Internal Homeostasis Research Articles

Abstracts

Abstracts

Developmental instability in wild Nigerian olive baboons (Papio anubis).

BackgroundDevelopmental instability in archaeological samples can be detected through analysis of skeletal and dental remains. During life, disruptions to biological internal homeostasis that occur during growth and development redirect bodily resources to returning to homeostasis and away from normal processes such as symmetrical development. Because dental enamel does not remodel in life, any deviations from normal development are left behind. Even subtle disturbances to developmental trajectory may be detected in asymmetrical development of traits, specifically a random variation in sides termed fluctuating asymmetry. Human dental fluctuating asymmetry studies are common, but here we investigate the permanent dentition of a non-human primate Papio anubis, for potential fluctuating asymmetry relative to sex, weaning, and reproductive maturity. The sample stems from an outlier population that lives in the wettest and most humid habitat of any studied baboon group.MethodsThe skulls of adult baboons were collected after their natural death in Gashaka Gumti National Park, Nigeria. The permanent dentition of antimeric teeth (paired) were measured for maximum length and breadth using standard methods. The metrics were analyzed to assess the presence of fluctuating asymmetry in adult permanent mandibular and maxillary dentition. Measurement error and other forms of asymmetry (antisymmetry, directional asymmetry) were considered and dental measures expressing true fluctuating asymmetry were used to address three research questions.ResultsMales exhibit greater fluctuating asymmetry than females, suggesting that males experience greater overall instability during the developmental period. While weaning is not more stressful than other life history stages for males and females (using the first molar fluctuating asymmetry index as a proxy compared to other teeth), it is more stressful for females than males. The onset of reproduction is also not more stressful than other life history stages for males and females (using the third molar fluctuating asymmetry index as a proxy compared to other teeth), but it is more stressful for males than females. We explore possible explanations for these findings in the discussion.

Endocrine signals fine-tune daily activity patterns in Drosophila

Animals need to balance competitive behaviors to maintain internal homeostasis. The underlying mechanisms are complex but typically involve neuroendocrine signaling. Using Drosophila, we systematically manipulated signaling between energy-mobilizing endocrine cells producing adipokinetic hormone (AKH), octopaminergic neurons, and the energy-storing fat body to assess whether this neuroendocrine axis involved in starvation-induced hyperactivity also balances activity levels under ad libitum access to food. Our results suggest that AKH signals via two divergent pathways that are mutually competitive in terms of activity and rest. AKH increases activity via the octopaminergic system during the day, while it prevents high activity levels during the night by signaling to the fat body. This regulation involves feedback signaling from octopaminergic neurons to AKH-producing cells (APCs). APCs are known to integrate a multitude of metabolic and endocrine signals. Our results add a new facet to the versatile regulatory functions of APCs by showing that their output contributes to shape the daily activity pattern under ad libitum access to food.

Extracorporeal detoxification for septic complications in children during the acute period of severe combined craniocerebral trauma

BACKGROUND: The clinical application of extracorporeal detoxification methods in patients with severe concomitant traumatic brain injury has several features and limitations due to intracranial hypertension, traumatic cerebral edema, and the risk of their growth during extracorporeal detoxification. The modern literature presents the results of using extracorporeal detoxification methods in severe concomitant trauma in children. However, practically no data are available on the possibility of their use in severe concomitant craniocerebral trauma, which determines the relevance of research in this direction.
 AIM: This study aims to improve the treatment results of affected children with severe concomitant craniocerebral trauma with the addition of septic complications using extracorporeal detoxification methods.
 MATERIALS AND METHODS: The experience using extracorporeal detoxification methods, including prolonged veno-venous hemodiafiltration combined with LPS sorption and plasma separation membrane in patient intensive care with severe concomitant craniocerebral trauma complicated by sepsis and septic shock development, is presented.
 RESULTS: The use of extracorporeal detoxification methods contributed to eliminating septic shock, stabilization of hemodynamic and internal homeostasis parameters, and regression of multiple organ failure in patients with severe concomitant traumatic brain injury. Monitoring the intracranial pressure and preventing disequilibrium syndrome development enabled avoiding an increase in intracranial hypertension in studied patients.
 CONCLUSIONS: Timely and adequate use of extracorporeal detoxification methods improves the clinical course of the acute period of traumatic illness in children with severe concomitant traumatic brain injury. The safe use of efferent therapy methods in patients with severe concomitant traumatic brain injury is ensured by invasive monitoring of intracranial pressure and preventing the development of disequilibrium syndrome.

