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  • Title: Type-I interferon receptor expression: its circadian rhythm and downregulation after interferon-alpha administration in peripheral blood cells from renal cancer patients.
    Author: Shiba M, Nonomura N, Nakai Y, Nakayama M, Takayama H, Inoue H, Tsujimura A, Nishimura K, Okuyama A.
    Journal: Int J Urol; 2009 Apr; 16(4):356-9. PubMed ID: 19302507.
    Abstract:
    OBJECTIVES: To investigate the regulation of interferon-alpha (IFN-alpha) receptor expression in metastatic renal cell carcinoma (RCC) after IFN-alpha administration. METHODS: Blood sampling was carried out in eight patients with metastatic RCC and six healthy volunteers. Flow-cytometric analysis using a monoclonal antibody against the active subunit of the type-I IFN-alpha receptor (IFNAR2) was carried out to examine the circadian rhythm of IFNAR2 expression in peripheral blood mononuclear cells (PBMC) as well as its downregulation after IFN-alpha administration. RESULTS: According to its circadian rhythm IFNAR2 in PBMC had a peak expression at night. Once IFN-alpha is administered, IFNAR2 levels in PBMC showed downregulation within 48 h and recovered within another 48 h. CONCLUSIONS: Our findings might support the establishment of an optimal schedule for IFN-alpha administration.
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