Lyazat Ibrayeva

Prof. Dr. Lyazat Ibrayeva

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Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 April 2017 in International Journal of Occupational and Environmental Health
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Journal Article
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KSKanat Sakiev
Kanat Sakiev
SBSharbanu Battakova
Sharbanu Battakova
ZNZulkiya Namazbaeva
Zulkiya Namazbaeva
LILyazat Ibrayeva
Lyazat Ibrayeva
LILyazat Ibrayeva
Lyazat Ibrayeva
ZSZhanbol Sabirov
Zhanbol Sabirov
Background: The Aral Sea crisis has led to harmful effects on human habitat. In recent years, mild cognitive impairment is a growing problem. Objectives: This article provides the results of studying the neuropsychological state of residents living in the crisis zone of the Aral Sea region in the case of Shalkar city. We have provided an assessment of the neuropsychological state of examined population and determined the leading pathology in this region. Methods: The survey sample included 344 persons of reproductive age from 21 to 45 years. We have obtained results in biochemical studies, indicating perturbations of proteometabolism and lipid metabolism. Results: A correlation analysis showed dependence between a decrease of albumin and high-density lipoproteins, an increase of low-density lipoproteins and parameters of cognitive function. Conclusions: The research suggests a high prevalence of cerebrovascular pathology among the population, changes in cognitive function parameters, long-term and short-term memory problems and high levels of depression.

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Journal Article
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LILyazat Ibrayeva
Lyazat Ibrayeva
MAMeruyert Aubakirova
Meruyert Aubakirova
BIBacheva Irina
Bacheva Irina
AAAssel Alina
Assel Alina
NBNazira Bazarova
Nazira Bazarova
AMAskhat Murzabaeyev
Askhat Murzabaeyev
Background/Objectives: This study aims to investigate the potential etiopathogenesis of HFpEF development and identify possible different phenotypes of HFpEF in patients with chronic obstructive pulmonary disease (COPD) and systemic sclerosis-associated interstitial lung diseases (SS-ILDs). It could help clinicians improve early HFpEF personalized detection and management. Methods: This study included 150 patients with chronic lung diseases (CLDs), such as COPD and SS-ILD, who were outside of exacerbation, had no history of chronic heart failure (CHF), and had a left ventricular ejection fraction (LV EF) of ≥50%. The functional status of the lungs, heart, endothelial dysfunction, and acid–base balance was assessed. The results obtained were compared in groups of patients with CLD depending on the presence or absence of HF with preserved ejection fraction (HFpEF). The diagnosis of HFpEF was established based on the HFA-PEFF Score classification. Nonparametric statistical methods were used. Results: In patients with CLD, indicators such as age, longitudinal size of the right atrium, mid-regional pro-atrial natriuretic peptide (MR-proANP), and highly sensitive cardiac troponin T (hsTnT) were higher than in the group of patients without HFpEF. In patients with COPD and HFpEF, statistically significant changes were found in the volume of the left atrium. In patients with SS-ILD and HFpEF, statistically significant differenceswere found in SBP before and after the 6 min walk test (6MWT), the Borg scale before 6MWT, MR-proANP, and the longitudinal dimension of the right atrium. Conclusions: The results of our study allow us to identify two different mechanisms of HFpEF development: In patients with COPD, the predominant factor in the development of HFpEF was hypoxia, while in patients with SS-ILD, myocardial dysfunction with remodeling developed against the background of secondary pulmonary hypertension, highlighting the importance of phenotype-specific evaluation. These findings suggest potential approaches for personalized risk stratification and the development of targeted management strategies for patients with HFpEF.

31 August 2025 in Medicina
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Journal Article
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LILyazat Ibrayeva
Lyazat Ibrayeva
BIBacheva Irina
Bacheva Irina
AAAssel Alina
Assel Alina
OKOlga Klassen
Olga Klassen
Background and Objectives: Chronic lung diseases act as multi-organ conditions in which systemic inflammation, vascular dysfunction, and fibrosis intersect. The pulmo-renal continuum—functional crosstalk between lungs and kidneys—remains poorly characterized. We compared year-long changes in endothelin-1 (ET-1), galectin-3 (Gal-3), renal indices (eGFR, ACR), and quantitative CT densitometry in COPD and systemic sclerosis-associated ILD (SSc-ILD). Materials and Methods: In this prospective observational study (January 2023–December 2024), 112 patients were consecutively enrolled (COPD, n = 58; SSc-ILD, n = 54). Assessments were performed at baseline and 12 months. ET-1 (ELISA) and Gal-3 (chemiluminescence) were measured in serum; eGFR was calculated by the creatinine-based CKD-EPI (2021) equation; ACR was photometric. High-resolution chest CT provided lung volume and parenchymal density (Hounsfield units) at six predefined axial levels per lung. Non-parametric statistics were applied: Wilcoxon signed-rank (within-group), Mann–Whitney U (between-group), and Spearman rank correlations for associations; results are reported with p-values (and 95% CIs). Results: Baseline eGFR was normal (COPD 90.37; SSc-ILD 92.4 mL/min/1.73 m2). eGFR declined by 6.76% in COPD (p = 0.001) and 3.16% in SSc-ILD (p = 0.029). ET-1 increased in both cohorts but more in COPD (+83.78%, p = 0.0002) than in SSc-ILD (+23.83%, p = 0.0001). Gal-3 rose significantly only in SSc-ILD (+10.2%, p = 0.043). FVC decreased in COPD (−4.01%, p = 0.01) and was unchanged in SSc-ILD. Total lung volume declined in SSc-ILD (−6.08%, p = 0.02) but not in COPD. CT density shifts were small: several slices in COPD and one slice (L6) in SSc-ILD reached statistical but not biological relevance. Conclusions: COPD exhibited larger vascular and renal biomarker shifts (ET-1 up, eGFR down, ACR up), suggesting systemic inflammation and early renal involvement. In SSc-ILD, biomarker and CT changes predominantly reflected pulmonary fibrosis progression with limited renal impact. Integrating biomarkers with quantitative CT may help delineate organ-specific trajectories along the pulmo-renal continuum; longer, larger studies are warranted. Limitations: This was a single-center cohort with a modest sample (58 COPD and 54 SSc-ILD) and a 12-month, two-time-point follow-up, which may not capture long-term trajectories and may limit it generalizability; larger multicenter studies with an extended follow-up are warranted.

