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Isolation and characterization of a novel H9N2 influenza virus in Korean native chicken farm.
Lee, Yu-Na,Lee, Dong-Hun,Park, Jae-Keun,Lim, Tae-Hyun,Youn, Ha-Na,Yuk, Seong-Su,Lee, Youn-Jeong,Mo, In-phil,Sung, Haan-Woo,Lee, Joong-Bok,Park, Seung-Yong,Choi, In-Soo,Song, Chang-Seon American Association of Avian Pathologists [etc.] 2011 Avian diseases Vol.55 No.4
<P>An outbreak of avian influenza, caused by an H9N2 low-pathogenic avian influenza virus (AIV), occurred in a chicken farm and caused severe economic losses due to mortality and diarrhea. AIV was isolated and identified in a sample from an affected native Korean chicken. Genetic analysis of the isolate revealed a high sequence similarity to genes of novel reassortant H9N2 viruses isolated from slaughterhouses and live bird markets in Korea in 2008 and 2009. Animal challenge studies demonstrated that the replication kinetics and pathogenicity of the isolate were considerably altered due to adaptation in chickens. Vaccine protection studies indicated that commercial vaccine was not able to prevent virus shedding and clinical disease when chickens were challenged with the isolate. These results suggest that the novel H9N2 virus possesses the capacity to replicate efficiently in the respiratory system against vaccination and to cause severe disease in domestic chickens. The results also highlight the importance of appropriate updating of vaccine strains, based on continuous surveillance data, to prevent the possibility of a new H9N2 epidemic in Korea.</P>
( Mi Ran Jo ),( Mi Hee Park ),( Dong Young Choi ),( Dong Yeun Yuk ),( Yuk Mo Lee ),( Jin Moo Lee ),( Jae Hwang Jeong ),( Ki Wan Oh ),( Moon Soon Lee ),( Sang Bae Han ),( Jin Tae Hong ) 한국응용약물학회 2011 Biomolecules & Therapeutics(구 응용약물학회지) Vol.19 No.3
Amyloid beta (Aβ)-induced neurotoxicity is a major pathological mechanism of Alzheimer`s disease (AD). In this study, we investigated the inhibitory effect of L-theanine, a component of green tea (Camellia sinensis) on Aβ1-42-induced neurotoxicity and oxidative damages of macromolecules. L-theanine inhibited Aβ1-42-induced generation of reactive oxygen species, and activation of extracellular signal-regulated kinase and p38 mitogenic activated protein kinase as well as the activity of nuclear factor kappa- B. L-theanine also significantly reduced oxidative protein and lipid damage, and elevated glutathione level. Consistent with the reduced neurotoxic signals, L-theanine (10-50 μg/ml) concomitantly attenuated Aβ1-42 (5 μM)-induced neurotoxicity in SK-N-MC and SK-N-SH human neuroblastoma cells. These data indicate that L-theanine on Aβ-induced neurotoxicity prevented oxidative damages of neuronal cells, and may be useful in the prevention and treatment of neurodegenerative disease like AD.
Yuk, Jong Min,Kim, Kwanpyo,Alemá,n, Benjamí,n,Regan, William,Ryu, Ji Hoon,Park, Jungwon,Ercius, Peter,Lee, Hyuck Mo,Alivisatos, A. Paul,Crommie, Michael F.,Lee, Jeong Yong,Zettl, Alex American Chemical Society 2011 NANO LETTERS Vol.11 No.8
<P>We report a new and highly versatile approach to artificial layered materials synthesis which borrows concepts of molecular beam epitaxy, self-assembly, and graphite intercalation compounds. It readily yields stacks of graphene (or other two-dimensional sheets) separated by virtually any kind of “guest” species. The new material can be “sandwich like”, for which the guest species are relatively closely spaced and form a near-continuous inner layer of the sandwich, or “veil like”, where the guest species are widely separated, with each guest individually draped within a close-fitting, protective yet atomically thin graphene net or veil. The veils and sandwiches can be intermixed and used as a two-dimensional platform to control the movements and chemical interactions of guest species.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2011/nalefd.2011.11.issue-8/nl201647p/production/images/medium/nl-2011-01647p_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P>
Jang, Hoon,Kim, Su Jin,Yuk, Seung Mo,Han, Dong Seok,Ha, U-Syn,Hong, Sung Hoo,Lee, Ji Yeol,Hwang, Tae Kon,Hwang, Seong Yeon,Kim, Sae Woong Commonwealth Scientific and Industrial Research Or 2012 Reproduction, fertility, and development Vol.24 No.5
