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  1. Article ; Online: Characterization of circulating leptin-receptor levels following acute sleep restriction: A pilot study on healthy adult females.

    Azzi, Elissar / Fayyad-Kazan, Mohammad / Kabrita, Colette S

    Physiology & behavior

    2024  Volume 279, Page(s) 114543

    Abstract: Background: Insufficient sleep adversely affects energy homeostasis by decreasing leptin levels. The underlying physiological mechanisms; however, remain unclear. Circulating leptin is well described to be regulated by its soluble receptor (sOB-R). ... ...

    Abstract Background: Insufficient sleep adversely affects energy homeostasis by decreasing leptin levels. The underlying physiological mechanisms; however, remain unclear. Circulating leptin is well described to be regulated by its soluble receptor (sOB-R). Intriguingly, the impact of short sleep duration on sOB-R levels has never been characterized.
    Aim: In this study, we investigated, for the first time, the variation of sOB-R levels and its temporal relationship with circulating leptin upon acute sleep restriction.
    Methods: Five adult females were maintained on an 8-hour sleep schedule (bedtime at 00:00) for 1 week before restricting their sleep to 4.5 h (bedtime at 03:30) on 2 consecutive nights. Balanced meals were scheduled to specific hours and sleep was objectively measured. Four-hour blood samples were regularly collected during waking hours between 08:00 and 00:00.
    Results: Sleep restriction resulted in lower leptin (20.9 ± 1.7 vs 25.7 ± 1.7 ng/ml) and higher sOB-R concentrations (24.4 ± 1.2 vs 19.8 ± 1.6 ng/ml). Neither the discordant temporal relationship nor the pattern of leptin and sOB-R were altered in response to sleep restriction.
    Conclusion: Our results suggest that sleep restriction may modulate circulating leptin levels and possibly metabolism via upregulating its soluble receptor. This observation may have valuable therapeutic implications when considering sOB-R as a potential target during the management of metabolic disturbances.
    MeSH term(s) Humans ; Female ; Leptin ; Pilot Projects ; Receptors, Leptin ; Receptors, Cell Surface/metabolism ; Carrier Proteins ; Sleep
    Chemical Substances Leptin ; Receptors, Leptin ; Receptors, Cell Surface ; Carrier Proteins
    Language English
    Publishing date 2024-03-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3907-x
    ISSN 1873-507X ; 0031-9384
    ISSN (online) 1873-507X
    ISSN 0031-9384
    DOI 10.1016/j.physbeh.2024.114543
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  2. Article ; Online: Human CD4

    Fayyad-Kazan, Mohammad / Rouas, Redouane / Merimi, Makram / Najar, Mehdi / Badran, Bassam / Lewalle, Philippe / Fayyad-Kazan, Hussein

    Nucleosides, nucleotides & nucleic acids

    2023  Volume 42, Issue 11, Page(s) 919–929

    Abstract: ... ...

    Abstract CD4
    MeSH term(s) Humans ; T-Lymphocytes, Regulatory/metabolism ; Transcriptome ; Forkhead Transcription Factors/genetics ; Forkhead Transcription Factors/metabolism
    Chemical Substances Forkhead Transcription Factors ; FOXP3 protein, human
    Language English
    Publishing date 2023-05-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2008956-9
    ISSN 1532-2335 ; 1525-7770
    ISSN (online) 1532-2335
    ISSN 1525-7770
    DOI 10.1080/15257770.2023.2216226
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Circulating microRNA profile in response to remdesivir treatment in coronavirus disease 2019 (COVID-19) patients.

    Fayyad-Kazan, Mohammad / Makki, Rawan / Homsi, Mahmoud El / Samadi, Ahmad / Chaaban, Hilal / Majzoub, Rania El / Hamade, Eva / Fayyad-Kazan, Hussein / Badran, Bassam

    Archives of virology

    2023  Volume 168, Issue 7, Page(s) 194

    Abstract: Coronavirus disease 2019 (COVID-19), a serious infectious disease caused by the recently discovered severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has caused a major global health crisis. Although no specific antiviral drugs have been ... ...

