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Updated: Oct 2, 2025
Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?
Published on: June 13, 2014
Versatile Polymer-Initiating Biomineralization for Tumor Blockade Therapy
Zhongyu Jiang1,2, Yang Liu1,2, Run Shi3
1Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022, P. R. China.
Abstract:
Tumor blockade therapy is a promising penetration-independent antitumor modality, which effectively inhibits the exchange of nutrients, oxygen, and information between the tumor and surrounding microenvironments. However, the current blockade therapy strategies have limited antitumor efficacy due to defects of inadequate tumor obstruction, possible side effects, and short duration. For these reasons, a facilely synthesized versatile polymer 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-poly(ethylene glycol)-alendronate (DSPE-PEG-ALN, DPA) is developed to initiate the formation of biomineral shell around osteosarcoma as a potent physical barrier. The DSPE moiety shares a similar chemical structure with the cytomembrane, allowing the membrane insertion of DPA. The bisphosphonic acid groups in ALN attract ions to realize biomineralization around cells. After injection in the invasive osteosarcoma tissue, DPA inserts into the cytomembrane, induces continuous mineral deposition, and ultimately builds a physical barrier around the tumor. Meanwhile, ALN in DPA alleviates bone destruction by suppressing the activity of osteoclasts. Through hindering the exchange of necessary substances, the biomineralization coating inhibits the growth of primary osteosarcoma and pulmonary metastasis simultaneously. Therefore, the multifunctional polymer-initiating blockade therapy provides a promising modality for tumor inhibition in clinics with high efficacy and negligible side effects.
Insights
A novel polymer, DSPE-PEG-ALN (DPA), creates a biomineral shell to block osteosarcoma growth and metastasis. This blockade therapy shows high efficacy with minimal side effects, offering a promising clinical treatment.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Oncology
Background:
- Tumor blockade therapy shows promise for inhibiting tumor growth by restricting nutrient and oxygen exchange.
- Current blockade strategies face limitations including inadequate obstruction, potential side effects, and short-lived effects.
- Osteosarcoma presents a significant challenge due to its invasive nature and propensity for metastasis.
Purpose of the Study:
- To develop a novel polymer-based blockade therapy for osteosarcoma.
- To create a physical barrier around tumors using biomineralization.
- To investigate the efficacy of this approach in inhibiting primary tumor growth and pulmonary metastasis.
Main Methods:
- Synthesis of a versatile polymer, 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-poly(ethylene glycol)-alendronate (DSPE-PEG-ALN, DPA).
- Utilizing the DSPE moiety for cell membrane insertion and the alendronate (ALN) component for ion attraction and biomineralization.
- In situ formation of a biomineral shell around osteosarcoma cells following injection into tumor tissue.
Main Results:
- DSPE-PEG-ALN successfully inserted into cell membranes and initiated continuous mineral deposition, forming a physical tumor barrier.
- The biomineralization effectively inhibited the growth of primary osteosarcoma and reduced pulmonary metastasis.
- Alendronate component demonstrated a secondary benefit by suppressing osteoclast activity, mitigating bone destruction.
Conclusions:
- The developed multifunctional polymer-initiating blockade therapy offers a potent strategy for osteosarcoma treatment.
- Biomineralization-induced physical barriers provide effective tumor obstruction with minimal side effects.
- This approach holds significant potential for clinical translation in cancer therapy.
