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Retinoblastoma

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https://www.readbyqxmd.com/read/27911838/antagonists-of-growth-hormone-releasing-hormone-receptor-induce-apoptosis-specifically-in-retinoblastoma-cells
#1
Wai Kit Chu, Ka Sin Law, Sun On Chan, Jason Cheuk Sing Yam, Li Jia Chen, Hao Zhang, Herman S Cheung, Norman L Block, Andrew V Schally, Chi Pui Pang
Retinoblastoma (RB) is the most common intraocular cancer in children worldwide. Current treatments mainly involve combinations of chemotherapies, cryotherapies, and laser-based therapies. Severe or late-stage disease may require enucleation or lead to fatality. Recently, RB has been shown to arise from cone precursor cells, which have high MDM2 levels to suppress p53-mediated apoptosis. This finding leads to the hypothesis that restoring apoptosis mechanisms in RBs could specifically kill the cancer cells without affecting other retinal cells...
November 23, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27905679/care-management-for-foreign-children-adolescents-young-adults-with-cancer-and-their-families
#2
Jérémie Gaudichon, Sandra Toscani, Sarah Cohen-Gogo, Juliette Saulpic, Aurore Surun, Oya Sakiroglu, François Doz, Jean Michon, Daniel Orbach
BACKGROUND: Little is known about care management for foreign patients in pediatric oncology in European centers. We aimed to describe care given to children, adolescents, and young adults who came to France for cancer treatment, and to determine whether their geographical origin had an influence on decision making. PROCEDURE: We conducted a monocentric retrospective study on all foreign patients aged 0-25 years and hospitalized for at least one night in Institut Curie (Paris, France) from 2009 to 2013...
December 1, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27904697/inhibitory-effect-of-bufalin-on-retinoblastoma-cells-hxo-rb44-via-the-independent-mitochondrial-and-death-receptor-pathway
#3
Qingfeng Meng, Yan Zhao, LiXin An, Xia Li, Ping Liu
Cinobufacini (Huachansu) is a Chinese medicine prepared from the skin of Bufo bufo gargarizans Cantor (Bufonidae), and has long been used in traditional Chinese medicine. In the present study, the anti-retinoblastoma constituent bufalin obtained from Cinobufacini was investigated. Treatment of human retinoblastoma (HXO-RB44) cells with bufalin induced apoptosis which was accompanied by a decrease in mitochondrial membrane potential, activation of caspase-9, caspase-8 and caspase-3, as well as changes in the expression of cytochrome C...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27903019/osteochondroma-presenting-as-a-calcified-mass-in-the-sellar-region-and-review-of-the-literature
#4
Kazuya Sekiguchi, Satoshi Tsutsumi, Sho Arai, Senshu Nonaka, Takamoto Suzuki, Hisato Ishii, Hiroshi Izumi, Yukimasa Yasumoto
Objective Osteochondroma (OC) is the most common benign bone neoplasm. It infrequently occurs in the cranial cavity as a calcified lesion and very rarely presents in the sellar region. The present study summarizes the knowledge about OCs of the sellar region. Methods We searched the literature search for the clinical appearance of OCs and other calcified pathologies occurring in the sellar region. Results A total of 21 English-language articles published from 1961 to 2015 documented cases of calcified lesions in the sellar region including cerebral aneurysm, chondroid chordoma, chondroma, craniopharyngioma, OC, odontome, osteoma, pituitary adenoma, pituitary stone, Rathke cleft cyst, retinoblastoma, schwannoma, and xanthogranuloma...
November 30, 2016: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/27899256/erlotinib-has-tumor-inhibitory-effect-in-human-retinoblastoma-cells
#5
Yi Shao, Yao Yu, Rongrong Zong, Luowa Quyang, Hui He, Qiong Zhou, Chonggang Pei
AIM: In this study, we explored the effect of erlotinib on the development of retinoblastoma (RB) cells both in vitro and in vivo. METHOD: RB cell lines, Y79 and WERI cells were treated with various concentrations of erlotinib in vitro to assess their cytotoxic profiles. In vitro proliferation, cell-cycle transition and migration were compared between RB cells treated with erlotinib and cells without erlotinib treatment. In in vivo tumorigenicity assay, mice were injected with Y79 cells and orally fed with erlotinib for 28days...
