Family environment interacts with CRHR1 rs17689918 to predict mental health and behavioral outcomes
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30.08.2018 |
Roy A.
Laas K.
Kurrikoff T.
Reif A.
Veidebaum T.
Lesch K.
Harro J.
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Progress in Neuro-Psychopharmacology and Biological Psychiatry |
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3 |
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© 2018 Elsevier Inc. Background: Corticotrophin-releasing hormone receptor-1 gene (CRHR1) variants have been implicated in mental health. However, little is known of the effects of CRHR1 on long-term mental health and behavior in presence of environmental stressors. We assess the effects of CRHR1 variant (rs17689918)-by-environment interactions on emotionality and behavioral traits, including anxiety, depression, aggression and antisocial behaviors. We also determine effects of rs17689918-by-environment-by-sex interactions on the above-mentioned outcomes. Methods: Genotypic assessments were carried out in 564 children (mean age 10 years, 52.5% females) from the ongoing longitudinal Estonian Children Personality Behaviour and Health Study (ECPBHS). Information on stressful life events and family relationships were available at baseline and information on behavioral and mental health outcomes (self- and parent-reports) were available at follow-up ages of 18 and 25 years. ANOVAs were used to determine associations of two-way CRHR1-by-environment and three-way CRHR1-by-sex-by-environment interactions on behavioral and mental health outcomes. Results: Two-way CRHR1 interaction effects showed associations between low familial warmth and hostility in individuals with the GG genotype. Associations of low familial warmth with aggression, of higher number of stressful life events with aggression, and of stressful live events with anxious-depressive symptoms were noted in male A-allele carriers and female GG homozygotes. Conclusion: CRHR1-by-familial environment interactions influence both outwardly-directed aggression as well as mood and anxiety disorder symptoms in a sex-specific manner. The type of environmental stressor can also influence effects of CRHR1 on behavioral and mental health outcomes.
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Mechanisms of LPS-induced acute kidney injury in neonatal and adult rats
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08.08.2018 |
Plotnikov E.
Brezgunova A.
Pevzner I.
Zorova L.
Manskikh V.
Popkov V.
Silachev D.
Zorov D.
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Antioxidants |
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5 |
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© 2018 by the authors. Licensee MDPI, Basel, Switzerland. Neonatal sepsis is one of the major causes of mortality and morbidity in newborns, greatly associated with severe acute kidney injury (AKI) and failure. Handling of newborns with kidney damage can be significantly different compared to adults, and it is necessary to consider the individuality of an organism’s response to systemic inflammation. In this study, we used lipopolysaccharide (LPS)-mediated acute kidney injury model to study mechanisms of kidney cells damage in neonatal and adult rats. We found LPS-associated oxidative stress was more severe in adults compared to neonates, as judged by levels of carbonylated proteins and products of lipids peroxidation. In both models, LPS-mediated septic simulation caused apoptosis of kidney cells, albeit to a different degree. Elevated levels of proliferating cell nuclear antigen (PCNA) in the kidney dropped after LPS administration in neonates but increased in adults. Renal fibrosis, as estimated by smooth muscle actin levels, was significantly higher in adult kidneys, whereas these changes were less profound in LPS-treated neonatal kidneys. We concluded that in LPS-mediated AKI model, renal cells of neonatal rats were more tolerant to oxidative stress and suffered less from long-term pathological consequences, such as fibrosis. In addition, we assume that by some features LPS administration simulates the conditions of accelerated aging.
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Neuroprotective effects of mitochondria-targeted plastoquinone in a rat model of neonatal hypoxic–ischemic brain injury
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01.08.2018 |
Silachev D.
Plotnikov E.
Pevzner I.
Zorova L.
Balakireva A.
Gulyaev M.
Pirogov Y.
Skulachev V.
Zorov D.
