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  1. Article: The Biology of Toll-Like Receptor 9 and Its Role in Cancer.

    Alzahrani, Badr

    Critical reviews in eukaryotic gene expression

    2021  Volume 30, Issue 5, Page(s) 457–474

    Abstract: Toll-like receptor 9 (TLR9) plays a fundamental role in innate immune responses through pathogen-associated and danger-associated molecular pattern recognition. Ligand recognition by TLR9 results in activation of several signaling pathways, including ... ...

    Abstract Toll-like receptor 9 (TLR9) plays a fundamental role in innate immune responses through pathogen-associated and danger-associated molecular pattern recognition. Ligand recognition by TLR9 results in activation of several signaling pathways, including those involving nuclear factor-kappa B, mitogen-activated protein kinases, and interfer-on-regulatory factors, which promote secretion of proinflammatory cytokines and type I interferons. TLR9 is expressed by immune-mediated cells and in clinical specimens and cell lines of various human cancers. TLR9 appears to act as a double-edged sword in cancer, with some studies indicating that it is associated with increased malignancy and others indicating that it contributes to immune response against cancer. At present, the mechanisms underlying the role of TLR9 in cancer pathophysiology are not completely clear, although various TLR9 agonists and antagonists are being tested in in vitro and in vivo cancer models as well as clinical trials. This review summarizes the current state of knowledge regarding TLR9 features, isoforms, structure, ligands, and signaling, and discusses the roles of TLR9 in cancer pathogenesis. Recent efforts to utilize TLR9 agonists and antagonists as potential anticancer immunotherapy agents are also highlighted.
    MeSH term(s) Cytokines/metabolism ; Humans ; Inflammation Mediators/metabolism ; Neoplasms/metabolism ; Neoplasms/physiopathology ; Signal Transduction ; Toll-Like Receptor 9/agonists ; Toll-Like Receptor 9/antagonists & inhibitors ; Toll-Like Receptor 9/physiology
    Chemical Substances Cytokines ; Inflammation Mediators ; TLR9 protein, human ; Toll-Like Receptor 9
    Language English
    Publishing date 2021-01-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1071345-1
    ISSN 1045-4403
    ISSN 1045-4403
    DOI 10.1615/CritRevEukaryotGeneExpr.2020036214
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The Role of miRNAs, circRNAs and Their Interactions in Development and Progression of Hepatocellular Carcinoma: An Insilico Approach

    Ishaq, Yasmeen / Ikram, Aqsa / Alzahrani, Badr / Khurshid, Sana

    Genes (Basel). 2022 Dec. 21, v. 14, no. 1

    2022  

    Abstract: Hepatocellular carcinoma (HCC) is a type of malignant tumor. miRNAs are noncoding RNAs and their differential expression patterns are observed in HCC-induced by alcoholism, HBV and HCV infections. By acting as a competing endogenous RNA (ceRNA), circRNA ... ...

    Abstract Hepatocellular carcinoma (HCC) is a type of malignant tumor. miRNAs are noncoding RNAs and their differential expression patterns are observed in HCC-induced by alcoholism, HBV and HCV infections. By acting as a competing endogenous RNA (ceRNA), circRNA regulates the miRNA function, indirectly controlling the gene expression and leading to HCC progression. In the present study, data mining was performed to screen out all miRNAs and circRNA involved in alcohol, HBV or HCV-induced HCC with statistically significant (≤0.05%) expression levels reported in various studies. Further, the interaction of miRNAs and circRNA was also investigated to explore their role in HCC due to various causative agents. Together, these study data provide a deeper understanding of the circRNA–miRNA regulatory mechanisms in HCC. These screened circRNA, miRNA and their interactions can be used as prognostic biomarkers or therapeutic targets for the treatment of HCC.
    Keywords alcohol abuse ; alcohols ; biomarkers ; gene expression ; gene expression regulation ; hepatoma ; microRNA ; therapeutics
    Language English
    Dates of publication 2022-1221
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527218-4
    ISSN 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes14010013
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Development of a tetravalent subunit vaccine against dengue virus through a vaccinomics approach.

    Basheer, Amina / Jamal, Syed Babar / Alzahrani, Badr / Faheem, Muhammad

    Frontiers in immunology

    2023  Volume 14, Page(s) 1273838

    Abstract: Dengue virus infection (DVI) is a mosquito-borne disease that can lead to serious morbidity and mortality. Dengue fever (DF) is a major public health concern that affects approximately 3.9 billion people each year globally. However, there is no vaccine ... ...

