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Prognostic value of p53 expression in hormone receptor-positive and human epidermal growth factor receptor 2-negative breast cancer patients receiving neoadjuvant chemotherapy. Breast Cancer Res Treat 2021; 187:447-454. [PMID: 33599867 DOI: 10.1007/s10549-021-06134-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 02/05/2021] [Indexed: 10/22/2022]
Abstract
PURPOSE The aim of this study was to determine whether the outcome to neoadjuvant chemotherapy (NAC) can be predicted by analyzing p53 expression in hormone receptor (HR)-positive and human epidermal growth factor receptor 2 (HER2)-negative breast cancer patients. METHODS We retrospectively reviewed 594 patients diagnosed with stage I-III HR-positive, HER2-negative breast cancer, and treated with NAC at the Asan Medical Center between 2008 and 2014. Expression of p53 was assessed, and overall survival (OS) and breast cancer-specific survival (BCSS) were investigated and compared between groups. RESULTS At a median follow-up period of 69.8 months, OS and BCSS were higher in the p53-negative (p53(-)) group than in the p53-positive (p53(+)) group. Five-year OS was 95.4% in the p53(-) and 92.1% in the p53(+) group (p = 0.005). BCSS was 96.2% in the p53(-) group and 93% in the p53(+) group (p = 0.008). CONCLUSION High expression of immunohistochemically detected p53 was strongly and significantly associated with decreased OS and BCSS than low p53 expression, suggesting that p53 may be a powerful prognostic factor in HR-positive, HER2-negative breast cancer patients receiving NAC.
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Chen S, Meng T, Zheng X, Cai J, Zhang W, You H, Xing J, Dong Y. Contribution of nucleophosmin overexpression to multidrug resistance in breast carcinoma. J Drug Target 2018; 26:27-35. [PMID: 28562134 DOI: 10.1080/1061186x.2017.1332066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Multidrug resistance (MDR) is a serious obstacle in breast cancer patients which limits chemotherapeutic drugs application. Our previous study confirmed that overexpression of nucleophosmin (NPM) was closely related to MDR in methotrexate-resistant breast cancer cells (MCF-7/MTX), and NPM could be a potential therapeutic target for chemoresistance. In this work, we aim to investigate NPM-mediated resistance mechanism in breast carcinoma. The NPM level was strongly positive in breast carcinoma tissues compared with adjacent normal samples, which was associated with lymph node metastasis. We found abnormal expression of NPM activated PI3K/Akt pathway and affected downstream apoptosis factors. Then, NPM level was attenuated by RNA interfering technology, the sensitivity of MCF-7/MTX cells to methotrexate was obviously increased, factor level of mitochondria apoptosis pathway was significantly augmented, and Akt phosphorylation was inhibited. Furthermore, examination of Akt and NPM level demonstrated that Akt inhibitor MK-2206 sensitised resistant cells to methotrexate and induced MCF-7/MTX cell apoptosis by PI3K/Akt pathway and mitochondria apoptosis pathway. These suggested NPM-induced resistance and anti-apoptosis were required for Akt activity. NPM has a crucial function in MDR of breast cancer through influencing Akt activity and resistant cell apoptosis, and it could be expected to become a therapeutic target for chemoresistance in breast cancer.
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Affiliation(s)
- Siying Chen
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Ti Meng
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Xiaowei Zheng
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Jiangxia Cai
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China.,b Department of Pharmacy , The People's Hospital of Bayingol Mongolian Autonomous Prefecture , Korla , Xinjiang , China
| | - Weipeng Zhang
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Haisheng You
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Jianfeng Xing
- c School of Pharmacy , Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Yalin Dong
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
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Immunohistochemical Expression of Ki67 and HER2 in Colorectal Cancer Compared to Adenomatous and Normal Samples. INTERNATIONAL JOURNAL OF CANCER MANAGEMENT 2017. [DOI: 10.5812/ijcm.12252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Moore LJ, Roy LD, Zhou R, Grover P, Wu ST, Curry JM, Dillon LM, Puri PM, Yazdanifar M, Puri R, Mukherjee P, Dréau D. Antibody-Guided In Vivo Imaging for Early Detection of Mammary Gland Tumors. Transl Oncol 2016; 9:295-305. [PMID: 27567952 PMCID: PMC5006816 DOI: 10.1016/j.tranon.2016.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 04/28/2016] [Accepted: 05/02/2016] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND: Earlier detection of transformed cells using target-specific imaging techniques holds great promise. We have developed TAB 004, a monoclonal antibody highly specific to a protein sequence accessible in the tumor form of MUC1 (tMUC1). We present data assessing both the specificity and sensitivity of TAB 004 in vitro and in genetically engineered mice in vivo. METHODS: Polyoma Middle T Antigen mice were crossed to the human MUC1.Tg mice to generate MMT mice. In MMT mice, mammary gland hyperplasia is observed between 6 and 10 weeks of age that progresses to ductal carcinoma in situ by 12 to 14 weeks and adenocarcinoma by 18 to 24 weeks. Approximately 40% of these mice develop metastasis to the lung and other organs with a tumor evolution that closely mimics human breast cancer progression. Tumor progression was monitored in MMT mice (from ages 8 to 22 weeks) by in vivo imaging following retro-orbital injections of the TAB 004 conjugated to indocyanine green (TAB-ICG). At euthanasia, mammary gland tumors and normal epithelial tissues were collected for further analyses. RESULTS: In vivo imaging following TAB-ICG injection permitted significantly earlier detection of tumors compared with physical examination. Furthermore, TAB-ICG administration in MMT mice enabled the detection of lung metastases while sparing recognition of normal epithelia. CONCLUSIONS: The data highlight the specificity and the sensitivity of the TAB 004 antibody in differentiating normal versus tumor form of MUC1 and its utility as a targeted imaging agent for early detection, tumor monitoring response, as well as potential clinical use for targeted drug delivery.
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Affiliation(s)
- Laura Jeffords Moore
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA
| | - Lopamudra Das Roy
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA; OncoTAb, Inc., 243 Bioinformatics, 9201 University City Blvd., Charlotte, NC 28223, USA
| | - Ru Zhou
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA
| | - Priyanka Grover
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA
| | - Shu-Ta Wu
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA
| | - Jennifer M Curry
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA
| | - Lloye M Dillon
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA; OncoTAb, Inc., 243 Bioinformatics, 9201 University City Blvd., Charlotte, NC 28223, USA
| | - Priya M Puri
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA
| | - Mahboubeh Yazdanifar
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA
| | - Rahul Puri
- OncoTAb, Inc., 243 Bioinformatics, 9201 University City Blvd., Charlotte, NC 28223, USA
| | - Pinku Mukherjee
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA; OncoTAb, Inc., 243 Bioinformatics, 9201 University City Blvd., Charlotte, NC 28223, USA
| | - Didier Dréau
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223 USA.
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5
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Chen SY, Zheng XW, Cai JX, Zhang WP, You HS, Xing JF, Dong YL. Histone deacetylase inhibitor reverses multidrug resistance by attenuating the nucleophosmin level through PI3K/Akt pathway in breast cancer. Int J Oncol 2016; 49:294-304. [PMID: 27211281 DOI: 10.3892/ijo.2016.3528] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 03/26/2016] [Indexed: 11/05/2022] Open
Abstract
The development of multidrug resistance (MDR) is the major obstacle in the chemotherapy of breast cancer, and it restricts the application of antitumor drugs in the clinic. Therefore it is urgent to search for ways to reverse MDR and restore sensitivity to chemotherapeutics in breast carcinoma. Currently, histone deacetylase inhibitors (HDACIs) offer a promising strategy for tumor therapy as the effective anticancer drugs. Based on the potential resistant target of nucleophosmin (NPM), the purpose of this study was to explore the reversal effect of a new synthetic histone deacetylase inhibitor, FA17, on MDR in methotrexate-resistant breast cancer cells (MCF-7/MTX) and xenograft tumors. It was shown that the abnormal expression of NPM induced MDR and inhibited downstream mitochondrial apoptotic pathway by activating PI3K/Akt signaling pathway in MCF-7/MTX cells. The reversal effect and molecular mechanism of FA17 were investigated both in vitro and in vivo. We found that FA17 could significantly reverse resistance and sensitize MCF-7/MTX cells to methotrexate. FA17 obviously enhanced resistant cell apoptosis, inhibited expressions of NPM and efflux transporters. Additionally, FA17 could reverse MDR via inactivating PI3K/Akt pathway and accelerating mitochondrial apoptotic pathway both in MCF-7/MTX cells and in xenograft tumors. Taken together, the novel histone deacetylase inhibitor could effectively reverse drug resistance due to suppressing the activity of NPM and drug efflux pumps by PI3K/Akt and mitochondrial apoptotic pathway. The above not only indicated the potential applied value of FA17 in reversing MDR and enhancing the sensitivity of chemotherapy, but also confirmed the role of NPM in the development of MDR in breast cancer.
