LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 41

Search options

  1. Article ; Online: Targeting the Human Influenza a Virus: The Methods, Limitations, and Pitfalls of Virtual Screening for Drug-like Candidates Including Scaffold Hopping and Compound Profiling.

    Scior, Thomas / Cuanalo-Contreras, Karina / Islas, Angel A / Martinez-Laguna, Ygnacio

    Viruses

    2023  Volume 15, Issue 5

    Abstract: In this study, we describe the input data and processing steps to find antiviral lead compounds by a virtual screen. Two-dimensional and three-dimensional filters were designed based on the X-ray crystallographic structures of viral neuraminidase co- ... ...

    Abstract In this study, we describe the input data and processing steps to find antiviral lead compounds by a virtual screen. Two-dimensional and three-dimensional filters were designed based on the X-ray crystallographic structures of viral neuraminidase co-crystallized with substrate sialic acid, substrate-like DANA, and four inhibitors (oseltamivir, zanamivir, laninamivir, and peramivir). As a result, ligand-receptor interactions were modeled, and those necessary for binding were utilized as screen filters. Prospective virtual screening (VS) was carried out in a virtual chemical library of over half a million small organic substances. Orderly filtered moieties were investigated based on 2D- and 3D-predicted binding fingerprints disregarding the "rule-of-five" for drug likeness, and followed by docking and ADMET profiling. Two-dimensional and three-dimensional screening were supervised after enriching the dataset with known reference drugs and decoys. All 2D, 3D, and 4D procedures were calibrated before execution, and were then validated. Presently, two top-ranked substances underwent successful patent filing. In addition, the study demonstrates how to work around reported VS pitfalls in detail.
    MeSH term(s) Humans ; Enzyme Inhibitors/pharmacology ; Prospective Studies ; Zanamivir/pharmacology ; Antiviral Agents/therapeutic use ; Influenza A virus/metabolism ; Neuraminidase/metabolism ; Influenza, Human/drug therapy ; Influenza, Human/prevention & control
    Chemical Substances Enzyme Inhibitors ; Zanamivir (L6O3XI777I) ; Antiviral Agents ; Neuraminidase (EC 3.2.1.18)
    Language English
    Publishing date 2023-04-26
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v15051056
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: GrlR, a negative regulator in enteropathogenic

    Lara-Ochoa, Cristina / Huerta-Saquero, Alejandro / Medrano-López, Abraham / Deng, Wanyin / Finlay, B Brett / Martínez-Laguna, Ygnacio / Puente, José L

    Frontiers in microbiology

    2023  Volume 14, Page(s) 1063368

    Abstract: Introduction: Enteropathogenic : Methods: To further explore the role that GrlR and GrlA in the regulation of the LEE, we used different EPEC regulatory mutants and : Results and discussion: We showed that the transcriptional activity of LEE ... ...

    Abstract Introduction: Enteropathogenic
    Methods: To further explore the role that GrlR and GrlA in the regulation of the LEE, we used different EPEC regulatory mutants and
    Results and discussion: We showed that the transcriptional activity of LEE operons increased under LEE-repressing growth conditions in the absence of GrlR. Interestingly, GrlR overexpression exerted a strong repression effect over LEE genes in wild-type EPEC and, unexpectedly, even in the absence of H-NS, suggesting that GrlR plays an alternative repressor role. Moreover, GrlR repressed the expression of LEE promoters in a non-EPEC background. Experiments with single and double mutants showed that GrlR and H-NS negatively regulate the expression of LEE operons at two cooperative yet independent levels. In addition to the notion that GrlR acts as a repressor by inactivating GrlA through protein-protein interactions, here we showed that a DNA-binding defective GrlA mutant that still interacts with GrlR prevented GrlR-mediated repression, suggesting that GrlA has a dual role as a positive regulator by antagonizing GrlR's alternative repressor role. In line with the importance of the GrlR-GrlA complex in modulating LEE gene expression, we showed that GrlR and GrlA are expressed and interact under both inducing and repressing conditions. Further studies will be required to determine whether the GrlR alternative repressor function depends on its interaction with DNA, RNA, or another protein. These findings provide insight into an alternative regulatory pathway that GrlR employs to function as a negative regulator of LEE genes.
    Language English
    Publishing date 2023-02-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2023.1063368
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: The nucleoid protein HU positively regulates the expression of type VI secretion systems in

