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https://www.readbyqxmd.com/read/27793948/clinical-significance-of-the-histoculture-drug-response-assay-in-breast-cancer
#1
Yoshiaki Shinden, Yuko Kijima, Munetsugu Hirata, Hideo Arima, Akihiro Nakajyo, Kiyonori Tanoue, Kosei Maemura, Shoji Natsugoe
BACKGROUND/AIM: Despite the fact that breast cancer patients are generally administered systemic chemotherapy after surgical treatment, predictive factors that allow optimization of chemotherapy are needed. The histoculture drug response assay (HDRA) is a clinically practical in vitro drug-response assay for identifying optimal anticancer agents. PATIENTS AND METHODS: Thirty-eight primary breast cancer patients who underwent surgical treatment without receiving systemic neoadjuvant therapy were analyzed...
November 2016: Anticancer Research
https://www.readbyqxmd.com/read/27721762/combination-chemotherapy-of-mitomycin-c-and-methotrexate-was-effective-on-metastatic-breast-cancer-resistant-to-eribulin-vinorelbine-and-bevacizumab-after-anthracycline-taxane-and-capecitabine
#2
Masahiko Tanabe
Complete cure of metastatic breast cancer (MBC) is still considered difficult even after the development of new drugs. While new drugs have been continuously developed, conventional drugs such as mitomycin C (MMC) and methotrexate (MTX) have become less used. Combination chemotherapy with MMC and MTX (MMC/MTX) was reported to be effective for 9.7-19.4% of 31 patients with human epidermal growth factor receptor type 2 (HER2)-negative MBC who were aggressively treated with anthracycline, taxane, capecitabine, and vinorelbine...
May 2016: Case Reports in Oncology
https://www.readbyqxmd.com/read/27277787/coordination-of-the-recruitment-of-the-fancd2-and-palb2-fanconi-anemia-proteins-by-an-ubiquitin-signaling-network
#3
Gregory Bick, Fan Zhang, A Ruhikanta Meetei, Paul R Andreassen
Fanconi anemia (FA) is a chromosome instability syndrome and the 20 identified FA proteins are organized into two main arms which are thought to function at distinct steps in the repair of DNA interstrand crosslinks (ICLs). These two arms include the upstream FA pathway, which culminates in the monoubiquitination of FANCD2 and FANCI, and downstream breast cancer (BRCA)-associated proteins that interact in protein complexes. How, and whether, these two groups of FA proteins are integrated is unclear. Here, we show that FANCD2 and PALB2, as indicators of the upstream and downstream arms, respectively, colocalize independently of each other in response to DNA damage induced by mitomycin C (MMC)...
June 8, 2016: Chromosoma
https://www.readbyqxmd.com/read/27232881/clinicopathological-characteristics-of-mucinous-breast-cancer-a-retrospective-analysis-of-a-10-year-study
#4
Lei Lei, Xingfei Yu, Bo Chen, Zhanhong Chen, Xiaojia Wang
BACKGROUND: Mucinous breast carcinoma (MC) is a special type of breast cancer that presents with a large amount of extracellular mucin. MC comprises approximately 4% of all invasive breast cancers. This type of tumor has a better prognosis and higher incidence in peri- and post-menopausal patients. Pathologically, there are two main subtypes of MC: pure and mixed. In this study, we describe 10 years of experience with MC at the Zhejiang Cancer Hospital in China, specifically, clinical data, histological findings and immunohistochemical features...
2016: PloS One
https://www.readbyqxmd.com/read/26305906/curcumin-improves-the-tumoricidal-effect-of-mitomycin-c-by-suppressing-abcg2-expression-in-stem-cell-like-breast-cancer-cells
#5
Qianmei Zhou, Meina Ye, Yiyu Lu, Hui Zhang, Qilong Chen, Shuang Huang, Shibing Su
Cancer cells with stem cell-like properties contribute to the development of resistance to chemotherapy and eventually to tumor relapses. The current study investigated the potential of curcumin to reduce breast cancer stem cell (BCSC) population for sensitizing breast cancer cells to mitomycin C (MMC) both in vitro and in vivo. Curcumin improved the sensitivity of paclitaxel, cisplatin, and doxorubicin in breast cancer cell lines MCF-7 and MDA-MB-231, as shown by the more than 2-fold decrease in the half-maximal inhibitory concentration of these chemotherapeutic agents...
