Vegetation shift
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Besides being responsible for olfaction and air intake, the nose contains abundant vasculature and autonomic nervous system innervations, and it is a cerebrospinal fluid clearance site. Therefore, the nose is an attractive target for functional MRI (fMRI). Yet, nose fMRI has not been possible so far due to signal losses originating from nasal air-tissue interfaces. Here, we demonstrated feasibility of nose fMRI by using novel ultrashort/zero echo time (TE) MRI. Results obtained in the resting-state from 13 healthy participants at 7T and in 5 awake mice at 9.4T revealed a highly reproducible resting-state nose functional network that likely reflects autonomic nervous system activity. Another network observed in humans involves the nose, major brain vessels and CSF spaces, presenting a temporal dynamic that correlates with heart rate and breathing rate. These resting-state nose functional signals should help elucidate peripheral and central nervous system integrations.
- MeSH
- autonomní nervový systém fyziologie diagnostické zobrazování MeSH
- dospělí MeSH
- lidé MeSH
- magnetická rezonanční tomografie * metody MeSH
- mapování mozku metody MeSH
- mladý dospělý MeSH
- mozek fyziologie diagnostické zobrazování MeSH
- myši MeSH
- nos * fyziologie diagnostické zobrazování MeSH
- odpočinek fyziologie MeSH
- srdeční frekvence fyziologie MeSH
- zvířata MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- myši MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
OBJECTIVE: To examine the associations between characteristics of daily rainfall (intensity, duration, and frequency) and all cause, cardiovascular, and respiratory mortality. DESIGN: Two stage time series analysis. SETTING: 645 locations across 34 countries or regions. POPULATION: Daily mortality data, comprising a total of 109 954 744 all cause, 31 164 161 cardiovascular, and 11 817 278 respiratory deaths from 1980 to 2020. MAIN OUTCOME MEASURE: Association between daily mortality and rainfall events with return periods (the expected average time between occurrences of an extreme event of a certain magnitude) of one year, two years, and five years, with a 14 day lag period. A continuous relative intensity index was used to generate intensity-response curves to estimate mortality risks at a global scale. RESULTS: During the study period, a total of 50 913 rainfall events with a one year return period, 8362 events with a two year return period, and 3301 events with a five year return period were identified. A day of extreme rainfall with a five year return period was significantly associated with increased daily all cause, cardiovascular, and respiratory mortality, with cumulative relative risks across 0-14 lag days of 1.08 (95% confidence interval 1.05 to 1.11), 1.05 (1.02 to 1.08), and 1.29 (1.19 to 1.39), respectively. Rainfall events with a two year return period were associated with respiratory mortality only, whereas no significant associations were found for events with a one year return period. Non-linear analysis revealed protective effects (relative risk <1) with moderate-heavy rainfall events, shifting to adverse effects (relative risk >1) with extreme intensities. Additionally, mortality risks from extreme rainfall events appeared to be modified by climate type, baseline variability in rainfall, and vegetation coverage, whereas the moderating effects of population density and income level were not significant. Locations with lower variability of baseline rainfall or scarce vegetation coverage showed higher risks. CONCLUSION: Daily rainfall intensity is associated with varying health effects, with extreme events linked to an increasing relative risk for all cause, cardiovascular, and respiratory mortality. The observed associations varied with local climate and urban infrastructure.
Whereas temporal variability of plant phenology in response to climate change has already been well studied, the spatial variability of phenology is not well understood. Given that phenological shifts may affect biotic interactions, there is a need to investigate how the variability in environmental factors relates to the spatial variability in herbaceous species' phenology by at the same time considering their functional traits to predict their general and species-specific responses to future climate change. In this project, we analysed phenology records of 148 herbaceous species, which were observed for a single year by the PhenObs network in 15 botanical gardens. For each species, we characterised the spatial variability in six different phenological stages across gardens. We used boosted regression trees to link these variabilities in phenology to the variability in environmental parameters (temperature, latitude and local habitat conditions) as well as species traits (seed mass, vegetative height, specific leaf area and temporal niche) hypothesised to be related to phenology variability. We found that spatial variability in the phenology of herbaceous species was mainly driven by the variability in temperature but also photoperiod was an important driving factor for some phenological stages. In addition, we found that early-flowering and less competitive species characterised by small specific leaf area and vegetative height were more variable in their phenology. Our findings contribute to the field of phenology by showing that besides temperature, photoperiod and functional traits are important to be included when spatial variability of herbaceous species is investigated.
