이정미 교수

ABSTRACT Osteoarthritis (OA) is a chronic degenerative disease of articular cartilage that is the most common joint disease worldwide. Mesenchymal stem cells (MSCs) have been the most extensively explored for the treatment of OA. Recently, it has been demonstrated that MSC‐derived extracellular vesicles (EVs) may contribute to the potential mechanisms of MSC‐based therapies. In this study, we investigated the therapeutic potential of human adipose‐derived stem cells EVs (hASC‐EVs) in alleviating

Osteoporosis is one of the most common skeletal disorders caused by the imbalance between bone formation and resorption, resulting in quantitative loss of bone tissue. Since stem cell-derived extracellular vesicles (EVs) are growing attention as novel cell-free therapeutics that have advantages over parental stem cells, the therapeutic effects of EVs from adipose tissue-derived stem cells (ASC-EVs) on osteoporosis pathogenesis were investigated. ASC-EVs were isolated by a multi-filtration system

Increased O -GlcNAcylation can confer neuroprotective effects against necroptosis in the context of Alzheimer’s disease.

Effective intracellular delivery of therapeutic proteins can potentially treat a wide array of diseases. However, efficient delivery of functional proteins across the cell membrane remains challenging. Exosomes are nanosized vesicles naturally secreted by various types of cells and may serve as promising nanocarriers for therapeutic biomolecules. Here, we engineered exosomes equipped with a photoinducible cargo protein release system, termed mMaple3-mediated protein loading into and release from

Deep eutectic solvents (DESs) were investigated as tunable, environmentally benign, yet superior extraction media to enhance the extraction of anthocyanins from grape skin, which is usually discarded as waste. Ten DESs containing choline chloride as hydrogen bond acceptor combined with different hydrogen bond donors were screened for high extraction efficiencies based on the anthocyanin extraction yields. As a result, citric acid, D- (?)-maltose, and fructose were selected as the effective DES c

Mitochondrial dysfunction and oxidative stress are frequently observed in the early stages of Alzheimer's disease (AD). Studies have shown that presenilin-1 (PS1), the catalytic subunit of γ-secretase whose mutation is linked to familial AD (FAD), localizes to the mitochondrial membrane and regulates its homeostasis. Thus, we investigated how five <i>PS1</i> mutations (A431E, E280A, H163R, M146V, and Δexon9) observed in FAD affect mitochondrial functions. <b>Methods:</b> We used H4 glioblastoma

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) entry is mediated by the interaction of the viral spike (S) protein with angiotensin-converting enzyme 2 (ACE2) on the host cell surface. Although a clinical trial testing soluble ACE2 (sACE2) for COVID-19 is currently ongoing, our understanding of the delivery of sACE2 via small extracellular vesicles (sEVs) is still rudimentary. With excellent biocompatibility allowing for the effective delivery of molecular cargos, sEVs are broadly

The aim of this study was to investigate theimpact of CYP2C9*1/*3 genotype on the pharmacokineticsof flurbiprofen and its metabolite. The CYP2C9 genotypeswere determined with the use of polymerase chain reactionand restriction fragment and DNA sequencing analysis in358 healthy Koreans. Among them, twenty individualswith CYP2C9*1/*1 (n = 12) or CYP2C9*1/*3 (n = 8)genotypes received a single 40 mg oral dose of flurbiprofen. The plasma concentrations of flurbiprofen and itsmetabolite, 40-hydroxyflu

, 2012 ). Excessive ROS production over cellular antioxidant capacity induces oxidative stress which results in harmful effects such as cell and tissue damage. Sufficient evidence suggests that oxidative stresses are involved in cancers, cardiovascular disease, and neurodegenerative diseases including Alzheimer's disease and Parkinson disease (Waris and Ahsan, 2006). Though excessive level of ROS triggers detrimental effects, ROS also have been implicated to regulate cellular processes. Since RO

The inherent vulnerability of protein biologics to high temperature is the origin of their limited use in clinical settings where proper storage and handling systems are not available. Herein, we demonstrate the first application of natural deep eutectic solvents (NADES) as a temperature-stable storage medium for a real therapeutic protein, human interferon-alpha 2 (IFN-α2). A formulation of IFN-α2 based on a NADES composed of choline chloride and fructose at a 1:1 molar ratio (CCl:Fru) had no i

Systemic sclerosis is an autoimmune disease characterized by inflammatory reactions and fibrosis. Myofibroblasts are considered therapeutic targets for preventing and reversing the pathogenesis of fibrosis in systemic sclerosis. Although the mechanisms that differentiate into myofibroblasts are diverse, transforming growth factor β (TGF-β) is known to be a key mediator of fibrosis in systemic sclerosis. This study investigated the effects of extracellular vesicles derived from human adipose stem

A reliable analytical method based on highperformanceliquid chromatography-ultraviolet detectionwas established for the determination of oleanonic acid(OA) content in Chios gum mastic (CGM). A simplemethod involving methanol extraction of CGM powderfollowed by basification and ether extraction was developedto isolate the triterpenic fraction including OA. Thetriterpenic fraction was chromatographed on a PhenomenexGemini C18 column (150 9 4.6 mm, 5 lm) under asimple gradient elution of a mobile p