2015: PloS One
https://www.readbyqxmd.com/read/26217553/combination-chemotherapy-with-mitomycin-c-and-methotrexate-is-active-against-metastatic-her2-negative-breast-cancer-even-after-treatment-with-anthracycline-taxane-capecitabine-and-vinorelbine
#6
Takayo Fukuda, Masahiko Tanabe, Kokoro Kobayashi, Ippei Fukada, Shunji Takahashi, Takuji Iwase, Yoshinori Ito
BACKGROUND: Combination chemotherapy with mitomycin C and methotrexate (MM) was reported to be effective for 24% of patients with metastatic breast cancer (MBC) who had been treated with anthracycline and taxane. Antimetabolites such as capecitabine and antitubulins such as vinorelbine have been generally used for MBC treatment after anthracycline and taxane. A subsequent choice of chemotherapy should be offered to patients with MBC who have kept good performance status (PS) after being aggressively treated with anthracycline, taxane, capecitabine, and vinorelbine (ATCV), but is not well clear which treatment is superior to others after ATCV...
2015: SpringerPlus
https://www.readbyqxmd.com/read/25885449/yy1-suppresses-fen1-over-expression-and-drug-resistance-in-breast-cancer
#7
Jianwei Wang, Lina Zhou, Zhi Li, Ting Zhang, Wenpeng Liu, Zheng Liu, Yate-Ching Yuan, Fan Su, Lu Xu, Yan Wang, Xiaotong Zhou, Hong Xu, Yuejin Hua, Ying-Jie Wang, Li Zheng, Yue-E Teng, Binghui Shen
BACKGROUND: Drug resistance is a major challenge in cancer therapeutics. Abundant evidence indicates that DNA repair systems are enhanced after repetitive chemotherapeutic treatments, rendering cancers cells drug-resistant. Flap endonuclease 1 (FEN1) plays critical roles in DNA replication and repair and in counteracting replication stress, which is a key mechanism for many chemotherapeutic drugs to kill cancer cells. FEN1 was previously shown to be upregulated in response to DNA damaging agents...
February 13, 2015: BMC Cancer
https://www.readbyqxmd.com/read/25786718/a-novel-nanoparticle-formulation-overcomes-multiple-types-of-membrane-efflux-pumps-in-human-breast-cancer-cells
#8
Preethy Prasad, Ji Cheng, Adam Shuhendler, Andrew M Rauth, Xiao Yu Wu
Multidrug resistance (MDR) in cancer cells can involve overexpression of different types of membrane drug efflux pumps and other drug resistance mechanisms. Hence, inhibition of one resistance mechanism may not be therapeutically effective. Previously we demonstrated a new polymer lipid hybrid nanoparticle (PLN) system was able to circumvent drug resistance of P-glycoprotein (P-gp) overexpressing breast cancer cells. The objectives of the present study were 2-fold: (1) to evaluate the ability of the PLN system to overcome two other membrane efflux pumps-multidrug resistance protein 1 (MRP1+) and breast cancer resistance protein (BCRP+) overexpressed on human breast cancer cell lines MCF7 VP (MRP1+) and MCF7 MX (BCRP+); and (2) to evaluate possible synergistic effects of doxorubicin (Dox)-mitomycin C (MMC) in these cell lines...
