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https://www.readbyqxmd.com/read/29334357/differential-requirements-of-androgen-receptor-in-luminal-progenitors-during-prostate-regeneration-and-tumor-initiation
#1
Chee Wai Chua, Nusrat J Epsi, Eva Y Leung, Shouhong Xuan, Ming Lei, Bo I Li, Sarah K Bergren, Hanina Hibshoosh, Antonina Mitrofanova, Michael M Shen
Master regulatory genes of tissue specification play key roles in stem/progenitor cells and are often important in cancer. In the prostate, androgen receptor (AR) is a master regulator essential for development and tumorigenesis, but its specific functions in prostate stem/progenitor cells have not been elucidated. We have investigated AR function in CARNs (CAstration-Resistant Nkx3.1-expressing cells), a luminal stem/progenitor that functions in prostate regeneration. Using genetically-engineered mouse models and novel prostate epithelial cell lines, we find that progenitor properties of CARNs are largely unaffected by AR deletion, apart from decreased proliferation in vivo...
January 15, 2018: ELife
https://www.readbyqxmd.com/read/29333408/is-long-term-storage-of-cryopreserved-stem-cells-for-hematopoietic-stem-cell-transplantation-a-worthwhile-exercise-in-developing-countries
#2
Santhosh Kumar Devadas, Minal Khairnar, Sumathi S Hiregoudar, Shashank Ojha, Sachin Punatar, Alok Gupta, Anant Gokarn, Pallavi Bhole, Sadhana Kannan, Navin Khattry
Background: Stem cell units (SCUs) that are cryopreserved prior to both autologous and allogeneic hematopoietic stem cell transplants (for donor lymphocyte infusion) remain unused or partially used several times, and become an increased burden to blood banks/SCU repositories. Because of the scarcity of data regarding the duration for which the storage is useful, there is no general consensus regarding disposal of SCUs. Methods: We conducted a retrospective audit of SCU utilization in 435 patients who planned to undergo either autologous stem cell transplantation (auto-SCT) (N=239) or allogeneic stem cell transplantation (allo-SCT) (N=196) at a tertiary cancer care center between November 2007 to January 2015...
December 2017: Blood Research
https://www.readbyqxmd.com/read/29333114/carcinogenesis-induced-by-low-dose-radiation
#3
Igor Piotrowski, Katarzyna Kulcenty, Wiktoria Maria Suchorska, Agnieszka Skrobała, Małgorzata Skórska, Marta Kruszyna-Mochalska, Anna Kowalik, Weronika Jackowiak, Julian Malicki
Background: Although the effects of high dose radiation on human cells and tissues are relatively well defined, there is no consensus regarding the effects of low and very low radiation doses on the organism. Ionizing radiation has been shown to induce gene mutations and chromosome aberrations which are known to be involved in the process of carcinogenesis. The induction of secondary cancers is a challenging long-term side effect in oncologic patients treated with radiation. Medical sources of radiation like intensity modulated radiotherapy used in cancer treatment and computed tomography used in diagnostics, deliver very low doses of radiation to large volumes of healthy tissue, which might contribute to increased cancer rates in long surviving patients and in the general population...
December 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/29333091/in-vitro-and-in-vivo-effects-of-mirna-19b-20a-92a-on-gastric-cancer-stem-cells-and-the-related-mechanism
#4
Qianwen Shao, Jing Xu, Xin Guan, Bing Zhou, Wei Wei, Rong Deng, Dongzhen Li, Xinyu Xu, Haitao Zhu
We aimed to analyze the in vitro and in vivo effects of miRNA-19b/20a/92a on gastric cancer stem cells (GCSCs) and the related mechanism. GCSCs were cultured until adherence and differentiation, and subjected to miRNA microarray analysis to find and to verify miRNA deletion. Cells stably expressing lentivirus carrying miRNA-19b/20a/92a were constructed by transfection. The relationship between miRNA-19b/20a/92a and renewal of GCSCs was studied by the tumor sphere assay, and that between miRNA-19b/20a/92a and their proliferation was explored with MTT and colony formation assays...
