Digoxin transport by renal proximal tubule cells is enhanced by adhesive synthetic RGD peptide

Hiroyuki Ijima, S. Kuroda, T. Ono, K. Kawakami

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Introduction: The dialyzer apparatus has been widely used as an artificial kidney in medical treatment. However, side effects such as amyloidosis have occurred during long-term treatment. Therefore, we focused on developing a hybrid artificial kidney with a filtration and reabsorption apparatus, but it was found that cells spread extensively and it is difficult to maintain a uniform monolayer with a regular cell shape on a collagen-coated substrate. The purpose of this study was to improve cell adhesion, uniform stable monolayer formation and active transport function by immobilization of arginine-glycine-aspartic acid (RGD) on the culture substratum. Materials and Methods: Polycarbonate semipermeable membranes were coated with collagen, fibronectin, laminin and synthetic polypeptide, including RGD (Pronectin F). Cell adhesion and digoxin transport were estimated using a renal proximal tubule cell line that overexpressed the P-glycoprotein gene. Results and Discussion: Under initial and confluent conditions, immobilized cell density in Pronectin F-coated wells was higher than that under other conditions. Transepithelial electrical resistance and digoxin transport activity on Pronectin F-coated membranes were the highest of all conditions. This might have been caused by uniform cell morphology and high cell density.

Original languageEnglish
Pages (from-to)25-33
Number of pages9
JournalInternational Journal of Artificial Organs
Issue number1
Publication statusPublished - Jan 2007

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Bioengineering
  • Biomaterials
  • Biomedical Engineering


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