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Corn Silk Extract Prevents Carrageenan-Induced Inflammatory Edema
Kim Yonghwan,Han Na Choi,Kim Taehee,Kim Su Jin,Kim Yuna,Kim Jin Soo,Lee Sang-Hoon,Goo Young-Tae,Kim Dong Woon,Do Lee Sang 건강기능식품미래포럼 2022 건강기능식품미래포럼 학술지 Vol.2 No.1
Corn silk extract (CSE) has been used as a traditional medicine for edema, cystitis, gout, kidney stones, nephritis, and prostatitis. Although CSE has been shown to be effective against oxidative stress and diabetes, the effects of CSE on peripheral edema are unclear. Therefore, in this study, the effects of CSE on carrageenan-induced peripheral edema in the hind paw of mice were examined. CSE administered orally for a week suppressed the formation of edema and inhibited the swelling of epidermis and the infiltration of inflammatory cells into the dermis. To explore the mechanism of the anti-inflammatory action, CSE was tested on the adhesion between monocytes and endothelial cells using THP-1 cells (a monocyte cell line) and human umbilical vein endothelial cells (HUVECs). CSE inhibited the adhesion only when THP-1 cells were treated with CSE but not HUVECs. This finding suggests that CSE possibly influences the expressions of the membrane proteins of the monocyte involved in the adhesion with endothelial cells. Thus, CSE was treated for 24 hours and the expressions of CD11a, CD11b, CD18, CD49d and CD162 using its respective antibody and flowcytometry. Of these proteins, CD162, also known as P-selectin glycoprotein ligand-1 (PSGL-1), was shown to be reduced in its expression. PSGL-1 is known to be required for the binding of inflammatory cells to intercellular adhesion molecules of endothelial cells. In conclusion, CSE may suppress inflammatory edema by inhibiting the binding of inflammatory cells to the vascular endothelium.
Kim, Kook Hwan,Jeong, Yeon Taek,Oh, Hyunhee,Kim, Seong Hun,Cho, Jae Min,Kim, Yo-Na,Kim, Su Sung,Kim, Do Hoon,Hur, Kyu Yeon,Kim, Hyoung Kyu,Ko, TaeHee,Han, Jin,Kim, Hong Lim,Kim, Jin,Back, Sung Hoon,Ko Nature Publishing Group, a division of Macmillan P 2013 Nature medicine Vol.19 No.1
Despite growing interest and a recent surge in papers, the role of autophagy in glucose and lipid metabolism is unclear. We produced mice with skeletal muscle–specific deletion of Atg7 (encoding autophagy-related 7). Unexpectedly, these mice showed decreased fat mass and were protected from diet-induced obesity and insulin resistance; this phenotype was accompanied by increased fatty acid oxidation and browning of white adipose tissue (WAT) owing to induction of fibroblast growth factor 21 (Fgf21). Mitochondrial dysfunction induced by autophagy deficiency increased Fgf21 expression through induction of Atf4, a master regulator of the integrated stress response. Mitochondrial respiratory chain inhibitors also induced Fgf21 in an Atf4-dependent manner. We also observed induction of Fgf21, resistance to diet-induced obesity and amelioration of insulin resistance in mice with autophagy deficiency in the liver, another insulin target tissue. These findings suggest that autophagy deficiency and subsequent mitochondrial dysfunction promote Fgf21 expression, a hormone we consequently term a 'mitokine', and together these processes promote protection from diet-induced obesity and insulin resistance.
Kim Taehee,Choi Hayoung,Kim Sang Hyuk,Yang Bumhee,Han Kyungdo,Jung Jin-Hyung,Kim Bo-Guen,Park Dong Won,Moon Ji Yong,Kim Sang-Heon,Kim Tae-Hyung,Yoon Ho Joo,Shin Dong Wook,Lee Hyun 대한의학회 2024 Journal of Korean medical science Vol.39 No.11
Background: Tuberculosis (TB) survivors have an increased risk of developing chronic obstructive pulmonary disease (COPD). This study assessed the risk of COPD development and COPD-related hospitalization in TB survivors compared to controls. Methods: We conducted a population-based cohort study of TB survivors and 1:1 age- and sex-matched controls using data from the Korean National Health Insurance Service database collected from 2010 to 2017. We compared the risk of COPD development and COPD-related hospitalization between TB survivors and controls. Results: Of the subjects, 9.6% developed COPD, and 2.8% experienced COPD-related hospitalization. TB survivors had significantly higher COPD incidence rates (36.7/1,000 vs. 18.8/1,000 person-years, P < 0.001) and COPD-related hospitalization (10.7/1,000 vs. 4.3/1,000 person-years, P < 0.001) than controls. Multivariable Cox regression analyses revealed higher risks of COPD development (adjusted hazard ratio [aHR], 1.63; 95% confidence interval [CI], 1.54–1.73) and COPD-related hospitalization (aHR, 2.03; 95% CI, 1.81–2.27) in TB survivors. Among those who developed COPD, the hospitalization rate was higher in individuals with post-TB COPD compared to those with non-TB COPD (10.7/1,000 vs. 4.9/1,000 person-years, P < 0.001), showing an increased risk of COPD-related hospitalization (aHR, 1.84; 95% CI, 1.17–2.92). Conclusion: TB survivors had higher risks of incident COPD and COPD-related hospitalization compared to controls. These results suggest that previous TB is an important COPD etiology associated with COPD-related hospitalization.
