Author/Editor		Erman, Andreja; Kamenšek, Urška; Dragin Jerman, Urška; Pavlin, Mojca; Čemažar, Maja; Veranič, Peter; Romih, Rok
Title		How cancer cells invade bladder epithelium and form tumors
Type		članek
Vol. and No.		Letnik 22, št. 12
Publication year		2021
Volume		str. 1-20
ISSN		1422-0067 - International journal of molecular sciences
Language		eng
Abstract		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 [alpha]3[beta]1 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.
Keywords		model tumorja mišičnega mehurja tumor mehurja MB49 rakave celice mouse bladder tumor model urinary bladder MB49 cancer cells