Several functions have been attributed to HIV-1 Vpr in vitro, including an effect on the reverse-transcription process, nuclear import of the viral DNA, cell cycle arrest at the G2/M transition, induction of apoptosis and transactivation of the HIV-1 LTR (see Ref. [1] for review).
Next, functional experiments showed that ectopic expression of miR-124 in EC cells induced a complex phenotype, namely an inhibition of cell proliferation, block of G1/S phase transition, induction of cell apoptosis, and suppression of cell invasion in vitro, as well as inhibition of tumor growth in vivo.
Moreover, Lim et al. reported that direct conversion into iHeps is a stepwise transition involving the sequential erasure of somatic memory, MET transition, and induction of hepatic cell fate (Lim et al., 2016).
There are some studies that indicated that MSCs have protumorigenic capacity due to their immunosuppression properties, modulation of the epithelial-to-mesenchymal transition, and induction of angiogenesis [ 36].
The coincident late-G1 timing of Rb hyperphosphorylation, MCM loading, and the transition to an mRNA synthesis independent state suggested, paradoxically, that for mammalian cells to assemble preRCs and successfully proceed into S-phase from this transition point, induction of new mRNA synthesis by E2F following 'release' from the Rb protein was unlikely to be required.
Initiation of the G2/M phase transition requires induction of the B-type cyclins (CYCB) and CDKB gene [ 31].
Moreover, stable, long-term expression of a dominant-negative EGFR leads to a mesenchymal to epithelial-like transition and induction of angiogenic tumor growth.
In the HMCLs failing to arrest at the G1/S transition, no induction of p21WAF1/CIP1 was found; instead, p21WAF1/CIP1 protein decreased in RV and p21WAF1/CIP1 was undetectable in BT.
We provide evidence to support this chain of biochemical and cellular events after PFKFB3 inhibition as well as direct verification that p27 itself is required for the simultaneous suppression of G1/S transition and induction of apoptosis caused by PFKFB3 inhibition.
At the onset of colour transition, transcriptional induction of VvF3'H and VvF3'5'H was temporally coordinated with the beginning of anthocyanin biosynthesis, the expression being 2-fold and 50-fold higher, respectively, in red berries versus green berries.
Collectively, these results imply that TGFBI plays a suppressive role in the development of mesothelioma and breast cancer cells, possibly through inhibitions of cell proliferation, delaying of G1-S phase transition, and induction of senescence.
