LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 44

Search options

  1. Article ; Online: Costunolide and Parthenolide Ameliorate MPP+ Induced Apoptosis in the Cellular Parkinson’s Disease Model

    Mehmet Enes Arslan / Hasan Türkez / Yasemin Sevim / Harun Selvitopi / Abdurrahim Kadi / Sena Öner / Adil Mardinoğlu

    Cells, Vol 12, Iss 992, p

    2023  Volume 992

    Abstract: Monoamine oxidase B (MAO-B) is an enzyme that metabolizes several chemicals, including dopamine. MAO-B inhibitors are used in the treatment of Parkinson’s Disease (PD), and the inhibition of this enzyme reduces dopamine turnover and oxidative stress. The ...

    Abstract Monoamine oxidase B (MAO-B) is an enzyme that metabolizes several chemicals, including dopamine. MAO-B inhibitors are used in the treatment of Parkinson’s Disease (PD), and the inhibition of this enzyme reduces dopamine turnover and oxidative stress. The absence of dopamine results in PD pathogenesis originating from decreased Acetylcholinesterase (AChE) activity and elevated oxidative stress. Here, we performed a molecular docking analysis for the potential use of costunolide and parthenolide terpenoids as potential MAO-B inhibitors in the treatment of PD. Neuroprotective properties of plant-originated costunolide and parthenolide terpenoids were investigated in a cellular PD model that was developed by using MPP + toxicity. We investigated neuroprotection mechanisms through the analysis of oxidative stress parameters, acetylcholinesterase activity and apoptotic cell death ratios. Our results showed that 100 µg/mL and 50 µg/mL of costunolide, and 50 µg/mL of parthenolide applied to the cellular disease model ameliorated the cytotoxicity caused by MPP + exposure. We found that acetylcholinesterase activity assays exhibited that terpenoids could ameliorate and restore the enzyme activity as in negative control levels. The oxidative stress parameter analyses revealed that terpenoid application could enhance antioxidant levels and decrease oxidative stress in the cultures. In conclusion, we reported that these two terpenoid molecules could be used in the development of efficient treatment strategies for PD patients.
    Keywords Parkinson’s disease ; terpenoids ; antioxidants ; acetylcholinesterase ; apoptosis ; Biology (General) ; QH301-705.5
    Subject code 500
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  2. Article ; Online: The Assessment of Selected miRNA Profile in Familial Mediterranean Fever

    Cigdem Yuce Kahraman / Mehmet Ertugrul Egin / Abdulgani Tatar / Hasan Turkez / Adil Mardinoglu

    BioMed Research International, Vol

    2021  Volume 2021

    Abstract: Familial Mediterranean fever (FMF) is the most prevalent autoinflammatory disease. Typical findings are recurrent fever attacks with serositis, skin rash, and synovitis. FMF is caused by mutations in the MEFV gene, encoding pyrin protein. Pyrin functions ...

    Abstract Familial Mediterranean fever (FMF) is the most prevalent autoinflammatory disease. Typical findings are recurrent fever attacks with serositis, skin rash, and synovitis. FMF is caused by mutations in the MEFV gene, encoding pyrin protein. Pyrin functions in innate immunity and triggers inflammation via inflammatory mediators’ production and acts as the primary regulatory component of the inflammasome. On the other hand, various miRNAs play crucial roles in the pathogenesis of different types of cancers and immune-related and neurodegenerative diseases. However, their association with FMF is still unclear. Therefore, in this study, we assessed the roles of selected thirteen miRNAs associated with immune functions. We recruited genetically diagnosed 28 FMF patients and 28 healthy individuals. The expression profiling of the miRNAs was determined by qRT-PCR and normalized to SNORD61. Our analysis revealed that miR-34a-5p, miR-142-3p, miR-216a-5p, miR-340-5p, miR-429, and miR-582-5p were upregulated, whereas miR-107, miR-569, and miR-1304-5p were downregulated in the FMF patients. Among them, miR-107 was found to be the most remarkable in M694V homozygous mutants compared to other homozygous mutants. During clinical follow-up of the patients with M694V mutation, which is closely related to amyloidosis, evaluation of mir-107 expression might be crucial and suggestive. Our results showed that miRNAs might serve a function in the pathogenesis of FMF. Further studies may provide novel and effective diagnostic and therapeutic agents that target examined miRNAs. Targeting miRNAs in FMF seems to be promising and may yield a new generation of rational therapeutics and diagnostic or monitoring tools enabling FMF treatment.
    Keywords Medicine ; R
    Subject code 500
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  3. Article ; Online: A Novel Mutation of ATP7B Gene in a Case of Wilson Disease

