Browsing by Author "Aljofan M."

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    Establishment and validation of mare’s milkderived exosomes extraction method
    (Springer, 2022) Aljofan M.; Issayev A.; Sergazy S.; Zhetkenev S.
    Exosomes are nanosized (30-150nm) extracellular vesicles with double layer lipid membrane, that present in milk of farm animals. These vesicles maintain endocrine, paracrine and autocrine signaling. They produced by parental cell as major substance of cell-cell communications. Their main physiological function is to transmit cellular signals and are capable of carrying big and charged molecules, which otherwise would not be able to penetrate the plasma membrane
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    ItemOpen Access
    Investigating the Suitability of Mare’s Milk-Derived Exosomes as Potential Drug Carriers.
    (MDPI, 2024) Sergazy, S.; Zhetkenev, S; Shulgau, Z.; Chulenbayeva, L.; Kamyshanskiy, Y.; Nurgaziyev, M.; Nurgozhina, A.; Mukhanbetzhanova, Z.; Berikkhanova, K.; Gulyayev, A.; Aljofan M.
    Exosomes are cell-derived, membrane-surrounded particles that deliver bioactive molecules to various cells. Due to their small size, low immunogenicity, extended blood circulation, and involvement in cellular communication, they hold potential as effective drug carriers. Exosomes are present in various biological fluids, including mare’s milk, a traditional drink in Central Asia. This study aims to compare exosome isolation methodologies and determine the stability of mare’s milk-derived exosomes as potential therapeutic carriers. Three extraction methods—immunoprecipitation, size exclusion chromatography, and total exosome isolation—were compared in terms of exosome characteristics, purity, and content. The isolated exosomes were then loaded with quercetin, and their ability to increase its bioavailability was tested in vitro and in vivo. Total exosome isolation was identified as the most efficient method for producing high-quality exosomes. These exosomes were loaded with quercetin and compared to free quercetin and exosomes alone. Exosomes loaded with 80 µM quercetin significantly restored β-galactosidase activity and cellular viability in doxorubicin-treated cells, exhibiting similar potency to 160 µM free quercetin. In aged model animals, treatment with quercetin-loaded exosomes resulted in significantly less acute and subacute damage to the myocardium, kidneys, and liver compared to untreated control animals. This study provides a proof-of-concept that mare’s milk-derived exosomes can be effectively absorbed by cells and animal tissues, supporting their potential use as drug carriers.