November 26, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27898624/modern-surgical-techniques-in-the-management-of-retinoblastoma
#6
Anthony B Daniels, Shizuo Mukai
No abstract text is available yet for this article.
2017: International Ophthalmology Clinics
https://www.readbyqxmd.com/read/27898619/alternative-chemotherapeutic-agents-for-the-treatment-of-retinoblastoma-using-the-intra-arterial-and-intravitreal-routes-a-path-forward-toward-drug-discovery
#7
Shuai Yuan, Debra L Friedman, Anthony B Daniels
No abstract text is available yet for this article.
2017: International Ophthalmology Clinics
https://www.readbyqxmd.com/read/27898618/evolution-of-chemotherapy-approaches-for-the-treatment-of-intraocular-retinoblastoma-a-comprehensive-review
#8
Shuai Yuan, Debra L Friedman, Anthony B Daniels
No abstract text is available yet for this article.
2017: International Ophthalmology Clinics
https://www.readbyqxmd.com/read/27889745/retinoblastoma-mimicking-orbital-cellulitis
#9
Anirban Das, Usha Singh, Deepak Bansal
No abstract text is available yet for this article.
November 15, 2016: Indian Pediatrics
https://www.readbyqxmd.com/read/27889452/an-rb-ezh2-complex-mediates-silencing-of-repetitive-dna-sequences
#10
Charles A Ishak, Aren E Marshall, Daniel T Passos, Carlee R White, Seung J Kim, Matthew J Cecchini, Sara Ferwati, William A MacDonald, Christopher J Howlett, Ian D Welch, Seth M Rubin, Mellissa R W Mann, Frederick A Dick
Repetitive genomic regions include tandem sequence repeats and interspersed repeats, such as endogenous retroviruses and LINE-1 elements. Repressive heterochromatin domains silence expression of these sequences through mechanisms that remain poorly understood. Here, we present evidence that the retinoblastoma protein (pRB) utilizes a cell-cycle-independent interaction with E2F1 to recruit enhancer of zeste homolog 2 (EZH2) to diverse repeat sequences. These include simple repeats, satellites, LINEs, and endogenous retroviruses as well as transposon fragments...
November 12, 2016: Molecular Cell
https://www.readbyqxmd.com/read/27880996/oxidative-stress-induced-damage-to-paternal-genome-and-impact-of-meditation-and-yoga-can-it-reduce-incidence-of-childhood-cancer
#11
Dada Rima, Basant Kumar Shiv, Chawla Bhavna, Bisht Shilpa, Khan Saima
Background: Sperm DNA damage is underlying aetiology of poor implantation and pregnancy rates but also affects health of offspring and may also result in denovo mutations in germ line and post fertilization. This may result in complex diseases, polygenic disorders and childhood cancers. Childhood cancer like retinoblastoma (RB) is more prevalent in developing countries and the incidence of RB has increased more than three fold in India in the last decade. Recent studies have documented increased incidence of cancers in children born to fathers who consume alcohol in excess and tobacco or who were conceived by assisted conception...
January 9, 2016: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/27879208/generation-of-induced-pluripotent-stem-cells-ipscs-from-a-retinoblastoma-patient-carrying-a-c-2663g-a-mutation-in-rb1-gene
#12
Sicong Zeng, Lvjun Liu, Qi Ouyang, Yan Zhao, Ge Lin, Liang Hu, Wen Li
Skin fibroblasts were obtained from a male patient diagnosed with retinoblastoma (RB) carrying a c.2663G>A mutation in the 25 exon of RB1 gene. RB-iPS cells was generated via delivered four reprogramming factors (OCT4, SOX2, NANOG and LIN28) into these skin fibroblasts. The RB-iPS cells retained the RB1 heterozygous mutation resulted in a truncated RB1 mRNA. Characteristic tests proved that the iPSC line presented typical markers of pluripotency and had the capability to form the three germ layers in vitro...
