Abstract
Purpose
Triple-negative breast cancer (TNBC) patients with residual disease following neoadjuvant chemotherapy (NAC) harbor higher risk of relapse, and eventual demise compared to those who achieve pathologic complete response. Therefore, in this study, we assessed a panel of molecules involved in key pathways of drug resistance and tumor progression before and after NAC in TNBC patients, in order to clarify the underlying mechanisms.
Methods
We studied 148 TNBC Japanese patients treated with anthracycline/taxane-based NAC. KI67, Topoisomerase IIα (TopoIIα), PTEN, p53, Bcl2, vimentin, ABCG2/BCRP1, ABCB1/MDR1, and ABCC1/MRP1 were immunolocalized in surgical pathology materials before and after NAC.
Results
The status of vimentin and increasing labeling index (LI) of TopoIIα and KI67 in biopsy specimens were significantly associated with those who responded to NAC treatment. The abundance of p53 (p = 0.003), ABCC1/MRP1 (p = 0.033), ABCB1/MDR1 (p = 0.022), and a loss of PTEN (p < 0.0001) in surgery specimens following treatment were associated with pathologic parameters. TopoIIα, PTEN, and ABCC1/MRP1 status predicted pathologic response. In addition, the status of PTEN, ABCC1/MRP1, ABCB1/MDR1, Bcl2, and vimentin in surgical specimens was also significantly associated with adverse clinicopathological factors in surgery specimens, suggesting that these alterations could be responsible for tumor relapse in TNBC patients.
Conclusion
KI67, TopoIIα, PTEN, and ABCC1/MRP1 status could predict treatment response and/or eventual clinical outcomes. These results could also provide an insight into the mechanisms of drug resistance and relapse of TNBC patients receiving NAC.
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Abbreviations
- ABCB1/MDR1:
-
Multidrug resistance 1 encoded by the gene ABCB1
- ABCC1/MRP1:
-
Multidrug resistance protein 1 encoded by the gene ABCC1
- ABCG2/BCRP1:
-
Breast cancer resistance protein encoded by the gene ABCG2
- Bcl2:
-
B-cell lymphoma 2
- CI:
-
Confidence interval
- CR:
-
Complete response
- DFS:
-
Disease-free survival
- LI:
-
Labeling index
- NAC:
-
Neoadjuvant chemotherapy
- OR:
-
Odd ratio
- OS:
-
Overall survival
- p53:
-
Tumor protein 53
- pCR:
-
Pathologic complete response
- PD:
-
Progressive disease
- PR:
-
Partial response
- PTEN:
-
Phosphatase and tensin homolog
- RD:
-
Residual disease
- SD:
-
Stable disease
- TNBC:
-
Triple-negative breast cancer
- TNM:
-
Tumor, node, metastasis
- TopoIIα:
-
Topoisomerase IIα
References
Liedtke C, Mazouni C, Hess KR, André F, Tordai A, Mejia JA, Symmans WF, Gonzalez-Angulo AM, Hennessy B, Green M, Cristofanilli M, Hortobagyi GN, Pusztai L (2008) Response to neoadjuvant therapy and long-term survival in patients with triple-negative breast cancer. J Clin Oncol 26(8):1275–1281
Wu K, Yang Q, Liu Y, Wu A, Yang Z (2014) Meta-analysis on the association between pathologic complete response and triple-negative breast cancer after neoadjuvant chemotherapy. World J Surg Oncol 12:95. https://doi.org/10.1186/1477-7819-12-95
Martin M, Romero A, Cheang MCU, Lopez Garcıa-Asenjo JU, Garcıa-Saenz JA, Oliva B, Roman JM, He X, Casado A, de la Torre J, Furio J, Puente J, Caldes T, Vidart JA, Lopez-Tarruella S, Diaz-Rubio E, Perou CM (2011) Genomic predictors of response to doxorubicin versus docetaxel in primary breast cancer. Breast Cancer Res Treat 128:127–136