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Affiliation(s)
- Si-Ying Chen
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P.R. China
| | - Xiao-Wei Zheng
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P.R. China
| | - Jiang-Xia Cai
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P.R. China
| | - Wei-Peng Zhang
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P.R. China
| | - Hai-Sheng You
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P.R. China
| | - Jian-Feng Xing
- School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P.R. China
| | - Ya-Lin Dong
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P.R. China
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Nicolini A, Ferrari P, Fulceri F, Carpi A, Rossi G. An individual reference limit for ‘early’ diagnosis of metastatic breast cancer during postoperative follow-up. Biomark Med 2015; 9:307-17. [DOI: 10.2217/bmm.15.6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aims: This study is a clinical pilot study with the principal aim to investigate the accuracy of a panel of serum tumor markers for the early diagnosis of relapses. We propose a systematic use of serum CEA-TPA-CA15.3 tumor marker panel and criteria in order to make it an accurate tool for a postoperative breast cancer monitoring. Materials & methods: 204 disease free breast cancer patients after mastectomy were intensively monitored with serial serum determination of CEA, CA15.3 and TPA. Results: During a mean follow-up of 3.7 years the sensitivity of the CEA-TPA-CA15.3 tumor marker panel was 93%, the specificity was 97.6% and the rate of false ‘warning signals’ per year of follow-up was 9 per 100 patients. Conclusions: Our results show that the proposed tool is promising for a postoperative monitoring of breast cancer patients.
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Affiliation(s)
| | | | | | - Angelo Carpi
- Department of Reproduction & Ageing, University of Pisa, Italy
| | - Giuseppe Rossi
- Unit of Epidemiology & Biostatistics, Institute of Clinical Physiology CNR & G Monasterio Foundation, Pisa, Italy
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7
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Electrochemical immunosensor for the analysis of the breast cancer biomarker HER2 ECD. Talanta 2014; 129:594-9. [DOI: 10.1016/j.talanta.2014.06.035] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 06/11/2014] [Accepted: 06/18/2014] [Indexed: 11/23/2022]
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8
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Holliday C, Rummel S, Hooke JA, Shriver CD, Ellsworth DL, Ellsworth RE. Genomic instability in the breast microenvironment? A critical evaluation of the evidence. Expert Rev Mol Diagn 2014; 9:667-78. [DOI: 10.1586/erm.09.55] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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Identification of p53 and its isoforms in human breast carcinoma cells. ScientificWorldJournal 2014; 2014:618698. [PMID: 24511294 PMCID: PMC3913390 DOI: 10.1155/2014/618698] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 11/12/2013] [Indexed: 02/03/2023] Open
Abstract
In breast carcinoma, disruption of the p53 pathway is one of the most common genetic alterations. The observation that the p53 can express multiple protein isoforms adds a novel level of complexity to the outcome of p53 mutations. p53 expression was analysed by Western immunoblotting and immunohistochemistry using monoclonal antibodies DO-7, Pab240, and polyclonal antiserum CM-1. The more frequently p53-positive nuclear staining has been found in the invasive breast tumors. One of the most intriguing findings is that mutant p53 appears as discrete dot-shaped regions within the nucleus of breast cancer cells. In many malignant cells, the nucleolar sequestration of p53 is evident. These observations support the view that the nucleolus is involved directly in the mediation of p53 function or indirectly by the control of the localization of p53 interplayers. p53 expressed in the nuclear fraction of breast cancer cells revealed a wide spectrum of isoforms. p53 isoforms ΔNp53 (47 kDa) and Δ133p53 β (35 kDa), known as dominant-negative repressors of p53 function, were detected as the most predominant variants in nuclei of invasive breast carcinoma cells. The isoforms expressed also varied between individual tumors, indicating potential roles of these p53 variants in human breast cancer.
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10
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Yahalom G, Weiss D, Novikov I, Bevers TB, Radvanyi LG, Liu M, Piura B, Iacobelli S, Sandri MT, Cassano E, Allweis TM, Bitterman A, Engelman P, Vence LM, Rosenberg MM. An Antibody-based Blood Test Utilizing a Panel of Biomarkers as a New Method for Improved Breast Cancer Diagnosis. BIOMARKERS IN CANCER 2013; 5:71-80. [PMID: 24324350 PMCID: PMC3855201 DOI: 10.4137/bic.s13236] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In order to develop a new tool for diagnosis of breast cancer based on autoantibodies against a panel of biomarkers, a clinical trial including blood samples from 507 subjects was conducted. All subjects showed a breast abnormality on exam or breast imaging and final biopsy pathology of either breast cancer patients or healthy controls. Using an enzyme-linked immunosorbent assay, the samples were tested for autoantibodies against a predetermined number of biomarkers in various models that were used to determine a diagnosis, which was compared to the clinical status. Our new assay achieved a sensitivity of 95.2% [CI = 92.8–96.8%] at a fixed specificity of 49.5%. Receiver-operator characteristic curve analysis showed an area under the curve of 80.1% [CI = 72.6–87.6%]. These results suggest that a blood test which is based on models comprising several autoantibodies to specific biomarkers may be a new and novel tool for improving the diagnostic evaluation of breast cancer.
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11
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AKTAS BAHRIYE, BANKFALVI AGNES, HEUBNER MARTIN, KIMMIG RAINER, KASIMIR-BAUER SABINE. Evaluation and correlation of risk recurrence in early breast cancer assessed by Oncotype DX ®, clinicopathological markers and tumor cell dissemination in the blood and bone marrow. Mol Clin Oncol 2013; 1:1049-1054. [PMID: 24649291 PMCID: PMC3915634 DOI: 10.3892/mco.2013.174] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 07/30/2013] [Indexed: 12/20/2022] Open
Abstract
The Oncotype DX® assay is a validated genomic test that predicts the likelihood of breast cancer recurrence, patient survival within ten years of diagnosis and the benefit of chemotherapy in early-stage, node-negative, estrogen receptor-positive breast cancer. Further markers of recurrence include disseminated tumor cells (DTCs) in the bone marrow (BM) and circulating tumor cells (CTCs) in the blood, particularly stemness-like tumor cells (slCTCs). In this study, Oncotype DX, DTCs, CTCs and slCTCs were used to evaluate the risk of recurrence in 68 patients with human epidermal growth factor receptor 2-negative, early-stage breast cancer. Formalin-fixed, paraffin-embedded tissue sections were analyzed for the expression of 16 cancer genes and 5 reference genes by Oncotype DX, yielding a recurrence score (RS). G2 tumors were evaluated for urokinase-type plasminogen activator (uPA)/plasminogen activator inhibitor type 1 (PAI1) and Ki-67. Two BM aspirates were analyzed by immunocytochemistry for DTCs using the pan-cytokeratin antibody A45-B/B3. CTCs and slCTCs in the blood were detected using the AdnaTest BreastCancer, AdnaTest EMT and the AdnaTest TumorStemCell. Oncotype DX was performed in 68 cases, yielding a low RS in 30/68 patients (44%), an intermediate RS in 29/68 patients (43%) and a high RS in 9/68 patients (13%). DTCs were detected in 19/68 patients (28%), CTCs in 13/68 patients (19%) and slCTCs in 26/68 (38%) patients. Moreover, 8/68 patients (12%) with G2 tumors were positive for uPA, 6/68 (9%) for PAI1 and 21/68 (31%) for Ki-67. Ki-67, progesterone receptor (PR) and G3 tumors were significantly correlated with RS (P<0.001; P=0.006; and P=0,002, respectively), whereas no correlation was identified between DTCs, CTCs, slCTCs and RS. Ki-67 may support therapeutic decisions in cases where Oncotype DX is not feasible. Larger patient cohorts are required to estimate the additional detection of DTCs and CTCs for the determination of risk recurrence.
