http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Final height of Korean patients with early treated congenital hypothyroidism
Lee, Jiyun,Lee, Jeongho,Lee, Dong Hwan The Korean Pediatric Society 2018 Clinical and Experimental Pediatrics (CEP) Vol.61 No.7
Purpose: Congenital hypothyroidism (CH) is the most common endocrine disorder in children. Thyroid hormone deprivation results not only in mental retardation but also growth retardation. This study investigates the final height (FH) in Korean patients with CH detected by newborn screening and examines factors that may affect the FH. Methods: The medical records of Korean CH patients (n=45) were reviewed. The FH was examined and target height (TH) was calculated based on mid-parental height. The FH z score (FHZ) and TH z score (THZ) were computed using the 2007 Korean National Growth Chart. The FHZ and THZ were compared with a Student t test. The impact of the etiology of CH (athyreosis, dyshormonogenesis, ectopic thyoid, hypoplastic thyroid), initial serum thyroid stimulating hormone (TSH) level, initial free thyroxine (T4) level, and time of therapy initiation based on FH was assessed. Results: The mean FHZ was $0.10{\pm}1.01$ for male patients and $-0.11{\pm}1.09$ for female patients. There were no significant differences between FHZ and THZ for both female (P=0.356) and male patients (P=0.237). No significant relationship was found between FH and the etiology of CH, initial TSH level, initial free T4 level, and the time of therapy initiation. Conclusion: Early intervention and satisfactory management do not appear to impede growth in Korean patients with CH. Thus, early detection and proper management of patients with CH detected by newborn screening program are necessary.
Lee, Ki-Young,Kim, Ji-Hun,Lee, Kyu-Yeon,Lee, Jiyun,Lee, Ingyun,Bae, Ye-Ji,Lee, Bong-Jin American Chemical Society 2013 Biochemistry Vol.52 No.9
<P>Complex I (NADH-quinone oxidoreductase) is an enzyme that catalyzes the initial electron transfer from nicotinamide adenine dinucleotide (NADH) to flavin mononucleotide (FMN) bound at the tip of the hydrophilic domain of complex I. The electron flow into complex I is coupled to the generation of a proton gradient across the membrane that is essential for the synthesis of ATP. However, <I>Helicobacter pylori</I> has an unusual complex I that lacks typical NQO1 and NQO2 subunits, both of which are generally included in the NADH dehydrogenase domain of complex I. Here, we determined the solution structure of HP1264, one of the unusual subunits of complex I from <I>H. pylori</I>, which is located in place of NQO2, by three-dimensional nuclear magnetic resonance (NMR) spectroscopy and revealed that HP1264 can bind to FMN through UV–visible, fluorescence, and NMR titration experiments. This result suggests that FMN-bound HP1264 could be involved in the initial electron transfer step of complex I. In addition, HP1264 is structurally most similar to <I>Escherichia coli</I> TusA, which belongs to the SirA-like superfamily having an IF3-like fold in the SCOP database, implying that HP1264 adopts a novel fold for FMN binding. On the basis of the NMR titration data, we propose the candidate residues Ile32, Met34, Leu58, Trp68, and Val71 of HP1264 for the interaction with FMN. Notably, these residues are not conserved in the FMN binding site of any other flavoproteins with known structure. This study of the relationship between the structure and FMN binding property of HP1264 will contribute to improving our understanding of flavoprotein structure and the electron transfer mechanism of complex I.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bichaw/2013/bichaw.2013.52.issue-9/bi301714a/production/images/medium/bi-2012-01714a_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/bi301714a'>ACS Electronic Supporting Info</A></P>
Lee, Seahyoung,Yun, Ina,Ham, Onju,Lee, Se-Yeon,Lee, Chang Yeon,Park, Jun-Hee,Lee, Jiyun,Seo, Hyang-Hee,Choi, Eunhyun,Hwang, Ki-Chul BioMed Central 2015 BIOLOGICAL RESEARCH Vol.48 No.1