2018: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29332467/is-hippocampal-avoidance-during-whole-brain-radiotherapy-risky-for-patients-with-small-cell-lung-cancer-hippocampal-metastasis-rate-and-associated-risk-factors
#5
Esra Korkmaz Kirakli, Ozgur Oztekin
OBJECTIVES: Hippocampal avoidance during whole-brain radiotherapy is performed to prevent neural stem cell injury causing neurocognitive dysfunction. Nevertheless, the estimated risk of metastases in hippocampal avoidance area in small-cell lung cancer is unknown. The current study aimed to characterize the metastatic distribution within the brain relative to the hippocampus, estimate the incidence of hippocampal metastasis in patients with small-cell lung cancer, and identify clinical and radiographic variables that may be associated with the risk of hippocampal avoidance area metastasis...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29332451/psca-rs1045531-polymorphism-and-the-risk-of-prostate-cancer-in-a-chinese-population-undergoing-prostate-biopsy
#6
Xuefeng Zhang, Qin Hu, Ye Chen, Miao Li, Huming Yin, Chenchao Zhou, Gang Li, Jianquan Hou
BACKGROUND AND PURPOSE: This study explored the association between a single-nucleotide polymorphism of prostate stem cell antigen and prostate cancer in Chinese patients undergoing prostate biopsy. MATERIALS AND METHODS: DNA from 416 patients undergoing prostate biopsy was typed for the prostate stem cell antigen rs1045531 single-nucleotide polymorphism. The frequency of the rs1045531 polymorphism in patients with prostate cancer and in patients with benign prostatic hyperplasia was compared...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29332347/genetically-engineered-bone-marrow-derived-mesenchymal-stem-cells-co-expressing-ifn-%C3%AE-and-il-10-inhibit-hepatocellular-carcinoma-by-modulating-mapk-pathway
#7
Hao Wang, Jun Wang, Xiaolei Shi, Yitao Ding
PURPOSE: One of the major challenges in delivering cytokines for the treatment of hepatocellular carcinoma (HCC) is the mode of delivery. This study hypothesized that genetically engineered bone marrow derived mesenchymal stem cells (BMSCs) co-expressing IFN-γ and IL-10 can serve as a potential therapeutic strategy in the treatment of HCC by inhibiting cell proliferation. METHODS: Male Sprague-Dawley rats (n=5, 200-250 g) for BMSCs isolation and Nude/SCID mice (n=35,12-20g) to develop liver cancer xenograft model were used...
November 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29331886/anti-cancer-effects-of-hnha-and-lenvatinib-by-the-suppression-of-emt-mediated-drug-resistance-in-cancer-stem-cells
#8
Yong Sang Lee, Seok-Mo Kim, Bup-Woo Kim, Ho Jin Chang, Soo Young Kim, Cheong Soo Park, Ki Cheong Park, Hang-Seok Chang
Anaplastic thyroid cancer (ATC) constitutes less than 2% of total thyroid cancers but accounts for 20-40% of thyroid cancer-related deaths. Cancer stem cell drug resistance represents a primary factor hindering treatment. This study aimed to develop targeted agents against thyroid malignancy, focusing on individual and synergistic effects of HNHA (histone deacetylase), lenvatinib (FGFR), and sorafenib (tyrosine kinase) inhibitors. Patients with biochemically and histologically proven papillary thyroid cancer (PTC) and ATC were included...
January 11, 2018: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/29331758/caspase-3-mapk-pathways-as-main-regulators-of-the-apoptotic-effect-of-the-phyto-mediated-synthesized-silver-nanoparticle-from-dried-stem-of-eleutherococcus-senticosus-in-human-cancer-cells
#9
Chun Gon Kim, Verónica Castro-Aceituno, Ragavendran Abbai, Hyun A Lee, Shakina Yesmin Simu, Yaxi Han, Joon Hurh, Yeon-Ju Kim, Deok Chun Yang
Siberian ginseng (Eleutherococcus senticosus) was used for the synthesis of an ecofriendly silver nanoparticle (Sg-AgNP), which has exhibited antibacterial, antioxidant effect and lower cytotoxicity to normal cells in comparison to human cancer cells. Although, the potential anticancer activity of Sg-AgNP has not been determined. In this study, two cancer cell lines were used to evaluate the cytotoxicity and apoptotic effect of Sg-AgNP along with the determination of the role of the Caspase-3 / p38 MAPK pathways...
