic Antigen
KW - Chromatography, Affinity
KW - Chromatography, High Pressure Liquid
KW - Colonic Neoplasms
KW - Humans
KW - Mass Spectrometry
KW - Proteome
KW - Proteomics
KW - Reproducibility of Results
KW - Wheat Germ Agglutinins
KW - Journal Article
U2 - 10.1021/pr100224y
DO - 10.1021/pr100224y
M3 - SCORING: Journal article
C2 - 20839810
VL - 9
SP - 6126
EP - 6134
JO - J PROTEOME RES
JF - J PROTEOME RES
SN - 1535-3893
IS - 12
M1 - 12
ER -