    Abstract Dengue virus infection (DVI) is a mosquito-borne disease that can lead to serious morbidity and mortality. Dengue fever (DF) is a major public health concern that affects approximately 3.9 billion people each year globally. However, there is no vaccine or drug available to deal with DVI. Dengue virus consists of four distinct serotypes (DENV1-4), each raising a different immunological response. In the present study, we designed a tetravalent subunit multi-epitope vaccine, targeting proteins including the structural protein envelope domain III (EDIII), precursor membrane proteins (prM), and a non-structural protein (NS1) from each serotype by employing an immunoinformatic approach. Only conserved sequences obtained through a multiple sequence alignment were used for epitope mapping to ensure efficacy against all serotypes. The epitopes were shortlisted based on an IC50 value <50, antigenicity, allergenicity, and a toxicity analysis. In the final vaccine construct, overall, 11 B-cell epitopes, 10 HTL epitopes, and 10 CTL epitopes from EDIII, prM, and NS1 proteins targeting all serotypes were selected and joined via KK, AAY, and GGGS linkers, respectively. We incorporated a 45-amino-acid-long B-defensins adjuvant in the final vaccine construct for a better immunogenic response. The vaccine construct has an antigenic score of 0.79 via VaxiJen and is non-toxic and non-allergenic. Our refined vaccine structure has a Ramachandran score of 96.4%. The vaccine has shown stable interaction with TLR3, which has been validated by 50 ns of molecular dynamics (MD) simulation. Our findings propose that a designed multi-epitope vaccine has substantial potential to elicit a strong immune response against all dengue serotypes without causing any adverse effects. Furthermore, the proposed vaccine can be experimentally validated as a probable vaccine, suggesting it may serve as an effective preventative measure against dengue virus infection.
    MeSH term(s) Animals ; Humans ; Dengue Virus ; Vaccines, Combined ; Vaccines, Subunit ; Epitopes, B-Lymphocyte ; Dengue/prevention & control ; Virus Diseases
    Chemical Substances Vaccines, Combined ; Vaccines, Subunit ; Epitopes, B-Lymphocyte
    Language English
    Publishing date 2023-11-17
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1273838
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The Role of miRNAs, circRNAs and Their Interactions in Development and Progression of Hepatocellular Carcinoma: An

    Ishaq, Yasmeen / Ikram, Aqsa / Alzahrani, Badr / Khurshid, Sana

    Genes

    2022  Volume 14, Issue 1

    Abstract: Hepatocellular carcinoma (HCC) is a type of malignant tumor. miRNAs are noncoding RNAs and their differential expression patterns are observed in HCC-induced by alcoholism, HBV and HCV infections. By acting as a competing endogenous RNA (ceRNA), circRNA ... ...

    Abstract Hepatocellular carcinoma (HCC) is a type of malignant tumor. miRNAs are noncoding RNAs and their differential expression patterns are observed in HCC-induced by alcoholism, HBV and HCV infections. By acting as a competing endogenous RNA (ceRNA), circRNA regulates the miRNA function, indirectly controlling the gene expression and leading to HCC progression. In the present study, data mining was performed to screen out all miRNAs and circRNA involved in alcohol, HBV or HCV-induced HCC with statistically significant (≤0.05%) expression levels reported in various studies. Further, the interaction of miRNAs and circRNA was also investigated to explore their role in HCC due to various causative agents. Together, these study data provide a deeper understanding of the circRNA-miRNA regulatory mechanisms in HCC. These screened circRNA, miRNA and their interactions can be used as prognostic biomarkers or therapeutic targets for the treatment of HCC.
    MeSH term(s) Humans ; Carcinoma, Hepatocellular/pathology ; MicroRNAs/genetics ; MicroRNAs/metabolism ; RNA, Circular/genetics ; RNA, Circular/metabolism ; Liver Neoplasms/pathology ; Hepatitis C
    Chemical Substances MicroRNAs ; RNA, Circular
    Language English
    Publishing date 2022-12-21
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2527218-4
    ISSN 2073-4425 ; 2073-4425
    ISSN (online) 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes14010013
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: An In Silico Deep Learning Approach to Multi-Epitope Vaccine Design: A Hepatitis E Virus Case Study.

