Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) main protease (Mpro) autocatalytically releases itself out of the viral polyprotein to form a fully active mature dimer in a manner that is not fully understood. Here, we introduce several tools to help elucidate differences between cis (intramolecular) and trans (intermolecular) proteolytic processing and to evaluate inhibition of precursor Mpro. We found that many mutations at the P1 position of the N-terminal autoprocessing site do not block cis autoprocessing but do inhibit trans processing. Notably, substituting the WT glutamine at the P1 position with isoleucine retains Mpro in an unprocessed precursor form that can be purified and further studied. We also developed a cell-based reporter assay suitable for compound library screening and evaluation in HEK293T cells. This assay can detect both overall Mpro inhibition and the fraction of uncleaved precursor form of Mpro through separable fluorescent signals. We observed that inhibitory compounds preferentially block mature Mpro. Bofutrelvir and a novel compound designed in-house showed the lowest selectivity between precursor and mature Mpro, indicating that inhibition of both forms may be possible. Additionally, we observed positive modulation of precursor activity at low concentrations of inhibitors. Our findings help expand understanding of the SARS-CoV-2 viral life cycle and may facilitate development of strategies to target precursor form of Mpro for inhibition or premature activation of Mpro.
- MeSH
- antivirové látky * farmakologie chemie MeSH
- farmakoterapie COVID-19 MeSH
- HEK293 buňky MeSH
- inhibitory proteas farmakologie chemie MeSH
- koronavirové proteasy 3C * metabolismus antagonisté a inhibitory chemie genetika MeSH
- lidé MeSH
- mutace MeSH
- objevování léků * metody MeSH
- proteolýza MeSH
- SARS-CoV-2 * enzymologie účinky léků metabolismus genetika MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Herein, we investigated the anti-amoebic activity of phosphonium-chloride-based deep eutectic solvents against pathogenic Acanthamoeba castellanii of the T4 genotype. Deep eutectic solvents are ionic fluids composed of two or three substances, capable of self-association to form a eutectic mixture with a melting point lower than each substance. In this study, three distinct hydrophobic deep eutectic solvents were formulated, employing trihexyltetradecylphosphonium chloride as the hydrogen bond acceptor and aspirin, dodecanoic acid, and 4-tert-butylbenzoic acid as the hydrogen bond donors. Subsequently, all three deep eutectic solvents, denoted as DES1, DES2, DES3 formulations, underwent investigations comprising amoebicidal, adhesion, excystation, cytotoxicity, and cytopathogenicity assays. The findings revealed that DES2 was the most potent anti-amoebic agent, with a 94% elimination rate against the amoebae within 24 h at 30 °C. Adhesion assays revealed that deep eutectic solvents hindered amoebae adhesion to human brain endothelial cells, with DES2 exhibiting 88% reduction of adhesion. Notably, DES3 exhibited remarkable anti-excystation properties, preventing 94% of cysts from reverting to trophozoites. In cytopathogenicity experiments, deep eutectic solvent formulations and dodecanoic acid alone reduced amoebae-induced human brain endothelial cell death, with DES2 showing the highest effects. Lactate dehydrogenase assays revealed the minimal cytotoxicity of the tested deep eutectic solvents, with the exception of trihexyltetradecylphosphonium chloride, which exhibited 35% endothelial cell damage. These findings underscore the potential of specific deep eutectic solvents in combating pathogenic Acanthamoeba, presenting promising avenues for further research and development against free-living amoebae.
