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Öğe A Comprehensive Review of Nanoparticles: From Classification to Application and Toxicity(Mdpi, 2024) Eker, Furkan; Duman, Hatice; Akdasci, Emir; Bolat, Ecem; Saritas, Suemeyye; Karav, Sercan; Witkowska, Anna MariaNanoparticles are structures that possess unique properties with high surface area-to-volume ratio. Their small size, up to 100 nm, and potential for surface modifications have enabled their use in a wide range of applications. Various factors influence the properties and applications of NPs, including the synthesis method and physical attributes such as size and shape. Additionally, the materials used in the synthesis of NPs are primary determinants of their application. Based on the chosen material, NPs are generally classified into three categories: organic, inorganic, and carbon-based. These categories include a variety of materials, such as proteins, polymers, metal ions, lipids and derivatives, magnetic minerals, and so on. Each material possesses unique attributes that influence the activity and application of the NPs. Consequently, certain NPs are typically used in particular areas because they possess higher efficiency along with tenable toxicity. Therefore, the classification and the base material in the NP synthesis hold significant importance in both NP research and application. In this paper, we discuss these classifications, exemplify most of the major materials, and categorize them according to their preferred area of application. This review provides an overall review of the materials, including their application, and toxicity.Öğe Antimicrobial Properties of Colostrum and Milk(Mdpi, 2024) Eker, Furkan; Akdasci, Emir; Duman, Hatice; Yalcintas, Yalcin Mert; Canbolat, Ahmet Alperen; Kalkan, Arda Erkan; Karav, SercanThe growing number of antibiotic resistance genes is putting a strain on the ecosystem and harming human health. In addition, consumers have developed a cautious attitude towards chemical preservatives. Colostrum and milk are excellent sources of antibacterial components that help to strengthen the immunity of the offspring and accelerate the maturation of the immune system. It is possible to study these important defenses of milk and colostrum, such as lactoferrin, lysozyme, immunoglobulins, oligosaccharides, etc., as biotherapeutic agents for the prevention and treatment of numerous infections caused by microbes. Each of these components has different mechanisms and interactions in various places. The compound's mechanisms of action determine where the antibacterial activity appears. The activation of the antibacterial activity of milk and colostrum compounds can start in the infant's mouth during lactation and continue in the gastrointestinal regions. These antibacterial properties possess potential for therapeutic uses. In order to discover new perspectives and methods for the treatment of bacterial infections, additional investigations of the mechanisms of action and potential complexes are required.Öğe Application of a novel endo-?-N-acetylglucosaminidase to isolate an entirely new class of bioactive compounds: N-glycans(Elsevier, 2018) Karav, SercanMilk contains all essential nutrients such as proteins, lipids, carbohydrates, and minerals that help the development and growth of infants. In addition to these well-known compounds, milk also contains other structures that have not been fully characterized such as glycans. Glycans are important carbohydrate moieties attached to proteins and their synthesis takes place in the mammalian epithelial cells of animals. Although glycans are a small portion of the total dry mass of milk, there is a growing interest in these compounds because of their protective, stabilizing, and barrier functions. Further investigations of glycans are limited because of the lack of deglycosylation methods on a large scale and high-efficiency glycan release. Of the currently available methods, the enzymatic and chemical-based methods do not provide high-quality glycan release. They mostly cause the total destruction of released glycans and the remaining polypeptide structure. Recently, a novel N-glycosidase (EndoBI-1) that removes the N, N’-diacetyl chitobiose moiety from the N-glycan core of various glycoproteins has been isolated from the Bifidobacterium longum subsp. infantis ATCC 15697. © 2019 Elsevier Inc. All rights reserved.