Strontium-89 plus zoledronic acid versus zoledronic acid for patients with painful bone metastatic breast cancer.

INTRODUCTION: ß-ray strontium-89 (Sr-89) intra-irradiation therapy has been approved and clinically used to reduce bone metastasis pain not alleviated by bone-modifying agents, external radiation, and analgesic agents. We examined the efficacy of zoledronic acid (ZOL) and Sr-89 combination therapy compared with ZOL alone in breast cancer patients with bone metastases. MATERIALS AND METHODS: A randomized controlled trial was conducted on breast cancer patients with bone metastasis to compare the efficacy between ZOL monotherapy and ZOL plus Sr-89 combination therapy. The primary endpoints were changes in urinary NTX levels at 13 weeks and brief pain inventory scores. The secondary endpoints were analgesic drug usages, response rates, changes in bone metabolism markers, quality of life, and adverse event rates. RESULTS: Thirty of the planned 60 cases were randomly assigned to ZOL alone or ZOL + Sr-89. There were no significant differences in the changes in urinary NTX levels between the 2 groups (P = 0.365). There was no consistent difference in the pain score changes between the 2 groups. Sr-89 addition to ZOL slightly reduced the white blood cell and platelet counts. However, all adverse events were Grade 1. Safety and analgesic drug dose reduction were more evident in ZOL + Sr-89. CONCLUSION: This trial showed the lack of benefits from Sr-89 addition to ZOL for breast cancer patients with painful bone metastases. However, safety and analgesic drug dose reduction were more evident in ZOL + Sr-89, indicating its potential for pain control. Sr-89 therapy is safe, thus more effective radiopharmaceuticals are anticipated.

Prediction of pathological response to neoadjuvant chemotherapy in breast cancer patients by imaging.

BACKGROUND: Diagnostic imaging is important for predicting the pathological response to chemotherapy during neoadjuvant chemotherapy (NAC) and for considering the surgical management with appropriate resection after NAC. This study was performed to examine the accuracy of the present radiological imaging for predicting the pathological complete response (pCR). METHODS: From 188 patients in our previous JONIE1 Study, a randomized controlled trial comparing chemotherapy with and without zoledronic acid for patients with human epidermal growth factor receptor 2-negative breast cancer, we evaluated 122 patients whose tumor size was examined by magnetic resonance imaging or ultrasound at three points: before NAC; after administering fluorouracil, epirubicin, and cyclophosphamide; and after NAC. The maximum tumor diameter was evaluated by magnetic resonance imaging or ultrasound. Tumor reduction ratios were calculated at the same three points. The association between the radiological clinical response and the pCR was examined. RESULTS: Among the 122 patients evaluated, there were 98 and 24 patients with luminal (Lum) and triple-negative (TN) subtypes, respectively. There were no patients who showed tumor progression after treatment. The radiological size of the tumors was finally reduced by an average of 58.4%. Clinical complete response and pCR were achieved in 22 (18.0%) and 15 (12.3%) patients, respectively. In the overall population (n = 122), the accuracy, sensitivity, and specificity for predicting pCR were 86.1%, 88.8%, and 66.7%, respectively. The negative predictive value and false-negative rate were 45.5% and 11.2%, respectively. According to subtypes, the accuracies were 83.7% and 95.8% in Lum and TN, respectively. Negative predictive value and false-negative rate were markedly different between the Lum (29.4% and 13.5%) and TN subtypes (100% and 0%), respectively. CONCLUSIONS: This randomized clinical trial demonstrated that NAC was safe for operable breast cancer patients with appropriate radiological monitoring. Radiological evaluation after NAC may be a reliable method for predicting pathological response in the TN subtype, but not in the Lum subtype.

Survival outcomes of neoadjuvant chemotherapy with zoledronic acid for HER2-negative breast cancer.