Relationships among Macro-Minerals, Other Selected Serum Markers of Bone Profile and Milk Components of Dairy Cows During Late Lactation

Abstract Testing blood and milk parameters as well as analysing the relationships among these markers is very useful for monitoring the internal homeostasis and health in high-yielding dairy cows during various production periods. The aim of the study was to assess the correlations (relationships) among macro-minerals, such as calcium (Ca), inorganic phosphorus (P), magnesium (Mg), other selected bone profile markers, such as total protein (TP), albumin, activity of alkaline phosphatase (ALP) measured in serum and selected milk components such as number of somatic cells (SCC), colony-forming units (CFU), milk fat (MF), milk protein (MP), milk lactose (ML), solids, solids non-fat (SNF) and milk production in late-lactation cows. Both blood and milk samples were collected from 11 clinically healthy milking cows during the late-lactation period. The cows were examined once a day for 3 consecutive days resulting in 33 sets of blood and milk samples for laboratory and statistical analysis. Significant correlations were observed between: Mg and MP, Mg and SNF, ALP and SCC, TP and SCC, TP and MP, TP and SNF, albumin and MP, albumin and SNF, P and Mg, Mg and albumin, and between TP and albumin. When monitoring macro-mineral homeostasis and mammary gland health, especially in intensively fed high-yielding dairy cows correlations between these markers should be considered. The revealed correlations can allow for deeper comparative laboratory diagnostics of homeostasis and can be especially useful for laboratory monitoring of the potential risk of subclinical macro-mineral deficiency in high-yielding dairy cows.

MO239ORAL FUNGAL INFECTION IN ESRD PATIENTS

Abstract Background and Aims Chronic Kidney Disease is an increasing health alarm worldwide with systemic signs like hematologic changes, bone metabolic error, and compromised immune status presenting to a dental practitioner with oral complications. Hence a study was done to assess the oral health condition, cytological changes, and presence or absence of candida in patients with chronic renal disease undergoing dialysis aged between 30 to 65 years and controls in South India. Method A cross sectional study was conducted among 80 adults with CKD and controls, attending KMC and MCODS, Mangalore. Oral manifestations and oral hygiene were assessed; Cytological smears were taken for morphometric analysis of buccal mucosal cells from the subjects. Oral smears were cultured to check for the growth of fungal species in subjects and controls. Statistical analysis was done using SPSS Version 13. Chi square test was used to compare categorical variables between the groups. Results There was a significant difference in oral hygiene status and cytological changes in patients with CKD. Oral Fungal Infection was found in 32% of our patients on dialysis and oral lesions, defined as clinical signs associated with OFI such as erythematous oral stomatitis, membranous candidiasis, or angular cheilitis, were found in 37% of the patients with OFI, while 5% of the patients without findings of fungal infection presented oral lesions associated with OFI (p=0.0002). Furthermore, patients with self-reported mouth dryness were three times more likely (p=0.02) to be diagnosed with OFI. Conclusion Hemodialysis patients are found to have significantly more OFI than controls. Oral dryness and dental plaque formation also seem to be at risk of developing OFI. Detection of oral lesions associated with OFI should be combined with a histopathological diagnosis before antifungal treatment. The prevalence of oral candida in these cases is alarming and can be a predictor of a poor prognostic index. As medicine advances, oral health care professionals should have a holistic approach to the management of patients with complex medical problems especially to diseases of the renal system as it is pivotal in maintaining a stable internal environment and homeostasis.

Disruption of redox homeostasis with synchronized activation of apoptosis highlights the antifilarial efficacy of novel piperine derivatives: An in vitro mechanistic approach

A series of novel piperine derivatives were synthesized with high yield and were evaluated for its antifilarial potential against the bovine filarial parasite Setaria cervi. Among 21 (3a-3u) compounds screened, three of them (3k, 3l, 3s) showed significant potential against all the developmental stages (oocytes, microfilariae and adult) of the filarial worm in time and dose dependent manner. 3l showed the highest efficacy among the selected three compounds. These three compounds were further evaluated for both in vitro and in vivo toxicity analyses which further fortified the benign nature of the selected compounds. The antifilarial activities they exhibited were clearly fuelled through disparity of the internal redox homeostasis as evidenced from the alterations in the enzymatic and non-enzymatic antioxidants level which ultimately shifted towards activation of pro-apoptotic signaling cascade eventually leading to the death of the parasites. The ability of the compound 3l to bind thioredoxin reductase and CED-3 protein are the key findings of this study. The present study supported with several biological experiments is therefore a maiden report on the antifilarial effectiveness of these novel piperine derivatives.

