Title:Geiparvarin Inhibits the Progression of Osteosarcoma by Down-regulating
COX2 Expression
Volume: 23
Issue: 5
Author(s): Bin Wang, Jia Du, Zhiming Zhang, Ping Huang, Shu Chen*Hua Zou*
Affiliation:
- Department of Oncology, Daping Hospital, Army Medical University, Chongqing 400042, China
- Department of Oncology, Daping Hospital, Army Medical University, Chongqing 400042, China
Keywords:
Geiparvarin, osteosarcoma, COX2, angiogenesis, metastasis, apoptosis.
Abstract:
Background: Geiparvarin (GN) is a natural compound isolated from the leaves of Geijera
parviflora and exhibits anticancer activity. Nevertheless, little is known about its anticancer mechanism
and anti-osteosarcoma (OS) effects.
Aim: This study explored whether GN effectively inhibits the growth and metastasis of osteosarcoma
(OS) through a series of in vitro and in vivo experiments.
Methods: Cell proliferation was measured by colony formation and MTT assays, and cell invasion
was detected by Transwell assay. Flow cytometry and caspase-3 activity assays were carried out to
examine cell apoptosis, and western blot analysis was performed to assess protein expression. In the
animal experiments, the changes in relevant indexes were determined by immunohistochemistry and
tumor vessel imaging.
Results: Animal experiments showed that GN treatment significantly inhibited the growth and lung
metastasis of OS, accompanied by increased apoptosis. In addition, GN treatment notably diminished
COX2 expression and angiogenesis in OS. Moreover, COX2 overexpression nullified GN-induced
decline in angiogenesis, growth, and lung metastasis and increased apoptosis in OS. Of note, the body
weight of mice was enhanced after GN treatment, and the pathological examination manifested that
GN treatment did not cause any damage to major organs.
Conclusion: Our data indicated that GN might depress the growth, metastasis, and angiogenesis of
OS by decreasing COX2 expression, suggesting GN is a favorable candidate drug for OS treatment
without side effects. Hence, it can be concluded that geiparvarin inhibits OS progression by reducing
COX2 expression.