BACKGROUND: A randomized phase 2 trial in women with HER2-negative breast cancer has shown that adding zoledronic acid (ZOL) to neoadjuvant chemotherapy (CT) has potential anticancer benefits in postmenopausal and triple-negative (TN) breast cancer patients. We report the data for the secondary end point of disease-free survival (DFS). METHODS: Patients were randomly assigned to receive CT or CT + ZOL (CT-Z). All patients received four cycles of FEC100 followed by 12 cycles of paclitaxel weekly. ZOL (4 mg) was administered 3-4 times weekly for 7 wk to the CT-Z group patients. The primary end point was pathologic complete response (pCR). The secondary end points were the clinical response rates, rate of breast-conserving surgery, safety, and DFS. RESULTS: Of the 188 patients enrolled, 95 were assigned to the CT group and 93 to the CT-Z group. DFS and overall survival were analyzed in 92 and 88 patients with the mean times of 5.15 y and 5.38 y, respectively. The 3-y DFS rate was 84.6% in the CT group and 90.8% in the CT-Z group (P = 0.188). The particular benefit from ZOL for the neoadjuvant CT seen as improvement of the pCR rate was indicated in the 3-y DFS period for TN cancer cases (CT versus CT-Z: 70.6% versus 94.1%) but not for postmenopausal cases. CONCLUSIONS: ZOL did not improve DFS when combined with CT. However, the improvement of the pCR rate translated to survival outcomes in TN breast cancer. The short-term application of ZOL may not be sufficient to improve the outcome in postmenopausal patients.

High levels of DJ-1 protein and isoelectric point 6.3 isoform in sera of breast cancer patients.

In patients with cancer and Parkinson's disease, the DJ-1 protein may be secreted into the serum during the impaired response of the underlying cell-protective mechanisms. In order to determine the clinical significance of DJ-1 protein in the sera of breast cancer patients, we examined blood samples from a breast cancer group (n = 180) and a non-cancerous control group (n = 300). Higher levels of DJ-1 were detected in the breast cancer group (mean level, 42.7 ng/mL) than the control group (28.3 ng/mL) by ELISA (P = 0.019). Higher DJ-1 levels were significantly associated with advanced clinical grade, according to the TNM classification, negative hormone receptor status, and high Ki-67 labeling index, of biopsied materials; samples showed low DJ-1 protein expression despite upregulated DJ-1 mRNA. DJ-1 isoforms could be detected clearly in 17 blood samples (from 11 breast cancer patients, and 6 non-cancerous controls) by 2-D gel electrophoresis and immunoblot analysis. The isoform at the pI of 6.3 showed the highest intensity in all 11 cancer cases. Conversely, in the 6 non-cancerous cases, isoforms other than the pI 6.3 isoform were highly expressed, and there was a significant difference in the isoform pattern between breast cancer cases and controls (P = 0.00025). These data indicate that high levels of DJ-1, probably of isoform at pI 6.3, is a candidate serum marker of breast cancer.

Expression of CD24 is associated with HER2 expression and supports HER2-Akt signaling in HER2-positive breast cancer cells.

Human epidermal growth factor receptor 2 (HER2)-positive breast cancer is treated with HER2-targeted agents, such as trastuzumab and lapatinib, that suppress signaling by phosphatidylinositol 3-kinase (PI3K)-Akt and MAPK pathways. However, resistance to HER2-targeted therapy remains a major clinical problem. Overexpression of CD24 has been detected in many cancers and is associated with a poor prognosis in women with breast cancer. HER2-positive breast tumors are predominantly positive for CD24, suggesting that the expression of the two molecules is related. To investigate the relation between HER2 and CD24, we overexpressed HER2 in breast cancer cells that were triple-negative for the estrogen receptor, progesterone receptor and HER2. We found that expression of CD24 was increased by stable overexpression of HER2. Flow cytometry thus revealed that the percentage of CD24-positive cells was markedly higher in the HER2-positive fraction than in the HER2-negative fraction. Knockdown of CD24 in breast cancer cells positive for endogenous HER2 downregulated HER2 expression, whereas knockdown of HER2 did not affect the expression of CD24. Knockdown of CD24 also suppressed the phosphorylation of Akt, which functions downstream of HER2 and PI3K to promote cell survival. Moreover, knockdown of CD24 increased the sensitivity of HER2-positive breast cancer cells to lapatinib treatment. Our results thus indicate that CD24 supports both the expression of HER2 and the consequent activation of PI3K-Akt signaling. Furthermore, CD24 may contribute to resistance to HER2-targeted therapy and, therefore, is itself a potential therapeutic target in HER2-positive breast cancer.