    Hernández-Martínez, Gabriela / Ares, Miguel A / Rosales-Reyes, Roberto / Soria-Bustos, Jorge / Yañez-Santos, Jorge Antonio / Cedillo, María L / Girón, Jorge A / Martínez-Laguna, Ygnacio / Leng, Fenfei / Ibarra, J Antonio / De la Cruz, Miguel A

    mSphere

    2024  , Page(s) e0006024

    Abstract: Enterobacter cloacae: Importance: T6SS is a nanomachine that functions as a weapon of bacterial destruction crucial for successful colonization in a specific niche. ...

    Abstract Enterobacter cloacae
    Importance: T6SS is a nanomachine that functions as a weapon of bacterial destruction crucial for successful colonization in a specific niche.
    Language English
    Publishing date 2024-04-22
    Publishing country United States
    Document type Journal Article
    ISSN 2379-5042
    ISSN (online) 2379-5042
    DOI 10.1128/msphere.00060-24
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: Antimicrobial resistance in food-associated

    Babines-Orozco, Lorena / Balbuena-Alonso, María Guadalupe / Barrios-Villa, Edwin / Lozano-Zarain, Patricia / Martínez-Laguna, Ygnacio / Del Carmen Rocha-Gracia, Rosa / Cortés-Cortés, Gerardo

    Bioscience of microbiota, food and health

    2023  Volume 43, Issue 1, Page(s) 4–12

    Abstract: The World Health Organization (WHO) considers antimicrobial resistance to be one of the critical global public health priorities to address. ...

    Abstract The World Health Organization (WHO) considers antimicrobial resistance to be one of the critical global public health priorities to address.
    Language English
    Publishing date 2023-06-29
    Publishing country Japan
    Document type Journal Article ; Review
    ISSN 2186-6953
    ISSN 2186-6953
    DOI 10.12938/bmfh.2023-022
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: The Enolase of the

    Osorio-Aguilar, Yesenia / Gonzalez-Vazquez, Maria Cristina / Lozano-Zarain, Patricia / Martinez-Laguna, Ygnacio / Baylon-Pacheco, Lidia / Rosales-Encina, Jose Luis / Carabarin-Lima, Alejandro / Rocha-Gracia, Rosa Del Carmen

    International journal of molecular sciences

    2023  Volume 24, Issue 21

    Abstract: Enolase proteins play a significant role as moonlighting proteins. In their role as surface-associated enolase, they have multiple functions as they interact with extracellular matrix proteins. Type I and III collagens are the major constituents of this ... ...

    Abstract Enolase proteins play a significant role as moonlighting proteins. In their role as surface-associated enolase, they have multiple functions as they interact with extracellular matrix proteins. Type I and III collagens are the major constituents of this extracellular matrix, and collagen is one of the targets of interaction with the enolase of many pathogens, thereby helping the colonization process and promoting the subsequent invasion of the host. This work aimed to determine the participation of non-typeable
    MeSH term(s) Humans ; Haemophilus influenzae ; Haemophilus Infections ; Phosphopyruvate Hydratase/genetics ; Collagen Type I ; Molecular Docking Simulation ; Collagen/metabolism ; Extracellular Matrix/metabolism
    Chemical Substances Phosphopyruvate Hydratase (EC 4.2.1.11) ; Collagen Type I ; Collagen (9007-34-5)
    Language English
    Publishing date 2023-10-24
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms242115499
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Interaction between a Novel Oligopeptide Fragment of the Human Neurotrophin Receptor TrkB Ectodomain D5 and the C-Terminal Fragment of Tetanus Neurotoxin.

    Candalija, Ana / Scior, Thomas / Rackwitz, Hans-Richard / Ruiz-Castelan, Jordan E / Martinez-Laguna, Ygnacio / Aguilera, José

    Molecules (Basel, Switzerland)

    2021  Volume 26, Issue 13

    Abstract: This article presents experimental evidence and computed molecular models of a potential interaction between receptor domain D5 of TrkB with the carboxyl-terminal domain of tetanus neurotoxin (Hc-TeNT). Computational simulations of a novel small cyclic ... ...

