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Cancer stem cell

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https://www.readbyqxmd.com/read/29141221/chemotherapy-induced-depletion-of-oct4-positive-cancer-stem-cells-in-a-mouse-model-of-malignant-testicular-cancer
#1
Timothy M Pierpont, Amy M Lyndaker, Claire M Anderson, Qiming Jin, Elizabeth S Moore, Jamie L Roden, Alicia Braxton, Lina Bagepalli, Nandita Kataria, Hilary Zhaoxu Hu, Jason Garness, Matthew S Cook, Blanche Capel, Donald H Schlafer, Teresa Southard, Robert S Weiss
Testicular germ cell tumors (TGCTs) are among the most responsive solid cancers to conventional chemotherapy. To elucidate the underlying mechanisms, we developed a mouse TGCT model featuring germ cell-specific Kras activation and Pten inactivation. The resulting mice developed malignant, metastatic TGCTs composed of teratoma and embryonal carcinoma, the latter of which exhibited stem cell characteristics, including expression of the pluripotency factor OCT4. Consistent with epidemiological data linking human testicular cancer risk to in utero exposures, embryonic germ cells were susceptible to malignant transformation, whereas adult germ cells underwent apoptosis in response to the same oncogenic events...
November 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/29140298/enhancement-of-bone-marrow-derived-mesenchymal-stem-cell-osteogenesis-and-new-bone-formation-in-rats-by-obtusilactone-a
#2
Yi-Hsiung Lin, Chung-Yi Chen, Liang-Yin Chou, Chung-Hwan Chen, Lin Kang, Chau-Zen Wang
The natural pure compound obtusilactone A (OA) was identified in Cinnamomum kotoense Kanehira & Sasaki, and shows effective anti-cancer activity. We studied the effect of OA on osteogenesis of bone marrow-derived mesenchymal stem cells (BMSCs). OA possesses biocompatibility, stimulates Alkaline Phosphatase (ALP) activity and facilitates mineralization of BMSCs. Expression of osteogenesis markers BMP2, Runx2, Collagen I, and Osteocalcin was enhanced in OA-treated BMSCs. An in vivo rat model with local administration of OA via needle implantation to bone marrow-residing BMSCs revealed that OA increased the new bone formation and trabecular bone volume in tibias...
November 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29139122/vaccination-with-human-amniotic-epithelial-cells-confer-effective-protection-in-a-murine-model-of-colon-adenocarcinoma
#3
M Tabatabaei, N Mosaffa, R Ghods, S Nikoo, S Kazemnejad, M Khanmohammadi, E Mirzadeghan, A Mahmoudi, M R Bolouri, R Falak, B Keshavarzi, M Ramezani, A H Zarnani
In spite of being the star of therapeutic strategies for cancer treatment, the results of immunotherapeutic approaches are still far from expectations. In this regard, primary prevention of cancer using prophylactic cancer vaccines has gained considerable attention. The immunologic similarities between cancer development and placentation have helped researchers to unravel molecular mechanisms responsible for carcinogenesis and to take advantage of stem cells from reproductive organs to elicit robust anti-cancer immune responses...
November 15, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29139089/cancer-stem-cells-in-head-and-neck-carcinomas-identification-and-possible-therapeutic-implications
#4
Elize Wolmarans, Sonja C Boy, Sulette Nel, Anne E Mercier, Michael Sean Pepper
The recurrence and/or lack of response of certain tumors to radio- and chemotherapy has been attributed to a small subpopulation of cells termed cancer stem cells (CSCs). CSCs have been identified in many tumors (including solid and hematological tumors). CSCs are characterized by their capacity for self-renewal, their ability to introduce heterogeneity within a tumor mass and its metastases, genomic instability, and their insensitivity to both radiation and chemotherapy. The latter highlights the clinical importance of studying this subpopulation since their resistance to traditional treatments may lead to metastatic disease and/or tumor relapse...
November 15, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29139088/contrasting-views-on-the-role-of-mesenchymal-stromal-stem-cells-in-tumour-growth-a-systematic-review-of-experimental-design
#5
Ahmed Kolade Oloyo, Melvin Anyasi Ambele, Michael Sean Pepper
The effect of mesenchymal stromal/stem cells (MSCs) on tumour growth remains controversial. Experimental evidence supports both an inhibitory and a stimulatory effect. We have assessed factors responsible for the contrasting effects of MSCs on tumour growth by doing a meta-analysis of existing literature between 2000 and May 2017. We assessed 183 original research articles comprising 338 experiments. We considered (a) in vivo and in vitro experiments, (b) whether in vivo studies were syngeneic or xenogeneic, and (c) if animals were immune competent or deficient...