Wahba HA, El-Hadaad HA (2015) Current approaches in treatment of triple-negative breast cancer. Cancer Biol Med 12(2):106–116
Székely B, Silber AL, Pusztai L (2017) New therapeutic strategies for triple-negative breast cancer. Oncology 31(2):130–137
Zhang LH, Yang AJ, Wang M, Liu W, Wang CY, Xie XF, Chen X, Dong JF, Li M (2016) Enhanced autophagy reveals vulnerability of P-gp mediated epirubicin resistance in triple negative breast cancer cells. Apoptosis 21(4):473–488
Yamada A, Ishikawa T, Ota I, Kimura M, Shimizu D, Tanabe M, Chishima T, Sasaki T, Ichikawa Y, Morita S, Yoshiura K, Takabe K, Endo I (2013) High expression of ATP-binding cassette transporter ABCC11 in breast tumors is associated with aggressive subtypes and low disease-free survival. Breast Cancer Res Treat 137(3):773–782
Xu H, Eirew P, Mullaly SC, Aparicio S (2014) The omics of triple-negative breast cancers. Clin Chem 60(1):122–133
Florea AM, Busselberg D (2013) Breast cancer and possible mechanisms of therapy resistance. J Local Glob Health Sci. https://doi.org/10.5339/jlghs
O’Reilly EA, Gubbins L, Sharma S, Tully R, Ho Zhing Guang M, Weiner-Gorzel W, McCaffrey J, Harrison M, Furlong F, Kell M, McCanna A (2015) The fate of chemoresistance in triple negative breast cancer (TNBC). BBA Clin 3:257–275
Bouchalova K, Cizkova M, Cwiertka K, Trojanec R, Hajduch M (2009) Triple negative breast cancer-current status and prospective targeted treatment based on HER1 (EGFR), TOP2A and C-MYC gene assessment. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 153(1):13–17
Balko JM, Giltnane JM, Wang K, Schwarz LJ (2014) Molecular profiling of the residual disease of triple-negative breast cancers after neoadjuvant chemotherapy identifies actionable therapeutic targets. Cancer Discov 4(2):232–245
Lonning PE, Knappskog S (2013) Mapping genetic alterations causing chemoresistance in cancer: identifying the roads by tracking the drivers. Oncogene 32(46):5315–5330
McShane LM, Altman DG, Sauerbrei W, Taube SE, Gion M, Clark GM (2005) Reporting recommendations for tumour MARKer prognostic studies (REMARK). Br J Cancer 93(4):387–391
Davis SL, Eckhardt SG, Tentler JJ, Diamond JR (2014) Triple-negative breast cancer: bridging the gap from cancer genomics to predictive biomarkers. Ther Adv Med Oncol 6(3):88–100
Lehmann BD, Pietenpol JA (2014) Identification and use of biomarkers in treatment strategies for triple negative breast cancer subtypes. J Pathol 232(2):142–150
Guestini F, McNamara KM, Ishida T, Sasano H (2016) Triple negative breast cancer chemosensitivity and chemoresistance: current advances in biomarkers identification. Exp Opin Ther Targets 20(6):705–720
Yadav BS, Chanana P, Jhamb S (2015) Biomarkers in triple negative breast cancer: a review. World J Clin Oncol 6(6):252–263
Fleisher B, Clarke C, Ait-Oudhia S (2016) Current advances in biomarkers for targeted therapy in triple-negative breast cancer. Breast Cancer 8:183–197
Longley DB, Johnston PG (2005) Molecular mechanisms of drug resistance. J Pathol 205(2):275–292
