Adaptive Physiological Changes Research Articles

Transcriptomic responses to shifts in light and nitrogen in two congeneric diatom species.

Light and nitrogen availability are basic requirements for photosynthesis. Changing in light intensity and nitrogen concentration may require adaptive physiological and life process changes in phytoplankton cells. Our previous study demonstrated that two Thalassiosira species exhibited, respectively, distinctive physiological responses to light and nitrogen stresses. Transcriptomic analyses were employed to investigate the mechanisms behind the different physiological responses observed in two diatom species of the genus Thalassiosira. The results indicate that the congeneric species are different in their cellular responses to the same shifting light and nitrogen conditions. When conditions changed to high light with low nitrate (HLLN), the large-celled T. punctigera was photodamaged. Thus, the photosynthesis pathway and carbon fixation related genes were significantly down-regulated. In contrast, the small-celled T. pseudonana sacrificed cellular processes, especially amino acid metabolisms, to overcome the photodamage. When changing to high light with high nitrate (HLHN) conditions, the additional nitrogen appeared to compensate for the photodamage in the large-celled T. punctigera, with the tricarboxylic acid cycle (TCA cycle) and carbon fixation significantly boosted. Consequently, the growth rate of T. punctigera increased, which suggest that the larger-celled species is adapted for forming post-storm algal blooms. The impact of high light stress on the small-celled T. pseudonana was not mitigated by elevated nitrate levels, and photodamage persisted.

Impact of Standing and Sitting Postures on Spinal Curvature and Muscle Mechanical Properties in Young Women: A Photogrammetric and MyotonPro Analysis.

BACKGROUND This study aimed to evaluate the effect of standing and sitting positions on spinal curvatures evaluated using projection moire and muscle tone and stiffness using the MyotonPRO hand-held device in young women. MATERIAL AND METHODS Thirty-three healthy women, aged 21 to 23 years, volunteered in the study. We used the projection moire method to examine spinal curvatures in both positions and the MyotonPRO device to measure the tone and stiffness of muscles in 3 regions. We evaluated the effects of positions (standing vs sitting), regions (cervical, thoracic, and lumbar), and side factor (right vs left) using multivariate analysis. RESULTS The sitting position significantly decreased the lumbosacral and thoracolumbar angles (P<0.001), but had no effect on the superior thoracic angle. Muscle tension and stiffness were the highest (P<0.001) in the cervical region and did not differ between positions (P>0.05) in this region. We found significantly higher muscle tone and stiffness in the thoracic and lumbar regions during sitting than during standing (P<0.001). There was symmetry in the muscle tone and the stiffness between the right and left sides of the spine. CONCLUSIONS The sitting posture decreased lumbosacral and thoracolumbar angles but increased muscle tension and stiffness in the lumbar and thoracic regions only. The symmetry of muscle tone and transverse stiffness in both positions was the normative value. This study provides insight into the adaptive physiological changes in spinal curvature and muscle mechanical properties in young women and serves as an important reference point for clinical studies of women.

A review of Ayurvedic measures for preventing COVID-19 and promoting health during pregnancy

Abstract With the fourth year of the pandemic under its belt, the SARS-CoV-2 virus (COVID-19) disease is no longer deemed a public health emergency, but rather a persistent health issue. COVID-19 is one among the many diseases caused by severe acute respiratory syndrome coronavirus-2. Two waves of COVID-19 infections have recently emerged in India, with 2.8 million confirmed cases and 1,95,123 fatalities as of April 26, 2021. Typically, individuals have symptoms such as fever, dry cough, and malaise, which usually subside within a few days. However, in rare instances, these symptoms can escalate to respiratory distress, organ failure, and ultimately death. According to the World Health Organization, pregnant women are at a higher risk of contracting COVID-19 and may experience more severe symptoms than the general population. This is owing to their adaptive physiological changes and weakened immunological condition. Additionally, there is an elevated risk of premature delivery. Susceptible populations require special attention, efforts, and care to protect them from the coronavirus. No specific drug has been discovered for pregnant women (COVID-19) to date. Thus, preventive actions are the primary focus worldwide. Considering the current COVID-19 crisis, strengthening one’s immune system is very crucial, and in recent weeks, there has been much interest in Ayush practices that boost immunity. This article describes numerous Rasayana medicines, both single and compound, as well as preventive measures. This study primarily aims to understand the Ayurvedic perspective of COVID-19 during pregnancy and to offer Ayurvedic measures for immune regulation, health promotion, and prevention. By adopting Ayurvedic measures, the immunity of pregnant women can be enhanced, and COVID-19 will be prevented well, which will lessen the burden of the disease worldwide.