- MeSH
- Acanthamoeba castellanii * účinky léků genetika MeSH
- amébicidy farmakologie chemie MeSH
- buněčná adheze účinky léků MeSH
- endoteliální buňky účinky léků MeSH
- genotyp * MeSH
- lidé MeSH
- organofosforové sloučeniny farmakologie chemie MeSH
- rozpouštědla * chemie farmakologie MeSH
- trofozoiti účinky léků MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- Klíčová slova
- projekt Betty, projekt ČENDA,
- MeSH
- autoprotilátky MeSH
- beta-buňky MeSH
- diabetes mellitus 1. typu * prevence a kontrola MeSH
- dítě MeSH
- lidé MeSH
- screeningové diagnostické programy * MeSH
- výchova a vzdělávání MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
Virové bradavice jsou celosvětově časté onemocnění způsobené lidským papilomavirem, který má řadu genotypů. Mnoho z těchto virů je komenzálních a u imunokompetentních hostitelů nevyvolávají žádné projevy. Za vhodných podmínek některé způsobují klinické změny na kůži nebo na sliznicích v anogenitální či orofaryngeální oblasti. U dětí se nejčastěji setkáváme s verruca vulgaris, verruca plantaris a verruca plana. Řada těchto projevů samovolně vymizí, problémem jsou perzistentní či úporně recidivující bradavice. Léčbou se snažíme nejen zlikvidovat viditelné změny za minimalizace bolesti a bez jizvení, ale také o prevenci recidivy ať již v místě původní bradavice nebo kdekoli jinde na těle.
Viral warts are a common disease worldwide caused by the human papillomavirus, which has a number of genotypes. Many of these viruses are commensal and do not cause any symptoms in immunocompetent hosts. Under appropriate conditions, however, some cause clinical changes on the skin or mucous membranes in the anogenital or oropharyngeal part. Verruca vulgaris, verruca plantaris and verruca plana are most often encountered in children. Many of these manifestations disappear on their own, the problem is persistent or stubbornly recurring warts. With the treatment, we try not only to eliminate visible changes while minimizing pain and without scarring, but also to prevent recurrence, whether at the site of the original wart or anywhere else on the body.
- MeSH
- bradavice * farmakoterapie terapie MeSH
- dítě * MeSH
- fluoruracil farmakologie terapeutické užití MeSH
- infekce papilomavirem přenos terapie MeSH
- keratinocyty patologie MeSH
- kryoterapie metody MeSH
- kyselina salicylová terapeutické užití MeSH
- kyselina trichloroctová terapeutické užití MeSH
- lasery MeSH
- lidé MeSH
- podofylin farmakologie terapeutické užití MeSH
- Check Tag
- dítě * MeSH
- lidé MeSH
Infectious diseases, including bacterial, fungal, and viral, have once again gained urgency in the drug development pipeline after the recent COVID-19 pandemic. Tuberculosis (TB) is an old infectious disease for which eradication has not yet been successful. Novel agents are required to have potential activity against both drug-sensitive and drug-resistant strains of Mycobacterium tuberculosis (Mtb), the causative agent of TB. In this study, we present a series of 2-phenyl-N-(pyridin-2-yl)acetamides in an attempt to investigate their possible antimycobacterial activity, cytotoxicity on the HepG2 liver cancer cell line, and-as complementary testing-their antibacterial and antifungal properties against a panel of clinically important pathogens. This screening resulted in one compound with promising antimycobacterial activity-compound 12, MICMtb H37Ra = 15.625 μg/mL (56.26 μM). Compounds 17, 24, and 26 were further screened for their antiproliferative activity against human epithelial kidney cancer cell line A498, human prostate cancer cell line PC-3, and human glioblastoma cell line U-87MG, where they were found to possess interesting activity worth further exploration in the future.