Rivera E, Gomez H (2010) Chemotherapy resistance in metastatic breast cancer: the evolving role of ixabepilone. Breast Cancer Res 12(2):S2
Ossovskaya V, Wang Y, Budoff A, Xu Q, Lituev A, Potapova O, Vansant G, Monforte J, Daraselia N (2011) Exploring molecular pathways of triple-negative breast cancer. Genes Cancer 2(9):870–879
Lips EH, Michaut M, Hoogstraat M, Mulder L, Besselink NJM, Koudijs MJ, Cuppen E, Voest EE, Bernards R, Nederlof PM, Wesseling J, Rodenhuis S, Wessels LFA (2015) Next generation sequencing of triple negative breast cancer to find predictors for chemotherapy response. Breast Cancer Res 17(1):134
Chen Y-H, Hancock BA, Solzak JP, Brinza D, Scafe C, Miller KD, Radovich M (2017) Next-generation sequencing of circulating tumor DNA to predict recurrence in triple-negative breast cancer patients with residual disease after neoadjuvant chemotherapy. NPJ Breast Cancer 3(1):24
Santuario-Facio SK, Cardona-Huerta S, Perez-Paramo YX, Trevino V, Hernandez-Cabrera F, Rojas-Martinez A, Uscanga-Perales G, Martinez-Rodriguez JL, Martinez-Jacobo L, Padilla-Rivas G et al (2017) A new gene expression signature for triple-negative breast cancer using frozen fresh tissue before neoadjuvant chemotherapy. Mol Med 23:101–111
Wein L, Loi S (2017) Mechanisms of resistance of chemotherapy in early-stage triple negative breast cancer (TNBC). Breast 34(Suppl 1):S27–S30
Bareche Y, Venet D, Ignatiadis M, Aftimos P, Piccart M, Rothe F, Sotiriou C (2018) Unravelling triple-negative breast cancer molecular heterogeneity using an integrative multiomic analysis. Ann Oncol 29:895–902
Kim T, Han W, Kim MK, Lee JW, Kim J, Ahn SK, Lee H-B, Moon H-G, Lee K-H, Kim T-Y et al (2015) Predictive significance of p53, Ki-67, and Bcl-2 expression for pathologic complete response after neoadjuvant chemotherapy for triple-negative breast cancer. J Breast Cancer 18(1):16–21
Wang W, Wu J, Zhang P, Fei X, Zong Y, Chen X, Huang O, He J-R, Chen W, Li Y et al (2016) Prognostic and predictive value of Ki-67 in triple-negative breast cancer. Oncotarget 7(21):31079–31087
Elnemr GM, El-Rashidy AH, Osman AH, Issa LF, Abbas OA, Al-Zahrani AS, El-Seman SM, Mohammed AA, Hassan AA (2016) Response of triple negative breast cancer to neoadjuvant chemotherapy: correlation between Ki-67 expression and pathological response. Asian Pac J Cancer Prev 17(2):807–813
Nakashoji A, Matsui A, Nagayama A, Iwata Y, Sasahara M, Murata Y (2017) Clinical predictors of pathological complete response to neoadjuvant chemotherapy in triple-negative breast cancer. Oncol Lett 14(4):4135–4141
Nogi H, Uchida KEN, Kamio M, Kato K, Toriumi Y, Akiba T, Morikawa T, Suzuki M, Kobayashi T, Takeyama H (2016) Triple-negative breast cancer exhibits a favorable response to neoadjuvant chemotherapy independent of the expression of Topoisomerase IIα. Mol Clin Oncol 4(3):383–389
Li XY, Mu L, Feng J (2016) Topoisomerase IIα and BRCA1 expression as predictive factors for anthracycline-based adjuvant chemotherapy response and prognosis in triple-negative breast cancers. Int J Clin Exp Pathol 9(9):9249–9258
Ignatiadis M, Singhal SK, Desmedt C, Haibe-Kains B, Criscitiello C, Andre F, Loi S, Piccart M, Michiels S, Sotiriou C (2012) Gene modules and response to neoadjuvant chemotherapy in breast cancer subtypes: a pooled analysis. J Clin Oncol 30(16):1996–2004