Diurnal variation in genetic parameters for locomotor activity in Drosophila melanogaster assessed under natural thermal conditions.

In nature, organisms are exposed to variable and occasionally stressful environmental conditions. Responses to diurnal and seasonal fluctuations, such as temperature and food accessibility, involve adaptive behavioural and physiological changes. While much work has been done on understanding the genetic architecture and evolutionary potential of stress tolerance traits under constant thermal conditions, there has been less focus on the quantitative genetic background in variable environments. In this study, we use the Drosophila Genetic Reference Panel (DGRP) to investigate the locomotor activity, a key behavioural trait, under variable natural thermal conditions during the summer in a temperate environment. Male flies from 100 DGRP lines were exposed to natural thermal and light conditions in Drosophila activity monitors across three experimental days. We found that activity was highly temperature and time dependent and varied between lines both within and between days. Furthermore, we observed variation in genetic and environmental variance components, with low to moderate estimates of the heritability for locomotor activity, consistently peaking in the afternoons. Moreover, we showed that the estimated genetic correlations of locomotor activity between two time points decreased, as the absolute differences in ambient temperature increased. In conclusion, we find that the genetic background for locomotor activity is environment specific, and we conclude that more variable and unpredictable future temperatures will likely have a strong impact on the evolutionary trajectories of behavioural traits in ectotherms.

Single-cell sequencing reveals lung cell fate evolution initiated by smoking to explore gene predictions of correlative diseases

Continuous smoking leads to adaptive regulation and physiological changes in lung tissue and cells, and is an inductive factor for many diseases, making smokers face the risk of malignant and non-malignant diseases. The impact research is getting more and more in-depth, but the stimulant effect, mechanism of action and response mechanism of the main cells in the lungs caused by smoke components have not yet been fully elucidated, and the early diagnosis and identification of various diseases induced by smoke toxins have not yet formed a systematic relationship method. In this study, single-cell transcriptome data were generated from three lung samples of smokers and non-smokers through scRNA-seq technology, revealing the influence of smoking on lung tissue and cells and the changes in immune response. The results show that: through UMAP cell clustering, 16 intermediate cell states of 23 cell clusters of the 4 main cell types in the lung are revealed, the differences of the main cell groups between smokers and non-smokers are explained, and the human lung cells are clarified. Components and their marker genes, screen for new marker genes that can be used in the evolution of intermediate state cells, and at the same time, the analysis of lung cell subgroups reveals the changes in the intermediate state of cells under smoke stimulation, forming a subtype intermediate state cell map. Pseudo-time ordering analysis, to determine the pattern of dynamic processes experienced by cells, differential expression analysis of different branch cells, to clarify the expression rules of cells at different positions, to clarify the evolution process of the intermediate state of cells, and to clarify the response of lung tissue and cells to smoke components mechanism. The development of this study provides new diagnosis and treatment ideas for early disease detection, identification, disease prevention and treatment of patients with smoking-related diseases, and lays a theoretical foundation based on cell and molecular regulation.

Immunological indexes for assessing parameters of cardiovascular system in athletes of different qualification

