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QTL Mapping and CRISPR/Cas9 Editing to Identify a Drug Resistance Gene in Toxoplasma gondii
Published on: June 22, 2017
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Targeting CD44 by CRISPR-Cas9 in Multi-Drug Resistant Osteosarcoma Cells
Zheng Xiao1,2, Jia Wan1, Ayub Abdulle Nur3
1Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China.
Summary
Cluster of differentiation 44 (CD44) silencing inhibits osteosarcoma progression and enhances drug sensitivity. Targeting CD44 offers a new strategy to improve osteosarcoma treatment outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Drug resistance poses a significant challenge in osteosarcoma treatment.
- Cluster of differentiation 44 (CD44), a hyaluronic acid receptor, is implicated in tumor progression, metastasis, and drug resistance.
Purpose of the Study:
- To investigate the role of CD44 in osteosarcoma cell migration, invasion, proliferation, and drug sensitivity.
- To evaluate the therapeutic potential of targeting CD44 in osteosarcoma.
Main Methods:
- Immunohistochemistry was used to assess CD44 expression in 96 osteosarcoma tissues.
- CRISPR-Cas9 system was employed to silence CD44 in drug-resistant osteosarcoma cell lines (KHOSR2 and U-2OSR2).
- Cell migration, invasion, proliferation, and drug sensitivity were evaluated using wound healing, transwell invasion, 3D cell culture, MTT, and drug uptake assays.
Main Results:
- High CD44 expression correlated with poor survival, metastasis, recurrence, and drug resistance in osteosarcoma patients.
- CD44 silencing significantly inhibited osteosarcoma cell migration and invasion.
- Knockout of CD44 enhanced the sensitivity of osteosarcoma cells to chemotherapy.
Conclusions:
- Silencing CD44 effectively inhibits osteosarcoma cell migration, invasion, and proliferation.
- Targeting CD44 can ameliorate drug resistance in osteosarcoma, suggesting a promising therapeutic strategy.
- CD44 inhibition may improve the prognosis for osteosarcoma patients.
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