Sadatoshi Sakuma

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Midkine (MK), a heparin-binding growth factor, binds strongly to oversulfated structures in chondroitin sulfates (CSs) and heparan sulfate. To elucidate the carbohydrate structure actually involved in the strong binding, dissected brains from 13-day mouse embryos were incubated with [14C]-glucosamine. The labeled glycosaminoglycans were fractionated by(More)
Midkine (MK), a heparin-binding growth factor, suppresses apoptosis of embryonic neurons in culture, induced by serum deprivation. Receptor-type protein tyrosine phosphatase zeta (PTP zeta) is a chondroitin sulfate proteoglycan with a transmembrane domain and intracellular tyrosine phosphatase domains. The activity of MK was abolished by digestion with(More)
BACKGROUND Midkine (MK) is a heparin-binding growth factor involved in diverse biological phenomena, eg, neural survival, carcinogenesis, and tissue repair. MK could have a protective action against ischemia/reperfusion (I/R) injury in the heart, because MK was shown to have cytoprotective activity in cultured neurons and tumor cells. We investigated this(More)
PURPOSE Neurofibromatosis type 1 (NF1) is characterized by systemic development of neurofibromas. Early clinical diagnosis can be ambiguous, and genetic diagnosis can be prohibitively difficult. Dysregulation of a number of growth factors has been suggested to be a mechanism of pathogenesis. This study was performed to assess the contribution of circulating(More)
Cardiac remodeling is thought to be the major cause of chronic heart dysfunction after myocardial infarction (MI). However, molecules involved in this process have not been thoroughly elucidated. In this study we investigated the long-term effects of the growth factor midkine (MK) in cardiac remodeling after MI. MI was produced by ligation of the left(More)
BACKGROUND Midkine is a heparin-binding growth factor preferentially expressed in tumor cells. The present study was performed to utilize anti-midkine antibody for tumor therapy. METHODS A monoclonal antibody to midkine was raised by immunizing mice deficient in the midkine gene. The binding site of the antibody was studied by using N-terminal half and(More)
BACKGROUND Midkine is a heparin-binding cytokine and is involved in etiology of various diseases. Thus, midkine inhibitors are expected to be helpful in treatment of many diseases. METHODS We developed a simple assay for midkine activity based on midkine-dependent migration of osteblastic cells. Midkine inhibitors were searched as materials that inhibit(More)
BACKGROUND The present study was conducted to assess whether midkine (MK), a multifunctional molecule known to stimulate tumor growth, may be involved in the development of endometriosis. METHODS The mitogenic activity of MK on cultured endometriotic stromal cells was examined by measuring 5-bromo-2'-deoxyuridine (BrdU) incorporation. Concentrations of MK(More)
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