1
|
Veseli E, Veseli A, Tovani-Palone MR. Dementia and AI. Br Dent J 2024; 236:668. [PMID: 38730140 DOI: 10.1038/s41415-024-7411-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 04/10/2024] [Indexed: 05/12/2024]
Affiliation(s)
- E Veseli
- Department of Prosthodontics, Dental School, Faculty of Medicine, University of Pristina, Pristina, Kosovo.
| | - A Veseli
- School of Dental Medicine, Dental Science, University of Zagreb, Zagreb, Croatia.
| | - M R Tovani-Palone
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, India.
| |
Collapse
|
2
|
Veseli E, Behluli E, Breznica E, Veseli A. Artificial tongue: a promising solution for early detection and treatment of oral bacterial infections. Eur Arch Paediatr Dent 2024:10.1007/s40368-024-00899-2. [PMID: 38602646 DOI: 10.1007/s40368-024-00899-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 03/22/2024] [Indexed: 04/12/2024]
Affiliation(s)
- E Veseli
- Department of Prosthodontics, Dental School, Faculty of Medicine, University of Pristina, Pristina, Kosovo
| | - E Behluli
- Department of Periodontology and Oral Medicine, Dental School, Faculty of Medicine, University of Pristina, Pristina, Kosovo
| | | | - A Veseli
- School of Dental Medicine, Dental Science, University of Zagreb, Zagreb, Croatia
| |
Collapse
|
3
|
Jireš J, Douša M, Gibala P, Doubský J, Pěček D, Mervart D, Kluk A, Veseli A, Kalášek S, Řezanka P. Comprehensive UHPLC-MS screening methods for the analysis of triazolopyrazine precursor and its genotoxic nitroso-derivative in sitagliptin pharmaceutical formulation. J Pharm Biomed Anal 2024; 238:115861. [PMID: 37976984 DOI: 10.1016/j.jpba.2023.115861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/27/2023] [Accepted: 11/07/2023] [Indexed: 11/19/2023]
Abstract
A case study on Sitagliptin drug products and Sitagliptin/Metformin drug products concerning contamination with N-nitrosamines was performed using two newly developed analytical methods for determination of N-nitroso-triazolopyrazine (NTTP; 7-nitroso-3-(trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine) and its precursor triazolopyrazine (3-(trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine). The method for determination of triazolopyrazine was previously unpublished, the method for determination of NTTP was published only for analysis of active pharmaceutical ingredient Sitagliptin and not the drug forms. Solving the N-nitrosamine contamination is requested by regulatory authorities all over the world and thus is vital for all pharmaceutical companies. The solution always requires a sensitive analytical method. Both newly developed methods use liquid chromatography coupled with mass spectrometry (single quadrupole analyzer in case of triazolopyrazine and triple quadrupole analyzer in case of NTTP). Separation of triazolopyrazine was achieved on a column Acquity CSH C18 using a mobile phase consisting of aqueous ammonium formate buffered at pH 4.2 and acetonitrile. Detection was performed using positive electrospray and selected ion monitoring at m/z 193. Separation of NTTP was achieved on a column Acquity HSS T3 using a mobile phase consisting of 0.1 % formic acid in water and methanol. Detection was performed using positive electrospray and multiple reaction monitoring at transitions m/z 222.15→42.05 (collision energy 17 eV) and m/z 222.15→192.15 (collision energy 11 eV). Two issues specific to NTTP and triazolopyrazine previously not described in scientific literature were successfully troubleshooted. Spontaneous degradation of Sitagliptin to triazolopyrazine and methyl (R)-3-amino-4-(2,4,5-trifluorophenyl)butanoate was solved by using N,N-dimethylformamide as sample solvent during development of the method for quantitation of triazolopyrazine. A bad peak shape of NTTP due to the presence of rotamers of NTTP was successfully troubleshooted by increasing column temperature. Both methods were used during an optimization study of manufacturing of Sitagliptin and Sitagliptin/Metformin drug products. The goal of the study was to decrease NTTP content in the final drug product under the strict legislative limit set by Federal Drug Agency. The efficacy of several solutions was proven, but could not be fully disclosed due to Intellectual Property Protection policy of Zentiva. Instead, a brief review of recently published strategies to cope with N-nitrosamine contamination is presented.
