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HOMMA-TAKEDA SHINO, TERADA YASUKO, ISO HIROYUKI, ISHIKAWA TAKAHIRO, OIKAWA MASAKAZU, KONISHI TERUAKI, IMASEKI HITOSHI, SHIMADA YOSHIYA. RUBIDIUM DISTRIBUTION IN KIDNEYS OF IMMATURE RATS. ACTA ACUST UNITED AC 2011. [DOI: 10.1142/s0129083509001722] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Synchrotron radiation X-ray fluorescence (SR-XRF) using high energy incident X-rays was combined with micro-PIXE to analyze the renal distribution of Rb and essential elements in immature rats. The Rb concentrations in the kidneys of newborn (1 week old) and young (3 weeks old) rats were 4.19 ± 0.71 and 4.13 ± 0.30 µg/g, respectively, similar to those of adult rats. Rubidium as well as Zn was detected more in the cortex than the medulla, while Fe was concentrated in the outermost areas of the medulla of newborn rats. The renal structures of young rats achieved adult zonation into the cortex, the outer medulla and the inner medulla. Rubidium was high in the outer stripe of the outer medulla. Further analysis at higher resolution revealed Rb in the proximal tubules in the innermost part of the cortex. These results indicated that Rb was distributed downstream of the proximal tubules. This profile was similar to that of potassium, an Rb congener.
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Affiliation(s)
- SHINO HOMMA-TAKEDA
- Experimental Radiobiology for Children's Health Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - YASUKO TERADA
- Japan Synchrotron Radiation Research Institute, Mikazuki, Hyogo 679-5198, Japan
| | - HIROYUKI ISO
- Department of Technical Support and Development, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - TAKAHIRO ISHIKAWA
- Department of Technical Support and Development, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - MASAKAZU OIKAWA
- Department of Technical Support and Development, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - TERUAKI KONISHI
- Department of Technical Support and Development, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - HITOSHI IMASEKI
- Department of Technical Support and Development, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - YOSHIYA SHIMADA
- Experimental Radiobiology for Children's Health Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
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