January 9, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29331736/dysfunctional-telomeres-and-hematological-disorders
#10
REVIEW
Elena Fiorini, Andrea Santoni, Simona Colla
Telomere biology disorders, which are characterized by telomerase activity haploinsufficiency and accelerated telomere shortening, most commonly manifest as degenerative diseases. Tissues with high rates of cell turnover, such as those in the hematopoietic system, are particularly vulnerable to defects in telomere maintenance genes that eventually culminate in bone marrow (BM) failure syndromes, in which the BM cannot produce sufficient new blood cells. Here, we review how telomere defects induce degenerative phenotypes across multiple organs, with particular focus on how they impact the hematopoietic stem and progenitor compartment and affect hematopoietic stem cell (HSC) self-renewal and differentiation...
January 4, 2018: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/29331419/the-therapeutic-potential-of-human-adipose-derived-mesenchymal-stem-cells-producing-cxcl10-in-a-mouse-melanoma-lung-metastasis-model
#11
Hamed Mirzaei, Hossein Salehi, Reza Kazemi Oskuee, Ali Mohammadpour, Hamid Reza Mirzaei, Mohammad Reza Sharifi, Reza Salarinia, Hossein Yousofi Darani, Mojgan Mokhtari, Aria Masoudifar, Amirhossein Sahebkar, Rasoul Salehi, Mahmoud Reza Jaafari
Interferon γ-induced protein 10 kDa (IP-10) is a potent chemoattractant and has been suggested to enhance antitumor activity and mediate tumor regression through multiple mechanisms of action. Multiple lines of evidence have indicated that genetically-modified adult stem cells represent a potential source for cell-based cancer therapy. In the current study, we assessed therapeutic potential of human adipose derived mesenchymal stem cells (hADSC) genetically-modified to express IP-10 for the treatment of lung metastasis in an immunocompetent mouse model of metastatic melanoma...
January 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29331418/non-coding-rnas-in-cancer-stem-cells
#12
Huiwen Yan, Pengcheng Bu
Cancer stem cells (CSCs) have been shown to play a key role in tumor initiation, progression, metastasis, and therapy resistance. Despite their potential clinical importance, the mechanism of CSC regulation is not well understood. Recent evidence suggests that different types of non-coding RNAs (ncRNA), such as microRNA (miRNA) and long non-coding RNA (LncRNA), play a role in regulating CSC growth and replication by modulating transcription factors and downstream signaling pathways activated in CSCs. Here, we review the recent major findings about how they affect stem cell quality acquisition and maintenance in CSCs, as well as metastasis and therapy resistance...
January 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29330806/fluorescence-activated-cell-sorting-of-murine-mammary-cancer-stem-like-cell-subpopulations-with-hif-activity
#13
Danielle L Brooks, Tiffany N Seagroves
Fluorescence-activated cell sorting (FACS) is a common method to identify and to isolate subpopulations within a complex mixture of cells based on their light scatter and fluorescent staining profiles. FACS is widely used to enrich for normal tissue and tumor cells that have stem cell potential. Whereas FACS protocols using conventional breast cancer cell lines are relatively routine, additional technical challenges are encountered when sorting for cell populations from freshly digested solid tumors, particularly for use in downstream cancer stem cell (CSC) assays...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330805/in-vitro-assays-of-breast-cancer-stem-cells
#14
Debangshu Samanta, Gregg L Semenza
Aldehyde dehydrogenase and mammosphere assays enable the cost-effective quantification and characterization of cancer stem cells (CSCs) from cancer cell lines as well as cancer tissue. Here we describe the quantification of CSCs in breast cancer cell lines using aldehyde dehydrogenase and mammosphere assays under hypoxic (1% O2) and non-hypoxic (20% O2) culture conditions. Using this method, a significant enrichment of CSCs compared to bulk populations is observed when breast cancer cells are exposed to 1% O2 for 72 h...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330486/new-generation-of-drug-delivery-systems-based-on-ginsenoside-rh2-lysine-and-arginine-treated-highly-porous-graphene-for-improving-anticancer-activity
#15
Hadi Zare-Zardini, Asghar Taheri-Kafrani, Ahmad Amiri, Abdol-Khalegh Bordbar