- MeSH
- acetamidy * chemie farmakologie MeSH
- antifungální látky farmakologie chemie chemická syntéza MeSH
- antituberkulotika farmakologie chemie MeSH
- buňky Hep G2 MeSH
- lidé MeSH
- mikrobiální testy citlivosti * MeSH
- Mycobacterium tuberculosis * účinky léků MeSH
- nádorové buněčné linie MeSH
- proliferace buněk * účinky léků MeSH
- protinádorové látky farmakologie chemie MeSH
- pyridiny chemie farmakologie MeSH
- SARS-CoV-2 účinky léků MeSH
- vztahy mezi strukturou a aktivitou MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
The objective of our in vitro study was to quantify the biochemical profile where the total polyphenol, flavonoid and phenolic acid content was determined. The antioxidant potential of microgreen extract from Trigonella foenum-graecum L., was measured molybdenum reducing power assay. Specifically, the study assessed parameters such as metabolic activity (AlamarBlueTM assay), membrane integrity (CFDA-AM assay), mitochondrial potential (JC-1 assay), as well as reactive oxygen species generation (NBT assay). In addition, the steroid hormone release in TM3 murine Leydig cells after 12 h and 24 h exposures were quantified by enzyme-linked immunosorbent assay. The gained results indicate the highest value in total flavonoid content (182.59+/-2.13 mg QE) determination, supported by a significant (108.25+/-1.27 mg TE) antioxidant activity. The effects on metabolic activity, cell membrane integrity, and mitochondrial membrane potential were found to be both time- and dose-dependent. Notably, a significant suppression in reactive oxygen species generation was confirmed at 150, 200 and 250 microg/ml after 24 h exposure. In addition, progesterone and testosterone release was stimulated up to 250 microg/ml dose of Trigonella, followed by a decline in both steroid production at 300 and 1000 microg/ml. Our results indicate, that Trigonella at lower experimental doses (up to 250 microg/ml) may positively affect majority of monitored cell parameters in TM3 Leydig cells. Overleaf, increasing experimental doses may negatively affect the intracellular parameters already after 12 h of in vitro exposure. Key words Microgreens, Trigonella foenum-graecum L., Fenugreek, Leydig cells, Male reproduction.
- MeSH
- antioxidancia farmakologie MeSH
- buněčné linie MeSH
- fytonutrienty farmakologie MeSH
- Leydigovy buňky * účinky léků metabolismus MeSH
- membránový potenciál mitochondrií účinky léků MeSH
- myši MeSH
- reaktivní formy kyslíku metabolismus MeSH
- rostlinné extrakty * farmakologie MeSH
- testosteron metabolismus MeSH
- Trigonella * chemie MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Waterpipe smoking (WPS) has adverse health effects that include endothelial dysfunction with mechanisms involving oxidative stress and inflammation. Nonetheless, there is a scarcity of data on the direct impact of WPS on endothelial function. In this study, we assessed the in vitro effects of waterpipe smoke extract (WPSE) on aortic endothelial cell lines, namely the TeloHAEC. The WPSE markedly caused concentration- and time-dependent decreases in cellular viability. When compared with the control, at a concentration of 20 % and an incubation period of 48 h, the WPSE significantly increased the levels of lactate dehydrogenase, and markers of oxidative stress including thiobarbituric acid reactive substances, superoxide dismutase, catalase, and reduced glutathione. Moreover, the concentrations of proinflammatory cytokine (tumor necrosis factor alpha), and adhesion molecules (E-selectin and intercellular adhesion molecule-1) were also significantly augmented. Likewise, WPSE triggered mitochondrial dysfunction, DNA oxidative damage, as well as apoptosis in TeloHAEC cells. Similarly, cells cultured with WPSE have shown increased expression of phosphorylated nuclear factor-kappaB and hypoxia-inducible factor 1-alpha (HIF-1alpha). In conclusion, our study showed that WPSE triggers endothelial inflammation, oxidative stress, DNA damage, mitochondrial dysfunction, and apoptosis via mechanisms involving the activation of nuclear factor-kappaB and HIF-1alpha. Key words Waterpipe smoking, Aortic endothelial cells, Inflammation, Oxidative Stress.
- MeSH
- aorta * účinky léků metabolismus MeSH
- apoptóza účinky léků MeSH
- buněčné linie MeSH
- endoteliální buňky * účinky léků metabolismus MeSH
- kouř * škodlivé účinky MeSH
- kouření vodní dýmky * škodlivé účinky metabolismus MeSH
- lidé MeSH
- oxidační stres * účinky léků MeSH
- poškození DNA účinky léků MeSH
- viabilita buněk účinky léků MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Polycystic ovary syndrome (PCOS) is a common endocrine disorder affecting women of reproductive age, characterized by a spectrum of reproductive, endocrine, and metabolic disturbances. The etiology of PCOS encompasses a complex interplay of genetic, metabolic, inflammatory, and oxidative factors, though the precise pathological mechanisms remain inadequately understood. Despite considerable variability in the clinical characteristics and biochemical profiles among individuals with PCOS, abnormalities in follicular development are a hallmark of the condition. Granulosa cells, integral to follicular development, play a pivotal role in follicle maturation. Recent studies have established a strong correlation between granulosa cell programmed cell death and follicular atresia in PCOS. This review provides a comprehensive analysis of the current understanding of granulosa cell programmed cell death and its contribution to follicular atresia within the pathophysiology of PCOS, providing a foundation for future research endeavors. Key words Follicular atresia, Hyperandrogenism, Insulin resistance, Polycystic ovary syndrome, Programmed cell death of granulosa cells.