- MeSH
- fenotyp MeSH
- fotoperioda * MeSH
- klimatické změny MeSH
- listy rostlin * fyziologie MeSH
- roční období MeSH
- rostliny MeSH
- teplota MeSH
- Publikační typ
- časopisecké články MeSH
Mobile wireless communication technologies have now become an everyday part of our lives, 24 hours a day, 7 days a week. Monitoring the autonomous system under exposition to electromagnetic fields may play an important role in broading of our still limited knowledge on their effect on human body. Thus, we studied the interaction of the high frequency electromagnetic field (HF EMF) with living body and its effect on the autonomic control of heart rate using Heart Rate Variability (HRV) linear and nonlinear analyses in healthy volunteers. A group of young healthy probands (n=30, age mean: 24.2 ± 3.5 years) without any symptoms of disease was exposed to EMF with f=2400 MHz (Wi Fi), and f=2600 MHz (4G) for 5 minutes applied on the chest area. The short-term heart rate variability (HRV) metrics were used as an indicator of complex cardiac autonomic control. The evaluated HRV parameters: RR interval (ms), high frequency spectral power (HF-HRV in [ln(ms2)]) as an index of cardiovagal control, and a symbolic dynamic index of 0V %, indicating cardiac sympathetic activity. The cardiac-linked parasympathetic index HF-HRV was significantly reduced (p =0.036) and sympathetically mediated HRV index 0V % was significantly higher (p=0.002) during EMF exposure at 2400 MHz (Wi-Fi), compared to simulated 4G frequency 2600 MHz. No significant differences were found in the RR intervals. Our results revealed a shift in cardiac autonomic regulation towards sympathetic overactivity and parasympathetic underactivity indexed by HRV parameters during EMF exposure in young healthy persons. It seems that HF EMF exposure results in abnormal complex cardiac autonomic regulatory integrity which may be associated with higher risk of later cardiovascular complications already in healthy probands.
- MeSH
- autonomní nervový systém MeSH
- dospělí MeSH
- elektromagnetická pole * škodlivé účinky MeSH
- kardiovaskulární nemoci * MeSH
- lidé MeSH
- mladý dospělý MeSH
- rizikové faktory kardiovaskulárních chorob MeSH
- rizikové faktory MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladý dospělý MeSH
- Publikační typ
- časopisecké články MeSH
Distributed cutaneous tissue blood volume oscillations contain information on autonomic nervous system (ANS) regulation of cardiorespiratory activity as well as dominating thermoregulation. ANS associated with low-frequency oscillations can be quantified in terms of frequencies, amplitudes, and phase shifts. The relative order between these faculties may be disturbed by conditions colloquially termed 'stress'. Photoplethysmography imaging, an optical non-invasive diagnostic technique provides information on cutaneous tissue perfusion in the temporal and spatial domains. Using the cold pressure test (CPT) in thirteen healthy volunteers as a well-studied experimental intervention, we present a method for evaluating phase shifts in low- and intermediate frequency bands in forehead cutaneous perfusion mapping. Phase shift changes were analysed in low- and intermediate frequency ranges from 0.05 Hz to 0.18 Hz. We observed that time waveforms increasingly desynchronised in various areas of the scanned area throughout measurements. An increase of IM band phase desynchronization observed throughout measurements was comparable in experimental and control group, suggesting a time effect possibly due to overshooting the optimal relaxation duration. CPT triggered an increase in the number of points phase-shifted to the reference that was specific to the low frequency range for phase-shift thresholds defined as π/4, 3π/8, and π/2 rad, respectively. Phase shifts in forehead blood oscillations may infer changes of vascular tone due to activity of various neural systems. We present an innovative method for the phase shift analysis of cutaneous tissue perfusion that appears promising to assess ANS change processes related to physical or psychological stress. More comprehensive studies are needed to further investigate the reliability and physiological significance of findings.
