Results 81 to 90 of about 116,563 (263)

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

Down regulation by a low-zinc diet in gene expression of rat prostatic thymidylate synthase and thymidine kinase

Nutrition & Metabolism, 2008
Background Zinc has a wide spectrum of biological activities and its deficiency is related to various abnormalities of cell metabolism. Methods Wistar male rats, at age of 4 weeks, were fed a low-zinc diet for six weeks.
Sassa Shuji, Nemoto Nahoko, Suzuki Satoe, Kudo Hideki, Ishikawa Yuko, Sakamoto Shinobu   +5 more
doaj   +1 more source

Protein transduction: A novel tool for tissue regeneration [PDF]

, 2002
Tissue regeneration in humans is limited and excludes vitals organs like heart and brain. Transformation experiments with oncogenes like T antigen have shown that retrodifferentiation of the respective cells is possible but hard to control. To bypass the
Derer W., Han K., Ho A., Park J., Theodore L.   +4 more
core   +1 more source

The In Vitro Transgenic Rodent Assay in Primary MutaMouse Hepatocytes Compared to the Mammalian Cell Gene Mutation Assay Using the HPRT Gene

Environmental and Molecular Mutagenesis, EarlyView.
ABSTRACT Gene mutations can be detected in mammalian cells in vitro using indicator genes such as the hypoxanthine‐guanine‐phosphoribosyltransferase (HPRT) gene. These assays have been adopted as OECD test guidelines (TG, e.g., OECD TG no. 476) and are used for regulatory purposes.
Alina Göpfert, Kylee Kendra Marie Ronnenberg, Claudia Ruelker, Silke Spang, Naveed Honarvar, Robert Landsiedel   +5 more
wiley   +1 more source

Somatic cell reprogramming for Parkinson's disease treatment

Ibrain, Volume 11, Issue 1, Page 59-73, Spring 2025.
The fundamental purpose of cell reprogramming to treat Parkinson's disease is to generate dopaminergic neurons (DAN) and do transplantation. There are two ways to accomplish this. One method is to induce cells into induced DA neurons (iDAN) directly or to induce cells into induced pluripotent stem cells and ultimately into iDAN in vitro. Another option
Xiaozhuo Li, Kevin Fang, Fengping Wang
wiley   +1 more source

Investigating the functionality of an OCT4-short response element in human induced pluripotent stem cells. [PDF]

, 2016
Pluripotent stem cells offer great therapeutic promise for personalized treatment platforms for numerous injuries, disorders, and diseases. Octamer-binding transcription factor 4 (OCT4) is a key regulatory gene maintaining pluripotency and self-renewal ...
Awe, Jason P, Byrne, James A, Chang, Katherine M, Hermann, Kip J, Lee, Patrick C, Lipshutz, Gerald S, Schoenberg, Benjamen E, Truong, Brian, Vega-Crespo, Agustin, Wu, Lily   +9 more
core   +3 more sources

Noncanonical Nucleotides in the Genome Around the Maternal‐Zygotic Transition

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
In this paper, Kazzazi et al. provide a comprehensive review of the dynamics of nonconventional nucleotides in the genome during early developmental stages, hypothesizing a potential role for these nucleotides in the activation of the zygotic genome. ABSTRACT From the very moment of fertilization and throughout development, the cells of animal embryos ...
Latifa Kazzazy, Dávid Mező, Kinga K. Nagy, Viktória Perey‐Simon, Judit Tóth, Angéla Békési, Beáta Vértessy, Máté Varga   +7 more
wiley   +1 more source

Selection, counterselection, and conditional gene expression for genetic biocontrol of insects

Insect Science, EarlyView.
Selection, counterselection, and conditional expression can be used for sex separation. Selection (S) and counterselection (CS) genes are linked to the sex chromosomes (e.g., the X and Y chromosomes) to confer sex‐specific selection or counterselection based on the presence or absence of the S or CS genes.
Melanie Hempel, Zhijian Tu
wiley   +1 more source

An Adenovirus Vector Containing the Suicide Gene Thymidine Kinase for a Broad Application in Cancer Gene Therapy

Memorias do Instituto Oswaldo Cruz, 2002
Treatment of cancer using gene therapy is based on adding a property to the cell leading to its elimination. One possibility is the use of suicide genes that code for enzymes that transform a pro-drug into a cytotoxic product.
GS Magalhães, AR Muotri, MCN Marchetto, CFM Menck, AM Ventura   +4 more
doaj   +1 more source

Mouse genome engineering uncovers 18 genes dispensable for male reproduction

Andrology, EarlyView.
Abstract Background Male infertility is an intricate multifactorial disease involving the interplay between genetic and environmental factors. Genetic anomalies account for more than 15% of all male infertility cases; however, diagnosing them exhibits enormous challenges due to variable symptomatic presentations and limited knowledge of gene functions.
Hsin‐Yi Chang, Yonggang Lu, Kaito Yamamoto, Jiang Sun, Keisuke Shimada, Yuki Hiradate, Yoshitaka Fujihara, Masahito Ikawa   +7 more
wiley   +1 more source