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Molecules |
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6 |
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© 2018 by the authors. Neonatal hypoxia–ischemia is one of the main causes of mortality and disability of newborns. To study the mechanisms of neonatal brain cell damage, we used a model of neonatal hypoxia–ischemia in seven-day-old rats, by annealing of the common carotid artery with subsequent hypoxia of 8% oxygen. We demonstrate that neonatal hypoxia–ischemia causes mitochondrial dysfunction associated with high production of reactive oxygen species, which leads to oxidative stress. Targeted delivery of antioxidants to the mitochondria can be an effective therapeutic approach to treat the deleterious effects of brain hypoxia–ischemia. We explored the neuroprotective properties of the mitochondria-targeted antioxidant SkQR1, which is the conjugate of a plant plastoquinone and a penetrating cation, rhodamine 19. Being introduced before or immediately after hypoxia–ischemia, SkQR1 affords neuroprotection as judged by the diminished brain damage and recovery of long-term neurological functions. Using vital sections of the brain, SkQR1 has been shown to reduce the development of oxidative stress. Thus, the mitochondrial-targeted antioxidant derived from plant plastoquinone can effectively protect the brain of newborns both in pre-ischemic and post-stroke conditions, making it a promising candidate for further clinical studies.
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Vitamin B complex mitigates cardiac dysfunction in high-methionine diet-induced hyperhomocysteinemia
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01.07.2018 |
Jeremic J.
Nikolic Turnic T.
Zivkovic V.
Jeremic N.
Milosavljevic I.
Srejovic I.
Obrenovic R.
Jancic S.
Rakocevic M.
Matic S.
Djuric D.
Jakovljevic V.
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Clinical and Experimental Pharmacology and Physiology |
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3 |
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© 2018 John Wiley & Sons Australia, Ltd This research is designed to test the hypothesis that elevated homocysteine (Hcy) levels in vivo, caused by a deficit in vitamin B complex, promote changes in cardiac function and redox status that lead to heart failure. In order to conduct the study, we used adult male Wistar albino rats (n = 30; 4 weeks old; 100 ± 15 g body weight). Hyperhomocysteinaemia (HHcy) in these animals was achieved by dietary manipulation. For 4 weeks, the animals were fed with a standard rodent chow (control, CF), a diet enriched in methionine with no deficiency in B vitamins (i.e., folic acid, B6 and B12) (HMNV) or a diet enriched in methionine and deficient in B vitamins (HMLV). After 28 days of dietary manipulation, all animals were killed. The rat hearts were isolated and retrogradely perfused according to the Langendorff technique at a gradually increasing perfusion pressure. We found a negative correlation between elevated serum Hcy and total body and heart weight. The maximum rate of left ventricular pressure development was significantly increased in the HMNV group compared with in the other groups. Systolic left ventricular pressure was significantly changed in all groups. HHcy induces remodelling of the cardiac tissues, as moderate HHcy is associated with more prominent interstitial and perivascular fibrosis. Our results suggest that a high methionine diet without vitamin B complex causes profound negative effects associated with HHcy.
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Comparative Study of the Severity of Renal Damage in Newborn and Adult Rats under Conditions of Ischemia/Reperfusion and Endotoxin Administration
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01.06.2018 |
Pevzner I.
Pavlenko T.
Popkov V.
Andrianova N.
Zorova L.
Brezgunova A.
Zorov S.
Yankauskas S.
Silachev D.
Zorov D.
Plotnikov E.
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Bulletin of Experimental Biology and Medicine |
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0 |
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© 2018, Springer Science+Business Media, LLC, part of Springer Nature. Oxidative kidney injury was compared in newborn and adult rats under conditions of ischemia/reperfusion and in experimental model of systemic inflammation induced by endotoxin (LPS of bacterial cell wall) administration. Oxidative stress in the kidney accompanied both experimental models, but despite similar oxidative tissue damage, kidney dysfunction in neonates was less pronounced than in adult animals. It was found that neonatal kidney has a more potent regenerative potential with higher level of cell proliferation than adult kidney, where the level proliferating cell antigen (PCNA) increased only on day 2 after ischemia/reperfusion. The pathological process in the neonatal kidney developed against the background of active cell proliferation, and, as a result, proliferating cells could almost immediately replace the damaged structures. In the adult kidney, regeneration of the renal tissue was activated only after significant loss of functional nephrons and impairment of renal function.
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The psychosocial burden of hand eczema: Data from a European dermatological multicentre study
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01.06.2018 |
Marron S.
Tomas-Aragones L.
Navarro-Lopez J.
Gieler U.
Kupfer J.
Dalgard F.
Lien L.
Finlay A.
Poot F.
Linder D.
Szepietowski J.
Misery L.
Jemec G.
Romanov D.
Sampogna F.
Szabo C.
Altunay I.
Spillekom-van Koulil S.
Balieva F.
Ali F.
Halvorsen J.
Marijuan P.
