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Špičáková A, Kraus P, Gucký T, Kryštof V, Strnad M, Bazgier V, Otyepka M, Kubíčková V, Poruba M, Rácová Z, Zapletalová I, Anzenbacher P. In vitro and in silico studies of interaction of synthetic 2,6,9-trisubstituted purine kinase inhibitors BPA-302, BP-21 and BP-117 with liver drug-metabolizing cytochromes P450. Physiol Res 2020; 69:S627-S636. [PMID: 33646005 DOI: 10.33549/physiolres.934611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
An evaluation of possible interactions with enzymes of drug metabolism (cytochromes P450, CYP) is an important part of studies on safety and, in general, on the properties of any drug or biologically active compound. The article is focused on the preliminary metabolic study of selected 2,6,9-trisubstituted purine kinase inhibitors with significant anticancer activities which we have developed. The compounds BP-21 and BP-117 represent strong CDK inhibitors and the compound BPA-302 was developed as selective FLT3-ITD kinase inhibitor. Here, emphasis is placed on interactions of these compounds with the nine most important forms of CYP to evaluate the possibility of inhibition of these enzymes. The possibility of their inhibitory effect was studied in vitro on selected human liver microsomal CYP enzymes. The most affected enzyme was CYP2C19. Its activity dropped to 22 % of its original value by BPA 302, to 13 % by BP-21 and to 6 % by BP-117 at the highest concentration tested (250 µmol·l(-1)). The results suggest that the metabolism of concomitantly administered drugs should not be significantly affected at lower doses. Molecular docking of BPA-302 indicated that it can bind to active site of both CYP2C19 and CYP2D6 enzymes above the heme cofactor corroborating the experimental data.
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Affiliation(s)
- A Špičáková
- Department of Pharmacology, Faculty of Medicine, Palacký University Olomouc, Czech Republic.
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Kubíčková V, Urbánek K. [Pharmacokinetics and therapeutic monitoring of piperacillin/tazobactam]. Klin Mikrobiol Infekc Lek 2020; 26:86-94. [PMID: 33418596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Given their wide therapeutic index, beta-lactam antibiotics are commonly used to treat critically ill patients. It is in these patients that significant heterogeneity in pharmacokinetics was noted, compared to the population average, especially in the volume of distribution, drug clearance and biological half-life, with values increasing as much as two-fold or, in the case of biological half-life, as much as four-fold. Significant pharmacokinetic changes also occur in cases of morbid obesity or renal insufficiency and when complex surgical techniques such as extracorporeal circulation are used. Therapeutic monitoring of piperacillin/tazobactam is a way to personalize and optimize therapy for these groups of patients. Preclinical data show a correlation between the probability of therapeutic success and concentrations of the unbound fraction of an antibiotic exceeding the minimum inhibitory concentration (MIC) for 40-50 % of the dosing interval. This time appears to be the preferred pharmacodynamic target for beta-lactam antibiotics. In critically ill patients, however, an even higher target may be required, ideally 100 % fT > 4xMIC. A better pharmacodynamic profile can be obtained using prolonged or continuous infusion. The biggest obstacle to routine TDM in β-lactams is the speed of quality sample determination. Currently, the most widely used method of measuring plasma concentrations is liquid chromatography coupled with UV or MS detection.
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Affiliation(s)
- Veronika Kubíčková
- Department of Pharmacology, Faculty of Medicine and Dentistry in Olomouc, e-mail:
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Spurná J, Karásek D, Kubíčková V, Goldmannová D, Krystyník O, Schovánek J, Zadražil J. Relationship of Selected Adipokines with Markers of Vascular Damage in Patients with Type 2 Diabetes. Metab Syndr Relat Disord 2018; 16:246-253. [PMID: 29717906 DOI: 10.1089/met.2017.0179] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND In this study we compared levels of selected adipokines between patients with type 2 diabetes (T2D) and healthy individuals and we determined their relationship with early vascular damage markers. METHODS Seventy-seven subjects: 56 patients with T2D (34 men and 22 women) and 21 healthy controls (8 men and 13 women) were examined in this cross-sectional study. Selected adipokines [adiponectin, adipocyte fatty acid-binding protein (A-FABP), fibroblast growth factor 21 (FGF-21), C1q/TNF-related protein 9 (CTRP-9), and allograft inflammatory factor-1 (AIF-1)] with possible cardiovascular impact were measured in all participants. To identify markers of vascular damage von Willebrand factor (vWF), plasminogen activator inhibitor-1 (PAI-1) and arterial stiffness parameters were examined in all the subjects. RESULTS When compared with healthy controls, T2D had significantly higher levels of A-FABP [50.0 (38.1-68.6) vs. 28.6 (23.6-32.9) ng/mL, P < 0.0001] and lower levels of adiponectin [5.9 (4.3-9.0) vs. 11.3 (8.7-14.8) μg/mL, P < 0.0001]. Differences in other adipokines were not statistically significant. Adiponectin level correlated negatively with vWF levels (ρ = -0.29, P < 0.05) and PAI-1 (ρ = -0.36, P < 0.05) and A-FABP positively with vWF (ρ = 0.61, P < 0.05) and PAI-1 (ρ = 0.47, P < 0.05) and augmentation index (ρ = 0.26, P < 0.05). Multivariate regression analysis showed independent association between A-FABP and vWF (b = 0.24, P < 0.05). CONCLUSIONS Patients with T2D have significantly higher levels of A-FABP and lower levels of adiponectin. These adipokines correlate with indicators of vascular damage and could contribute to cardiovascular risk in patients with T2D. A-FABP may participate in direct endothelium damage.
