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Samuelsson J, Leśko M, Thunberg L, Weinmann AL, Limé F, Enmark M, Fornstedt T. Fundamental investigation of impact of water and TFA additions in peptide sub/supercritical fluid separations. J Chromatogr A 2024; 1732:465203. [PMID: 39096781 DOI: 10.1016/j.chroma.2024.465203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Revised: 07/17/2024] [Accepted: 07/20/2024] [Indexed: 08/05/2024]
Abstract
The retention of three peptides was studied under analytical and overloaded conditions at different concentrations of trifluoroacetic acid (TFA) and water added to the co-solvent methanol (MeOH). Four columns with different stationary phase properties, i.e., silica, diol, 2-ethylpyridine and cyanopropyl (CN) columns, were evaluated in this investigation. The overall aim was to get a deeper understanding on how column chemistry as well as water and TFA in the co-solvent affect the analytical and overloaded elution profiles using multivariate design of experiments and adsorption measurements of co-solvent components. Multivariate experimental design modeling indicated that water had on average around five times higher effect on the retention than the addition of TFA. The results also showed that the retention increases with the addition of TFA and water to the co-solvent on all columns except the CN column, on which the retention decreased. When examining the effect of adding water to the co-solvent, evidence of a hydrophilic interaction liquid chromatography (HILIC)-like retention mechanism was found on the three other columns with more polar stationary phases. However, on the CN column water acted as an additive, decreasing the retention due to competition with the peptide for available adsorption surface. Adsorption isotherm measurements of the polar solvent MeOH showed that MeOH adsorbs much weaker on the CN column than on the other columns. Addition of TFA and water to the co-solvent substantially sharpened the elution profiles under both overloaded and analytical conditions. Adding a small amount of TFA (from 0 % to 0.05 %) to the co-solvent substantially improved the peak shape of the elution profiles, while further addition (from 0.05 % to 0.15 %) had only a minor effect on the elution profile shape. The reduced retention on the CN column could not be explained by TFA adsorption, which was very weak on all studied columns (retention factor, 0.05-0.15). One could therefore speculate that the ion-pairing complex formed between the peptide and TFA in the mobile phase, reduce the retention due to its reduced polarity. On the other columns displaying HILIC-like properties, the TFA probably just decreased the pH of the mobile phase, thereby promoting the partitioning of the peptide into the water-rich layer. Finally, peak deformation due to diluent-eluent mismatch was observed under overloaded conditions. This was most severe in the cases where MeOH adsorption to the stationary phase was strong and the peptides were only mildly retained. Adding 1,4-dioxan to the diluent resolved this issue.
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Affiliation(s)
- Jörgen Samuelsson
- Department of Engineering and Chemical Sciences, Karlstad University, Karlstad SE-651 88, Sweden.
| | - Marek Leśko
- Department of Engineering and Chemical Sciences, Karlstad University, Karlstad SE-651 88, Sweden
| | - Linda Thunberg
- Early Chemical Development, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Annika Langborg Weinmann
- Early Chemical Development, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | | | - Martin Enmark
- Department of Engineering and Chemical Sciences, Karlstad University, Karlstad SE-651 88, Sweden
| | - Torgny Fornstedt
- Department of Engineering and Chemical Sciences, Karlstad University, Karlstad SE-651 88, Sweden.
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Li P, Wu DR, Yip SH, Sun D, Pawluczyk J, Smith A, Kempson J, Mathur A. Large-scale purification of a deprotected macrocyclic peptide by supercritical fluid chromatography (SFC) integrated with liquid chromatography in discovery chemistry. J Chromatogr A 2024; 1730:465112. [PMID: 38972253 DOI: 10.1016/j.chroma.2024.465112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/09/2024]
Abstract
A macrocyclic peptide A was successfully purified in large quantities (∼30 g) in >95 % purity by an integrated two-step orthogonal purification process combining supercritical fluid chromatography (SFC) with medium-pressure reverse-phase liquid chromatography (MP-RPLC). MP-RPLC was used to fractionate the crude peptide A, remove unwanted trifluoroacetic acid (TFA) originating from the peptide A cleavage off the resin, and convert the peptide A into ammonium acetate salt form, prior to the final purification by SFC. A co-solvent of methanol/acetonitrile containing ammonium acetate and water in CO2 was developed on a Waters BEH 2-Ethylpyridine column. The developed SFC method was readily scaled up onto a 5 cm diameter column to process multi-gram quantities of the MP-RPLC fraction to reach > 95 % purity with a throughput/productivity of 0.96 g/h. The incorporation of SFC with MP-RPLC has been demonstrated to have a broader application in other large-scale polypeptide purifications.