Collapse
Affiliation(s)
- Jakub Jireš
- Department of Analytical chemistry, Faculty of Chemical Engineering, UCT Prague, Technická 5, Prague 6 166 28, Czech Republic; Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Michal Douša
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic.
| | - Petr Gibala
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Jan Doubský
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Daniel Pěček
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - David Mervart
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Anna Kluk
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Ardita Veseli
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic; Department of Biopharmaceutics and Pharmacokinetics, Faculty of Pharmacy, University of Ljubljana, Aškerčeva cesta 7, Ljubljana 1000, Slovenia
| | - Stanislav Kalášek
- Zentiva, k.s. Praha, U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Pavel Řezanka
- Department of Analytical chemistry, Faculty of Chemical Engineering, UCT Prague, Technická 5, Prague 6 166 28, Czech Republic
| |
Collapse
|
4
|
Veseli A, Kristl A, Akelj S. Proof-of-concept for a miniaturized shake-flask biopharmaceutical solubility determination by sonic mixing. Pharmazie 2020; 75:626-631. [PMID: 33303054 DOI: 10.1691/ph.2020.0063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
The solvent volume must be very small to obtain biopharmaceutically relevant drug solubility data with low consumption of the solid sample which is often in low supply during early drug development. However, the adequate and repeatable mixing of a small volume can be challenging. We therefore developed a straightforward technique based on the shake-flask method which employed only sonication for mixing a very small amount of drug in an aqueous solvent at a stable pH and temperature. To test the technique, the solubilities of the model compounds carvedilol, digoxin, propranolol, theophylline, and verapamil were determined. The determined solubility values agreed well with the conventional shake-flask solubility data obtained in our laboratory and previously published literature data. The time necessary for the measurements (24 h), was shown to be similar to the conventional shake-flask method even for the low solubility drugs digoxin and carvedilol. The solubility - pH dependence can be established very well as shown with verapamil and propranolol and confirmed with a pH in-dependent solubility of theophylline.
Collapse
|
5
|
Masseli F, Veseli A, Treede H, Schiller W. Blood Group AB Is Associated with Decreased Blood Loss but also Worse Outcome in Aortocoronary Bypass Surgery. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
6
|
Abstract
The significance of thermodynamic solubility in biopharmaceutical compound or drug characterization as well as the importance of having methods that accurately establish it have been extensively addressed. Nonetheless, its precise determination continues to remain a challenging task to accomplish. Even more so when the number of compounds to evaluate is high and the available amount of each compound is low, both of which are inevitable for the compound characterization during the drug development process. Except for the shake-flask method which is still considered as the 'gold standard' in obtaining thermodynamic data, it is currently difficult to say that another satisfactory model which is routinely used to determine thermodynamic solubility is being applied. Therefore, this review summarizes the various experimental approaches which are based on the classical shake flask method but have yet attempted to speed up the experimental process of obtaining such data more conveniently. The most important experimental features of these approaches are provided to the reader. Some advantages and disadvantages associated with each approach are also highlighted, consequently offering a resource to those looking for the most appropriate of the approaches that have already fared well at determining the biopharmaceutically relevant drug solubility.
Collapse
Affiliation(s)
- Ardita Veseli
- Department of Biopharmaceutics and Pharmacokinetics, Faculty of Pharmacy, University of Ljubljana , Ljubljana , Slovenia
| | - Simon Žakelj
- Department of Biopharmaceutics and Pharmacokinetics, Faculty of Pharmacy, University of Ljubljana , Ljubljana , Slovenia
| | - Albin Kristl
- Department of Biopharmaceutics and Pharmacokinetics, Faculty of Pharmacy, University of Ljubljana , Ljubljana , Slovenia
| |
Collapse
|