TY  - JOUR
A1  - Reimann, Hauke
A1  - Stopper, Helga
A1  - Hintzsche, Henning
T1  - Long-term fate of etoposide-induced micronuclei and micronucleated cells in Hela-H2B-GFP cells
JF  - Archives of Toxicology
N2  - Micronuclei are small nuclear cellular structures containing whole chromosomes or chromosomal fragments. While there is a lot of information available about the origin and formation of micronuclei, less is known about the fate of micronuclei and micronucleated cells. Possible fates include extrusion, degradation, reincorporation and persistence. Live cell imaging was performed to quantitatively analyse the fates of micronuclei and micronucleated cells occurring in vitro. Imaging was conducted for up to 96 h in HeLa-H2B-GFP cells treated with 0.5, 1 and 2 µg/ml etoposide. While a minority of micronuclei was reincorporated into the main nucleus during mitosis, the majority of micronuclei persisted without any alterations. Degradation and extrusion were observed rarely or never. The presence of micronuclei affected the proliferation of the daughter cells and also had an influence on cell death rates. Mitotic errors were found to be clearly increased in micronucleus-containing cells. The results show that micronuclei and micronucleated cells can, although delayed in cell cycle, sustain for multiple divisions.
KW  - micronuclei
KW  - cell fate
KW  - etoposide
KW  - live imaging
KW  - DNA damage
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-235039
SN  - 0340-5761
VL  - 94
ER  - 
TY  - JOUR
A1  - Tsai, Yu-Chen
A1  - Grimm, Stefan
A1  - Chao, Ju-Lan
A1  - Wang, Shih-Chin
A1  - Hofmeyer, Kerstin
A1  - Shen, Jie
A1  - Eichinger, Fred
A1  - Michalopoulou, Theoni
A1  - Yao, Chi-Kuang
A1  - Chang, Chih-Hsuan
A1  - Lin, Shih-Han
A1  - Sun, Y. Henry
A1  - Pflugfelder, Gert O.
T1  - Optomotor-blind negatively regulates Drosophila eye development by blocking Jak/STAT signaling
JF  - PLoS ONE
N2  - Organ formation requires a delicate balance of positive and negative regulators. In Drosophila eye development, wingless (wg) is expressed at the lateral margins of the eye disc and serves to block retinal development. The T-box gene optomotor-blind (omb) is expressed in a similar pattern and is regulated by Wg. Omb mediates part of Wg activity in blocking eye development. Omb exerts its function primarily by blocking cell proliferation. These effects occur predominantly in the ventral margin. Our results suggest that the primary effect of Omb is the blocking of Jak/STAT signaling by repressing transcription of upd which encodes the Jak receptor ligand Unpaired.
KW  - morphogenetic furrow progression
KW  - cell fate
KW  - compartment boundary
KW  - reporter gene
KW  - compound eye
KW  - gene expression
KW  - retinal differentiation
KW  - acts downstream
KW  - imaginal disk
KW  - glial cells
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-143577
VL  - 10
IS  - 3
ER  -