Preferences for pharmacist counselling in patients with breast cancer: a discrete choice experiment.

With the shift of a large proportion of cancer chemotherapy recipients to ambulatory care, the role of hospital pharmacists has changed, and their provision of information is essential care for cancer patients. There is little research on pharmacist-patient relations, particularly about pharmacist counselling, in Japan. To meet patients' needs, pharmacist counselling should be optimized. Here, breast cancer patients' preferences for pharmacist counselling were assessed using a discrete choice experiment. Bayesian nonlinear optimal methodology was employed to obtain six attributes (attitude of pharmacist, quality of information, explanation of side effects, frequency of pharmacist counselling before starting chemotherapy, cost of pharmacist counselling, and follow-up with the pharmacist after starting chemotherapy) of two to three levels each. The attributes and levels were used to create 12 hypothetical scenarios that were divided into two questionnaires of six choice sets each. Two hundred eighty participants were randomly assigned to complete one of these questionnaires (blocks). Attributes were analyzed by conditional logit model to determine significant predictors of patient preferences. The responses of 278 patients to 1667 scenarios were analyzed. Attitude of pharmacist, quality of information, cost of pharmacist counselling, and follow-up with the pharmacist after starting chemotherapy were significant predictors of patient preferences, with quality of information receiving the highest priority. Thus patients receiving pharmacist counselling before starting chemotherapy prefer to interact with a pharmacist with a friendly, interested attitude who provides individualized information. Further research is needed to elucidate the information that Japanese patients consider most important and to enhance pharmacist-patient communication.

Characteristics of the early stages of intravenous bisphosphonate-related osteonecrosis of the jaw in patients with breast cancer.

OBJECTIVE: The clinical features of the early stages of bisphosphonate-related osteonecrosis of the jaw (BRONJ) in patients with breast cancer remain unclear. A retrospective cohort study was conducted of patients with breast cancer who received intravenous bisphosphonate (BP) treatment in a single center in order to clarify the status of the early stages of BRONJ. MATERIALS AND METHODS: A BRONJ oral monitoring program was established in 247 breast cancer patients given intravenous BP treatment at the institution. The differences in age, BP treatment period, number of remaining teeth, oral hygiene status, presence of regular oral monitoring and the existence of suspected BRONJ (stage 0) among eight BRONJ and 36 non-BRONJ subjects who completed oral examinations were then compared. RESULTS: BRONJ was observed in 0.4% of subjects on the first visit to the oral surgery clinic and in 3.2% of subjects during the follow-up period. Logistic regression analysis revealed that the odds ratio for identifying patients with BRONJ during follow-up by the presence of stage 0 at first visit was 24.0 (95% confidence interval [CI] = 3.6-161.7). The area under the receiver operating characteristic curve for identifying subjects with BRONJ by the presence of stage 0 was 0.82 (95% CI = 0.63-1.00). CONCLUSION: The results suggest that patients with stage 0 BRONJ on the first visit may progress to advanced BRONJ during the follow-up period. The oral monitoring program may contribute to the early detection of BRONJ.

[The treatment for cancer with bone metastases -whether to use zoledoronate or denosumab for bone metastases-].