    Abstract This article presents experimental evidence and computed molecular models of a potential interaction between receptor domain D5 of TrkB with the carboxyl-terminal domain of tetanus neurotoxin (Hc-TeNT). Computational simulations of a novel small cyclic oligopeptide are designed, synthesized, and tested for possible tetanus neurotoxin-D5 interaction. A hot spot of this protein-protein interaction is identified in analogy to the hitherto known crystal structures of the complex between neurotrophin and D5. Hc-TeNT activates the neurotrophin receptors, as well as its downstream signaling pathways, inducing neuroprotection in different stress cellular models. Based on these premises, we propose the Trk receptor family as potential proteic affinity receptors for TeNT. In vitro, Hc-TeNT binds to a synthetic TrkB-derived peptide and acts similar to an agonist ligand for TrkB, resulting in phosphorylation of the receptor. These properties are weakened by the mutagenesis of three residues of the predicted interaction region in Hc-TeNT. It also competes with Brain-derived neurotrophic factor, a native binder to human TrkB, for the binding to neural membranes, and for uptake in TrkB-positive vesicles. In addition, both molecules are located together In Vivo at neuromuscular junctions and in motor neurons.
    MeSH term(s) Animals ; Crystallography, X-Ray ; Humans ; Membrane Glycoproteins/chemistry ; Membrane Glycoproteins/metabolism ; Membrane Glycoproteins/pharmacology ; Metalloendopeptidases/chemistry ; Metalloendopeptidases/metabolism ; Metalloendopeptidases/pharmacology ; Neuroprotective Agents/chemistry ; Neuroprotective Agents/metabolism ; Neuroprotective Agents/pharmacology ; Oligopeptides/chemistry ; Oligopeptides/metabolism ; Oligopeptides/pharmacology ; Protein Domains ; Rats ; Rats, Sprague-Dawley ; Receptor, trkB/chemistry ; Receptor, trkB/metabolism ; Receptor, trkB/pharmacology ; Tetanus Toxin/chemistry ; Tetanus Toxin/metabolism ; Tetanus Toxin/pharmacology
    Chemical Substances Membrane Glycoproteins ; Neuroprotective Agents ; Oligopeptides ; Tetanus Toxin ; tetanospasmin (11032-48-7) ; Receptor, trkB (EC 2.7.10.1) ; tropomyosin-related kinase-B, human (EC 2.7.10.1) ; Metalloendopeptidases (EC 3.4.24.-)
    Language English
    Publishing date 2021-06-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules26133988
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: Epigenetic mechanisms of particulate matter exposure: air pollution and hazards on human health.

    Gavito-Covarrubias, Dulcemaría / Ramírez-Díaz, Ivonne / Guzmán-Linares, Josué / Limón, Ilhuicamina Daniel / Manuel-Sánchez, Dulce María / Molina-Herrera, Alejandro / Coral-García, Miguel Ángel / Anastasio, Estela / Anaya-Hernández, Arely / López-Salazar, Primavera / Juárez-Díaz, Gabriel / Martínez-Juárez, Javier / Torres-Jácome, Julián / Albarado-Ibáñez, Alondra / Martínez-Laguna, Ygnacio / Morán, Carolina / Rubio, Karla

    Frontiers in genetics

    2024  Volume 14, Page(s) 1306600

    Abstract: Environmental pollution nowadays has not only a direct correlation with human health changes but a direct social impact. Epidemiological studies have evidenced the increased damage to human health on a daily basis because of damage to the ecological ... ...