Timely diagnosis and prevention of cardiovascular diseases is based on markers that detect changes in the athlete’s body at an early stage of disease. To implement this task, it is important to use novel laboratory techniques. We have carried out a comparative determination of immunological markers, specific antibodies to angiotensin, bradykinin, histamine, dopamine, serotonin and functional indicators of the cardiovascular system in athletes of various qualifications. The object of study included athletes of the Russian national teams who underwent an in-depth examination (IME) as part of medical survey. The participants were divided into groups depending on the sport arts and qualifications. Representatives of the group “Cyclic sports” included athletes without a category of 30 people and 29 qualified athletes (1st step, Candidate Master, Master of Sports, etc.). The “Combat sports” group consisted of 32 people without a category and 31 athletes with qualifications similar to those indicated above. Athletes of “Speed-strength” sports are represented by a group of 31 people without a category and 29 athletes with qualifications. The functional parameters of the cardiovascular system included analysis of heart rate, systolic blood pressure and diastolic blood pressure, which were compared with control values established for the athletes. The immunological indexes were determined in blood serum of the athletes and in subjects from control group by means of the solid-phase ELISA method using conjugated antigens of angiotensin, bradykinin, histamine, dopamine, serotonin for absorption on the plates. To compare the indexes, a control group of 30 people without cardiovascular symptoms was examined. Diastolic blood pressure for athletes of cyclic sports and combat sports was below the control values, and, for athletes of speed-strength sports, it was higher than in control group. A decrease in diastolic blood pressure for the above subgroup of athletes may indicate characteristic adaptive physiological changes in myocardium. The levels of immune-related indexes for serotonin, dopamine for the athletes of all groups corresponded to the control values. The only exception concerned qualified athletes of cyclic sports, which significantly differed from the normal values, compared to athletes without a sports category. Significantly high immunological parameters for histamine and angiotensin did not depend on the athlete’s qualification. In athletes involved in speed-strength sports, the levels of indexes for bradykinin did not differ from the normal values, and, for athletes in cyclic sports and combat sports, they significantly exceeded the norm.We have shown that different levels and types of sports activities affect the performance of cardiovascular system in their own way. The changes in immunological parameters reflect regulatory state of cardiovascular system. Accordingly, their simultaneous increase against the control may indicate participation in the development of cardiovascular diseases. The differences in their levels for athletes involved in combat sports, cyclic and speed-strength sporting activities show deeper changes in regulatory systems associated with duration and level of physical activities.

Імунозапальні зміни важкого перебігу COVID-19 у вагітних

Pregnant women are the most sensitive contingent to the effects of the virus and this is due to adaptive physiological changes in the woman’s bronchopulmonary system and features of the immune system. “Physiological tolerance” is formed during pregnancy and this is accompanied by a decrease in the level of T-helpers and natural killers in pregnant women and leads to a decrease in the resistance of the woman’s body to the action of altering viral and bacterial agents. Purpose - to reveal the peculiarities and clarify the nature of clinical and instrumental changes in pregnant women with a severe course of COVID-19 under dynamic observation. Materials and methods. The study included 40 pregnant women with coronavirus disease with a gestational age of 22 to 41 weeks, who formed the main group. The control group consisted of 40 women whose pregnancies were not complicated by coronavirus disease. The course of the disease and the influence of the coronavirus infection on the course of pregnancy were evaluated according to the results of: general - clinical examination, laboratory examination (general blood test, biochemical blood test, coagulogram, C-reactive protein, D-dimer, procalcitonin and interleukin 6), instrumental examination (cardiotocographic research, pulse oximetry). Results. Peculiarities of changes in clinical and laboratory indicators in pregnant women were studied depending on the stage of development of the coronavirus disease. During the study, it was established: a significant increase in the level of indicators in accordance with the control group, namely an increase in leukocytes by 38.2% to 10.07±1.59×109/l (р&lt;0.05), an increase in thrombocytes by 35% to 314.36±49.70 (р&lt;0.05), an increase in monocytes by 22.5% to 7.08±1.12 and a decrease in lymphocytes to 13.46±2.13, which is 51.2% lower than the indicators of the control group. The level of C-reactive protein in pregnant women with COVID-19 is probably higher than in all groups of examined patients. The level of D-dimer exceeded the indicators of the control group in patients of all groups with the maximum values of indicators in patients at the time of admission to department of anaesthesiology and intense therapy (DAIT) and was 4867.42 ng FEU/ml, which was 6.3 times higher than the level of the control group (p&lt;0.05). It should be noted that the amount of interleukin-6 in patients of all studied groups was statistically higher than that of the control group. Conclusions. Immune-inflammatory blood changes in pregnant women occur in the case of a severe course of COVID-19 and are accompanied by an increase in the level of interleukin-6 at all stages of the severe course of the disease. СRP is a marker of the severe course of the coronavirus disease in pregnant women. The identified changes are accompanied by coagulopathy and hypercoagulation with increased D-dimer content in patients with a severe course of the disease. The research was carried out in accordance with the principles of the Helsinki Declaration. The study protocol was approved by the Local Ethics Committee of all participating institutions. The informed consent of the patient was obtained for conducting the studies. No conflict of interests was declared by the authors.