Osteoclast activation is a fundamental role in developing bone metastases. The treatment of any cancers with bone metastases has been changing due to emergence of bisphosphonates. Bisphosphonate reduces the occurrence of skeletal-related events (SREs ; pathological fractures, spinal cord compression, bone pain requiring palliative radiotherapy, hypercalcemia and orthopaedic surgery) by inhibiting the osteoclast function which affects improvement of daily life. Within the Bisphosphonate zoledoronate is the most effective agent in terms of reducing SREs. Denosumab is a fully human monoclonal antibody that binds to human receptor activator of nuclear factor kappa-B ligand (RANKL) , that blocks the formation of osteoclast and inhibiting osteoclast-mediated bone destruction. Denosumab was superior to zoledonate in terms of prevention of SREs. But, denosumab was similar to zoledronic acid for quality of life, pain and overall survival. On the other hand bisphosphonate has diverse anti-tumor effects and many trials showed beneficial to survival when it used for breast cancer in an adjuvant setting especially low estradiol circumstances. Radionuclides are another treatment option for bone pain. New targeted therapies and radionuclides are promising option for treatment of bone metastases but still under investigation. This article will focus on medical treatment for bone metastases especially from breast cancer.

Combined treatment with SAHA, bortezomib, and clarithromycin for concomitant targeting of aggresome formation and intracellular proteolytic pathways enhances ER stress-mediated cell death in breast cancer cells.

The ubiquitin-proteasome pathway and the autophagy-lysosome pathway are two major intracellular protein degradation systems. We previously reported that clarithromycin (CAM) blocks autophagy flux, and that combined treatment with CAM and proteasome inhibitor bortezomib (BZ) enhances ER-stress-mediated apoptosis in breast cancer cells, whereas treatment with CAM alone results in almost no cytotoxicity. Since HDAC6 is involved in aggresome formation, which is recognized as a cytoprotective response serving to sequester misfolded proteins and facilitate their clearance by autophagy, we further investigated the combined effect of vorinostat (suberoylanilide hydroxamic acid (SAHA)), which has a potent inhibitory effect for HDAC6, with CAM and BZ in breast cancer cell lines. SAHA exhibited some cytotoxicity along with an increased acetylation level of α-tubulin, a substrate of HDAC6. Combined treatment of SAHA, CAM, and BZ potently enhanced the apoptosis-inducing effect compared with treatment using each reagent alone or a combination of two of the three. Expression levels of ER-stress-related genes, including the pro-apoptotic transcription factor CHOP (GADD153), were maximally induced by the simultaneous combination of three reagents. Like breast cancer cell lines, a wild-type murine embryonic fibroblast (MEF) cell line exhibited enhanced cytotoxicity and maximally up-regulated Chop after combined treatment with SAHA, CAM, and BZ; however, a Chop knockout MEF cell line almost completely canceled this enhanced effect. The specific HDAC6 inhibitor tubacin also exhibited a pronounced cytocidal effect with a combination of CAM plus BZ. These data suggest that simultaneous targeting of intracellular proteolytic pathways and HDAC6 enhances ER-stress-mediated apoptosis in breast cancer cells.

DJ-1 protein expression as a predictor of pathological complete remission after neoadjuvant chemotherapy in breast cancer patients.

Parkinson's disease is associated with DJ-1/Parkinson protein 7 dysfunction. In contrast, hyperactivity of DJ-1 increases the resistance of cancer cells to apoptosis. Recent genetic studies showed that, in addition to apoptosis pathways, DJ-1 is also involved in cellular defense against reactive oxygen species. The activity of apoptotic and cellular defense pathways is key in determining drug sensitivity. DJ-1 overexpression is associated with various cancers. However, we previously found that there were approximately 50 % patients with breast cancers that expressed low levels of DJ-1 protein, despite mRNA upregulation. Furthermore, low DJ-1 expression was a significant predictor of poor clinical outcome in these patients. This study aimed to determine the association between low DJ-1 protein expression and pathological complete remission (pCR) after neoadjuvant chemotherapy in breast cancer patients. Expression of DJ-1 in pre-therapeutic needle biopsies and surgical specimens obtained from 205 breast cancer cases that received neoadjuvant chemotherapy was determined using immunohistochemistry and in situ hybridization. Chemotherapy comprised epirubicin/cyclophosphamide taxane-based regimens with or without the inclusion of trastuzumab. Univariate and multivariate analyses were used to evaluate the predictive value of DJ-1 on pCR. Low DJ-1 protein expression was detected in 45.3 % (93/205) of all breast cancer cases and in 79.6 % (39/49) of pCR cases, irrespective of maintained mRNA levels. DJ-1 expression [hazard ratio (HR): 1.36; 95 % confidence interval (CI): 1.01-1.84] and HER2 status (HR: 0.84; 95 % CI: 0.62-1.14), in contrast to histological grade, hormone receptors status, Ki-67 labeling index, and intrinsic subtype, were significant predictors of pCR. Low DJ-1 expression predicted pCR in luminal A (P = 0.0004), luminal B (P = 0.0194), and triple negative (P = 0.0143) subtypes breast cancer patients and in patients receiving additional trastuzumab treatment (P = 0.008). In conclusion, low DJ-1 protein expression is a significant predictor of pCR after neoadjuvant chemotherapy in breast cancer patients.

