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- 저자 : Merve Erginer (검색결과 2 건)
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Bioactive polymers for cosmetics: unleashing the potential of Chromohalobacter canadensis 28
Merve Erginer,Songül Yaşar Yıldız,Margarita Kambourova,Ebru Toksoy Öner 한국고분자학회 2024 Macromolecular Research Vol.32 No.4
The growing demand for natural products in the cosmetic industry has led to increased interest in natural polysaccharides that offer biocompatibility, biodegradability, and bioactivity. Microorganisms have emerged as a promising source for large-scale production of these polysaccharides under controlled conditions. Among them, the halophilic bacterium Chromohalobacter canadensis 28 stands out as it produces an exopolymer (Cc EP) consisting of exopolysaccharides (EPS) and poly-gamma-glutamic acid (γ-PGA), making it the first halophilic microorganism known for PGA production. This study explores the potential of crude Cc EP and purified γ-PGA for improving the skin barrier, stimulating collagen and hyaluronic acid production, and facilitating wound closure. Through in-vitro experiments using human epidermal keratinocyte cells (HaCaT) and dermal fibroblast cells (PCS-201-012), both the exopolymers were found to exhibit positive effects on cellular proliferation and the expression of genes related to collagen, hyaluronic acid, involucrin, and filaggrin. Furthermore, invitro scratch models demonstrated their ability to enhance wound closure. Based on these promising findings, we propose that Cc EP and purified γ-PGA hold potential as active ingredients in cosmeceutical products. Their ability to promote cell proliferation, improve collagen and hyaluronic acid expression, and enhance wound closure makes them valuable assets for skincare applications.
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Ellidag, Hamit Yasar,Aydin, Ozgur,Eren, Esin,Yilmaz, Necat,Ergin, Merve Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.22
Background: Multiple myeloma (MM) is a haematological cancer characterized by clonal proliferation of plasma cells.The aim of this study was to investigate the activity of serum paraoxonase-1 (PON1) and arylesterase (ARE) in multiple myeloma with and without free light chain excretion(FLCe-MM and NFLCe-MM); as well as to investigate possible alterations in oxidative stress parameters. Materials and Methods: Total thiol (T.thl), oxidative stress index (OSI), total oxidant status (TOS) and total antioxidant status (TAS) were examined in addition to the PON1 and ARE enzyme activities in twenty one FLCe-MM and nineteen NFLCe-MM subjects. Routine parameters like lipid panel, serum total protein, albumin, creatinine, blood urea nitrogen (BUN), uric acid and hemoglobin levels were compared with the oxidative stress markers. Results: Serum total protein, BUN, creatinin, and uric acid levels were significantly higher (p=0.04, p=0.001, p=0.001 and p=0.0022, respectively), while hemoglobin and albumin levels were significantly lower in FLCe-MM patients (p=0.009 and p=0.04,respectively). PON1 and ARE activities were significantly lower in patients with FLCe-MM compared to those with NFLCe-MM (p=0.001 and p=0.008, respectively). Conclusions: Depending on our results of prognostic markers of MM such as age, hemoglobin, albumin, and creatinine we feel confident to presume FLCe-MM as a subgroup with a worse prognosis. A decrease in PON1 and ARE activities may contribute to the prognosis and may be used as a prognostic tool in MM.
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