<P>Varicocele is the most common cause of primary male infertility and is associated with oxidative stress. The aim of the present study was to investigate the effects of anthocyanin on a rat model of varicocele. Twenty-four male rats were divided into four experimental groups: a normal control group, a varicocele-induced control group and two varicocele-induced groups treated with either 40 or 80mgkg(-1), p.o., anthocyanin for 4 weeks. Varicocele was induced by the partial obstruction of the left renal vein. After 8 weeks, the testes and epididymides from rats in all groups were removed, weighed and subjected to histological examination and semen analysis. Apoptosis in the testes was determined by terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end-labelling (TUNEL) and oxidative stress was assessed by measuring 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels. Although no significant differences in sperm counts were observed among the groups, anthocyanin treatment of the varicocele-induced groups resulted in significantly increased testes weight, sperm motility and spermatogenic cell density (P<0.05). Anthocyanin treatment also significantly decreased apoptotic body count and 8-OHdG concentrations (P<0.05). We suggest that the antioxidant effect of anthocyanin prevented the damage caused by varicocele-induced reactive oxygen species.</P>
The Double-Layered Microsphere: Encapsulation of Water-Soluble Protein with PLGA
Ko, Jong Tae,Jung, Hyung Joon,Mo, Jong Hyon,Cho, Jae Song,Yuk, Soon Hong,Shin, Hyung Shik,Kim, Moon Suk,Rhee, John M.,Lee, Hai Bang,Khang, Gil Son Trans Tech Publications, Ltd. 2007 Key Engineering Materials Vol.342-343 No.-
<P>The double-layered microspheres play an important role in controlling drug delivery for pharmaceutical application, because of the low initial burst compared with single-layered spheres and targetable delivery to specific organ. But it has drawback in loading drug and controlling size. In this study, we developed double-layered spheres using relatively simple oil-in-water (O/W) solvent evaporation method using bovine serum albumin (BSA) as water-soluble protein and poly(D,L-lactide-co-glycolide) (PLGA). BSA/PLGA double-layered microspheres were fabricated using O/W solvent evaporation method and investigated the specific character of double-layered microspheres according to the kind of surfactants. In SEM observation, double layered microsphere had spherical shape and smooth surface without pores. And the double layered microsphere using O/W solvent evaporation method was transparency because of slow evaporation of solvent. In fluorescent observation, we observed the fluorescent core in the double-walled spheres composed of FITC-BSA and PLGA using fluorescent observation. In the case of polyvinylalcohol as emulsifier, the yield was better than gelatin. As decreased concentration of PLGA, the size of double-layered microspheres deceased.</P>
Transumbilical pure single-port laparoscopic donor nephrectomy
Joo Mee Kim,Won Jun Jeong,Byung Jo Choi,Seung Mo Yuk,Jeong Kye Hwang,Sang Chul Lee 대한외과학회 2015 Annals of Surgical Treatment and Research(ASRT) Vol.89 No.5
Transumbilical single-port laparoscopic donor nephrectomy (SPLDN) is a novel, rapidly evolving, minimally invasive treatment modality for kidney transplantation. This method causes minimal parietal injury, has cosmetic advantages, and allows rapid recovery because of low postoperative pain and short hospital stay. Like other abdominal surgeries, when conducted by experienced laparoscopic surgeons, it can meet the same graft requirements as conventional laparoscopic surgery. Here, we report the first two cases of transumbilical SPLDN at Daejeon St. Mary’s Hospital, The Catholic University of Korea. We used the umbilicus as a common path for laparoscopic procedures and as a route for specimen retrieval. The operating times were 230 and 265 minutes in cases 1 and 2, respectively. No intra- or postoperative complications were noted. In case 1, the wound length was 4 cm and duration of hospitalization was 2 days. In case 2, the wound length was only 2.5 cm, and the duration of hospitalization was only 1 day.
BOAO PHOTOMETRIC SURVEY OF GALACTIC OPEN CLUSTERS. III. CZERNIK 24 AND CZERNIK 27
Kim Sang-Chul,Park Hong-Soo,Sohn Sang-Mo Tony,Lee Myung-Gyoon,Park Byeong-Gon,Sung Hwan-Kyung,Ann Hong-Bae,Chun Moo-Young,Kim Seung-Lee,Jeon Young-Beom,Yuk In-Soo,Lee Sang- Hyun The Korean Astronomical Society 2005 Journal of The Korean Astronomical Society Vol.38 No.4
We present BV CCD photometry for the open clusters Czernik 24 and Czernik 27. These clusters have never been studied before, and we provide, for the first time, the cluster parameters; reddening, distance, metallicity and age. Czernik 24 is an old open cluster with age $1.8{\pm}0.2Gyr$, metallicity $[Fe/H]=-0.41{\pm}0.15dex$, distance modulus $(m-M)_0=13.1{\pm}0.3mag$ ($d=4.1{\pm}0.5kpc$), and reddening $E(B-V)=0.54{\pm}0.12mag$. The parameters for Czernik 27 are estimated to be $age=0.63{\pm}0.07Gyr$, $[Fe/H]=-0.02{\pm}0.10dex$, $(m-M)_0=13.8{\pm}0.2mag$ ($d=5.8{\pm}0.5kpc$), and $E(B-V)=0.15{\pm}0.05mag$. The metallicity and distance values for Czernik 24 are consistent with the relation between the metallicity and the Galactocentric distance of other old open clusters. We find the metallicity gradient of 51 old open clusters including Czernik 24 to be ${\Delta}[Fe/H]/{\Delta}R_{gc}=-0.064 {\pm}0.009dex\;kpc^{-1}$.