    Abstract Environmental pollution nowadays has not only a direct correlation with human health changes but a direct social impact. Epidemiological studies have evidenced the increased damage to human health on a daily basis because of damage to the ecological niche. Rapid urban growth and industrialized societies importantly compromise air quality, which can be assessed by a notable accumulation of air pollutants in both the gas and the particle phases. Of them, particulate matter (PM) represents a highly complex mixture of organic and inorganic compounds of the most variable size, composition, and origin. PM being one of the most complex environmental pollutants, its accumulation also varies in a temporal and spatial manner, which challenges current analytical techniques used to investigate PM interactions. Nevertheless, the characterization of the chemical composition of PM is a reliable indicator of the composition of the atmosphere, the quality of breathed air in urbanized societies, industrial zones and consequently gives support for pertinent measures to avoid serious health damage. Epigenomic damage is one of the most promising biological mechanisms of air pollution-derived carcinogenesis. Therefore, this review aims to highlight the implication of PM exposure in diverse molecular mechanisms driving human diseases by altered epigenetic regulation. The presented findings in the context of pan-organic cancer, fibrosis, neurodegeneration and metabolic diseases may provide valuable insights into the toxicity effects of PM components at the epigenomic level and may serve as biomarkers of early detection for novel targeted therapies.
    Language English
    Publishing date 2024-01-17
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2606823-0
    ISSN 1664-8021
    ISSN 1664-8021
    DOI 10.3389/fgene.2023.1306600
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article: The Transcription of Flagella of Enteropathogenic

    Avelino-Flores, Fabiola / Soria-Bustos, Jorge / Saldaña-Ahuactzi, Zeus / Martínez-Laguna, Ygnacio / Yañez-Santos, Jorge A / Cedillo-Ramírez, María L / Girón, Jorge A

    Microorganisms

    2022  Volume 10, Issue 4

    Abstract: The flagella of ... ...

    Abstract The flagella of enteropathogenic
    Language English
    Publishing date 2022-04-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms10040792
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: The Fis Nucleoid Protein Negatively Regulates the Phase Variation

    Saldaña-Ahuactzi, Zeus / Soria-Bustos, Jorge / Martínez-Santos, Verónica I / Yañez-Santos, Jorge A / Martínez-Laguna, Ygnacio / Cedillo-Ramirez, María Lilia / Puente, José L / Girón, Jorge A

    Frontiers in microbiology

    2022  Volume 13, Page(s) 882563

    Abstract: ... ...

    Abstract In
    Language English
    Publishing date 2022-04-28
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2022.882563
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Isolation and Identification of Two Brucella Species from a Volcanic Lake in Mexico.

    Ramos-Ramírez, Lesset Del Consuelo / Saldaña-Ahuactzi, Zeus / Morales-Lara, Laura / Martínez-Laguna, Ygnacio / Castañeda-Roldán, Elsa Iracena

    Current microbiology

    2020  Volume 77, Issue 11, Page(s) 3565–3572

    Abstract: Brucellosis is a zoonosis caused by bacteria of the Brucella genus. Any source of contamination that could be infectious must be monitored to reduce the risk of exposure to brucellosis, so the purpose of this work was to determine the presence of ... ...

    Abstract Brucellosis is a zoonosis caused by bacteria of the Brucella genus. Any source of contamination that could be infectious must be monitored to reduce the risk of exposure to brucellosis, so the purpose of this work was to determine the presence of Brucella spp. on surface water and tilapia (Oreochromis niloticus) skin from a volcanic lake in Mexico. A seasonal sampling during 2016-2017 was carried out at fifteen specific sites for water sampling and five sites for the collection of tilapia fish. From all water and fish samples tested, we found only three isolates of Brucella species. We isolated and identified B. abortus from surface water through bacteriological and molecular techniques, and B. abortus and B. suis from the same tilapia skin sample. The isolated strains likely came from breeding animals that are common to the region, such as infected pigs or cattle with Brucella abortus or B. suis, respectively. A similar finding has not been reported in a water from volcanic lake or tilapia fish in Mexico. We concluded that B. abortus and B. suis are present on the surface water of the volcanic lake and tilapia skin as possible contaminants derived from biological material from cows and pigs carrying this bacterium.
    MeSH term(s) Animals ; Brucella abortus ; Brucellosis/veterinary ; Cattle ; Female ; Lakes ; Mexico ; Swine
    Language English
    Publishing date 2020-09-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 134238-1
    ISSN 1432-0991 ; 0343-8651
    ISSN (online) 1432-0991
    ISSN 0343-8651
    DOI 10.1007/s00284-020-02184-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top