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Detection of micro-metastases by flow cytometry in lymph nodes from patients with penile cancer
Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Urology and Andrology. Department of Medicine, Immunology and Allergy Unit, Karolinska University Hospital, SE-171 76 Stockholm, Sweden.
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2018 (English)In: BMC Urology, ISSN 1471-2490, E-ISSN 1471-2490, Vol. 18, no 1, article id 86Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: The tumor draining lymph node concept was first described in penile cancer for staging. Immunohistochemistry and histopathology evaluations are routinely used in clinical practice to examine lymph nodes for metastasis. However, these methods are time-consuming with low diagnostic accuracy and micro-metastases might be missed. In this study, we aim to evaluate detection of metastatic cells in draining lymph nodes by flow cytometry.

METHODS: To assess the sensitivity of micro-metastasis detection by FACS (Fluorescence-activated cell sorting), HeLa cells were titrated into Peripheral blood mononuclear cells (PBMCs) and expression of pan-cytokeratin AE1/AE3 was analyzed. Single cell suspensions were separately prepared from 10 regional lymph nodes obtained from 5 patients with invasive penile cancer undergoing radical surgery and lymph node dissection. Lymph node dereived cells were examined for cell surface expression of EpCAM, E-cadherin and intracellular expression of pan-cytokeratin AE1/AE3 by FACS.

RESULTS: Ten lymph nodes from 5 penile cancer patients were investigated in a head-to-head comparison between FACS and pathology examination of sections. All metastatic lymph nodes verified by pathology examination were also identified by FACS. Two additional lymph nodes with micro-metastases were diagnosed by FACS only.

CONCLUSIONS: FACS analyses of pan-cytokeratin AE1/AE3 stained single cells from tumor draining lymph nodes can be used to detect micro-metastases in patients with penile cancer patients.

Place, publisher, year, edition, pages
BioMed Central, 2018. Vol. 18, no 1, article id 86
Keywords [en]
Flow cytometry, Micro-metastasis detection, Pan-cytokeratin AE1/AE3, Penile cancer, Tumor draining lymph nodes
National Category
Urology and Nephrology
Identifiers
URN: urn:nbn:se:umu:diva-152536DOI: 10.1186/s12894-018-0399-3ISI: 000446461000001PubMedID: 30290760OAI: oai:DiVA.org:umu-152536DiVA, id: diva2:1254758
Funder
Swedish Cancer SocietyWallenberg FoundationsSwedish Research CouncilAvailable from: 2018-10-10 Created: 2018-10-10 Last updated: 2018-10-31Bibliographically approved

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Zirakzadeh, Ali A .Sherif, Amir

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