A combined application of extracorporal detoxification techniques in children at the acute stage of severe concomitant traumtic brain injury

Introduction. In modern literature, there is a limited information on the techniques of extracorporeal detoxification in children with severe concomitant injuries. Moreover, in fact there are no data on their application in children with severe concomitant traumatic brain injuries. It has defined the relevance of this research.Purpose. To improve outcomes of treatment in children with severe concomitant traumatic brain injuries who have manifestations of toxic-resorptive syndrome (TRS), septic complications, acute renal failure of mixed genesis using a combined application of extracorporeal detoxification techniques.Material and methods. The article describes authors’ experience in a combined application of extracorporeal detoxification techniques, including continuous veno-venous hemodiafiltration (CVVHDF) and membrane plasma separation (MPS) in ICU patients with severe concomitant traumatic brain injuries complicated by toxic-resorptive syndrome, sepsis and septic shock.Results. The combined application of extracorporeal detoxification techniques promoted the regression of toxic-resorptive syndrome, shock reversal, stabilization of hemodynamic parameters, parameters of internal homeostasis as well as the regression of multiple organ failure.Conclusion. Early extracorporeal detoxification improves clinical course at the acute stage of trauma. The authors underline that the key requirement for safety in extracorporeal detoxification in patients with severe concomitant traumatic brain injury is the invasive monitoring of intracranial pressure.

Displaying the autonomic processing network in humans – a global tractography approach

Regulation of the internal homeostasis is modulated by the central autonomic system. So far, the view of this system is determined by animal and human research focusing on cortical and subcortical grey substance regions. To provide an overview based on white matter architecture, we used a global tractography approach to reconstruct a network of tracts interconnecting brain regions that are known to be involved in autonomic processing. Diffusion weighted imaging data were obtained from subjects of the human connectome project (HCP) database. Resulting tracts are in good agreement with previous studies assuming a division of the central autonomic system into a cortical (CAN) and a subcortical network (SAN): the CAN consist of three subsystems that encompass all cerebral lobes and overlap within the insular cortex: a parieto-anterior-temporal pathway (PATP), an occipito-posterior-temporo-frontal pathway (OPTFP) and a limbic pathway. The SAN on the other hand connects the hypothalamus to the periaqueductal grey and locus coeruleus, before it branches into a dorsal and a lateral part that target autonomic nuclei in the rostral medulla oblongata. Our approach furthermore reveals how the CAN and SAN are interconnected: the hypothalamus can be considered as the interface-structure of the SAN, whereas the insula is the central hub of the CAN. The hypothalamus receives input from prefrontal cortical fields but is also connected to the ventral apex of the insular cortex. Thus, a holistic view of the central autonomic system could be created that may promote the understanding of autonomic signaling under physiological and pathophysiological conditions.

COVID-19-induced endotheliitis: emerging evidence and possible therapeutic strategies.

The coronavirus disease 2019 (COVID‐19) pandemic, a viral illness caused by the severe acute respiratory syndrome coronavirus‐2 (SARS‐CoV‐2), 1 has produced at the time of this writing nearly 33 million cases of infection, with over a million deaths in 235 countries, 2 causing an unprecedented burden on healthcare systems and a severe global socioeconomic crisis. As the pandemic spreads, knowledge on the disease course, as well as potential risk factors and predictors of severity is increasing daily, and initial data from randomised controlled studies have allowed care providers to refine therapeutic strategies. Nonetheless, mortality is markedly elevated among those presenting with severe disease, long‐term sequelae among survivors are unknown, and vaccine‐based therapies currently remain at early stages of development. Most reported cases are asymptomatic or present with mild symptoms; however, 7–26% of hospitalised patients experience severe disease, often requiring admission to intensive care units (ICUs), with progressive multiple organ dysfunction and high mortality. 3 , 4 , 5 Such differences in clinical outcomes have led physicians to initiate diverse pharmacological therapies at various stages of the disease, generating challenges as to the most appropriate therapeutic choice for COVID‐19. In this context, the use of dexamethasone has significantly reduced mortality rates in critically ill patients requiring supplemental oxygen or mechanical ventilation, 6 and remdesivir has demonstrated clinical benefit in hospitalised patients, but with unknown survival benefit to date 7 ; additional effective treatment options are therefore urgently needed. In an initial attempt to provide a uniform and widely reproducible methodology to guide systematic treatment strategies, a three‐stage classification of COVID‐19 has been proposed. 8 The Stage I or ‘early infection’ occurs at the initial establishment of disease with high viral replication, and commonly presents with a range of complaints that can include mild and often non‐specific influenza‐like signs and symptoms. Stage II is the ‘pulmonary phase’, with preferential viral‐mediated injury of the lung parenchyma and this is characterised by shortness of breath, hypoxia and pulmonary infiltrates with some degree of lung inflammation. Stage III is characterised by an exaggerated host immune‐inflammatory response to the virus, leading to acute respiratory distress syndrome (ARDS) and multi‐organ failure (MOF).