    Cigdem Yuce Kahraman / Ali Islek / Abdulgani Tatar / Özlem Özdemir / Adil Mardinglu / Hasan Turkez

    Medicina, Vol 57, Iss 123, p

    2021  Volume 123

    Abstract: Wilson disease (WD) (OMIM# 277900) is an autosomal recessive inherited disorder characterized by excess copper (Cu) storage in different human tissues, such as the brain, liver, and the corneas of the eyes. It is a rare disorder that occurs in ... ...

    Abstract Wilson disease (WD) (OMIM# 277900) is an autosomal recessive inherited disorder characterized by excess copper (Cu) storage in different human tissues, such as the brain, liver, and the corneas of the eyes. It is a rare disorder that occurs in approximately 1 in 30,000 individuals. The clinical presentations of WD are highly varied, primarily consisting of hepatic and neurological conditions. WD is caused by homozygous or compound heterozygous mutations in the ATP7B gene. The diagnosis of the disease is complicated because of its heterogeneous phenotypes. The molecular genetic analysis encourages early diagnosis, treatment, and the opportunity to screen individuals at risk in the family. In this paper, we reported a case with a novel, hotspot-located mutation in WD. We have suggested that this mutation in the ATP7B gene might contribute to liver findings, progressing to liver failure with a loss of function effect. Besides this, if patients have liver symptoms in childhood and/or are children of consanguineous parents, WD should be considered during the evaluation of the patients.
    Keywords novel mutation ; ATP7B ; Wilson disease ; rare disorder ; copper ; liver failure ; Medicine (General) ; R5-920
    Subject code 610
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  4. Article ; Online: Boron Nitride Nanoparticles Loaded with a Boron-Based Hybrid as a Promising Drug Carrier System for Alzheimer’s Disease Treatment

    Özge Çağlar Yıldırım / Mehmet Enes Arslan / Sena Öner / Ivana Cacciatore / Antonio Di Stefano / Adil Mardinoglu / Hasan Turkez

    International Journal of Molecular Sciences, Vol 23, Iss 15, p

    2022  Volume 8249

    Abstract: The search for an innovative and effective drug delivery system that can carry and release targeted drugs with enhanced activity to treat Alzheimer’s disease has received much attention in the last decade. In this study, we first designed a boron-based ... ...

    Abstract The search for an innovative and effective drug delivery system that can carry and release targeted drugs with enhanced activity to treat Alzheimer’s disease has received much attention in the last decade. In this study, we first designed a boron-based drug delivery system for effective treatment of AD by integrating the folic acid (FA) functional group into hexagonal boron nitride (hBN) nanoparticles (NPs) through an esterification reaction. The hBN-FA drug carrier system was assembled with a new drug candidate and a novel boron-based hybrid containing an antioxidant as BLA, to constitute a self-assembled AD nano transport system. We performed molecular characterization analyses by using UV-vis spectroscopy, Fourier transform infrared spectrophotometer (FTIR), scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDS) and Zeta potential investigations. Second, we tested the anti-Alzheimer properties of the carrier system on a differentiated neuroblastoma (SHSY5-Y) cell line, which was exposed to beta-amyloid (1–42) peptides to stimulate an experimental in vitro AD model. Next, we performed cytotoxicity analyses of synthesized molecules on the human dermal fibroblast cell line (HDFa) and the experimental AD model. Cytotoxicity analyses showed that even higher concentrations of the carrier system did not enhance the toxicological outcome in HDFa cells. Drug loading analyses reported that uncoated hBN nano conjugate could not load the BLA, whereas the memantine loading capacity of hBN was 84.3%. On the other hand, memantine and the BLA loading capacity of the hBN-FA construct was found to be 95% and 97.5%, respectively. Finally, we investigated the neuroprotective properties of the nano carrier systems in the experimental AD model. According to the results, 25 µg/mL concentrations of hBN-FA+memantine (94% cell viability) and hBN-FA+BLA (99% cell viability) showed ameliorative properties against beta-amyloid (1–42) peptide toxicity (50% cell viability). These results were generated through the ...
    Keywords hexagonal boron nitride ; folic acid ; boron lipoic acid ; Alzheimer’s disease ; experimental Alzheimer’s disease model ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 540
    Language English
    Publishing date 2022-07-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  5. Article ; Online: Applications of Genome-Wide Screening and Systems Biology Approaches in Drug Repositioning