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Contact Dermatitis |
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2 |
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© 2018 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd Background: The essential physical role, visibility and social importance of the hands place a major psychological burden on patients with hand eczema. Objectives: The aim of this study was to identify the psychological, social and clinical characteristics of patients with hand eczema, in particular the prevalences of depression, anxiety, suicidal ideation, and comorbidities. Materials and methods: Data on patients with hand eczema were analysed from a large European multicentre study conducted with dermatology outpatients from 13 countries. Groups of patients and controls were compared to analyse the psychological burden of hand eczema. Results: Female patients with hand eczema had higher Hospital Anxiety and Depression Scale (HADS) scores for anxiety (n = 86, median = 7.0) than controls (n = 900, median = 5.0, P =.02), and for depression (median = 4.0) than controls (3.0, P <.001). Patients with high suicidal ideation, with low socioeconomic status and who were widowed or divorced were more likely to fulfil the HADS criteria for anxiety [odds ratio (OR) > 1, P =.038, P <.001, and P <.001, respectively]. The median Dermatology Life Quality Index score was 7.0 (n = 68). Discussion: This study identifies a specific psychological burden experienced by hand eczema patients, highlighting the need for focused psychosocial interventions. Physicians in particular should be aware of the need to identify anxiety and depression in female patients.
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The role of adrenal glands in the mechanisms of stress effects on pathogenesis of complications in acute small bowel obstruction (review)
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01.05.2018 |
Milyukov V.
Bogdanov A.
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Novosti Khirurgii |
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0 |
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© 2018 Vitebsk State Medical University. All rights reserved. The aim of this review is a detailed description of the alleged mechanisms of involving the adrenal glands, as a key element of the system of nonspecific protection of an organism and adaptation to stress, in the pathogenesis of clinical manifestations of acute small bowel obstruction and developing complications, including peritonitis, sepsis and multiple organ failure. In the discussion of the pathogenesis of clinical manifestations of acute small bowel obstruction and its complications, leading to the disappointing results of treatment of patients on a large sample of contemporary scientific publications, it is noted that many researchers see a close connection between the influence of various stress effects on humans and the functioning of internal organs and systems. It is demonstrated that in the literature there is growing evidence of the negative effects of stress and related affective disorders on the course of inflammatory bowel diseases and gastrointestinal tract, which is one of the targets of stress, and hormones of the hypothalamicpituitary- adrenal system, especially the adrenal glands take an active part in the mediation of these reactions. The conducted analysis of the current literature demonstrates a large number of unsolved issues in this direction, that proves the need for a comprehensive experimental and morphological studies to clarify and detail all pathogenetic links of dependent morpho-functional transformations in the dynamics of development of acute small bowel obstruction which may lead to adrenal insufficiency and disruption of adaptation mechanisms that maintain the stability of homeostasis.
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Estradiol decreases blood pressure in association with redox regulation in preeclampsia
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03.04.2018 |
Babic G.
Markovic S.
Varjacic M.
Djordjevic N.
Nikolic T.
Stojic I.
Jakovljevic V.
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Clinical and Experimental Hypertension |
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0 |
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© 2017 Taylor & Francis. In this study, we tested a hypothesis that a short-term estradiol therapy may reduce blood pressure in preeclampsia by modulating plasma oxidative stress. The intramuscular injections of 10 mg 17-beta-estradiol were prescribed to preeclamptic pregnant women during the 3-day therapy before a labor induction. The analyses of mean arterial pressure (MAP), serum estradiol concentrations, plasma superoxide anion (O2.), hydrogen peroxide (H2O2), nitrites (NO2−), and peroxynitrite (ONOO−) were conducted before and during the therapy. We found that the plasma concentrations of oxidative stress markers, such as O2– and H2O2, are higher in preeclampsia and positively correlated with the MAP value. Moreover, it was shown that the plasma concentration of NO2– as an indicator of NO levels is higher in preeclampsia. A short-term intramuscular application of estradiol decreases the MAP value and the plasma concentration of O.–, H2O2, NO2−, and ONOO– in preeclampsia. A positive correlation between the decrease of MAP values and the decrease of plasma concentrations of O2–, H2O2, and ONOO– was found in preeclampsia during a short-term estradiol therapy. We conclude that the short-term estradiol therapy decreases the MAP value in preeclampsia by modulating the plasma oxidative stress. We speculate that the estradiol metabolism in preeclampsia is an important mechanism that contributes to vascular dysfunction.