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Affiliation(s)
- BAHRIYE AKTAS
- Departments of Gynecology and Obstetrics, University Hospital of Essen, Essen, North Rhine-Westphalia D-45122,
Germany
| | - AGNES BANKFALVI
- Pathology, University of Duisburg-Essen, University Hospital of Essen, Essen, North Rhine-Westphalia D-45122,
Germany
| | - MARTIN HEUBNER
- Departments of Gynecology and Obstetrics, University Hospital of Essen, Essen, North Rhine-Westphalia D-45122,
Germany
| | - RAINER KIMMIG
- Departments of Gynecology and Obstetrics, University Hospital of Essen, Essen, North Rhine-Westphalia D-45122,
Germany
| | - SABINE KASIMIR-BAUER
- Departments of Gynecology and Obstetrics, University Hospital of Essen, Essen, North Rhine-Westphalia D-45122,
Germany
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12
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Inhibition of EGF/EGFR activation with naphtho[1,2-b]furan-4,5-dione blocks migration and invasion of MDA-MB-231 cells. Toxicol In Vitro 2013; 27:1-10. [DOI: 10.1016/j.tiv.2012.10.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 07/26/2012] [Accepted: 10/02/2012] [Indexed: 12/30/2022]
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13
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Bordignon V, Cordiali-Fei P, Rinaldi M, Signori E, Cottarelli A, Zonfrillo M, Ensoli F, Rasi G, Fuggetta MP. Evaluation of antigen specific recognition and cell mediated cytotoxicity by a modified lysispot assay in a rat colon carcinoma model. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2012; 31:9. [PMID: 22296726 PMCID: PMC3395825 DOI: 10.1186/1756-9966-31-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 02/01/2012] [Indexed: 12/29/2022]
Abstract
Background Antigen-specific CD8+ cytotoxic T lymphocytes represent potent effector cells of the adaptive immune response against viruses as well as tumours. Therefore assays capable at exploring the generation and function of cytotoxic T lymphocytes represent an important objective for both clinical and experimental settings. Methods Here we show a simple and reproducible assay for the evaluation of antigen-specific CD8+ cytotoxic T lymphocytes based on a LysiSpot technique for the simultaneous determination of antigen-specific IFN-γ production and assessment of tumor cytolysis. The assay was developed within an experimental model of colorectal carcinoma, induced by the colorectal tumor cell line DHD-K12 that induces tumors in BDIX rats and, in turn, elicits a tumor- specific immune response. Results Using DHD-K12 cells transfected to express Escherichia coli β-galactosidase as target cells, and by the fine setting of spot colours detection, we have developed an in vitro assay that allows the recognition of cytotoxic T lymphocytes induced in BDIX rats as well as the assessment of anti-tumour cytotoxicity. The method highlighted that in the present experimental model the tumour antigen-specific immune response was bound to killing target cells in the proportion of 55%, while 45% of activated cells were not cytotoxic but released IFN-γ. Moreover in this model by an ELISPOT assay we demonstrated the specific recognition of a nonapeptide epitope called CSH-275 constitutionally express in DHD-K12 cells. Conclusions The assay proved to be highly sensitive and specific, detecting even low frequencies of cytotoxic/activated cells and providing the evaluation of cytokine-expressing T cells as well as the extent of cytotoxicity against the target cells as independent functions. This assay may represent an important tool to be adopted in experimental settings including the development of vaccines or immune therapeutic strategies
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Affiliation(s)
- Valentina Bordignon
- Laboratory of Clinical Pathology and Microbiology, San Gallicano Dermatologic Institute, Via Elio Chianesi, 53, 00144 Rome, Italy
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14
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Abstract
Much evidence now suggests that angiotensin II has roles in normal functions of the breast that may be altered or attenuated in cancer. Both angiotensin type 1 (AT1) and type 2 (AT2) receptors are present particularly in the secretory epithelium. Additionally, all the elements of a tissue renin-angiotensin system, angiotensinogen, prorenin and angiotensin-converting enzyme (ACE), are also present and distributed in different cell types in a manner suggesting a close relationship with sites of angiotensin II activity. These findings are consistent with the concept that stromal elements and myoepithelium are instrumental in maintaining normal epithelial structure and function. In disease, this system becomes disrupted, particularly in invasive carcinoma. Both AT1 and AT2 receptors are present in tumours and may be up-regulated in some. Experimentally, angiotensin II, acting via the AT1 receptor, increases tumour cell proliferation and angiogenesis, both these are inhibited by blocking its production or function. Epidemiological evidence on the effect of expression levels of ACE or the distribution of ACE or AT1 receptor variants in many types of cancer gives indirect support to these concepts. It is possible that there is a case for the therapeutic use of high doses of ACE inhibitors and AT1 receptor blockers in breast cancer, as there may be for AT2 receptor agonists, though this awaits full investigation. Attention is drawn to the possibility of blocking specific AT1-mediated intracellular signalling pathways, for example by AT1-directed antibodies, which exploit the possibility that the extracellular N-terminus of the AT1 receptor may have previously unsuspected signalling roles.
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Affiliation(s)
- Gavin P Vinson
- School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK.
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15
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Hamrita B, Nasr HB, Hammann P, Kuhn L, Guillier CL, Chaieb A, Khairi H, Chahed K. An elongation factor-like protein (EF-Tu) elicits a humoral response in infiltrating ductal breast carcinomas: An immunoproteomics investigation. Clin Biochem 2011; 44:1097-1104. [DOI: 10.1016/j.clinbiochem.2011.06.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Revised: 05/30/2011] [Accepted: 06/01/2011] [Indexed: 10/18/2022]
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16
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Oh M, Lee JY, Shin DH, Park JH, Oian T, Kim HJ, Cho SD, Oh SH, Min YK, Kong G. The in vitro and in vivo anti-tumor effect of KO-202125, a sauristolactam derivative, as a novel epidermal growth factor receptor inhibitor in human breast cancer. Cancer Sci 2011; 102:597-604. [PMID: 21205071 PMCID: PMC11159864 DOI: 10.1111/j.1349-7006.2010.01817.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Epidermal growth factor receptor (EGFR) is one of the most promising targets for cancer therapy. Here, we show the in vitro and in vivo anticancer effects and associated mechanisms of KO-202125, one of the synthesized aristolactam analogs, as a novel EGFR inhibitor, in EGFR-overexpressing cancer cell lines. KO-202125 showed more effective growth inhibition and apoptosis induction than gefitinib, a representative EGFR inhibitor, in various EGFR-overexpressing human cancers including estrogen receptor (ER)-negative MDA-MB-231 human breast cancer cells. Epidermal growth factor receptor phosphorylation at Tyr1068 was reduced and, consequently, the association of EGFR with p85 was decreased by KO-202125 treatment in MDA-MB-231 cell lines. This led to inactivation of the PI3K/Akt pathway, and consequently suppression of activation of the Wnt pathway and enhancement of the nuclear import of p27Kip1. KO-202125 treatment in nude mice injected with MDA-MB-231 cells showed inhibition of tumor growth without toxicity. Collectively, our results showed the possibility of KO-202125 as an effective therapy agent of EGFR-overexpressing cancer cells through reduced EGFR activity and downregulation of the Akt pathway.
