NTPDase3 and ecto-5'-nucleotidase/CD73 are differentially expressed during mouse bladder cancer progression.
According to the World Health Organization, bladder cancer is the seventh most common cancer among men in the world. The current treatments for this malignancy are not efficient to prevent the recurrence and progression of tumors. Then, researches continue looking for better therapeutic targets which can end up in new and more efficient treatments. One of the recent findings was the identification that the purinergic system was involved in bladder tumorigenesis. The ectonucleotidases, mainly ecto-5'-nucleotidase/CD73 have been revealed as new players in cancer progression and malignity. In this work, we investigated the NTPDase3 and ecto-5'-nucleotidase/CD73 expression in cancer progression in vivo. Bladder tumor was induced in mice by the addition of 0.05 % of N-butyl-N-(hydroxybutyl)-nitrosamine (BBN) in the drinking water for 4, 8, 12, 18, and 24 weeks. After this period, mice bladders were removed for histopathology analysis and immunofluorescence assays. The bladder of animals which has received BBN had alterations, mainly inflammation, in initial times of tumor induction. After 18 weeks, mice's bladder has developed histological alterations similar to human transitional cell carcinoma. The cancerous urothelium, from mice that received BBN for 18 and 24 weeks, presented a weak immunostaining to NTPDase3, in contrast to an increased expression of ecto-5'-nucleotidase/CD73. The altered expression of NTPDase3 and ecto-5'-nucleotidase/CD73 presented herein adds further evidence to support the idea that alterations in ectonucleotidases are involved in bladder tumorigenesis and reinforce the ecto-5'-nucleotidase/CD73 as a future biomarker and/or a target for pharmacological therapy of bladder cancer.
Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil, lilarockk@gmail.com.
Liliana
L
Rockenbach
Elizandra
E
Braganhol
Fabrícia
F
Dietrich
Fabrício
F
Figueiró
Manoella
M
Pugliese
Maria Isabel Albano
MI
Edelweiss
Fernanda Bueno
FB
Morrone
Jean
J
Sévigny
Ana Maria Oliveira
AM
Battastini
D015720:5'-Nucleotidase / Q000096:biosynthesis*; D000818:Animals; D018450:Disease Progression; D015972:Gene Expression Regulation, Neoplastic; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D011755:Pyrophosphatases / Q000096:biosynthesis*; D001749:Urinary Bladder Neoplasms / Q000201:enzymology* / Q000473:pathology
D015720:5'-Nucleotidase; D011755:Pyrophosphatases; C439652:nucleoside-triphosphate diphosphohydrolase 3