    Ikram, Aqsa / Alzahrani, Badr / Zaheer, Tahreem / Sattar, Sobia / Rasheed, Sidra / Aurangzeb, Muhammad / Ishaq, Yasmeen

    Vaccines

    2023  Volume 11, Issue 3

    Abstract: Hepatitis E Virus (HEV) is a major cause of acute and chronic hepatitis. The severity of HEV infection increases manyfold in pregnant women and immunocompromised patients. Despite the extensive research on HEV in the last few decades, there is no widely ... ...

    Abstract Hepatitis E Virus (HEV) is a major cause of acute and chronic hepatitis. The severity of HEV infection increases manyfold in pregnant women and immunocompromised patients. Despite the extensive research on HEV in the last few decades, there is no widely available vaccine yet. In the current study, immunoinformatic analyses were applied to predict a multi-epitope vaccine candidate against HEV. From the ORF2 region, 41 conserved and immunogenic epitopes were prioritized. These epitopes were further analyzed for their probable antigenic and non-allergenic combinations with several linkers. The stability of the vaccine construct was confirmed by molecular dynamic simulations. The vaccine construct is potentially antigenic and docking analysis revealed stable interactions with TLR3. These results suggest that the proposed vaccine can efficiently stimulate both cellular and humoral immune responses. However, further studies are needed to determine the immunogenicity of the vaccine construct.
    Language English
    Publishing date 2023-03-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2703319-3
    ISSN 2076-393X
    ISSN 2076-393X
    DOI 10.3390/vaccines11030710
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Therapeutic Impact of ODN2088 to Block TLR9 Activity in Induced Liver Fibrosis Mice.

    Alzahrani, Badr / A M Alameen, Ayman / Tantawy, Ahmed

    Pakistan journal of biological sciences : PJBS

    2021  Volume 24, Issue 1, Page(s) 122–131

    Abstract: Background and objective: Liver fibrosis is the result of an excessive accumulation of extracellular matrix that develops when inflammation and chronic injury form scar tissue in the liver. Toll-like receptor 9 (TLR9) plays a central role in the innate ... ...

    Abstract Background and objective: Liver fibrosis is the result of an excessive accumulation of extracellular matrix that develops when inflammation and chronic injury form scar tissue in the liver. Toll-like receptor 9 (TLR9) plays a central role in the innate immune response by recognition of pathogen-associated molecular patterns (PAMPs) and endogenous damage-associated molecular patterns (DAMPs). This study aimed to show the therapeutic effects of TLR9 antagonist oligonucleotide (ODN) 2088 on liver fibrogenesis.
    Materials and methods: Mice were injected intraperitoneally with carbon tetrachloride (CCl4) or corn oil twice weekly for up to 8 weeks. Mice were also injected with CpG ODN 2088 (50 μg/20 g) daily for the last 4 weeks. At sacrifice, the serum level of liver enzyme activity was measured. Expression of pro-inflammatory and pro-fibrotic biomarkers was analyzed in liver tissue.
    Results: TLR9 antagonist, CpG ODN 2088, remarkably decreased the haptic inflammation and fibrosis during CCl4 administration. Treatment with CpG ODN 2088 resulted in reduced serum Alanine Aminotransferase (ALT) and Aspartate Aminotransferase (AST). That was paralleled with inhibition in the production of intrahepatic inflammatory and fibrotic factors including collagen, α-Smooth Muscle Actin (SMA), Transforming Growth Factor-beta (TGF-β), interleukin-6 (IL-6) and Tumor Necrosis Factor-alpha (TNF-α). Proliferation (Ki-67) and apoptosis (caspase-3) markers were highly suppressed after CpG ODN 2088 administration.
    Conclusion: Our results indicate that TLR9 antagonist, ODN 2088, showed protective effects against hepatics inflammation and fibrosis in the CCl4-induced fibrosis model. These observations suggest that ODN 2088 can be a potential therapeutic target for liver fibrosis treatment.
    MeSH term(s) Animals ; Anti-Inflammatory Agents/pharmacology ; Carbon Tetrachloride ; Caspase 3/metabolism ; Chemical and Drug Induced Liver Injury/etiology ; Chemical and Drug Induced Liver Injury/metabolism ; Chemical and Drug Induced Liver Injury/pathology ; Chemical and Drug Induced Liver Injury/prevention & control ; Cytokines/metabolism ; Disease Models, Animal ; Inflammation Mediators/metabolism ; Ki-67 Antigen/metabolism ; Liver/drug effects ; Liver/metabolism ; Liver/pathology ; Liver Cirrhosis/chemically induced ; Liver Cirrhosis/metabolism ; Liver Cirrhosis/pathology ; Liver Cirrhosis/prevention & control ; Male ; Mice, Inbred BALB C ; Oligodeoxyribonucleotides/pharmacology ; Signal Transduction ; Toll-Like Receptor 9/antagonists & inhibitors ; Toll-Like Receptor 9/metabolism ; Mice
    Chemical Substances Anti-Inflammatory Agents ; Cytokines ; Inflammation Mediators ; Ki-67 Antigen ; Mki67 protein, mouse ; Oligodeoxyribonucleotides ; Tlr9 protein, mouse ; Toll-Like Receptor 9 ; iCpG-ODN ; Carbon Tetrachloride (CL2T97X0V0) ; Casp3 protein, mouse (EC 3.4.22.-) ; Caspase 3 (EC 3.4.22.-)
    Language English
    Publishing date 2021-02-20
    Publishing country Pakistan
    Document type Journal Article
    ISSN 1812-5735
    ISSN (online) 1812-5735
    DOI 10.3923/pjbs.2021.122.131
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: In-silico

