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Micro-MRI methods to detect renal cysts in mice

  1. Author:
    Kobayashi, H.
    Kawamoto, S.
    Brechbiel, M. W.
    Jo, S. K.
    Hu, X. Z.
    Yang, T. X.
    Diwan, B. A.
    Waldmann, T. A.
    Schnermann, J.
    Choyke, P. L.
    Star, R. A.

  2. Author Address

    Kobayashi, H, NCI, Metab Branch, Ctr Canc Res, NIH, Bldg 10,Room 4N109,10 Ctr Dr, Bethesda, MD 20892 USA NCI, Metab Branch, Ctr Canc Res, NIH, Bethesda, MD 20892 USA. Johns Hopkins Univ, Sch Med, Dept Radiol, Baltimore, MD 21205 USA. NCI, Radioimmune & Inorgan Chem Sect, Radiat Oncol Branch, NIH, Bethesda, MD 20892 USA. NIDDK, Renal Diagnost & Therapeut Unit, NIH, Bethesda, MD USA. NIDDK, Lab Renal Funct & Dev, NIH, Bethesda, MD USA. NIH, Dept Diagnost Radiol, Ctr Clin, Bethesda, MD 20892 USA. NCI, Basic Res Program, SAIC Frederick, NIH, Frederick, MD 21701 USA.
    1. Year: 2004
  2. Journal: Kidney International
    1. 65
    2. 4
    3. Pages: 1511-1516
  4. Type of Article: Article
  1. Abstract:

    Background. Mouse models of disease, especially using transgenic and knockout technologies, are powerful tools to analyze the molecular basis of disease. We recently reported that a new dynamic micro-MRI method with dendrimer-based contrast agents can visualize renal structure and function in normal living mice and mice with acute renal failure. While MRI contrast enhancement is useful for detecting functional impairment of the kidneys, this technology has limitations in assessing morphologic changes, particularly cystic disease, because contrast-enhanced micro-MRI depicts cysts as low-intensity areas that cannot be distinguished from fibrotic foci.Methods. In the current study, we evaluated if micro-MRI employing a new three-dimensional MR hydrography signal sequence [three-dimensional fast imaging employing steady-state acquisition (3D-FIESTA)] can visualize chronic cystic changes without any contrast agents.Results. We were able to positively depict multiple renal cortical cysts of similar to0.2 mm diameter in a mouse model of sickle cell disease and observe serial changes of renal cysts ( 0.2 mm diameter) in cyclooxygenase-2 (COX-2) knockout mice during a 2 1/2-month period. Some cysts decreased in size over time.Conclusions. Micro-MRI with 3D-FIESTA can depict cyst formation in the diseased kidneys of living mice without injection of contrast agents

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