    Elyas Mohammadi / Rui Benfeitas / Hasan Turkez / Jan Boren / Jens Nielsen / Mathias Uhlen / Adil Mardinoglu

    Cancers, Vol 12, Iss 2694, p

    2020  Volume 2694

    Abstract: Modern drug discovery through de novo drug discovery entails high financial costs, low success rates, and lengthy trial periods. Drug repositioning presents a suitable approach for overcoming these issues by re-evaluating biological targets and modes of ... ...

    Abstract Modern drug discovery through de novo drug discovery entails high financial costs, low success rates, and lengthy trial periods. Drug repositioning presents a suitable approach for overcoming these issues by re-evaluating biological targets and modes of action of approved drugs. Coupling high-throughput technologies with genome-wide essentiality screens, network analysis, genome-scale metabolic modeling, and machine learning techniques enables the proposal of new drug–target signatures and uncovers unanticipated modes of action for available drugs. Here, we discuss the current issues associated with drug repositioning in light of curated high-throughput multi-omic databases, genome-wide screening technologies, and their application in systems biology/medicine approaches.
    Keywords drug repositioning ; genomic screens ; machine learning ; systems pharmacology ; systems medicine ; Neoplasms. Tumors. Oncology. Including cancer and carcinogens ; RC254-282
    Subject code 006
    Language English
    Publishing date 2020-09-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  6. Article: Investigation of In Vitro Cytotoxicity and Genotoxicity of Wintergreen Oil in Rat Primary Neurons and N2a Neuroblastoma Cells

    Celik, Kubra / Hasan Turkez

    Journal of essential oil-bearing plants. 2016 Aug. 17, v. 19, no. 6

    2016  

    Abstract: Wintergreen oil is obtained from the leaves of a Gaultheria procumbens and is commonly used as a folk remedy. On the other hand neuroblastoma is a childhood cancer of the sympathetic nervous system that originates from developing neural crest cells and ... ...

    Abstract Wintergreen oil is obtained from the leaves of a Gaultheria procumbens and is commonly used as a folk remedy. On the other hand neuroblastoma is a childhood cancer of the sympathetic nervous system that originates from developing neural crest cells and is the second most common solid tumour. It was aimed to investigate the biological activity of Wintergreen oil on primary rat healthy neuron and N2a neuroblastoma cell in relation with concentration for the first time in the extent of this study. The effects of Wintergreen oil at various concentrations (0-400 mg/L) on cell proliferation were determined on both cell culture types by 3-(4,5 dimetylthiazol -2-yl) - 2,5 diphenltetrazolium bromide assay. And total antioxidant capacity and total oxidative stress parameters were used for the assessments of in vitro oxidative effects. In addition, the genetic effect of Wintergreen oil on healthy and cancerous brain cells was assessed by single cell gel electrophoresis (or Comet assay). Our results clearly revealed that Wintergreen oil exhibited antioxidant activities at their low concentrations and cytotoxic at high concentrations. The mean values of the total scores of cells showing DNA damage (for Comet assay) was not found significantly different from the control values in both cell types. Again, Wintergreen oil showed weak anticarcinogenic activity against neuroblastoma cells. In conclusion, within the light of the findings of this in vitro study, it is possible to denote that Wintergreen oil has low potential in cancer prevention and therapy.
    Keywords anticarcinogenic activity ; antioxidant activity ; brain ; cell culture ; cell proliferation ; childhood ; cytotoxicity ; DNA damage ; Gaultheria procumbens ; gel electrophoresis ; genotoxicity ; in vitro studies ; leaves ; neoplasms ; neural crest ; neurons ; oils ; oxidation ; oxidative stress ; rats ; sympathetic nervous system ; therapeutics ; traditional medicine
    Language English
    Dates of publication 2016-0817
    Size p. 1340-1350.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 0976-5026
    DOI 10.1080/0972060X.2014.983993
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  7. Article: Effects of two lichen acids isolated from Pseudevernia furfuracea (L.) Zopf in cultured human lymphocytes

    Emsen, Bugrahan / Ali Aslan / Basak Togar / Hasan Turkez

    Zeitschrift für Naturforschung. 2018 July 26, v. 73, no. 7-8

    2018  

    Abstract: The present study aims at assessing the efficacies of olivetoric acid (OA) and physodic acid (PA) isolated from Pseudevernia furfuracea (L.) Zopf (Parmeliaceae) in human lymphocytes (HLs) in vitro. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium ... ...

