Riziko onemocnění koronárních tepen nejen u dospělých, ale i u dětí především souvisí s rizikovými faktory, které vedou k akceleraci aterosklerózy. Mezi tyto faktory se tradičně řadí hypercholesterolemie, obezita, diabetes mellitus, hypertenze a kouření. Další méně známou rizikovou skupinou pro koronární onemocnění jsou jedinci se srdečními, cévními či dalšími chronickými onemocněními. Jedná se především o chronická onemocnění ledvin, chronická zánětlivá onemocnění, malignity, některé vrozené vady srdce, vrozené či získané anomálie koronárních tepen, včetně stavů po intervencích na koronárních tepnách, Kawasakiho nemoc, případně koronární vaskulopatie štěpu po transplantaci srdce. Tato onemocnění musejí proto být zohledněna při stratifikaci kardiovaskulárního rizika a u dětí s uvedenými onemocněními by měl být práh pro zahájení léčby tradičních kardiovaskulárních rizikových faktorů nižší. Článek vychází z nedávno publikovaných doporučení American Heart Association. Jeho smyslem je upozornit nejen na tradiční kardiovaskulární rizikové faktory, ale také právě na asociaci některých chronických onemocnění s akcelerací aterosklerotického postižení koronárních tepen a zároveň nabídnout doporučení ke stratifikaci a snížení tohoto rizika již od dětství.
Coronary artery disease risk not only in adults but also in children is predominantly related to risk factors associated with atherosclerosis. These traditional cardiovascular risk factors include hypercholesterolaemia, obesity, diabetes mellitus, hypertension and smoking. Another high risk group for coronary artery disease are individuals with cardiac, vascular or other chronic diseases. These include chronic kidney diseases, chronic inflammatory diseases, malignancies, certain congenital heart defects, inborn or acquired coronary anomalies including interventions on coronary arteries, Kawasaki disease and cardiac allograft vasculopathy in heart transplant recipients. The presence of these chronic conditions should modify the risk assessment and de- crease the threshold for initiation of treatment of traditional cardiovascular risk factors in this subpopulation. The presented review is based on the recently published scientific statement from the American Heart Association. Its aim is to increase awareness of traditional cardiovascular risk factors in children as well as of the association of certain chronic conditions with accelerated atherosclerosis of coronary arteries. It also offers recommendations for the assessment and reduction of coronary artery disease risk already from childhood.
- MeSH
- ateroskleróza etiologie patofyziologie MeSH
- chronická renální insuficience diagnóza komplikace terapie MeSH
- diabetes mellitus diagnóza terapie MeSH
- hodnocení rizik * MeSH
- hyperlipoproteinemie typ II diagnóza komplikace terapie MeSH
- hypertenze terapie MeSH
- Kawasakiho syndrom komplikace MeSH
- kouření tabáku patofyziologie MeSH
- lidé MeSH
- nádory komplikace MeSH
- nemoci koronárních tepen * etiologie prevence a kontrola terapie MeSH
- obezita komplikace terapie MeSH
- rizikové faktory kardiovaskulárních chorob * MeSH
- statiny terapeutické užití MeSH
- vrozené srdeční vady komplikace MeSH
- Check Tag
- lidé MeSH
Anaplasma phagocytophilum is the causative agent of tick-borne fever (TBF) and human granulocytic anaplasmosis (HGA) and is currently considered an emerging disease in the USA, Europe, and Asia. The increased prevalence of A. phagocytophilum as a human pathogen requires the detailed characterization of human isolates and the implementation of appropriate animal models. In this study, we demonstrated that the dynamics of infection with the human isolate of A. phagocytophilum NY-18 was variable in three different strains of mice (SCID, C3H/HeN, BALB/c). We further evaluated the ability of Ixodes ricinus to acquire and transmit A. phagocytophilum NY-18 and compared it with Ixodes scapularis. Larvae of both tick species effectively acquired the pathogen while feeding on infected mice. The infection rates then decreased during the development to nymphs. Interestingly, molted I. ricinus nymphs were unable to transmit the pathogen to naïve mice, which contrasted with I. scapularis. The results of our study suggest that I. ricinus is not a competent vector for the American human Anaplasma isolate. Further studies are needed to establish reliable transmission models for I. ricinus and European human isolate(s) of A. phagocytophilum.
