超homocysteinemia对血或组织腺水平和功能的影响
Ya-Fei Chen1, Pin-Lan Li, Ai-Ping Zou
1Departments of Physiology and Pharmacology Toxicology, Medical College of Wisconsin, Milwaukee, Wis 53226, USA.
高水平的homocysteine (hHcys) 降低了腺素 (Ado) 度,这可能解释了它的心血管风险. 这项研究揭示了hHcys如何影响Ado水平和功能.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 心血管科学 心血管科学
- 生物化学 生物化学
背景情况:
- 过高血糖血症 (hHcys) 是已知的心血管疾病风险因素.
- 之前的研究表明,hHcys会独立于高血压引起球功能障碍.
- 在hHcys的有害作用背后的确切机制仍然不清楚.
研究的目的:
- 通过降低血或组织腺素 (Ado) 度来研究hHcys会引起病原性影响的假设.
- 阐明将hHcys与功能障碍联系在一起的机制.
主要方法:
- 在Sprague-Dawley大鼠中,通过L-homocysteine输液诱导了急性高homocysteinemia.
- 测量了血和脏透析剂中的腺水平.
- 分析了酶动力学,以确定对SAH酶和5'-核酶的影响.
- 评估了功能参数 (血流,GFR,分泌) 并评估了Ado受体对抗剂的作用.
主要成果:
- 静脉注射L-homocysteine输液显著增加了血的homocysteine水平,同时降低了血和脏的腺水平.
- 慢性hHcys也导致血腺的显著降低.
- 动力学分析表明SAH酶抑制,而不是5'-核酶,是导致腺素减少的原因.
- 胰岛素输注损害了脏血液流动,GFR和分泌功能,这些影响被腺素受体对抗剂逆转.
结论:
- 超homocysteinemia导致血和组织腺氨酸度降低,主要是通过SAH酸酶抑制.
- 降低腺是导致功能障碍的关键机制,这种功能障碍在高血糖质血症中被观察到.
- 向腺路径可能为管理hHcys相关心血管并发症提供治疗策略.
更多相关视频
11:29HPLC-based Assay to Monitor Extracellular Nucleotide/Nucleoside Metabolism in Human Chronic Lymphocytic Leukemia Cells
Published on: July 20, 2016
04:17Author Spotlight: Advancing Cellular and Protein Engineering to Control Biological Functions and Develop Novel Therapies
Published on: September 27, 2024
相关概念视频
Factors Affecting Renal Clearance: Renal Impairment
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow
Effect of Hepatic Disease on Pharmacokinetics: Active Drug, Metabolite and Fraction of Metabolized Drug
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test
Drug Toxicity: Risk factors
Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
