|Cell responses to two kinds of nanohydroxyapatite with different sizes and crystallinities|
|Liu, Xiaochen2; Zhao, Minzhi2; Lu, Jingxiong3; Ma, Jian4; Wei, Jie1,3; Wei, Shicheng1,2|
|关键词||Nanohydroxyapatite Osteoblast-like Cells Cell Viability Cell Differentiation|
|刊名||INTERNATIONAL JOURNAL OF NANOMEDICINE|
|WOS标题词||Science & Technology|
|类目[WOS]||Nanoscience & Nanotechnology ; Pharmacology & Pharmacy|
|研究领域[WOS]||Science & Technology - Other Topics ; Pharmacology & Pharmacy|
|关键词[WOS]||IN-VITRO ; HYDROTHERMAL METHOD ; OSTEOBLAST PHENOTYPE ; HYDROXYAPATITE ; APOPTOSIS ; PROLIFERATION ; BIOCERAMICS ; TEMPERATURE ; DISSOLUTION ; COATINGS|
Introduction: Hydroxyapatite (HA) is the principal inorganic constituent of human bone. Due to its good biocompatibility and osteoconductivity, all kinds of HA particles were prepared by different methods. Numerous reports demonstrated that the properties of HA affected its biological effects.
Methods: Two kinds of nanohydroxyapatite with different sizes and crystallinities were obtained via a hydrothermal treatment method under different temperatures. It was found that at a temperature of 140 C, a rod-like crystal (n-HA1) with a diameter of 23 +/- 5 nm, a length of 47 +/- 14 nm, and crystallinity of 85% +/- 5% was produced, while at a temperature of 80 degrees C, a -rod-like crystal (n-HA2) with a diameter of 16 +/- 3 nm, a length of 40 +/- 10 nm, and -crystallinity of 65% +/- 3% was produced. The influence of nanohydroxyapatite size and crystallinity on osteoblast viability was studied by MTT, scanning electron microscopy, and flow cytometry.
Results: n-HA1 gave a better biological response than n-HA2 in promoting cell growth and inhibiting cell apoptosis, and also exhibited much more active cell morphology. Alkaline phosphatase activity for both n-HA2 and n-HA1 was obviously higher than for the control, and no significant difference was found between n-HA1 and n-HA2. The same trend was observed on Western blotting for expression of type I collagen and osteopontin. In addition, it was found by transmission electron microscopy that large quantities of n-HA2 entered into the cell and damaged the cellular morphology. Release of tumor necrosis factor alpha from n-HA2 was markedly higher than from n-HA1, indicating that n-HA2 might trigger a severe inflammatory response.
Conclusion: This work indicates that not all nanohydroxyapatite should be considered a good biomaterial in future clinical applications.
|项目编号||2007CB936103 ; 985 ; 30970720 ; 09411954900|
|资助机构||State Key Development Program for Basic Research of China ; Fundamental Research Funds for the Central Universities ; Peking University ; National Natural Science Foundation of China ; Key Medical Program of Science and Technology Development of Shanghai|
|作者单位||1.Tongji Univ, Hosp Stomatol, Shanghai 200092, Peoples R China|
2.Peking Univ, Sch Stomatol, Dept Oral & Maxillofacial Surg, Beijing 100081, Peoples R China
3.Peking Univ, Ctr Biomed Mat & Tissue Engn, Acad Adv Interdisciplinary Studies, Beijing 100081, Peoples R China
4.E China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China
|Liu, Xiaochen,Zhao, Minzhi,Lu, Jingxiong,et al. Cell responses to two kinds of nanohydroxyapatite with different sizes and crystallinities[J]. INTERNATIONAL JOURNAL OF NANOMEDICINE,2012,7:1239-1250.|
|APA||Liu, Xiaochen,Zhao, Minzhi,Lu, Jingxiong,Ma, Jian,Wei, Jie,&Wei, Shicheng.(2012).Cell responses to two kinds of nanohydroxyapatite with different sizes and crystallinities.INTERNATIONAL JOURNAL OF NANOMEDICINE,7,1239-1250.|
|MLA||Liu, Xiaochen,et al."Cell responses to two kinds of nanohydroxyapatite with different sizes and crystallinities".INTERNATIONAL JOURNAL OF NANOMEDICINE 7(2012):1239-1250.|