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Affiliation(s)
- Peng Li
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Dauh-Rurng Wu
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Shiuhang Henry Yip
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA.
| | - Dawn Sun
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Joseph Pawluczyk
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Aaron Smith
- Spectrix, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - James Kempson
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Arvind Mathur
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
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Kozlov O, Hančová E, Cífková E, Lísa M. Comprehensive Single-Platform Lipidomic/Metabolomic Analysis Using Supercritical Fluid Chromatography-Mass Spectrometry. Anal Chem 2024; 96:1320-1327. [PMID: 38193397 DOI: 10.1021/acs.analchem.3c04771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Supercritical fluid chromatography (SFC) is a rapidly expanding technique in the analysis of nonpolar to moderately polar substances and, more recently, also in the analysis of compounds with higher polarity. Herein, we demonstrate a proof of concept for the application of a commercial SFC instrument with electrospray ionization-mass spectrometry (MS) detection as a platform for the comprehensive analysis of metabolites with the full range of polarities, from nonpolar lipids up to highly polar metabolites. The developed single-platform SFC-MS lipidomic/metabolomic method is based on two consecutive injections of lipid and polar metabolite extracts from biphase methyl tert-butyl ether extraction using a diol column and two different gradient programs of methanol-water-ammonium formate modifier. Detailed development of the method focused mainly on the pressure limits of the system, the long-term repeatability of results, and the chromatographic performance, including optimization of the flow rate program, modifier composition and gradient, and injection solvent selection. The developed method enabled fast and comprehensive analysis of lipids and polar metabolites from plasma within a 24 min cycle with two injections using a simple analytical platform based on a single instrument, column, and mobile phase. Finally, the results from SFC-MS analysis of polar metabolites were compared with widely established liquid chromatography MS analysis in metabolomics. The comparison showed different separation selectivity of metabolites using both methods and overall lower sensitivity of the SFC-MS due to the higher flow rate and worse chromatographic performance.
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Affiliation(s)
- Oleksandr Kozlov
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanského 62, Hradec Králové 50003, Czech Republic
| | - Eliška Hančová
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanského 62, Hradec Králové 50003, Czech Republic
| | - Eva Cífková
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanského 62, Hradec Králové 50003, Czech Republic
| | - Miroslav Lísa
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanského 62, Hradec Králové 50003, Czech Republic
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4
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Neumann J, Schmidtsdorff S, Schmidt AH, Parr MK. Controlling the elution order of insulin and its analogs in sub-/supercritical fluid chromatography using methanesulfonic acid and 18-crown-6 as mobile phase additives. J Sep Sci 2023; 46:e2300520. [PMID: 37775313 DOI: 10.1002/jssc.202300520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 10/01/2023]
Abstract
The purity analysis of therapeutic peptides can often be challenging, demanding the application of more than a single analytical technique. Supercritical fluid chromatography nowadays is a promising alternative to reversed-phase liquid chromatography, providing orthogonal and complementary information. This study investigated its applicability for the separation of human insulin, its analogs and degradation products. A previously published method development protocol for peptides up to 2000 Da was successfully applied to the higher molecular weight insulins (6 kDa). A single gradient method was optimized for all insulins using a Torus DEA column (100 × 3.0 mm, 1.7 μm), carbon dioxide and a modifier consisting of methanol/acetonitrile/water/methanesulfonic acid (65:35:2:0.1, v/v/v/v). Consecutively, the crown ether 18-crown-6, which is well known to complex charged lysine sidechains and other amino functionalities, was added to the modifier to evaluate its impact on selectivity. A decreased retention and a shift in the elution order for the insulins were observed. An inverse effect on retention was found when combined with a neutral stationary phase chemistry (Viridis BEH).
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Affiliation(s)
- Jonas Neumann
- Department of Biology, Chemistry, and Pharmacy, Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
- Chromicent GmbH, Berlin, Germany
| | - Sebastian Schmidtsdorff
- Department of Biology, Chemistry, and Pharmacy, Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
- Chromicent GmbH, Berlin, Germany
| | | | - Maria K Parr
- Department of Biology, Chemistry, and Pharmacy, Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
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Hayashida M, Suzuki R, Horie S, Masuda J, Yamaguchi T, Obika S. Applicability of supercritical fluid chromatography for oligonucleotide analysis: A proof-of-concept study. J Chromatogr A 2023; 1708:464333. [PMID: 37660558 DOI: 10.1016/j.chroma.2023.464333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 08/10/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023]
Abstract
We evaluated the suitability of supercritical fluid chromatography (SFC) for oligonucleotide analysis using 4-mer oligonucleotides with various phosphorothioate (PS) contents as model compounds. Column screening showed that the diol-modified column was able to separate sequences with different PS contents. Optimization of the column body and additives allowed us to analyze polar oligonucleotides using SFC. Various sequences were also analyzed using the optimized method. A good peak shape was obtained when the guanine plus cytosine content of the analyte was two or less in the 4-mer oligonucleotides. Furthermore, we found that the retention times of the selected sequences were positively correlated with polar surface areas, indicating that oligonucleotides interact with polar stationary phases. In contrast, more hydrophobic full PS sequences were retained more strongly in the diol column than the full phosphodiester (PO) sequences. This suggests that the diol column has unique selectivity for PO and PS linkages. These results indicate that SFC is potentially applicable to oligonucleotide analysis with a separation mechanism that is different from that of ion-pair reversed-phase liquid chromatography.