- MeSH
- autonomní nervový systém MeSH
- fotopletysmografie * metody MeSH
- kůže * krevní zásobení MeSH
- lidé MeSH
- perfuze MeSH
- reprodukovatelnost výsledků MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
OBJECTIVE: This study aimed to identify diets with improved nutrient quality and environmental impact within the boundaries of dietary practices. DESIGN: We used Data Envelopment Analysis to benchmark diets for improved adherence to food-based dietary guidelines (FBDG). We then optimised these diets for dietary preferences, nutrient quality and environmental impact. Diets were evaluated using the Nutrient Rich Diet score (NRD15.3), diet-related greenhouse gas emission (GHGE) and a diet similarity index that quantified the proportion of food intake that remained similar as compared with the observed diet. SETTING: National dietary surveys of four European countries (Denmark, Czech Republic, Italy and France). SUBJECTS: Approximately 6500 adults, aged 18-64 years. RESULTS: When dietary preferences were prioritised, NRD15·3 was ~6 % higher, GHGE was ~4 % lower and ~85 % of food intake remained similar. This diet had higher amounts of fruit, vegetables and whole grains than the observed diet. When nutrient quality was prioritised, NRD15·3 was ~16 % higher, GHGE was ~3 % lower and ~72 % of food intake remained similar. This diet had higher amounts of legumes and fish and lower amounts of sweetened and alcoholic beverages. Finally, when environmental impact was prioritised, NRD15·3 was ~9 % higher, GHGE was ~21 % lower and ~73 % of food intake remained similar. In this diet, red and processed meat partly shifted to either eggs, poultry, fish or dairy. CONCLUSIONS: Benchmark modelling can generate diets with improved adherence to FBDG within the boundaries of dietary practices, but fully maximising health and minimising GHGE cannot be achieved simultaneously.
- MeSH
- benchmarking * MeSH
- dieta normy MeSH
- dospělí MeSH
- energetický příjem MeSH
- lidé MeSH
- uhlíková stopa * MeSH
- výživa - přehledy MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
- Evropa MeSH
- Francie MeSH
- Itálie MeSH
Infekční endokarditida (IE) je závažné onemocnění s vysokou morbiditou a mortalitou. Častější je u pacientů se strukturální patologií srdce. IE nejčastěji postihuje srdeční chlopně, patologický proces může vzniknout i na nástěnném endokardu nebo na cizích tělesech, která jsou v srdci umístěna. U dětí se strukturálně normálním srdcem patří mezi rizikové skupiny pro vznik IE jedinci s malignitami, nezralí novorozenci, pacienti se zavedeným centrálním žilním katetrem, děti s extrakardiálními strukturálními malformacemi nebo genetickými syndromy a mladí narkomani. Jedno z rizik je embolizace části vegetace do dalších orgánových systémů. Vznik IE je možný i na normálním srdci a bez rizikových faktorů v anamnéze. V kazuistice je demonstrována infekční endokarditida tříletého zdravého dítěte s významnou embolizací do mozku.
Infective endocarditis with embolization of vegetation into the central nervous system Infective endocarditis (IE) is a serious disease with high morbidity and mortality. It is more common in patients with structural pathology of the heart. IE most often affects the heart valves, the pathological process also can affect the wall endocardium or artificial material in the heart. In children with a structurally normal heart, individuals with malignancies, immature neonates, patients with an implanted central venous catheter, children with extracardiac structural malformations or genetic syndromes, and young drug addicts are at risk for developing IE. One of the risks is the embolization of part of the vegetation into other organ systems. IE is possible even in a normal heart and without a history of risk factors. The case report demonstrates the infective endocarditis of a three-year-old healthy child with significant embolization into the brain.