    Abstract Coronavirus disease 2019 (COVID-19), a serious infectious disease caused by the recently discovered severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has caused a major global health crisis. Although no specific antiviral drugs have been proven to be fully effective against COVID-19, remdesivir (GS-5734), a nucleoside analogue prodrug, has shown beneficial effects when used to treat severe hospitalized COVID-19 cases. The molecular mechanism underlying this beneficial therapeutic effect is still vaguely understood. In this study, we assessed the effect of remdesivir treatment on the pattern of circulating miRNAs in the plasma of COVID-19 patients, which was analyzed using MiRCURY LNA miRNA miRNome qPCR Panels and confirmed by quantitative real-time RT-PCR (qRT-PCR). The results revealed that remdesivir treatment can restore the levels of miRNAs that are upregulated in COVID-19 patients to the range observed in healthy subjects. Bioinformatics analysis revealed that these miRNAs are involved in diverse biological processes, including the transforming growth factor beta (TGF-β), hippo, P53, mucin-type O-glycan biosynthesis, and glycosaminoglycan biosynthesis signaling pathways. On the other hand, three miRNAs (hsa-miR-7-5p, hsa-miR-10b-5p, and hsa-miR-130b-3p) were found to be upregulated in patients receiving remdesivir treatment and in patients who experienced natural remission. These upregulated miRNAs could serve as biomarkers of COVID-19 remission. This study highlights that the therapeutic potential of remdesivir involves alteration of certain miRNA-regulated biological processes. Targeting of these miRNAs should therefore be considered for future COVID-19 treatment strategies.
    MeSH term(s) Humans ; Circulating MicroRNA ; COVID-19 Drug Treatment ; COVID-19 ; SARS-CoV-2 ; MicroRNAs/genetics
    Chemical Substances Circulating MicroRNA ; remdesivir (3QKI37EEHE) ; MicroRNAs
    Language English
    Publishing date 2023-06-28
    Publishing country Austria
    Document type Journal Article
    ZDB-ID 7491-3
    ISSN 1432-8798 ; 0304-8608
    ISSN (online) 1432-8798
    ISSN 0304-8608
    DOI 10.1007/s00705-023-05825-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Cytokines, Masticatory Muscle Inflammation, and Pain: an Update.

    Ayoub, Sara / Berbéri, Antoine / Fayyad-Kazan, Mohammad

    Journal of molecular neuroscience : MN

    2020  Volume 70, Issue 5, Page(s) 790–795

    Abstract: Cytokines are proteins secreted by diverse types of immune and non-immune cells and play a role in the communication between the immune and nervous systems. Cytokines include lymphokines, monokines, chemokines, interleukins, interferons, colony ... ...

    Abstract Cytokines are proteins secreted by diverse types of immune and non-immune cells and play a role in the communication between the immune and nervous systems. Cytokines include lymphokines, monokines, chemokines, interleukins, interferons, colony stimulating factors, and growth factors. They can be both pro- and anti-inflammatory and have autocrine, paracrine, and endocrine activities. These proteins are involved in initiation and persistence of pain, and the progress of hyperalgesia and allodynia, upon stimulating nociceptive sensory neurons, and inducing central sensitization. The objective of this review is to discuss several types of pro- and anti-inflammatory mediators and their relation with inflammatory pain in masticatory muscles.
    MeSH term(s) Animals ; Craniomandibular Disorders/metabolism ; Facial Pain/metabolism ; Humans ; Inflammation Mediators/metabolism ; Interleukins/metabolism ; Masticatory Muscles/metabolism
    Chemical Substances Inflammation Mediators ; Interleukins
    Language English
    Publishing date 2020-02-01
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1043392-2
    ISSN 1559-1166 ; 0895-8696
    ISSN (online) 1559-1166
    ISSN 0895-8696
    DOI 10.1007/s12031-020-01491-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Immunomodulatory role for MicroRNAs: Regulation of PD-1/PD-L1 and CTLA-4 immune checkpoints expression.

    Skafi, Najwa / Fayyad-Kazan, Mohammad / Badran, Bassam

    Gene

    2020  Volume 754, Page(s) 144888

    Abstract: The development and progression of different pathologies including, cancer, are associated with suppressed immune responses. This restrained immune activity could be associated with the activation of different immune checkpoint pathways that mediate ... ...