Immunology and Pathology in Ocular Drug Development.

Clear vision is dependent on features that protect the anatomical integrity of the eye (cornea and sclera) and those that contribute to internal ocular homeostasis by conferring hemangiogenic (avascular tissues and antiangiogenic factors), lymphangiogenic (lack of draining lymphatics), and immunologic (tight junctions that form blood-ocular barriers, immunosuppressive cells, and modulators) privileges. The later examples are necessary components that enable the eye to maintain an immunosuppressive environment that responds to foreign invaders in a deviated manner, minimizing destructive inflammation that would impair vision. These conditions allowed for the observations made by Medawar, in 1948, of delayed rejection of allogenic tissue grafts in the anterior chamber of mouse eye and permit the sequestration of foreign invaders (eg, Toxoplasma gondii) within the retina of healthy individuals. Yet successful development of intraocular drugs (biologics and delivery devices) has been stymied by adverse ocular pathology, much of which is driven by immune pathways. The eye can be intolerant of foreign protein irrespective of delivery route, and endogenous ocular cells have remarkable plasticity when recruited to preserve visual function. This article provides a review of current understanding of ocular immunology and the potential role of immune mechanisms in pathology observed with intraocular drug delivery.

Human Adaptations to Multiday Saturation on NASA NEEMO.

Human adaptation to extreme environments has been explored for over a century to understand human psychology, integrated physiology, comparative pathologies, and exploratory potential. It has been demonstrated that these environments can provide multiple external stimuli and stressors, which are sufficient to disrupt internal homeostasis and induce adaptation processes. Multiday hyperbaric and/or saturated (HBS) environments represent the most understudied of environmental extremes due to inherent experimental, analytical, technical, temporal, and safety limitations. National Aeronautic Space Agency (NASA) Extreme Environment Mission Operation (NEEMO) is a space-flight analog mission conducted within Florida International University’s Aquarius Undersea Research Laboratory (AURL), the only existing operational and habitable undersea saturated environment. To investigate human objective and subjective adaptations to multiday HBS, we evaluated aquanauts living at saturation for 9–10 days via NASA NEEMO 22 and 23, across psychologic, cardiac, respiratory, autonomic, thermic, hemodynamic, sleep, and body composition parameters. We found that aquanauts exposed to saturation over 9–10 days experienced intrapersonal physical and mental burden, sustained good mood and work satisfaction, decreased heart and respiratory rates, increased parasympathetic and reduced sympathetic modulation, lower cerebral blood flow velocity, intact cerebral autoregulation and maintenance of baroreflex functionality, as well as losses in systemic bodyweight and adipose tissue. Together, these findings illustrate novel insights into human adaptation across multiple body systems in response to multiday hyperbaric saturation.

Stress Medicine and Human Health

Stress is an nonspecific adaptive response to endogenous or exogenous stimuli, which is commonly applied by organisms to maintain their internal homeostasis and normal physiological functions. When the extent of stress response surpasses the threshold that the organism can adjust to, a variety of physiological or psychological diseases can be induced by stress response. Stress medicine focuses on investigating the mechanisms underlying the development and progression of the diseases induced by stress response, aiming to find ways to prevent and treat stress-related diseases. Here, we will start with an introduction of stress response, then review the recent advances of stress medicine by discussing the latest research advances in the regulatory mechanisms and biological functions of stress response under various physiological or pathological conditions.

