

FOLLOWUS
1.Key Laboratory of Marine Genetics and Breeding (Ministry of Education), College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
2.MOE Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, College of Fisheries and Life Science, Hainan Tropical Ocean University, Sanya 572022, China
3.Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
Xianghai TANG, txianghai@ouc.edu.cn
Yunxiang MAO, yxmao@hntou.edu.cn
纸质出版:2022-03
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Cytological and transcriptional analysis reveal phosphatidylinositol signaling pathway plays key role in mitotic division of
Yunke ZHU, Xinran WANG, Bin SUN, et al. Cytological and transcriptional analysis reveal phosphatidylinositol signaling pathway plays key role in mitotic division of
Cytological and transcriptional analysis reveal phosphatidylinositol signaling pathway plays key role in mitotic division of
Yunke ZHU, Xinran WANG, Bin SUN, et al. Cytological and transcriptional analysis reveal phosphatidylinositol signaling pathway plays key role in mitotic division of
The phosphatidylinositol (PI) signaling system
a central regulator of eukaryotic metabolism
is widely found in eukaryotes for regulating a variety of cell activities. Most of the genes in the PI signaling system were found conserved in
Pyropia yezoensis
. In this experiment
wortmannin was used as an inhibitor to inhibit the activity of phosphatidylinositol-3 kinase (
PI3K
)
an important regulator of the PI signaling system. After wortmannin treatment
the mitotic division of
P. yezoensis
was significantly inhibited in a dose-dependent manner
and the mitotic division percentage was reduced by 68.1% and 91.9% in the 5-and 10-µmol/L groups
respectively. When thalli were treated with wortmannin
the levels of reactive oxygen species (ROS) were significantly decreased. Furthermore
the expression level of
PI3K
was inhibited and the expression levels of downstream genes regulated by
PI3K
was significantly changed. In the
PI3K-AGC
signaling pathway
the expression levels of Serine/threonine protein kinase (
AGC
) and cyclin-dependent kinases A (
CDKA
) were downregulated
while WEE1 kinase gene (
WEE1
) was upregulated. Three nicotinamide adenine dinucleotide phosphate (NADPH) oxidase genes were downregulated after wortmannin treatment. These results indicate that the PI signaling system plays an important role in the regulation of cell activity in
P. yezoensis
. It was speculated that the growth and development of
P. yezoensis
might be regulated by
P. yezoensis PI3K
which promoted the expression of the
AGC
gene and further regulates the expression of downstream
WEE1
and
CDKA
genes to advance mitotic division
and also promoted the expression level of NADPH oxidase that regulates ROS homeostasis.
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