量化药物-环极素复合的痛苦掩盖效应:NMR-ROESY混合时间方法
Tomohiko Ueda1, Mei S Yamaguchi1, Leela Christian-Tabak1
1Sumitomo Pharma Co., Ltd., 3-1-98 Kasugade-naka, Konohana-ku, Osaka, 554-0022, Japan.
Carbohydrate research
|March 5, 2024
概括
药物 - 环极 (CD) 复合物有效地掩盖了苦味,改善了患者的服从性. NMR-ROESY分析与人类感官测试的相关性很好,证实了这些配方的苦味掩饰.
科学领域:
- 制药科学 制药科学
- 药物运输 药物运输 药物运输
- 物理化学 物理化学
背景情况:
- 患者的服从往往受到不愉快的药物味道,特别是苦味的阻碍.
- 药物-环德 (CD) 纳入复合体是提高药物溶解度和减轻苦味的常见策略.
研究的目的:
- 为了评估环极素 (CDs) 对各种药物的痛苦掩盖效果.
- 为了将药物-CD纳入复合体形成的强度与味道掩饰相关联.
- 评估NMR-ROESY,人体感官测试和电子舌头测量在评估苦味掩饰方面的实用性.
主要方法:
- 核磁共振 (NMR) 旋转框架Overhauser效应光谱 (ROESY) 用于调查药物-CD纳入复合物的形成.
- 进行了人类感官测试,以确定非苦味的药物CD配方.
- 进行电子舌头 (e-tongue) 测量以评估味觉检测.
主要成果:
- NMR-ROESY结果与人类感官测试结果有很强的相关性,其中较短的磁化传输时间表明有效的苦味掩饰.
- 人类参与者确定了特定的药物-CD纳入综合体,以掩盖苦.
- 电子舌头无法检测任何测试的药物CD含有复合物的味道.
- NMR-ROESY成功地确定了在多种药物系统中形成的特定药物-CD纳入复合体.
结论:
- 环极素 (CDs) 有效地掩盖了各种药物的苦味.
- NMR-ROESY是一种有价值的工具,用于预测和确认药物-CD纳入复合物的苦味掩饰.
- 结合NMR-ROESY和感官测试的多方法方法提供了对苦味掩饰的全面评估.
- 这些发现对制药配方有重大影响,提高了患者对药物的遵守和满意度.
更多相关视频
相关概念视频
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
839
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
839
¹H NMR: Complex Splitting
1.3K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
1.3K
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR
1.1K
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.
1.1K
¹H NMR: Interpreting Distorted and Overlapping Signals
1.0K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.0K
¹³C NMR: ¹H–¹³C Decoupling
1.1K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.1K
¹H NMR Signal Integration: Overview
1.5K
The intensity of a signal, which can be represented by the area under the peak, depends on the number of protons contributing to that signal. The area under each peak is shown as a vertical line called an integral, with the integral value listed under it, as seen in the proton NMR spectrum of benzyl acetate. Each integral value is divided by the smallest integral value to obtain the ratio of the number of protons producing each signal. The ratio reveals the relative number of protons and not...
1.5K