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Affiliation(s)
- Miyun Oh
- Department of Pathology, College of Medicine, Hanyang University, Seoul, Korea
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17
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Han JS, Cao D, Molberg KH, Sarode VR, Rao R, Sutton LM, Peng Y. Hormone receptor status rather than HER2 status is significantly associated with increased Ki-67 and p53 expression in triple-negative breast carcinomas, and high expression of Ki-67 but not p53 is significantly associated with axillary nodal metastasis in triple-negative and high-grade non-triple-negative breast carcinomas. Am J Clin Pathol 2011; 135:230-7. [PMID: 21228363 DOI: 10.1309/ajcp9dv3evzuatfv] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Triple-negative (TN) breast carcinoma is associated with a higher recurrence rate and shorter survival and lacks the benefit of specific therapy. TN tumors usually express high levels of Ki-67 and p53 that are considered prognostic markers for breast cancer. We compared Ki-67 and p53 expression between TN and high-grade non-TN invasive carcinomas in a total of 214 cases and investigated an association between their expression and axillary nodal metastasis in these tumors. Our findings demonstrate that TN tumors are associated with significantly higher expression of Ki-67 and p53 compared with non-TN tumors, which may contribute to the poorer prognosis in TN tumors. Hormone receptor negativity rather than HER2 negativity is associated with the significantly increased Ki-67 and p53 expression in TN tumors. Furthermore, a high expression level of Ki-67 but not p53 is more likely to be associated with axillary nodal metastasis in these cases.
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Affiliation(s)
- Jeong S. Han
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas
| | - Dengfeng Cao
- Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO
| | - Kyle H. Molberg
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas
| | - Venetia R. Sarode
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas
| | - Roshni Rao
- Division of Surgical Oncology, The University of Texas Southwestern Medical Center, Dallas
| | - Lisa M. Sutton
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas
| | - Yan Peng
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas
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18
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Harfouche R, Echavarria R, Rabbani SA, Arakelian A, Hussein MA, Hussain SNA. Estradiol-dependent regulation of angiopoietin expression in breast cancer cells. J Steroid Biochem Mol Biol 2011; 123:17-24. [PMID: 20937382 DOI: 10.1016/j.jsbmb.2010.09.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 08/07/2010] [Accepted: 09/10/2010] [Indexed: 12/21/2022]
Abstract
Angiopoietin-1 (Ang-1) is a ligand for Tie-2 receptors and a promoter of angiogenesis. Angiogenesis plays an important role in breast cancer, as it is one of the critical events required for tumors to grow and metastasize. In this study, we investigated the influence of estradiol (E2) on the expression of angiopoietins in breast cancer cell lines. Ang-1 mRNA and protein expressions were significantly higher in estrogen receptor-negative (ERα-) breast cancer cells than in estrogen receptor-positive (ERα+) cells. Exposure of ERα+ cells to E2 resulted in further reductions of Ang-1 levels. In mouse mammary pads inoculated with breast cancer cells, both tumor size and Ang-1 production were significantly lower in ERα+ cell-derived xenografts, as compared to those derived from ERα- cells. Reduction of circulating levels of E2 by ovariectomy eliminated this response. Overall, these results indicate that Ang-1 mRNA and protein expressions: (1) negatively correlate with the level of ERα in breast cancer cell lines; (2) are downregulated by E2 in an ERα dependent manner; and (3) positively correlate with the degree of angiogenesis in vivo. We conclude that Ang-1 is an important modulator of growth and progression of ERα- breast cancers.
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Affiliation(s)
- Rania Harfouche
- Critical Care, Respiratory Divisions, Department of Medicine, McGill University Health Centre and Meakins-Christie Laboratories, McGill University, Montréal, Québec, Canada
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19
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Fleuren EDG, O'Toole S, Millar EK, McNeil C, Lopez-Knowles E, Boulghourjian A, Croucher DR, Schramek D, Brummer T, Penninger JM, Sutherland RL, Daly RJ. Overexpression of the oncogenic signal transducer Gab2 occurs early in breast cancer development. Int J Cancer 2010; 127:1486-92. [PMID: 20087860 DOI: 10.1002/ijc.25172] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Gab2, a docking-type signaling protein with demonstrated oncogenic potential, is overexpressed in breast cancer, but its prognostic significance and role in disease evolution remain unclear. Immunohistochemical detection of Gab2 in a large cohort of primary human breast cancers of known outcome revealed that while Gab2 expression was positively correlated with increased tumor grade, it did not correlate with disease recurrence or breast cancer-related death in the total cohort or in patients stratified according to lymph node, estrogen receptor (ER) or HER2 status. Interestingly, analysis of a "progression series" that included premalignant and preinvasive breast lesions as well as samples of metastatic disease revealed that Gab2 expression was significantly enhanced in the earliest lesion examined, usual ductal hyperplasia, with a further increase detected in ductal carcinoma in situ (DCIS). Furthermore, expression was less in invasive cancers and lymph node metastases than in DCIS, but still higher than in normal breast. These findings indicate that while Gab2 expression is not prognostic in breast cancer, its role in early disease evolution warrants further analysis, as Gab2 and its effectors may provide targets for novel strategies aimed at preventing breast cancer development.
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Affiliation(s)
- Emmy D G Fleuren
- Cancer Research Program, Garvan Institute of Medical Research, Sydney, NSW, Australia
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20
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ENGELSEN INGEBORGB, AKSLEN LARSA, SALVESEN HELGAB. Biologic markers in endometrial cancer treatment. APMIS 2009; 117:693-707. [DOI: 10.1111/j.1600-0463.2009.02467.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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21
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Zeng Z, Hincapie M, Haab BB, Hanash S, Pitteri SJ, Kluck S, Hogan JM, Kennedy J, Hancock WS. The development of an integrated platform to identify breast cancer glycoproteome changes in human serum. J Chromatogr A 2009; 1217:3307-15. [PMID: 19782370 DOI: 10.1016/j.chroma.2009.09.029] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/04/2009] [Accepted: 09/11/2009] [Indexed: 01/02/2023]
Abstract
Protein glycosylation represents one of the major post-translational modifications and can have significant effects on protein function. Moreover, changes in the carbohydrate structure are increasingly being recognized as an important modification associated with cancer etiology. In this report, we describe the development of a proteomics approach to identify breast cancer related changes in either concentration and/or the carbohydrate structures of glycoprotein(s) present in blood samples. Diseased and healthy serum samples were processed by an optimized sample preparation protocol using multiple lectin affinity chromatography (M-LAC) that partitions serum proteins based on glycan characteristics. Subsequently, three separate procedures, 1D SDS-PAGE, isoelectric focusing and an antibody microarray, were applied to identify potential candidate markers for future study. The combination of these three platforms is illustrated in this report with the analysis of control and cancer glycoproteomic fractions. Firstly, a molecular weight based separation of glycoproteins by 1D SDS-PAGE was performed, followed by protein, glycoprotein staining, lectin blotting and LC-MS analysis. To refine or confirm the list of interesting glycoproteins, isoelectric focusing (targeting sialic acid changes) and an antibody microarray (used to detect neutral glycan shifts) were selected as the orthogonal methods. As a result, several glycoproteins including alpha-1B-glycoprotein, complement C3, alpha-1-antitrypsin and transferrin were identified as potential candidates for further study.
