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https://www.readbyqxmd.com/read/28538096/location-of-the-substrate-binding-site-of-the-cytochrome-bo3-ubiquinol-oxidase-from-escherichia-coli
#1
Sylvia K Choi, Lici Schurig-Briccio, Ziqiao Ding, Sangjin Hong, Chang Sun, Robert B Gennis
Cytochrome bo3 is a respiratory proton-pumping oxygen reductase that is a member of the heme-copper superfamily that utilizes ubiquinol-8 (Q8H2) as a substrate. The current consensus model has Q8H2 oxidized at a low affinity site (QL), passing electrons to a tightly bound quinone cofactor at a high affinity site (QH site) that stabilizes the one-electron reduced ubisemiquinone, facilitating the transfer of electrons to the redox active metal centers where O2 is reduced to water. The current work shows that the Q8 bound to the QH site is more dynamic than previously thought...
May 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28498398/per2-is-downregulated-by-the-lps-induced-inflammatory-response-in-synoviocytes-in-rheumatoid-arthritis-and-is-implicated-in-disease-susceptibility
#2
Hwayoung Lee, Seong-Su Nah, Sung-Hae Chang, Hyung-Ki Kim, Jun-Tack Kwon, Sanghyun Lee, Ik-Hyun Cho, Sang Won Lee, Young Ock Kim, Seung-Jae Hong, Hak-Jae Kim
The clinical symptoms of rheumatoid arthritis (RA) present with circadian variation, with joint stiffness and pain more prominent in the early morning. The mammalian clock genes, which include circadian locomotor output cycles kaput, brain and muscle Arnt-like protein 1, period and cryptochrome, regulate circadian rhythms. In order to identify the association between genetic polymorphisms in the circadian clock gene period 2 (PER2) and RA, the present study genotyped three PER2 single nucleotide polymorphisms (SNPs), rs934945, rs6754875, and rs2304674, using genetic information from 256 RA patients and 499 control subjects...
May 11, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28490335/ing5-suppresses-breast-cancer-progression-and-is-regulated-by-mir-24
#3
Shufang Cui, Xin Liao, Chao Ye, Xin Yin, Minghui Liu, Yeting Hong, Mengchao Yu, Yanqing Liu, Hongwei Liang, Chen-Yu Zhang, Xi Chen
BACKGROUND: The inhibitor of growth (ING) gene family of tumor suppressors is involved in multiple cellular functions such as cell cycle regulation, apoptosis, and chromatin remodeling. ING5 is a new member of the ING family whose function and regulation remain largely unknown. METHODS: Quantitative real-time PCR and western blot were used to examine the expression levels of ING5 in breast cancer tissues. The miRNAs that potentially targeted ING5 were determined by bioinformatics analysis and luciferase reporter assay...
May 10, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28487991/blood-glycemia-modulating-effects-of-melanian-snail-protein-hydrolysates-in-mice-with-type%C3%A2-ii-diabetes
#4
Jae-Suk Choi, Joo-Wan Kim, Jeong Been Park, Sang Eun Pyo, Yong-Ki Hong, Sae Kwang Ku, Mi-Ryung Kim
Freshwater animal proteins have long been used as nutrient supplements. In this study, melanian snail (Semisulcospira libertina) protein hydrolysates (MPh) were found to exert anti-diabetic and protective effects against liver and kidney damage in mice with type II diabetes adapted to a 45% kcal high-fat diet (HFD). The hypoglycemic, hepatoprotective and nephroprotective effects of MPh were analyzed after 12 weeks of the continuous oral administration of MPh at 125, 250 and 500 mg/kg. Diabetic control mice exhibited an increase in body weight, and blood glucose and insulin levels, with a decrease in serum high-density lipoprotein (HDL) levels...
June 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28484945/the-de-ritis-aspartate-transaminase-alanine-transaminase-ratio-as-a-predictor-of-oncological-outcomes-in-patients-after-surgery-for-upper-urinary-tract-urothelial-carcinoma
#5
Yang Hyun Cho, Jun Eul Hwang, Ho Seok Chung, Myung Soo Kim, Eu Chang Hwang, Seung Il Jung, Taek Won Kang, Dong Deuk Kwon, Seock Hwan Choi, Hyun Tae Kim, Tae-Hwan Kim, Tae Gyun Kwon, Joon Hwa Noh, Myung Ki Kim, Chul-Sung Kim, Sung Gu Kang, Seok Ho Kang, Jun Cheon, Chan Ho Lee, Ja Yoon Ku, Hong Koo Ha, Bum Sik Tae, Chang Wook Jeong, Ja Hyeon Ku, Cheol Kwak, Hyeon Hoe Kim
PURPOSE: Recently, several studies have shown that the De Ritis ratio (aspartate transaminase/alanine transaminase) can be a useful prognostic biomarker for certain types of malignant tumors. However, the prognostic value of the De Ritis ratio in patients with upper tract urothelial carcinoma remains largely unknown. The aim of the present study was to evaluate the prognostic significance of the De Ritis ratio in patients who had undergone radical nephroureterectomy (RNU) for upper urinary tract urothelial carcinoma...
