Immunodetection of cells with a CD44+/CD24- phenotype in canine mammary neoplasms

BMC Veterinary Research

Antonio Carlos Alessi²  Mayara Caroline Rosolem²  Pamela Rodrigues Reina Moreira²  Márcio de Barros Bandarra²  Rosemeri de Oliveira Vasconcelos²  Erika Maria Terra¹  Geórgia Modé Magalhães² 

[1] Department of Clinics and Surgery, FCAV/UNESP-Jaboticabal, Address: Prof. Paulo DonatoCastellane, s/n, Jaboticabal, Sao Paulo 14884-900, Brazil;Faculdade de Ciências Agrárias e Veterinárias – FCAV/UNESP – Univ Estadual Paulista, Jaboticabal, Sao Paulo, Brazil

关键词: Stem cells;    Canine;    Mammary neoplasia;    Oncology;    Canine neoplasia;    CD24;    CD44;    Cancer stem cells;   

Others  :  1119433
DOI  :  10.1186/1746-6148-9-205

 received in 2013-03-28, accepted in 2013-10-07,  发布年份 2013

【 摘 要 】

Background

Cancer stem cells (CSCs) are able to self-renew and to form metastases. Using flow cytometry, CSCs were detected in canine mammary tumors as cells CD44⁺ and CD24^-. The aim of this study was to detect these CSCs by immunohistochemistry and correlate their frequency with canine mammary neoplasm grade and histopathological type.

130 mammary neoplasm samples were selected from tissue blocks at the Department of Pathology at UNESP and classified according to (BJVP 4:153-180, [2011]). These samples were composed by adenomas, lymph node metastases, solid carcinomas grades II and III, tubular, papillary and carcinomas in mixed tumor grades I, II and III. Immunohistochemistry was performed with antibodies against CD44 and CD24. Linear regression was performed using Pearson’s correlation test.

Results

The value at CD44 was positive and CD24 becomes zero was 46.75%. Cells with a CD44⁺/CD24^- phenotype were detected in 40 out of 130 samples with an advantage of high grade tumors (II and III) and metastases among tubular, papillary and carcinomas in mixed tumors. In these samples, percentages of cells stained by CD44 and CD24 antibodies were 62.2% and 0%, respectively. Published reports usually correlate grade III tumors with the expression of CD44 but not with CD24 expression. Studies using flow cytometry have found CSC frequencies similar to those found in our study.

Conclusions

Immunohistochemistry was found to be a reliable technique for the detection of CSCs in canine mammary neoplasms, and the frequency of these cells positively correlates with grades II and III tumors (poor prognosis).

【 授权许可】

   
2013 Magalhães et al.; licensee BioMed Central Ltd.

【 图 表 】

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