Zheng Xiao1,2, Jia Wan1, Ayub Abdulle Nur3, Pencheng Dou1, Henry Mankin3, Tang Liu4,5, Zhengxiao Ouyang1. 1. Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China. 2. Department of Nephrology, The Second Xiangya Hospital, Central South University, Key Laboratory of Kidney Disease and Blood Purification in Hunan, Changsha, China. 3. Department of Orthopedic Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA. 4. Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, Chinaliutang1204@csu.edu.cn. 5. Department of Orthopedic Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USAliutang1204@csu.edu.cn.
Abstract
BACKGROUND/AIMS: Drug resistance is the main difficulty for the current treatment for osteosarcoma. Cluster of differentiation 44 (CD44) is a receptor for hyaluronic acid (HA) and HA-binding has been proven to participate in various biological tumor activities, including tumor progression, metastasis and drug resistance. In this study, we aimed to determine the effects of CD44 on migration, invasion, proliferation, and the drug-sensitivity of osteosarcoma. METHODS: 96 human osteosarcoma tissues from 56 patients were collected to evaluate the expression of CD44 in osteosarcoma tissue by immunohistochemistry. CRISPR-Cas9 system was used to specifically silence CD44 in drug-resistant cell lines (KHOSR2 and U-2OSR2). The migration and invasion activities of cells was demonstrated by wound healing and transwell invasion assay. The proliferation speed of the cells was detected under 3D cell culture condition. Drug resistance of cells was detected by MTT and drug uptake assay. RESULTS: The immunohistochemistry results demonstrated that a high level of CD44 may predict poor survival and higher potential of metastasis, recurrence and drug resistance in patients with osteosarcoma. After knocking-out of CD44 by the CRISPR-Cas9 system, not only the migration and invasion activities of osteosarcoma cells were significantly inhibited, but the drug sensitivity was also enhanced. CONCLUSION: CD44 silencing could inhibit the development of osteosarcoma migration, invasion, proliferation and ameliorate drug resistance to current treatment in osteosarcoma. This study applies new strategy to target CD44, which may improve the prognosis of osteosarcoma.
BACKGROUND/AIMS: Drug resistance is the main difficulty for the current treatment for osteosarcoma. Cluster of differentiation 44 (CD44) is a receptor for hyaluronic acid (HA) and HA-binding has been proven to participate in various biological tumor activities, including tumor progression, metastasis and drug resistance. In this study, we aimed to determine the effects of CD44 on migration, invasion, proliferation, and the drug-sensitivity of osteosarcoma. METHODS: 96 humanosteosarcoma tissues from 56 patients were collected to evaluate the expression of CD44 in osteosarcoma tissue by immunohistochemistry. CRISPR-Cas9 system was used to specifically silence CD44 in drug-resistant cell lines (KHOSR2 and U-2OSR2). The migration and invasion activities of cells was demonstrated by wound healing and transwell invasion assay. The proliferation speed of the cells was detected under 3D cell culture condition. Drug resistance of cells was detected by MTT and drug uptake assay. RESULTS: The immunohistochemistry results demonstrated that a high level of CD44 may predict poor survival and higher potential of metastasis, recurrence and drug resistance in patients with osteosarcoma. After knocking-out of CD44 by the CRISPR-Cas9 system, not only the migration and invasion activities of osteosarcoma cells were significantly inhibited, but the drug sensitivity was also enhanced. CONCLUSION: CD44 silencing could inhibit the development of osteosarcoma migration, invasion, proliferation and ameliorate drug resistance to current treatment in osteosarcoma. This study applies new strategy to target CD44, which may improve the prognosis of osteosarcoma.
Authors: Qizhi Qin; Mario Gomez-Salazar; Robert J Tower; Leslie Chang; Carol D Morris; Edward F McCarthy; Kang Ting; Xinli Zhang; Aaron W James Journal: Cancer Res Date: 2022-08-03 Impact factor: 13.312
Authors: Elena Martin-Orozco; Ana Sanchez-Fernandez; Irene Ortiz-Parra; Maria Ayala-San Nicolas Journal: Front Immunol Date: 2019-12-20 Impact factor: 7.561