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Affiliation(s)
- Zhi Zeng
- Barnett Institute and Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA
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22
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Nicolini A, Carpi A. Immune manipulation of advanced breast cancer: an interpretative model of the relationship between immune system and tumor cell biology. Med Res Rev 2009; 29:436-71. [PMID: 19105214 DOI: 10.1002/med.20143] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review summarizes some recent clinical immunological approaches with cytokines and/or antibodies for therapy of advanced breast cancer. It considers the recent advances in genetics and molecular tumor biology related to impaired immunosurveillance involving cytokines and growth factors to explain clinical results. Evasion of the host immune attack might be induced by the following groups of mechanisms: (a) tumor dependent (genomic instability, HLA class I antigen abnormalities, upregulation of fetal type nonclassical HLA class I molecules, epitope immunodominance, apoptosis inhibition by defective death receptor signaling, apoptosis of activated T cells, tumor cannibalism and constitutive activation of signal transducer, and activator of transcription-3 (Stat 3) and nuclear factor-kappaB (NF-kappaB) signaling); (b) host dependent (CD4+CD25+ regulatory T cells (T reg), CD4+ T cells anergy, Th2 antitumor immunity diversion and myeloid suppressor cells); (c) tumor and host dependent (lack of co-stimulation molecules, immunosuppressive cytokines (vascular endothelial growth factor (VEGF), interleukin (IL)-10, prostaglandin (PG)E2, transforming growth factor (TGF)-beta)). Cytokines and growth factors are involved in virtually all three types of mechanisms. These mechanisms are integrated with the current knowledge of tumor growth and inhibited apoptosis primarily mediated by cytokines and growth factors to propose an interpretation of the relationships among tumor cells, tumor stroma, and tumor-infiltrating lymphocytes. Tumor growth, defective immunorecognition and immunosuppression are the three principal effects considered responsible for immune evasion.
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Affiliation(s)
- Andrea Nicolini
- Department of Internal Medicine, University of Pisa, Pisa, Italy.
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23
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Lim D, Jocelyn KMX, Yip GWC, Bay BH. Silencing the Metallothionein-2A gene inhibits cell cycle progression from G1- to S-phase involving ATM and cdc25A signaling in breast cancer cells. Cancer Lett 2009; 276:109-17. [DOI: 10.1016/j.canlet.2008.10.038] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Revised: 10/15/2008] [Accepted: 10/28/2008] [Indexed: 12/11/2022]
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24
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Nicolini A. Molecular markers in breast cancer: no longer a 'free' run from laboratory to the clinic. Biomark Med 2008; 2:531-4. [PMID: 20477441 DOI: 10.2217/17520363.2.6.531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Metastasio A, Bahn S. Utility of biomarkers to improve the diagnosis and treatment of schizophrenia. FUTURE NEUROLOGY 2008. [DOI: 10.2217/14796708.3.6.619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Antonio Metastasio
- Institute of Biotechnology, University of Cambridge, Tennis Court Road, CB2 1QT, UK
| | - Sabine Bahn
- Institute of Biotechnology, University of Cambridge, Tennis Court Road, CB2 1QT, UK
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26
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Rossner P, Gammon MD, Zhang YJ, Terry MB, Hibshoosh H, Memeo L, Mansukhani M, Long CM, Garbowski G, Agrawal M, Kalra TS, Gaudet MM, Teitelbaum SL, Neugut AI, Santella RM. Mutations in p53, p53 protein overexpression and breast cancer survival. J Cell Mol Med 2008; 13:3847-57. [PMID: 19602056 PMCID: PMC2832100 DOI: 10.1111/j.1582-4934.2008.00553.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
p53 is an important tumour suppressor gene that encodes p53 protein, a molecule involved in cell cycle regulation and has been inconsistently linked to breast cancer survival. Using archived tumour tissue from a population-based sample of 859 women diagnosed with breast cancer between 1996 and 1997, we determined p53 mutations in exons 5–8 and p53 protein overexpression. We examined the association of p53 mutations with overexpression and selected tumour clinical parameters. We assessed whether either p53 marker was associated with survival through 2002, adjusting for other tumour markers and prognostic factors. The prevalence of protein overexpression in the tumour was 36% (307/859) and of any p53 mutation was 15% (128/859). p53 overexpression was positively associated with the presence of any p53 mutation (odds ratio [OR]= 2.2, 95% confidence interval [CI]= 1.5–3.2), particularly missense mutations (ER = 7.0, 95% CI = 3.6–13.7). Negative oestrogen and progesterone receptor (ER/PR) status was positively associated with both p53 protein overexpression (= 2.6, 95% CI = 1.7–4.0) and p53 mutation (OR = 3.9, 95% CI = 2.4–6.5). Any p53 mutation and missense mutations, but not p53 protein overexpression, were associated with breast cancer-specific mortality (hazard ratio [HR]= 1.7, 95% CI = 1.0–2.8; HR = 2.0, 95% CI = 1.1–3.6, respectively) and all-cause mortality (HR = 1.5, 95% CI = 1.0–2.4; HR = 2.0, 95% CI = 1.2–3.4, respectively); nonsense mutations were associated only with breast cancer-specific mortality (HR = 3.0, 95% CI = 1.1–8.1). These associations however did not remain after adjusting for ER/PR status. Thus, in this population-based cohort of women with breast cancer, although p53 protein overexpression and p53 mutations were associated with each other, neither independently impacted breast cancer-specific or all-causing mortality, after considering ER/PR status.
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Affiliation(s)
- Pavel Rossner
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA.
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27
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Lu X, Gu Y, Ding Y, Song W, Mao J, Tan J, Zhao H, Han X, Sun Y. Correlation of ER, PgR, HER-2/neu, p53, and VEGF with clinical characteristics and prognosis in Chinese women with invasive breast cancer. Breast J 2008; 14:308-10. [PMID: 18476890 DOI: 10.1111/j.1524-4741.2008.00583.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Rodriguez BAT, Cheng ASL, Yan PS, Potter D, Agosto-Perez FJ, Shapiro CL, Huang THM. Epigenetic repression of the estrogen-regulated Homeobox B13 gene in breast cancer. Carcinogenesis 2008; 29:1459-65. [PMID: 18499701 DOI: 10.1093/carcin/bgn115] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Several studies have reported that a high expression ratio of HOXB13 to IL17BR predicts tumor recurrence in node-negative, estrogen receptor (ER) alpha-positive breast cancer patients treated with tamoxifen. The molecular mechanisms underlying this dysregulation of gene expression remain to be explored. Our epigenetic analysis has found that increased promoter methylation of one of these genes, HOXB13, correlate with the decreased expression of its transcript in breast cancer cell lines (P < 0.005). Transcriptional silencing of this gene can be reversed by a demethylation treatment. HOXB13 is suppressed by the activation of estrogen signaling in ERalpha-positive breast cancer cells. However, treatment with 4-hydroxytamoxifen (4-OHT), an antiestrogen, abrogates the ERalpha-mediated suppression in cancer cells. The notion that this transcriptional induction of HOXB13 occurs in vitro with simultaneous exposure to both estrogen and 4-OHT may provide a biological explanation for its aberrant expression in many node-negative patients undergoing tamoxifen therapy. Interestingly, promoter hypermethylation of HOXB13 is more frequently observed in ERalpha-positive patients with increased lymph node metastasis (P = 0.031) and large tumor sizes (>5 cm) (P = 0.008). In addition, this aberrant epigenetic event is associated with shorter disease-free survival (P = 0.029) in cancer patients. These results suggest that hypermethylation of HOXB13 is a late event of breast tumorigenesis and a poor prognostic indicator of node-positive cancer patients.
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29
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A comparison of plasma versus histologic indices of angiogenic markers in breast cancer. Appl Immunohistochem Mol Morphol 2008; 15:382-8. [PMID: 18091379 DOI: 10.1097/01.pai.0000213137.01536.ca] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Over-expression of angiogenic growth factors and their receptors, and high levels of these molecules in the blood, are a common feature of cancer although the relationships between cell expression and plasma levels are unknown. We hypothesized a significant correlation between the expression and cellular distribution of vascular endothelial growth factor (VEGF), its receptor Flt-1, and the angiopoietin receptor Tie-2 with levels of these molecules in the plasma. METHODS The tissue expression of VEGF, Flt-1, and Tie-2 were investigated by immunohistochemistry, and plasma levels assessed by enzyme-linked immunosorbent assay in 36 patients with breast cancer and 15 with benign breast disease. RESULTS Despite expected significant differences in plasma levels of the molecules (P<0.03 to <0.001), no significant differences were found in Tie-2, VEGF, and Flt-1 tissue expression between breast cancer and benign disease controls. No significant correlations were observed between plasma levels of their tissue expression. CONCLUSIONS Tissue expression of Tie-2, VEGF, and Flt-1 may not be an overly sensitive tool for assessing abnormalities of coagulation, platelet activation, and angiogenesis in human cancer. Plasma markers may not be representative of tumor activity, and may not come wholly from tumor cells. Instead these markers may be indicative of endothelial dysfunction in cancer patients.
