Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal Cancer
BACKGROUND: In the search for prognostic biomarkers, a significant amount of precious biobanked blood samples is needed for conventional analyses. Solid-phase proximity ligation assay (SP-PLA) is an analytic method with the ability to analyze many proteins at the same time in small amounts of plasma...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2016-06-01
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| Series: | Translational Oncology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1936523315300565 |
| _version_ | 1818349196182290432 |
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| author | Lana Ghanipour Spyros Darmanis Ulf Landegren Bengt Glimelius Lars Påhlman Helgi Birgisson |
| author_facet | Lana Ghanipour Spyros Darmanis Ulf Landegren Bengt Glimelius Lars Påhlman Helgi Birgisson |
| author_sort | Lana Ghanipour |
| collection | DOAJ |
| description | BACKGROUND: In the search for prognostic biomarkers, a significant amount of precious biobanked blood samples is needed for conventional analyses. Solid-phase proximity ligation assay (SP-PLA) is an analytic method with the ability to analyze many proteins at the same time in small amounts of plasma. The aim of this study was to explore the potential use of SP-PLA for biomarker validation in patients with colorectal cancer (CRC). MATERIAL AND METHODS: Plasma samples from patients with stage I to IV CRC, with (n = 31) and without (n = 29) disease dissemination at diagnosis or later, were analyzed with SP-PLA using 35 antibodies targeting an equal number of proteins in 5-μl plasma samples. Carcinoembryonic antigen (CEA), analyzed earlier in this cohort using a different technology, was used as a reference. RESULTS: A total of 21 of the 35 investigated proteins were detectable with SP-PLA. Patients in stage II to III with disseminated disease had lower plasma concentrations of HCC-4 (P = .025). Low plasma levels of tissue inhibitor of metalloproteinases–1 were seen in patients with disseminated disease stage II (P = .003). The level of CEA was higher in patients with disease dissemination compared with those without (P = .007). CONCLUSION: SP-PLA has the ability to analyze many protein markers simultaneously in a small amount of blood. However, none of the markers selected for the present SP-PLA analyses gave better prognostic information than CEA. |
| first_indexed | 2024-12-13T18:02:06Z |
| format | Article |
| id | doaj.art-d4c59c7bd4a949ff9b1d303ae495da43 |
| institution | Directory Open Access Journal |
| issn | 1936-5233 1944-7124 |
| language | English |
| last_indexed | 2024-12-13T18:02:06Z |
| publishDate | 2016-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Translational Oncology |
| spelling | doaj.art-d4c59c7bd4a949ff9b1d303ae495da432022-12-21T23:36:11ZengElsevierTranslational Oncology1936-52331944-71242016-06-019325125510.1016/j.tranon.2016.04.001Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal CancerLana Ghanipour0Spyros Darmanis1Ulf Landegren2Bengt Glimelius3Lars Påhlman4Helgi Birgisson5Department of Surgical Science, University of Uppsala, Uppsala, SwedenDepartment of Immunology, Genetics and Pathology, Science for Life Laboratory, University of Uppsala, Uppsala, SwedenDepartment of Immunology, Genetics and Pathology, Science for Life Laboratory, University of Uppsala, Uppsala, SwedenDepartment of Radiology, Oncology and Radiation Science, University of Uppsala, Uppsala, SwedenDepartment of Surgical Science, University of Uppsala, Uppsala, SwedenDepartment of Surgical Science, University of Uppsala, Uppsala, SwedenBACKGROUND: In the search for prognostic biomarkers, a significant amount of precious biobanked blood samples is needed for conventional analyses. Solid-phase proximity ligation assay (SP-PLA) is an analytic method with the ability to analyze many proteins at the same time in small amounts of plasma. The aim of this study was to explore the potential use of SP-PLA for biomarker validation in patients with colorectal cancer (CRC). MATERIAL AND METHODS: Plasma samples from patients with stage I to IV CRC, with (n = 31) and without (n = 29) disease dissemination at diagnosis or later, were analyzed with SP-PLA using 35 antibodies targeting an equal number of proteins in 5-μl plasma samples. Carcinoembryonic antigen (CEA), analyzed earlier in this cohort using a different technology, was used as a reference. RESULTS: A total of 21 of the 35 investigated proteins were detectable with SP-PLA. Patients in stage II to III with disseminated disease had lower plasma concentrations of HCC-4 (P = .025). Low plasma levels of tissue inhibitor of metalloproteinases–1 were seen in patients with disseminated disease stage II (P = .003). The level of CEA was higher in patients with disease dissemination compared with those without (P = .007). CONCLUSION: SP-PLA has the ability to analyze many protein markers simultaneously in a small amount of blood. However, none of the markers selected for the present SP-PLA analyses gave better prognostic information than CEA.http://www.sciencedirect.com/science/article/pii/S1936523315300565 |
| spellingShingle | Lana Ghanipour Spyros Darmanis Ulf Landegren Bengt Glimelius Lars Påhlman Helgi Birgisson Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal Cancer Translational Oncology |
| title | Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal Cancer |
| title_full | Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal Cancer |
| title_fullStr | Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal Cancer |
| title_full_unstemmed | Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal Cancer |
| title_short | Detection of Biomarkers with Solid-Phase Proximity Ligation Assay in Patients with Colorectal Cancer |
| title_sort | detection of biomarkers with solid phase proximity ligation assay in patients with colorectal cancer |
| url | http://www.sciencedirect.com/science/article/pii/S1936523315300565 |
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