Öğe Application of industrial treatments to donor human milk: influence of pasteurization treatments, storage temperature, and time on human milk gangliosides(Springernature, 2018) Salcedo, Jaime; Karav, Sercan; Le Parc, Annabelle; Cohen, Joshua L.; de Moura Bell, Juliana M. L. N.; Sun, Adam; Lange, Matthew C.Donor milk is the best option when mother's own milk is unavailable. Heat treatments are applied to ensure donor milk safety. The effects of heat treatments on milk gangliosides-bioactive compounds with beneficial antibacterial, anti-inflammatory, and prebiotic roles-have not been studied. The most abundant gangliosides in non-homogenized human milk were characterized and quantified by liquid chromatography-mass spectrometry (LC-MS)/MS before and after pasteurization treatments mimicking industrial conditions (63 degrees C/30 min, 72 degrees C/15 s, 127 degrees C/5 s, and 140 degrees C/6 s). Ganglioside stability over a 3-month period was assessed following the storage at 4 and 23 degrees C. Independent of the heat treatment applied, gangliosides were stable after 3 months of storage at 4 or 23 degrees C, with only minor variations in individual ganglioside structures. These findings will help to define the ideal processing and storage conditions for donor milk to maximize the preservation of the structure of bioactive compounds to enhance the health of fragile newborns. Moreover, these results highlight the need for, and provide a basis for, a standardized language enabling biological and food companies, regulatory agencies, and other food stakeholders to both annotate and compute the ways in which production, processing, and storage conditions alter or maintain the nutritive, bioactive, and organoleptic properties of ingredients and foods, as well as the qualitative effects these foods and ingredients may have on conferring phenotype in the consuming organism. Donor milk treatment: key nutrients preserved after pasteurization Donor human milk, the best alternative to mother's own milk, usually needs to be pasteurized before use out of safety concerns. Daniela Barile at University of California Davis, USA, and colleagues studied the effects of heat treatment and storage temperature and time on milk gangliosides, a class of sugar-derived compounds important for neural and brain development of newborns, among other bioactivities. They found that, while there were minor structural changes during mimicked industrial pasteurization processes, gangliosides remain stable for at least three months either in the refrigerator or at room temperature. These results may help standardize the processing protocols and storage conditions for donor milk, and the methods can be extended to other bioactive components.Öğe BCM-7: Opioid-like Peptide with Potential Role in Disease Mechanisms(Mdpi, 2024) Bolat, Ecem; Eker, Furkan; Yilmaz, Selin; Karav, Sercan; Oz, Emel; Brennan, Charles; Proestos, CharalamposBovine milk is an essential supplement due to its rich energy- and nutrient-rich qualities. Caseins constitute the vast majority of the proteins in milk. Among these, beta-casein comprises around 37% of all caseins, and it is an important type of casein with several different variants. The A1 and A2 variants of beta-casein are the most researched genotypes due to the changes in their composition. It is accepted that the A2 variant is ancestral, while a point mutation in the 67th amino acid created the A1 variant. The digestion derived of both A1 and A2 milk is BCM-7. Digestion of A2 milk in the human intestine also forms BCM-9 peptide molecule. The opioid-like characteristics of BCM-7 are highlighted for their potential triggering effect on several diseases. Most research has been focused on gastrointestinal-related diseases; however other metabolic and nervous system-based diseases are also potentially triggered. By manipulating the mechanisms of these diseases, BCM-7 can induce certain situations, such as conformational changes, reduction in protein activity, and the creation of undesired activity in the biological system. Furthermore, the genotype of casein can also play a role in bone health, such as altering fracture rates, and calcium contents can change the characteristics of dietary products. The context between opioid molecules and BCM-7 points to a potential triggering mechanism for the central nervous system and other metabolic diseases discussed.Öğe Benefits of A2 Milk for Sports Nutrition, Health and Performance(Frontiers Media Sa, 2022) Kaplan, Merve; Baydemir, Baris; Gunar, Bilgetekin Burak; Arslan, Aysenur; Duman, Hatice; Karav, SercanBovine milk is one of the best pre-and pro-workout sources for athletes owing to its rich nutritional content. Even though bovine milk consumption significantly benefits athletes' health and performance, many athletes cannot consume bovine milk since they struggle with gastrointestinal problems caused after milk consumption. Especially, the consumption of regular milk, which contains A1 beta -casein, is associated with a variety of diseases ranging from gastrointestinal discomfort to ischemic heart diseases. The main reason behind this is related to beta -casomorphine 7 (BCM-7), which is derived from A1 beta -casein during the digestion of A1 milk. A1 beta -casein is formed as a result of a point mutation in the position of 67(th) in the amino acid sequence A2 beta -casein by changing proline to histidine. Therefore, this mutated form of beta -casein in regular milk cannot easily be digested by the human-associated digestion enzymes. A2 milk, which includes A2 beta -casein instead of A1 beta -casein, is the best substitute for regular milk with the same nutritional content. This natural form of milk positively affects the athlete's health as well as performance without causing any gastrointestinal discomfort or more serious problems which are seen in the consumption of regular milk. In this review, A2 milk and its potential health effects in comparison to diseases related to A1 milk consumption are discussed.Öğe Beyond the Hayflick limit: How microbes influence cellular aging(Elsevier Ireland Ltd, 2025) Abavisani, Mohammad; Faraji, Saba; Ebadpour, Negar; Karav, Sercan; Sahebkar, AmirhosseinCellular senescence, a complex biological process resulting in permanent cell-cycle arrest, is central to aging and age-related diseases. A key concept in understanding cellular senescence is the Hayflick Limit, which refers to the limited capacity of normal human cells to divide, after which they become senescent. Senescent cells (SC) accumulate with age, releasing pro-inflammatory and tissue-remodeling factors collectively known as the senescence-associated secretory phenotype (SASP). The causes of senescence are multifaceted, including telomere attrition, oxidative stress, and genotoxic damage, and they extend to influences from microbial sources. Research increasingly emphasizes the role of the microbiome, especially gut microbiota (GM), in modulating host senescence processes. Beneficial microbial metabolites, such as short-chain fatty acids (SCFAs), support host health by maintaining antioxidant defenses and reducing inflammation, potentially mitigating senescence onset. Conversely, pathogenic bacteria like Pseudomonas aeruginosa and Helicobacter pylori introduce factors that damage host DNA or increase ROS, accelerating senescence via pathways such as NF-?B and p53-p21. This review explores the impact of bacterial factors on cellular senescence, highlighting the role of specific bacterial toxins in promoting senescence. Additionally, it discusses how dysbiosis and the loss of beneficial microbial species further contribute to age-related cellular deterioration. Modulating the gut microbiome to delay cellular senescence opens a path toward targeted anti-aging strategies. This work underscores the need for deeper investigation into microbial influence on aging, supporting innovative interventions to manage and potentially reverse cellular senescence. © 2025 Elsevier B.V.Öğe Biofortified Whey/Deglycosylated Whey and Chickpea Protein Matrices: Functional Enrichment by Black Mulberry Polyphenols(Springer, 2022) Özleyen, Adem; Çınar, Zeynep Özlem; Karav, Sercan; Bayraktar, Ayşe; Arslan, Ayşenur; Kayılı, H. Mehmet; Salih, Bekir; Boyuneğmez Tümer, TuğbaMorus nigra L. (black mulberry-BM) is a promising nutraceutical fruit containing biologically active polyphenols like anthocyanins, proanthocyanidins, catechins, and stilbenes, with well-established anti-inflammatory, antidiabetic, anti-obesity, and anticancer biofunctions. However, these health-promoting properties in raw fruit are greatly masked due to the presence of soluble and insoluble carbohydrates in excess amounts restricting daily intake of the required dose to achieve targeted effects. In the current study, different protein sources (defatted whey and chickpea flours) were optimized through different conditions to capture polyphenols from BM juice while diminishing its glucose content. To optimize polyphenol-protein interactions, various pHs (3.7, 4.2, and 4.7), matrix concentrations (20, 50, and 80 g protein/L), and incubation times (5, 20, and 45 min) were tested. In the present work, optimized BM polyphenol enriched whey matrix inhibited pro-inflammatory mediators and promoted Nrf-2 dependent cytoprotective enzyme expressions in lipopolysaccharide (LPS) induced macrophages at low doses. In addition, whey proteins were also subjected to an enzymatic deglycosylation process by using recently identified EndoBI-1 enzyme for the specific cleavage of N-glycan core in all glycan types including high mannoses, hybrids as well as complex glycans found on defatted whey proteins. After this process, the polyphenol sorption capacity of deglycosylated whey proteins was found to be significantly higher (37%) than the capacity of non-treated normal whey protein under optimized conditions. In conclusion, deglycosylation of protein matrices could be a novel strategy for efficient sorption/concentration of polyphenols from fruits and vegetables, however, more detailed studies are needed to understand this effect.