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Cell therapy for stress urinary incontinence: Present-day frontiers
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01.02.2018 |
Vinarov A.
Atala A.
Yoo J.
Slusarenco R.
Zhumataev M.
Zhito A.
Butnaru D.
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Journal of Tissue Engineering and Regenerative Medicine |
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6 |
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Copyright © 2017 John Wiley & Sons, Ltd. Stress urinary incontinence (SUI) significantly diminishes the quality of patients' lives. Currently available surgical and nonsurgical therapies remain far from ideal. At present, advances in cellular technologies have stirred growing interest in the use of autologous cell treatments aimed to regain urinary control. The objective was to conduct a review of the literature and analyse preclinical and clinical studies dedicated to various cell therapies for SUI, assessing their effectiveness, safety, and future prospects. A systematic literature search in PubMed was conducted using the following key terms: “stem,” “cell,” “stress,” “urinary,” and “incontinence.” A total of 32 preclinical studies and 15 clinical studies published between 1946 and December 2014 were included in the review. Most preclinical trials have used muscle-derived stem cells and adipose-derived stem cells. However, at present, the application of other types of cells, such as human amniotic fluid stem muscle-derived progenitor cells and bone marrow mesenchymal stromal cells, is becoming more extensive. While the evidence shows that these therapies are effective and safe, further work is required to standardize surgical techniques, as well as to identify indications for their use, doses and number of doses. Future research will have to focus on clinical applications of cell therapies; namely, it will have to determine indications for their use, doses of cells, optimal surgical techniques and methods, attractive cell sources, as well as to develop clinically relevant animal models and make inroads into understanding the mechanisms of SUI improvement by cell therapies.
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Cisplatin and cisplatin analogues perfusion through isolated rat heart: the effects of acute application on oxidative stress biomarkers
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01.02.2018 |
Stojic I.
Zivkovic V.
Srejovic I.
Nikolic T.
Jeremic N.
Jeremic J.
Djuric D.
Jovicic N.
Radonjic K.
Bugarcic Z.
Jakovljevic V.
Novokmet S.
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Molecular and Cellular Biochemistry |
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3 |
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© 2017, Springer Science+Business Media, LLC. Drug-induced oxidative stress can occur in numerous tissues and organ systems (liver, kidney, ear, nervous system, and cardiovascular system). Cancer therapy with cisplatin is associated with side effects to which oxidative stress may contribute. We have compared the influences of cisplatin (reference compound) and its’ analogues (dichloro(1,2-diaminocyclohexane)platinum(II) and chloro(2,2′:6′,2″-terpyridine)platinum(II)) in a model of isolated rat heart using the Langendorff technique. The production of oxidative stress biomarkers, antioxidant enzymes, myocardial damage, and expression of Bax, OH-1, and SODs were studied. Cisplatin and the analogues were perfused at concentration of 10−6 and 10−5 M during 30 min. The results of this study showed that examined platinum complexes had different ability to induce oxidative stress of isolated perfused rat heart. Varying the carrier ligands, such as 1,2-diaminocyclohexane and 2,2′:6′,2″-terpyridine, related to amino ligands (cisplatin) directly influenced the strength to induce production of oxidative stress biomarkers. Introducing 2,2′:6′,2″-terpyridine ligands provoked the smallest changes in antioxidant enzymes activity, lipid peroxidation, and expression of heme oxygenase-1, that undoubtedly indicated that this complex had the lowest impact on redox status in heart tissue. These findings may be useful in synthesis of novel platinum analogues with lower potential for oxidative stress induction. However, the fact that platinum complexes could induce toxic effects in the heart by other mechanisms should be taken into the consideration.
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Stress-induced depression and reactive schizophrenia
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02.01.2018 |
Smulevich A.
Germanova K.
Chitlova V.
Voronova E.
