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Kim, Yu J.,Kim, Ju‐,Young,Yoon, Jin Y.,Kyung, Sun Y.,Lee, Sang P.,Jeong, Sung H.,Moon, Chanil,Park, Jeong‐,Woong Blackwell Publishing Ltd 2011 Basic & clinical pharmacology & toxicology Vol.109 No.1
<P><B>Abstract: </B> Cigarette smoking is the principal cause of chronic obstructive pulmonary disease (COPD), especially emphysema, which is characterized by alveolar wall destruction and airspace enlargement. Apoptosis of lung structural cells is involved in the pathogenesis of COPD. Xanthine derivatives (aminophylline or theophylline) have been used for the treatment of COPD as a bronchodilator. But the effects of xanthine derivatives on apoptosis of the lung structural cells remain poorly understood, even though it is known that theophylline protects against ultraviolet irradiation–induced cell death in corneal epithelial cells. This study was designed to determine whether aminophylline would protect against cigarette smoke extract (CSE)–induced apoptosis in lung fibroblasts. We demonstrated that aminophylline protected against apoptosis of MRC‐5 cells at a relatively lower therapeutic range (10 μg/ml), resulting in a significant increase in cell viability occurring at 20% concentration after 8‐hr exposure. Annexin staining decreased from 68 ± 4% of the control to 12 ± 2% of aminophylline (10 μg/ml) pre‐treatment after 20% CSE exposure for 12 hr (<I>p </I><<I> </I>0.05). Aminophylline decreased caspase 3 and 8 activities and nuclear condensation or fragmentation in MRC‐5 cells after exposure to 20% CSE for 12 hr compared with control and high levels of aminophylline (>50 μg/ml) pre‐treatment. These findings suggest that aminophylline protected apoptosis of MRC‐5 cells through the inactivation of caspases 3 and 8 and could be an effective agent to reduce cigarette smoking–induced lung structural cell apoptosis.</P>
Expression of Nesfatin-1/NUCB2 and Its Binding Site in Mouse Testis and Epididymis
Jinhee Kim,Hyunsook Kim,Sumin Kim,Hyejin Yang,Hyunhae Cho,Supyong Hwang,Chanil Moon,양현원 한국발생생물학회 2011 발생과 생식 Vol.15 No.3
Nesfatin-1/NUCB2, which is secreted from the brain, is known to control appetite and energy metabolism. Recent studies have been shown that nesfatin-1/NUCB2 was expressed not only in the brain, but it was also expressed in the gastric organs and adipose tissue. However, little is known about the expression of nesfatin-1/NUCB2 in the male reproductive system. Therefore, we examined whether the nesfatin-1/NUCB2 and its binding site exists in the male reproductive organs. Nesfatin-1/NUCB2 mRNA and protein were detected in the mouse testis and epididymis by PCR and Western blot analysis. As a result of the immunohistochemistry staining, the nesfatin-1 protein was localized at the interstitial cells and Leydig cells in the testis. Nesfatin-1 binding sites were also displayed at boundary cells in the tunica albuginea. Furthermore, in order to examine if the expression of nesfatin-1/NUCB2 mRNA in the testis and epididymis were affected by gonadotropin, its mRNA expression was analyzed after PMSG administration into mice. NUCB2 mRNA expression levels were increased in both of the testis and epididymis after PMSG administration. These results demonstrated for the first time that nesfatin-1 and its binding site were expressed in the mouse testis and epididymis. In addition,nesfatin-1/NUCB2 mRNA expression was controlled by gonadotropin, suggesting a possible role of nesfatin-1 in the male reproductive organs as a local regulator. Due to this, further study is needed to elucidate the functions of nesfatin-1 on the male reproductive system.
분자동력학을 이용한 나노 리소그래피 공정의 결정립계의 변형 거동 연구
김찬일(Chanil Kim),현상일(Sangil Hyun),김영석(Youngsuk Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Large-scale molecular dynamics simulations are performed to verify the deformation characteristics of grain boundaries in nanolithography process. The copper substrate made of 200,000 atoms is constructed by two grains in different crystal orientations using dynamic relaxation method. The grain boundary is located in the middle of the substrate with 45~135 degree angles. The plowing tip is made of diamond-like-carbon atoms in a variety of shapes. In the simulations, the generation, propagation, and accumulation of dislocations are observed inside the substrate. From the numerical results, we address the dynamic behavior of the grain boundaries as well as the frictional characteristics in terms of the morphology of initial grain boundaries.
Enumeration of CD34-positive Stem Cells Using the ADAMII Image-based Fluorescence Cell Counter
Yu, Haein,Yoo, Jaeeun,Hwang, Jung Sil,Kim, Mikyung,Bae, Kyung Hee,Jekarl, Dong Wook,Oh, Jong Hyun,Lee, Ji Yeon,Han, Sunmi,Chung, Chanil,Kim, Myungshin,Kim, Yonggoo Korean Society for Laboratory Medicine (KAMJE) 2019 Annals of Laboratory Medicine Vol.39 No.4
An Efficient Predicate Encryption with Constant Pairing Computations and Minimum Costs
Kim, Intae,Hwang, Seong Oun,Park, Jong Hwan,Park, Chanil IEEE 2016 IEEE TRANSACTIONS ON COMPUTERS - Vol.65 No.10
<P>Predicate encryption is a public-key encryption that supports attribute-hiding as well as payload-hiding and achieves high flexibility in terms of access control. Since Katz, Sahai, and Waters first proposed the predicate encryption scheme in 2008, several predicate encryption schemes have been published. Unfortunately these are impractical as they require O(n) pairing computations for decryption with considerably large sized public parameters, secret key, and ciphertext, where n is the dimension of the attribute/predicate vectors. In this paper, we propose a very efficient predicate encryption scheme that requires only n exponentiation plus three pairing computations for decryption with shorter sized public parameters, secret key, and ciphertext. The proposed scheme is proven selective attribute-secure against chosen-plaintext attacks in the standard model under the Asymmetric Decisional Bilinear Diffie-Hellman assumptions.</P>