    Abstract The present study aims at assessing the efficacies of olivetoric acid (OA) and physodic acid (PA) isolated from Pseudevernia furfuracea (L.) Zopf (Parmeliaceae) in human lymphocytes (HLs) in vitro. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and lactate dehydrogenase assays were performed to establish cytotoxicity in HLs. Besides, oxidative stress and genotoxicity were monitored by estimating the changes of total oxidative stress (TOS) and 8-hydroxy-2′-deoxyguanosine (8-OH-dG) levels, respectively, in HLs. At the same time, OA- and PA-induced total antioxidant capacity (TAC) levels in HLs were determined. Although especially low concentrations of OA (IC50=109.94 mg/L) and PA (IC50=665.49 mg/L) did not show cytotoxic effect at high levels in HLs, it was revealed that cytotoxicity was significantly (p<0.05) associated with oxidative stress and genotoxicity via correlation analysis. While TOS level in HLs did not statistically (p>0.05) increase in the presence of all treatments (0.5–100 mg/L) of PA, TAC level was increased by PA applications in certain concentrations (0.5–10 mg/L). Overall, the obtained data indicate that OA and especially PA as lichen compounds that do not cause oxidative stress can be a new resource of therapeutics as recognized in the present study with their high antioxidant features.
    Keywords acids ; antioxidant activity ; antioxidants ; bromides ; cytotoxicity ; genotoxicity ; humans ; lactate dehydrogenase ; lichens ; lymphocytes ; oxidative stress ; Parmeliaceae ; therapeutics
    Language English
    Dates of publication 2018-0726
    Size p. 303-312.
    Publishing place De Gruyter
    Document type Article
    ZDB-ID 124636-7
    ISSN 1865-7125 ; 0341-0382 ; 0341-0471 ; 0939-5075
    ISSN (online) 1865-7125
    ISSN 0341-0382 ; 0341-0471 ; 0939-5075
    DOI 10.1515/znc-2017-0209
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  8. Article ; Online: Aluminium phosphide-induced genetic and oxidative damages in vitro

    Hasan Türkez / Basak Togar

    Indian Journal of Pharmacology, Vol 45, Iss 1, Pp 71-

    Attenuation by Laurus nobilis L. leaf extract

    2013  Volume 75

    Abstract: Objective: The present investigation was undertaken to assess the protective effect of Laurus nobilis leaf extract (LNE) against aluminum phosphide (AIP)-induced genotoxic and oxidative damages stress in cultured human blood cells in the presence of a ... ...

    Abstract Objective: The present investigation was undertaken to assess the protective effect of Laurus nobilis leaf extract (LNE) against aluminum phosphide (AIP)-induced genotoxic and oxidative damages stress in cultured human blood cells in the presence of a metabolic activator (S9 mix). Materials and Methods: Sister chromatid exchange (SCE) and chromosome aberration (CA) assays were used to assess AlP-induced genotoxicity and to establish the protective effects of LNE. In addition, we determined total antioxidant capacity (TAC) and total oxidative status (TOS) levels in AlP and LNE treated cultures for biomonitoring the oxidative alterations. Results: There was significant increases (P < 0.05) in both SCE and CA frequencies of cultures treated with AlP as compared to controls. Our results also showed that AlP (58 mg/l) caused oxidative stress by altering TAC and TOS levels. However, co-application of LNE (25, 50, 100 and 200 mg/l) and AlP resulted in decreases of SCE, CA rates and TOS level and increases of TAC level as compared to the group treated with AlP alone. Conclusion: The preventive role of LNE in alleviating AlP-induced DNA and oxidative damages was indicated for the first time in the present study.
    Keywords Aluminum phosphide ; genotoxicity ; human blood culture ; Laurus nobilis leaf extract ; oxidative stress ; Therapeutics. Pharmacology ; RM1-950 ; Medicine ; R
    Subject code 500
    Language English
    Publishing date 2013-01-01T00:00:00Z
    Publisher Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  9. Article ; Online: Informing Pharmacokinetic Models With Physiological Data

    J. R. Bosley / Elias Björnson / Cheng Zhang / Hasan Turkez / Jens Nielsen / Mathias Uhlen / Jan Borén / Adil Mardinoglu

    Frontiers in Pharmacology, Vol

    Oral Population Modeling of L-Serine in Humans

    2021  Volume 12

    Abstract: To determine how to set optimal oral L-serine (serine) dose levels for a clinical trial, existing literature was surveyed. Data sufficient to set the dose was inadequate, and so an (n = 10) phase I-A calibration trial was performed, administering serine ... ...