Accuracy and validity of sentinel lymph node biopsy for breast cancer using a photosensitizer: 8-year follow-up.

BACKGROUND AND OBJECTIVE: We evaluated an alternative procedure for sentinel lymph node biopsy (SLNB) for breast cancer after approval of the study by the Ethics Committee of Tokyo Medical University Hospital in 2004. We examined the efficacy and safety of SLNB using the photosensitizer talaporfin sodium (Laserphyrin®, Meiji Seika Pharma, Tokoyo, Japan), compared with current methods. STUDY DESIGN/PATIENTS AND METHODS: The study included 21 breast cancer patients (Japanese women; median age, 54 years; range, 35-75). All patients received a breast cancer operation combined with SLNB between June 2004 and May 2005. Three milliliters of talaporfin solution was locally injected into the subareolar region just before the operation. We attempted to identify a sentinel lymph node (SLN) that exhibited fluorescence and was consistent with a radioisotope (RI) localization technique. Our purpose was to verify the accuracy and validity of the talaporfin fluorescence imaging method after 8 years of application. RESULTS: There was no consistent correlation between fluorescence and pathological SLN metastasis, although all four cases of pathological SLN metastasis revealed positive fluorescence. In some cases in which we could not identify SLNs by the RI technique, we could identify SLNs using talaporfin. The method using talaporfin did not adversely affect the patients after the operation, even the chronic renal failure patient. After 8 years, all patients are alive, and none had lymph node recurrence. Side effects were not observed. CONCLUSION: SLNB using the photosensitizer talaporfin sodium in breast cancer patients is considered to be useful as complementary to other current methods. We could evaluate the accuracy and validity of this method 8 years after all of the procedures were performed. In the future, a large-scale clinical study with statistical analyses should be conducted.

[Gemcitabine-induced tumor lysis syndrome caused by recurrent breast cancer in a patient without hemodialysis].

Tumor lysis syndrome(TLS)induced by chemotherapy for solid tumors is rare. We report a case of a 59-year-old woman with breast cancer who developed TLS. She underwent surgery to treat breast cancer in 1992. 19 years after surgery, however, she was diagnosed with multiple bone metastases(disease free interval, 13 years and 3 months). In March 2011, gemcitabine regimen was initiated(1,250mg/m2, 14 days followed by a 7-day rest period)because of worsening of multiple bone metastases. The patient was immediately admitted and treated for suspected TLS when she presented at our hospital with symptoms such as depressed level of consciousness, serious anemia, hypercalcemia, hyperuricemia, and liver/renal dysfunction on day 16 of the first line of regimen. Rasburicase was found to be effective for hyperuricemia.

High levels of DJ-1 protein in nipple fluid of patients with breast cancer.