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International Journal of Culture and Mental Health |
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0 |
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© 2017 Informa UK Limited, trading as Taylor & Francis Group. A number of concepts exist which reveal an interaction between endogenous and psychogenic factors in stress-induced disorders in patients with schizophrenia. These concepts relate to psychological, pathophysiological, and sociological aspects of the problem. In this study we look at the respective states described within the clinical concept of reactive schizophrenia. Materials: Fifty clinical cases were included: 32 females and 18 males, mean age 38.6 ± 12.5. Thirty-three patients (66%) had a diagnosis of ‘schizophrenia’, 17 patients (34%) were diagnosed with ‘schizotypal personality disorder’ according to DSM-5 criteria. The performed examination included a clinical interview, analysis of the current clinical state, analysis of the medical history. Results: From the perspective of concept of ‘reactive schizophrenia’, the subjects of our study can be split into two groups based on their mechanism of development and psychogenic vs. endogenous contributions. These two groups may be characterized as ‘psychogenic provocation of a schizophreniform disorder’ and ‘endogenous provocation of a psychogenic disorder’ respectively. Conclusions: The results observed made it possible to re-establish the hypothesis of ‘reactive schizophrenia’. The principal feature is the specific interaction between endogenous and psychogenic factors, i.e. the psychogenic provocation of endogenous disorders.
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Examination stress among medical students: Prevalence causes and prevention
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01.01.2018 |
Bobrisheva-Pushkina N.
Kusnetsova L.
Popova O.
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Gigiena i Sanitariya |
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0 |
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© 2018 Izdatel'stvo Meditsina. All rights reserved. I.M.Sechenov First Moscow State Medical University, Moscow, 119991, Russian Federation There was executed the study including the examination of 833 students of 2-6 courses of the medical University concerning their subjective rating of the stress level on exams, its causes and the measures they used to reduce stress. 26.7% of students noted the high level of stress on examination, there was significantly increased the number of students with low-stress levels in students оf 3-4 courses, boys, and students with good and excellent grades note significantly less a high level of examination stress. The most common manifestations of stress are changes in the cardiovascular system (62% of the students) and autonomic nervous systems (48.6%), these manifestations were significantly less noted in students with good and excellent grades. In the course of training, there was discovered the increase in complaints of the frequent urination, loose stools and discomfort or pain in the abdomen. The main causes of stress at exams, according to students, there are a large amount and difficulty of exam material and the insufficient addressing of examination tasks in the classroom. In the dynamics of training, there is a significant reduction in the number of students who believe early acquaintance with the exam questions to be important, the sufficiency of the time devoted to self-education and an increase in the number of students recognizing it is necessary to reduce the waiting time of the call to the exam. Most popular methods of the reducing examination stress on younger courses are the use of rites, superstitions, and drugs, in the senior years. A growing number of individuals using the techniques of autogenic training was discovered. 49.9% of students do not fight with stress. 63.9% of students consider the introduction of elective subjects of “Prevention and correction of examination stress in students” to be necessary.
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The influence of the preoperative preload with carbohydrates upon metabolic, immune and cytokine statuses after reconstructive esophageal surgical interventions
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01.01.2018 |
Tarasova I.
Inviyaeva E.
Bunyatyan K.
Tskhovrebov A.
Nikoda V.
Shestakov A.
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Medical Immunology (Russia) |
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0 |
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© 2018, SPb RAACI. The aim of this prospective randomized clinical study was to investigate the role of preoperative carbohydrate admnistration in surgery-induced metabolic, immune and inflammatory reactions after thoracoabdominal operations. At the Surgical department I (B.V. Petrovsky National Research Center of Surgery), we investigated a modulatory role of carbohydrate preload upon surgical stress observed after major thoracoabdominal operations (thoracoscopic and open esophagectomy, retrosternal colonic esophagoplasty) followed by the enhanced recovery protocol. The study was performed in 2014-2017, it included 30 patients, divided into 2 groups. Group A patients (n = 16) received carbohydrates preload (12.5% maltodextrin solution per os or enterally). In patients with dysphagia, the 12.5% dextrose solution was used intravenously in equal volumes. Group B patients didn’t receive any additional preload with carbohydrates. The groups were age- and gender-matched, similar for disease and surgery types. Glucose and insulin levels (with HOMA insulin resistance index, HOMA-IR) were measured before surgery and on day +1, interleukin levels (IL-6, IL-10, IL-8) and index IL-8/IL-10 were assessed before surgery, and on days +1 and +5 after surgery. Cell-mediated immunity was investigated before surgery and on day +5. The stress-induced hyperglycemia (> 7.8 mmol/L) was detected more frequently in group B (50%), than in group A (6%), p = 0.012. Insulin resistance measured by HOMA-IR in group B was detected in 71% of patients and in 25% patients of group A only, p = 0.027. Individual analysis of immune response demonstrated that a trend for immune recovery was detected by the day +5 post-op in the group A. Postoperative levels of IL-6 and IL-10 were lower on day +1 and +5 in group A. Morbidity rates and the terms of hospitalization were similar in both groups. Local postsurgical infections in group A were developed in 6% of the patients vs 35.6% in group B (p = 0.072). In conclusion, a complex study of surgical stress, i.e., metabolic, immune and inflammatory reactions after esophageal surgery has shown that the carbohydrate preload decreased the incidence of postoperative insulin resistance and stress-induced hyperglycemia, being accompanied by lower release of proinflammatory cytokines and provides positive effects upon the patient’s immune system.