Duffy MJ, Synnott NC, Crown J (2018) Mutant p53 in breast cancer: potential as a therapeutic target and biomarker. Breast Cancer Res Treat 170:213. https://doi.org/10.1007/s10549-018-4753-7
Abdel-Fatah TM, Perry C, Dickinson P, Ball G, Moseley P, Madhusudan S, Ellis IO, Chan SY (2013) Bcl2 is an independent prognostic marker of triple negative breast cancer (TNBC) and predicts response to anthracycline combination (ATC) chemotherapy (CT) in adjuvant and neoadjuvant settings. Ann Oncol 24(11):2801–2807
Karihtala P, Auvinen P, Kauppila S, Haapasaari KM, Jukkola-Vuorinen A, Soini Y (2013) Vimentin, zeb1 and Sip1 are up-regulated in triple-negative and basal-like breast cancers: association with an aggressive tumour phenotype. Breast Cancer Res Treat 138(1):81–90
Yamashita N, Tokunaga E, Kitao H, Hisamatsu Y, Taketani K, Akiyoshi S, Okada S, Aishima S, Morita M, Maehara Y (2013) Vimentin as a poor prognostic factor for triple-negative breast cancer. J Cancer Res Clin Oncol 139(5):739–746
Wang L, Jiang Z, Sui M, Shen J, Xu C, Fan W (2009) The potential biomarkers in predicting pathologic response of breast cancer to three different chemotherapy regimens: a case control study. BMC Cancer 9:226–226
Kovalev AA, Tsvetaeva DA, Grudinskaja TV (2013) Role of ABC-cassette transporters (MDR1, MRP1, BCRP) in the development of primary and acquired multiple drug resistance in patients with early and metastatic breast cancer. Exp Oncol 35(4):287–290
Delou JMdA, Vignal GM, Índio-do-Brasil V, Accioly MTdS, da Silva TSL, Piranda DN, Sobral-Leite M, de Carvalho MA, Capella MAM, Vianna-Jorge R (2017) Loss of constitutive ABCB1 expression in breast cancer associated with worse prognosis. Breast Cancer 9:415–428
Eisenhauera EA, Therasseb P, Bogaertsc J, Schwartzd LH, Sargente D, Fordf R, Danceyg J, Arbuckh S, Gwytheri S, Mooneyg M, Rubinsteing L, Shankarg L, Doddg L, Kaplanj R, Lacombec D, Verweijk J (2009) New response evaluation criteria in solid tumours: revised RECIST guideline (version 1.1). Eur J Cancer 45:228–247
Leslie EM, Deeley RG, Cole SP (2005) Multidrug resistance proteins: role of P-glycoprotein, MRP1, MRP2, and BCRP (ABCG2) in tissue defense. Toxicol Appl Pharmacol 204(3):216–237
Kim B, Fatayer H, Hanby AM, Horgan K, Perry SL, Valleley EM, Verghese ET, Williams BJ, Thorne JL, Hughes TA (2013) Neoadjuvant chemotherapy induces expression levels of breast cancer resistance protein that predict disease-free survival in breast cancer. PLoS ONE 8(5):e62766
Collina F, Di Bonito M, Li Bergolis V, De Laurentiis M, Vitagliano C, Cerrone M, Nuzzo F, Cantile M, Botti G (2015) Prognostic value of cancer stem cells markers in triple-negative breast cancer. Biomed Res Int 2015:158682
Chen Z-S, Tiwari AK (2011) Multidrug resistance proteins (MRPs/ABCCs) in cancer chemotherapy and genetic diseases. FEBS J 278(18):3226–3245
Kathawala RJ, Gupta P, Ashby CR, Chen ZS (2015) The modulation of ABC transporter-mediated multidrug resistance in cancer: a review of the past decade. Drug Resist Updates 18:1–17
