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https://www.readbyqxmd.com/read/28538665/molecular-basis-of-alcohol-related-gastric-and-colon-cancer
#1
REVIEW
Hye-Kyung Na, Ja Young Lee
Many meta-analysis, large cohort studies, and experimental studies suggest that chronic alcohol consumption increases the risk of gastric and colon cancer. Ethanol is metabolized by alcohol dehydrogenases (ADH), catalase or cytochrome P450 2E1 (CYP2E1) to acetaldehyde, which is then further oxidized to acetate by aldehyde dehydrogenase (ALDH). Acetaldehyde has been classified by the International Agency for Research on Cancer (IARC) as a Group 1 carcinogen to humans. The acetaldehyde level in the stomach and colon is locally influenced by gastric colonization by Helicobacter pylori or colonic microbes, as well as polymorphisms in the genes encoding tissue alcohol metabolizing enzymes, especially ALDH2...
May 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28532411/aldehyde-dehydrogenase-2-2-knock-in-mice-show-increased-reactive-oxygen-species-production-in-response-to-cisplatin-treatment
#2
Jeewon Kim, Che-Hong Chen, Jieying Yang, Daria Mochly-Rosen
BACKGROUND: The aldehyde dehydrogenase (ALDH) enzyme family metabolizes and detoxifies both exogenous and endogenous aldehydes. Since chemotherapeutic agents, such as cisplatin, generate cytotoxic aldehydes and oxidative stress, and chemoresistant cancer cells express high levels of ALDH enzymes, we hypothesized that different ALDH expression within cells may show different chemosensitivity. ALDH2 has the lowest Km for acetaldehyde among ALDH isozymes and detoxifies acetaldehydes in addition to other reactive aldehydes, such as 4-hydroxy-nonenal, malondialdehyde and acrolein produced from lipid peroxidation by reactive oxygen species (ROS)...
May 22, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28521301/activation-of-signal-transducer-and-activator-of-transcription-3-stat3-signaling-in-egfr-mutant-non-small-cell-lung-cancer-nsclc
#3
Carles Codony-Servat, Jordi Codony-Servat, Niki Karachaliou, Miguel Angel Molina, Imane Chaib, Jose Luis Ramirez, Maria de Los Llanos Gil, Flavio Solca, Trever G Bivona, Rafael Rosell
Gefitinib, erlotinib or afatinib are the current treatment for non-small-cell lung cancer (NSCLC) harboring an activating mutation of the epidermal growth factor receptor (EGFR), but less than 5% of patients achieve a complete response and the median progression-free survival is no longer than 12 months. Early adaptive resistance can occur as soon as two hours after starting treatment by activating signal transducer and activation of transcription 3 (STAT3) signaling. We investigated the activation of STAT3 in a panel of gefitinib-sensitive EGFR mutant cell lines, and gefitinib-resistant PC9 cell lines developed in our laboratory...
May 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28503055/protein-markers-associated-with-an-aldh-sub-population-in-colorectal-cancer
#4
Rui Yang, Xinhua Liu, Smathorn Thakolwiboon, Jianhui Zhu, Xiucong Pei, Mingrui An, Zhijing Tan, David M Lubman
ALDH has been shown to be a marker that denotes a sub-population of cancer stem cells in colorectal and other cancers. This sub-population of cells shows an increased risk for tumor initiation, metastasis, and resistance to chemotherapy and radiation resulting in recurrence and death. It is thus essential to identify the important signaling pathways related to ALDH1+ CSCs in colon cancer. The essential issue becomes to isolate pure sub-populations of cells from heterogeneous tissues for further analysis. To achieve this goal, tissues from colorectal cancer Stage III patients were immuno-stained with ALDH1 antibody...
October 2016: Journal of Proteomics & Bioinformatics
https://www.readbyqxmd.com/read/28498874/soluble-bone-derived-osteopontin-promotes-migration-and-stem-like-behavior-of-breast-cancer-cells
#5
Graciella M Pio, Ying Xia, Matthew M Piaseczny, Jenny E Chu, Alison L Allan
Breast cancer is a leading cause of cancer death in women, with the majority of these deaths caused by metastasis to distant organs. The most common site of breast cancer metastasis is the bone, which has been shown to provide a rich microenvironment that supports the migration and growth of breast cancer cells. Additionally, growing evidence suggests that breast cancer cells that do successfully metastasize have a stem-like phenotype including high activity of aldehyde dehydrogenase (ALDH) and/or a CD44+CD24- phenotype...