Transgenic ferret models define pulmonary ionocyte diversity and function.

Speciation leads to adaptive changes in organ cellular physiology and creates challenges for studying rare cell-type functions that diverge between humans and mice. Rare cystic fibrosis transmembrane conductance regulator (CFTR)-rich pulmonary ionocytes exist throughout the cartilaginous airways of humans1,2, but limited presence and divergent biology in the proximal trachea of mice has prevented the use of traditional transgenic models to elucidate ionocyte functions in the airway. Here we describe the creation and use of conditional genetic ferret models to dissect pulmonary ionocyte biology and function by enabling ionocyte lineage tracing (FOXI1-CreERT2::ROSA-TG), ionocyte ablation (FOXI1-KO) and ionocyte-specific deletion of CFTR (FOXI1-CreERT2::CFTRL/L). By comparing these models with cystic fibrosis ferrets3,4, we demonstrate that ionocytes control airway surface liquid absorption, secretion, pH and mucus viscosity-leading to reduced airway surface liquid volume and impaired mucociliary clearance in cystic fibrosis, FOXI1-KO and FOXI1-CreERT2::CFTRL/L ferrets. These processes are regulated by CFTR-dependent ionocyte transport of Cl- and HCO3-. Single-cell transcriptomics and in vivo lineage tracing revealed three subtypes of pulmonary ionocytes and a FOXI1-lineage common rare cell progenitor for ionocytes, tuft cells and neuroendocrine cells during airway development. Thus, rare pulmonary ionocytes perform critical CFTR-dependent functions in the proximal airway that are hallmark features of cystic fibrosis airway disease. These studies provide a road map for using conditional genetics in the first non-rodent mammal to address gene function, cell biology and disease processes that have greater evolutionary conservation between humans and ferrets.

Myeloid Hif2α is not essential to maintain systemic iron homeostasis

Dietary consumption serves as the primary source of iron uptake, and erythropoiesis acts as a major regulator of systemic iron demand. In addition to intestinal iron absorption, macrophages play a crucial role in recycling iron from senescent red blood cells. The kidneys are responsible for the production of erythropoietin (Epo), which stimulates erythropoiesis, whereas the liver plays a central role in producing the iron-regulatory hormone hepcidin. The transcriptional regulator hypoxia-inducible factor (HIF)2α has a central role in the regulation of Epo, hepcidin, and intestinal iron absorption and therefore plays a crucial role in coordinating the tissue crosstalk to maintain systemic iron demands. However, the precise involvement of Hif2α in macrophages in terms of iron homeostasis remains uncertain. Our study demonstrates that deleting Hif2α in macrophages does not disrupt the expression of iron transporters or basal erythropoiesis. Mice lacking Hif2α in myeloid cells exhibited no discernible differences in hemodynamic parameters, including hemoglobin concentrations and erythrocyte count, when compared with littermate controls. This similarity was observed under conditions of both dietary iron deficiency and acute erythropoietic demand. Notably, we observed a significant increase in the expression of iron transporters in the duodenum during iron deficiency, indicating heightened iron absorption. Therefore, our findings suggest that the disruption of Hif2α in myeloid cells does not significantly impact systemic iron homeostasis under normal physiologic conditions. However, its disruption induces adaptive physiologic changes in response to elevated iron demand, potentially serving as a mechanism to sustain increased erythropoietic demand.

The proteasome regulator Rpn4 controls antifungal drug tolerance by coupling protein homeostasis with metabolic responses to drug stress.