Multi-segment lymphatic vessel model based on lattice Boltzmann method

The lymphatic system plays an important part in the body’s immunity and cell’s internal environment homeostasis. Like a blood circulatory system, the lymphatic system is a piping system throughout the body, which is composed mainly of lymphatic fluid and lymphatic vessels. The spontaneous contraction of the lymphatic vessels drives the flow of lymphatic fluid in the vessels. The spontaneous contraction-relaxation mechanism of lymphatic vessels is determined by the oscillating feedback of Ca<sup>2+</sup> concentration and NO concentration. The distribution of NO in the vessels plays an important role in the contraction cycle of lymphatic vessels. The shear force acting on the lymphatic valves due to the flow of fluid is the main source of NO. In a real system, the distribution of NO in a certain section of lymphatic vessel will be affected by other lymphanion connected to it, especially the upstream connecting fragments. Through the lattice Boltzmann method, a multi-segment lymphatic vessel model with valve structure is established, which reproduces the feedback mechanism of Ca<sup>2+</sup> and NO, valve change and fluid flow. There are three types of lymphatic vessels in the model, namely the initial lymphatic vessel, the collecting lymphatic vessel, and the outlet lymphatic vessel. The number of lymphatic vessels can be unlimited and inputted by the parameters. The number of lymphatic vessels is 3－5, and there are two pairs of valves in each lymphatic vessel. In this paper studied are the distribution of NO and pressure in multi-segment lymphatic vessel, and the change in the flow of each vessel in the three-segment vessel model over time.

Optimum health and inhibition of cancer progression by microbiome and resveratrol

Resveratrol (RES) is a naturally occurring polyphenol found in fruits, green leafy vegetables, and peanuts. This versatile compound, which has potent regenerative, anti-oxidative, and cancer-fighting properties, is produced in plants, particularly in response to stress stimuli. By various mechanisms, including regulation of genes and proteins, RES inhibits the growth of pathogenic bacteria and the development of cancers. The gut has a prominent role in nutrient assimilation, metabolism, immunity, and cancer regression, and the endogenous microbiome protects the host from invasive bacteria that facilitate the progression of various diseases. Short-chain fatty acids (SFCAs) are the byproducts of microbial fermentation in the gastrointestinal tract. Native microflora regulates internal homeostasis, influence the activity of host immune cells, and regress some cancers via the action of SCFAs produced from a plant-based diet. This review shows the relevance of dietary constituents and gut microbial activity in ensuring optimal health of the host.

Environnement microbiologique, confinement et risque allergique

Incidence of allergies increases year after year in industrialized countries and is higher as compared to poor resource countries. This raise is in fact better related to the level of hygiene in these countries and the lack of proximity to nature, soil or animals although more causes are possible. So, we are facing the paradox that living in better conditions is not so good for health! The adaptive immunity (ASI), which major goal is to protect, in long-term, the body, needs to mature progressively and stay fit all life, in terms of extend of recognition (repertoire), discernment between pathogens and saprophytes, tolerance and adaptation of the response type (Th1/Th2). This mainly happen during the first years of life but keep going all along life duration. Microbiota, specially the one from the gut, is extremely diversified. It plays a major intermediary role in between environment and ASI, directly depending on the exposure to aerosols and food intake and keeping close cross-talk with the ASI, specially across the mucosae. Both microbiota and ASI are self-organized according to external constrains and internal homeostasis rules. They both cross-stimulate and regulate each other. Allergy, as an abnormal reaction of the ASI, appears to be related to dysbiosis, specially in an “overclean” environment. But causal relationship is not easy to prove specially because we are facing highly complex systems and numerous confounding parameters. Multiple studies have approached this question but conditions and methods vary and results are not univoqual. Also, it is difficult to conduct clinical studies on volunteers under drastic restrictions for a long time. However, rare opportunities exist. As an example, volunteers go in mission in the Franco-Italian station in South Pole, named Concordia. They face a complete confinement for 10 months, in extreme conditions with very low antigenic burden. The European Space Agency follows their physical and mental health with high interest in view of long space flight risks. Paul Emile Victor institute in Brest (France) manage the logistic and maintenance. A European consortium ICELAND conducts an immune survey of the teams specially regarding immune repertoire and microbiota changes.

Post-eclosion temperature effects on insect cuticular hydrocarbon profiles.

The insect cuticle is the interface between internal homeostasis and the often harsh external environment. Cuticular hydrocarbons (CHCs) are key constituents of this hard cuticle and are associated with a variety of functions including stress response and communication. CHC production and deposition on the insect cuticle vary among natural populations and are affected by developmental temperature; however, little is known about CHC plasticity in response to the environment experienced following eclosion, during which time the insect cuticle undergoes several crucial changes. We targeted this crucial to important phase and studied post‐eclosion temperature effects on CHC profiles in two natural populations of Drosophila melanogaster. A forty‐eight hour post‐eclosion exposure to three different temperatures (18, 25, and 30°C) significantly affected CHCs in both ancestral African and more recently derived North American populations of D. melanogaster. A clear shift from shorter to longer CHCs chain length was observed with increasing temperature, and the effects of post‐eclosion temperature varied across populations and between sexes. The quantitative differences in CHCs were associated with variation in desiccation tolerance among populations. Surprisingly, we did not detect any significant differences in water loss rate between African and North American populations. Overall, our results demonstrate strong genetic and plasticity effects in CHC profiles in response to environmental temperatures experienced at the adult stage as well as associations with desiccation tolerance, which is crucial in understanding holometabolan responses to stress.