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The influence of exams stress on Brux activity in Russian dental students
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01.01.2018 |
Medovnikova D.
Ytuzh A.
Soykher M.
Pisarenko I.
Onyanova A.
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Biomedical and Pharmacology Journal |
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0 |
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Published by Oriental Scientific Publishing Company © 2018. The study assessed stress and brux activity among dental students during exam (stress) and non-examination (non-stress) periods. The study was initiated as a single group design with the total number of participants 36 (25 females and 11 males). All the participants were examined twice (once in a stress period and once in a non-stress period) according to “Clinical Functional Analysis”, which includes questions about students’ medical and dental history, as well as muscle palpation results. Two «BruxCheckers» (BCs) were applied, one for the upper jaw, the other for the lower jaw, two times for examination and non-examination periods. After the use, the «BCs» were photographed according to the research protocol and the abraded facets area on «BCs» was calculated in square millimeters. The research showed that during a stress period students may have headaches, cramps and pain in shoulder and neck muscles. The research also revealed that during the stress situation the abraded area shifts from frontal teeth to chewing teeth and brux episodes can occur more frequently and with a higher load. Chewing teeth (premolars in our study) are more adapted and more useful for such a condition. Accordingly, our students shifted their brux behavior from teeth 33 and 31 to teeth 15 and 24. Therefore, exams are a strong stress factor for dental students. In turn, prolongated stress can be an indicator of risk factor and have a negative effect for health of the craniomandibular system.
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Mitochondria-targeted antioxidant SKQ1 protects cornea from oxidative damage induced by ultraviolet irradiation and mechanical injury
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01.01.2018 |
Zernii E.
Gancharova O.
Tiulina V.
Zamyatnin A.
Philippov P.
Baksheeva V.
Senin I.
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BMC Ophthalmology |
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0 |
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© 2018 The Author(s). Background: Cornea protects the eye against natural and anthropogenic ultraviolet (UV) damage and mechanical injury. Corneal incisions produced by UV lasers in ophthalmic surgeries are often complicated by oxidative stress and inflammation, which delay wound healing and result in vision deterioration. This study trialed a novel approach to prevention and treatment of iatrogenic corneal injuries using SkQ1, a mitochondria-targeted antioxidant approved for therapy of polyethiological dry eye disease. Methods: Rabbit models of UV-induced and mechanical corneal damage were employed. The animals were premedicated or treated with conjunctival instillations of 7.5 μ M SkQ1. Corneal damage was assessed by fluorescein staining and histological analysis. Oxidative stress in cornea was monitored by measuring malondialdehyde (MDA) using thiobarbituric acid assay. Total antioxidant activity (AOA) was determined using hemoglobin/H2O2/luminol assay. Glutathione peroxidase (GPx) and superoxide dismutase (SOD) activities were measured using colorimetric assays. Results: In both models corneas exhibited fluorescein-stained lesions, histologically manifesting as basal membrane denudation, apoptosis of keratocytes, and stromal edema, which were accompanied by oxidative stress as indicated by increase in lipid peroxidation and decline in AOA. The UV-induced lesions were more severe and long healing as corneal endothelium was involved and GPx and SOD were downregulated. The treatment inhibited loss of keratocytes and other cells, facilitated re-epithelialization and stromal remodeling, and reduced inflammatory infiltrations and edema thereby accelerating corneal healing approximately 2-fold. Meanwhile the premedication almost completely prevented development of UV-induced lesions. Both therapies reduced oxidative stress, but only premedication inhibited downregulation of the innate antioxidant activity of the cornea. Conclusions: SkQ1 efficiently prevents UV-induced corneal damage and enhances corneal wound healing after UV and mechanical impacts common to ocular surgery. Its therapeutic action can be attributed to suppression of mitochondrial oxidative stress, which in the first case embraces all corneal cells including epitheliocytes, while in the second case affects residual endothelial cells and stromal keratocytes actively working in wound healing. We suggest SkQ1 premedication to be used in ocular surgery for preventing iatrogenic complications in the cornea.
