Study of Interleukin-10 Gene Expression in Breast carcinoma in Telangana Population

Abstract

Background: Carcinoma breast is the second most common malignancy next to carcinoma cervix in India and
abroad. Hence, the expression of IL-10 m-RNA gene in tumour can be a novel prognostic indicator.
Method: 30 mastectomy specimens of carcinoma Breast patients aged between 30 to 70 years were studied. 2
to 5 gram of tumour tissue and equivalent sample from normal peri-tumoral breast were taken from resected
breast immediately after surgery and preserved in RNA-later solution. IL-10 m-RNA expression was detected
and quantified by RT-PCR analysis through TaqMan chemistry, on 30 samples and 30 controls. After fixation with
formalin 2 micro sections of 4-5micron thickness were taken from tumor area and corresponding paraffin blocks
were prepared, mounted, on albumin coated slide for H & E staining and results were observed and recorded.
Results: Histologically, 08 specimens were diagnosed as grade-I (26.5%), 16 were grade-II (53.5%) and 06 were
grade-III (20%). 10 specimens (33.5%) had reactive lymph node, and the remaining 20 (66.5%) had metastatic
lymph node. Mean RQ values for IL-10 were calculated by the formula for comparative ct (cycle threshold)
method. 26 neoplastic tissue specimens (86.5%) showed strong expression of IL-10 mRNA, while only 2 (6.5%)
normal peritumoral surrounding tissue showed IL-10 expression. 4 (13.5%) neoplastic tissue and 28 (93.5%) peritumoral
tissue showed weak expression of IL-10. All grade 3 tumours showed strong expression of IL-10.
Conclusion: Present pragmatic study had evidence that, IL-10 m-RNA gene expression was significant in neoplastic
breast tissue and may have potential prognostic significance.