September 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27874261/outcome-of-intra-arterial-chemotherapy-for-retinoblastoma-and-its-influencing-factors-a-retrospective-study
#13
Miaojuan Chen, Hua Jiang, Jing Zhang, Gang Shen, Yizhou Jiang, Haibo Li, Zhenyin Liu
PURPOSE: Intra-arterial chemotherapy (IAC) has become an essential technique for the treatment of advanced and relapsed intra-ocular retinoblastoma. The outcome of IAC for retinoblastoma is influenced by a variety of medical and non-medical factors. In this study, we aimed to examine the outcome of IAC and determine the factors influencing clinical outcome. METHODS: A total of 107 eyes of 73 patients with retinoblastoma undergoing IAC between January 2011 and April 2013 were retrospectively reviewed for clinical outcomes...
November 22, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27869555/the-influence-of-the-ctip-polymorphism-q418p-on-homologous-recombination-and-predisposition-to-radiation-induced-tumorigenesis-mainly-raml-in-mice
#14
Agata Patel, Jennifer Anderson, Daniela Kraft, Rosemary Finnon, Paul Finnon, Cheryl L Scudamore, Grainne Manning, Robert Bulman, Natalie Brown, Simon Bouffler, Peter O'Neill, Christophe Badie
Exposure to ionizing radiation increases the incidence of acute myeloid leukemia (AML), which has been diagnosed in Japanese atomic bombing survivors, as well as patients treated with radiotherapy. The genetic basis for susceptibility to radiation-induced AML is not well characterized. We previously identified a candidate murine gene for susceptibility to radiation-induced AML (rAML): C-terminal binding protein (CTBP)-interacting protein (CTIP)/retinoblastoma binding protein 8 (RBBP8). This gene is essential for embryonic development, double-strand break (DSB) resection in homologous recombination (HR) and tumor suppression...
November 21, 2016: Radiation Research
https://www.readbyqxmd.com/read/27866875/p53-and-p73-regulate-apoptosis-but-not-cell-cycle-progression-in-mouse-embryonic-stem-cells-upon-dna-damage-and-differentiation
#15
Hanbing He, Cheng Wang, Qian Dai, Fengtian Li, Johann Bergholz, Zhonghan Li, Qintong Li, Zhi-Xiong Xiao
Embryonic stem cells (ESCs) are fast proliferating cells capable of differentiating into all somatic cell types. In somatic cells, it is well documented that p53 is rapidly activated upon DNA damage to arrest the cell cycle and induce apoptosis. In mouse ESCs, p53 can also be functionally activated, but the precise biological consequences are not well characterized. Here, we demonstrated that doxorubicin treatment initially led to cell-cycle arrest at G2/M in ESCs, followed by the occurrence of massive apoptosis...
November 16, 2016: Stem Cell Reports
https://www.readbyqxmd.com/read/27862183/the-antiviral-cytokine-interferon-gamma-restricts-neural-stem-progenitor-cell-proliferation-through-activation-of-stat1-and-modulation-of-retinoblastoma-protein-phosphorylation
#16
Apurva Kulkarni, Taylor J Scully, Lauren A O'Donnell
Neural stem/progenitor cells (NPSCs) express receptors for many inflammatory cytokines, with varying effects on differentiation and proliferation depending on the stage of development and the milieu of inflammatory mediators. In primary neurons and astrocytes, we recently showed that interferon gamma (IFNγ), a potent antiviral cytokine that is required for the control and clearance of many central nervous system (CNS) infections, could differentially affect cell survival and cell cycle progression depending upon the cell type and the profile of activated intracellular signaling molecules...