2017: PloS One
https://www.readbyqxmd.com/read/28487386/an-mirna-expression-signature-for-the-human-colonic-stem-cell-niche-distinguishes-malignant%C3%A2-from-normal-epithelia
#6
Vignesh Viswanathan, Shirish Damle, Tao Zhang, Lynn M Opdenaker, Shirin Modarai, Monica Accerbi, Skye Schmidt, Pamela J Green, Deni Galileo, Juan P Palazzo, Jeremy Fields, Sepehr Haghighat, Isidore Rigoutsos, Gregory E Gonye, Bruce M Boman
Malignant transformation of tissue stem cells may be the root of most cancer. Accordingly, we identified miRNA expression patterns in the normal human colonic stem cell (SC) niche to understand how cancer stem cells (CSCs) may arise. In profiling miRNA expression in SC-enriched crypt subsections isolated from fresh, normal surgical specimens, we identified 16 miRNAs that were differentially expressed in the crypt bottom, creating a SC signature for normal colonic epithelia (NCE). A parallel analysis of colorectal cancer (CRC) tissues showed differential expression of 83 miRNAs relative to NCE...
May 9, 2017: Cancer Research
https://www.readbyqxmd.com/read/28455980/targeting-aldehyde-dehydrogenase-activity-in-head-and-neck-squamous-cell-carcinoma-with-a-novel-small-molecule-inhibitor
#7
Jeewon Kim, June Ho Shin, Che-Hong Chen, Leslie Cruz, Lovisa Farnebo, Jieying Yang, Paula Borges, Gugene Kang, Daria Mochly-Rosen, John B Sunwoo
Chemoresistant cancer cells express high levels of aldehyde dehydrogenases (ALDHs), particularly in head and neck squamous cell carcinoma (HNSCC). The ALDH family of enzymes detoxify both exogenous and endogenous aldehydes. Since many chemotherapeutic agents, such as cisplatin, result in the generation of cytotoxic aldehydes and oxidative stress, we hypothesized that cells expressing high levels of ALDH may be more chemoresistant due to their increased detoxifying capacity and that inhibitors of ALDHs may sensitize them to these drugs...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28455241/in%C3%A2-vitro-and-in%C3%A2-vivo-anti-uveal-melanoma-activity-of-jsl-1-a-novel-hdac-inhibitor
#8
Yun Wang, Maoxing Liu, Yanli Jin, Sheng Jiang, Jingxuan Pan
Uveal melanoma (UM) is the most common intraocular malignant neoplasm in adults. Despite the availability of enucleation, radiation and chemotherapy, the prognosis of patients with metastasis remains poor. Therefore, novel effective therapies for patients with metastatic UM are urgently needed. In the present study, we demonstrated that JSL-1, a novel HDAC inhibitor, effectively inhibited the proliferation. JSL-1 induced apoptosis with increased expression of proapoptotic BH3-only protein BIM in UM cells. JSL-1 suppressed migration and invasion of UM cells with MMP-2 decreased...
April 26, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28440205/in-vitro-collapsing-colon-cancer-cells-by-selectivity-of-disulfiram-loaded-charge-switchable-nanoparticles-against-cancer-stem-cells
#9
Marwa Muhammad Abu-Serie, Fatma Hassan El-Rashidy
BACKGROUND: Different strategies against colon cancer are accompanied by treatment failure, because of drug toxicity toward normal cells and cancer stem cells (CSCs) resistance. However, previous patent evaluated liposome that encapsulated inhibitor of CSCs' aldehyde dehydrogenase (ALDH)1; disulfiram, for targeting breast CSCs. Liposome has disadvantages due to its hydrophobicity. OBJECTIVES: Designing hydrophilic nanoparticles have selectivity to release disulfiram in CC cells rather than in normal colonocytes based on variation in microenvironment between normal and cancer cells...
April 24, 2017: Recent Patents on Anti-cancer Drug Discovery
https://www.readbyqxmd.com/read/28431562/effects-of-the-common-polymorphism-in-the-human-aldehyde-dehydrogenase-2-aldh2-gene-on-the-lung
#10
Aoi Kuroda, Ahmed E Hegab, Gao Jingtao, Shuji Yamashita, Nobuyuki Hizawa, Tohru Sakamoto, Hideyasu Yamada, Satoshi Suzuki, Makoto Ishii, Ho Namkoong, Takanori Asakura, Mari Ozaki, Hiroyuki Yasuda, Junko Hamamoto, Shizuko Kagawa, Kenzo Soejima, Tomoko Betsuyaku
BACKGROUND: Aldehyde dehydrogenases (ALDHs) play a major role in detoxification of aldehydes. High expression of ALDHs is a marker for stem cells of many organs including the lungs. A common polymorphism in ALDH2 gene (ALDH2*2) results in inactivation of the enzyme and is associated with alcohol flushing syndrome and increased risk for cardiovascular and Alzheimer's diseases and some cancers. The effect of this ALDH2 polymorphism on the lung and its stem cells has not been thoroughly examined...