Fungal pathogens overcome antifungal drug therapy by classic resistance mechanisms, such as increased efflux or changes to the drug target. However, even when a fungal strain is susceptible, trailing or persistent microbial growth in the presence of an antifungal drug can contribute to therapeutic failure. This trailing growth is caused by adaptive physiological changes that enable the growth of a subpopulation of fungal cells in high drug concentrations, in what is described as drug tolerance. Mechanistically, antifungal drug tolerance is incompletely understood. Here we report that the transcriptional activator Rpn4 is important for drug tolerance in the human fungal pathogen Candida albicans. Deletion of RPN4 eliminates tolerance to the commonly used antifungal drug fluconazole. We defined the mechanism and show that Rpn4 controls fluconazole tolerance via two target pathways. First, Rpn4 activates proteasome gene expression, which enables sufficient proteasome capacity to overcome fluconazole-induced proteotoxicity and the accumulation of ubiquitinated proteins targeted for degradation. Consistently, inhibition of the proteasome with MG132 eliminates fluconazole tolerance and resistance, and phenocopies the rpn4Δ/Δ mutant for loss of tolerance. Second, Rpn4 is required for wild type expression of the genes required for the synthesis of the membrane lipid ergosterol. Our data indicates that this function of Rpn4 is required for mitigating the inhibition of ergosterol biosynthesis by fluconazole. Based on our findings, we propose that Rpn4 is a central hub for fluconazole tolerance in C. albicans by coupling the regulation of protein homeostasis (proteostasis) and lipid metabolism to overcome drug-induced proteotoxicity and membrane stress.

Regulation of the regulators: Transcription factors controlling biosynthesis of plant secondary metabolites during biotic stresses and their regulation by miRNAs.

Biotic stresses threaten to destabilize global food security and cause major losses to crop yield worldwide. In response to pest and pathogen attacks, plants trigger many adaptive cellular, morphological, physiological, and metabolic changes. One of the crucial stress-induced adaptive responses is the synthesis and accumulation of plant secondary metabolites (PSMs). PSMs mitigate the adverse effects of stress by maintaining the normal physiological and metabolic functioning of the plants, thereby providing stress tolerance. This differential production of PSMs is tightly orchestrated by master regulatory elements, Transcription factors (TFs) express differentially or undergo transcriptional and translational modifications during stress conditions and influence the production of PSMs. Amongst others, microRNAs, a class of small, non-coding RNA molecules that regulate gene expression post-transcriptionally, also play a vital role in controlling the expression of many such TFs. The present review summarizes the role of stress-inducible TFs in synthesizing and accumulating secondary metabolites and also highlights how miRNAs fine-tune the differential expression of various stress-responsive transcription factors during biotic stress.

A preoptic neuronal population controls fever and appetite during sickness.

During infection, animals exhibit adaptive changes in physiology and behaviour aimed at increasing survival. Although many causes of infection exist, they trigger similar stereotyped symptoms such as fever, warmth-seeking, loss of appetite and fatigue1,2. Yet exactly how the nervous system alters body temperature and triggers sickness behaviours to coordinate responses to infection remains unknown. Here we identify a previously uncharacterized population of neurons in the ventral medial preoptic area (VMPO) of the hypothalamus that are activated after sickness induced by lipopolysaccharide (LPS) or polyinosinic:polycytidylic acid. These neurons are crucial for generating a fever response and other sickness symptoms such as warmth-seeking and loss of appetite. Single-nucleus RNA-sequencing and multiplexed error-robust fluorescence in situ hybridization uncovered the identity and distribution of LPS-activated VMPO (VMPOLPS) neurons and non-neuronal cells. Gene expression and electrophysiological measurements implicate a paracrine mechanism in which the release of immune signals by non-neuronal cells during infection activates nearby VMPOLPS neurons. Finally, we show that VMPOLPS neurons exert a broad influence on the activity of brain areas associated with behavioural and homeostatic functions and are synaptically and functionally connected to circuit nodes controlling body temperature and appetite. Together, these results uncover VMPOLPS neurons as a control hub that integrates immune signals to orchestrate multiple sickness symptoms in response to infection.

Adaptive increases in respiratory capacity and O2 affinity of subsarcolemmal mitochondria from skeletal muscle of high-altitude deer mice.