1 January 2024 in Problems of Nutrition
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Journal Article
Open access
LILyazat Ibrayeva
Lyazat Ibrayeva
DRDina Rybalkina
Dina Rybalkina
AAAssel Alina
Assel Alina
BIBacheva Irina
Bacheva Irina
MAMeruyert Aubakirova
Meruyert Aubakirova
POP.V. Ovtsynov
P.V. Ovtsynov
Биоимпедансометрия у пациентов с хроническими заболеваниями легких в контексте пульмокардиоренального континуума

Verified
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LILyazat Ibrayeva
Lyazat Ibrayeva
BIBacheva Irina
Bacheva Irina
MSMalika Sadibekova
Malika Sadibekova
Background: Chronic obstructive pulmonary disease (COPD) is associated with systemic alterations in body composition, including muscle mass loss and fat redistribution, which may influence patient-reported outcomes. However, the independent contribution of bioimpedance-derived parameters, particularly phase angle, to quality of life (QoL) remains unclear. Methods: This exploratory pilot study included 75 clinically stable patients with moderate-to-severe COPD (GOLD stages II–III). Body composition was assessed using segmental multi-frequency bioelectrical impedance analysis with the InBody 770 system. Evaluated parameters included fat-free mass (FFM), skeletal muscle mass (SMM), percent body fat (PBF), visceral fat area (VFA), extracellular water-to-total body water ratio (ECW/TBW), bone mineral content (BMC), and phase angle (PhA). Quality of life was assessed using the WHOQOL-BREF questionnaire. Associations between body composition parameters and QoL domains were analyzed using Spearman correlation analysis and multivariable linear regression models. Results: Despite a median body mass index (BMI) within the normal range (23.4 kg/m2), body fat mass exceeded reference values in both men and women. Fat-free mass and skeletal muscle mass were located near the lower range of expected values. Correlation analysis demonstrated predominantly weak associations between body composition parameters and QoL domains. Significant positive correlations were identified between the psychological QoL domain and fat-free mass (ρ = 0.238, p = 0.041), skeletal muscle mass (ρ = 0.240, p = 0.040), basal metabolic rate (ρ = 0.236, p = 0.043), and bone mineral content (ρ = 0.249, p = 0.033). In multivariable regression models, fat-free mass and skeletal muscle mass demonstrated consistent positive associations with both physical and psychological QoL domains. Whole-body and segmental phase angle parameters did not demonstrate significant associations with QoL outcomes. Conclusions: In patients with COPD, BMI alone may inadequately reflect underlying alterations in body composition. Muscle-related parameters, particularly fat-free mass and skeletal muscle mass, demonstrated more consistent associations with physical and psychological aspects of quality of life than obesity-related indicators. These findings suggest that bioelectrical impedance analysis may provide additional clinically relevant information beyond BMI when assessing body composition and quality of life in patients with COPD.

31 August 2021 in Journal of Clinical Medicine of Kazakhstan
Verified
Journal Article
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DRDina Rybalkina
Dina Rybalkina
LILyazat Ibrayeva
Lyazat Ibrayeva
OGOlga Grebeneva
Olga Grebeneva
ASAlmagul Shadetova
Almagul Shadetova
LMLarissa Minbayeva
Larissa Minbayeva
AAAlexey Alekseyev
Alexey Alekseyev
Summary: The working conditions of medical staff in the offices of magnetic resonance imaging (MRI) are associated with high levels of stationary magnetic fields (SMF) and electromagnetic fields (EMF) of various frequencies and increased work intensity. It can affect cognitive, psychological and hemodynamic changes of the body with health disorders. It requires not only high professional training, but also compliance with safety measures, as well as monitoring of working conditions, health status and carrying out of medical and preventive measures.