April 21, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28430034/um-chor1-establishment-and-characterization-of-the-first-validated-clival-chordoma-cell-line
#11
John Henry Owen, Christine M Komarck, Anthony C Wang, Waleed M Abuzeid, Richard F Keep, Erin L McKean, Stephen Sullivan, Xing Fan, Mark E P Prince
OBJECTIVE Chordomas are rare malignant tumors thought to arise from remnants of the notochord. They can be located anywhere along the axial skeleton but are most commonly found in the clival and sacrococcygeal regions, where the notochord regresses during fetal development. Chordomas are resistant to many current therapies, leaving surgery as the primary method of treatment. Cancer cell lines have been useful for developing new cancer treatments in a laboratory setting that can then be transferred to the clinic, but there are only 4 validated chordoma cell lines available...
April 21, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28411198/correction-egfl6-regulates-the-asymmetric-division-maintenance-and-metastasis-of-aldh-ovarian-cancer-cells
#12
(no author information available yet)
No abstract text is available yet for this article.
April 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28394345/cripto-and-its-signaling-partner-grp78-drive-the-metastatic-phenotype-in-human-osteotropic-prostate-cancer
#13
E Zoni, L Chen, S Karkampouna, Z Granchi, E I Verhoef, F La Manna, J Kelber, R C M Pelger, M D Henry, E Snaar-Jagalska, G J L H van Leenders, L Beimers, P Kloen, P C Gray, G van der Pluijm, M Kruithof-de Julio
CRIPTO (CR-1, TDGF1) is a cell surface/secreted oncoprotein actively involved in development and cancer. Here, we report that high expression of CRIPTO correlates with poor survival in stratified risk groups of prostate cancer (PCa) patients. CRIPTO and its signaling partner glucose-regulated protein 78 (GRP78) are highly expressed in PCa metastases and display higher levels in the metastatic ALDH(high) sub-population of PC-3M-Pro4Luc2 PCa cells compared with non-metastatic ALDH(low). Coculture of the osteotropic PC-3M-Pro4Luc2 PCa cells with differentiated primary human osteoblasts induced CRIPTO and GRP78 expression in cancer cells and increases the size of the ALDH(high) sub-population...
April 10, 2017: Oncogene
https://www.readbyqxmd.com/read/28393208/isolation-of-cancer-progenitor-cells-from-cancer-stem-cells-in-gastric-cancer
#14
Zhiyang Shang, Yingxin Xu, Wentao Liang, Kai Liang, Xiang Hu, Lei Wang, Zhenyu Zou, Yue Ma
The success of cancer treatment may depend on the complete elimination of cancer stem cells (CSCs). However, data regarding the current characterization of CSCs in different types of tumor are inconsistent, possibly due to the mixture of CSCs with cancer progenitor cells (CPCs). Therefore, it is important to exclude CPCs for the characterization of CSCs. The present study aimed to characterize gastric cancer stem cells (GCSC) by separating GCPC from gastric progenitor cells (GCSC) with flow cytometry. In total, 615 murine gastric cancer (GC) cells were divided into aldehyde dehydrogenase (ALDH)high, ALDHlow and ALDHneg groups by flow cytometry according to their ALDH activity...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28373443/dynamic-phenotypic-transition-of-breast-cancer-cells-in-vitro-revealed-by-self-floating-cell-culture
#15
Yusuke Oku, Naoyuki Nishiya, Kayoko Tsuda, Masahiko Shibazaki, Chihaya Maesawa, Yoshimasa Uehara
BACKGROUND: Breast tumor heterogeneity leads to phenotypic diversity, such as tumor-initiating and metastatic properties and drug sensitivity. MATERIALS AND METHODS: We found that a self-floating cell (SFC) culture enriches a drug-resistant subpopulation in a HER2-positive breast cancer cell line. SFCs were analyzed for cancer stem cell markers, gene expression profiles, and sensitivity for anticancer drugs. RESULTS: SFCs expressed cancer stem cell markers, such as aldehyde dehydrogenase (ALDH) activity and elevated HER2 autophosphorylation...