Aerobic energy demands have led to the evolution of complex mitochondrial reticula in highly oxidative muscles, but the extent to which metabolic challenges can be met with adaptive changes in physiology of specific mitochondrial fractions remains unresolved. We examined mitochondrial mechanisms supporting adaptive increases in aerobic performance in deer mice (Peromyscus maniculatus) adapted to the hypoxic environment at high altitude. High-altitude and low-altitude mice were born and raised in captivity, and exposed as adults to normoxia or hypobaric hypoxia (12kPa O2 for 6-8weeks). Subsarcolemmal and intermyofibrillar mitochondria were isolated from the gastrocnemius, and a comprehensive substrate titration protocol was used to examine mitochondrial physiology and O2 kinetics by high-resolution respirometry and fluorometry. High-altitude mice had greater yield, respiratory capacity for oxidative phosphorylation, and O2 affinity (lower P50 ) of subsarcolemmal mitochondria compared to low-altitude mice across environments, but there were no species difference in these traits in intermyofibrillar mitochondria. High-altitude mice also had greater capacities of complex II relative to complexes I + II and higher succinate dehydrogenase activities in both mitochondrial fractions. Exposure to chronic hypoxia reduced reactive oxygen species (ROS) emission in high-altitude mice but not in low-altitude mice. Our findings suggest that functional changes in subsarcolemmal mitochondria contribute to improving aerobic performance in hypoxia in high-altitude deer mice. Therefore, physiological variation in specific mitochondrial fractions can help overcome the metabolic challenges of life at high altitude.

Cardiopulmonary Exercise Testing and Cardiac Biomarker Measurements in Young Football Players: A Pilot Study.

Constant and intense physical activity causes physiological adaptive changes in the human body, but it can also become a trigger for adverse events, such as sudden cardiac arrest or sudden cardiac death. Our main objective was to assess the use of combined cardiopulmonary exercise testing (CPET) and cardiac biomarker determinants in young professional athletes. We conducted a study which involved the full examination of 19 football players, all male, aged between 18 and 20 years old. They underwent standard clinical and paraclinical evaluation, a 12-lead electrocardiogram (ECG), and transthoracic echocardiography (TTE). Afterwards, a tailored CPET was performed and peripheral venous blood samples were taken before and 3 h after the test in order to determine five biomarker levels at rest and post-effort. The measured biomarkers were cardiac troponin I (cTnI), myoglobin (Myo), the MB isoenzyme of creatine-kinase (CK-MB), the N-terminal prohormone of brain natriuretic peptide (NT-proBNP) and D-dimers. While cTnI and NT-proBNP levels were undetectable both at rest and post-effort in all subjects, the variations in Myo, CK-MB and D-dimers showed significant correlations with CPET parameters. This highlights the potential use of combined CPET and biomarker determinants to evaluate professional athletes, and encourages further research on larger study groups.

Comparative Study between Pregnant and Non-Pregnant Women Regarding Variation of Liver Function Tests: Assessment of Health Literacy

&#x0D; &#x0D; &#x0D; Context: Pregnancy is associated with normal physiological adaptive changes. Biochemical parameters reflect these changes and are distinct from the non-pregnant state. Low levels of health literacy have been shown to result in less healthy choices, riskier behavior, poorer health, less self-management, and more hospitalization among that category of adult patients. Aim: The study aimed to examine the effect of pregnancy on liver function tests among pregnant women during various trimesters of pregnancy and compare with non-pregnant and determine the patients' level of health literacy regarding the variation of liver function tests among those patients.&#x0D; Methods: A descriptive cross-sectional design was used to achieve the study aim. A random sample of 65 women was selected from an outpatient clinic in the maternity hospital; 54 out of them were pregnant women. Three tools were used to collect data, socio-demographic and clinical data assessment sheet; assessment of liver function tests by Cobas c 311; and health literacy management scale. Results: The sample's age range was between 20-40 years. This study revealed that; serum albumin levels decreased from the first trimester (3.7-4.7), and this decrease became progressively more accentuated as the pregnancy advanced (3.35-4.36 decreased significantly to 3.19-3.81). There was no significant decrease in serum AST between pregnant and non-pregnant women, but there was a significant decrease in ALT in pregnant women compared with non-pregnant women (11.90 Vs. 8.60 at p 0.017). In the current study, Serum alkaline phosphatase (ALP) was significantly higher (P˂0.0001) during the third trimester (63-171) compared with the second trimester (33-137), and the first trimester (36-129), and with the control group (48-122). Finally, it was found that a significant decrease in total serum bilirubin concentrations during the second (0.11-0.38) and third trimesters (0.12-0.42) compared to control (0.11-1.57) and the first trimester (0.12-0.85). Moreover, most of the studied sample has a low level of health literacy for all subscales and the total scores.&#x0D; Conclusion: During normal pregnancy, most values of liver function tests remain below the normal upper limits compared to non-pregnant women. Any increase in serum ALT and AST activity levels and serum bilirubin should be considered pathologic and prompt for further evaluation. Moreover, most of the studied sample has a low level of health literacy for all subscales and the total scores. The study recommended that the liver function tests should be routinely investigated during pregnancy to outline any pathologic changes. Focusing on the nurse's role, she should emphasize increasing the patient's level of health literacy regarding the variation of liver function tests. So, it is a must for nurses to develop many skills to enable them to function for this category of patients with low health literacy levels. Also, those patients should be equipped with information-seeking behavior, decision-making abilities, and problem-solving approaches along their health and illness continuum.&#x0D; &#x0D; &#x0D;

