A novel preliminary metabolomic panel for IHD diagnostics and pathogenesis.

Cardiovascular disease (CVD) represents one of the main causes of mortality worldwide and nearly a half of it is related to ischemic heart disease (IHD). The article represents a comprehensive study on the diagnostics of IHD through the targeted metabolomic profiling and machine learning techniques. A total of 112 subjects were enrolled in the study, consisting of 76 IHD patients and 36 non-CVD subjects. Metabolomic profiling was conducted, involving the quantitative analysis of 87 endogenous metabolites in plasma. A novel regression method of age-adjustment correction of metabolomics data was developed. We identified 36 significantly changed metabolites which included increased cystathionine and dimethylglycine and the decreased ADMA and arginine. Tryptophan catabolism pathways showed significant alterations with increased levels of serotonin, intermediates of the kynurenine pathway and decreased intermediates of indole pathway. Amino acid profiles indicated elevated branched-chain amino acids and increased amino acid ratios. Short-chain acylcarnitines were reduced, while long-chain acylcarnitines were elevated. Based on these metabolites data, machine learning algorithms: logistic regression, support vector machine, decision trees, random forest, and gradient boosting, were used for IHD diagnostic models. Random forest demonstrated the highest accuracy with an AUC of 0.98. The metabolites Norepinephrine; Xanthurenic acid; Anthranilic acid; Serotonin; C6-DC; C14-OH; C16; C16-OH; GSG; Phenylalanine and Methionine were found to be significant and may serve as a novel preliminary panel for IHD diagnostics. Further studies are needed to confirm these findings.

[Assessment of systemic inflammation activity, myocardial structure and functional features, their relationship in patients with multiple myeloma, receiving bortezomib therapy].

AIM: To study the dynamics of calculated indices [neutrophil-lymphocyte ratio (NLR); systemic inflammation index (SIV)] and biomarkers of systemic inflammation [interleukin-1ß (IL-1ß); high-sensitivity C-reactive protein (hsCRP)], parameters of the structure-and-function state of the myocardium and intracardiac hemodynamics, and their relationship in patients newly diagnosed with multiple myeloma (MM) at the onset of the disease and after 6 courses of chemotherapy (CT) containing the proteasome inhibitor bortezomib. MATERIAL AND METHODS: This prospective study included 30 patients aged 63.8±10.0 years diagnosed with MM; 17 (56.7 %) of them were men. The following tests were performed for all patients: measurement of IL-1ß and hsCRP, calculation of the inflammation indexes NLR and SIV, transthoracic echocardiography before and after 6 courses of bortezomib-containing CT. At the time of study completion, 9 patients dropped out due to reasons not related to cardiovascular complications of CT. RESULTS: The antitumor therapy was associated with increases of immune-inflammation indexes: NLR increased from 1.54 [1.02; 1.83] to 2.9 [1.9; 4.35] (p=0.009) and SIV increased from 402.95 [230.5; 534.0] to 1102.2 [453.1; 1307.9] (р=0.014). IL-1ß increased from 5.15 [4.05; 5.77] to 6.22 [5.66; 6.52] pg/ml remaining within the reference range (p=0.142) whereas hsCRP decreased from 1.02 [0.02; 2.71] to 0.02 [0.02; 0.82] IU/l (p=0.138). Statistically significant changes in parameters of heart remodeling and clinical picture of cardiovascular complications were not observed. A correlation analysis showed significant inverse correlations of hsCRP with left ventricular ejection fraction (LV EF) (r= -0.557; p=0.003), the number of plasma cells (PC) with LV EF (r= -0.443; p=0.023), and a direct correlation of the number of PC with hsCRP (r=0.433; p=0.022). CONCLUSION: During the study, the accepted criteria for cardiotoxicity of bortezomib-containing chemotherapy in patients with MM, were not met. The identified correlations between the level of markers for acute inflammation, indexes of intracardiac hemodynamics, and the immediate MM substrate may indicate the role of chronic low-intensity inflammation in the pathogenesis of myocardial remodeling in patients with MM. This necessitates further studies on larger samples of patients to assess the prognostic significance.

[Determination of zaleplon and clobazam by high performance liquid chromatography - high resolution tandem mass spectrometry using Orbitrap technology]. / Opredelenie zaleplona i klobazama metodom vysokoeffektivnoi zhidkostnoi khromatografii ­ tandemnoi mass-spektrometrii s vysokim razresheniem s ispol'zovaniem tekhnologii Orbitrap.

THE AIM OF THE STUDY: Was to develop a method for the qualitative and quantitative determination of benzodiazepine receptor agonists (zaleplon and clobazam), taking into account different chemical structures, by high-performance liquid chromatography-high-resolution tandem mass spectrometry using Orbitrap technology for the purposes and tasks of forensic medical examination. A method has been developed for the identification and quantitative determination of zaleplon and clobazam by high-performance liquid chromatography-high-resolution tandem mass spectrometry using Orbitrap technology. The proposed identification method can be used in the future to form a database of domestic mass spectra for potent and narcotic substances.

[Authentication study of the preparation 'Avastin' by means of chemical-toxicological analysis]. / Issledovanie podlinnosti preparata 'Avastin' metodami khimiko-toksikologicheskogo analiza.

Falsification and use of low-quality drugs of biological origin creates a threat to public health. To a greater extent, costly drugs, including bevacizumab, are exposed to similar abuses. Timely determination of cases of forgery or the improper clinical use of monoclonal antibody preparations is one of the necessary measures that can be taken to limit the risks and preserve the health of patients. This paper presents the results of the investigation of the bevacizumab preparation 'Avastin', which was withdrawn from ophthalmic clinical practice in the course of the investigation. We compared the qualitative and quantitative composition of the drug samples, which were determined using commonly available methods of chemical and toxicological analysis.