- MeSH
- apoptóza * MeSH
- folikulární atrézie * metabolismus MeSH
- folikulární buňky * metabolismus patologie MeSH
- lidé MeSH
- ovariální folikul metabolismus patologie MeSH
- syndrom polycystických ovarií * patologie metabolismus MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
Virové bradavice jsou celosvětově časté onemocnění způsobené lidským papilomavirem, který má řadu genotypů. Mnoho z těchto virů je komenzálních a u imunokompetentních hostitelů nevyvolávají žádné projevy. Za vhodných podmínek některé způsobují klinické změny na kůži nebo na sliznicích v anogenitální či orofaryngeální oblasti. U dětí se nejčastěji setkáváme s verruca vulgaris, verruca plantaris a verruca plana. Řada těchto projevů samovolně vymizí, problémem jsou perzistentní či úporně recidivující bradavice. Léčbou se snažíme nejen zlikvidovat viditelné změny za minimalizace bolesti a bez jizvení, ale také o prevenci recidivy ať již v místě původní bradavice nebo kdekoli jinde na těle.
Viral warts are a common disease worldwide caused by the human papillomavirus, which has a number of genotypes. Many of these viruses are commensal and do not cause any symptoms in immunocompetent hosts. Under appropriate conditions, however, some cause clinical changes on the skin or mucous membranes in the anogenital or oropharyngeal part. Verruca vulgaris, verruca plantaris and verruca plana are most often encountered in children. Many of these manifestations disappear on their own, the problem is persistent or stubbornly recurring warts. With the treatment, we try not only to eliminate visible changes while minimizing pain and without scarring, but also to prevent recurrence, whether at the site of the original wart or anywhere else on the body.
- MeSH
- bradavice * terapie MeSH
- dítě * MeSH
- imunoterapie metody MeSH
- infekce papilomavirem farmakoterapie terapie MeSH
- keratinocyty účinky léků MeSH
- kryoterapie metody MeSH
- kyselina salicylová farmakologie terapeutické užití MeSH
- lasery MeSH
- lidé MeSH
- retinoidy farmakologie terapeutické užití MeSH
- Check Tag
- dítě * MeSH
- lidé MeSH
The precise and unambiguous detection and quantification of internal RNA modifications represents a critical step for understanding their physiological functions. The methods of direct RNA sequencing are quickly developing allowing for the precise location of internal RNA marks. This detection is, however, not quantitative and still presents detection limits. One of the biggest remaining challenges in the field is still the detection and quantification of m6A, m6Am, inosine, and m1A modifications of adenosine. The second intriguing and timely question remaining to be addressed is the extent to which individual marks are coregulated or potentially can affect each other. Here, we present a methodological approach to detect and quantify several key mRNA modifications in human total RNA and in mRNA, which is difficult to purify away from contaminating tRNA. We show that the adenosine demethylase FTO primarily targets m6Am marks in noncoding RNAs in HEK293T cells. Surprisingly, we observe little effect of FTO or ALKBH5 depletion on the m6A mRNA levels. Interestingly, the upregulation of ALKBH5 is accompanied by an increase in inosine level in overall mRNA.
- MeSH
- adenosin * analogy a deriváty metabolismus genetika analýza MeSH
- alfa-ketoglutarát-dependentní dioxygenasa, AlkB homolog 5 * metabolismus genetika MeSH
- chromatografie kapalinová metody MeSH
- gen pro FTO * metabolismus genetika MeSH
- HEK293 buňky MeSH
- inosin * metabolismus genetika MeSH
- kapalinová chromatografie-hmotnostní spektrometrie MeSH
- lidé MeSH
- messenger RNA * genetika metabolismus MeSH
- posttranskripční úpravy RNA MeSH
- tandemová hmotnostní spektrometrie * metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
