The uptake mechanism of indocyanine green byrat isolated hepatocytes

Osamu Kamma, Kuniaki Saito, Yoichi Nagamura, Naomichi Ogitsu, Itaru Teshima, Isao Ishiguro, Madoka Ito

Research output: Contribution to journalArticle

Abstract

The uptake mechanisms of indocyanine green (ICG) were studied with rat native hepatocytes and denatured ones which were treated at 56°C for 10 minutes. The addition of several receptor blockers except aggregated IgG to the reaction system was not able to impair the uptake. Although metabolic inhibitors had no affect on the uptake, it was drastically reduced at low temperature. The denatured hepatocytes also eliminated ICG from reaction system rapidly rather than the native cells and it was inhibited at low temperature. The kinetic analysis of the ICG uptake by double reciprocal plots of Lineweaver-Burk showed the 4.76 nmol/min/106 cells of Vmax value and 0.15 mM of Km value for native hepatocytes but the line of denatured cells crossed at the origin, i. e., no Vmax and Km value was given as thesimple chemical binding of ICG. Subcellular fractionation of both the native and denatured hepatocytes after incubation with ICG indicated that ICG was distributed from membrane to lysosomal fraction in native cells but the most ICG was found in the membrane fraction in the case of denatured cells. Thus the uptake by denatured hepatocytes was not true one but the binding of ICG to the cell.

Original languageEnglish
Pages (from-to)41-47
Number of pages7
JournalJapanese Journal of Clinical Chemistry
Volume14
Issue number1
DOIs
Publication statusPublished - 01-01-1985
Externally publishedYes

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Indocyanine Green
Hepatocytes
Membranes
Temperature
Fractionation
Rats
Immunoglobulin G
Kinetics

All Science Journal Classification (ASJC) codes

  • Clinical Biochemistry

Cite this

Kamma, Osamu ; Saito, Kuniaki ; Nagamura, Yoichi ; Ogitsu, Naomichi ; Teshima, Itaru ; Ishiguro, Isao ; Ito, Madoka. / The uptake mechanism of indocyanine green byrat isolated hepatocytes. In: Japanese Journal of Clinical Chemistry. 1985 ; Vol. 14, No. 1. pp. 41-47.
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Kamma, O, Saito, K, Nagamura, Y, Ogitsu, N, Teshima, I, Ishiguro, I & Ito, M 1985, 'The uptake mechanism of indocyanine green byrat isolated hepatocytes', Japanese Journal of Clinical Chemistry, vol. 14, no. 1, pp. 41-47. https://doi.org/10.14921/jscc1971b.14.1_41

The uptake mechanism of indocyanine green byrat isolated hepatocytes. / Kamma, Osamu; Saito, Kuniaki; Nagamura, Yoichi; Ogitsu, Naomichi; Teshima, Itaru; Ishiguro, Isao; Ito, Madoka.

In: Japanese Journal of Clinical Chemistry, Vol. 14, No. 1, 01.01.1985, p. 41-47.

Research output: Contribution to journalArticle

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AU - Nagamura, Yoichi

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AU - Ishiguro, Isao

AU - Ito, Madoka

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