Zhang L-h, Yang A-j, Wang M, Liu W, Wang C-y, Xie X-f, Chen X, Dong J-f, Li M (2016) Enhanced autophagy reveals vulnerability of P-gp mediated epirubicin resistance in triple negative breast cancer cells. Apoptosis 21(4):473–488
Lehmann BD, Jovanovic B, Chen X, Estrada MV, Johnson KN, Shyr Y, Moses HL, Sanders ME, Pietenpol JA (2016) Refinement of triple-negative breast cancer molecular subtypes: implications for neoadjuvant chemotherapy selection. PLoS ONE 11(6):e0157368
Jang MH, Kim HJ, Kim EJ, Chung YR, Park SY (2015) Expression of epithelial-mesenchymal transition-related markers in triple-negative breast cancer: ZEB1 as a potential biomarker for poor clinical outcome. Hum Pathol 46(9):1267–1274
Tawfik K, Kimler BF, Davis MK, Fan F, Tawfik O (2012) Prognostic significance of Bcl-2 in invasive mammary carcinomas: a comparative clinicopathologic study between “triple-negative” and non-“triple-negative” tumors. Hum Pathol 43(1):23–30
Hwang KT, Woo JW, Shin HC, Kim HS, Ahn SK, Moon HG, Han W, Park IA, Noh DY (2012) Prognostic influence of BCL2 expression in breast cancer. Int J Cancer 131(7):E1109–E1119
Vargas-Roig LM, Cuello-Carrión FD, Fernández-Escobar N, Daguerre P, Leuzzi M, Ibarra J, Gago FE, Nadin SB, Ciocca DR (2008) Prognostic value of Bcl-2 in breast cancer patients treated with neoadjuvant anthracycline based chemotherapy. Mol Oncol 2(1):102–111
Chen W, Dong J, Haiech J, Kilhoffer MC, Zeniou M (2016) Cancer stem cell quiescence and plasticity as major challenges in cancer therapy. Stem Cells Int 2016. https://doi.org/10.1155/2016/1740936
Guestini F, McNamara KM, Sasano H (2017) The use of chemosensitizers to enhance the response to conventional therapy in triple-negative breast cancer patients. Breast Cancer Manag 6(4):127–131
Hu Y, Yague E, Zhao J, Wang L, Bai J, Yang Q, Pan T, Zhao H, Liu J, Zhang J (2018) Sabutoclax, pan-active BCL-2 protein family antagonist, overcomes drug resistance and eliminates cancer stem cells in breast cancer. Cancer Lett 423:47–59
Yndestad S, Austreid E, Knappskog S, Chrisanthar R, Lilleng PK, Lonning PE, Eikesdal HP (2017) High PTEN gene expression is a negative prognostic marker in human primary breast cancers with preserved p53 function. Breast Cancer Res Treat 163(1):177–190
Brandmaier A, Hou SQ, Shen WH (2017) Cell cycle control by PTEN. J Mol Biol 429(15):2265–2277
Wang X, Jiang X (2008) Post-translational regulation of PTEN. Oncogene 27(41):5454–5463
Bermúdez Brito M, Goulielmaki E, Papakonstanti EA (2015) Focus on PTEN regulation. Front Oncol 5:166
Iqbal J, Thike AA, Cheok PY, Tse GM, Tan PH (2012) Insulin growth factor receptor-1 expression and loss of PTEN protein predict early recurrence in triple-negative breast cancer. Histopathology 61(4):652–659
Inanc M, Ozkan M, Karaca H, Berk V, Bozkurt O, Duran AO, Ozaslan E, Akgun H, Tekelioglu F, Elmali F (2014) Cytokeratin 5/6, c-Met expressions, and PTEN loss prognostic indicators in triple-negative breast cancer. Med Oncol 31(1):801
Beg S, Siraj AK, Prabhakaran S, Jehan Z, Ajarim D, Al-Dayel F, Tulbah A, Al-Kuraya KS (2015) Loss of PTEN expression is associated with aggressive behavior and poor prognosis in Middle Eastern triple-negative breast cancer. Breast Cancer Res Treat 151(3):541–553
