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  • Title: Cyclic urinary leukopoietic activity in gray collie dogs.
    Author: Dale DC, Brown CH, Carbone P, Wolff SM.
    Journal: Science; 1971 Jul 09; 173(3992):152-3. PubMed ID: 5581910.
    Abstract:
    The urinary activities for bone marrow colony formation were measured on consecutive 24-hour urine samples from two gray collie dogs with cyclic neutropenia and from two normal collies. The activity varied cyclically in the gray collies with a peak activity developing during the neutropenic phase, which antecedes the return of blood neutrophils. The activity fell to undetectable levels after the blood neutrophil counts returned to the normal range. The urine of normal dogs showed no activity. Since the dogs with cyclic neutropenia have been shown to have periodic hematopoiesis, these data suggest a regulatory hormonal role for the substance measured by this assay.
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