摘要:
Methods are provided for quantifying the Androgen receptor protein (AR) protein directly in biological samples that have been fixed in formalin, using Selected Reaction Monitoring (SRM)/Multiple Reaction Monitoring (MRM) mass spectrometry. The biological samples are chemically preserved and fixed and can be, for example, tissues treated with formaldehyde containing agents/fixatives including formalin-fixed tissue/cells, formalin-fixed/paraffin embedded (FFPE) tissue/cells, FFPE tissue blocks and cells from those blocks. A protein sample is prepared from said biological sample using, for example, the Liquid Tissue protocol and the AR protein is quantitated in the Liquid Tissue sample by the method of SRM/MRM mass spectrometry by quantitating in the protein sample at least one or more of the peptides described.
摘要:
Peptides from the tyrosine-protein kinase receptor UFO protein (AXL) are provided that are particularly advantageous for quantifying the AXL protein directly in biological samples that have been fixed in formalin by the method of Selected Reaction Monitoring (SRM)/Multiple Reaction Monitoring (MRM) mass spectrometry. Such biological samples are chemically preserved and fixed and include formalin-fixed tissue/cells, formalin-fixed/paraffin embedded (FFPE) tissue/cells, FFPE tissue blocks and cells from those blocks. A protein digest is prepared from the biological sample and the AXL protein is quantitated in the Liquid Tissue sample by the method of SRM/MRM mass spectrometry by quantitating in the protein sample at least one or more of the peptides described.
摘要:
Improved methods are provided for treating cancer patients, particularly patients suffering from lung cancer. Methods are provided for identifying whether a lung tumor will be responsive to treatment with a therapeutic regimen that includes pemetrexed and optionally includes cisplatin. A specific FR-α fragment peptide and a specific GART fragment peptide are precisely detected and quantitated by SRM-mass spectrometry directly in lung tumor cells collected from lung tumor tissue that was obtained from a cancer patient and compared to reference levels in order to determine if the lung cancer patient will positively respond to treatment with the c therapeutic regimen.
摘要:
The current disclosure provides for specific peptides, and derived ionization characteristics of the peptides, from the PD-L1 protein that are particularly advantageous for quantifying the PD-L1 protein directly in biological samples that have been fixed in formalin by the method of Selected Reaction Monitoring (SRM) mass spectrometry, or what can also be termed as Multiple Reaction Monitoring (MRM) mass spectrometry. Such biological samples are chemically preserved and fixed wherein said biological sample is selected from tissues and cells treated with formaldehyde containing agents/fixatives including formalin-fixed tissue/cells, formalin-fixed/paraffin embedded (FFPE) tissue/cells, FFPE tissue blocks and cells from those blocks, and tissue culture cells that have been formalin fixed and/or paraffin embedded. PD-L1 peptides having modified or unmodified residues can be quantitated. An example of a modification of a PD-L1 fragment peptide is a phosphorylated tyrosine, threonine, serine, and/or other amino acid residues within the peptide sequence.
摘要:
The current disclosure provides for specific peptides, and derived ionization characteristics of the peptides, from the KRT5, KRT7, NapsinA, TTF1, TP63, and/or MUC1 proteins that are particularly advantageous for quantifying the KRT5, KRT7, NapsinA, TTF1, TP63, and/or MUC1 proteins directly in biological samples that have been fixed in formalin by the method of Selected Reaction Monitoring (SRM) mass spectrometry, or what can also be termed as Multiple Reaction Monitoring (MRM) mass spectrometry. Such biological samples are chemically preserved and fixed wherein said biological sample is selected from tissues and cells treated with formaldehyde containing agents/fixatives including formalin-fixed tissue/cells, formalin-fixed/paraffin embedded (FFPE) tissue/cells, FFPE tissue blocks and cells from those blocks, and tissue culture cells that have been formalin fixed and or paraffin embedded. A protein sample is prepared from said biological sample using the Liquid Tissue™ reagents and protocol and the KRT5, KRT7, NapsinA, TTF1, TP63, and/or MUC1 proteins are quantitated in the Liquid Tissue™ sample by the method of SRM/MRM mass spectrometry by quantitating in the protein sample at least one or more of the peptides described. These peptides can be quantitated if they reside in a modified or an unmodified form. An example of a modified form of a KRT5, KRT7, NapsinA, TTF1, TP63, and MUC1 fragment peptide is phosphorylation of a tyrosine, threonine, serine, and/or other amino acid residues within the peptide sequence.