- MeSH
- antibakteriální látky terapeutické užití MeSH
- echokardiografie metody MeSH
- embolie etiologie terapie MeSH
- endokarditida * diagnóza farmakoterapie MeSH
- klinické laboratorní techniky MeSH
- lidé MeSH
- magnetická rezonanční tomografie metody MeSH
- mitrální chlopeň mikrobiologie patologie MeSH
- předškolní dítě MeSH
- výsledek terapie MeSH
- Check Tag
- lidé MeSH
- předškolní dítě MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
BACKGROUND: In modern urban environments children have a high incidence of inflammatory disorders, including allergies, asthma, and type1 diabetes. The underlying cause of these disorders, according to the biodiversity hypothesis, is an imbalance in immune regulation caused by a weak interaction with environmental microbes. In this 2-year study, we analyzed bacterial community shifts in the soil surface in day-care centers and commensal bacteria inhabiting the mouth, skin, and gut of children. We compared two different day-care environments: standard urban day-care centers and intervention day-care centers. Yards in the latter were amended with biodiverse forest floor vegetation and sod at the beginning of the study. RESULTS: Intervention caused a long-standing increase in the relative abundance of nonpathogenic environmental mycobacteria in the surface soils. Treatment-specific shifts became evident in the community composition of Gammaproteobacteria, Negativicutes, and Bacilli, which jointly accounted for almost 40 and 50% of the taxa on the intervention day-care children's skin and in saliva, respectively. In the year-one skin swabs, richness of Alpha-, Beta-, and Gammaproteobacteria was higher, and the relative abundance of potentially pathogenic bacteria, including Haemophilus parainfluenzae, Streptococcus sp., and Veillonella sp., was lower among children in intervention day-care centers compared with children in standard day-care centers. In the gut, the relative abundance of Clostridium sensu stricto decreased, particularly among the intervention children. CONCLUSIONS: This study shows that a 2-year biodiversity intervention shapes human commensal microbiota, including taxa that have been associated with immune regulation. Results indicate that intervention enriched commensal microbiota and suppressed the potentially pathogenic bacteria on the skin. We recommend future studies that expand intervention strategies to immune response and eventually the incidence of immune-mediated diseases.
- MeSH
- Bacteria MeSH
- biodiverzita MeSH
- dítě MeSH
- lidé MeSH
- mikrobiota * MeSH
- půda MeSH
- zařízení denní péče pro děti MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Light spectra significantly influence plant metabolism, growth and development. Here, we review the effects of monochromatic blue, red and green light compared to those of multispectral light sources on the morpho-anatomical, photosynthetic and molecular traits of herbaceous plants. Emphasis is given to the effect of light spectra on the accumulation of secondary metabolites, which are important bioactive phytochemicals that determine the nutritional quality of vegetables. Overall, blue light may promote the accumulation of phenylpropanoid-based compounds without substantially affecting plant morpho-anatomical traits compared to the effects of white light. Red light, conversely, strongly alters plant morphology and physiology compared to that under white light without showing a consistent positive effect on secondary metabolism. Due to species-specific effects and the small shifts in the spectral band within the same color that can substantially affect plant growth and metabolism, it is conceivable that monochromatic light significantly affects not only plant photosynthetic performance but also the "quality" of plants by modulating the biosynthesis of photoprotective compounds.