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30
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Nicolini A, Carpi A, Ferrari P, Rossi G. Immunotherapy prolongs the serum CEA-TPA-CA15.3 lead time at the metastatic progression in endocrine-dependent breast cancer patients: a retrospective longitudinal study. Cancer Lett 2008; 263:122-9. [PMID: 18241981 DOI: 10.1016/j.canlet.2007.12.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2007] [Revised: 12/12/2007] [Accepted: 12/14/2007] [Indexed: 11/19/2022]
Abstract
In metastatic breast cancer tumour markers' increase predicts, by a few months (lead time) disease progression. In breast cancer patients with endocrine dependent metastatic disease, we reported a prolonged clinical benefit and overall survival when first line conventional antiestrogen hormone therapy was started at the lead time and also when an immunotherapy schedule was added to the same conventional hormone treatment. Thirty-two of these last patients were considered (group a). In 27 (group b) of these 32 patients who progressed during first line salvage hormone plus immunotherapy the lead time at the progression of metastatic disease during therapy was compared with that at the onset of metastases when the same patients were without treatment and with that of a control group (group c) who did not receive immunotherapy. At disease progression, CEA-TPA-CA15.3 sensitivity was 92.5% in the group b (studied patients) and 88.5% in the group c (controls). At the progression in the group b, CEA-TPA-CA15.3 lead time (m+/-sd, months) was significantly longer than in group c (12.1+/-12.9 vs 2.4+/-4.0) (P=0.000). Besides, in group b the lead time was significantly longer at the progression than at the metastatic onset (P=0.003) while in the group c the difference was near to significance (P=0.05). The CEA-TPA-CA15.3 tumour marker panel accurately predicted metastatic disease progression and immunotherapy significantly prolonged the CEA-TPA-CA15.3 lead time. This can be used for anticipating salvage treatment in these patients.
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Affiliation(s)
- A Nicolini
- Department of Internal Medicine, University of Pisa, Via Roma 67, 56126 Pisa, Italy.
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31
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Bretschneider N, Brand H, Miller N, Lowery AJ, Kerin MJ, Gannon F, Denger S. Estrogen Induces Repression of the Breast Cancer and Salivary Gland Expression Gene in an Estrogen Receptor α–Dependent Manner. Cancer Res 2008; 68:106-14. [DOI: 10.1158/0008-5472.can-07-5647] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Urquidi V, Goodison S. Genomic signatures of breast cancer metastasis. Cytogenet Genome Res 2007; 118:116-29. [PMID: 18000362 DOI: 10.1159/000108292] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Accepted: 09/28/2006] [Indexed: 01/04/2023] Open
Abstract
Despite significant advances in the treatment of primary cancer, the ability to predict the metastatic behavior of a patient's cancer, as well as to detect and eradicate such recurrences, remain major clinical challenges in oncology. While many potential molecular biomarkers have been identified and tested previously, none have greatly improved the accuracy of specimen evaluation over routine histopathological criteria and they predict individual outcomes poorly. However, the recent introduction of high-throughput microarray technology has opened new avenues in genomic investigation of cancer, and through application in tissue-based studies and appropriate animal models, has facilitated the identification of gene expression signatures that are associated with the lethal progression of breast cancer. The use of these approaches has the potential to greatly impact our knowledge of tumor biology, to provide efficient biomarkers, and enable development towards customized prognostication and therapies for the individual.
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Affiliation(s)
- V Urquidi
- Department of Medicine, University of Florida, Jacksonville, FL, USA
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33
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Nicolini A, Ferrari P, Cavazzana A, Carpi A, Berti P, Miccoli P. Conventional and new emerging prognostic factors in breast cancer: an update. Biomark Med 2007; 1:525-40. [DOI: 10.2217/17520363.1.4.525] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This article reviews the conventional clinicopathological, as well as the principal new emerging prognostic factors of breast cancer and proposes a tumor marker utility grading system for their use. In spite of the many advances in molecular biology toward better defining the biological aggressiveness of the primary malignancy, the conventional node-negative status, tumor size and grade are still the strongest predictors of relapse-free survival and/or overall survival. Microvessel count and bone-marrow micrometastases, among the more recently studied clinicopathological prognostic factors, and amplification and/or p53 mutation and S-phase fraction among the biological ones must be considered investigational, although, with enough documentation recommending their usefulness. Estrogen and/or progesterone expression, c-erbB-2 amplification and/or mutation are the prognostic factors currently included in the principal clinical guidelines. They also enable probable forecast of the response to endocrine treatment or chemotherapy. In particular, c-erbB-2 is used to define the different risk categories of node-negative operated breast cancer patients. In recent years, microarray and quantitative reverse-transcription PCR technologies have enabled the study of multiple genetic alterations and computer algorithms have been developed for visual recognition of tumors that share so-called ‘signatures’. So far, different gene-expression patterns with different prognoses have been identified but methodological problems remain to be solved prior to routine use.
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Affiliation(s)
- Andrea Nicolini
- University of Pisa, Department of Internal Medicine, Via Roma 67, 56126 Pisa, Italy
| | | | - Andrea Cavazzana
- University of Pisa, Department of Oncology, Via Roma 67, 56126 Pisa, Italy
| | - Angelo Carpi
- University of Pisa, Department of Ageing & Reproduction, Via Roma 67, 56126 Pisa, Italy
| | - Piero Berti
- University of Pisa, Department of Surgery, Via Roma 67, 56126 Pisa, Italy
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Abstract
The impact of improved treatments for the management of hormone-sensitive breast cancer extends beyond clinical responses. Thanks to appropriate literature and access to the internet, patient awareness of treatment options has grown and patients are now, in many cases, able to engage their oncologists in informed conversations regarding treatment and what to expect in terms of efficacy and safety. Indeed, patients realize that although there is no cure for metastatic disease, treatment can greatly reduce the risk of progression and in the adjuvant setting, where treatment is administered with a curative intent, current treatment options reduce the risk of relapse. The approval of letrozole throughout the breast cancer continuum has provided patients with many reassuring options. The improvement in outcome with letrozole is achieved without a detrimental effect on overall quality of life. Adverse events such as hot flushes, arthralgia, vaginal dryness, and potential osteoporosis are most significant from the patient's perspective, and it is important that caregivers pay attention to patients experiencing these events, as they can impact compliance unless effectively explained and managed. The major benefits of letrozole are to improve prospects for long-term survivorship in the adjuvant setting and to delay progression and the need for chemotherapy in the metastatic setting.
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Affiliation(s)
- Nadia Harbeck
- Frauenklinik der Technischen Universität München, Ismaninger Strasse 22, Münich, 81675 Germany
| | - Renate Haidinger
- Frauenklinik der Technischen Universität München, Ismaninger Strasse 22, Münich, 81675 Germany
- Brustkrebs Deutschland e.V., Charles-de-Gaulle-Str. 6, Münich, 81737 Germany
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35
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González-Agüero G, Gutiérrez AA, González-Espinosa D, Solano JD, Morales R, González-Arenas A, Cabrera-Muñoz E, Camacho-Arroyo I. Progesterone effects on cell growth of U373 and D54 human astrocytoma cell lines. Endocrine 2007; 32:129-35. [PMID: 18008187 DOI: 10.1007/s12020-007-9023-0] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Revised: 10/24/2007] [Accepted: 10/31/2007] [Indexed: 10/22/2022]
Abstract
Astrocytomas are the most frequent primary brain tumors and constitute a leading cause of cancer-related deaths. We studied the effects of progesterone and its antagonist, RU486, on cell growth of two human astrocytoma cell lines with different evolution grade (U373, grade III; and D54, grade IV). Progesterone receptor expression was determined by Western blot. The effects of different doses of progesterone and RU486 on cell number, cell cycle, and apoptosis were analyzed for five consecutive days. Progesterone (10 nM) significantly increased the number of D54 cells from the second day of culture, and the number of U373 cells on days 3-5. RU486 (10 muM) blocked progesterone effects in both astrocytoma cell lines. Interestingly, RU486 administered without progesterone significantly reduced the number of cells from the second day of culture in both cell lines. Progesterone increased S phase of cell cycle in U373 cells (61%, on day 5). RU486 blocked the effects of progesterone on cell cycle but administered alone did not significantly change cell cycle profile. DNA fragmentation (TUNEL) assay showed that the diminution in the number of astrocytoma cells produced by RU486 was not by apoptosis. Progesterone receptor isoforms were detected in both cell lines. Our data suggest that progesterone induces cell growth of human astrocytoma cell lines through the interaction with its nuclear receptor.