Öğe Bovine colostrum and its potential contributions for treatment and prevention of COVID-19(Frontiers Media Sa, 2023) Duman, Hatice; Karav, SercanBovine colostrum (BC) is the initial milk an animal produces after giving birth, particularly in the first few days. Numerous bioactive substances found in BC, including proteins, enzymes, growth factors, immunoglobulins, etc., are beneficial to human health. BC has a significant role to play as part of a healthy diet, with well-documented health and nutritional advantages for people. Therefore, the use of BC and its crucial derivatives in the development of functional food and pharmaceuticals for the prevention of several diseases such as gastrointestinal and respiratory system disorders is becoming increasingly popular around the world. A novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was identified as the cause of a cluster of pneumonia cases that is called Coronavirus Disease 2019 (COVID-19) in China. After the first SARS-CoV-2 virus-related fatality was announced, the illness quickly spread throughout China and to other continents, causing a pandemic. Since then, numerous studies have been initiated to develop safe and efficient treatments. To prevent viral infection and potential lingering effects, it is important to investigate alternative treatments for COVID-19. Due to its effective bioactive profile and its immunomodulatory roles in biological processes, BC might be considered a promising approach to assist in combating people affected by the SARS-CoV-2 or prevention from the virus. BC has immunomodulatory effects because to its high concentration of bioactive components such as immunoglobulins, lactoferrin, cytokines, and growth factors, etc., which might help control immunological responses, potentially fostering a balanced immune response. Furthermore, its bioactive components have a potential cross-reactivity against SARS-CoV-2, aiding in virus neutralization and its comprehensive food profile also supplies important vitamins, minerals, and amino acids, fostering a healthy immune system. Hence, the possible contributions of BC to the management of COVID-19 were reviewed in this article based on the most recent research on the subject. Additionally, the key BC components that influence immune system modulation were evaluated. These components may serve as potential mediators or therapeutic advantages in COVID-19.Öğe Bovine Colostrum and Its Potential for Human Health and Nutrition(Frontiers Media S.A., 2021) Arslan, Ayşenur; Kaplan, Merve; Duman, Hatice; Bayraktar, Ayşe; Karav, Sercan; Ertürk, Melih; Henrick, Bethany M.; Frese, Steven A.Colostrum is the first milk produced post-partum by mammals and is compositionally distinct from mature milk. Bovine colostrum has a long history of consumption by humans, and there have been a number of studies investigating its potential for applications in human nutrition and health. Extensive characterization of the constituent fractions has identified a wealth of potentially bioactive molecules, their potential for shaping neonatal development, and the potential for their application beyond the neonatal period. Proteins, fats, glycans, minerals, and vitamins are abundant in colostrum, and advances in dairy processing technologies have enabled the advancement of bovine colostrum from relative limitations of a fresh and unprocessed food to a variety of potential applications. In these forms, clinical studies have examined bovine colostrum as having the substantial potential to improve human health. This review discusses the macro-and micronutrient composition of colostrum as well as describing well-characterized bioactives found in bovine colostrum and their potential for human health. Current gaps in knowledge are also identified and future directions are considered in order to elevate the potential for bovine colostrum as a component of a healthy diet for a variety of relevant human populations.Öğe Bovine Colostrum in Pediatric Nutrition and Health(Mdpi, 2024) Canbolat, Ahmet Alperen; Lombardo, Mauro; Mondragon, Alicia del Carmen; Lopez, Jose Manuel Miranda; Bechelany, Mikhael; Karav, SercanBovine colostrum (BC), the first milk secreted by mammals after birth, is a trending alternative source for supplementing infants and children, offering benefits for gut and immune health. Its rich components, such as proteins, immunoglobulins, lactoferrin, and glycans, are used to fortify diets and support development. Preterm development is crucial, especially in the maturation of essential systems, and from 2010 to 2020, approximately 15% of all premature births occurred at less than 32 weeks of gestation worldwide. This review explores the composition, benefits, and