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Coronary computed tomographic angiography in the diagnosis of coronary artery disease in outpatient settings
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01.01.2018 |
El Manaa H.
Shchekochikhin D.
Shabanova M.
Gognieva D.
Lomonosova A.
Gogiberidze N.
Ternovoy S.
Shariya M.
Kondrashina O.
Serova N.
Mesitskaya D.
Kopylov P.
Syrkin A.
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Russian Electronic Journal of Radiology |
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0 |
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© 2018 Russian Electronic Journal of Radiology. All rights reserved. Purpose. The purpose of this study is to compare the diagnostic performance of coronary computed tomographic angiography (CCTA) and stress test as a first-line examination for the diagnosis of stable coronary artery disease in outpatient settings. Materials and methods. The study prospectively enrolled 74 patients with typical and atypical angina symptoms lasting longer than three weeks, mean age-63,9±10,4 years, 28 (37,8%) women. Exclusion criteria: contraindications to iodine-containing contrast media, statins; GFR <45ml/min/1,73 sq m; inability to perform stress testing. All patients consistently underwent stress testing (standard Bruce protocol and The Modified Bruce protocol) and standard CCTA on a 640-slice CT scanner Toshiba Aquilion ONE. We determined pretest probability of CAD and stratified risks using SCORE and ACC/AHA scales. Statistical processing was performed with SPSS version 11,5 software. Results. Treadmill test results were positive in 51,4% of patients, among them according to CCTA: 19,15% had stenosis = 70%, 35,3% had stenosis 50-69%. CCTA revealed that 28,6% of males and 46,2% of females with typical and 66,7% of males and 50,0% of females with atypical angina symptoms with positive treadmill test had no evidence of atherosclerotic lesions. 4,05% of patients with negative stress testing had evidence of significant arterial lesions (stenosis >70%). According to the SCORE risk estimation, 67,6% of patients with atherosclerotic changes in coronary arteries had high risk, ACC/AHA score-70,6%. The sensitivity and specificity of the SCORE and ACC/AHA scales in revealing coronary atherosclerosis were 83% and 71%, 81% and 88%, respectively (p> 0.05). Conclusion. CCTA can be considered as a method for the primary diagnosis of stable coronary artery disease in outpatient practice.
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Regularities of the oxidative stress processes in case of bleedings from acute and chronic ulcers of the stomach and duodenum
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01.01.2018 |
Silina E.
Sobirovz M.
Bolevich S.
Stupin V.
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OnLine Journal of Biological Sciences |
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0 |
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© 2018 Ekaterina Vladimirovna Silina, Mukimdjon Ahmadzhonovich Sobirovz, Sergey Brankovich Bolevich and Aleksandrovich Stupin. The main aim of the study was to determine ways of improving the results of treating patients with ulcer bleeding of various nature and severity. It was provided by the system study of free radical processes and evaluation of the effectiveness of timely antioxidant therapy. Material and methods. The study included 153 patients aged 18-94 years with acute and chronic gastric and duodenal ulcers complicated by gastroduodenal bleeding. Patients were divided into two groups: group I (experimental group) included 62 patients who received antioxidative therapy with reamberin as a part of the basic therapy; and group II (control group) included 91 patients who received standard therapy. Various parameters of Free Radical Processes (FRP) were studied in dynamics in all patients. Results. We revealed the significance of oxidative stress on the first day of hospitalization in patients with gastrointestinal ulcerous bleeding of various character and severity. It was discovered mostly in severe patients with acute Gastroduodenal Ulcerous Bleeding (GDUB). In case of mild gastrointestinal ulcerous bleeding, oxidative stress disorders affected an oxygen stage of oxidative stress and represented themselves adaptive compensatory mechanisms. As the severity of the disease increased, intensification of an oxidant stress was manifested by a decrease in oxygen activity and an increase in lipid imbalance. Imbalance in free radical processes continued for a long time until discharge of patients from the hospital. The data obtained claimed to be the basis for recommendation to include antioxidant energy-conserving therapy in the complex of therapeutic measures in the earliest possible terms. We found out an efficacy of using succinic acid therapy with reamberin in patients with gastrointestinal bleeding. Positive effect of succinic acid on the markers of oxidative stress was confirmed by improvement in the disease pattern and success of the treatment.