April 2012: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/25777376/yy1-suppresses-fen1-over-expression-and-drug-resistance-in-breast-cancer
#9
Jianwei Wang, Lina Zhou, Zhi Li, Ting Zhang, Wenpeng Liu, Zheng Liu, Yate-Ching Yuan, Fan Su, Lu Xu, Yan Wang, Xiaotong Zhou, Hong Xu, Yuejin Hua, Ying-Jie Wang, Li Zheng, Yue-E Teng, Binghui Shen
BACKGROUND: Drug resistance is a major challenge in cancer therapeutics. Abundant evidence indicates that DNA repair systems are enhanced after repetitive chemotherapeutic treatments, rendering cancers cells drug-resistant. Flap endonuclease 1 (FEN1) plays critical roles in DNA replication and repair and in counteracting replication stress, which is a key mechanism for many chemotherapeutic drugs to kill cancer cells. FEN1 was previously shown to be upregulated in response to DNA damaging agents...
2015: BMC Cancer
https://www.readbyqxmd.com/read/25447153/alpha-momorcharin-%C3%AE-mmc-exerts-effective-anti-human-breast-tumor-activities-but-has-a-narrow-therapeutic-window-in-vivo
#10
Dongliang Cao, Yun Sun, Ling Wang, Qianchuan He, Juecun Zheng, Fei Deng, Shanshan Deng, ShuChing Chang, XiaoPing Yu, Minhui Li, Yao Meng, Jiagui Jin, Fubing Shen
Alpha-momorcharin (α-MMC), a ribosome inactivating protein (RIP) extracted from the seeds of Momordica charantia, exerts anti-tumor, antiviral, and anti-fungal activities. However, α-MMC has an obvious toxicity that limits its clinical application. We examined the effect of α-MMC on the inhibition of human breast cancer and assessed its general toxicity to find the therapeutic window in vivo for its potential clinical use. It was purified using column chromatography, and then injected into the xenograft nude mouse model induced by MDA-MB-231 and MCF-7...
January 2015: Fitoterapia
https://www.readbyqxmd.com/read/25226537/synergistic-effect-of-combinatorial-treatment-with-curcumin-and-mitomycin-c-on-the-induction-of-apoptosis-of-breast-cancer-cells-a-cdna-microarray-analysis
#11
Qian-Mei Zhou, Qi-Long Chen, Jia Du, Xiu-Feng Wang, Yi-Yu Lu, Hui Zhang, Shi-Bing Su
In order to explore the synergistic mechanisms of combinatorial treatment using curcumin and mitomycin C (MMC) for breast cancer, MCF-7 breast cancer xenografts were conducted to observe the synergistic effect of combinatorial treatment using curcumin and MMC at various dosages. The synergistic mechanisms of combinatorial treatment using curcumin and MMC on the inhibition of tumor growth were explored by differential gene expression profile, gene ontology (GO), ingenuity pathway analysis (IPA) and Signal-Net network analysis...
2014: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/24830351/synergistic-nanoparticulate-drug-combination-overcomes-multidrug-resistance-increases-efficacy-and-reduces-cardiotoxicity-in-a-nonimmunocompromised-breast-tumor-model
#12
Adam J Shuhendler, Preethy Prasad, Rui Xue Zhang, Mohammad Ali Amini, Mei Sun, Peter P Liu, Robert G Bristow, Andrew M Rauth, Xiao Yu Wu
Anthracyclines, commonly employed for cancer chemotherapy, suffer from dose-limiting cardiotoxicity and poor efficacy due to multidrug resistance (MDR). We previously demonstrated that simultaneous delivery of the synergistic drugs doxorubicin (DOX) and mitomycin C (MMC) by polymer-lipid hybrid nanoparticles (PLN) circumvented MDR, increased efficacy, and reduced cardiotoxicity in immuncompromised mice superior to poly(ethylene glycol)-coated (PEGylated) lipososmal DOX (PLD). Herein it is shown that the DOX-MMC combination was also synergistic in MDR EMT6/AR1 murine breast cancer cells and that their nanoparticle formulations were able to overcome the MDR phenotype...