Devětatřicetiletý muž s anamnézou plastiky bikuspidální aortální chlopně byl přijat po autonehodě do Fakultní nemocnice Ostrava pro pravostrannou hemiparézu, zpomalené psychomotorické tempo a dezorientaci. Vstupní výpočetní tomografie (CT) prokázala subarachnoidální krvácení temporo-parietálně. Magnetická rezonance (MR) mozku odhalila difuzně lokalizovaná prokrvácená ischemická ložiska. Z ostatních vážných poranění měl nemocný rupturu sleziny s následným hemoperitoneem, která si vynutila urgentní splenektomii. V klinickém obraze nemocného dominovala neurologická symptomatologie, doplněná o petechie na končetinách a průkaz Staphylococcus aureus v likvoru i v hemokulturách. Z tohoto důvodu byla stanovena pracovní diagnóza meningoencefalitidy a nemocný byl léčen kombinací antibiotik. Vstupní transtorakální i transezofageální echokardiografické vyšetření bylo negativní. Teprve kontrolní jícnová echokardiografie, provedená s odstupem dvou týdnů od první pro recidivu febrilií, detekovala vegetace na aortální, mitrální chlopni a absces prominující na síňovou stranu předního mitrálního cípu. Vzhledem k nálezu vegetací byla přehodnocena diagnóza na infekční endokarditidu se septickými embolizacemi do mozku. Pro selhání konzervativní terapie infekční endokarditidy byla provedena náhrada aortální a mitrální chlopně, následovaná protrahovanou antibiotickou léčbou dle citlivosti. Dodatečným anamnestickým šetřením bylo zjištěno, že měsíc před manifestací onemocnění pacient utrpěl řezné poranění bérce, což mohla být vstupní brána infekce. Kazuistika prezentuje případ nemocného s obtížně a opožděně diagnostikovanou infekční endokarditidou, kde razantní antibiotická i chirurgická léčba vedla k plnému vyléčení nemocného.
A 39-year-old male with a history of bicuspid aortic valvuloplasty was admitted after a car accident for right-sided hemiparesis, cognitive slowing, and disorientation to the Teaching Hospital in Ostrava. Computed tomography (CT) at admission detected subarachnoidal bleeding in the temporoparietal region. Moreover, magnetic resonance imaging (MRI) detected small diffuse ischaemic lesions surrounded by microbleeds. Amongst other major injury, the patient suffered from splenic rupture, which led to urgent splenectomy. Major symptoms were of neurological origin, accompanied by forearm petechia and confirmed presence of Staphylococcus aureus in both blood samples and cerebrospinal fluid. Therefore preliminary diagnosis of meningoencephalitis was established and the patient was treated with combination of antibiotics. Transthoracic and transesophageal echocardiography at admission was negative. Not until the second echocardiography, performed two weeks after the first one, due to elevated body temperature, vegetations on both aortic and mitral valve and the abscess on atrial side of anterior mitral valve leaflet were observed. Therefore the meaning of petechia was rethought, and a new diagnosis of infective endocarditis (IE) with septic brain emboli was established. Due to the apparent failure of conservative treatment, the patient underwent aortic and mitral valve replacement, followed by prolonged cultivation-based antibiotic therapy. In addition, one month before the presentation patient suffered from cut injury of his shank, which may have been the entrance point of infection. This case report presents an elaborate and delayed IE diagnosis where both vigorous antibiotic and surgical treatment led to full recovery of the patient.
- Klíčová slova
- abdominalgie,
- MeSH
- antibakteriální látky terapeutické užití MeSH
- bolest etiologie MeSH
- chirurgická náhrada chlopně MeSH
- dopravní nehody MeSH
- dospělí MeSH
- echokardiografie transezofageální MeSH
- endokarditida * chirurgie diagnóza etiologie patologie MeSH
- hemoperitoneum diagnostické zobrazování MeSH
- horečka etiologie MeSH
- intrakraniální embolie MeSH
- ischemie mozku diagnostické zobrazování patologie MeSH
- lidé MeSH
- magnetická rezonanční tomografie MeSH
- meningoencefalitida diagnóza MeSH
- mozek diagnostické zobrazování patologie MeSH
- neurologické manifestace * MeSH
- neúspěšná terapie MeSH
- paréza etiologie MeSH
- plíce diagnostické zobrazování patologie MeSH
- počítačová rentgenová tomografie MeSH
- poranění dolní končetiny komplikace MeSH
- purpura etiologie MeSH
- ruptura sleziny chirurgie diagnostické zobrazování MeSH
- splenektomie MeSH
- srdeční chlopně chirurgie patologie MeSH
- stafylokokové infekce etiologie krev mozkomíšní mok MeSH
- Staphylococcus aureus patogenita MeSH
- subarachnoidální krvácení diagnostické zobrazování patologie MeSH
- výsledek terapie MeSH
- zmatenost etiologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
