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yyc12596
гæ (ÖøÃûдÊÖ)
- Ó¦Öú: 10 (Ó×¶ùÔ°)
- ½ð±Ò: 10847.3
- É¢½ð: 2230
- ºì»¨: 34
- Ìû×Ó: 2270
- ÔÚÏß: 355.1Сʱ
- ³æºÅ: 2034994
- ×¢²á: 2012-09-28
- ÐÔ±ð: MM
- רҵ: °×Ѫ²¡
6Â¥2014-10-04 00:26:50
yyc12596
гæ (ÖøÃûдÊÖ)
- Ó¦Öú: 10 (Ó×¶ùÔ°)
- ½ð±Ò: 10847.3
- É¢½ð: 2230
- ºì»¨: 34
- Ìû×Ó: 2270
- ÔÚÏß: 355.1Сʱ
- ³æºÅ: 2034994
- ×¢²á: 2012-09-28
- ÐÔ±ð: MM
- רҵ: °×Ѫ²¡
|
ÎÄÏ×1£º Prostaglandin E2 Receptors, EP2 and EP4, Differentially Modulate TNF-¦Á and IL-6 Production Induced by Lipopolysaccharide in Mouse Peritoneal Neutrophils ¡î Hana Yamane, Yukihiko Sugimoto, Satoshi Tanaka, Atsushi Ichikawa1 BBRC,Volume 278, Issue 1, 11 November 2000, Pages 224¨C228 ¹ØÓÚСÊó¸¹Ç»ÖÐÐÔÁ£Ï¸°ûµÄ»ñµÃ·½·¨£º Preparation of peritoneal neutrophils. Mice were injected intraperitoneally with 2 ml of 5% casein in sterile saline and were killed by cervical dislocation 5¨C6 h after injection. The lavage fluids were collected in a syringe, and exudated peritoneal cells were precipitated by centrifugation. Neutrophils in peritoneal cells were purified by Percoll stepwise density gradient (1.090 and 1.070 g/ml) centrifugation (600g for 20 min at 4¡ãC). The purity of neutrophils was greater than 95% as determined by staining with May¨CGrunwald¨C Giemsa. Neutrophils were suspended in RPMI 1640 medium containing 10% heat-inactivated fetal bovine serum, 150 mM 2-mercaptoethanol and 100 mM sodium pyruvate. ¹ØÓÚÒò×Ӵ̼¤£º Measurement of cytokine production. Neutrophils (1 3 106 cells/ ml) were incubated with or without 100 ng/ml LPS for the indicated time at 37¡ãC in 5% CO2. After incubation, each culture was centrifuged at 300g for 5 min at 4¡ãC to remove the cells. The amounts of TNF-a and IL-6 in the supernatant were assayed using the respective ELISA kits according to the manufacturer¡¯s instructions. |
2Â¥2014-10-03 23:43:36
yyc12596
гæ (ÖøÃûдÊÖ)
- Ó¦Öú: 10 (Ó×¶ùÔ°)
- ½ð±Ò: 10847.3
- É¢½ð: 2230
- ºì»¨: 34
- Ìû×Ó: 2270
- ÔÚÏß: 355.1Сʱ
- ³æºÅ: 2034994
- ×¢²á: 2012-09-28
- ÐÔ±ð: MM
- רҵ: °×Ѫ²¡
|
½á¹û£º Effect of PGE2 on LPS-Stimulated TNF-a and IL-6 Production in Mouse Peritoneal Neutrophils LPS treatment (100 ng/ml) induced the production of TNF-a and IL-6 in mouse peritoneal neutrophils (Fig. 3). TNF-a production rapidly increased and then decreased to the basal level by 12 h. The maximum level was obtained at 2 h after LPS stimulation. However, IL-6 production increased gradually and reached a plateau level at 8 h after LPS stimulation. Simultaneous addition of PGE2 with LPS suppressed the TNF-a production and enhanced the IL-6 production significantly (Fig. 3). However, the PGE2 effects in the absence of LPS were relatively small. Dibutyryl cAMP (1 mM) suppressed the TNF-a production at 2 h and enhanced the IL-6 production at 4 hr after the LPS stimulation in peritoneal neutrophils (Table I). It was reported that endogenous PG synthesis was induced by LPS treatment through COX-2 induction in human neutrophils [16, 17]. However, in mouse peritoneal neutrophils pretreatment with indomethacin (1 mM), a nonselective COX inhibitor, induced no changes in the LPS-stimulated production of TNF-a and IL-6 (data not shown). ÕâÆªÎÄÕ±Ƚϼòµ¥¡£ÔÙËÑËÑÆäËûÎÄÏ׿´¡£ |
3Â¥2014-10-03 23:47:08
yyc12596
гæ (ÖøÃûдÊÖ)
- Ó¦Öú: 10 (Ó×¶ùÔ°)
- ½ð±Ò: 10847.3
- É¢½ð: 2230
- ºì»¨: 34
- Ìû×Ó: 2270
- ÔÚÏß: 355.1Сʱ
- ³æºÅ: 2034994
- ×¢²á: 2012-09-28
- ÐÔ±ð: MM
- רҵ: °×Ѫ²¡
|
ÎÄÏ×2£º Enhanced Th1 Activity and Development of Chronic Enterocolitis in Mice Devoid of Stat3 in Macrophages and Neutrophils Kiyoshi Takeda1, 4, 2, Björn E Clausen2, 3, 3, Tsuneyasu Kaisho1, 4, Tohru Tsujimura2, Nobuyuki Terada2, Irmgard Förster3, 2, 4, Shizuo Akira1, 4, 2, 1 ImmunityµÄһƪÎÄÕ¡£Õâ¼ÒÔÓÖ¾Ó°ÏìÒò×Ó¹ý20·ÖÁË£¬¼¸ºõÊÇBBRCµÄÊ®±¶¡£ Volume 10, Issue 1, 1 January 1999, Pages 39¨C49 »ñÈ¡ÖÐÐÔÁ£Ï¸°ûµÄ·½·¨£º For peritoneal neutrophils, cells were isolated from the peritoneal cavity after 4 hr of thioglycollate injection and cultured for 18 hr in the presence or absence of 10 ng/ml IL-10. Then, nonadherent cells were harvested and used for further experiments. These cells were >90% positive for Gr-1 as determined by flow cytometry. In the case of more strict experiments, the cells were further enriched by magnetic cell sorting (MACS, Miltenyi Biotec) using biotin-conjugated anti-Gr-1 antibody and streptavidin-microbeads. |
4Â¥2014-10-03 23:55:15













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