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Affiliation(s)
- Momoka Hayashida
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan; Shimadzu Analytical Innovation Research Laboratories, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan
| | - Risa Suzuki
- Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan
| | - Shinnosuke Horie
- Shimadzu Analytical Innovation Research Laboratories, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan; Shimadzu Europa GmbH, Albert-Hahn-Strasse 6-10, Duisburg 47269, Federal Republic of Germany
| | - Junichi Masuda
- Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan
| | - Takao Yamaguchi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Satoshi Obika
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
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6
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Neumann J, Schmidtsdorff S, Schmidt AH, Parr MK. Ternary eluent compositions in supercritical fluid chromatography improved fingerprinting of therapeutic peptides. J Sep Sci 2023; 46:e2201007. [PMID: 36601991 DOI: 10.1002/jssc.202201007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 12/30/2022] [Accepted: 12/31/2022] [Indexed: 01/06/2023]
Abstract
Currently, little information has been published on the application of ternary eluent compositions in supercritical fluid chromatography for separating peptides. This work investigates the benefits of adding acetonitrile to methanol as the modifier. Three cyclic antibiotic peptides (bacitracin, colistin, and daptomycin) ranging between 1000 and 2000 Da were chosen as model substances. The ternary mixture of carbon dioxide, methanol, and acetonitrile is optimized to increase the resolution of the peptide's fingerprint. In addition, varying compositions of methanol and acetonitrile were found to change the elution order of the analytes, which is a valuable tool during method development. An individual gradient method using two Torus 2-PIC columns (each 100 × 3.0 mm, 1.7 μm), carbon dioxide, and a modifier consisting of acetonitrile/methanol/water/methanesulfonic acid (60:40:2:0.1, v:v:v:v) was optimized for each of the peptides. Subsequently, a generic method development protocol applicable to polypeptides is proposed.
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Affiliation(s)
- Jonas Neumann
- Department of Biology, Chemistry and Pharmacy, Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany.,Chromicent GmbH, Berlin, Germany
| | - Sebastian Schmidtsdorff
- Department of Biology, Chemistry and Pharmacy, Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany.,Chromicent GmbH, Berlin, Germany
| | | | - Maria K Parr
- Department of Biology, Chemistry and Pharmacy, Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
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7
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Li C, Xiao J, Wu S, Liu L, Zeng X, Zhao Q, Zhang Z. Clinical application of serum-based proteomics technology in human tumor research. Anal Biochem 2023; 663:115031. [PMID: 36580994 DOI: 10.1016/j.ab.2022.115031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/20/2022] [Accepted: 12/24/2022] [Indexed: 12/27/2022]
Abstract
The rapid development of proteomics technology in the past decades has led to further human understanding of tumor research, and in some ways, the technology plays a very important supporting role in the early detection of tumors. Human serum has been shown to contain a variety of proteins closely related to life activities, and the dynamic change in proteins can often reflect the physiological and pathological conditions of the body. Serum has the advantage of easy extraction, so the application of proteomics technology in serum has become a hot spot and frontier area for the study of malignant tumors. However, there are still many difficulties in the standardized use of proteomic technologies, which inevitably limit the clinical application of proteomic technologies due to the heterogeneity of human proteins leading to incomplete whole proteome populations, in addition to most serum protein markers being now not highly specific in aiding the early detection of tumors. Nevertheless, further development of proteomics technologies will greatly increase our understanding of tumor biology and help discover more new tumor biomarkers with specificity that will enable medical technology.