April 2017: Anticancer Research
https://www.readbyqxmd.com/read/28346042/decreased-expression-of-aldh5a1-predicts-prognosis-in-patients-with-ovarian-cancer
#16
Xun Tian, Yingyan Han, Lan Yu, Bo Luo, Zheng Hu, Xiong Li, Zongyuan Yang, Xin Wang, Wanqiu Huang, Hui Wang, Qinghua Zhang, Ding Ma
Aldehyde dehydrogenase 5 family, member A1 (ALDH5A1) belongs to the superfamily of aldehyde dehydrogenases (ALDHs). However, the prognostic value of ALDH5A1 in ovarian cancer remains unclear. The aim of this study was to explore the relationship between ALDH5A1 and the prognosis of patients with ovarian cancer (OC). We compared the expression of ALDH5A1 in OC to that innormal controls, using GSE40595 profiling data. Tissue microarray analysis was conducted for192 OC patients, 14 adjacent normal ovary tissues, and 2 normal ovary tissues...
March 27, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/28344640/the-effects-of-antiviral-treatment-on-breast-cancer-cell-line
#17
Madina Shaimerdenova, Orynbassar Karapina, Damel Mektepbayeva, Kenneth Alibek, Dana Akilbekova
BACKGROUND: Recent studies have revealed the positive antiproliferative and cytotoxic effects of antiviral agents in cancer treatment. The real effect of adjuvant antiviral therapy is still controversial due to the lack of studies in biochemical mechanisms. Here, we studied the effect of the antiviral agent acyclovir on morphometric and migratory features of the MCF7 breast cancer cell line. Molecular levels of various proteins have also been examined. METHODS: To evaluate and assess the effect of antiviral treatment on morphometric, migratory and other cellular characteristics of MCF7 breast cancer cells, the following experiments were performed: (i) MTT assay to measure the viability of MCF7 cells; (ii) Colony formation ability by soft agar assay; (iii) Morphometric characterization by immunofluorescent analysis using confocal microscopy; (iv) wound healing and transwell membrane assays to evaluate migration and invasion capacity of the cells; (v) ELISA colorimetric assays to assess expression levels of caspase-3, E-cadherin and enzymatic activity of aldehyde dehydrogenase (ALDH)...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28341962/tumour-suppressor-ep300-a-modulator-of-paclitaxel-resistance-and-stemness-is-downregulated-in-metaplastic-breast-cancer
#18
Muhammad Asaduzzaman, Stephanie Constantinou, Haoxiang Min, John Gallon, Meng-Lay Lin, Poonam Singh, Selina Raguz, Simak Ali, Sami Shousha, R Charles Coombes, Eric W-F Lam, Yunhui Hu, Ernesto Yagüe
PURPOSE: We have previously described a novel pathway controlling drug resistance, epithelial-to-mesenchymal transition (EMT) and stemness in breast cancer cells. Upstream in the pathway, three miRs (miR-106b, miR-93 and miR-25) target EP300, a transcriptional activator of E-cadherin. Upregulation of these miRs leads to the downregulation of EP300 and E-cadherin with initiation of an EMT. However, miRs regulate the expression of many genes, and the contribution to EMT by miR targets other than EP300 cannot be ruled out...
March 24, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28340172/repositioning-disulfiram-as-a-radiosensitizer-against-atypical-teratoid-rhabdoid-tumor
#19
Young Eun Lee, Seung Ah Choi, Pil Ae Kwack, Hak Jae Kim, Il Han Kim, Kyu-Chang Wang, Ji Hoon Phi, Ji Yeoun Lee, Sangjoon Chong, Sung-Hye Park, Kyung Duk Park, Do Won Hwang, Kyeung Min Joo, Seung-Ki Kim
Background.: Atypical teratoid/rhabdoid tumor (AT/RT) is one of the most common malignant brain tumors in infants. Although cancer stem cells of AT/RT express aldehyde dehydrogenase (ALDH), effective chemotherapies against AT/RT have not been established. Here, we examined radiosensitizing effects of disulfiram (DSF), an irreversible inhibitor of ALDH against AT/RT for a novel therapeutic method. Methods.: Patient-derived primary cultured AT/RT cells (SNU.AT/RT-5 and SNU...
March 17, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28321046/tobacco-nitrosamine-nnk-increases-aldh-positive-cells-via-ros-wnt-signaling-pathway-in-a549-human-lung-cancer-cells
#20
Naoya Hirata, Shigeru Yamada, Yuko Sekino, Yasunari Kanda
Epidemiological studies suggest that lung cancer, which is a major cause of cancer death, has a critical association with cigarette smoking. Tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in cigarette smoke is a major risk factor for carcinogenesis. However, the mechanisms by which NNK promotes cancer development have not been fully elucidated. Growing evidence suggests that lung cancer originates from cancer stem cells (CSCs), which are a minor population of lung cancer cells...
2017: Journal of Toxicological Sciences
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