<P><B>Background</B></P><P>Low survival rate of transplanted cells compromises the efficacy of cell therapy. Hexokinase II (HKII) is known to have anti-apoptotic activity through its interaction with mitochondria. The objective was to identify miRNAs targeting HKII and investigate whether miRNA-mediated modulation of HKII could improve the survival of mesenchymal stem cells (MSCs) exposed to H<SUB>2</SUB>O<SUB>2</SUB>. The expression of HKII in MSCs exposed to H<SUB>2</SUB>O<SUB>2</SUB> was evaluated, and HKII-targeting miRNA was screened based on miRNA-target prediction databases. The effect of H<SUB>2</SUB>O<SUB>2</SUB> on the expression of the selected HKII-targeting miRNA was examined and the effect of modulation of the selected HKII-targeting miRNA using anti-miRNA on H<SUB>2</SUB>O<SUB>2</SUB>-induced apoptosis of MSC was evaluated.</P><P><B>Results</B></P><P>H<SUB>2</SUB>O<SUB>2</SUB> (600 μM) induced cell death of MSCs and decreased mitochondrial HKII expression. We have identified miR-181a as a HKII-targeting miRNA and H<SUB>2</SUB>O<SUB>2</SUB> increased the expression of miR-181a in MSCs. Delivery of anti-miR-181a, which neutralizes endogenous miR-181a, significantly attenuated H<SUB>2</SUB>O<SUB>2</SUB>-induced decrease of HKII expression and disruption of mitochondrial membrane potential, improving the survival of MSCs exposed to H<SUB>2</SUB>O<SUB>2</SUB>.</P><P><B>Conclusions</B></P><P>These findings suggest that H<SUB>2</SUB>O<SUB>2</SUB>-induced up-regulation of miR-181a contributes to the cell death of MSCs by down-regulating HKII. Neutralizing miR-181a can be an effective way to prime MSCs for transplantation into ischemic tissues.</P>
Ham, Onju,Lee, Chang Youn,Song, Byeong-Wook,Lee, Se-Yeon,Kim, Ran,Park, Jun-Hee,Lee, Jiyun,Seo, Hyang-Hee,Lee, Chae Yoon,Chung, Yong-An,Maeng, Lee-So,Lee, Min Young,Kim, Jongmin,Hwang, Jihwan,Woo, Don Korean Society for Molecular and Cellular Biology 2014 Molecules and cells Vol.37 No.6
The use of synovial fluid-derived mesenchymal stem cells (SFMSCs) obtained from patients with degenerative arthropathy may serve as an alternative therapeutic strategy in osteoarthritis (OA) and rheumatoid arthritis (RA). For treatment of OA and RA patients, autologous transplantation of differentiated MSCs has several beneficial effects for cartilage regeneration including immunomodulatory activity. In this study, we induced chondrogenic differentiation of SFMSCs by inhibiting protein kinase A (PKA) with a small molecule and microRNA (miRNA). Chondrogenic differentiation was confirmed by PCR and immunocytochemistry using probes specific for aggrecan, the major cartilaginous proteoglycan gene. Absorbance of alcian blue stain to detect chondrogenic differentiation was increased in H-89 and/or miRNA-23b-transfected cells. Furthermore, expression of matrix metalloproteinase (MMP)-9 and MMP-2 was decreased in treated1 cells. Therefore, differentiation of SFMSCs into chondrocytes through inhibition of PKA signaling may be a therapeutic option for OA or RA patients.
Lee, Kihoon,Lee, Jiyun IET 2017 IET signal processing Vol.11 No.6
<P>The most effective method for overcoming the interference vulnerability of global navigation satellite system (GNSS) receivers is to use an adaptive array antenna which has the capability of nulling or beamforming to a certain direction. The space-time adaptive processing (STAP) algorithm, which is very effective in signal processing of the array antenna for anti-interference, is studied. The phenomenon of pseudorange error in STAP is analysed with a new superposition method of linear line correlation functions. From this analysis, a new symmetric STAP algorithm, which uses an appropriate constraint condition for GNSS signals, is proposed to completely prevent this pseudorange error. The new STAP algorithm performance is verified and confirmed by simulations and experiments with a four-element array antenna. According to the simulation results, the new STAP algorithm has no pseudorange error, whereas the already existing STAP algorithm has an error of 1.6m. Also experiments with four RF channels analogue-to-digital converter data and a real-time receiver confirm the effectiveness of their precise STAP algorithm which is easy to implement.</P>