Journal article
Phenotyping of lymphocytes expressing regulatory and effector markers in infiltrating ductal carcinoma of the breast
Immunology letters, Vol.102(2), pp.229-236
2006
Handle:
https://hdl.handle.net/2376/111212
PMID: 16246429
Abstract
Dysfunction of the host immune system in cancer patients can be due to a number of reasons including suppression of tumour associated antigen reactive lymphocytes by regulatory T (Treg) cells. In this study, we used flow cytometry to determine the phenotype and relative abundance of the tumour infiltrating lymphocytes (TILs) from 47 enzymatically dissociated tumour specimens from patients with infiltrating ductal carcinoma (IDC) of the breast. The expression of both effector and regulatory markers on the TILs were determined by using a panel of monoclonal antibodies. Analysis revealed CD8
+ T cells (23.4
±
2.1%) were predominant in TILs, followed by CD4
+ T cells (12.6
±
1.7%) and CD56
+ natural killer cells (6.4
±
0.7%). The CD4
+/CD8
+ ratio was 0.8
±
0.9%. Of the CD8
+ cells, there was a higher number (68.4
±
3.5%) that expressed the effector phenotype, namely, CD8
+CD28
+ and about 46% of this subset expressed the activation marker, CD25. Thus, a lower number of infiltrating CD8
+ T cells (31.6
±
2.8%) expressed the marker for the suppressor phenotype, CD8
+CD28
−. Of the CD4
+ T cells, 59.6
±
3.9% expressed the marker for the regulatory phenotype, CD4
+CD25
+. About 43.6
±
3.8% CD4
+CD25
+ subset co-expressed both the CD152 and FOXP3, the Treg-associated molecules. A positive correlation was found between the presence of CD4
+CD25
+ subset and age (≥50 years old) (
r
=
0.51;
p
=
0.045). However, no significant correlation between tumour stage and CD4
+CD25
+ T cells was found. In addition, we also found that the CD4
+CD25
− subset correlated with the expression of the nuclear oestrogen receptor (ER)-α in the tumour cells (
r
=
0.45;
p
=
0.040). In conclusion, we detected the presence of cells expressing the markers for Tregs (CD4
+CD25
+) and suppressor (CD8
+CD28
−) in the tumour microenvironment. This is the first report of the relative abundance of Treg co-expressing CD152 and FOXP3 in breast carcinoma.
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Details
- Title
- Phenotyping of lymphocytes expressing regulatory and effector markers in infiltrating ductal carcinoma of the breast
- Creators
- Pooi Pooi Leong - Department of Clinical Laboratory Sciences, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 Seri Kembangan, Selangor, MalaysiaRohaizak Mohammad - Department of Surgery, Faculty of Medicine, Hospital Universiti Kebangasaan Malaysia, 56000 Cheras, Selangor, MalaysiaNaqiyah Ibrahim - Department of Surgery, Faculty of Medicine, Hospital Universiti Kebangasaan Malaysia, 56000 Cheras, Selangor, MalaysiaHairuszah Ithnin - Department of Clinical Laboratory Sciences, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 Seri Kembangan, Selangor, MalaysiaMaha Abdullah - Department of Clinical Laboratory Sciences, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 Seri Kembangan, Selangor, MalaysiaWilliam C Davis - Department of Veterinary Microbiology & Pathology, College of Veterinary Medicine, P.O. Box 647010, Washington State University, Pullman, WA 99164-7010, USAHeng Fong Seow - Department of Clinical Laboratory Sciences, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 Seri Kembangan, Selangor, Malaysia
- Publication Details
- Immunology letters, Vol.102(2), pp.229-236
- Academic Unit
- Veterinary Microbiology and Pathology, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900547122901842
- Language
- English
- Resource Type
- Journal article