Cytotoxicity of hydroxyapatite nanoparticles is shape and cell dependent

被引:0
作者
Zhao, Xinxin [1 ]
Ng, SuXiu [1 ]
Heng, Boon Chin [1 ]
Guo, Jun [1 ]
Ma, LwinLwin [1 ]
Tan, Timothy Thatt Yang [2 ]
Ng, Kee Woei [1 ]
Loo, Say Chye Joachim [1 ]
机构
[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore
基金
英国医学研究理事会;
关键词
Hydroxyapatite; Nanomaterials; Nanotoxicity; Inflammatory cytokines; Particle-cell association; MONOCYTES IN-VITRO; DRUG-DELIVERY; CYTOKINES PRODUCTION; TOXICITY; PARTICLES; NANO; MECHANISM; RESPONSES; RELEASE; CARRIER;
D O I
暂无
中图分类号
R99 [毒物学(毒理学)];
学科分类号
100405 ;
摘要
Nanosized hydroxyapatite (nHA) has been proposed as drug delivery vehicles because of its biocompatibility. While the possible risks of nHA inducing inflammation have been highlighted, the specific influence of varying nHA particle morphology is still unclear. In order to establish this understanding, nHA of four different shapes-needle (nHA-ND), plate (nHA-PL), sphere (nHA-SP) and rod (nHA-RD)-were synthesized. The particle effects with the concentration of 10-300 mu g/mL on cytotoxicity, oxygen species generation, production of inflammatory cytokines (TNF-alpha and IL-6), particle-cell association and cellular uptake were evaluated on BEAS-2B and RAW264.7 cells. Results show that nHA-ND and nHA-PL induced the most significant cell death in BEAS-2B cultures compared to nHA-SP and nHA-RD. Necrosis-apoptosis assay by FITC Annexin V and propidium iodide (PI) staining revealed loss of the majority of BEAS-2B by necrosis. No significant cell death was recorded in RAW264.7 cultures exposed to any of the nHA groups. Correspondingly, no significant differences were observed in TNF-alpha level for RAW264.7 cells upon incubation with nHA of different shapes. In addition, nHA-RD exhibited a higher degree of particle-cell association and internalization in both BEAS-2B and RAW264.7 cells, compared to nHA-ND. The phenomena suggested that higher particle-cell association and increased cellular uptake of nHA need not result in increased cytotoxicity, indicating the importance of particle shape on cytotoxicity. Specifically, needle- and plate-shaped nHA induced the most significant cell-specific cytotoxicity and IL-6 expression but showed the least particle-cell association. Taken collectively, we demonstrated the shape-dependent effects of nHA on cytotoxicity, inflammatory cytokine expression and particle-cell association.
引用
收藏
页码:1037 / 1052
页数:16
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