August 4, 2014: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/24789349/the-fanconi-anemia-pathway-sensitizes-to-dna-alkylating-agents-by-inducing-jnk-p53-dependent-mitochondrial-apoptosis-in-breast-cancer-cells
#13
Lin Zhao, Yanlin Li, Miao He, Zhiguo Song, Shu Lin, Zhaojin Yu, Xuefeng Bai, Enhua Wang, Minjie Wei
The Fanconi anemia/BRCA (FA/BRCA) DNA damage repair pathway plays a pivotal role in the cellular response to DNA alkylating agents and greatly influences drug response in cancer treatment. However, the molecular mechanisms underlying the FA/BRCA pathway reversed resistance have received limited attention. In the present study, we investigated the effect of Fanconi anemia complementation group F protein (FANCF), a critical factor of the FA/BRCA pathway, on cancer cell apoptosis induced by DNA alkylating agents such as mitomycin c (MMC)...
July 2014: International Journal of Oncology
https://www.readbyqxmd.com/read/24440306/importin-%C3%AE-dependent-nuclear-import-of-topbp1-in-atr-chk1-checkpoint-in-xenopus-egg-extracts
#14
Liping Bai, W Matthew Michael, Shan Yan
TopBP1, a multiple-BRCT-containing protein, plays diverse functions in DNA metabolism including DNA replication, DNA damage response and transcriptional regulation. The cytoplasmic localization of TopBP1 has been found to be associated with breast cancer susceptibility in clinical studies, suggesting the biological significance of TopBP1's sub-cellular localization. However, it remains elusive how TopBP1 is shuttled into nucleus and recruited to chromatin under normal or stressful conditions. Taking advantage of Xenopus egg extract, we identified Importin β as a new interacting protein of the TopBP1 C-terminus...
May 2014: Cellular Signalling
https://www.readbyqxmd.com/read/24155758/silencing-of-fanconi-anemia-complementation-group-f-exhibits-potent-chemosensitization-of-mitomycin-c-activity-in-breast-cancer-cells
#15
Jiankun Yu, Lin Zhao, Yanlin Li, Na Li, Miao He, Xuefeng Bai, Zhaojin Yu, Zhihong Zheng, Xiaoyi Mi, Enhua Wang, Minjie Wei
PURPOSE: Fanconi anemia complementation group F (FANCF) is a key factor to maintaining the function of Fanconi anaemia/BRCA (FA/BRCA) pathway, a DNA-damage response pathway. However, the functional role of FANCF in breast cancer has not been elucidated. In the present study, we evaluated the chemosensitization effect of FANCF in breast cancer cells. METHODS: We performed specific knockdown of the endogenous FANCF in breast cancer cells by transfecting the cells with an FANCF short hairpin RNA (shRNA) vector...
September 2013: Journal of Breast Cancer
https://www.readbyqxmd.com/read/24069344/tocotrienol-adjuvanted-dendritic-cells-inhibit-tumor-growth-and-metastasis-a-murine-model-of-breast-cancer
#16
Sitti Rahma Abdul Hafid, Srikumar Chakravarthi, Kalanithi Nesaretnam, Ammu Kutty Radhakrishnan
Tocotrienol-rich fraction (TRF) from palm oil is reported to possess anti-cancer and immune-enhancing effects. In this study, TRF supplementation was used as an adjuvant to enhance the anti-cancer effects of dendritic cells (DC)-based cancer vaccine in a syngeneic mouse model of breast cancer. Female BALB/c mice were inoculated with 4T1 cells in mammary pad to induce tumor. When the tumor was palpable, the mice in the experimental groups were injected subcutaneously with DC-pulsed with tumor lysate (TL) from 4T1 cells (DC+TL) once a week for three weeks and fed daily with 1 mg TRF or vehicle...
