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81.
Nakagawa H Hirata Y Takeda K Hayakawa Y Sato T Kinoshita H Sakamoto K Nakata W Hikiba Y Omata M Yoshida H Koike K Ichijo H Maeda S 《Hepatology (Baltimore, Md.)》2011,54(1):185-195
The stress-activated mitogen-activated protein kinases (MAPKs), c-Jun NH2-terminal kinase (JNK), and p38 have been implicated in hepatocarcinogenesis. Although the many interrelated functions of JNK and p38 are precisely regulated by upstream signaling molecules, little is known about upstream regulators. We investigated the role of apoptosis signal-regulating kinase 1 (ASK1), a major player in the regulation of JNK and p38 activities, in hepatocarcinogenesis using a mouse hepatocellular carcinoma (HCC) model. ASK1-deficient (ASK1(-/-) ) and wildtype (WT) mice were treated with diethylnitrosamine on postnatal day 14. Strikingly, after 7 months, approximately three times as many tumors developed in ASK1(-/-) mice as in WT mice. Although JNK and p38 activation were attenuated in ASK1(-/-) HCCs relative to WT HCCs, cell proliferation was comparable in HCCs from both types of mice. On the other hand, both cancer cell apoptosis and hyperphosphorylation of BimEL, a proapoptotic Bcl-2 family member, were suppressed in the ASK1(-/-) HCCs. ASK1(-/-) mice showed remarkable resistance to Fas-induced hepatocyte apoptosis in vivo, probably because of attenuated JNK-mediated BimEL phosphorylation and mitochondrial apoptotic pathway activation. The reintroduction of ASK1 to ASK1(-/-) mouse liver using an adenoviral vector restored Fas-induced hepatocyte death and phosphorylation of JNK and BimEL. Similar findings were obtained in tumor necrosis factor alpha-induced hepatocyte apoptosis. Furthermore, ASK1 was involved in DNA damage-induced p21 up-regulation through a p38 pathway. CONCLUSION: ASK1 is involved in death receptor-mediated apoptosis and DNA-damage response by way of stress-activated MAPK in the liver, and thus acts as a tumor suppressor in hepatocarcinogenesis. This study provides new insight into the regulation of stress- activated MAPK signaling in hepatocarcinogenesis. 相似文献
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Simple modification of arm position improves B1+ and signal homogeneity in the thoracolumbar spine at 3T
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![点击此处可从《Journal of magnetic resonance imaging : JMRI》网站下载免费的PDF全文](/ch/ext_images/free.gif)
85.
Indirect MRI of 17o‐labeled water using steady‐state sequences: Signal simulation and preclinical experiment
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86.
Improvement of the repeatability of parallel transmission at 7T using interleaved acquisition in the calibration scan
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Prolonged neutropenia due to antihuman neutrophil antigen 2 (CD177) antibody after bone marrow transplantation
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Taizo Wada Satoshi Miyamoto Hiroyuki Okamoto Yusuke Matsuda Tomoko Toma Kohsuke Imai Masatoshi Takagi Tomohiro Morio Akihiro Yachie 《Pediatric blood & cancer》2017,64(7)
We describe a patient who presented with prolonged neutropenia due to anti‐human neutrophil antigen (HNA)‐2 (CD177) antibody after allogeneic bone marrow transplantation. A granulocyte immunofluorescence test showed bimodal expression of antineutrophil antibody that resulted from specific binding of anti‐HNA‐2 to CD177+ neutrophils from healthy donors. The patient did not respond to granulocyte colony stimulating factor, which is able to upregulate CD177 expression on neutrophils. The low percentage of CD177+ cells in the few remaining neutrophils supports the possibility of elimination of CD177‐upregulated neutrophils. These findings might explain an inferior response to neutrophil growth factors in neutropenia secondary to anti‐HNA‐2 antibody. 相似文献
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Kohsuke Uchida Toshiro Oda Hideki Adachi Junichi Wakabayashi Shinichi Hisasue and Yoshio Takagi 《International journal of urology》1999,6(12):630-632
We present a case of malignant fibrous histiocytoma of the spermatic cord. An 86-year-old man was admitted to the hospital with a right painless scrotal mass. Under the diagnosis of a testicular tumor, right radical orchiectomy was performed. Grossly, the tumor firmly adhered to the spermatic cord. The right testis and epididymis were normal. The histologic diagnosis was malignant fibrous histiocytoma. There was local recurrence 2 months after surgery. The recurrent tumor was resected with the surrounding soft tissue, but the patient died 5 months after the initial operation. 相似文献