- Publikační typ
- časopisecké články MeSH
Závěrečná práce NCONZO
1 svazek : grafy, tabulky ; 30 cm + 1 CD
- MeSH
- farmaceutický laborant výchova MeSH
- kontinuální vzdělávání farmaceutů MeSH
- nemocniční lékárny MeSH
- odborná způsobilost MeSH
- průzkumy a dotazníky MeSH
- Konspekt
- Farmacie. Farmakologie
- NLK Publikační typ
- závěrečné práce
Ticks possess components of a primordial complement system that presumably play a role in the interaction of the tick immune system with tick-borne pathogens and affect their transmission. Here we characterized a novel complement component, tagged as IrC2/Bf, from the hard tick Ixodes ricinus, the principal vector of Lyme disease in Europe. IrC2/Bf is a multi-domain molecule composed of 5-7 CCP modules, varied by alternative splicing, followed by a von Willebrand factor A domain and a C-terminal trypsin-like domain. The primary structure and molecular architecture of IrC2/Bf displays the closest homology to the C3-complement component convertases described in horseshoe crabs. The irc2/bf gene is mainly expressed in the tick fat body associated with the trachea and, as determined by western blotting, the protein is present in low amounts in tick hemolymph. Expression of irc2/bf mRNA was significantly up-regulated in response to the intra-hemocoelic injection of the yeast Candida albicans and all tested Borrelia sp. strains (B. burgdorferi NE5264, B. burgdorferi CB26, B. garinii MSLB, B. afzelii CB43), but was not affected by injection of model Gram-negative and Gram-positive bacteria or the aseptic injection control. In-line with these results, RNAi-mediated silencing of irc2/bf inhibited phagocytosis of B. afzelii and C. albicans but not the other bacteria. Tissue expression profiles, specific responses to microbial challenges, and patterns of phagocytic phenotypes upon RNAi silencing observed for IrC2/Bf match well with the previously reported characteristics of I. ricinus C3-related molecule 1 (IrC3-1). Therefore we presume that IrC2/Bf functions as a convertase in the same complement activation pathway protecting ticks against yeast and Borrelia infection.
- MeSH
- aktivace komplementu MeSH
- Borrelia burgdorferi imunologie MeSH
- Candida albicans imunologie MeSH
- fagocytóza MeSH
- hemocyty imunologie mikrobiologie MeSH
- hmyzí proteiny genetika metabolismus MeSH
- infekce přenášené vektorem MeSH
- interakce hostitele a patogenu MeSH
- kandidóza imunologie MeSH
- klíště imunologie MeSH
- komplement C3 genetika metabolismus MeSH
- lidé MeSH
- lymeská nemoc imunologie MeSH
- malá interferující RNA genetika MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The increasing use of neonicotinoids in systematic seed treatment to crops is a serious cause of pollution of water resources and environment. Consequently, food sources can get eventually contaminated. To this end, it is desirable to develop suitable and effective platforms in order to obtain low-cost and sensitive sensors for neonicotinoids detection. In this work, graphene oxide modified electrodes were used as highly efficient electrochemical sensors for detection of two common insecticides - thiamethoxam and imidacloprid. The proposed sensor responded linearly in the concentration range of 10-200µmolL(-1) for both analytes and the detection limits were determined as low as 8.3µmolL(-1) and 7.9µmolL(-1) for thiamethoxam and imidacloprid, respectively. Analytical performance was also evaluated on spiked water and honey samples.
- MeSH
- analýza potravin ekonomika metody MeSH
- biosenzitivní techniky ekonomika metody MeSH
- chemické látky znečišťující vodu analýza MeSH
- dusíkaté sloučeniny analýza MeSH
- elektrochemické techniky ekonomika metody MeSH
- elektrody MeSH
- grafit chemie MeSH
- imidazoly analýza MeSH
- insekticidy analýza MeSH
- kontaminace potravin analýza MeSH
- limita detekce MeSH
- med analýza MeSH
- monitorování životního prostředí ekonomika metody MeSH
- oxaziny analýza MeSH
- oxidy chemie MeSH
- řeky chemie MeSH
- thiazoly analýza MeSH
- Publikační typ
- časopisecké články MeSH
- hodnotící studie MeSH
The present concept of the transmission of Lyme disease from Borrelia-infected Ixodes sp. ticks to the naïve host assumes that a low number of spirochetes that manage to penetrate the midgut epithelium migrate through the hemocoel to the salivary glands and subsequently infect the host with the aid of immunomodulatory compounds present in tick saliva. Therefore, humoral and/or cellular immune reactions within the tick hemocoel may play an important role in tick competence to act as a vector for borreliosis. To test this hypothesis we have examined complement-like reactions in the hemolymph of the hard tick Ixodes ricinus against Borrelia afzelii (the most common vector and causative agent of Lyme disease in Europe). We demonstrate that I. ricinus hemolymph does not exhibit borreliacidal effects comparable to complement-mediated lysis of bovine sera. However, after injection of B. afzelii into the tick hemocoel, the spirochetes were efficiently phagocytosed by tick hemocytes and this cellular defense was completely eliminated by pre-injection of latex beads. As tick thioester-containing proteins (T-TEPs) are components of the tick complement system, we performed RNAi-mediated silencing of all nine genes encoding individual T-TEPs followed by in vitro phagocytosis assays. Silencing of two molecules related to the C3 complement component (IrC3-2 and IrC3-3) significantly suppressed phagocytosis of B. afzelii, while knockdown of IrTep (insect type TEP) led to its stimulation. However, RNAi-mediated silencing of T-TEPs or elimination of phagocytosis by injection of latex beads in B. afzelii-infected I. ricinus nymphs had no obvious impact on the transmission of spirochetes to naïve mice, as determined by B. afzelii infection of murine tissues following tick infestation. This result supports the concept that Borrelia spirochetes are capable of avoiding complement-related reactions within the hemocoel of ticks competent to transmit Lyme disease.
