1 Ocak 2023 Dergi makalesi Açık Erişim

Ercelik, Melis; Tunca, Berrin; Ak Aksoy, Secil; Tekin, Cagla; Tezcan, Gulcin

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{
  "@context": "https://schema.org/", 
  "@id": 273490, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "Bursa Uludag Univ, Fac Med, Dept Med Biol, Bursa, Turkiye", 
      "name": "Ercelik, Melis"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Bursa Uludag Univ, Fac Med, Dept Med Biol, Bursa, Turkiye", 
      "name": "Tunca, Berrin"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Bursa Uludag Univ, Inegol Vocat Sch, Bursa, Turkiye", 
      "name": "Ak Aksoy, Secil"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Bursa Uludag Univ, Fac Med, Dept Med Biol, Bursa, Turkiye", 
      "name": "Tekin, Cagla"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Bursa Uludag Univ, Fac Dent, Dept Fundamental Sci, Bursa, Turkiye", 
      "name": "Tezcan, Gulcin"
    }
  ], 
  "datePublished": "2023-01-01", 
  "description": "<p>Objectives: The purpose of this study was to investigate the effect of Olea europaea L. leaf extract (OLE) on senescence and senescence-associated secretory phenotype (SASP) caused by temozolomide (TMZ) in glioblastoma (GB).Materials and Methods: A senescence beta-galactosidase assay and a colony formation assay were used to determine the effects of OLE, TMZ, and OLE + TMZ on the cellular senescence and aggressiveness of GB cell lines T98G and U87MG. mRNA expression levels of p53, a senescence factor, interleukin (IL)-6, matrix metalloproteinases (MMP)-9, and nuclear factor kappa B1 (NF-kappa B1) as SASP factors and Bcl-2 and Bax as senolytic markers were assessed using quantitative reverse transcription-real-time polymerase chain reaction. Cells were double-stained with acridine orange and propidium iodide to observe the cell morphology.Results: TMZ increased the senescence rate of GB cells (p&lt;0.001). Besides, OLE + TMZ reduced the proportion of senescent cells (p&lt;0.001) and their capability to form colonies compared to TMZ-only-treated cells. Additionally, OLE + TMZ co-treatment elevated the mRNA expression levels of MMP-9, IL-6, NF-kappa B1, p53, and the Bax/Bcl-2 ratio compared to TMZ-only treatment. Especially in U87MG cells, involvement of OLE in TMZ treatments increased more than six times in the Bax/Bcl-2 ratio compared to TMZ-only, which induced the apoptosis-like morphological features (p&lt;0.0001).Conclusion: Collectively, our findings presented the inhibitory effect of OLE on TMZ-mediated SASP-factor production in GB and, accordingly, its potential contribution to elongate the time of recurrence.</p>", 
  "headline": "<i>Olea</i><i> europaea</i> L. Leaf Extract Attenuates Temozolomide-Induced Senescence-Associated Secretion Phenotype in Glioblastoma", 
  "identifier": 273490, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "<i>Olea</i><i> europaea</i> L. Leaf Extract Attenuates Temozolomide-Induced Senescence-Associated Secretion Phenotype in Glioblastoma", 
  "url": "https://aperta.ulakbim.gov.tr/record/273490"
}