2013: PloS One
https://www.readbyqxmd.com/read/23840564/assessment-of-slx4-mutations-in-hereditary-breast-cancers
#17
Sohela Shah, Yonghwan Kim, Irina Ostrovnaya, Rajmohan Murali, Kasmintan A Schrader, Francis P Lach, Kara Sarrel, Rohini Rau-Murthy, Nichole Hansen, Liyng Zhang, Tomas Kirchhoff, Zsofia Stadler, Mark Robson, Joseph Vijai, Kenneth Offit, Agata Smogorzewska
BACKGROUND: SLX4 encodes a DNA repair protein that regulates three structure-specific endonucleases and is necessary for resistance to DNA crosslinking agents, topoisomerase I and poly (ADP-ribose) polymerase (PARP) inhibitors. Recent studies have reported mutations in SLX4 in a new subtype of Fanconi anemia (FA), FA-P. Monoallelic defects in several FA genes are known to confer susceptibility to breast and ovarian cancers. METHODS AND RESULTS: To determine if SLX4 is involved in breast cancer susceptibility, we sequenced the entire SLX4 coding region in 738 (270 Jewish and 468 non-Jewish) breast cancer patients with 2 or more family members affected by breast cancer and no known BRCA1 or BRCA2 mutations...
2013: PloS One
https://www.readbyqxmd.com/read/23660835/involvement-of-atpol%C3%AE-in-the-repair-of-high-salt-and-dna-cross-linking-agent-induced-double-strand-breaks-in-arabidopsis
#18
Sujit Roy, Swarup Roy Choudhury, Dibyendu N Sengupta, Kali Pada Das
DNA polymerase λ (Pol λ) is the sole member of family X DNA polymerase in plants and plays a crucial role in nuclear DNA damage repair. Here, we report the transcriptional up-regulation of Arabidopsis (Arabidopsis thaliana) AtPolλ in response to abiotic and genotoxic stress, including salinity and the DNA cross-linking agent mitomycin C (MMC). The increased sensitivity of atpolλ knockout mutants toward high salinity and MMC treatments, with higher levels of accumulation of double strand breaks (DSBs) than wild-type plants and delayed repair of DSBs, has suggested the requirement of Pol λ in DSB repair in plants...
June 2013: Plant Physiology
https://www.readbyqxmd.com/read/23568523/riboflavin-targeted-polymer-conjugates-for-breast-tumor-delivery
#19
Lisa M Bareford, Brittany R Avaritt, Hamidreza Ghandehari, Anjan Nan, Peter W Swaan
PURPOSE: In breast cancer, a significant decrease in riboflavin (RF) serum levels and increase in RF carrier protein occurs, indicating a potential role of RF in disease progression. To evaluate RF's ability to serve as a targeting agent, mitomycin C (MMC)-conjugated N-(2-hydroxypropyl)methacrylamide (HPMA) copolymers were synthesized and targeted to the RF internalization pathway in human breast cancer cells. METHODS: Competitive uptake studies were used to determine specificity of RF-targeted conjugates, and an MTT assay established the IC₅₀ for the conjugates...
July 2013: Pharmaceutical Research
https://www.readbyqxmd.com/read/23123017/synthesis-and-docking-studies-of-novel-antitumor-benzimidazoles
#20
Mohamed A Omar, Yasser M Shaker, Shadia A Galal, Mamdouh M Ali, Sean M Kerwin, Jing Li, Harukuni Tokuda, Raghda A Ramadan, Hoda I El Diwani
In this work, the benzimidazole-pyrrole conjugates 6a-h and benzimidazole-tetracycles conjugates 12-14 were prepared. The cytotoxicity of the compounds 3, 4a-h, 6a-h, 8, 10 and 12-14 was tested against lung cancer cell line A549. Compound 6b exhibited higher activity than the bis-benzoxazole natural product (UK-1), the standard. The tested 4g,h, 6a-h, 10 and 12-14 exhibited remarkable cytotoxicity activity against breast cancer cell line MCF-7 with higher activity than tamoxifen. Furthermore, compound 4h was found to be also more potent than doxurubicin...
December 15, 2012: Bioorganic & Medicinal Chemistry
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