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Affiliation(s)
- Chen Li
- Department of Pathology, The First Affiliated Hospital of University of South China, Hunan, Hengyang, 421001, Hunan Province, China
| | - Juan Xiao
- Department of Otorhinolaryngology, The Second Affiliated Hospital of University of South China, Hunan, Hengyang, 421001, Hunan Province, China
| | - Shihua Wu
- Department of Pathology, The Second Hospital of Shaoyang College, Hunan, Shaoyang, 422000, Hunan Province, China
| | - Lu Liu
- Department of Pathology, The First Affiliated Hospital of University of South China, Hunan, Hengyang, 421001, Hunan Province, China
| | - Xuemei Zeng
- Cancer Research Institute of Hengyang Medical College, University of South China, Key Laboratory of Cancer Cellular and Molecular Pathology in Hunan Province, Hunan, Hengyang, 421001, China
| | - Qiang Zhao
- Department of Pathology, The First Affiliated Hospital of University of South China, Hunan, Hengyang, 421001, Hunan Province, China.
| | - Zhiwei Zhang
- Department of Pathology, The First Affiliated Hospital of University of South China, Hunan, Hengyang, 421001, Hunan Province, China; Cancer Research Institute of Hengyang Medical College, University of South China, Key Laboratory of Cancer Cellular and Molecular Pathology in Hunan Province, Hunan, Hengyang, 421001, China.
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8
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Molineau J, Hideux M, Hennig P, Bertin S, Mauge F, Lesellier E, West C. Effect of dilution solvent and injection volume on the analysis of basic hydrophilic therapeutic polypeptide salts with pressurized carbon dioxide mobile phases. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1213:123519. [DOI: 10.1016/j.jchromb.2022.123519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/29/2022] [Accepted: 11/01/2022] [Indexed: 11/07/2022]
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9
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Deidda R, Losacco GL, Schelling C, Regalado EL, Veuthey JL, Guillarme D. Sub/supercritical fluid chromatography versus liquid chromatography for peptide analysis. J Chromatogr A 2022; 1676:463282. [DOI: 10.1016/j.chroma.2022.463282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/22/2022] [Accepted: 06/24/2022] [Indexed: 10/17/2022]
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10
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Lipka E. Contribution of supercritical fluid chromatography to serially coupling columns for chiral and achiral separations. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Fornstedt T, Enmark M, Samuelsson J. Method transfer in SFC from a fundamental perspective. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Broeckhoven K. Advances in the limits of separation power in supercritical fluid chromatography. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2021.116489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Beres M. Expanding the boundaries of SFC: Analysis of biomolecules. SEP SCI TECHNOL 2022. [DOI: 10.1016/b978-0-323-88487-7.00011-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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14
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Measurements of drugs and metabolites in biological matrices using SFC and SFE-SFC-MS. SEP SCI TECHNOL 2022. [DOI: 10.1016/b978-0-323-88487-7.00004-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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15
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Jambo H, Hubert P, Dispas A. Supercritical fluid chromatography for pharmaceutical quality control: Current challenges and perspectives. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2021.116486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Losacco GL, Veuthey JL, Guillarme D. Metamorphosis of supercritical fluid chromatography: A viable tool for the analysis of polar compounds? Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116304] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Li P, Yip H, Sun D, Kempson J, Caceres-Cortes J, Mathur A, Wu DR. Sub/supercritical Fluid Chromatography Purification and Desalting of a Cyclic Dinucleotide STING Agonist. J Chromatogr A 2021; 1652:462356. [PMID: 34218126 DOI: 10.1016/j.chroma.2021.462356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/10/2021] [Accepted: 06/14/2021] [Indexed: 10/21/2022]
Abstract
An efficient and "endotoxin-free" purification of a cyclic dinucleotide (CDN) STING agonist was achieved to produce multigram quantities of pure BMT-390025, an active pharmaceutical ingredient (API), for toxicological studies. A two-step sub/supercritical fluid chromatography (SFC) procedure was developed for the achiral purification and desalting of the polar ionic CDN. A robust SFC process employing methanol-acetonitrile-water with ammonium acetate as co-solvent in CO2 on BEH 2-ethylpyridine was established and scaled up as the first step to achieve a successful purification. The desalting/salt-switching (i.e. removing acetate and acetamide) was conducted using methanol-water with ammonium hydroxide as co-solvent on the same column in the second step to convert the final API to the ammonium salt. Water with additive was essential to eliminating salt precipitation and improving the peak shape and resolution. Due to the extreme hydrophilicity of BMT-390025, 65% of co-solvent was needed to adequately elute the target in both steps. More than 40 g of crude API was purified and desalted producing >20 g of pure BMT-390025 as the ammonium salt which was obtained with a chemical purity of >98.5% and met the endotoxin requirement of <0.1 EU/mg. In addition, >80 g of its penultimate prior to the deprotection of the silyl group was purified at a high throughput of 6.3 g/h (0.42 g/day/g SP).
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Affiliation(s)
- Peng Li
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States.
| | - Henry Yip
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States.
| | - Dawn Sun
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - James Kempson
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - Janet Caceres-Cortes
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - Arvind Mathur
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - Dauh-Rurng Wu
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
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