    Abstract The development and progression of different pathologies including, cancer, are associated with suppressed immune responses. This restrained immune activity could be associated with the activation of different immune checkpoint pathways that mediate immunosuppressive functions. Therapeutic Protocols based on abolishing the activity of immune check points provided a promising potential for treating cancer. Among the distinct known immune checkpoints, PD-1/PD-L1 and CTLA-4, are the most studied and have been the focus for development of different blocking agents. Monoclonal antibodies that can block PD-1, PD-L1 or CTLA4 have been approved for treatment of different cancers. MicroRNAs (miRNAs), short non-coding regulatory RNA molecules, could repress mRNA expression at a post-transcriptional level. Many miRNAs have been reported to modulate the expression of CTLA-4 and PD-1/PD-L1, either directly or indirectly, in multiple pathological cases, mainly cancer. In this review, after a brief introduction about T cell activation and immune checkpoints, the miRNAs regulating the expression of CTLA-4 and PD-1/PD-L1 are discussed with highlights on their role in cancer. Many of these miRNAs could serve as novel treatments in different types of cancer as detailed throughout the review.
    MeSH term(s) B7-H1 Antigen/antagonists & inhibitors ; B7-H1 Antigen/immunology ; CTLA-4 Antigen/antagonists & inhibitors ; CTLA-4 Antigen/immunology ; Gene Expression Regulation, Neoplastic ; Humans ; Immunotherapy/methods ; Lymphocyte Activation ; MicroRNAs/pharmacology ; Neoplasms/genetics ; Neoplasms/immunology ; Neoplasms/pathology ; Neoplasms/therapy ; Programmed Cell Death 1 Receptor/antagonists & inhibitors ; Programmed Cell Death 1 Receptor/immunology
    Chemical Substances B7-H1 Antigen ; CD274 protein, human ; CTLA-4 Antigen ; CTLA4 protein, human ; MicroRNAs ; PDCD1 protein, human ; Programmed Cell Death 1 Receptor
    Language English
    Publishing date 2020-06-13
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 391792-7
    ISSN 1879-0038 ; 0378-1119
    ISSN (online) 1879-0038
    ISSN 0378-1119
    DOI 10.1016/j.gene.2020.144888
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  6. Article ; Online: An update on human periapical cyst-mesenchymal stem cells and their potential applications in regenerative medicine.

    Ayoub, Sara / Berbéri, Antoine / Fayyad-Kazan, Mohammad

    Molecular biology reports

    2020  Volume 47, Issue 3, Page(s) 2381–2389

    Abstract: The broad clinical applications of Mesenchymal Stem Cells (MSCs) in the regenerative medicine field is attributed to their ability to self-renew and differentiate into multiple cellular lineages. Nowadays, MSCs can be derived from a variety of adult and ... ...

    Abstract The broad clinical applications of Mesenchymal Stem Cells (MSCs) in the regenerative medicine field is attributed to their ability to self-renew and differentiate into multiple cellular lineages. Nowadays, MSCs can be derived from a variety of adult and fetal tissues including bone marrow, adipose tissue, umbilical cord and placenta. The difficulties associated with the isolation of MSCs from certain tissues such as bone marrow promoted the search for alternative tissues which are easily accessible. Oral derived MSCs include dental pulp stem cells (DPSCs), dental follicle progenitor cells (DFPC), and periodontal ligament stem cells (PDLSC). Being abundant and easily accessible, oral derived MSCs represent an interesting alternative MSC type to be employed in regenerative medicine. Human periapical cyst-mesenchymal stem cells (hPCy-MSCs) correspond to a newly discovered and characterized MSC subtype. Interestingly, hPCy-MSCs are collected from periapical cysts, which are a biological waste, without any influence on the other healthy tissues in oral cavity. hPCy-MSCs exhibit cell surface marker profile similar to that of other oral derived MSCs, show high proliferative potency, and possess the potential to differentiate into different cell types such as osteoblasts, adipocytes and neurons-like cells. hPCy-MSCs, therefore, represent a novel promising MSCs type to be applied in regenerative medicine domain. In this review, we will compare the different types of dental derived MSCs, we will highlight the isolation technique, the characteristics, and the therapeutic potential of hPCy-MSCs.
    MeSH term(s) Cell Culture Techniques ; Cell Differentiation ; Cell Lineage ; Cell Separation/methods ; Disease Progression ; Disease Susceptibility ; Humans ; Immunomodulation ; Mesenchymal Stem Cell Transplantation ; Mesenchymal Stem Cells/cytology ; Mesenchymal Stem Cells/metabolism ; Neoplasms/etiology ; Neoplasms/metabolism ; Neoplasms/pathology ; Organ Specificity ; Radicular Cyst ; Regenerative Medicine/methods ; Tissue Engineering
    Language English
    Publishing date 2020-02-06
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 186544-4
    ISSN 1573-4978 ; 0301-4851
    ISSN (online) 1573-4978
    ISSN 0301-4851
    DOI 10.1007/s11033-020-05298-6
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  7. Article ; Online: Glutamine transport as a possible regulator of nitrogen catabolite repression in Saccharomyces cerevisiae.