Li S, Shen Y, Wang M, Yang J, Lv M, Li P, Chen Z, Yang J (2017) Loss of PTEN expression in breast cancer: association with clinicopathological characteristics and prognosis. Oncotarget 8(19):32043–32054
Fouque A, Jean M, Weghe PV, Legembre P (2016) Review of PI3K/mTOR inhibitors entering clinical trials to treat triple negative breast cancers. Recent Pat Anticancer Drug Discov 11(3):283–296
Costa RLB, Han HS, Gradishar WJ (2018) Targeting the PI3K/AKT/mTOR pathway in triple-negative breast cancer: a review. Breast Cancer Res Treat. https://doi.org/10.1007/s10549-018-4697-y
Massihnia D, Galvano A, Fanale D, Perez A, Castiglia M, Incorvaia L, Listi A, Rizzo S, Cicero G, Bazan V, Castorina S, Russo A (2016) Triple negative breast cancer: shedding light onto the role of PI3K/Akt/mTOR pathway. Oncotarget 7(37):60712–60722
Kang X, Song C, Du X, Zhang C, Liu Y, Liang L, He J, Lamb K, Shen WH, Yin Y (2015) PTEN stabilizes TOP2A and regulates the DNA decatenation. Sci Rep 5:17873
Yuan L, Lv Y, Li H, Gao H, Song S, Zhang Y, Xing G, Kong X, Wang L, Li Y, Zhou T, Gao D, Xiao ZX, Yin Y, Wei W, He F, Zhang L (2015) Deubiquitylase OTUD3 regulates PTEN stability and suppresses tumorigenesis. Nat Cell Biol 17:1169
Fielding AB, Concannon M, Darling S, Rusilowicz-Jones EV, Sacco JJ, Prior IA, Clague MJ, Urbé S, Coulson JM (2018) The deubiquitylase USP15 regulates Topoisomerase II alpha to maintain genome integrity. Oncogene. https://doi.org/10.1038/s41388-017-0092-0
Millis SZ, Gatalica Z, Winkler J, Vranic S, Kimbrough J, Reddy S, O’Shaughnessy JA (2015) Predictive biomarker profiling of > 6000 breast cancer patients shows heterogeneity in TNBC, with treatment implications. Clin Breast Cancer 15(6):473–481
Zeichner SB, Terawaki H, Gogineni K (2016) A review of systemic treatment in metastatic triple-negative breast cancer. Breast Cancer 10:25–36
Keam B, Im SA, Lee KH, Han SW, Oh DY, Kim JH, Lee SH, Han W, Kim DW, Kim TY, Park IA, Noh DY, Heo DS, Bang YJ (2011) Ki-67 can be used for further classification of triple negative breast cancer into two subtypes with different response and prognosis. Breast Cancer Res 13(2):R22
Li XR, Liu M, Zhang YJ, Wang JD, Zheng YQ, Li J, Ma B, Song X (2011) CK5/6, EGFR, Ki-67, cyclin D1, and nm23-H1 protein expressions as predictors of pathological complete response to neoadjuvant chemotherapy in triple-negative breast cancer patients. Med Oncol 28(Suppl 1):S129–S134
Tan QX, Qin QH, Yang WP, Mo QG, Wei CY (2014) Prognostic value of Ki67 expression in HR-negative breast cancer before and after neoadjuvant chemotherapy. Int J Clin Exp Pathol 7(10):6862–6870
Tian M, Zhong Y, Zhou F, Xie C, Zhou Y, Liao Z (2015) Effect of neoadjuvant chemotherapy in patients with triple-negative breast cancer: a meta-analysis. Oncol Lett 9(6):2825–2832
Pan Y, Yuan Y, Liu G, Wei Y (2017) P53 and Ki-67 as prognostic markers in triple-negative breast cancer patients. PLoS ONE 12(2):e0172324
Wang J, Xu B, Yuan P, Zhang P, Li Q, Ma F, Fan Y (2012) TOP2A amplification in breast cancer is a predictive marker of anthracycline-based neoadjuvant chemotherapy efficacy. Breast Cancer Res Treat 135(2):531–537
Bravaccini S, Rocca A, Bronte G (2018) Is Ki67 still a powerful ally in predicting the clinical benefit of anthracyclines for the adjuvant treatment of early breast cancer? Breast Cancer Res Treat 168:767–768
