TY - JOUR
T1 - Characterization of the roles of DNA polymerases, clamp, and clamp loaders during s-phase progression and cell cycle regulation in the silkworm, bombyx mori
AU - Hino, Masato
AU - Morokuma, Daisuke
AU - Mon, Hiroaki
AU - Lee, Jae Man
AU - Kusakabe, Takahiro
N1 - Publisher Copyright:
© 2016, Journal of Insect Biotechnology and Sericology. All rights reserved.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2016
Y1 - 2016
N2 - DNA replication is one of key event in cell-cycle progression, yet due to their importance and lethality, the chronological phenotypes of DNA synthesis machineries after the depletion of corresponding genes have proved difficult to study. In the present study, mRNAs for three DNA polymerases, a clamp, and three clamp loaders were gradually depleted from cultured silkworm cells by soaking RNAi. Interestingly, the depletion of these DNA synthesis factors had different effects on the cell growth rate and arrest of cell-cycle progression during time-lapse observation. The depletion of DNA polymerases immediately arrested the cell-cycle progression at the S phase, while that of PCNA, a DNA clamp, required more time to slow cell growth and finally induced apoptosis. Surprisingly, silkworm cells continued to undergo several rounds of cell division when the components of clamp loaders were knocked down.
AB - DNA replication is one of key event in cell-cycle progression, yet due to their importance and lethality, the chronological phenotypes of DNA synthesis machineries after the depletion of corresponding genes have proved difficult to study. In the present study, mRNAs for three DNA polymerases, a clamp, and three clamp loaders were gradually depleted from cultured silkworm cells by soaking RNAi. Interestingly, the depletion of these DNA synthesis factors had different effects on the cell growth rate and arrest of cell-cycle progression during time-lapse observation. The depletion of DNA polymerases immediately arrested the cell-cycle progression at the S phase, while that of PCNA, a DNA clamp, required more time to slow cell growth and finally induced apoptosis. Surprisingly, silkworm cells continued to undergo several rounds of cell division when the components of clamp loaders were knocked down.
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U2 - 10.11416/jibs.85.2_021
DO - 10.11416/jibs.85.2_021
M3 - Article
AN - SCOPUS:84991677520
VL - 85
SP - 21
EP - 29
JO - Journal of Insect Biotechnology and Sericology
JF - Journal of Insect Biotechnology and Sericology
SN - 1346-8073
IS - 2
ER -