November 15, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29139087/the-role-of-reactive-oxygen-species-in-adipogenic-differentiation
#6
Danielle de Villiers, Marnie Potgieter, Melvin A Ambele, Ladislaus Adam, Chrisna Durandt, Michael S Pepper
Interest in reactive oxygen species and adipocyte differentiation/adipose tissue function is steadily increasing. This is due in part to a search for alternative avenues for combating obesity, which results from the excess accumulation of adipose tissue. Obesity is a major risk factor for complex disorders such as cancer, type 2 diabetes, and cardiovascular diseases. The ability of mesenchymal stromal/stem cells (MSCs) to differentiate into adipocytes is often used as a model for studying adipogenesis in vitro...
November 15, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29138851/nrp1-positive-lung-cancer-cells-possess-tumor-initiating-properties
#7
Luis E Jimenez-Hernandez, Karla Vazquez-Santillan, Rosario Castro-Oropeza, Gustavo Martinez-Ruiz, Laura Muñoz-Galindo, Carolina Gonzalez-Torres, Carlo C Cortes-Gonzalez, Georgina Victoria-Acosta, Jorge Melendez-Zajgla, Vilma Maldonado
Tumor-initiating cells possess the capacity for self-renewal and to create heterogeneous cell lineages within a tumor. Therefore, the identification and isolation of cancer stem cells is an essential step in the analysis of their biology. The aim of the present study was to determine whether the cell surface protein neuropilin 1 (NRP1) can be used as a biomarker of stem-like cells in lung cancer tumors. For this purpose, NRP1-negative (NRP1-) and NRP1-positive (NRP1+) cell subpopulations from two lung cancer cell lines were sorted by flow cytometry...
November 9, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29138811/high-expression-of-mage-a9-contributes-to-stemness-and-malignancy-of-human-hepatocellular-carcinoma
#8
Youping Wei, Yanqin Wang, Jing Gong, Lihua Rao, Zhiwei Wu, Teng Nie, Dongling Shi, Liming Zhang
MAGE-A9, a well-characterized cancer testis antigen (CTA), belongs to a member of melanoma antigen gene (MAGE) family. In human malignancies, aberrant expression of MAGE genes correlated with poor clinical prognosis, increased tumor growth, metastases, and enrichment in stem cell populations of certain cancers. Cancer stem cells (CSCs) have been proposed to contribute to the major malignant phenotypes of liver cancer, including recurrence, metastasis and chemoresistance. However, expression and potential role of MAGE-A9 in liver cancer stem cells (LCSCs) still remain unclear...
November 9, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29138559/human-mesenchymal-stem-cell-derived-iron-oxide-exosomes-allow-targeted-ablation-of-tumor-cells-via-magnetic-hyperthermia
#9
U Altanerova, M Babincova, P Babinec, K Benejova, J Jakubechova, V Altanerova, M Zduriencikova, V Repiska, C Altaner
Magnetic hyperthermia, or the heating of tissues using magnetic materials, is a promising approach for treating cancer. We found that human mesenchymal stem cells (MSCs) isolated from various tissues and MSCs expressing the yeast cytosine deaminase∷uracil phosphoribosyl transferase suicide fusion gene (yCD∷UPRT) can be labeled with Venofer, an iron oxide carbohydrate nanoparticle. Venofer labeling did not affect cell proliferation or the ability to home to tumors. All Venofer-labeled MSCs released exosomes that contained iron oxide...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29138265/targeted-delivery-of-stat-3-modulator-to-breast-cancer-stem-like-cells-down-regulates-a-series-of-stem-ness-genes
#10
Santosh K Misra, Arun De, Dipanjan Pan
Cancer stem cells are known to be controlled by pathways that are dormant in normal adult cells, e.g. PTEN, which is a negative regulator of transcription factor STAT3. STAT3 regulates genes that are involved in stem cell self-renewal and thus represents a novel therapeutic target of enormous clinical significance. Studies on breast cancer stem cells (BCSCs) have been also significantly correlated with STATs. We describe here for the first time a novel strategy to selectively target CSCs and to induce downregulation of STAT3 downstream target genes reducing expression of series of 'stem-ness genes' in treated tumors...