Simplicity from Complexity – MicroRNAs and the Maintenance of Skin Homeostasis

Skin homeostasis is indispensable for terrestrial life. The skin, sitting at the interface between the dry external environment and the aqueous interior, acts as a barrier to delimit each from the other. Maintaining this barrier function is critical – if it is compromised, pathogen ingress and water loss may have potentially severe consequences. Skin function is supported by an intricate regulatory network incorporating both protein-coding genes as well as non-coding RNA transcripts. This review will focus on microRNAs, a subset of non-coding RNAs which target specific messenger RNAs for post-transcriptional repression. MicroRNAs regulate every aspect of skin biology, from initial cell fate determination during embryogenesis, to steady state keratinocyte maturation and barrier renewal, as well as coordination of the healing process in response to skin damage. An increased appreciation for the role of microRNAs in skin pathologies not only sheds light on the importance of these small RNAs in healthy skin function, but also provides an expanding repertoire of potential therapeutic targets through which these conditions may be addressed. Mammalian skin appears simple. Its core function is to shield the body from the external environment. Water must be retained to sustain life, whilst harmful pathogens and other environmental insults must be kept out. This simplicity in function belies the array of intricate processes necessary to maintain the skin’s barrier function – multiple series of highly-ordered molecular and cellular events control constant epidermal rejuvenation, as well as rapid repair of any epithelial damage sustained. For internal homeostasis to be maintained, epithelial integrity is essential, and contingent upon precise spatiotemporal control of protein expression in the skin.

Evaluation of hearing acuity in patients with chronic renal failure by pure tone audiometry

<p class="abstract"><strong>Background:</strong> Hearing loss is common in patients with chronic renal failure. It is well known that chronic renal failure (CRF) causes different systemic and otorhinolaryngologic manifestations due to the accumulation of nitrogenous waste products. The aim of the study was to evaluate hearing threshold and the severity of hearing loss at different frequencies in patients of chronic renal failure (CRF), and to analyse the role of duration of disease on hearing threshold in patients of CRF.</p><p class="abstract"><strong>Methods:</strong> Fifty two patients of CRF were included in the study. Pure tone audiometry was done in all cases.</p><p class="abstract"><strong>Results:</strong> Majority of the patients were in 21 to 40 year age group (mean: out of 52 patients, 38 patients (73.07%) had sensorineural hearing loss and 14 patients (26.93%) had normal hearing. Majority of the patients with hearing loss had mild (44.73%) or moderate (42.11%) sensorineural hearing loss. On comparison of the mean hearing threshold Group II (duration of disease more than five years- 17 patients) showed a statistically significant difference (P<0.05) in mean hearing threshold at 250 Hz.</p><p class="abstract"><strong>Conclusions:</strong> Hearing loss is present in majority of the patients of CRF. Most of the cases have mild to moderate sensorineural hearing loss. High frequency hearing loss in chronic renal failure is related to the duration of the disease, duration of haemodialysis’ and internal homeostasis, namely hyponatremia.</p>

THE BIOLOGICAL ROLE OF MICRONUTRIENTS (MINERALS) IN FORMING HUMAN HEALTH: DERMATOLOGICAL ASPECTS. PART II

The article presents facts that reflect the importance of minerals, which are indispensable components of food, necessary for a full metabolism, growth and development, to reduce the risk of morbidity, to ensure all vital functions, including reproduction of the genome, as well as protection from negative environmental influences, in particular for residents of the Far North and equivalent territories, taking part in adaptation mechanisms. The main adaptive capabilities of a person and the ability to maintain high functional reserves of the body are a consequence of the constancy of the content and intake of vitamins and chemical elements in the body. In the human body, 81 of the 92 chemical elements found in nature are found. Dermatological aspects were noted, reflecting the debut of skin signs (including changes in the appendages: hair and nails) in case of violations of the mineral imbalance in the body, since the skin, as a separate organ, provides the interaction of the entire human body with the environment, being a kind of barrier, while maintaining internal homeostasis. Ways to correct the imbalance of minerals are given.