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M A Ligtenberg, K Witt, F Galvez-Cancino, A Sette, A Lundqvist, A Lladser, R Kiessling
Metastatic melanoma is a fatal disease that responds poorly to classical treatments but can be targeted by T cell-based immunotherapy. Cancer vaccines have the potential to generate long-lasting cytotoxic CD8(+) T cell responses able to eradicate established and disseminated tumors. Vaccination against antigens expressed by tumor cells with enhanced metastatic potential represents a highly attractive strategy to efficiently target deadly metastatic disease. Cripto-1 is frequently over-expressed in human carcinomas and melanomas, but is expressed only at low levels on normal differentiated tissues...
May 2016: Oncoimmunology
Kang-Seo Park, Mark Raffeld, Yong Wha Moon, Liqiang Xi, Caterina Bianco, Trung Pham, Liam C Lee, Tetsuya Mitsudomi, Yasushi Yatabe, Isamu Okamoto, Deepa Subramaniam, Tony Mok, Rafael Rosell, Ji Luo, David S Salomon, Yisong Wang, Giuseppe Giaccone
The majority of non-small cell lung cancer (NSCLC) patients harbor EGFR-activating mutations that can be therapeutically targeted by EGFR tyrosine kinase inhibitors (EGFR-TKI), such as erlotinib and gefitinib. Unfortunately, a subset of patients with EGFR mutations are refractory to EGFR-TKIs. Resistance to EGFR inhibitors reportedly involves SRC activation and induction of epithelial-to-mesenchymal transition (EMT). Here, we have demonstrated that overexpression of CRIPTO1, an EGF-CFC protein family member, renders EGFR-TKI-sensitive and EGFR-mutated NSCLC cells resistant to erlotinib in culture and in murine xenograft models...
July 2014: Journal of Clinical Investigation
Rongrong Wu, Chenming Xu, Fan Jin, Zhou Tan, Bin Gu, Liangbiao Chen, Xing Yao, Ming Zhang
Currently worldwide attention has focused on the derivation of human embryonic stem cells (hESCs) for future therapeutic medicine. However, the majority of existing hESCs are directly or indirectly exposed to non-human materials during their derivation and/or propagation, which greatly restrict their therapeutic potential. Besides the efforts to improve culture systems, the derivation procedure, especially blastocyst manipulation, needs to be optimized. We adopted a non-contact laser-assisted hatching system in combination with sequential culture process to obtain hatched blastocysts as materials for hESC derivation, and derived a hESC line ZJUhES-1 of a Chinese population without exposure to any non-human materials during blastocyst manipulation...
August 2010: Human Cell
Rajarshi Pal, Murali Krishna Mamidi, Anjan Kumar Das, Ramesh Bhonde
In vitro models based on embryonic stem cells (ESC) are highly promising for improvement of predictive toxicology screening in humans. After the successful validation of embryonic stem cell test (EST) in 2001; concerns have been raised on the usage of mouse ESC and also the morphological evaluation of beating cell clusters. This requires specialized skill-sets and is highly prone to misjudgement and false positive results. To overcome these limitations, we undertook the present study incorporating improvisations over the conventional EST...
June 2011: Journal of Cellular Physiology
S C Mizrak, J V Chikhovskaya, H Sadri-Ardekani, S van Daalen, C M Korver, S E Hovingh, H L Roepers-Gajadien, A Raya, K Fluiter, Th M de Reijke, J J M C H de la Rosette, A C Knegt, J C Belmonte, F van der Veen, D G de Rooij, S Repping, A M M van Pelt
BACKGROUND: Given the significant drawbacks of using human embryonic stem (hES) cells for regenerative medicine, the search for alternative sources of multipotent cells is ongoing. Studies in mice have shown that multipotent ES-like cells can be derived from neonatal and adult testis. Here we report the derivation of ES-like cells from adult human testis. METHODS: Testis material was donated for research by four men undergoing bilateral castration as part of prostate cancer treatment...
January 2010: Human Reproduction
Chao Sun, Olivia Orozco, Dian L Olson, Eugene Choi, Ellen Garber, Rich Tizard, Suzanne Szak, Michele Sanicola, John P Carulli
Cripto is a cell surface protein highly expressed in certain solid tumors, and overexpression of Cripto protein is oncogenic. Cripto-1 protein is encoded by CRIPTO1 gene. CRIPTO3, a presumed pseudogene, has an open reading frame with six amino acid differences from Cripto-1. We show that CRIPTO3 mRNA is the CRIPTO message expressed in many cancer samples. A CRIPTO3 SAGE tag was found in several cancer SAGE libraries, while the CRIPTO1 tag was found in ES cell libraries. In vitro experiments indicate both Cripto-1 and Cripto-3 proteins are functional in the Nodal-dependent signal pathway...
December 5, 2008: Biochemical and Biophysical Research Communications
Guillaume Pézeron, Guillaume Lambert, Thomas Dickmeis, Uwe Strähle, Frédéric M Rosa, Philippe Mourrain
The EGF-CFC factor Oep/Cripto1/Frl1 has been implicated in embryogenesis and several human cancers. During vertebrate development, Oep/Cripto1/Frl1 has been shown to act as an essential coreceptor in the TGFbeta/Nodal pathway, which is crucial for germ layer formation. Although studies in cell cultures suggest that Oep/Cripto1/Frl1 is also implicated in other pathways, in vivo it is solely regarded as a Nodal coreceptor. We have found that Rasl11b, a small GTPase belonging to a Ras subfamily of putative tumor suppressor genes, modulates Oep function in zebrafish independently of the Nodal pathway...
2008: PloS One
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