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Identification and Quantification by NMR Spectroscopy of the 22R and 22S Epimers in Budesonide Pharmaceutical Forms. Molecules 2022; 27:molecules27072262. [PMID: 35408662 PMCID: PMC9000859 DOI: 10.3390/molecules27072262] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/24/2022] [Accepted: 03/29/2022] [Indexed: 02/01/2023] Open
Abstract
The authors developed four variants of the qNMR technique (1H or 13C nucleus, DMSO-d6 or CDCl3 solvent) for identification and quantification by NMR of 22R and 22S epimers in budesonide active pharmaceutical ingredient and budesonide drugs (sprays, capsules, tablets). The choice of the qNMR technique version depends on the drug excipients. The correlation of 1H and 13C spectra signals to molecules of different budesonide epimers was carried out on the basis of a comprehensive analysis of experimental spectral NMR data (1H-1H gCOSY, 1H-13C gHSQC, 1H-13C gHMBC, 1H-1H ROESY). This technique makes it possible to identify budesonide epimers and determine their weight ratio directly, without constructing a calibration curve and using any standards. The results of measuring the 22S epimer content by qNMR are comparable with the results of measurements using the reference HPLC method.
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Yan Y, Wang P, Li R, Sun Y, Zhang R, Huo C, Xing J, Dong Y. Synthesis of budesonide conjugates and their anti-inflammatory effects: a preliminary study. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:681-694. [PMID: 30858698 PMCID: PMC6387599 DOI: 10.2147/dddt.s192348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Purpose Budesonide (Bud) is a nonhalogenated glucocorticoid with high anti-inflammatory potency and low systemic side effects. However, the poor water solubility of Bud affects its dissolution and release behavior, thus influencing its anti-inflammatory effect. This study was aimed at synthesizing and evaluating novel conjugates of Bud, hoping to increase the anti-inflammatory activity of Bud by improving its water solubility. Materials and methods Seven novel Bud conjugates (3a-3g) were designed and synthesized in this study. Besides, the equilibrium solubility, cell viability, in vitro and in vivo anti-inflammatory activity, and the hydrolysis behavior of the conjugates in different pH solutions, rat and human plasma, and rat lung homogenate were studied in detail. Results As compared to Bud, the equilibrium solubility of 3a, 3c, and 3e was significantly increased; 3a, 3b, and 3c significantly inhibited the interleukin-6 production in lipopolysaccharide-induced A549 cells; 3a and 3e could significantly decrease the xylene-induced ear edema; and 3a and 3c were gradually and slowly hydrolyzed into Bud in the alveolar fluid and lung homogenate and broken down quickly in plasma. Conclusion The amino acid ester compounds budesonide-21-glycine ester (3a) and budesonide-21-alanine ester (3c) were selected as potential conjugates of Bud. This study would provide a theoretical and an experimental basis for the in vivo process of glucocorticoids and the treatment of inflammatory diseases.
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Affiliation(s)
- Yan Yan
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China, .,Department of Pharmaceutics, School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi, China,
| | - Pengchong Wang
- Department of Pharmaceutics, School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi, China,
| | - Ruiying Li
- Department of Clinical Medicine, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Ying Sun
- Department of Pharmaceutics, School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi, China,
| | - Rui Zhang
- Department of Pharmaceutics, School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi, China,
| | - Chuanchuan Huo
- Department of Pharmaceutics, School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi, China,
| | - Jianfeng Xing
- Department of Pharmaceutics, School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi, China,
| | - Yalin Dong
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China,
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