effects of BC on general infants and children, along with preterm infants who require special care, and highlights its role in growth and development. BC is also associated with specific pediatric diseases, including necrotizing enterocolitis (NEC), infectious diarrhea, inflammatory bowel disease (IBD), short-bowel syndrome (SBS), neonatal sepsis, gastrointestinal and respiratory infections, and some minor conditions. This review also discusses the clinical trials regarding these specific conditions which are occasionally encountered in preterm infants. The anti-inflammatory, antimicrobial, immunomodulatory, and antiviral properties of BC are discussed, emphasizing its mechanisms of action. Clinical trials, particularly in humans, provide evidence supporting the inclusion of BC in formulas and diets, although precise standards for age, feeding time, and amounts are needed to ensure safety and efficacy. However, potential adverse effects, such as allergic reactions to caseins and immunoglobulin E, must be considered. More comprehensive clinical trials are necessary to expand the evidence on BC in infant feeding, and glycans, important components of BC, should be further studied for their synergistic effects on pediatric diseases. Ultimately, BC shows promise for pediatric health and should be incorporated into nutritional supplements with caution.Öğe Characterization of recombinant human lactoferrin N-glycans expressed in the milk of transgenic cows(Public Library Science, 2017) Le Parc, Annabelle; Karav, Sercan; Rouquie, Camille; Maga, Elizabeth A.; Bunyatratchata, Apichaya; Barile, DanielaLactoferrin (LF) is one of the most abundant bioactive glycoproteins in human milk. Glycans attached through N-glycosidic bonds may contribute to Lactoferrin functional activities. In contrast, LF is present in trace amounts in bovine milk. Efforts to increase LF concentration in bovine milk led to alternative approaches using transgenic cows to express human lactoferrin (hLF). This study investigated and compared N-glycans in recombinant human lactoferrin (rhLF), bovine lactoferrin (bLF) and human lactoferrin by Nano-LC-Chip-Q-TOF Mass Spectrometry. The results revealed a high diversity of N-glycan structures, including fucosylated and sialylated complex glycans that may contribute additional bioactivities. rhLF, bLF and hLF had 23, 27 and 18 N-glycans respectively with 8 N-glycan in common overall. rhLF shared 16 N-glycan with bLF and 9 N-glycan with hLF while bLF shared 10 N-glycan with hLF. Based on the relative abundances of N-glycan types, rhLF and hLF appeared to contain mostly neutral complex/ hybrid N-glycans (81% and 52% of the total respectively) whereas bLF was characterized by high mannose glycans (65%). Interestingly, the majority of hLF N-glycans were fucosylated (88%), whereas bLF and rhLF had only 9% and 20% fucosylation, respectively. Overall, this study suggests that rhLF N-glycans share more similarities to bLF than hLF.Öğe Decoy oligodeoxynucleotides: A promising therapeutic strategy for inflammatory skin disorders(Elsevier Science Inc, 2024) Mahjoubin-Tehran, Maryam; Rezaei, Samaneh; Karav, Sercan; Kesharwani, Prashant; Sahebkar, AmirhosseinChronic inflammatory skin conditions such as psoriasis and atopic dermatitis (AD) impose a significant burden on both the skin and the overall well-being of individuals, leading to a diminished quality of life. Despite the use of conventional treatments like topical steroids, there remains a need for more effective and safer therapeutic options to improve the lives of patients with severe skin conditions. Molecular therapy has emerged as a promising approach to address disorders such as atopic dermatitis, psoriasis, and contact hypersensitivity. One strategy to counteract the disease processes involves targeting the transcriptional process. A novel form of gene therapy utilizes double-stranded oligodeoxynucleotides (ODNs), also known as decoys, that contain cis-elements. By introducing these decoy ODNs through transfection, the cis-trans interactions are disrupted, leading to the inhibition of trans-factors from binding to the intrinsic cis-elements and thus regulating gene expression. In this review, we have summarized studies investigating the therapeutic effects of decoy ODNs on inflammatory skin diseases. Various transcription factors, including NF-kB, STAT6, HIF-1 alpha/STAT5, STAT1, and Smad, have been targeted and inhibited using designed decoy ODNs for the treatment of atopic dermatitis, psoriasis, hypertrophic scarring, and contact hypersensitivity. The findings of these studies confirm the significant potential of the decoy approach in the treatment of inflammatory skin diseases.