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Mechanical stress-induced subcellular re-localization of N-terminally truncated tobacco Nt-4/1 protein
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01.01.2018 |
Atabekova A.
Lazareva E.
Strelkova O.
Solovyev A.
Morozov S.
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Biochimie |
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© 2017 Elsevier B.V. and Société Française de Biochimie et Biologie Moléculaire (SFBBM) The Nicotiana tabacum 4/1 protein (Nt-4/1) of unknown function expressed in plant vasculature has been shown to localize to cytoplasmic bodies associated with endoplasmic reticulum. Here, we analyzed molecular interactions of an Nt-4/1 mutant with a deletion of 90 N-terminal amino acid residues (Nt-4/1d90) having a diffuse GFP-like localization. Upon transient co-expression with VAP27, a membrane protein known to localize to the ER, ER-plasma membrane contact sites and plasmodesmata, Nt-4/1d90 was concentrated around the cortical ER tubules, forming a network matching the shape of the cortical ER. Additionally, in response to mechanical stress, Nt-4/1d90 was re-localized to small spherical bodies, whereas the subcellular localization of VAP27 remained essentially unaffected. The Nt-4/1d90-containing bodies associated with microtubules, which underwent noticeable bundling under the conditions of mechanical stress. The Nt-4/1d90 re-localization to spherical bodies could also be induced by incubation at an elevated temperature, although under heat shock conditions the re-localization was less efficient and incomplete. An Nt-4/1d90 mutant, which had phosphorylation-mimicking mutations in a predicted cluster of four potentially phosphorylated residues, was found to both inefficiently re-localize to spherical bodies and tend to revert back to the initial diffuse localization. The presented data show that Nt-4/1 has a potential for response to stresses that is manifested by its deletion mutant Nt-4/1d90, and this response can be mediated by protein dephosphorylation.
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Ipidacrine in combination therapy regimens of functional constipation
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01.01.2018 |
Chernus N.
Vanchakova N.
Sivkova S.
Sivkov A.
Gorenkov R.
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Terapevticheskii Arkhiv |
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© 2018 Media Sphera Publishing Group. All rights reserved. Aim. Analysis of the treatment response rates of different therapy regimens of functional constipation, including Ipidacrine, a cholinesterase inhibitor, based on assessment of adaptation and compensatory mechanisms in the therapy forecast. Materials and methods. 77 functional slow-transit constipation patients were examined after therapy regimens of functional constipation, the mean age is 44.30±14.58 y.o. Results and discussion. The treatment response rates of different therapies with Ipidacrine depends on the patient's initial adaptation and compensatory mechanisms (ACM index); certain aspects allowing to predict the expected result depending on the current mental state were identified; the severity of the state of functional constipation, ACM index and MMPI test psychometric indicators are correlated; adaptation and compensatory mechanisms of functional constipation patients were found to be reduced; the prognosis of the treatment response rates and, accordingly, the choice of the therapy regimen depend on the patient's adaptation potential (index). Conclusions. Therapy regimens for functional constipation patients should be selected on the basis of the original ACM index, behavioral pattern, degree of compliance and the patient’s age.
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Cardioprotective effects of Galium verum L. extract against myocardial ischemia-reperfusion injury
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01.01.2018 |
Bradic J.
Jeremic N.
Petkovic A.
Jeremic J.
Zivkovic V.
Srejovic I.
Sretenovic J.
Matic S.
Jakovljevic V.
Tomovic M.
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Archives of Physiology and Biochemistry |
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© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group. The aim of our study was to determine a chemical composition of methanol extract of Galium verum as well as to assess its effects on functional recovery and redox status of isolated rat heart after ischemia. Rats were divided into control and G. verum group, which included animals treated with 500 mg/kg of methanol extract of G. verum for 28 days. Parameters of heart function and oxidative stress markers were estimated. Cell morphology was evaluated by hematoxylin and eosin (HE) staining. Our results demonstrated for the first time that G. verum extract preserved cardiac contractility, systolic, and diastolic function as wells as structural damage of the heart after ischemia. Furthermore, G. verum extract modulated the activity of antioxidant enzymes and alleviated the production of pro-oxidants.
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