November 14, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29138005/distinct-hypoxic-regulation-of-preadipocyte-factor-1-pref-1-in-preadipocytes-and-mature-adipocytes
#11
Yunwon Moon, Seongyeol Lee, Bongju Park, Hyunsung Park
Preadipocyte factor-1 (Pref-1) is a secretory soluble protein, which exerts pleiotropic effects on maintenance of cancer stem cell characteristics and commitment of mesenchymal stem cell lineages by inhibiting adipogenesis. Observations that obesity renders the microenvironment of adipose tissues hypoxic and that hypoxia inhibits adipogenesis lead us to investigate whether hypoxia increases the expression of anti-adipogenic Pref-1 in preadipocytes, mature adipocytes, and adipose tissues from obese mouse. In 3T3-L1 preadipocytes, hypoxia induces Pref-1 by a hypoxia-inducible factor 1 (HIF-1)-dependent mechanism accompanied by increase in the levels of the active histone mark, acetylated H3K9/14 (H3K9/14Ac)...
November 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29137951/triple-negative-breast-cancer-stem-cells-and-african-ancestry
#12
REVIEW
Evelyn Jiagge, Dhananjay Chitale, Lisa A Newman
Triple-negative breast cancers (TNBC) are more common among African ancestry populations, such as African Americans and western, sub-Saharan Africans, compared to European ancestry populations. This phenotype prevalence contributes to breast cancer outcome disparities between African Americans and Caucasian Americans. Breast cancer stem cells represent the tumor subpopulation responsible for metastatic virulence and ongoing research seeks to characterize the extent to which TNBC versus non-TNBC stem cells may differ...
November 11, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29137675/human-hyaluronic-acid-synthase-1-promotes-malignant-transformation-via-epithelial-to-mesenchymal-transition-micronucleation-and-centrosome-abnormalities
#13
Nguyet Nguyen, Awanit Kumar, Simi Chacko, Rodney J Ouellette, Anirban Ghosh
BACKGROUND: Human hyaluronic acid (HA) molecules are synthesized by three membrane spanning Hyaluronic Acid Synthases (HAS1, HAS2 and HAS3). Of the three, HAS1 is found to be localized more into the cytoplasmic space where it synthesizes intracellular HA. HA is a ubiquitous glycosaminoglycan, mainly present in the extracellular matrix (ECM) and on the cell surface, but are also detected intracellularly. Accumulation of HA in cancer cells, the cancer-surrounding stroma, and ECM is generally considered an independent prognostic factors for patients...
November 14, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/29137422/pkm2-can-enhance-pluripotency-in-escs-and-promote-somatic-cell-reprogramming-to-ipscs
#14
Shengtang Qin, Danli Yang, Kang Chen, Haolan Li, Liqiang Zhang, Yuan Li, Rongrong Le, Xiaojie Li, Shaorong Gao, Lan Kang
Aerobic glycolysis is one of the most important common characteristics in both cancer cells and stem cells. Metabolism switch has been discovered as an important early event in the process of reprogramming somatic cells to induced pluripotent stem cells (iPSCs). As a rate limiting kinase in glycolysis, Pkm2 has been reported playing critical roles in many tumors, yet its role in stem cells and iPSCs induction is poorly defined. In the present study, we showed that Pkm2 is a predominant pyruvate kinase in embryonic stem cells (ESCs), and its expression increases many pluripotent genes...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137267/tumacrophage-macrophages-transformed-into-tumor-stem-like-cells-by-virulent-genetic-material-from-tumor-cells
#15
Yizhuang Zhang, Na Zhou, Xiuyan Yu, Xuehui Zhang, Shanxin Li, Zhen Lei, Ruobi Hu, Hui Li, Yiqing Mao, Xi Wang, Jinshu Zhang, Yuan Li, Hongyan Guo, David M Irwin, Gang Niu, Huanran Tan
Tumor-associated macrophages are regarded as tumor-enhancers as they have key roles in the subversion of adaptive immunity and in inflammatory circuits that promote tumor progression. Here, we show that cancer cells can subvert macrophages yielding cells that have gained pro-tumor functions. When macrophages isolated from mice or humans are co-cultured with dead cancer cell line cells, induced to undergo apoptosis to mimic chemotherapy, up-regulation of pro-tumor gene expression was identified. Phagocytosis of apoptotic cancer cells by macrophages resulted in their transformation into tumor stem (initiating)-like cells, as indicated by the expression of epithelial markers (e...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137258/aberrantly-activated-cox-2-and-wnt-signaling-interact-to-maintain-cancer-stem-cells-in-glioblastoma