Rossi L, Laas E, Mallon P, Vincent-Salomon A, Guinebretiere JM, Lerebours F, Rouzier R, Pierga JY, Reyal F (2015) Prognostic impact of discrepant Ki67 and mitotic index on hormone receptor-positive, HER2-negative breast carcinoma. Br J Cancer 113:996
Mueller RE, Parkes RK, Andrulis I, O’Malley FP (2004) Amplification of the TOP2A gene does not predict high levels of Topoisomerase II alpha protein in human breast tumor samples. Genes Chromosom Cancer 39:288–297
Khan F, Esnakula A, Ricks-Santi LJ, Zafar R, Kanaan Y, Naab T (2018) Loss of PTEN in high grade advanced stage triple negative breast ductal cancers in African American women. Pathology 214(5):673–678
Dillon LM, Miller TW (2014) Therapeutic targeting of cancers with loss of PTEN function. Curr Drug Targets 15(1):65–79
Darb-Esfahani S, Denkert C, Stenzinger A, Salat C, Sinn B, Schem C, Endris V, Klare P, Schmitt W, Blohmer J-U et al (2016) Role of TP53 mutations in triple negative and HER2-positive breast cancer treated with neoadjuvant anthracycline/taxane-based chemotherapy. Oncotarget 7(42):67686–67698
Yamashita H, Toyama T, Nishio M, Ando Y, Hamaguchi M, Zhang Z, Kobayashi S, Fujii Y, Iwase H (2006) p53 protein accumulation predicts resistance to endocrine therapy and decreased post-relapse survival in metastatic breast cancer. Breast Cancer Res 8(4):R48
Varga Z, Cassoly E, Li Q, Oehlschlegel C, Tapia C, Lehr HA, Klingbiel D, Thürlimann B, Ruhstaller T (2015) Standardization for Ki-67 assessment in moderately differentiated breast cancer. A retrospective analysis of the SAKK 28/12 study. PLoS ONE 10(4):e0123435
Biesaga B, Niemiec J, Ziobro M (2014) BCL-2, Topoisomerase IIα, microvessel density and prognosis of early advanced breast cancer patients after adjuvant anthracycline-based chemotherapy. J Cancer Res Clin Oncol 140:2009–2019
Gonzalez-Angulo AM, Ferrer-Lozano J, Stemke-Hale K, Sahin A, Liu S, Barrera JA, Burgues O, Lluch AM, Chen H, Hortobagyi GN, Mills GB, Meric-Bernstam F (2011) PI3K pathway mutations and PTEN levels in primary and metastatic breast cancer. Mol Cancer Ther 10(6):1093–1101
Britton KM, Eyre R, Harvey IJ, Stemke-Hale K, Browell D, Lennard TWJ, Meeson AP (2012) Breast cancer, side population cells and ABCG2 expression. Cancer Lett. https://doi.org/10.1016/j.canlet.2012.1003.1041
Soini Y, Jarvinen K, Kaarteenaho Wiik R, Kinnula V (2001) The expression of P-glycoprotein and multidrug resistance proteins 1 and 2 (MRP1 and MRP2) in human malignant mesothelioma. Ann Oncol 12:1239–1245
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The author Fouzia Guestini work was supported by the Japanese Government Ministry of Education, Culture, Sports, Science, and Technology (MEXT). The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
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Guestini, F., Ono, K., Miyashita, M. et al. Impact of Topoisomerase IIα, PTEN, ABCC1/MRP1, and KI67 on triple-negative breast cancer patients treated with neoadjuvant chemotherapy. Breast Cancer Res Treat 173, 275–288 (2019). https://doi.org/10.1007/s10549-018-4985-6
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DOI: https://doi.org/10.1007/s10549-018-4985-6