scholarly journals Targeting atypical protein kinase C iota reduces viability in glioblastoma stem-like cellsviaa notch signaling mechanism

2016 ◽  
Vol 139 (8) ◽  
pp. 1776-1787 ◽  
Author(s):  
Emma Phillips ◽  
Verena Lang ◽  
Jonathan Bohlen ◽  
Frederic Bethke ◽  
Laura Puccio ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Notch Signaling ◽  
Atypical Protein Kinase C ◽  
Signaling Mechanism ◽  
Atypical Protein Kinase ◽  
Kinase C ◽  
Protein Kinase C Iota

scholarly journals Atypical protein kinase C iota (PKCλ/ι) ensures mammalian development by establishing the maternal–fetal exchange interface

2020 ◽  
Vol 117 (25) ◽  
pp. 14280-14291
Author(s):  
Bhaswati Bhattacharya ◽  
Pratik Home ◽  
Avishek Ganguly ◽  
Soma Ray ◽  
Ananya Ghosh ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Mammalian Development ◽  
Atypical Protein Kinase C ◽  
Differentiation Potential ◽  
Human Trophoblast ◽  
Atypical Protein Kinase ◽  
Kinase C ◽  
Trophoblast Stem ◽  
Protein Kinase C Iota

In utero mammalian development relies on the establishment of the maternal–fetal exchange interface, which ensures transportation of nutrients and gases between the mother and the fetus. This exchange interface is established via development of multinucleated syncytiotrophoblast cells (SynTs) during placentation. In mice, SynTs develop via differentiation of the trophoblast stem cell-like progenitor cells (TSPCs) of the placenta primordium, and in humans, SynTs are developed via differentiation of villous cytotrophoblast (CTB) progenitors. Despite the critical need in pregnancy progression, conserved signaling mechanisms that ensure SynT development are poorly understood. Herein, we show that atypical protein kinase C iota (PKCλ/ι) plays an essential role in establishing the SynT differentiation program in trophoblast progenitors. Loss of PKCλ/ι in the mouse TSPCs abrogates SynT development, leading to embryonic death at approximately embryonic day 9.0 (E9.0). We also show that PKCλ/ι-mediated priming of trophoblast progenitors for SynT differentiation is a conserved event during human placentation. PKCλ/ι is selectively expressed in the first-trimester CTBs of a developing human placenta. Furthermore, loss of PKCλ/ι in CTB-derived human trophoblast stem cells (human TSCs) impairs their SynT differentiation potential both in vitro and after transplantation in immunocompromised mice. Our mechanistic analyses indicate that PKCλ/ι signaling maintains expression of GCM1, GATA2, and PPARγ, which are key transcription factors to instigate SynT differentiation programs in both mouse and human trophoblast progenitors. Our study uncovers a conserved molecular mechanism, in which PKCλ/ι signaling regulates establishment of the maternal–fetal exchange surface by promoting trophoblast progenitor-to-SynT transition during placentation.

scholarly journals Atypical Protein Kinase C iota (PKCλ/ι) Ensures Mammalian Development by Establishing the Maternal-Fetal Exchange Interface

2019 ◽  
Author(s):  
Bhaswati Bhattacharya ◽  
Pratik Home ◽  
Avishek Ganguly ◽  
Soma Ray ◽  
Ananya Ghosh ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Mammalian Development ◽  
Atypical Protein Kinase C ◽  
Differentiation Potential ◽  
Human Trophoblast ◽  
Atypical Protein Kinase ◽  
Kinase C ◽  
Protein Kinase C Iota

AbstractIn utero mammalian development relies on the establishment of the maternal–fetal exchange interface, which ensures transportation of nutrients and gases between the mother and the fetus. This exchange interface is established via development of multinucleated syncytiotrophoblast cells (SynTs) during placentation. In mouse, SynTs develop via differentiation of the trophoblast progenitor cells (TSPCs) of the placenta primordium and in human, SynTs are developed via differentiation of villous cytotrophoblast (CTB) progenitors. Despite the critical need in pregnancy progression, conserved signaling mechanisms that ensure SynT development are poorly understood. Herein, we show that Atypical Protein Kinase C iota (PKCλ/I) plays an essential role in establishing the SynT differentiation program in trophoblast progenitors. Loss of PKCλ/I in the mouse TSPCs abrogates SynT development leading to embryonic death at ~E9.0. We also show that PKCλ/I-mediated priming of trophoblast progenitors for SynT differentiation is a conserved event during human placentation. PKCλ/I is selectively expressed in the first-trimester CTBs of a developing human placenta. Furthermore, loss of PKCλ/I in CTB-derived human trophoblast stem cells (Human TSCs) impairs their SynT differentiation potential both in vitro and after transplantation in immunocompromised mice. Our mechanistic analyses indicate that PKCλ/I signaling maintains expression of GCM1, GATA2, and PPARγ, which are key transcription factors to instigate SynT differentiation programs in both mouse and human trophoblast progenitors. Our study uncovers a conserved molecular mechanism, in which PKCλ/I signaling regulates establishment of the maternal-fetal exchange surface by promoting trophoblast progenitor to SynT transition during placentation.

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