Öğe Determining Total Protein and Bioactive Protein Concentrations in Bovine Colostrum(Journal of Visualized Experiments, 2021) Arslan, Ayşenur; Duman, Hatice; Kaplan, Merve; Uzkuç, Hasan; Bayraktar, Ayşe; Erturk, Melih; Alkan, Merve; Karav, SercanColostrum is a complex biological fluid produced by mammals immediately after parturition. It meets all the nutritional requirements for neonates as a good source of macro-and micronutrients, bioactive peptides, and growth factors. Bovine colostrum is also a potential source of nutrition and bioactive because of its rich protein content that includes immunoglobulin G (IgG) and lactoferrin. However, the level of lactoferrin and IgG in bovine colostrum changes markedly during the lactation period. Therefore, monitoring the concentration of IgG and lactoferrin for the use of bovine colostrum as a protein source is an important question to study. Methods in this article describe how to determine protein content, as well as specific concentrations of lactoferrin and IgG. These methods include the following steps: Isolation of bovine colostrum proteins, Determination of protein concentration via Bicinchoninic acid assay (BCA), Visualization of proteins via SDS-PAGE, Determination of lactoferrin, and IgG concentration using an ELISA Assay.Öğe Dietary Polyphenols, Food Processing and Gut Microbiome: Recent Findings on Bioavailability, Bioactivity, and Gut Microbiome Interplay(Mdpi, 2024) Sejbuk, Monika; Mironczuk-Chodakowska, Iwona; Karav, Sercan; Witkowska, Anna MariaPolyphenols are organic chemical compounds naturally present in plants, renowned for their anti-inflammatory, antioxidant, immunomodulatory, anticancer, and cardiovascular protective properties. Their bioactivity and bioavailability can vary widely depending on the methods of food processing and interactions with the gut microbiome. These factors can induce changes in polyphenols, affecting their ability to achieve their intended health benefits. Thus, it is essential to develop and apply food processing methods that optimize polyphenol content while maintaining their bioactivity and bioavailability. This review aims to explore how various food processing techniques affect the quantity, bioactivity, and bioavailability of polyphenols, as well as their interactions with the gut microbiome, which may ultimately determine their health effects.Öğe Distinguishing Turkish pine honey from multi-floral honey through MALDI-MS-based N-glycomics and machine learning(Springer, 2024) Masri, Saad; Aksoy, Sena; Duman, Hatice; Karav, Sercan; Kayili, Haci Mehmet; Salih, BekirHoney, a multifaceted blend of sugars, amino acids, vitamins, proteins, and minerals, exhibits compositional variability dependent upon the floral source. While previous studies have attempted to categorize honey, the use of glycomic profiles for honey classification remains an unexplored avenue. This investigation seeks to establish a methodology for distinguishing honey types, specifically multi-floral and pine honey, employing mass spectrometry-based glycomic analysis in tandem with machine learning. In this search, seven samples of pine honey and eight samples of multi-floral honey were obtained from diverse regions of Turkey. Subsequently, the proteins within these honey samples were extracted, and glycans were enzymatically released. The released glycans were labeled with 2-aminobenzoic acid (2-AA) and subjected to analysis via matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The glycan profiles of pine and multi-floral honey were determined through these analytical procedures, revealing a total of 76 distinct N-glycan structures. Among these, 13 N-glycan profiles consistently established at high levels across experimental replicates and were incorporated in subsequent analyses. Following the quantification of individual glycan abundances, statistically significant differences in glycan profiles were determined. Notably, N-glycans Hex5HexNAc2, Hex4HexNAc3, and Hex5HexNAc3 displayed considerable differences. Using the 13 N-glycan profiles, an accuracy rate of 93.5% was obtained from machine learning analysis, which increased to 100% when incorporating the identified significantly changed glycans. The most productive models were identified as subspace and fine k-nearest neighbors (KNN). The findings underscore the potential of mass spectrometry-based glycomics in conjunction with machine learning as a robust tool for precise honey type classification and its prospective utility in quality control and honey product authentication.Öğe Distinguishing Turkish pine honey from multi-foral honey through MALDI-MS-based N-glycomics and machine learning (vol 18, pg 5673, 2024)(Springer, 2024) Masri, Saad; Aksoy, Sena; Duman, Hatice; Karav, Sercan; Kayili, Haci Mehmet; Salih, Bekir[Anstract Not Available]Öğe Effect of statins on arterial wall inflammation as assessed by 18F-FDG PET CT: an updated systematic review and meta-analysis(BMC, 2024) Jamialahmadi, Tannaz; Reiner, Zeljko; Simental-Mendia, Luis E.; Almahmeed, Wael; Karav, Sercan; Eid, Ali H.; Giammarile, FrancescoBackgroundPathogenesis of atherosclerosis is largely mediated by inflammatory process. Statins are lipid-lowering drugs which also have anti-inflammatory effects. 