How cancer cells invade bladder epithelium and form tumors : the mouse bladder tumor model as a model of tumor recurrence in patients

Erman, Andreja (author), Kamenšek, Urška (author), Dragin Jerman, Urška (author), Pavlin, Mojca (author), Čemažar, Maja (author), Veranič, Peter (author), Romih, Rok (author)

Non-muscle-invasive bladder cancer is the most common form of bladder cancer. The main problem in managing bladder tumors is the high recurrence after the transurethral resection of bladder tumors (TURBT). Our study aimed to examine the fate of intravesically applied cancer cells as the implantation of cancer cells after TURBT is thought to be a cause of tumor recurrence. We established an orthotopic mouse bladder tumor model with MB49-GFP cancer cells and traced them during the first three days to define their location and contacts with normal urothelial cells. Data were obtained by Western blot, immunolabeling, and light and electron microscopy. We showed that within the first two hours, applied cancer cells adhered to the traumatized epithelium by cell projections containing α3β1 integrin on their tips. Cancer cells then migrated through the epithelium and on day 3, they reached the basal lamina or even penetrated it. In established bladder tumors, E-cadherin and desmoplakin 1/2 were shown as feasible immunohistochemical markers of tumor margins based on the immunolabeling of various junctional proteins. Altogether, these results for the first time illustrate cancer cell implantation in vivo mimicking cellular events of tumor recurrence in bladder cancer patients.

• Language: English
• Keywords: mouse bladder tumor model, urinary bladder, MB49 cancer cells, bladder tumor, urothelium, intercellular junctions, junctional protein
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: MF - Faculty of Medicine; FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 20 str.
• Numbering: Vol. 22, iss. 12, art. 6328
• PID: 20.500.12556/RUL-135655
• UDC: 616-006
• ISSN on article: 1422-0067
• DOI: 10.3390/ijms22126328
• COBISS.SI-ID: 67627523
• Publication date in RUL: 23.03.2022

Record is a part of a journal

• Title: International journal of molecular sciences
• Shortened title: Int. j. mol. sci.
• Publisher: MDPI
• ISSN: 1422-0067
• COBISS.SI-ID: 2779162

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 13.06.2021

Secondary language

• Language: Slovenian
• Keywords: model tumorja mišičnega mehurja, tumor mehurja, MB49 rakave celice