Abstract:
:Immunocytochemical detection of isolated tumor cells in peripheral blood and bone marrow is currently the most established method for monitoring early dissemination in epithelial cancer. In this study we used an immunomagnetic selection technique to develop an enrichment model for disseminated tumor cells in blood. Buffy coat cells spiked with varying numbers of BT-474 carcinoma cells were permeabilized and fixed, following which carcinoma cells were magnetically labelled with an anti-cytokeratin 8 mAb. Labelled cells were enriched by the use of magnetic columns. The eluted cytokeratin 8+ tumor cells were detected by flow cytometry and immunocytochemistry. Spiked samples were split and processed freshly in the immunomagnetic enrichment assay, as well as cryopreserved and processed in the assay after thawing. Enumeration of BT-474 cells demonstrated a detection limit of one BT-474 cell in 1.0 x 10(7) leukocytes in both fresh and cryopreserved-thawed samples. The pair wise comparison showed a significantly higher recovery of spiked BT-474 cells from freshly processed samples than from cryopreserved and thawed samples (57% vs 21%). Viability tests suggested that this outcome might be due to a greater susceptibility of BT-474 cells than buffy coat cells to the used cryopreservation and thawing technique. Altogether our findings show that the performance of the immunomagnetic enrichment assay on fresh samples is satisfactory with a recovery rate of almost 60% and a sensitivity of 10(-7). However, performance of the assay on cryopreserved and thawed cells needs to be improved.
journal_name
J Biol Regul Homeost Agentsjournal_title
Journal of biological regulators and homeostatic agentsauthors
Brooimans RA,de Leeuw N,Bontenbal M,Gratama JWkeywords:
subject
Has Abstractpub_date
2005-01-01 00:00:00pages
84-91issue
1-2eissn
0393-974Xissn
1724-6083journal_volume
19pub_type
杂志文章abstract::Congenital melanocytic nevi are relatively rare lesions (1-6%). Their size and location can cause cosmetic and functional disorders of varying degrees of severity, but in addition they can also undergo transformation to malignant melanoma. Different types of treatments have been described as being effective for these ...
journal_title:Journal of biological regulators and homeostatic agents
pub_type: 杂志文章
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
pub_type: 临床试验,杂志文章,多中心研究
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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journal_title:Journal of biological regulators and homeostatic agents
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