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Clinical and biological implications of CD133-positive and CD133-negative cells in glioblastomas.
Joo, Kyeung Min,Kim, Shi Yean,Jin, Xun,Song, Sang Yong,Kong, Doo-Sik,Lee, Jung-Ii,Jeon, Ji Won,Kim, Mi Hyun,Kang, Bong Gu,Jung, Yong,Jin, Juyoun,Hong, Seung-Chyul,Park, Woong-Yang,Lee, Dong-Sup,Kim, H United States and Canadian Academy of Pathology [e 2008 Laboratory investigation Vol.88 No.8
<P>A number of recent reports have demonstrated that only CD133-positive cancer cells of glioblastoma multiforme (GBM) have tumor-initiating potential. These findings raise an attractive hypothesis that GBMs can be cured by eradicating CD133-positive cancer stem cells (CSCs), which are a small portion of GBM cells. However, as GBMs are known to possess various genetic alterations, GBMs might harbor heterogeneous CSCs with different genetic alterations. Here, we compared the clinical characteristics of two GBM patient groups divided according to CD133-positive cell ratios. The CD133-low GBMs showed more invasive growth and gene expression profiles characteristic of mesenchymal or proliferative subtypes, whereas the CD133-high GBMs showed features of cortical and well-demarcated tumors and gene expressions typical of proneuronal subtype. Both CD133-positive and CD133-negative cells purified from four out of six GBM patients produced typical GBM tumor masses in NOD-SCID brains, whereas brain mass from CD133-negative cells showed more proliferative and angiogenic features compared to that from CD133-positive cells. Our results suggest, in contrast to previous reports that only CD133-positive cells of GBMs can initiate tumor formation in vivo CD133-negative cells also possess tumor-initiating potential, which is indicative of complexity in the identification of cancer cells for therapeutic targeting.</P>
Kim, Hyun-Ii,Choi, Woong-Ki,Oh, Sang-Yub,Seo, Min-Kang,Park, Soo-Jin,An, Kay-Hyeok,Lee, Young Sil,Kim, Byung-Joo American Scientific Publishers 2014 Journal of Nanoscience and Nanotechnology Vol.14 No.12
<P>In this work, oxyfluorination treatments on carbon fiber surfaces were carried out to improve the interfacial adhesion between carbon fibers and polarized-polypropylene (P-PP). The surface properties of oxyfluorinated carbon fibers were characterized using a single fiber contact angle, and X-ray photoelectron spectroscopy. The mechanical properties of the composites were calculated in terms of work of adhesion between fibers and matrices and also measured by a critical stress intensity factor (K(IC)). The K(IC) of oxyfluorinated carbon fibers-reinforced composites showed higher values than those of as-received carbon fibers-reinforced composites. The results showed that the adhesion strength between the carbon fibers and P-PP had significantly increased after the oxyfluorination treatments. As the theoretical and practical comparisons, OF-CF-60s showed the best mechanical interfacial performance due to the good surface free energy. This indicates that oxyfluorination produced highly polar functional groups on the fiber surface, resulting in strong adhesion between carbon fibers and P-PP in this composite system.</P>
귓볼 켈로이드의 수술 후 보조요법에 따른 재발률에 대한 비교 연구
김희주 ( Hee Joo Kim ),정성규 ( Sung Kyu Jung ),이경구 ( Kyung Goo Lee ),김재환 ( Jae Hwan Kim ),김일환 ( Ii Hwan Kim ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.9
Background: Earlobe keloids are a cosmetically and symptomatically bothersome clinical problem with frequent recurrence despite various treatments including surgical excision and intralesional injection of corticosteroids. Objective: The aim of this study was to compare the results and recurrence of earlobe keloids after various postexcisional adjuvant therapies and to identify the most effective postoperation adjuvant therapy. Methods: We retrospectively evaluated 36 patients with earlobe keloids (n=71) who underwent core excision and a suprakeloidal flap using photographs. One group did not have adjuvant therapy, one group was treated with adjuvant triamcinolone intralesional injection (TRA/ILI), and another group was treated with postoperative irradiation. Results: Among treated 71 keloids, 18 lesions (25.4%) recurred; 42.9% (12/28) of the operation-only group and 19.4% (6/31) of TRA/ILI group showed recurrence. The adjuvant radiation therapy group had no recurrence. The difference in recurrence rate was statistically significant. Conclusion: Postexcisional adjuvant therapy was more effective than excision monotherapy for keloid treatment, and radiation therapy had more sustained effects than that of TRA/ILI.
On the Characteristics of Form Factors (Series 60, C<SUB>B</SUB>=0.60)
Hun Chol Kim(김훈철),Seung II Yang(양승일),Eun Chan Kim(김은찬),Kuk Jin Kang(강국진),Suakho Van(반석호),Young-Gill Lee(이영길),Yoon-Ho Kim(김윤호),Kwi-Joo Lee(이귀주),Young Ki Kwak(곽영기),Soon Won Joa(좌순원),Hyochul Kim(김효철),Wu 대한조선학회 1988 大韓造船學會誌 Vol.25 No.4
김기호 ( Ki Ho Kim ),김기수 ( Ki Soo Kim ),김영희 ( Young Heui Kim ),고강일 ( Kang Ii Ko ),박선희 ( Sun Hee Park ),김진국 ( Jin Guk Kim ),최현진 ( Hyun Jin Chio ),고수연 ( Su Yeon Ko ),배윤주 ( Yoon-joo Bae ),김용민 ( Yong-min Kim 대한화장품학회 2006 대한화장품학회지 Vol.32 No.2
피부 각질층내의 아미노산 조성비율과 유사한 조성비로 amino acid complex을 제조하고, 제조된 amino acid complex가 피부에 미치는 영향을 알아보기 위해 세포 생존율, TIMP-1 발현 증가율, 보습 및 각질량 변화를 측정하였다. 연구 결과 amino acid complex는 독성이 없는 안전한 물질로 우수한 보습력 및 보습유지효과와 ascorbic acid와 유사한 TIMP-1 발현량 증가로 주름 예방 및 개선에 효과를 가지고 있으며, 각질량 감소 및 감소유지효과로 자극이 있는 AHA 대체 물질로의 가능성을 보였다. 따라서, amino acid complex는 다기능을 가진 노화방지 화장료 기능성분으로 유용하게 사용될 수 있음을 확인하였다. Amino acid complex was made with the composition of amino acids quite similar to that of stratum corneum on the skin. In order to evaluate the efficacy of amino acid complex on the skin as an active cosmetic ingredient, we measured cytotoxicity. TIMP-1 expression, moisturizing effect and the amount of horny substance. In cytotoxicity assay, amino acid complex did not show any cytotoxicity. In moisturizing effect test using corneometer, it showed very good moisturizing effect. In TIMP-1 mRNA assay using RT-PCR, moo acid complex showed the increase of TIMP-1 expression, suggesting that amino acid complex have anti-wrinkle effect. Therefore, amino acid complex may be useful as an active ingredient for anti-aging.