As we have previously demonstrated that some breast cancer cell lines secrete DJ-1 protein, we examined here whether breast cancer cells secrete DJ-1 protein in vivo. To this end, the levels of DJ-1 protein present in 136 specimens of nipple fluid was examined by enzyme-linked immunosorbent assay (ELISA). The average concentration of DJ-1 protein detected in diluted samples from 47 patients with invasive ductal carcinoma (IDC) was 22.4 ng/mL, while it was 18.6 ng/mL in 26 patients with ductal carcinoma in situ (DCIS). In contrast, the average DJ-1 concentration in samples from 63 women with benign lesions was 2.7 ng/mL, demonstrating that higher DJ-1 protein levels were detected in nipple fluid in the presence of cancer cells than in the presence of benign lesions (P < 0.0001). When a cut-off level of 3.0 ng/mL was applied, the higher level of DJ-1 was shown to be of significant clinical value for predicting the presence of breast cancer (85.9% specificity, 75% sensitivity; P < 0.0001). Multivariate logistic analysis that included established factors such as nipple discharge cytology, ductoscopic cytology, and carcinoembryonic antigen level further showed that the level of DJ-1 protein alone is of significant value for predicting the presence of breast cancer. Immunohistochemistry and in situ hybridization also showed that the low expression of DJ-1 protein, despite high mRNA expression, was significantly correlated with high DJ-1 protein levels in the nipple fluid. These data indicate that breast cancer cells secrete DJ-1 protein in vivo, and that its level is a potential indicator of breast cancer in patients with nipple discharge.

Efficacy of zoledronic acid in postmenopausal Japanese women with early breast cancer receiving adjuvant letrozole: 12-month results.

Aromatase inhibitor-associated bone loss has not been proved in the Japanese or Asian women. The aim of this study was to evaluate an upfront or delayed strategy of bone protection therapy with zoledronic acid administered at 4 mg every 6 months in postmenopausal Japanese women with early breast cancer to compare with results of the Z-FAST and ZO-FAST studies in western countries. Postmenopausal women with hormone receptor positive early breast cancer receiving adjuvant letrozole were randomly assigned to receive either upfront or delayed-start zoledronic acid (4 mg intravenously every 6 months). The delayed group received zoledronic acid when lumbar spine (L(2)-L(4)) bone mineral density (BMD) decreased to less than young adult mean -2.0SD or when a nontraumatic fracture occurred. The primary endpoint of this study was to compare the percent change in L(1)-L(4) BMD at 12 months between the groups. Secondary endpoints included percent changes in L(2)-L(4) and total hip (TH) BMD. The upfront and delayed groups included 94 and 95 patients, respectively. At 12 months, L(1)-L(4), L(2)-L(4), and TH BMD significantly decreased by 2.0, 2.4, and 2.4%, respectively, in the delayed group. L(1)-L(4) BMD was 4.9% higher in the upfront group than in the delayed group (95% CI 3.9-5.8%; p < 0.001). L(2)-L(4) BMD was 5.6% higher (95% CI 4.5-6.6%; p < 0.001), and TH BMD was 4.4% higher (95% CI 3.3-5.4%; p < 0.001). At 12 months, upfront zoledronic acid therapy prevented bone loss in postmenopausal Japanese women who were receiving adjuvant letrozole, confirming the Z-/ZO-FAST study results in western populations.

Clinical significance of DJ-1 as a secretory molecule: retrospective study of DJ-1 expression at mRNA and protein levels in ductal carcinoma of the breast.

AIMS: DJ-1 is a molecule secreted into serum by some breast cancer cells. However, little is known about the clinical significance of the DJ-1 expression. METHODS AND RESULTS: Expression of DJ-1 protein was examined by immunohistochemistry, and expression of DJ-1 mRNA was detected using in-situ hybridization in 273 invasive ductal carcinomas (IDCs) and 41 ductal carcinomas in situ (DCISs) of the breast, and also in breast cancer cell lines. Breast cancer cells were examined for their secretion of DJ-1 using immunoblot analysis. By immunohistochemistry DJ-1 protein expression was lower than adjacent non-cancerous epithelium in 6 (14.6%) of the 41 DCISs and 146 (53%) of the 273 IDCs, even although all 314 carcinomas retained expression of DJ-1 mRNA, which was higher than that in adjacent non-cancerous epithelium in 220 cases (70%). Patients with IDC whose cancer cells showed low expression of DJ-1 protein had significantly shorter disease-free survival (P = 0.0152) and overall survival (P = 0.0196) than those whose cancer cells retained DJ-1 expression. MDA-MB-231 cells, which secreted DJ-1, showed low expression of DJ-1 protein. CONCLUSIONS: Low expression of DJ-1 protein with high expression of its mRNA, which may reflect a secretory expression pattern, is predictive of poor outcome in patients with IDC.