    Abstract To determine how to set optimal oral L-serine (serine) dose levels for a clinical trial, existing literature was surveyed. Data sufficient to set the dose was inadequate, and so an (n = 10) phase I-A calibration trial was performed, administering serine with and without other oral agents. We analyzed the trial and the literature data using pharmacokinetic (PK) modeling and statistical analysis. The therapeutic goal is to modulate specific serine-related metabolic pathways in the liver using the lowest possible dose which gives the desired effect since the upper bound was expected to be limited by toxicity. A standard PK approach, in which a common model structure was selected using a fit to data, yielded a model with a single central compartment corresponding to plasma, clearance from that compartment, and an endogenous source of serine. To improve conditioning, a parametric structure was changed to estimate ratios (bioavailability over volume, for example). Model fit quality was improved and the uncertainty in estimated parameters was reduced. Because of the particular interest in the fate of serine, the model was used to estimate whether serine is consumed in the gut, absorbed by the liver, or entered the blood in either a free state, or in a protein- or tissue-bound state that is not measured by our assay. The PK model structure was set up to represent relevant physiology, and this quantitative systems biology approach allowed a broader set of physiological data to be used to narrow parameter and prediction confidence intervals, and to better understand the biological meaning of the data. The model results allowed us to determine the optimal human dose for future trials, including a trial design component including IV and tracer studies. A key contribution is that we were able to use human physiological data from the literature to inform the PK model and to set reasonable bounds on parameters, and to improve model conditioning. Leveraging literature data produced a more predictive, useful model.
    Keywords Pharmacokinectics ; L-Serine (ser) ; systems biology ; NAFLD (non alcoholic fatty liver disease) ; oral supplementation ; Therapeutics. Pharmacology ; RM1-950
    Subject code 310
    Language English
    Publishing date 2021-05-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  10. Article ; Online: Targeted Gene Candidates for Treatment and Early Diagnosis of Age-Related Macular Degeneration

    Emine Cinici / Ozge Caglar / Mehmet Enes Arslan / Nilay Dilekmen / Bahadır Utlu / Adil Mardinoglu / Hasan Turkez

    BioMed Research International, Vol

    2021  Volume 2021

    Abstract: Age-related macular degeneration (AMD) is an eye disease that impairs the sharp and central vision need for daily activities. Recent advances in molecular biology research not only lead to a better understanding of the genetics and pathophysiology of AMD ...

    Abstract Age-related macular degeneration (AMD) is an eye disease that impairs the sharp and central vision need for daily activities. Recent advances in molecular biology research not only lead to a better understanding of the genetics and pathophysiology of AMD but also to the development of applications based on targeted gene expressions to treat the disease. Clarification of molecular pathways that causing to development and progression in dry and wet types of AMD needs comprehensive and comparative investigations in particular precious biopsies involving peripheral blood samples from the patients. Therefore, in this investigation, dry and wet types of AMD patients and healthy individuals were aimed at investigating in regard to targeted gene candidates by using gene expression analysis for the first time. 13 most potent candidate genes involved in neurodegeneration were selected via in silico approach and investigated through gene expression analysis to suggest new targets for disease therapy. For the analyses, 30 individuals (10 dry and 10 wet types AMD patients and 10 healthy people) were involved in the study. SYBR-Green based Real-Time PCR analysis was performed on isolated peripheral blood mononuclear cells (PBMCs) to analyze differentially expressed genes related to these cases. According to the investigations, only the CRP gene was found to be upregulated for both dry and wet disease types. When the downregulated genes were analyzed, it was found that 11 genes were commonly decreased for both dry and wet types in the aspect of expression pattern. From these genes, CFH, CX3CR1, FLT1, and TIMP3 were found to have the most downregulated gene expression properties for both diseases. From these results, it might be concluded that these common upregulated and downregulated genes could be used as targets for early diagnosis and treatment for AMD.
    Keywords Medicine ; R
    Subject code 610
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

To top