Angiogenesis or formation of new blood vessels is essential for delivery of cells and materials to the repaired sites; this process is regulated with angiopoeitin and cysteine rich angiogenic inducer.
Epithelial-to-mesenchymal transition (EMT) is an important process in morphogenesis and tissue repair, and this process is often abnormally activated in cancer cells, which will promote their malignant and stem cell characteristics and finally accelerate cell migration [ 49].
The paternal pronucleus in the mouse zygote exhibits high amounts of DNA strand breaks within the critical time frame of global demethylation indicative for an involvement of DNA repair in this process.
We propose that the underlying mechanism for this MMIL phenomenon is microhomology-driven DNA DSB repair as this process is known to generate intron-size deletions, it explains why smaller introns are preferentially lost over larger ones, and it is in line with the observation that intron loss is more frequently found in actively transcribed genes, which are more susceptible to DNA damage.
ZA has also been reported to inhibit the production of hepatocyte growth factor by macrophages [ 57]; given that hepatocyte growth factor supports breast cancer cell invasion, chemoresistance and DNA repair capability, this process could also be involved in modulation of the extra-osseous anti-tumor activity of ZA.
As stated before, DSBs are also repaired by HR, although this process is down regulated in G1 in mammalian cells [11].
The intricacies of the involvement of transcription and repair mechanisms in this process have not been elucidated.
A current model for interstrand cross-link repair suggests that this process is initiated by dual incision around the cross-link of one of the two affected strands.
Cells need to divide in all of us to remain alive, to grow and repair our bodies; sometimes this process goes wrong and the result is cancer.
It concerns, on one hand, the structural biomechanical aspect of the process in question because the ECM components create "scaffolding" (a temporary matrix, granulation tissue, and scar), which is indispensable in the repairing process, providing in this way a structural integrity of the matrix during each stage of the healing process [ 5, 12– 12].
