Results 91 to 100 of about 51,303 (237)

In vitro approach to the study of chronic exposure to low doses of x-rays [PDF]

, 2011
El presente trabajo fue realizado con el fin de estudiar el efecto de dosis bajas y repetidas de radiación sobre dos líneas celulares de la misma especie. Se desarrolló un modelo in vitro para evitar la influencia de los factores de confusión que afectan
Peral Garcia, Pilar, Ponzinibbio, Maria Virginia, Seoane, Analia Isabel   +2 more
core   +1 more source

Discovery of macrocyclic inhibitors of apurinic/apyrimidinic endonuclease 1 [PDF]

, 2019
Apurinic/apyrimidinic endonuclease 1 (APE1) is an essential base excision repair enzyme that is upregulated in a number of cancers, contributes to resistance of tumors treated with DNA-alkylating or -oxidizing agents, and has recently been identified as ...
Beglov, Dmitri, Brown, Lauren E., Chen, Qiujia, Chennamadhavuni, Spandan, Georgiadis, Millie M., He, Hongzhen, Kelley, Mark R., Panek, James S., Porco, John A., Reed, April, Trilles, Richard, Vajda, Sandor, Wireman, Randall   +12 more
core   +6 more sources

Interpretation of in vitro concentration‐response data for risk assessment and regulatory decision‐making: Report from the 2022 IWGT quantitative analysis expert working group meeting

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Quantitative risk assessments of chemicals are routinely performed using in vivo data from rodents; however, there is growing recognition that non‐animal approaches can be human‐relevant alternatives. There is an urgent need to build confidence in non‐animal alternatives given the international support to reduce the use of animals in toxicity ...
Marc A. Beal, Guangchao Chen, Kerry L. Dearfield, Min Gi, Bhaskar Gollapudi, Robert H. Heflich, Katsuyoshi Horibata, Alexandra S. Long, David P. Lovell, Barbara L. Parsons, Stefan Pfuhler, John Wills, Andreas Zeller, George Johnson, Paul A. White   +14 more
wiley   +1 more source

Cytogentic analysis of human dermal fibroblasts (HDFs) in early and late passages using both karyotyping and comet assay techniques [PDF]

, 2013
Human dermal fibroblasts (HDFs) are a potential source of somatic cells for genetic manipulation and tissue engineering. Confirmation of cytogenetic stability of these cells is an essential step for cell nuclear transfer and generation of a suitable and ...
Abdian, Narges., Allahbakhshian-Farsani, Mehdi., Ghasemi-Dehkordi, Payam., Hashemzadeh-Chaleshtori, Morteza., Khosravi-Farsani, Somayeh., Sadeghiani, Marzieh., Saffari-Chaleshtori, Javad.   +6 more
core   +1 more source

Severity of effect considerations regarding the use of mutation as a toxicological endpoint for risk assessment: A report from the 8th International Workshop on Genotoxicity Testing (IWGT)

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Exposure levels without appreciable human health risk may be determined by dividing a point of departure on a dose–response curve (e.g., benchmark dose) by a composite adjustment factor (AF). An “effect severity” AF (ESAF) is employed in some regulatory contexts.
Barbara L. Parsons, Marc A. Beal, Kerry L. Dearfield, George R. Douglas, Min Gi, B. Bhaskar Gollapudi, Robert H. Heflich, Katsuyoshi Horibata, Michelle Kenyon, Alexandra S. Long, David P. Lovell, Anthony M. Lynch, Meagan B. Myers, Stefan Pfuhler, Alisa Vespa, Andreas Zeller, George E. Johnson, Paul A. White   +17 more
wiley   +1 more source

DNA damage in buccal cells in oral PMDs and malignant disorders by comet assay

Brazilian Journal of Oral Sciences, 2019
Aim: DNA damage associated with Oral Squamous Cell Carcinoma (OSCC) and potentially malignant disorders (PMDs) is produced due to carcinogenic agents or increased oxidative stress. Comet assay can assist in early detection and evaluation of the amount of
Garima Rawat, Aadithya B Urs, Anita Chakravarti, Priya Kumar   +3 more
doaj   +1 more source

Early neuronal accumulation of DNA double strand breaks in Alzheimer's disease. [PDF]

, 2019
The maintenance of genomic integrity is essential for normal cellular functions. However, it is difficult to maintain over a lifetime in postmitotic cells such as neurons, in which DNA damage increases with age and is exacerbated by multiple neurological
Adame, Anthony, Evans, Mark D, Mao, Wenjie, Masliah, Eliezer, Mucke, Lennart, Nana, Alissa L, Rissman, Robert A, Seeley, William W, Shanbhag, Niraj M   +8 more
core   +2 more sources

Evaluation of the standard battery of in vitro genotoxicity tests to predict in vivo genotoxicity through mathematical modeling: A report from the 8th International Workshop on Genotoxicity Testing

Environmental and Molecular Mutagenesis, EarlyView.
Abstract In human health risk assessment of chemicals and pharmaceuticals, identification of genotoxicity hazard usually starts with a standard battery of in vitro genotoxicity tests, which is needed to cover all genotoxicity endpoints. The individual tests included in the battery are not designed to pick up all endpoints.
Mirjam Luijten, Jan van Benthem, Takeshi Morita, Raffaella Corvi, Patricia A. Escobar, Yurika Fujita, Jennifer Hemmerich, Naveed Honarvar, David Kirkland, Naoki Koyama, David P. Lovell, Miriam Mathea, Andrew Williams, Stephen Dertinger, Stefan Pfuhler, Jeroen L. A. Pennings   +15 more
wiley   +1 more source

Consensus findings of an International Workshops on Genotoxicity Testing workshop on using transcriptomic biomarkers to predict genotoxicity

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Gene expression biomarkers have the potential to identify genotoxic and non‐genotoxic carcinogens, providing opportunities for integrated testing and reducing animal use. In August 2022, an International Workshops on Genotoxicity Testing (IWGT) workshop was held to critically review current methods to identify genotoxicants using ...
Roland Froetschl, J. Christopher Corton, Henghong Li, Jiri Aubrecht, Scott S. Auerbach, Florian Caiment, Tatyana Y. Doktorova, Yurika Fujita, Danyel Jennen, Naoki Koyama, Matthew J. Meier, Roman Mezencev, Leslie Recio, Takayoshi Suzuki, Carole L. Yauk   +14 more
wiley   +1 more source

Detection of Hypoxia in Human Brain Tumor Xenografts Using a Modified Comet Assay

Neoplasia: An International Journal for Oncology Research, 2003
We used the standard comet assay successfully to generate in vitro dose-response curves under oxic and hypoxic conditions. We then made mixtures of cells that had been irradiated with 3 and 9 Gy of X-rays to simulate two subpopulations in a tumor, but ...
Jingli Wang, Jack Klem, Jan B. Wyrick, Tomoko Ozawa, Erin Cunningham, Jay Golinveaux, Max J. Allen, Kathleen R. Lamborn, Dennis F. Deen   +8 more
doaj   +1 more source