    Georis, Isabelle / Fayyad-Kazan, Mohammad / Zaremba, Evi / Vierendeels, Fabienne / Roovers, Martine / Dubois, Evelyne

    Yeast (Chichester, England)

    2022  Volume 39, Issue 9, Page(s) 493–507

    Abstract: Nitrogen catabolite repression (NCR) is a major transcriptional control pathway governing nitrogen use in yeast, with several hundred of target genes identified to date. Early and extensive studies on NCR led to the identification of the 4 GATA zinc ... ...

    Abstract Nitrogen catabolite repression (NCR) is a major transcriptional control pathway governing nitrogen use in yeast, with several hundred of target genes identified to date. Early and extensive studies on NCR led to the identification of the 4 GATA zinc finger transcription factors, but the primary mechanism initiating NCR is still unclear up till now. To identify novel players of NCR, we have undertaken a genetic screen in an NCR-relieved gdh1Δ mutant, which led to the identification of four genes directly linked to protein ubiquitylation. Ubiquitylation is an important way of regulating amino acid transporters and our observations being specifically observed in glutamine-containing media, we hypothesized that glutamine transport could be involved in establishing NCR. Stabilization of Gap1 at the plasma membrane restored NCR in gdh1Δ cells and AGP1 (but not GAP1) deletion could relieve repression in the ubiquitylation mutants isolated during the screen. Altogether, our results suggest that deregulated glutamine transporter function in all three weak nitrogen derepressed (wnd) mutants restores the repression of NCR-sensitive genes consecutive to GDH1 deletion.
    MeSH term(s) Amino Acid Transport Systems, Neutral/genetics ; Amino Acid Transport Systems, Neutral/metabolism ; Catabolite Repression ; GATA Transcription Factors/chemistry ; GATA Transcription Factors/genetics ; GATA Transcription Factors/metabolism ; Gene Expression Regulation, Fungal ; Glutamine/genetics ; Glutamine/metabolism ; Nitrogen/metabolism ; Saccharomyces cerevisiae/genetics ; Saccharomyces cerevisiae/metabolism ; Saccharomyces cerevisiae Proteins/genetics ; Saccharomyces cerevisiae Proteins/metabolism ; Transcription Factors/genetics ; Transcription Factors/metabolism
    Chemical Substances AGP1 protein, S cerevisiae ; Amino Acid Transport Systems, Neutral ; GATA Transcription Factors ; Saccharomyces cerevisiae Proteins ; Transcription Factors ; Glutamine (0RH81L854J) ; Nitrogen (N762921K75)
    Language English
    Publishing date 2022-09-05
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 632636-5
    ISSN 1097-0061 ; 0749-503X
    ISSN (online) 1097-0061
    ISSN 0749-503X
    DOI 10.1002/yea.3809
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  8. Article ; Online: Effect of Ultraviolet Radiation and Benzo[a]pyrene Co-Exposure on Skin Biology: Autophagy as a Potential Target.

