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71.
The contribution of protease-activated receptor 1 to neuronal damage caused by transient focal cerebral ischemia 总被引:6,自引:0,他引:6
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Junge CE Sugawara T Mannaioni G Alagarsamy S Conn PJ Brat DJ Chan PH Traynelis SF 《Proceedings of the National Academy of Sciences of the United States of America》2003,100(22):13019-13024
The serine proteases tissue plasminogen activator, plasmin, and thrombin and their receptors have previously been suggested to contribute to neuronal damage in certain pathological situations. Here we demonstrate that mice lacking protease-activated receptor 1 (PAR1) have a 3.1-fold reduction in infarct volume after transient focal cerebral ischemia. Intracerebroventricular injection of PAR1 antagonist BMS-200261 reduced infarct volume 2.7-fold. There are no detectable differences between PAR1-/- and WT mice in cerebrovascular anatomy, capillary density, or capillary diameter, demonstrating that the neuroprotective phenotype is not likely related to congenital abnormalities in vascular development. We also show that the exogenously applied serine proteases thrombin, plasmin, and tissue plasminogen activator can activate PAR1 signaling in brain tissue. These data together suggest that if blood-derived serine proteases that enter brain tissue in ischemic situations can activate PAR1, this sequence of events may contribute to the harmful effects observed. Furthermore, PAR1 immunoreactivity is present in human brain, suggesting that inhibition of PAR1 may provide a novel potential therapeutic strategy for decreasing neuronal damage associated with ischemia and blood-brain barrier breakdown. 相似文献
72.
Imamura H Takayama T Sugawara Y Kokudo N Aoki T Kaneko J Matsuyama Y Sano K Maema A Makuuchi M 《Lancet》2002,360(9350):2049-2050
The safety of the donor is paramount in living donor liver transplantation. The most important risk to the donor during hepatectomy is bleeding, and the inflow occlusion technique (Pringle's manoeuvre) has been reported to decrease bleeding without inducing liver injury in liver surgery. However, most transplant centres are doing donor hepatectomies without this technique for fear that it would result in ischaemic injury to the graft. We have done 46 living donor hepatectomies with Pringle's manoeuvre without any negative outcome on the quality of the graft. Surgeons should not hesitate to apply this technique in living donor hepatectomy. 相似文献
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Masatsugu Ohara Goki Suda Megumi Kimura Osamu Maehara Tomoe Shimazaki Taku Shigesawa Kazuharu Suzuki Akihisa Nakamura Naoki Kawagishi Masato Nakai Takuya Sho Mitsuteru Natsuizaka Kenichi Morikawa Koji Ogawa Tomoe Kobayashi Minoru Uebayashi Ryo Takagi Isao Yokota Tsuyoshi Shimamura Naoya Sakamoto 《Hepatology research》2020,50(6):715-725
77.
Go Kuwata Terumi Kamisawa Koichi Koizumi Taku Tabata Seiichi Hara Sawako Kuruma Takashi Fujiwara Kazuro Chiba Hideto Egashira Junko Fujiwara Takeo Arakawa Kumiko Momma Shinichiro Horiguchi 《Gut and liver》2014,8(1):29-34
Background/Aims
Ulcerative colitis (UC) is sometimes associated with autoimmune pancreatitis (AIP). Infiltration of immunoglobulin G4 (IgG4)-positive plasma cells is sometimes detected in the colonic mucosa of AIP or UC patients. This study aimed to clarify the relation between UC and IgG4.Methods
Associations with UC were reviewed in 85 AIP patients. IgG4 immunostaining was performed on biopsy specimens from the colonic mucosa of 14 AIP and 32 UC patients.Results
UC was confirmed in two cases (type 1 AIP, n=1; suspected type 2 AIP, n=1). Abundant infiltration of IgG4-positive plasma cells in the colonic mucosa was detected in the case of suspected type 2 AIP with UC and two cases of type 1 AIP without colitis. Abundant infiltration of IgG4-positive plasma cells was detected in 10 UC cases (IgG4-present, 31%). Although 72% of IgG4-absent UC patients showed mild disease activity, 70% of IgG4-present patients showed moderate to severe disease activity (p<0.05).Conclusions
UC is sometimes associated with AIP, but it seems that UC is not a manifestation of IgG4-related disease. Infiltration of IgG4-positive plasma cells is sometimes detectable in the colonic mucosa of UC patients and is associated with disease activity. 相似文献78.
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