Journal
BIOMEDICAL MICRODEVICES
Volume 15, Issue 5, Pages 781-791Publisher
SPRINGER
DOI: 10.1007/s10544-013-9764-x
Keywords
Artificial renal chip; Cell engineering; Hemodialysis; Renal tubule function
Funding
- National Natural Science Foundation of China [21173090, 30970717]
- Special Fund for Strategic Emerging Industry Development of Shenzhen [JCYJ20120618100557119]
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We report the fabrication and function evaluation of multi-layer biochip dialyzer. Such device may potentially be applied to the wearable hemodialysis systems. By merging the advantages of microfluidic chip technology with cell engineering, both functions of glomerular filtration and renal tubule physiological activity are integrated in the same device. This device is designed into a laminated structure, in which the chip number of the superimposed layer can be arbitrarily tailored in accordance with the requirements of dialysis capacity. We propose that such structure can overcome the obstacles of large size and detached structure of the traditional hollow fiber dialyzer. To construct this multilayer biochips dialyzer, two types of dialyzer device with two-layered and six-layered chips are assembled, respectively. Cell adhesion and proliferation on three different dialysis membrane materials under static and dynamic conditions are investigated and compared. The filtration capability, reabsorption function and excrete ammonia function of the resulting multi-layer biochip dialyzer are evaluated. The results reveal that the constructed device can perform higher filtration efficiency and also play a role of renal tubule. This methodology may be useful in developing scaling down artificial kidneys that can act as wearable or even implantable hemodialysis systems.
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