    Fayyad-Kazan, Mohammad / Kobaisi, Farah / Nasrallah, Ali / Matarrese, Patrick / Fitoussi, Richard / Bourgoin-Voillard, Sandrine / Seve, Michel / Rachidi, Walid

    International journal of molecular sciences

    2023  Volume 24, Issue 6

    Abstract: The skin is the outermost protective barrier of the human body. Its role is to protect against different physical, chemical, biological and environmental stressors. The vast majority of studies have focused on investigating the effects of single ... ...

    Abstract The skin is the outermost protective barrier of the human body. Its role is to protect against different physical, chemical, biological and environmental stressors. The vast majority of studies have focused on investigating the effects of single environmental stressors on skin homeostasis and the induction of several skin disorders, such as cancer or ageing. On the other hand, much fewer studies have explored the consequences of the co-exposure of skin cells to two or more stressors simultaneously, which is much more realistic. In the present study, we investigated, using mass-spectrometry-based proteomic analysis, the dysregulated biological functions in skin explants after their co-exposure to ultraviolet radiation (UV) and benzo[a]pyrene (BaP). We observed that several biological processes were dysregulated, among which autophagy appeared to be significantly downregulated. Furthermore, immunohistochemistry analysis was carried out to validate the downregulation of the autophagy process further. Altogether, the output of this study provides an insight into the biological responses of skin to combined exposure to UV + BaP and highlights autophagy as a potential target that might be considered in the future as a novel candidate for pharmacological intervention under such stress conditions.
    MeSH term(s) Humans ; Benzo(a)pyrene/toxicity ; Ultraviolet Rays/adverse effects ; Proteomics ; Skin/radiation effects ; Autophagy
    Chemical Substances Benzo(a)pyrene (3417WMA06D)
    Language English
    Publishing date 2023-03-20
    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/ijms24065863
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  9. Article: MicroRNAs in breast cancer: New maestros defining the melody.

    Khalife, Hoda / Skafi, Najwa / Fayyad-Kazan, Mohammad / Badran, Bassam

    Cancer genetics

    2020  Volume 246-247, Page(s) 18–40

    Abstract: MicroRNAs, short non-coding single-stranded RNAs, are important regulators and gatekeepers of the coding genes in the human genome. MicroRNAs are highly conserved among species and expressed in different tissues and cell types. They are involved in ... ...

    Abstract MicroRNAs, short non-coding single-stranded RNAs, are important regulators and gatekeepers of the coding genes in the human genome. MicroRNAs are highly conserved among species and expressed in different tissues and cell types. They are involved in almost all the biological processes as apoptosis, proliferation, cell cycle arrest and differentiation. Playing all these roles, it is not surprising that the deregulation of the microRNA profile causes a number of diseases including cancer. Breast cancer, the most commonly diagnosed malignancy in women, accounts for the highest cancer-related deaths worldwide. Different microRNAs were shown to be up or down regulated in breast cancer. MicroRNAs can function as oncogenes or tumor suppressors according to their targets. In this review, the most common microRNAs implicated in breast cancer are fully illustrated with their targets. Besides, the review highlights the effect of exosomal microRNA on breast cancer and the effect of microRNAs on drug and therapies resistance as well as the miRNA-based therapeutic strategies used until today.
    MeSH term(s) Biomarkers, Tumor/genetics ; Breast Neoplasms/genetics ; Breast Neoplasms/pathology ; Breast Neoplasms/therapy ; Female ; Gene Expression Regulation, Neoplastic ; Humans ; MicroRNAs/genetics ; Prognosis
    Chemical Substances Biomarkers, Tumor ; MicroRNAs
    Language English
    Publishing date 2020-08-07
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2599227-2
    ISSN 2210-7762
    ISSN 2210-7762
    DOI 10.1016/j.cancergen.2020.08.005
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  10. Article ; Online: The potential of mesenchymal stromal cells in immunotherapy.

    Fayyad-Kazan, Mohammad / Fayyad-Kazan, Hussein / Lagneaux, Laurence / Najar, Mehdi

    Immunotherapy

    2016  Volume 8, Issue 8, Page(s) 839–842

    Language English
    Publishing date 2016-07
    Publishing country England
    Document type Journal Article
    ISSN 1750-7448
    ISSN (online) 1750-7448
    DOI 10.2217/imt-2016-0037
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