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Affiliation(s)
- Gabriela González-Agüero
- Facultad de Química, Departamento de Biología, Universidad Nacional Autónoma de México, Mexico DF, 04510, Mexico
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Abstract
In the year 2006, breast cancer was estimated to affect >200,000 American women and cause nearly 56,000 deaths. Furthermore, breast cancer is the most common cancer diagnosed and second most common cause of cancer-related deaths in women. The current treatment armamentarium for breast cancer includes chemotherapy, endocrine therapy and biological therapy. Treatment has become more individualised based on characteristics of the tumour including overexpression of the human epidermal growth factor receptor (HER)-2. Between 20 and 30% of all breast cancers overexpress HER2, which means 40,000 - 60,000 patients will have this type of cancer.Previously, overexpression of HER2 was a negative prognostic and predictive risk factor for survival; however, with the advent of trastuzumab, patients' prognosis is improving in all treatment settings. Much controversy exists in the use of trastuzumab, including (i) the sequence of adjuvant trastuzumab (concurrent with chemotherapy or sequential); (ii) the treatment duration (<1 year, 1 year or 2 years); and (iii) the treatment choice upon disease progression (whether to continue or not with trastuzumab and add another cytotoxic agent). Current trials are ongoing to help answer these questions.Furthermore, there has been interest in predicting which HER2-positive patients would require anthracycline therapy, and which could avoid anthracycline therapy and its toxicities. Novel therapeutics, such as lapatinib, an oral tyrosine kinase inhibitor, which blocks both the epidermal growth factor receptor and HER2 receptor has recently been approved by the US FDA. Whereas pertuzumab, a humanised monoclonal antibody, directed against heterodimerisation of HER2 and HER3 has entered phase II and III clinical trials.
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Affiliation(s)
- Ryan H Engel
- Division of Hematology/Oncology, Northwestern University Feinberg School of Medicine and the Robert H Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL 60611, USA
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Obermajer N, Kocbek P, Repnik U, Kuznik A, Cegnar M, Kristl J, Kos J. Immunonanoparticles − an effective tool to impair harmful proteolysis in invasive breast tumor cells. FEBS J 2007; 274:4416-27. [PMID: 17662106 DOI: 10.1111/j.1742-4658.2007.05971.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Breast cancer cells exhibit excessive proteolysis, which is responsible for extensive extracellular matrix degradation, invasion and metastasis. Besides other proteases, lysosomal cysteine protease cathepsin B has been implicated in these processes and the impairment of its intracellular activity was suggested to reduce harmful proteolysis and hence diminish progression of breast tumors. Here, we present an effective system composed of poly(D,L-lactide-coglycolide) nanoparticles, a specific anti-cytokeratin monoclonal IgG and cystatin, a potent protease inhibitor, that can neutralize the excessive intracellular proteolytic activity as well as invasive potential of breast tumor cells. The delivery system distinguishes between breast and other cells due to the monoclonal antibody specifically recognizing cytokeratines on the membrane of breast tumor cells. Bound nanoparticles are rapidly internalized by means of endocytosis releasing the inhibitor cargo within the lysosomes. This enables intracellular cathepsin B proteolytic activity to be inhibited, reducing the invasive and metastatic potential of tumor cells without affecting proteolytic functions in normal cells and processes. This approach may be applied for treatment of breast and other tumors in which intracellular proteolytic activity is a part of the process of malignant progression.
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Creaney J, van Bruggen I, Hof M, Segal A, Musk AW, de Klerk N, Horick N, Skates SJ, Robinson BWS. Combined CA125 and mesothelin levels for the diagnosis of malignant mesothelioma. Chest 2007; 132:1239-46. [PMID: 17646232 DOI: 10.1378/chest.07-0013] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Malignant mesothelioma is an aggressive, uniformly fatal tumor. Serum markers would be useful for the diagnosis of this disease. One potential marker is mesothelin. The purpose of this study was to study the mesothelin biomarker in a large patient cohort and to determine if another biomarker, CA125, improves on the sensitivity of mesothelin in the diagnosis of mesothelioma. METHODS Serum levels of mesothelin and CA125 were determined by commercially available assays in 117 samples obtained at diagnosis from patients with pleural malignant mesothelioma, 33 healthy, asbestos-exposed individuals, 53 patients with asbestos-related lung or pleural disease, and 30 patients presenting with benign pleural effusions. Cross-validated sensitivities were determined, and receiver operator characteristic curves were generated to compare the diagnostic accuracy of the biomarkers. RESULTS CA125 had a cross-validated sensitivity of 27% for mesothelioma patients at a specificity of 95% relative to asbestos-exposed individuals, or 50% relative to individuals with benign pleural effusions. Mesothelin had a cross-validated sensitivity of 52% for mesothelioma patients, at a sensitivity of 95% relative to individuals with benign lung or pleural disease. CA125 and mesothelin levels were discordant in > 50% of mesothelioma patients. Combining the data from the two biomarkers using a logistic regression model did not improve sensitivity for detecting mesothelioma above that of the mesothelin marker alone. CONCLUSION Combining mesothelin and CA125 data does not improve the sensitivity of mesothelioma diagnosis over mesothelin alone. The use of both markers potentially increases the number of patients who can be monitored.
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Affiliation(s)
- Jenette Creaney
- National Research Centre for Asbestos Related Diseases, 4th Floor, G Block, Sir Charles Gairdner Hospital, Verdun St, Nedlands, WA 6009, Australia.
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Pan J, Yang Q. Antibody-functionalized magnetic nanoparticles for the detection of carcinoembryonic antigen using a flow-injection electrochemical device. Anal Bioanal Chem 2007; 388:279-86. [PMID: 17393156 DOI: 10.1007/s00216-007-1224-0] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2006] [Revised: 02/04/2007] [Accepted: 02/16/2007] [Indexed: 10/23/2022]
Abstract
A magnetocontrolled immunosensing strategy based on flow-injection electrochemical impedance spectroscopy (EIS) was developed for the determination of carcinoembryonic antigen (CEA) in human serum. The immunosensor was fabricated by immobilizing anti-CEA on epoxysilane-modified core-shell magnetic Fe3O4/SiO2 nanoparticles. The detection principle is based on the difference between the resistances measured before and after the antigen-antibody interaction. The performance of the immunosensor and factors influencing this performance were also proposed. The resistance response depended linearly on the CEA concentration over the range 1.5-60 ng/ml, and the immunosensor gave a detection limit of 0.5 ng/ml (S/N=3). Coefficients of variance (CVs) of <9.8% were obtained for the intra- and interassay precisions. The method was successfully applied to the analysis of CEA in human serum. The recoveries obtained by spiking CEA standards into normal serum were 87-113%. The performance of the immunosensor was compared with a commercially available CEA ELISA. Satisfactory results were obtained according to a paired t-test method (t value<t (critical) at the 95% confidence level). Importantly, the proposed immobilization protocol could be further developed to immobilize other antigens or biocompounds. Figure This study introduced a magnetocontrolled electrochemical immunosensing strategy based on antibody-functionalized magnetic core-shell Fe3O4/SiO2 nanoparticles for the determination of carcinoembryonic antigen in human serum.