#16
Megan Wu, Jennifer Guan, Chris Li, Simon Gunter, Labeeba Nusrat, Sheena Ng, Karan Dhand, Cindi Morshead, Albert Kim, Sunit Das
Glioblastoma recurrence after aggressive therapy typically occurs within six months, and patients inevitably succumb to their disease. Tumor recurrence is driven by a subpopulation of cancer stem cells in glioblastoma (glioblastoma stem-like cells, GSCs), which exhibit resistance to cytotoxic therapies, compared to their non-stem-cell counterparts. Here, we show that the Cox-2 and Wnt signaling pathways are aberrantly activated in GSCs and interact to maintain the cancer stem cell identity. Cox-2 stimulates GSC self-renewal and proliferation through prostaglandin E2 (PGE2), which in turn activates the Wnt signaling pathway...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137220/stromal-cyclin-d1-promotes-heterotypic-immune-signaling-and-breast-cancer-growth
#17
Timothy G Pestell, Xuanmao Jiao, Mukesh Kumar, Amy R Peck, Marco Prisco, Shengqiong Deng, Zhiping Li, Adam Ertel, Mathew C Casimiro, Xiaoming Ju, Agnese Di Rocco, Gabriele Di Sante, Sanjay Katiyar, Alison Shupp, Michael P Lisanti, Pooja Jain, Kongming Wu, Hallgeir Rui, Douglas C Hooper, Zuoren Yu, Aaron R Goldman, David W Speicher, Lisa Laury-Kleintop, Richard G Pestell
The cyclin D1 gene encodes the regulatory subunit of a holoenzyme that drives cell autonomous cell cycle progression and proliferation. Herein we show cyclin D1 abundance is increased >30-fold in the stromal fibroblasts of patients with invasive breast cancer, associated with poor outcome. Cyclin D1 transformed hTERT human fibroblast to a cancer-associated fibroblast phenotype. Stromal fibroblast expression of cyclin D1 (cyclin D1(Stroma)) in vivo, enhanced breast epithelial cancer tumor growth, restrained apoptosis, and increased autophagy...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137219/functional-characterization-of-lysine-specific-demethylase-2-lsd2-kdm1b-in-breast-cancer-progression
#18
Lin Chen, Shauna N Vasilatos, Ye Qin, Tiffany A Katz, Chunyu Cao, Hao Wu, Nilgun Tasdemir, Kevin M Levine, Steffi Oesterreich, Nancy E Davidson, Yi Huang
Flavin-dependent histone demethylases govern histone H3K4 methylation and act as important chromatin modulators that are extensively involved in regulation of DNA replication, gene transcription, DNA repair, and heterochromatin gene silencing. While the activities of lysine-specific demethylase 1 (LSD1/KDM1A) in facilitating breast cancer progression have been well characterized, the roles of its homolog LSD2 (KDM1B) in breast oncogenesis are relatively less understood. In this study, we showed that LSD2 protein level was significantly elevated in malignant breast cell lines compared with normal breast epithelial cell line...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136834/comparative-proteomics-of-cancer-stem-cells-in-osteosarcoma-using-ultra-high-performance-liquid-chromatography-and-orbitrap-fusion-mass-spectrometer
#19
Zhihui Zhong, Sifeng Mao, Haifeng Lin, Jin-Ming Lin, Jianhua Lin
Osteosarcoma is the most common malignant tumour found in bones, and it has a poor prognosis. For improved therapy, it is significant to have a deep understanding of the proteomics changes in the cancer stem cells (CSCs) of osteosarcoma. Therefore, a comparative proteomics approach based on ultra-high-performance liquid chromatography coupled to an Orbitrap Fusion mass spectrometer (UHPLC-Orbitrap Fusion MS) was established to investigate the key molecular changes between CSCs and non-CSCs in human osteosarcoma HOS cells...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29135607/targeting-the-perivascular-niche-in-brain-tumors
#20
Giorgio Seano
PURPOSE OF REVIEW: Brain tumors are composed of primary tumors of the central nervous system, such us glioblastoma (GBM), and secondary metastatic tumors, such as melanoma, non-Hodgkin lymphoma as well as lung and breast cancers. Brain tumors are highly deadly, and unfortunately not many improvements have been achieved to improve the survival of patients with brain tumors. Chemoradiation resistance is one of the most clinically relevant challenges faced in patients with brain tumors. The perivascular niche is one of the most relevant microenvironment hubs in brain tumors...
November 14, 2017: Current Opinion in Oncology
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