相关实验视频
Updated: May 13, 2026

09:50
Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures
Published on: June 28, 2017
9.1K
对冷保护剂的高通量评估,以测量减少毒性的混合物效应
Nima Ahmadkhani1, Cameron Sugden1, James D Benson2
1School of Chemical, Biological and Environmental Engineering, Oregon State University, US.
Cryobiology
|September 17, 2025
概括
发现较少有毒的冷保护剂 (CPA) 是器官玻璃化的关键. 这项研究选了21种化合物,发现四种二元CPA混合物显著降低了毒性,增强了细胞活力以获得更好的冷保存.
科学领域:
- 生物技术是生物技术.
- 细胞生物学 细胞生物学
- 低温生物学 低温生物学
背景情况:
- 玻璃化可以冷保存器官,但需要高度的有毒冷保护剂 (CPA).
- 有限的CPA选项阻碍了开发更安全的玻璃化解决方案.
- 需要新的CPA来提高疗效和降低毒性.
研究的目的:
- 选21种化合物单独和二元组合中的毒性.
- 为了识别具有降低毒性的新型冷保护剂 (CPA) 混合物.
- 开发一种高通量方法来评估CPA的毒性.
主要方法:
- 在室温下对21种化合物进行高通量选.
- 使用牛肺动脉内皮细胞 (BPAEC) 进行毒性评估.
- 评估不同度和暴露时间的单个化合物和二元组合.
主要成果:
- 毒性随着CPA度和暴露时间的增加而增加.
- 四种二元CPA组合 (甲胺/甘油,DMSO/1,3-二醇,1,2-二醇/乙烯基醇,1,3-二醇/乙烯基醇) 显示毒性显著降低.
- 这些二元组合的6mol/kg混合物导致较高的细胞活力与单个CPA溶液相比.
结论:
- 与单个CPA相比,二元CPA混合物可以显著降低毒性.
- 一种高通量选方法有助于建立CPA毒性数据库.
- 这种方法支持开发用于玻璃化新型低毒性CPA混合物的预测模型.
相关概念视频
Prevention of Further Absorption of Poison
In cases of acute poisoning, the primary objective is to prevent further absorption of the toxic substance into the body. Immediate interventions using various decontamination techniques targeting the gastrointestinal (GI) tract can achieve this. Decontamination is crucial to prevent poison from entering the systemic circulation, which involves washing affected areas with water and mild soap and removing contaminated clothing. Once external decontamination is done, attention must be turned to...
Combined Effects of Drugs: Synergism
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
Enhanced Elimination of Poison
Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
Drug Concentrations: Measurements
Drug concentration is the quantity of a drug present in a biological sample. Measuring drug amounts in biological samples allows the clinician to understand how a drug is absorbed, distributed, metabolized, and excreted. Samples can be obtained through invasive or non-invasive methods. Invasive techniques involve surgical or parenteral interventions to gather blood, cerebrospinal fluid, or tissue biopsy. Conversely, non-invasive approaches provide samples like urine, feces, and saliva.
Plasma —...
Plasma —...
Toxicity Testing in Animals
Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...