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Affiliation(s)
- Jin Pan
- School of River and Sea, Chongqing Jiaotong University, Chongqing, 400074, China.
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Nicolini A, Carpi A, Rossi G. Relationship of cellular immunity, cytokines and CRP with clinical course in breast cancer patients with endocrine-dependent distant metastases treated with immunotherapy. Cancer Lett 2007; 251:330-8. [PMID: 17215077 DOI: 10.1016/j.canlet.2006.12.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Revised: 11/30/2006] [Accepted: 12/01/2006] [Indexed: 11/25/2022]
Abstract
We have reported important benefits and survival with an immunotherapy schedule in patients with endocrine-dependent breast cancer and distant metastases. Here clinical outcome is updated and its correlation with new immunological data is shown. In 32 evaluated breast cancer patients with endocrine-dependent distant metastases treated with a new immunotherapy schedule (cyclic administration of beta-interferon and interleukin-2), cellular immunity, cytokines and CRP were related to the clinical course. Estimated and true 5-10 year overall survival rates from first line antiestrogen and distant metastases were higher than previously reported in a similar population. Interleukin-2 administration was followed by a significant increase in total lymphocytes, CD4+, CD8+, CD16+56+ (NK) cells, IL-6, IL-12, and CRP (from P<0.04 to P<0.000) but no change in IL-10 and TGFbeta1 during clinical benefit. During progressive disease no change was observed in the former parameters, concomitant with a significant increase in IL-10 (P=0.020) and a significant decrease in TGFbeta1 (P=0.023). These findings confirm that cellular immunity is significantly stimulated by IL-2 only during clinical benefit. Furthermore, these results demonstrate that different changes of proinflammatory cytokines, CRP and inhibiting factors are consistent with associated clinical benefit or with disease progression, respectively.
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Affiliation(s)
- Andrea Nicolini
- Department of Internal Medicine, University of Pisa, via Roma 67, 56126 Pisa, Italy.
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Abstract
Karcinom Dojke - Kliničke ImplikacijeKarcinom dojke (KD) je bolest kompleksne etiologije, prezentacije, karakteristika tumora i odgovora na terapiju. Starosna dob predstavlja najznačajniji faktor rizika, koji zajedno sa genetskom predispozicijom, trajanjem i prirodom reproduktivnog perioda žene (rana menarha-kasna menopauza, nuliparitet, kasna prva trudnoća, ne-dojenje), i delovanjem spoljašnjih faktora rizika (nutricija, fizička aktivnost, pušenje), čini KD najčešćim malignitetom u žena. Vodeći simptom jeste bezbolna, čvrsta, nepravilno ograničena masa u dojci. Dijagnoza se postavlja kombinacijom fizičkog pregleda, biopsije i neke od imidžing tehnika (mamografija, ultrazvuk, MR). Najznačajniji prognostički parametri su veličina tumora, nodalni status, histološki gradus, status hormonskih receptora. Hirurgija je i dalje osnova terapijskog pristupa, sa zračnom-, hemio-, hormono- ili ciljanom- terapijom, ili kombinacijom nekih od navedenih terapijskih modaliteta. I danas je petogodišnje preživljavanje od KD manje od 55%, što navodi na potrebu što hitnijeg uvođenja individualizovanog tretmana ove bolesti u klinič ku praksu.
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Nicolini A, Giardino R, Carpi A, Ferrari P, Anselmi L, Colosimo S, Conte M, Fini M, Giavaresi G, Berti P, Miccoli P. Metastatic breast cancer: an updating. Biomed Pharmacother 2006; 60:548-56. [PMID: 16950593 DOI: 10.1016/j.biopha.2006.07.086] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2006] [Accepted: 07/28/2006] [Indexed: 01/09/2023] Open
Abstract
UNLABELLED This article reports on recent advances on metastatic breast cancer. Detection, prognostic factors, predictors of response to therapy and therapy, with particular regard to targeted therapies, were examined. DETECTION Unlike current guidelines that yet do not routinely recommend intensive clinical-instrumental post-operative follow-up of breast cancer patients, relatively large data collected in the last decades have shown that an intensive post-operative follow-up with 'dynamic evaluation' of a suitable tumour marker panel precedes a few months as average the clinical and/or instrumental sign of a pending relapse in most relapsed patients and largely limits the use of the common instrumental examinations. PROGNOSIS AND THERAPY PREDICTORS Disease-free interval (DFI)<or=24 months, adjuvant chemotherapy, liver and distant soft tissue involvement or DFI>24 months and disease confined to bony skeleton are prognostic factors more often correlated with relatively poor or prolonged survival, respectively. Estrogen receptor (ER) expression in primary tumour and at the relapse correlates strongly with response to salvage hormone therapy and data from large trials showed that 38-59% of ER and/or PR+ post-menopausal patients had clinical benefit from first line tamoxifen or aromatase inhibitors. An inverse correlation of ER with epidermal growth factor receptor (EGFR) has been found. The co-expression of HER-2/neu and/or elevated serum HER-2/neu protein level were associated with a low rate and shorter duration of response of ER+ patients to first line hormone therapy. Accordingly, ER-EGFR- compared with ER-EGFR+ tumours are usually more responsive to endocrine therapy. High class III beta-tubulin expression or fall in insulin-like growth factor binding protein-3 (IGFBP-3) from baseline levels have been found to significantly predict resistance to chemotherapeutic agents. THERAPY Liposomes as carrier of doxorubicin (Caelix, Evacet, Myocet) is one approach to decrease the anthracycline-related cardiac toxicity. Weekly paclitaxel or docetaxel and oral formulation of vinorelbine and 5-fluorouracil (5-FU) (capecitabine) provide new effective and well tolerated options that reach greater dose intensity and cumulative dose than with the conventional schedules. As to the so called 'tailored' or targeted therapies, the more potent and highly selective third generation of aromatase inhibitors (letrozole, anastrozole, exemestane) targeting ER+ tumours by estrogen deprivation, challenge tamoxifen as current standard first line therapy in postmenopausals. One pilot study showed that stimulation of cellular immunity by the addition of beta-interferon-interleukin-2 sequence in patients on clinical benefit on first line tamoxifen significantly prolonged median overall survival (OS) and duration of response compared to that observed in similar patients only treated with tamoxifen. Trastuzumab, a humanised monoclonal antibody to extracellular domain of HER-2, plus conventional chemotherapy has become a standard of care for women with overexpressing HER-2 tumours. Bevacizumab is a recombinant humanised monoclonal antibody to vascular endothelial growth factor (VEGF) that in refractory metastatic breast cancer doubled the response rate of capecitabine although it did not affect survival. Finally, the so called 'oligometastatic' and a few stage IV diseases are conditions amenable to be rendered with no evidence of disease (NED) after local surgery and/or radiation. In both, as well as in complete responders to chemotherapy, minimal residual disease (m.r.d.) likely continues to be present. Recent data suggest that 'biological' therapy (immunomodulators and/or retinoids with or without hormone therapy), might be suitable to be successfully tested in these patients as maintenance treatment given soon after local intervention or chemotherapy.
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Affiliation(s)
- A Nicolini
- Department of Internal Medicine, University of Pisa, via Roma 67, 56126 Pisa, Italy.
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Lee SH, Kim SR, Park CH, Cho SJ, Choi YH. Loss of Heterozygosity of Chromosome 17p13 and p53 Expression in Invasive Ductal Carcinomas. J Breast Cancer 2006. [DOI: 10.4048/jbc.2006.9.4.309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Sook Hyun Lee
- Department of Surgery, Hallym University College of Medicine, Seoul, Korea
| | - Seong Rae Kim
- Department of Surgery, Hallym University College of Medicine, Seoul, Korea
| | - Chan Heun Park
- Department of Surgery, Hallym University College of Medicine, Seoul, Korea
| | - Seong Jin Cho
- Department of Pathology, Hallym University College of Medicine, Seoul, Korea
| | - Young Hee Choi
- Department of Pathology, Hallym University College of Medicine, Seoul, Korea
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