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Affiliation(s)
- Jaromíra Spurná
- 1 Department of Internal Medicine III-Nephrology, Rheumatology and Endocrinology, University Hospital Olomouc , Olomouc, Czech Republic .,2 Faculty of Medicine and Dentistry, Palacky University Olomouc , Olomouc, Czech Republic
| | - David Karásek
- 1 Department of Internal Medicine III-Nephrology, Rheumatology and Endocrinology, University Hospital Olomouc , Olomouc, Czech Republic .,2 Faculty of Medicine and Dentistry, Palacky University Olomouc , Olomouc, Czech Republic
| | - Veronika Kubíčková
- 2 Faculty of Medicine and Dentistry, Palacky University Olomouc , Olomouc, Czech Republic .,3 Department of Clinical Biochemistry University Hospital Olomouc , Olomouc, Czech Republic
| | - Dominika Goldmannová
- 1 Department of Internal Medicine III-Nephrology, Rheumatology and Endocrinology, University Hospital Olomouc , Olomouc, Czech Republic .,2 Faculty of Medicine and Dentistry, Palacky University Olomouc , Olomouc, Czech Republic
| | - Ondřej Krystyník
- 1 Department of Internal Medicine III-Nephrology, Rheumatology and Endocrinology, University Hospital Olomouc , Olomouc, Czech Republic .,2 Faculty of Medicine and Dentistry, Palacky University Olomouc , Olomouc, Czech Republic
| | - Jan Schovánek
- 1 Department of Internal Medicine III-Nephrology, Rheumatology and Endocrinology, University Hospital Olomouc , Olomouc, Czech Republic .,2 Faculty of Medicine and Dentistry, Palacky University Olomouc , Olomouc, Czech Republic
| | - Josef Zadražil
- 1 Department of Internal Medicine III-Nephrology, Rheumatology and Endocrinology, University Hospital Olomouc , Olomouc, Czech Republic .,2 Faculty of Medicine and Dentistry, Palacky University Olomouc , Olomouc, Czech Republic
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Vaverková H, Karásek D, Halenka M, Cibíčková L, Kubíčková V. Inverse association of lipoprotein (a) with markers of insulin resistance in dyslipidemic subjects. Physiol Res 2017; 66:S113-S120. [PMID: 28379036 DOI: 10.33549/physiolres.933583] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Lipoprotein (a) [Lp(a)] is an LDL-like particle that contains an apolipoprotein B100 molecule covalently bound to a plasminogen-like glycoprotein, apolipoprotein (a) [apo(a)]. Epidemiological evidence supports a direct and causal association between Lp(a) levels and coronary risk. On the contrary, a few prospective findings demonstrate inverse association of Lp(a) levels with risk of type 2 diabetes (T2DM). The aim of our study was to evaluate the association of Lp(a) with indicators of insulin resistance (IR) and metabolic syndrome (MS), which precede development of T2DM. We enrolled 607 asymptomatic dyslipidemic subjects (295 men and 312 women, mean age 45.6+/-14.0 years) into our cross-sectional study. Lp(a) concentrations correlated inversely with TG, AIP, insulin, HOMA, C-peptide, BMI, waist circumference, and number of MS components (p<0.01 for all). Subjects with MS had significantly lower Lp(a) concentrations in comparison with those without the presence of this phenotype (p<0.0001). Serum concentrations of Lp(a) in the lower (1(th)-3(rd)) quartiles of insulin and HOMA were significantly higher than in the 4(th) quartile of these insulin resistance markers (p<0.001). Odds ratios of having increased markers of IR (TG, HOMA) and MS in top quartile of Lp(a) also indicate inverse association of Lp(a) with IR. The results of our study support an inverse association of Lp(a) levels with IR and MS that precedes overt T2DM diagnosis.
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Affiliation(s)
- H Vaverková
- Third Department of Internal Medicine - Nephrology, Rheumatology and Endocrinology, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic.
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Abstract
Hyperuricemia has been described as associated with the risk of development metabolic syndrome; however the relationship between the uric acid level and particular parameters of metabolic syndrome remained unclear. We performed a cross-sectional study on a cohort of 833 dyslipidemic patients and correlated their levels of uric acid with parameters of insulin resistance, lipid metabolism, C-reactive protein, anthropometric parameters. We also defined patients with hypertriglyceridemic waist phenotype and compered their uric acid levels with those without this phenotype. We found that levels of uric acid are associated with parameters of metabolic syndrome. Specifically, dyslipidemia characteristic for metabolic syndrome (low HDL-cholesterol and high triglycerides) correlates better with uric acid levels than parameters of insulin resistance. Also waist circumference correlates better with uric acid levels than body mass index. Patients with hypertriglyceridemic waist phenotype had higher levels of uric acid when compared with patients without this phenotype. Serum uric acid levels are even in low levels linearly correlated with parameters of metabolic syndrome (better with typical lipid characteristics than with parameters of insulin resistance) and could be associated with higher cardiovascular risk.
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Affiliation(s)
- Ľ Cibičková
- Department of Internal Medicine III - Nephrology, Rheumatology and Endocrinology, University Hospital, Olomouc, Czech Republic.
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Kral M, Śaňák D, Veverka T, Hutyra M, Vindiš D, Bártková A, Dorňák T, Švábová M, Kubíčková V, Zapletalová J, Herzig R, Školoudík D, Kaňovský P. Troponin-T in acute ischemic stroke patients/INS; — /INS;Results of the prospective history study. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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