Compensatory Renal Growth in Uninephrectomized Immature Rats: Proliferative Activity and Epidermal Growth Factor

Access this Article

Search this Article

Author(s)

    • Okada Toshiya OKADA Toshiya
    • Department of Integrated Structural Biosciences, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
    • Omoto-Kitao Mika OMOTO-KITAO Mika
    • Department of Integrated Structural Biosciences, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
    • NAKAMURA Jun
    • Department of Environmental Sciences and Engineering, University of North Carolina
    • MINO Masaki
    • Department of Integrated Structural Biosciences, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
    • KONDO Tomohiro
    • Department of Integrated Structural Biosciences, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
    • TAKESHITA Ai
    • Department of Integrated Structural Biosciences, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
    • KUSAKABE Ken Takeshi
    • Department of Integrated Structural Biosciences, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
    • KATO Keiko
    • Department of Integrated Structural Biosciences, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University

Abstract

Compensatory response to uninephrectomy in immature animals is stronger compared with that in adult ones and the response is due mainly to renal cell proliferation. The present study explored to show the growth pattern of the remaining kidney immediately after uninephrectomy in immature rats with special reference to proliferating activity and epidermal growth factor (EGF). Immunolocalizations of proliferating cell nuclear antigen (PCNA) and EGF in immature rat kidney were examined during the first three days after uninephrectomy. Semi-quantitative analysis of the expression of preproEGF mRNA was performed. One day after the operation, the PCNA positive cell ratios in the glomeruli and the proximal tubules were significantly higher in unilaterally nephrectomized (UNx) rats than in sham-operated (Sham) rats. In UNx and Sham rats, the proximal and distal tubular cells showed positive reactions to EGF antibody. The positive reaction of proximal tubules to EGF antibody was weaker in UNx than in Sham rats 1 day after the operation, while the degree of reactivity was not different between UNx and Sham rats 3 days after the operation. The level of expression of preproEGF mRNA in the kidney was significantly lower in UNx than in Sham rats 1 day after the operation. These results indicate that unilateral nephrectomy in immature rats causes increased proliferative activity and decreased expression of EGF in the remaining kidney during the early period of compensatory renal growth.<br>

Journal

  • Journal of Veterinary Medical Science

    Journal of Veterinary Medical Science 72(8), 975-980, 2010

    JAPANESE SOCIETY OF VETERINARY SCIENCE

Codes

  • NII Article ID (NAID)
    130000264256
  • NII NACSIS-CAT ID (NCID)
    AA10796138
  • Text Lang
    ENG
  • ISSN
    0916-7250
  • NDL Article ID
    10813651
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-350
  • Data Source
    NDL  J-STAGE 
Page Top