    Saleem, Tayyab / Jamal, Syed Babar / Alzahrani, Badr / Basheer, Amina / Wajid Abbasi, Sumra / Ali, Mahwish / Rehman, Ashfaq Ur / Faheem, Muhammad

    Frontiers in molecular biosciences

    2023  Volume 10, Page(s) 1098217

    Abstract: Naegleria ... ...

    Abstract Naegleria fowleri
    Language English
    Publishing date 2023-02-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2814330-9
    ISSN 2296-889X
    ISSN 2296-889X
    DOI 10.3389/fmolb.2023.1098217
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Determination of serum tumor necrosis factor-alpha (TNF-α) levels in metabolic syndrome patients from Saudi population.

    Ullah, Muhammad Ikram / Alzahrani, Badr / Alsrhani, Abdullah / Atif, Muhammad / Alameen, Ayman Ali Mohammed / Ejaz, Hasan

    Pakistan journal of medical sciences

    2021  Volume 37, Issue 3, Page(s) 700–705

    Abstract: Objectives: To detect the relationship between serum tumor necrosis factor-alpha (TNF-α) and metabolic syndrome (MetS) components in patients of the Saudi population.: Methods: This cross-sectional study was carried out at Jouf University Saudi ... ...

    Abstract Objectives: To detect the relationship between serum tumor necrosis factor-alpha (TNF-α) and metabolic syndrome (MetS) components in patients of the Saudi population.
    Methods: This cross-sectional study was carried out at Jouf University Saudi Arabia from September 2019 to August 2020 and comprised of 183 individuals (91 cases and 92 controls). The blood samples were drawn from the patients visiting two tertiary care settings of Al Jouf province. Biochemical analysis was conducted on various instruments, and serum TNF-α was measured by the ELISA method.
    Results: The levels of serum glucose fasting, lipid profile, HbA1c and body mass index (BMI) were raised significantly in cases of MetS than controls (p = 0.001). Serum TNF-α was significantly higher in patients (58.04 ± 15.44) than controls (48.81 ± 10.30). It was correlated with the BMI, blood HbA1c, serum fasting glucose (SFG) and serum high density lipoprotein (HDL). The weak positive correlation was found with BMI (r = 0.18; p = 0.01), serum glucose (r = 0.21; p = 0.007) and HbA1c (r = 0.14; p = 0.04), but found negative association with serum HDL (r = -0.18; p = 0.01).
    Conclusion: The serum TNF-α was raised in metabolic syndrome patients than the healthy controls. It was positively associated with high BMI, serum fasting glucose, and HbA1c and found linked and negatively linked to low HDL levels in MetS patients in the Saudi population.
    Language English
    Publishing date 2021-05-19
    Publishing country Pakistan
    Document type Journal Article
    ZDB-ID 2032827-8
    ISSN 1681-715X ; 1682-024X ; 1017-4699
    ISSN (online) 1681-715X
    ISSN 1682-024X ; 1017-4699
    DOI 10.12669/pjms.37.3.3897
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Assessment of risk factors for deep vein thrombosis associated with natural anticoagulants and fibrinolytic regulatory proteins.