A Randomized Controlled Phase 2 Study of Neoadjuvant Eribulin Versus Paclitaxel in Women with Operable Breast Cancer: The JONIE-3 Study.

OBJECTIVE: Neoadjuvant chemotherapy (NAC) is essential for surgical downstaging of early-stage breast cancer, but taxane administration is associated with neuropathy. We investigated whether eribulin induces less neuropathy than paclitaxel. METHODS: In this multicentre, randomised study (UMIN000012817), patients diagnosed with invasive breast cancer between December 2013 and April 2016 were randomly assigned to group E (eribulin followed by fluorouracil, epirubicin, and cyclophosphamide; FEC) or group P (paclitaxel followed by FEC). The primary endpoint was incidence of grade 1 or higher peripheral neuropathy according to the Common Terminology Criteria for Adverse Events (CTCAE). Secondary endpoints were pathological complete response (pCR), clinical response, breast-conserving surgery, adverse events, disease-free survival (DFS), and patient neurotoxicity questionnaire (PNQ) analysis. RESULTS: One hundred and eighteen cases were analyzed for safety and 115 were evaluated for efficacy. Peripheral sensory neuropathy was significantly lower in group E after week 6, while peripheral motor neuropathy in group E was significantly lower at weeks 9, 12, and 15. pCR in groups E and P was 20.7% and 29.8% (P = .289), respectively, and clinical response was 55.2% and 77.2% (P = .017), respectively. Three-year DFS was 89.7% in group E and 86.0% in group P (P = .561). Neutropenia was more frequent and more severe in group E. PNQ was evaluated for 4 years, and item 1 (sensory) was consistently lower in group E. CONCLUSION: Neuropathy was significantly less frequent and less severe in patients who received eribulin compared with paclitaxel. Thus, eribulin could be a good alternative to paclitaxel in patients suffering severe neuropathy.

Overexpression of HER2 signaling to WAVE2-Arp2/3 complex activates MMP-independent migration in breast cancer.

The final signal for triggering the formation of lamellipodia that initiate directional migration of mammalian cells is binding of the Wiskott-Aldrich syndrome (WASP)/WASP family verproline-homologous protein 2 (WAVE2) to the actin-related protein 2 and 3 (Arp2/3) complex. This WAVE2-Arp2/3 signal is suggested to be enhanced in some breast cancers, facilitating invasion, and/or metastasis. Here, we demonstrated one cause of the enhanced signal using four breast cancer cell lines (SKBR3, AU565, MCF7, and MDA-MB-231). The WAVE2-Arp2/3 signal was estimated semi-quantitatively by counting the number of lamellipodia expressing both WAVE2 and Arp2 using high-power confocal laser microscopy. Higher expression of the WAVE2-Arp2/3 signal was detected in SKBR3 and AU565, which have HER2 gene amplification, than in the other two cell lines that lack HER2 gene amplification. Trastuzumab suppressed both the formation of lamellipodia and migration in a Boyden chamber experiment in SKBR3 and AU565. When the HER2 gene was transfected into MCF7, the number of both lamellipodia and migrated cells was increased. This enhancement of migration did not occur in the presence of extracellular matrix, and zymographic analysis showed no clear difference between HER2 gene-transfected cells and MCF7 cells. Immunohistochemical analysis of 115 cases of breast cancer revealed that coexpression of WAVE2 and Arp2 was significantly correlated with HER2-overexpression (P < 0.0001). These data indicate that an abnormal signal resulting from HER2 gene amplification activates lamellipodia formation in breast cancer cells, which initiates their metalloproteinase-independent migration.

