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Published on: December 15, 2010
Docetaxel-loaded lipid microbubbles combined with ultrasound-triggered microbubble destruction for targeted tumor
Yue Zhang1, Ruijiao Chang1, Muqiong Li2
1Department of Ultrasound, Xijing Hospital.
Background:
Efficient and targeted delivery of cytotoxic drugs is still a challenge in the fight against cancer. Ultrasound-targeted destruction of cytotoxic drug-loaded lipid microbubbles (LMs) might be a promising method. This study aimed to explore the antitumor effects of docetaxel-loaded LM (DLLM) combined with ultrasound-targeted microbubble destruction (UTMD) on liver cancer.
Materials And Methods:
DLLMs were made by a mechanical vibration technique. The effects of docetaxel, DLLM alone, and DLLM + UTMD on cell viability and cell proliferation (Cell Counting Kit-8 assay) of MHCC-H cells and HepG2 cells were tested. The effects on cell cycle (flow cytometry) and apoptosis (flow cytometry and immunoblotting) of MHCC-H cells were tested. Solid fast-growing tumor mouse models were established and were randomized to blank LM + UTMD (controls) or DLLM + UTMD. Tumor volume was compared between the two groups.
Results:
DLLMs had an 18%±7% drug-loading capacity, an 80%±3% encapsulation efficiency, and a mean particle size of 2,845 nm (75% range 1,527-5,534 nm). Compared to the other groups, DLLM + UTMD decreased the proliferation and increased the apoptosis of MHCC-H cells. DLLM + UTMD resulted in the inhibition of a higher proportion of cells in the G1 phase. Compared to the control group, the tumor volume in mice receiving DLLM + UTMD was smaller.
Conclusion:
DLLM + UTMD can increase the proportion of cells arrested in the G1 phase, decrease tumor cell proliferation, and induce MHCC-H cell apoptosis. The growth of solid tumors in mice was inhibited. These results could provide a novel targeted strategy against liver cancer.
Insights
Ultrasound-targeted destruction of docetaxel-loaded lipid microbubbles (DLLM) effectively reduced liver cancer cell proliferation and induced apoptosis. This novel targeted therapy also inhibited tumor growth in mice.
Area of Science:
- Oncology
- Biotechnology
- Nanomedicine
Background:
- Targeted drug delivery remains a significant challenge in cancer therapy.
- Ultrasound-targeted destruction of drug-loaded lipid microbubbles (LMs) presents a promising approach.
- This study investigated the antitumor effects of docetaxel-loaded LMs (DLLM) combined with ultrasound-targeted microbubble destruction (UTMD) in liver cancer.
Purpose of the Study:
- To evaluate the efficacy of DLLM combined with UTMD against liver cancer cells and solid tumors.
- To assess the impact of DLLM + UTMD on cancer cell viability, proliferation, cell cycle, and apoptosis.
- To determine the therapeutic potential of this targeted drug delivery system in a preclinical liver cancer model.
Main Methods:
- Docetaxel-loaded lipid microbubbles (DLLMs) were prepared using mechanical vibration.
- In vitro studies assessed cell viability, proliferation, cell cycle, and apoptosis of liver cancer cells (MHCC-H and HepG2) exposed to docetaxel, DLLM, and DLLM + UTMD.
- In vivo studies utilized solid tumor mouse models, comparing DLLM + UTMD treatment with a control group (blank LM + UTMD).
Main Results:
- DLLMs exhibited a drug-loading capacity of 18%±7% and an encapsulation efficiency of 80%±3%.
- DLLM + UTMD significantly decreased MHCC-H cell proliferation and increased apoptosis compared to other treatment groups.
- DLLM + UTMD treatment led to G1 phase cell cycle arrest and a reduction in tumor volume in mice.
Conclusions:
- DLLM + UTMD effectively inhibits liver cancer cell proliferation and induces apoptosis.
- This combination therapy demonstrates significant antitumor effects by arresting cells in the G1 phase and reducing tumor growth.
- DLLM + UTMD offers a novel and targeted therapeutic strategy for liver cancer treatment.
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