    Abdalhabib, Ezeldine K / Jackson, Denise E / Alzahrani, Badr / Elfaki, Elyasa / Hamza, Alneil / Alanazi, Fehaid / Ali, Elryah I / Algarni, Abdulrahman / Ibrahim, Ibrahim Khider

    Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis

    2022  Volume 33, Issue 3, Page(s) 149–152

    Abstract: Deep vein thrombosis (DVT) is a critical condition and a potential cause of mortality and morbidity in Africa and worldwide with a high recurrence rate. The study was designed to assess the roles of natural anticoagulants and fibrinolytic regulatory ... ...

    Abstract Deep vein thrombosis (DVT) is a critical condition and a potential cause of mortality and morbidity in Africa and worldwide with a high recurrence rate. The study was designed to assess the roles of natural anticoagulants and fibrinolytic regulatory factors in the development of DVT in Sudanese patients. A case-control study was conducted in Omdurman Teaching Hospital, Khartoum State over a period of 1 year. The study enrolled 200 patients diagnosed with DVT and 200 age-matched and gender-matched controls. Demographic data and data on acquired risk factors were collected using a semi-structured questionnaire. Protein C (PC), protein S (PS), antithrombin III (AT-III), thrombin-activable fibrinolysis inhibitor (TAFI), and plasminogen activator inhibitor-1 (PAI-1) were measured in patients and controls. Among the patients with DVT, 5.5% had PC deficiency, 8.5% had PS deficiency, and 3% had AT-III deficiency. Elevated TAFI and PAI-1 levels were demonstrated in 1.5 and 0.5% of patients, respectively. Risk factors for DVT (overweight, surgical history, and family history of DVT) were remarkably higher in patients than in controls. Among the female participants, pregnancy and usage of oral contraceptive pills were the highest associated risk factors for DVT. The findings concluded that the early assessment of risk factors, including the measurements of natural inhibitors, can predict the occurrence of DVT before it is actually detected in patients.
    MeSH term(s) Anticoagulants/pharmacology ; Case-Control Studies ; Female ; Fibrinolysis ; Humans ; Plasminogen Activator Inhibitor 1 ; Pregnancy ; Risk Factors ; Venous Thrombosis/etiology
    Chemical Substances Anticoagulants ; Plasminogen Activator Inhibitor 1
    Language English
    Publishing date 2022-03-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 1033551-1
    ISSN 1473-5733 ; 0957-5235
    ISSN (online) 1473-5733
    ISSN 0957-5235
    DOI 10.1097/MBC.0000000000001116
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Integrated analysis to study the interplay between post-translational modifications (PTM) in hepatitis C virus proteins and hepatocellular carcinoma (HCC) development.

    Ikram, Aqsa / Rauff, Bisma / Alzahrani, Badr / Awan, Faryal Mehwish / Obaid, Ayesha / Naz, Anam / Kakar, Salik Javed / Janjua, Hussnain Ahmed

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 15648

    Abstract: Many PTMs dysregulation is known to be the major cause of many cancers including HCV induced HCC. PTMs of hepatitis C virus (HCV) regions NS3/4A, NS5A and NS5B are crucial for proper protein functions and replication that directly affect the generation ... ...

    Abstract Many PTMs dysregulation is known to be the major cause of many cancers including HCV induced HCC. PTMs of hepatitis C virus (HCV) regions NS3/4A, NS5A and NS5B are crucial for proper protein functions and replication that directly affect the generation of infectious virus particles and completion of its life cycle. In this study, we have performed comprehensive analysis of PTMs within HCV non-structural proteins (NS3/4A, NS5A and NS5B) through bioinformatics analysis to examine post-translational crosstalk between phosphorylation, palmitoylation, methylation, acetylation and ubiquitination sites in selected viral proteins. Our analysis has revealed many highly putative PTMs sites that are also conserved among major genotypes conferring the importance of these sites. We have also analysed viral 3D structures in their modified and unmodified forms to address extent and signatures of structural changes upon PTM. This study provides evidence that PTMs induce significant conformational changes and make viral proteins more stable. To find the potential role of PTMs in HCV induced HCC, docking analysis between selected viral proteins and p38-MAPK has been performed which also confirms their strong association with HCV induced HCC. The major findings proposed that PTMs at specific sites of HCV viral proteins could dysregulate specific pathways that cause the development of HCC.
    MeSH term(s) Carcinoma, Hepatocellular ; Hepacivirus/genetics ; Hepatitis C/complications ; Humans ; Liver Neoplasms ; Protein Processing, Post-Translational ; Viral Proteins/genetics
    Chemical Substances Viral Proteins
    Language English
    Publishing date 2022-09-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-19854-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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