ABSTRACT
Objective To observe the adhesion and growth of LLC-PK1 cells and ECV304 cells on titania nanotube arrays, and provide evidence for construction of miniaturation bioartificial kidney. Methods Four different diameters nanotube materials were prepared by anodic oxidation, each material was processed by unannealed and with UV irradiation, annealed and without UV irradiation, annealed and with UV irradiation, respectively, which had 12 groups totally,then two kinds of cells were separately grown on the 12 materials. The adhesion and growth of the two kinds of cells were studied under a fluorescence microscope. MTT assay was used to test the activity of two kinds of cells on different diameters and the proliferation of two kinds of cells on 70 nm diameters. Results The adhesion and proliferation of two kinds of cells on TiO2 nanotube arrays were basically consistent, both on anatase TiO2 nanotubes with 70 nm diameter but without UV irradiation showed the optimal adhesion and activity. The activities of LLC-PK1 cells and ECV304 cells were both increased with time extended, while the absorbance of ECV304 cells was higher on pure Ti film than on titania nanotube. Conclusion TiO2 nanotube is beneficial to LLC-PK1 cells, but is unfavorable for ECV304 cells when they grow alone.
ABSTRACT
Objective To investigate the clinical efficacy and safety of hybrid artificial kidney in the treatment of patients with uremia.Methods 30 maintenance hemodialysis patients who were altered to be treated by hybrid artificial kidney(treatment group)were compared with 29 patients who were treated by hemodialysis only(control group).The amelioration of clinical symptom,remove of urea nitrogen(BUN),creatinine(Cr).Middle Molecular Substance(MMS)and variation of blood regular test were observed.Results BUN,Cr,haemoglobin level,leucocyte count and blood platelets count improved between after and before treatment(P ＜0.05),but there was no significant difference between the two groups(P ＞ 0.05).Clearance rate ofMMS(25.6%)and improvement of clinical symptoms in treatment group were better than those of control group(5.9%)and difference was statistically significant(P ＜0.05,P＜0.01).There was no serious adverse events in two groups.Conclusion Hybrid artificial kidney could remove molecular substances better and markedly improv clinical symptoms.It can make up for the shortcomings of conventional hemodialysis.