Menopause and oral health

At menopause, a woman's body undergoes radical hormonal changes, which predisposes to damage of the oral cavity. The onset of menopause is a series of morpho functional physiological adaptive changes with systemic and oral action in women. Oral health is closely related to dental hygiene, a major concern in menopause. The addressability of women to dental services tends to increase due to perimenopausal changes that occur in the gums and teeth and the oral microbiome. These changes have a hormonal substrate that significantly influences the evolution of oral health. The purpose of this review is to understand the occurrence and evolution of oro-dental complications in menopause and the systematization of therapeutic regimens. The PubMed and Web Of Science databases searched identified approximately 21 eligible articles. Periodontal damage is the most common, followed by dryness and burning sensation in the mouth. The role of hormone replacement therapy is controversial in terms of prophylaxis or the obvious therapeutic aspect of menopausal women with oral symptoms. The lack of extensive research, at least for the time being, does not establish clear therapeutic protocols to resolve these dental conditions.

Hematological Parameters, Lipid Profile, and Cardiovascular Risk Analysis Among Genotype-Controlled Indigenous Kiwcha Men and Women Living at Low and High Altitudes.

Introduction: Human adaptation to high altitude is due to characteristic adjustments at every physiological level. Differences in lipid profile and cardiovascular risk factors in altitude dwellers have been previously explored. Nevertheless, there are no reports available on genotype-controlled matches among different altitude-adapted indigenous populations.Objective: To explore the possible differences in plasma lipid profile and cardiovascular risk among autochthonous Kiwcha people inhabitants of low and high-altitude locations.Methodology: A cross-sectional analysis of plasmatic lipid profiles and cardiovascular risk factors in lowland Kiwchas from Limoncocha (230 m) and high-altitude Kiwchas from Oyacachi (3,800 m).Results: In the low altitude group, 66% were women (n = 78) and 34% (n = 40) were men, whereas in the high altitude group, 59% (n = 56) were women and 41% (n = 41%) were men. We found the proportion of overweight and obese individuals to be higher among low altitude dwellers (p < 0.05). Red blood cells (RBCs), hemoglobin concentration, and SpO2% were higher among high altitude dwellers and the erythrocyte size was found to be smaller at high altitude. The group located at low altitude also showed lower levels of plasma cholesterol, low-density lipoprotein (LDL), and high-density lipoprotein (HDL), but most of these differences are not influenced by gender or elevation.Conclusions: Living at an altitude elicits well-known adaptive physiological changes such as erythrocyte count, hemoglobin concentration, hematocrit level, and serum glucose level. We also report clinical differences in the plasma lipid profile, with higher levels of cholesterol, HDL, and LDL in inhabitants of the Andes Mountain vs. their Amazonian basin peers. Despite this, we did not find significant differences in cardiovascular risk.

Changes in vascular function and autonomic balance during the first trimester of pregnancy and its relationship with the new-born weight