Monthly versus 3-monthly goserelin acetate treatment in pre-menopausal patients with estrogen receptor-positive early breast cancer.

This study compared the efficacy and safety of a 3-monthly 10.8-mg depot goserelin (Zoladex(TM)) injection with the current 3.6 mg monthly dose in pre-menopausal Japanese women with estrogen receptor-positive (ER+) early breast cancer. This was a multicenter, open-label, randomized study. Primary endpoint was a non-inferiority analysis (10.8/3.6 mg) of the area under the concentration-time curve (AUC) of estradiol (E(2)) over the first 24 weeks. Secondary endpoints included E(2) and follicle-stimulating hormone (FSH) concentrations, menstruation, and safety and tolerability. In total, 170 patients were randomized to receive goserelin 10.8 mg every 3 months (n = 86) or 3.6 mg every month (n = 84). Mean AUCs for E(2) were similar between treatment groups (18.32 and 18.95 pg/ml·week for goserelin 10.8 and 3.6 mg, respectively). AUC ratio was 0.974 (95% confidence interval, 0.80, 1.19), indicating non-inferiority for goserelin 10.8 mg. Serum E(2) and FSH remained suppressed throughout the study and no patient experienced menses after week 16. No clinically important differences in safety and tolerability were observed between the two groups. In terms of E(2) suppression, 3-monthly goserelin 10.8 mg was non-inferior to monthly goserelin 3.6 mg in pre-menopausal women with ER+ breast cancer.

A case of contralateral inguinal lymph node metastases from breast cancer.

BACKGROUND: Breast cancer is well known to tends to invade through the lymphatic chains mainly to the axillary and subclavian nodes or occasionally to the internal mammary nodes. However, inguinal lymph node metastasis from breast cancer is extremely rare. CASE PRESENTATION: We have experienced a case of an 82-year-old woman showing left inguinal lymph node metastases from right breast cancer. Previously, she had received five times abdominal operations and left artificial bone head replacement for metamorphous hip-joint disease. Although the metastases were firstly detected 46 months after the breast surgery, they had already existed at the time of the breast operation, which was retrospectively re-evaluated by CT examination. The progression pattern of inguinal lymph node metastases had much correlated with that of the breast cancer. She underwent inguinal lymph node dissections. Pathological findings revealed them being compatible with breast cancer origin. CONCLUSIONS: This is the sixth case having been reported in English literature. Besides, this is the first case showing the contralateral spread to the primary breast cancer. One of the causes of this complex metastatic pattern is thought be ascribed to the previously performed prolific abdominal operations.

Impact of the Relative Dose Intensity of Neoadjuvant Chemotherapy With Anthracycline Followed by Taxane on the Survival of Patients With Human Epidermal Growth Factor Receptor 2-negative Breast Cancer: The JONIE1 Study.

BACKGROUND/AIM: We evaluated the impact of the relative dose intensity (RDI) of neoadjuvant chemotherapy (NAC) on the survival of patients with breast cancer (BC). PATIENTS AND METHODS: This randomized phase II trial included 188 patients with human epidermal growth factor receptor 2 (HER2)-negative BC treated with anthracycline followed by paclitaxel as NAC. We grouped patients using a relative dose intensity (RDI) threshold of 85% and evaluated clinicopathological features and clinical outcomes. RESULTS: The 5-year overall survival rate was 91.2% and 76.3%, when RDI ≥85% and <85%, respectively (p=0.015). Age, tumor, and node status, and the RDI were significantly different on univariate analysis, but not on multivariate analysis. An exploratory subgroup analysis revealed that a low RDI was associated with low overall survival of patients with obesity, T1/2 disease, and lymph node metastases. CONCLUSION: Maintaining the RDI of NAC is crucial for achieving the survival benefit in selected patients with HER2-negative BC.