scholarly journals 10O_PR Prognostic Significance of Progesterone Receptor-Positive Tumor Cells Within Immunohistochemically-Defined Luminal A Breast Cancer

2012 ◽  
Vol 23 ◽  
pp. ii17-ii18 ◽  
Author(s):  
A. Prat ◽  
M.C. Cheang ◽  
M. Martín ◽  
E. Carrasco ◽  
R. Caballero ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Progesterone Receptor ◽  
Tumor Cells ◽  
Prognostic Significance ◽  
Luminal A

scholarly journals Prognostic Significance of Progesterone Receptor–Positive Tumor Cells Within Immunohistochemically Defined Luminal A Breast Cancer

2013 ◽  
Vol 31 (2) ◽  
pp. 203-209 ◽  
Author(s):  
Aleix Prat ◽  
Maggie Chon U. Cheang ◽  
Miguel Martín ◽  
Joel S. Parker ◽  
Eva Carrasco ◽  
...  
Keyword(s):  
Gene Expression ◽  
Progesterone Receptor ◽  
Tumor Cells ◽  
Prognostic Value ◽  
Prognostic Significance ◽  
Cáncer De Mama ◽  
Breast Cancers ◽  
Luminal A ◽  
Data Set ◽  
Gene And Protein Expression

Purpose Current immunohistochemical (IHC)-based definitions of luminal A and B breast cancers are imperfect when compared with multigene expression-based assays. In this study, we sought to improve the IHC subtyping by examining the pathologic and gene expression characteristics of genomically defined luminal A and B subtypes. Patients and Methods Gene expression and pathologic features were collected from primary tumors across five independent cohorts: British Columbia Cancer Agency (BCCA) tamoxifen-treated only, Grupo Español de Investigación en Cáncer de Mama 9906 trial, BCCA no systemic treatment cohort, PAM50 microarray training data set, and a combined publicly available microarray data set. Optimal cutoffs of percentage of progesterone receptor (PR) –positive tumor cells to predict survival were derived and independently tested. Multivariable Cox models were used to test the prognostic significance. Results Clinicopathologic comparisons among luminal A and B subtypes consistently identified higher rates of PR positivity, human epidermal growth factor receptor 2 (HER2) negativity, and histologic grade 1 in luminal A tumors. Quantitative PR gene and protein expression were also found to be significantly higher in luminal A tumors. An empiric cutoff of more than 20% of PR-positive tumor cells was statistically chosen and proved significant for predicting survival differences within IHC-defined luminal A tumors independently of endocrine therapy administration. Finally, no additional prognostic value within hormonal receptor (HR) –positive/HER2-negative disease was observed with the use of the IHC4 score when intrinsic IHC-based subtypes were used that included the more than 20% PR-positive tumor cells and vice versa. Conclusion Semiquantitative IHC expression of PR adds prognostic value within the current IHC-based luminal A definition by improving the identification of good outcome breast cancers. The new proposed IHC-based definition of luminal A tumors is HR positive/HER2 negative/Ki-67 less than 14%, and PR more than 20%.

scholarly journals Microvessel Density and Mammaglobin A Expression as Prognostic Markers in Molecular Types of Breast Cancer

2019 ◽  
Vol 70 (7) ◽  
pp. 2671-2676
Author(s):  
Adriana Andreea Jitariu ◽  
Amalia Raluca Ceausu ◽  
Adriana Meche ◽  
Cristian Nica ◽  
Amelia Burlea ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Tumor Cells ◽  
Microvessel Density ◽  
Ductal Carcinoma ◽  
Hot Spot ◽  
Histopathological Diagnosis ◽  
Breast Cancers ◽  
Breast Cancer Patients ◽  
Luminal A ◽  
Mean Values

Increased microvessel density (MVD) values in breast cancer correlate with tumor growth and progression while mammaglobin (MGB) expression in tumor cells is associated with a favorable prognosis. We aim to evaluate and correlate MVD values with MGB expression in molecular types of breast cancer specimens and to determine their utility as prognostic biological markers. A number of 52 breast cancer specimens were included in the study. Specimens were processed for routine histopathological diagnosis followed by the molecular classification by means of estrogen (ER), progesterone (PR) and HER2 immunohistochemical reactions. After performing immunohistochemistry for CD34 and MGB, MVD evaluation was made using the �hot spot� method for each case and MGB was scored between 0 (negative) and +3 (strong positive) depending on the intensity and distribution of the staining. MGB expression in tumor cells and MVD mean values were extremely variable. The greatest MVD mean values were obtained in luminal B followed by HER2, luminal A and triple negative breast cancer (TNBC) (95.33, 69, 62, and 40, respectively). MGB expression in the tumor cells generally ranged from mild to weak and was strong only in a few invasive ductal carcinoma cases. In cases with TNBCs the expression of MGB in tumor cells was weak and focal or negative. This variability was noticed between the molecular types of breast cancers and even within the same molecular type. In a restricted number of cases, MGB positive tumors were associated with low MVD values while the negative cases were characterized by increased MVD mean values. The variable results we obtained regarding the correlation between MVD and MGB in breast cancer specimens may indicate a rather restricted use of MVD/MGB in estimating breast cancer patients� prognosis.

