Experimental inoculation model of Walker 256 carcinoma into vagina and cervix uteri of female rats.
OBJECTIVE
To establish an inoculation model of Walker 256 carcinoma on cervix uteri and vagina of rats.


METHODS
Fifteen female rats were used, and assigned to three groups each one with five rats: group A - rats with 4 x 10(6) cells of Walker 256 carcinoma without acid acetic inoculation; group B - rats with 2 x 10(6) cells of Walker 256 carcinoma with acid acetic inoculation and group C: rats with 4 x 10(6) cells of Walker 256 carcinoma with acid acetic inoculation. The day before tumor cells inoculation the rats from groups B and C were anaesthetized with diethylether and 0,3 ml of acetic acid was inoculated into their vaginas. Tumor cell inoculation into the vagina and cervix was done under general anesthesia with diethylether. Then a endocervical brush was used to scrape the vaginal wall and after that 0,3 ml of the liquid containing tumor cells was inoculated on the vagina and cervix. For the tumor analysis, animals were euthanized at day 12 following tumor cell implantation by an excessive inhalation of diethylether. Tumor was resected entirely and weighed and the tumors were then sectioned and counter stained with hematoxylin and eosin for histopathologic evaluation. It was also calculated the percentage of tumor equivalent to the body weight by the formula: P= tumor weight / body weight x 100. Data were analyzed by one-way analysis of variance - ANOVA. P values < 0.05 were taken to indicate statistical significance.


RESULTS
Implantation and growth on GB and GC was 100% and on GA 20%. There was no statistical difference between GB and GC averages.


CONCLUSIONS
According to the methods used, the Walker 256 carcinoma inoculation model into vagina and cervix have an implantation and growth rate of 100% when associated with previous acid acetic inoculation and there is no behavioral difference between using 2 x 10(6) or 4 x 10(6) cells on its inoculation.
Brito
Nara Macedo Botelho
NM
Department of Specialized Health, UEPA, Pará, Brazil. narabrito@amazon.com.br
Brito
Marcus Vinicius Henriques
MV
Carvalho
Rita de Kássia Vidigal
Rde K
Matos
Lia Tavares de Moura Brasil
LT
Veloso
Thiago Sousa
TS
Vasconcelos
Diego Matos de
DM
Brito
Rosângela Baía
RB
D000818:Animals; D002279:Carcinoma 256, Walker / Q000473:pathology*; D004195:Disease Models, Animal; D005260:Female; D009368:Neoplasm Transplantation / Q000379:methods; D051381:Rats; D017208:Rats, Wistar; D002583:Uterine Cervical Neoplasms / Q000473:pathology*; D014625:Vaginal Neoplasms / Q000473:pathology*