- MeSH
- arachnida jako vektory imunologie mikrobiologie MeSH
- Borrelia burgdorferi komplex imunologie MeSH
- fagocytóza * MeSH
- hemocyty imunologie MeSH
- klíště imunologie mikrobiologie MeSH
- komplement metabolismus MeSH
- lymeská nemoc přenos MeSH
- modely nemocí na zvířatech MeSH
- myši MeSH
- přenos infekční nemoci MeSH
- proteiny členovců metabolismus MeSH
- zvířata MeSH
- Check Tag
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Adult reproductive diapause is characterized by lower behavioral activity, ceased reproduction and absence of juvenile hormone (JH). The role of JH receptor Methoprene-tolerant (Met) in female reproduction is well established; however, its function in male reproductive development and behavior is unclear. In the bean bug, Riptortus pedestris, circadian genes are essential for mediating photoperiodically-dependent growth of the male accessory glands (MAGs). The present study explores the role of circadian genes and JH receptor in male diapause in the linden bug, Pyrrhocoris apterus. These data indicate that circadian factors Clock, Cycle and Cry2 are responsible for photoperiod measurement, whereas Met and its partner protein Taiman participate in JH reception. Surprisingly, knockdown of the JH receptor neither lowered locomotor activity nor reduced mating behavior of males. These data suggest existence of a parallel, JH-independent or JH-upstream photoperiodic regulation of reproductive behavior.
- MeSH
- fotoperioda * MeSH
- Heteroptera růst a vývoj fyziologie MeSH
- juvenilní hormony metabolismus MeSH
- lokomoce MeSH
- methopren metabolismus MeSH
- sexuální chování zvířat MeSH
- signální transdukce * MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The ability of ticks to act as vectors for a wide range of serious human and animal infectious diseases is apparently linked to the insufficiency of the tick immune system to effectively eliminate pathogens they transmit. At the tick-pathogen interface, an important role is presumably played by components of an ancient complement system that includes a repertoire of thioester-containing proteins (TEPs), which in Ixodes sp. comprises three α2-macroglobulins (A2M), three C3 complement component-related molecules (C3), two macroglobulin complement-related (Mcr) and one insect-type TEPs (Tep). In order to assess the function of TEPs in tick immunity, a quantitative real-time PCR expression analysis of tick TEPs was performed at various developmental stages of Ixodes ricinus, and in tissues dissected from adult females. Expression of TEP genes was mostly tissue specific; IrA2M1, IrC3-1, IrC3-3 were found to be expressed in cells of tick fat body adjacent to the tracheal trunks, IrA2M2 in hemocytes, IrTep in ovaries, IrMcr1 in salivary glands and only IrA2M3, IrC3-2 and IrMcr2 mRNAs were present in multiple organs. Expression of tick TEPs was further examined in response to injection of model microbes representing Gram-negative, Gram-positive bacteria and yeast. The greatest expression induction was observed for IrA2M1 and IrC3-1 after challenge with the yeast Candida albicans. Phagocytosis of the yeast was strongly dependent on an active thioester bond and the subsequent silencing of individual tick TEPs by RNA interference demonstrated the involvement of IrC3-1 and IrMcr2. This result suggests the existence of a distinct complement-like pathway, different from that leading to phagocytosis of Gram-negative bacteria. Understanding of the tick immune response against model microbes should provide new concepts for investigating interactions between ticks and relevant tick-borne pathogens.
- MeSH
- Candida albicans imunologie MeSH
- fagocytóza imunologie MeSH
- gramnegativní bakterie imunologie MeSH
- grampozitivní bakterie imunologie MeSH
- hemolymfa imunologie MeSH
- klíště genetika imunologie MeSH
- malá interferující RNA MeSH
- proteiny členovců biosyntéza genetika imunologie MeSH
- RNA interference MeSH
- zvířata MeSH
- Check Tag
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
