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  • Title: G-CSF production in human bladder cancer and its ability to promote autocrine growth: a review.
    Author: Tachibana M, Murai M.
    Journal: Cytokines Cell Mol Ther; 1998 Jun; 4(2):113-20. PubMed ID: 9681250.
    Abstract:
    A variety of non-hematopoietic malignant tumors have been demonstrated to secrete granulocyte colony-stimulating factor (G-CSF) in amounts large enough to cause a significant systemic hematopoietic effect. Meanwhile, bladder cancer cells have been shown to secrete a variety of biological factors with no direct relation to urothelial cell origin. G-CSF produced by non-hematopoietic malignant cells in particular has been reported to be capable of inducing a leukemoid reaction in the host through intense stimulation of leukocyte production. This is most frequently associated with aggressive tumor cell growth and a poor clinical outcome. On the other hand, receptors for G-CSF have also been found on the cell surfaces of several non-hematopoietic cell types. These observations lead naturally to the tempting speculation that simultaneous acquisition of the ligand promotion and its receptor expression by a malignant tumor may provide a strong autocrine growth advantage. However, the role of autocrine growth factors in malignancy is even less clear, although it is undoubtedly important. In this review, G-CSF and tumor cell growth, particularly of human transitional cell carcinomas of the bladder, are discussed, and autocrine growth of human solid tumors is also summarized.
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