This study aimed to evaluate vascular function changes and autonomic balance during the first trimester of pregnancy and its relationship with the new-born weight. This prospective study performed in pregnant (PG) women and after delivery (not pregnant: NPG) evaluated the endothelial function (EF) and arterial stiffness (AS) by a non-invasive method. We evaluated the heart rate variability (HRV), parasympathetic nervous system (PNS), sympathetic nervous system (SNS) indexes by electrocardiogram (5 min) and the urinary nitrite excretion (NOx). PG increased EF and NOx and decreased AS and HRV. PG decreased the PNS index and augmented the SNS index. The new-born weight positively correlated with the PNS index (Pearson’s r: 0.4291; p<.05), NOx, HRV and negatively correlated with AS. In summary, in pregnancy, although haemodynamically, the SNS activation plays a compensatory role, the low rates of PNS inhibition are essential to ensure normal foetal growth. Impact Statement What is already known on this subject? In pregnancy, there are adaptive physiological changes in the cardiovascular system that include increases of EF and decreases AS with an SNS activation. The study of HRV lets to predict the SNS and PNS balance and how they affect blood pressure and vascular function. What the results of this study add? Although it is known that SNS activation plays a compensatory role in healthy pregnancy, this study adds the critical role of PNS. Early in pregnancy, the low rates of PNS inhibition are essential to ensure normal foetal growth. What the implications are of these findings for clinical practice and/or further research? The present results show a potential predictive value of SNS and PNS activity early in pregnancy. It will provide valuable information not only on the pregnant woman's vascular function but also on the new-born weight.

Participation of HIF-1 in the mechanisms of neuroadaptation to acute stressful exposure

BACKGROUND: New laboratory and instrumental technologies for analyzing the adaptive capabilities of a biological organism to acute stressful effects including hypoxic ones have significantly facilitated the diagnosis and fixation of adaptive behavioral reactions, physiological and biochemical changes. Much attention has been paid to the phenomenon of preconditioning a positive effect from exposure to small doses of pathogenic factors. Hypoxia-inducible factor 1 (HIF-1) is one of the most promising markers for fixing the phenomenon of hypoxic preconditioning.&#x0D; AIM: To study the mechanisms of neuroadaptation to acute stressful effects.&#x0D; MATERIALS AND METHODS: Using models of immobilization, hypothermic exposure, and electrocutaneous irritation of rat paws were carried out for the assessment of the mechanisms of neuroadaptation. Changes in the HIF-1 concentration were recorded in the blood and in the structures of the brain.&#x0D; RESULTS: The maximum concentration of HIF-1 was found in the amygdala (230 pg / mg), in the prefrontal cortex it was 50.8 pg / mg in the control group. Hypothermal exposure increased the HIF-1 content in the amygdala by more than 4 times, while emotionally pain and immobilization showed a slight decrease in HIF-1 in the amygdala. All types of stressors significantly increased the concentration of HIF-1 in the prefrontal cortex of animals. The most pronounced changes were observed when using the model of emotional pain stress. The obtained experimental data allow us to draw with caution a conclusion about the universality and unity of multicomponent mechanisms of adaptation to acute stressful effects.

Comparative Analysis of Thermovision Images of Healthy Young Men with Different Terms of Adaptation to Conditions of the North

Introduction. The correlation between skin temperature and cutaneous blood flow is a factor that influences thermal imaging of the body in response to thermoregulation. The objective of our study was to identify features of thermal images of young male permanent residents of the Russian North belonging to different generations. Materials and methods. Thermography was carried out using a thermal imaging camera (FLIR SC620 thermal imager, Sweden), providing long-wave (7.5–13 μm) imaging with a thermal sensitivity of 0.1 °С. Quantitative analysis of thermovision images was performed for eight sites of the body captured from the front and back in a sitting position. We examined 90 young healthy men aged 17 to 21 years, permanently residing in the Magadan Region. Depending on the duration of adaptation to extreme conditions of the North, all subjects were divided into four groups: adapting migrants (“zero generation”) and those born in the North in the first, second and third generations. Results. We established a significant increase in skin temperature at all measured body sites in the series from adapting migrants (“zero generation”) to the natives in the first to third generation. The maximum differences were observed for the average temperature of the forehead, abdomen, and lower back, reaching 0.97, 1.04, and 0.98 °C, respectively. It should be noted that the young men of the city of Magadan had a higher average skin temperature than those living in optimal climatic and geographical conditions of Central Russia and Eastern Europe. The smallest difference (0.43 °С) was registered for breast temperature between the migrants and representatives of the third generation. Conclusions. Our findings prove compensatory and adaptive physiological changes occurring in the body over time to reduce adverse effects of the cold environment. This reorganization of the body is achieved through optimization of the thermoregulatory mechanism and changes in vegetative skin vasomotor responses.