A device for adsorbing unbound, unconjugated bilirubin and its effects in vitro and in a hyperbilirubinemic newborn piglet

Keishi Miwa, Kazuhiro Misumi, Kaoru Shimada, Noriaki Miyoshi, Takehiro Inoue, Yoshihiro Kawabe, Kazuhiro Moriyama, Satoshi Ibara, Tsuyomu Ikenoue, Hiroshi Sakamoto

Research output: Contribution to journalArticlepeer-review

Abstract

Aims: A novel blood purification material that we previously reported as a superantigen- and cytokine-adsorbing device (SCAD) was evaluated for its ability to adsorb unbound, unconjugated bilirubin (UUBil) in vitro and in vivo. Methods: In albumin-containing buffer, UUBil was dissolved and circulated through the SCAD column. Also, bilirubin was infused into low-body weight newborn piglets and hemoperfused for 3 h over SCAD columns. Results: In albumin-containing buffer, concentration of bilirubin decreased from 34 to 0.6 mg/dL within 5 h and the SCAD fiber turned brown, indicating that bilirubin was adsorbed onto the surface of the adsorbent and was not degraded during the circulation. Using the hyperbilirubinemia swine, clearances of total bilirubin (TBil), direct bilirubin (DBil), and indirect bilirubin (IdBil) were significantly higher (P<0.01) in the SCAD group compared with the control group. The clearances of TBil, DBil, and IdBil at 3 h after the initiation of the bilirubin infusion were 0.47, 0.53, and 0.45 mL/min, respectively, at a blood flow rate of 2.5 mL/min, and this result indicates that almost 20% of bilirubins were adsorbed to the SCAD column in a single passage. Conclusion: These results provide initial evidence that SCAD treatment is effective in the removal of UUBil and can be performed safely in newborn animals.

Original languageEnglish
Pages (from-to)232-235
Number of pages4
JournalJournal of Perinatal Medicine
Volume35
Issue number3
DOIs
Publication statusPublished - 01-06-2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynaecology

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