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miRNAS AND POU5F1, SOX2 GENES AS POTENTIAL PARTICLES FOR INCORPORATION
INTO POLYSACCHARIDE
Aisina D.E., Akimniyazova A.N., Shokatayeva D.H., Talipova A.B., Kuli Zh.T.
al-Farabi Kazakh National University
dana.aisina03@gmail.com
POU5F1 and
SOX2 genes encode the transcription factors that are involved in oncogenesis, including
the development of breast cancer. In particular,
SOX2 inhibits cell proliferation and metastasis, promotes
apoptosis. For delivery to the tumor
POU5F1 and
SOX2 genes included in negatively charged plasmid
mixture, used in the positively charged cationic polysaccharide self-organizing into nanosized particles,
named as CPEPS-OS-miR nanoparticles, which can be applied in oncological medicine. In these particles
included miR302-367, which can bind to mRNA genes. To test the effectiveness of microRNAs, we detected
microRNAs that can suppress the expression of
POU5F1 and
SOX2 genes.
The nucleotide sequences of mRNAs of human genes were downloaded from NCBI GenBank
(http://www.ncbi.nlm.nih.gov). Nucleotide sequences of human 2565 miRNAs were downloaded from the
miRBase database (http://mirbase.org). miRNAs binding sites were predicted using the MirTarget program.
There are ten miRNAs bind with mRNAs of
PO5F1 gene from 512 nt to 625 nt position with binding
energy of -91 kJ/mole to -119 kJ/mole in 5’UTR, another cluster of miRNAs with mRNAs of
PO5F1 have
been in position from 1000 nt to 1433 nt in 5’UTR. Notably, miRNAs with mRNAs of
SOX2 gene have
binding sites in 3’UTR, and have positions from 1672 nt to 1681 nt, creating a cluster for eight different
miRNAs with binding energy of -98 kJ/mole to -108 kJ/mole, and they have score from 85% to 89%. The
obtained results indicate that mRNAs of
POU5F1 and
SOX2 genes can bind to miRNAs in different degrees.
The largest number of miRNAs binding sites was shown for mRNA of
SOX2 gene, than for
POU5F1.
miR302-367 do not interact with mRNAs of
POU5F1 and
SOX2 genes. Based on the obtained data, miRNAs
and mRNAs of
POU5F1 and
SOX2 genes associations have been identified, that allows them to be used as
potential particles for incorporation into polysaccharide for further use in cancer medicine.
Scientific adviser: Doctor of biological sciences, Professor A.T. Ivashchenko
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