Prognostic Significance of Residual Axillary Nodal Micrometastases and Isolated Tumor Cells After Neoadjuvant Chemotherapy for Breast Cancer

2019 ◽  
Vol 26 (11) ◽  
pp. 3502-3509 ◽  
Author(s):  
Stephanie M. Wong ◽  
Nora Almana ◽  
Jungeun Choi ◽  
Jiani Hu ◽  
Haley Gagnon ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Neoadjuvant Chemotherapy ◽  
Tumor Cells ◽  
Prognostic Significance ◽  
Isolated Tumor Cells

scholarly journals Progesterone Receptor B signaling Reduces Breast Cancer Cell Aggressiveness: Role of Cyclin-D1/Cdk4 Mediating Paxillin Phosphorylation

Cancers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1201 ◽  
Author(s):  
Francesca Ida Montalto ◽  
Francesca Giordano ◽  
Chiara Chiodo ◽  
Stefania Marsico ◽  
Loredana Mauro ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cell Migration ◽  
Progesterone Receptor ◽  
Cyclin D1 ◽  
Cancer Cell ◽  
Breast Cancer Cell ◽  
Breast Epithelial Cell ◽  
Luminal A ◽  
Progesterone Receptor B

Progesterone-Receptor (PR) positivity is related with an enhanced response to breast cancer therapy, conversely cyclin D1 (CD1) is a retained marker of poor outcome. Herein, we demonstrate that hydroxyprogesterone (OHPg) through progesterone receptor B (PR-B) reduces breast cancer cell aggressiveness, by targeting the cytoplasmic CD1. Specifically, OHPg diminishes CD1 expression by a transcriptional regulation due to the recruitment of PR-B at a canonical half-PRE site of the CD1 promoter, together with HDAC1, determining a chromatin conformation less prone for gene transcription. CD1, together with its kinase partner Cdk4, regulates cell migration and metastasis, through the association with key components of focal adhesion, such as Paxillin (Pxn). Kaplan-Meier analysis shows that low Pxn expression was associated with increased distant metastasis-free survival in luminal A PR+ breast carcinomas. Interestingly, OHPg treatment reduced Pxn content in T47-D and MCF-7 cells; besides, the interaction between endogenous cytoplasmic CD1/Cdk4 with Pxn was reduced. This was consistent with the reduction of p-Ser83Pxn levels, crucially causing the delay in cell migration and a concomitant inhibition of Rac1 activity and p-PAK. Collectively, these findings support the role of PR-B in breast epithelial cell integrity and reinforce the importance in targeting PR-B as a potential strategy to restrict breast tumor cell invasion and metastasis.

scholarly journals A Comparison of Three Methods for the Detection of Circulating Tumor Cells in Patients with Early and Metastatic Breast Cancer

2017 ◽  
Vol 44 (2) ◽  
pp. 594-606 ◽  
Author(s):  
Eleni Politaki ◽  
Sofia Agelaki ◽  
Stella Apostolaki ◽  
Dora Hatzidaki ◽  
Areti Strati ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Overall Survival ◽  
Metastatic Breast Cancer ◽  
Tumor Cells ◽  
Prognostic Significance ◽  
Metastatic Breast ◽  
Double Immunofluorescence ◽  
First Line ◽  
Detection Rates ◽  
Line Chemotherapy

Background: We directly compared CTC detection rates and prognostic significance, using three different methods in patients with breast cancer (BC). Methods: Early (n=200) and metastatic (n=164) patients were evaluated before initiating adjuvant or first-line chemotherapy, using the CellSearchTM System, an RT-qPCR for CK-19 mRNA detection and by double immunofluorescence (IF) microscopy using A45-B/B3 and CD45 antibodies. Results: Using the CellSearchTM System, 37% and 16.5% of early BC patients were CTC-positive (at ≥1 and ≥2 CTCs/23 ml of blood), 18.0% by RT-qPCR and 16.9% by IF; no agreement was observed between methods. By the CellSearchTM 34.8% and 53.7% (at≥ 5 and ≥ 2 CTCs/7.5 ml) of metastatic patients were CTC-positive, 37.8% by RT-qPCR and 28.5% by IF. A significant agreement existed only between the CellSearchTM and RT-qPCR. In 60.8% of cases, differential EpCAM and CK-19 expression on CTCs by IF could explain the discrepancies between the CellSearchTM and RT-qPCR. CTC-positivity by either method was associated with decreased overall survival in metastatic patients. Conclusion: A significant concordance was observed between the CellSearchTM and RT-qPCR in metastatic but not in early BC. Discordant results could be explained in part by CTC heterogeneity. CTC detection by all methods evaluated had prognostic relevance in metastatic patients.

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