نتایج جستجو برای: mycn

تعداد نتایج: 1228  

Journal: :International journal of cancer 2013
Alexander Schramm Johannes Köster Tobias Marschall Marcel Martin Melanie Schwermer Kathrin Fielitz Gabriele Büchel Matthias Barann Daniela Esser Philip Rosenstiel Sven Rahmann Angelika Eggert Johannes H Schulte

In many cancer types, MYC proteins are known to be master regulators of the RNA-producing machinery. Neuroblastoma is a tumor of early childhood characterized by heterogeneous clinical courses. Amplification of the MYCN oncogene is a marker of poor patient outcome in this disease. Here, we investigated the MYCN-driven transcriptome of 20 primary neuroblastomas with and without MYCN amplificatio...

احسانی, محمد, ارزانیان, محمدتقی, جهانگیرپور, محمدعلی, حمیدیه, امیرعلی, فراهانی, کبری, قریب, آتوسا, وثوق, پروانه, پارسانیا, مسعود, پوپک, بهزاد, یوسفیان, ابوالفضل,

سابقه و هدف: امروزه در سراسر دنیا اولین اقدام پس از تشخیص هیستوپاتولوژیک نوروبلاستوما، بررسی تکثیر ژنومی MYCN بر روی نمونه تومور و بررسی وضعیت امپلیفیکیشن MYCN نقش اصلی را در تعین پیش‌آگهی و استراتژی درمان بیماران مبتلا به نوروبلاستوما دارد. روش بررسی: 75 بیمار شامل، 43 پسر و 32 دختر با میانگین سنی 1/4 سال (124-5/1 ماه) با تشخیص پاتولوژی نوروبلاستوما با استفاده از دو روش کیفی و کمی PCR از...

Journal: :Oncology reports 2009
Susan K Peirce Harry W Findley

MYCN gene amplification is a negative prognostic indicator in neuroblastoma and high level MycN expression in Stage IV neuroblastoma is generally a hallmark of poor patient outcome. However, high level expression of the MycN protein in neuroblastoma cells lacking MYCN amplification suppresses growth and drives apoptosis; this, in part, explains the absence of clinical observations of high level...

Journal: :Cancer research 2010
Lindi Chen Nunzio Iraci Samuele Gherardi Laura D Gamble Katrina M Wood Giovanni Perini John Lunec Deborah A Tweddle

MYCN amplification occurs in approximately 25% of neuroblastomas, where it is associated with rapid tumor progression and poor prognosis. MYCN plays a paradoxical role in driving cellular proliferation and inducing apoptosis. Based on observations of nuclear p53 accumulation in neuroblastoma, we hypothesized that MYCN may regulate p53 in this setting. Immunohistochemical analysis of 82 neurobla...

Journal: :The Journal of clinical investigation 2017
Nan Wu Deshui Jia Breanna Bates Ryan Basom Charles G Eberhart David MacPherson

The most frequent focal alterations in human retinoblastoma are mutations in the tumor-suppressor gene retinoblastoma (RB) and amplification of the oncogene MYCN. Whether MYCN overexpression drives retinoblastoma has not been assessed in model systems. Here, we have shown that Rb inactivation collaborates strongly with MYCN overexpression and leads to retinoblastoma in mice. Overexpression of h...

Journal: :Cancer research 2006
Xao X Tang Huaqing Zhao Bing Kung David Y Kim Sakeenah L Hicks Susan L Cohn Nai-Kong Cheung Robert C Seeger Audrey E Evans Naohiko Ikegaki

MYCN amplification strongly predicts adverse outcome of neuroblastoma. However, the significance of MYCN expression in the clinical and biological behavior of neuroblastoma has been unclear. To address this question, we first examined the expression of MYCN in combination with TrkA (a favorable prognostic indicator of neuroblastoma) in 91 primary neuroblastoma by quantitative reverse transcript...

Journal: :Oncology reports 2013
Pavel Prochazka Jan Hrabeta Ales Vicha Simon Cipro Eva Stejskalova Zdenek Musil Pavel Vodicka Tomas Eckschlager

Neuroblastoma is a tumor accounting for approximately 10% of all childhood malignancies and 50% of all childhood cancer-related deaths. MYCN gene copy number variation represents the most important prognostic factor in neuroblastoma. Prognostic significance of MYCN gene expression is more complicated and may depend on other factors such as MYCN gene copy number status. In the present study, we ...

2016
Chia-Lang Hsu Hsin-Yi Chang Jen-Yun Chang Wen-Ming Hsu Hsuan-Cheng Huang Hsueh-Fen Juan

MYCN, an oncogenic transcription factor of the Myc family, is a major driver of neuroblastoma tumorigenesis. Due to the difficulty in drugging MYCN directly, revealing the molecules in MYCN regulatory networks will help to identify effective therapeutic targets for neuroblastoma therapy. Here we perform ChIP-sequencing and small RNA-sequencing of neuroblastoma cells to determine the MYCN-bindin...

2015
Anneleen Beckers Gert Van Peer Daniel R. Carter Evelien Mets Kristina Althoff Belamy B. Cheung Johannes H. Schulte Pieter Mestdagh Jo Vandesompele Glenn M. Marshall Katleen De Preter Frank Speleman

MYCN is a transcription factor that plays key roles in both normal development and cancer. In neuroblastoma, MYCN acts as a major oncogenic driver through pleiotropic effects regulated by multiple protein encoding genes as well as microRNAs (miRNAs). MYCN activity is tightly controlled at the level of transcription and protein stability through various mechanisms. Like most genes, MYCN is furth...

2017
Kristina Althoff Alexander Schramm

High expression of MYCN can facilitate tumorigenic processes in cancer entities of both, infants and adults. Elevated MYCN levels are often driven by amplification of the MYCN-oncogene and MYCN activity is linked to poor clinical outcome in a variety of cancer types [1]. Among solid tumors of childhood, MYCN amplification is prominently observed in neuroblastoma and medulloblastoma, whereas MYC...

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