In this study, Rh2-treated graphene oxide (GO-Rh2), lysine-treated highly porous graphene (Gr-Lys), arginine-treated Gr (Gr-Arg), Rh2-treated Gr-Lys (Gr-Lys-Rh2) and Rh2-treated Gr-Arg (Gr-Arg-Rh2) were synthesized. MTT assay was used for evaluation of cytotoxicity of samples on ovarian cancer (OVCAR3), breast cancer (MDA-MB), Human melanoma (A375) and human mesenchymal stem cells (MSCs) cell lines. The percentage of apoptotic cells was determined by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330434/targeting-melanoma-stem-cells-with-the-vitamin-e-derivative-%C3%AE-tocotrienol
#16
Monica Marzagalli, Roberta Manuela Moretti, Elio Messi, Marina Montagnani Marelli, Fabrizio Fontana, Alessia Anastasia, Maria Rosa Bani, Giangiacomo Beretta, Patrizia Limonta
The prognosis of metastatic melanoma is very poor, due to the development of drug resistance. Cancer stem cells (CSCs) may play a crucial role in this mechanism, contributing to disease relapse. We first characterized CSCs in melanoma cell lines. We observed that A375 (but not BLM) cells are able to form melanospheres and show CSCs traits: expression of the pluripotency markers SOX2 and KLF4, higher invasiveness and tumor formation capability in vivo with respect to parental adherent cells. We also showed that a subpopulation of autofluorescent cells expressing the ABCG2 stem cell marker is present in the A375 spheroid culture...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330298/stemness-is-enhanced-in-gastric-cancer-by-a-set-pp2a-e2f1-axis
#17
Shuhei Enjoji, Ryotaro Yabe, Shunya Tsuji, Kazuhiro Yoshimura, Hideyoshi Kawasaki, Masashi Sakurai, Yusuke Sakai, Hiroko Takenouchi, Shigefumi Yoshino, Shoichi Hazama, Hiroaki Nagano, Hiroko Oshima, Masanobu Oshima, Michael P Vitek, Tetsuya Matsuura, Yoshitaka Hippo, Tatsuya Usui, Takashi Ohama, Koichi Sato
Gastric cancer is the fifth most common malignancy and the third leading cause of cancer-related deaths worldwide. Chemotherapies against gastric cancer often fail, with cancer recurrence due potentially to the persistence of cancer stem cells. This unique subpopulation of cells in tumors possess the ability to self-renew and de-differentiate. These cancer stem cells are critical for initiation, maintenance, metastasis, and relapse of cancers; however, the molecular mechanisms supporting cancer stemness remain largely unknown...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29330293/differential-regulation-of-let-7-by-lin28b-isoform-specific-functions
#18
Rei Mizuno, Priya Chatterji, Sarah F Andres, Kathryn E Hamilton, Lauren Simon, Shawn W Foley, Arjun N Jeganathan, Brian D Gregory, Blair B Madison, Anil K Rustgi
The RNA binding protein LIN28B plays an important role in development, stem cell biology and tumorigenesis. LIN28B has two isoforms: the LIN28B-long and -short isoforms. Although studies have revealed the functions of the LIN28B-long isoform in tumorigenesis, the role of the LIN28B-short isoform remains unclear and represents a major gap in the field. The LIN28B-long and -short isoforms are expressed in a subset of human colorectal cancers (CRCs) and adjacent normal colonic mucosa, respectively. To elucidate the functional and mechanistic aspects of these isoforms, CRC cells (Caco-2 and LoVo) were generated to either express no LIN28B or the -short or -long isoform...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29330263/senescence-associated-chromatin-remodeling-promotes-cancer-stemness
#19
(no author information available yet)
Treatment-induced senescence is associated with stem-cell reprogramming of non-stem cancer cells.
January 12, 2018: Cancer Discovery
https://www.readbyqxmd.com/read/29329589/enhanced-metastatic-capacity-of-breast-cancer-cells-after-interaction-and-hybrid-formation-with-mesenchymal-stroma-stem-cells-msc
#20
Catharina Melzer, Juliane von der Ohe, Ralf Hass
BACKGROUND: Fusion of breast cancer cells with tumor-associated populations of the microenvironment including mesenchymal stroma/stem-like cells (MSC) represents a rare event in cell communication whereby the metastatic capacity of those hybrid cells remains unclear. METHODS: Functional changes were investigated in vitro and in vivo following spontaneous fusion and hybrid cell formation between primary human MSC and human MDA-MB-231 breast cancer cells. Thus, lentiviral eGFP-labeled MSC and breast cancer cells labeled with mcherry resulted in dual-fluorescing hybrid cells after co-culture...
January 5, 2018: Cell Communication and Signaling: CCS
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