November 15, 2016: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/27859938/head-and-neck-squamous-cell-carcinoma-ambiguous-human-papillomavirus-status-elevated-p16-and-deleted-retinoblastoma-1
#17
Tim N Beck, Chad H Smith, Douglas B Flieder, Thomas J Galloway, John A Ridge, Erica A Golemis, Ranee Mehra
BACKGROUND: Head and neck squamous cell carcinoma (HNSCC) is potentially curable, but treatment planning remains a challenge. Oncogenic human papillomavirus (HPV)-positive disease is often associated with a good prognosis compared with HPV-negative disease. However, some HPV-positive HNSCC recurs, often with distant metastases and significant treatment resistance. METHODS AND RESULTS: We performed p16 immunohistochemistry (IHC), in situ hybridization (ISH) for high-risk HPV, and comprehensive genomic profiling on oropharyngeal HNSCC with basaloid features and particularly aggressive disease course, noting a rare genetic event: a deleting mutation (exons 5-17) of the tumor suppressor and dominant cell cycle regulator retinoblastoma 1 (RB1)...
November 8, 2016: Head & Neck
https://www.readbyqxmd.com/read/27859428/low-p16-ink4a-expression-in-early-passage-human-prostate-basal-epithelial-cells-enables-immortalization-by-telomerase-expression-alone
#18
Mindy Kim Graham, Lorenzo Principessa, Lizamma Antony, Alan K Meeker, John T Isaacs
BACKGROUND: There are two principal senescence barriers that must be overcome to successfully immortalize primary human epithelial cells in culture, stress-induced senescence, and replicative senescence. The p16(INK4a) /retinoblastoma protein (p16/Rb) pathway mediates stress-induced senescence, and is generally upregulated by primary epithelial cells in response to the artificial conditions from tissue culture. Replicative senescence is associated with telomere loss. Following each round of cell division, telomeres progressively shorten...
November 8, 2016: Prostate
https://www.readbyqxmd.com/read/27856246/reprogramming-of-retinoblastoma-cancer-cells-into-cancer-stem-cells
#19
Fengming Yue, Kanji Hirashima, Daihachiro Tomotsune, Sakiko Takizawa-Shirasawa, Tadayuki Yokoyama, Katsunori Sasaki
Retinoblastoma is the most common intraocular malignancy in pediatric patients. It develops rapidly in the retina and can be fatal if not treated promptly. It has been proposed that a small population of cancer cells, termed cancer stem cells (CSCs), initiate tumorigenesis from immature tissue stem cells or progenitor cells. Reprogramming technology, which can convert mature cells into pluripotent stem cells (iPS), provides the possibility of transducing malignant cancer cells back to CSCs, a type of early stage of cancer...
November 14, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27849562/palbociclib-pd-0332991-a-selective-cdk4-6-inhibitor-restricts-tumour-growth-in-preclinical-models-of-hepatocellular-carcinoma
#20
Julien Bollard, Verónica Miguela, Marina Ruiz de Galarreta, Anu Venkatesh, C Billie Bian, Mark P Roberto, Victoria Tovar, Daniela Sia, Pedro Molina-Sánchez, Christie B Nguyen, Shigeki Nakagawa, Josep M Llovet, Yujin Hoshida, Amaia Lujambio
OBJECTIVE: Advanced hepatocellular carcinoma (HCC) is a lethal malignancy with limited treatment options. Palbociclib, a well-tolerated and selective CDK4/6 inhibitor, has shown promising results in the treatment of retinoblastoma (RB1)-positive breast cancer. RB1 is rarely mutated in HCC, suggesting that palbociclib could potentially be used for HCC therapy. Here, we provide a comprehensive characterisation of the efficacy of palbociclib in multiple preclinical models of HCC. DESIGN: The effects of palbociclib on cell proliferation, cellular senescence and cell death were investigated in a panel of human liver cancer cell lines, in ex vivo human HCC samples, in a genetically engineered mouse model of liver cancer, and in human HCC xenografts in vivo...
November 14, 2016: Gut
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