皮奥格利塔可以预防急性和慢性心脏异位移植排斥
Hisanori Kosuge1, Go Haraguchi, Noritaka Koga
1Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
Circulation
|June 1, 2006
概括
皮奥格利塔显著改善了小鼠的心脏全移植存活率,通过减少炎症和新极端增生症. 这种PPAR-马激动剂在预防急性和慢性移植排斥方面表现有前途.
科学领域:
- 免疫学 免疫学 免疫学
- 移植生物学 移植生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 过氧体增殖器激活受体- (PPAR-) 对于炎症调节至关重要.
- 心脏移植是治疗末期心脏病的重要疗法,但异种移植的拒绝仍然是一个重大挑战.
- 在小鼠模型中研究皮奥格利塔对急性和慢性心脏异位移植排斥的影响是必不可少的.
研究的目的:
- 在小鼠心脏移植模型中评估皮奥格利塔在预防急性和慢性排斥的疗效.
- 确定皮奥格利塔影响全移植存活和排斥过程的机制.
- 评估皮奥格利塔在移植心脏中的平滑肌肉细胞增殖和炎症介质表达上的作用.
主要方法:
- 使用不匹配的捐赠者和接受者小鼠进行了异型的小鼠心脏移植.
- 小鼠在移植前一天开始接受标准或补充皮奥格利塔的 (3毫克/公斤/天).
- 评估了移植存活率,新极端增生,炎症标志物表达 (IFN-,MCP-1,IL-10),T细胞增殖 (混合淋巴细胞反应) 和光滑肌肉细胞增殖.
主要成果:
- 皮奥格利塔显著延长了急性排斥 (34.6天与8.4天相比,P<0.003) 的心脏全移植生存时间.
- 用皮奥格利塔治疗显著降低了慢性排斥中的新极度增生症 (25.1%对65.8%,P<0.001).
- 皮奥格利塔抑制了关键的炎症媒介 (IFN-,MCP-1,IL-10) 并抑制了T细胞和光滑肌肉细胞的增殖.
结论:
- 在小鼠心脏移植模型中,皮奥格利塔有效地延长了异种移植的存活时间,并减轻了新极端增生症.
- 药物的机制包括抑制平滑肌肉细胞的增殖和减少炎症反应.
- 皮奥格利塔代表了一种潜在的新疗法策略,用于预防急性和慢性异位移植排斥.
相关概念视频
Oral Hypoglycemic Agents: Biguanides and Glitazones
998
Biguanides, particularly metformin (Glucophage), are insulin sensitizers that enhance glucose uptake, thereby reducing insulin resistance. Unlike sulfonylureas, metformin doesn't prompt insulin secretion, which helps to curb hypoglycemia risk. Metformin is beneficial in treating conditions like polycystic ovary syndrome due to its insulin-resistance reduction capability. The drug's primary action involves curtailing hepatic gluconeogenesis, a significant contributor to high blood...
998
Oral Hypoglycemic Agents: Glinides
1.0K
Repaglinide (Prandin) and Nateglinide (Starlix), known as glinides, are oral insulin secretagogues that stimulate insulin release from pancreatic β cells by closing the ATP-sensitive potassium channels (KATP channel). Repaglinide controls insulin release from pancreatic β cells by managing potassium efflux. It shares two binding sites with sulfonylureas and also has a unique site, indicating overlapping mechanisms of action. With a rapid onset and a 4-7 hour duration, it effectively...
1.0K
Oral Hypoglycemic Agents: α-Glucosidase Inhibitors
958
α-glucosidase inhibitors, including acarbose (Precose), miglitol (Glyset), and voglibose (Voglib) (primarily available in Asia), are drugs that control blood sugar levels by delaying the digestion of starch and disaccharides. They achieve this by inhibiting α-glucosidase enzymes in the intestine, which slow the absorption of carbohydrates in the intestine, which in turn leads to a prolonged release of the glucoregulatory hormone GLP-1 from intestinal L-cells.
Acarbose and miglitol are...
Acarbose and miglitol are...
958
Glucagon-like Receptor Agonists
1.3K
Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by...
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by...
1.3K
Dipeptidyl Peptidase 4 Inhibitors
1.1K
Dipeptidyl peptidase 4 (DPP-4) is a serine protease widely distributed in the body. It's involved in the inactivation of GLP-1 and GIP hormones, which are crucial for insulin regulation. DPP-4 inhibitors, such as sitagliptin (Januvia), saxagliptin (Onglyza), linagliptin (Tradjenta), alogliptin (Nesina), and vildagliptin (Galvus), help increase the proportion of active GLP-1, enhancing insulin secretion. These inhibitors work by competitively binding to DPP-4. This binding causes a...
1.1K


