Abstract
Aim:
Despite the advances in medicine, cancer remains as one of the leading causes of the
death worldwide. Through our previous study, the Chrysin loaded PGLA/PEG has been
synthesized, and its physico-chemical properties were characterized. The aim of the
present study was to evaluate the Chrysin loaded PGLA/PEG nanoparticle therapeutic
effects on TIMP-1, TIMP-2, MMP-2, MMP-9 and PI3k expression in Mouse 4T1 breast tumor
model.
Materials and methods:
30 mice were enrolled in the current study, and the mice were randomly divided into
3 groups: untreated (n=10), Chrysin treatment (n=10) and Chrysin-loaded PLGA/PEG-based
treatment (n=10). 1064T1 mammary carcinoma cells subcutaneously inoculated in the flank on mice orthotopically.
After the treatments, the primary tumors were isolated from the Mice under anesthesia.
For RNA extraction, the isolated tissues were frozen in −70°C. RNA extraction was
performed by using RNA extraction kit. The expression of TIMP-1, TIMP-2, MMP-2 and
MMP-9 were measured by the real time PCR.
Results:
The study results showed the expression of TIMP-1 and TIMP-2 in Chrysin-loaded PLGA/PEG
treatment groups was higher than Chrysin receiving one. Also, the results showed that
the MMP-9 and MMP-2 expressions were reduced after Chrysin loaded PLGA/PEG treatment.
The reduction of the mentioned genes was greater in Chrysin-loaded PLGA/PEG treatment
group in comparison with Chrysin receiving group.
Conclusion:
According to our present study, expression of the mentioned genes after treatments,
Chrysin; especially, Chrysin-loaded PLGA/PEG could be proposed as a new component
in the cancer therapy for reducing the progression and metastasis.
Key words
chrysin-loaded PLGA/PEG - MMPs - TIMPs - breast cancer