Kim, Taeki,Kim, Junhyung,Choi, Jaehoon,Jo, Taehee,Shin, Hyeong Chan,Jeong, Woonhyeok Korean Cleft Palate-Craniofacial Association 2021 Archives of Craniofacial Surgery Vol.22 No.2
The use of a fibula osteocutaneous flap is currently the mainstay of segmental mandibular reconstruction. This type of flap is used to treat tumors, trauma, or osteoradionecrosis of the mandible. However, a fibula osteocutaneous flap may also be a good option for reconstructing the mandible to preserve oropharyngeal function and facial appearance in cases of pathological fracture requiring extensive segmental bone resection. Chronic osteomyelitis is one of the various causes of subsequent pathologic mandibular fractures; however, it is rare, and there have been few reports using free flaps in osteomyelitis of the mandible. We share our experience with a 76-year-old patient who presented with a pathologic fracture following osteomyelitis of the mandible that was reconstructed using a fibula osteocutaneous flap after wide segmental resection.
Orientation Control of Block Copolymer Thin Films Placed on Ordered Nanoparticle Monolayers
Kim, Taehee,Wooh, Sanghyuk,Son, Jeong Gon,Char, Kookheon American Chemical Society 2013 Macromolecules Vol.46 No.20
<P>We investigate orientation and lateral ordering of poly(styrene-<I>block</I>-methyl methacrylate) (PS-<I>b</I>-PMMA) diblock copolymer (diBCP) thin films placed on ordered nanoparticle (NP) monolayers. The densely packed NP monolayers were prepared on silicon substrates with the Langmuir–Blodgett (LB) deposition technique. The perpendicular domain orientation of BCP thin films is obtained on the ordered NP monolayers due to the nanoscale regular roughness which exerts the elastic deformation on the BCP nanodomains and suppresses the substrate-induced parallel orientation. The effect of BCP film thickness as well as the NP size on the orientation of BCP nanodomains was systematically investigated. We also demonstrate the defect-tolerant ordering of the perpendicular orientation of BCP thin films on the NP-vacant sites.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/mamobx/2013/mamobx.2013.46.issue-20/ma401601f/production/images/medium/ma-2013-01601f_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ma401601f'>ACS Electronic Supporting Info</A></P>
Introduction: Ontology of Movement as a Framework for the Mobility Studies
Taehee Kim Academy of Mobility Humanities 2023 Mobility Humanities Vol.2 No.1
It has been almost two decades since “a whole new kinetic paradigm" or “a new paradigm defined by motion,” mentioned in the epigraph quoted above, was brought to light in the name of the "new mobilities paradigm" (Sheller and Urry 207). This inauguration of the paradigm was arguably the result of "an almost/not quite ontology which is gradually gathering momentum around the key trope of 'mobility'" (Thrift 258). Needless to say, there has been no lack of criticism and resistance to this paradigm. For instance, critics discerned that "if mobility is everything," as is often assumed to be the case in this paradigm, "then it is nothing," since the difference between mobility and immobility and among diverse types of mobility cannot be discerned and, consequently, mobility has no explanatory power (Adey 75). More radically, it was criticised that every vocabulary of this research program's name, "new mobilities paradigm," qualifying it as “new,” focussing on “mobilities,” and designating it as a “paradigm,” was problematic (Cresswell, "Towards a Politics of Mobility" 18).
Discrimination, Social Connectedness, and Future Anxiety of First-Generation Korean Americans
Taehee Kim,Michael Brooks,Farren Stackhouse 한국상담학회 2021 Journal of Asia Pacific counseling Vol.11 No.2
This study investigated the relationship between perceived discrimination, perceptions about occupation, social connectedness to mainstream society, anxiety toward the future, and life satisfaction for first-generation Korean Americans. The data (N = 107) of the first-generation Korean American participants were analyzed using path analysis, focusing on mediating effects of social connectedness and anxiety about the relationship between perceived discrimination, perceptions about occupation, and life satisfaction. Our study results showed that perceived discrimination and perceptions about occupation are positively correlated to anxiety about the future but negatively correlated with a connectedness to mainstream society. In addition, demands of occupation, discrimination, and concern about the future were all negatively associated with life satisfaction. At the same time, first-generation Korean Americans’ social connectedness to mainstream society was positively associated with life satisfaction. According to the path analysis results, only perceptions about occupation were indirectly associated with life satisfaction via anxiety about the future. However, discrimination was not indirectly associated with life satisfaction via social connectedness to mainstream society and worry about the future.