18 fluorine radiolabeled fluorodeoxyglucose (18 F-FDG) positron emission tomography-computed tomography (PET-CT) is considered to be a good indicator of arterial wall inflammation. Therefore, in this meta-analysis the role of statins on inflammatory process in the artery wall was evaluated using this method since its actual validity for this purpose is not yet well established.MethodsPubMed, Scopus, Web of Science, ClinicalTrials.gov, and Google Scholar databases were searched using MESH terms and keywords. Funnel plot, Begg's rank correlation, and Egger's weighted regression tests evaluated publication bias in the meta-analysis. In cases where funnel plot asymmetry was observed, the trim and fill method was used to check the input of potentially missing studies.ResultsFindings of 10 clinical trials involving 373 subjects showed a remarkable reduction of arterial wall 18 F-FDG uptake according to target-to-background ratio (TBR) index after treatment with statins. Subgroup analysis showed a significant decrease in TBR with high-intensity and non-significant reduction of TBR with low-to-moderate-intensity statin therapy.ConclusionTreatment with statins suppressed arterial wall inflammation as shown by using 18 F-FDG PET-CT.Öğe Exploring the antioxidant properties of semaglutide: A comprehensive review(Elsevier Science Inc, 2024) Yaribeygi, Habib; Maleki, Mina; Forouzanmehr, Behina; Kesharwani, Prashant; Jamialahmadi, Tannaz; Karav, Sercan; Sahebkar, AmirhosseinPatients with diabetes commonly experience an aberrant production of free radicals and weakened antioxidative defenses, making them highly susceptible to oxidative stress development. This, in turn, can induce and promote diabetic complications. Therefore, utilizing antidiabetic agents with antioxidative properties can offer dual benefits by addressing hyperglycemia and reducing oxidative damage. Semaglutide, a recently approved oral form of glucagon-like peptide-1 (GLP-1) analogues, has shown potent antidiabetic effects. Additionally, recent studies have suggested that it possesses antioxidative properties. However, the exact effects and the molecular pathways involved are not well understood. In this review, we present the latest findings on the antioxidative impacts of semaglutide and draw conclusions about the mechanisms involved.Öğe Exploring the diverse biological significance and roles of fucosylated oligosaccharides(Frontiers Media Sa, 2024) Pekdemir, Burcu; Karav, SercanLong since, carbohydrates were thought to be used just as an energy source and structural material. However, in recent years, with the emergence of the field of glycobiology and advances in glycomics, much has been learned about the biological role of oligosaccharides, a carbohydrate polymer containing a small number of monosaccharides, in cell-cell interaction, signal transduction, immune response, pathogen adhesion processes, early embryogenesis, and apoptosis. The function of oligosaccharides in these processes is diversified by fucosylation, also known as modification of oligosaccharides. Fucosylation has allowed the identification of more than 100 different oligosaccharide structures that provide functional diversity. ABO blood group and Lewis antigens are among the best known fucosyl-linked oligosaccharides. In addition, the antigens in the ABO system are composed of various sugar molecules, including fucosylated oligosaccharides, and Lewis antigens are structurally similar to ABO antigens but differ in the linkage of sugars. Variation in blood group antigen expression affects the host's susceptibility to many infections. However, altered expression of ABO and Lewis antigens is related with prognosis in carcinoma types. In addition, many pathogens recognize and bind to human tissues using a protein receptor with high affinity for the fucose molecule in glycoconjugates, such as lectin. Fucosylated oligosaccharides also play vital roles during fertilization and early embryogenesis. Learning and memory-related processes such as neurite growth, neurite migration, and synapse formation seen during the development of the brain, which is among the first organs to develop in embryogenesis, are regulated by fucosylated oligosaccharides. In conclusion, this review mentions the vital roles of fucosylated oligosaccharides in biology, drawing attention to their importance in the development of chemical tools to be used in function analysis and the investigation of various therapeutic targets.