摘要:
Specific peptides, and derived ionization characteristics of the peptides, from the Fatty acid synthase (FASN) protein are provided that are particularly advantageous for quantifying the FASN protein directly in biological samples that have been fixed in formalin by the method of Selected Reaction Monitoring (SRM) mass spectrometry, or what can also be termed as Multiple Reaction Monitoring (MRM) mass spectrometry. Such biological samples are chemically preserved and fixed and are selected from tissues and cells treated with formaldehyde containing agents/fixatives including formalin-fixed tissue/cells, formalin-fixed/paraffin embedded (FFPE) tissue/cells, FFPE tissue blocks and cells from those blocks, and tissue culture cells that have been formalin fixed and or paraffin embedded. A protein sample is prepared from said biological sample using the Liquid Tissue™ reagents and protocol and the FASN protein is quantitated in the Liquid Tissue™ sample by the method of SRM/MRM mass spectrometry by quantitating in the protein sample at least one or more of the peptides described. These peptides can be quantitated if they reside in a modified or an unmodified form. An example of a modified form of an FASN peptide is phosphorylation of a tyrosine, threonine, serine, and/or other amino acid residues within the peptide sequence.
摘要:
The current disclosure provides specific peptides, and derived ionization characteristics of the peptides from the estrogen receptor (ER), progesterone receptor (PR), and/or antigen Ki67 (Ki67) proteins that are particularly advantageous for quantifying the ER, PR, and/or Ki67 proteins directly in biological samples that have been fixed in formalin by the method of Selected Reaction Monitoring/Multiple Reaction Monitoring (SRM/MRM) mass spectrometry. Such biological samples are chemically preserved and fixed wherein the biological sample is selected from tissues and cells treated with formaldehyde containing agents/fixatives including formalin-fixed tissue/cells, formalin-fixed/paraffin embedded (FFPE) tissue/cells, FFPE tissue blocks and cells from those blocks, and tissue culture cells that have been formalin fixed and or paraffin embedded. A protein sample is prepared from a biological sample using the Liquid Tissue™ reagents and protocol, and the ER, PR, and/or Ki67 proteins are quantitated in the Liquid Tissue™ sample by the method of SRM/MRM mass spectrometry by quantitating in the protein sample at least one or more of the peptides described for one or more of the ER, PR, and/or Ki67 proteins. These peptides can be quantitated if they reside in a modified or in an unmodified form. An example of a modified form of an ER, PR, and/or Ki67 peptide is phosphorylation of a tyrosine, threonine, serine, and/or other amino acid residues within the peptide sequence.
摘要:
Methods are provided for identifying whether a tumor, and especially a colon tumor, will be responsive to treatment with the therapeutic agent temozolomide. A specific MGMT fragment peptide is precisely detected and quantitated by SRM-mass spectrometry directly in colon cancer cells collected from colon tumor tissue obtained from a cancer patient. Comparison to reference levels determines if the cancer patient will respond positively or negatively to treatment with the chemotherapeutic agent temozolomide.
摘要:
Methods are provided for identifying whether a tumor will be responsive to treatment with an anti-EGFR agent. Specific protein fragment peptides are precisely detected and quantitated by SRM-mass spectrometry directly in tumor cells collected from tumor tissue that was obtained from a cancer patient and compared to reference levels in order to determine if the lung cancer patient will positively respond to treatment with an anti-EGFR agent such as, for example, pamitumumab and/or erbitux.
摘要:
Methods are provided for quantifying CD56 and CHGA proteins directly in formalin-fixed biological samples by Selected Reaction Monitoring (SRM)/Multiple Reaction Monitoring (MRM) mass spectrometry. The biological samples may include formalin-fixed tissue/cells, formalin-fixed/paraffin embedded (FFPE) tissue/cells, and FFPE tissue blocks and cells from those blocks. A protein sample may be prepared from said biological sample using the Liquid Tissue reagents and protocol and a designated protein is quantitated in the Liquid Tissue sample by the method of SRM/MRM mass spectrometry by quantitating in the protein sample at least one peptide fragment derived from each of the proteins.