TY  - JOUR
TI  - <I>Drosophila castor</I> is regulated negatively by the <I>Ubx</I> and <I>abdA</I> genes, but positively by the <I>AbdB</I> gene 
AU  - Ahn, Ju-Hyun
AU  - Yoo, Siuk
AU  - Park, Hyun-Joo
AU  - Jung, Keuk-Il
AU  - Kim, Sang-Hee
AU  - Jeon, Sang-Hak
T2  - The International Journal of Developmental Biology
AB  - The ventral nerve cord (VNC) of Drosophila exhibits significant segmental-specific characteristics during embryonic development. Homeotic genes are expressed over long periods of time and confer identity to the different segments. castor (cas) is one of the genes which are expressed in neuroblasts along the VNC. However, at late embryonic stages, cas transcripts are found only in head and thoracic segments and terminal abdominal segments, while Cas protein lasts longer in all segments. In this study, we investigated the regulation of temporal and spatial expression of cas by the bithorax complex genes. In the loss-of-function mutants of Ultrabithorax (Ubx) and abdominal-A (abdA), cas transcripts were ectopically expressed in abdominal segments at late embryonic stage. However, unlike in Ubx and abdA mutants, in Abdominal-B (AbdB) loss-of-function mutant embryos, cas disappeared in the terminal region. Ectopic Ubx and abdA suppressed cas expression, but ectopic AbdB activated cas expression in most abdominal segments. Moreover, cas was co-expressed in the cells in which AbdB was normally expressed, and overexpressed in the ectopically expressed AbdB embryos. These results suggest that the expression of cas is segment-specifically regulated negatively by Ubx and abdA genes, but positively by the AbdB gene. 
PY  - 2010
DO  - 10.1387/ijdb.093037ja
VL  - 54
IS  - 8-9
SP  - 1251
EP  - 1258
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/093037ja
Y2  - 2024/11/05/17:21:55
ER  -