May 8, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28476671/flow-cytometric-characterization-of-hemocytes-of-the-solitary-ascidian-halocynthia-roretzi
#6
Ludovic Donaghy, Hyun-Ki Hong, Kyung-Il Park, Kajino Nobuhisa, Seok-Hyun Youn, Chang-Keun Kang, Kwang-Sik Choi
Internal defense of ascidians relies, at least partially, on cells circulating in body fluids and infiltrating in tissues, referred to as hemocytes, although structure and composition of ascidian hemocytes still remain unclear. In the present study, we investigated hemocyte types and their functions of the solitary ascidian Halocynthia roretzi using flow cytometry. Based on morphology, cellular activities and intracellular parameters from the flow cytometry, we identified eight hemocyte types including, three granulocytes (Gr-1, Gr-2, and Gr-3), 4 hyalinocytes (Hy-1, Hy-1', Hy-2, and Hy-3) and lymphocyte-like (Ly-like) cells...
May 2, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28465762/paricalcitol-pretreatment-attenuates-renal-ischemia-reperfusion-injury-via-prostaglandin-e2-receptor-ep4-pathway
#7
Yu Ah Hong, Keum Jin Yang, So Young Jung, Ki Cheol Park, Hyunsu Choi, Jeong Min Oh, Sang Ju Lee, Yoon Kyung Chang, Cheol Whee Park, Chul Woo Yang, Suk Young Kim, Hyeon Seok Hwang
The protective mechanism of paricalcitol remains unclear in renal ischemia-reperfusion (IR) injury. We investigated the renoprotective effects of paricalcitol in IR injury through the prostaglandin E2 (PGE2) receptor EP4. Paricalcitol was injected into IR-exposed HK-2 cells and mice subjected to bilateral kidney ischemia for 23 min and reperfusion for 24 hr. Paricalcitol prevented IR-induced cell death and EP4 antagonist cotreatment offset these protective effects. Paricalcitol increased phosphorylation of Akt and cyclic AMP responsive element binding protein (CREB) and suppressed nuclear factor-κB (NF-κB) in IR-exposed cells and cotreatment of EP4 antagonist or EP4 small interfering RNA blunted these signals...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28454230/a-subpopulation-of-cancer-stem-cells-identifies-radiographic-characteristics-in-glioblastoma
#8
Ja Eun Kim, Sung Kwon Kim, Jaekyung Shin, Young-Bem Se, Seung Hong Choi, Sung-Hye Park, Seung Ah Choi, Ji Yeoun Lee, Ji Hoon Phi, Kyu-Chang Wang, Chul-Kee Park, Seung-Ki Kim
Cancer stem cells (CSCs), defined by CD133 expression, harbor heterogeneous subpopulations of cells, including endothelial progenitor cells (EPCs). This study aimed to investigate whether a subpopulation of CSCs could affect the radiographic characteristics of glioblastoma. Tissue samples from 10 patients newly diagnosed with glioblastoma were selected according to the radiographic characteristics of their tumors. The patients were divided into two groups based on preoperative magnetic resonance imaging demonstrating contrast enhancement, necrosis and infiltrative patterns: the enhancement/necrosis group (E/N, n=5) and the non-enhancement/infiltration group (NE/I, n=5)...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28446017/dexmedetomidine-oral-mucosa-patch-for-sedation-suppresses-apoptosis-in-hippocampus-of-normal-rats
#9
Je Hoon Park, Il Gyu Ko, Sung Eun Kim, Jun Jang Jin, Lakkyong Hwang, Chang Ju Kim, Soo Hwan Yoon, Jongki Hong, Jun Young Chung, Deok Won Lee
PURPOSE: Dexmedetomidine, an α2-adrenergic agonist, provides sedative and analgesic effects without significant respiratory depression. Dexmedetomidine has been suggested to have an antiapoptotic effect in response to various brain insults. We developed an oral mucosa patch using dexmedetomidine for sedation. The effects of the dexmedetomidine oral mucosa patch on cell proliferation and apoptosis in the hippocampus were evaluated. METHODS: A hydrogel oral mucosa patch was adhered onto the oral cavity of physiologically normal rats, and was attached for 2 hours, 6 hours, 12 hours, or 24 hours...
April 2017: International Neurourology Journal
https://www.readbyqxmd.com/read/28435405/establishment-and-characterization-of-6-novel-patient-derived-primary-pancreatic-ductal-adenocarcinoma-cell-lines-from-korean-pancreatic-cancer-patients
#10
Mi-Ju Kim, Min-Sun Kim, Sung Joo Kim, Soyeon An, Jin Park, Hosub Park, Jae Hoon Lee, Ki-Byung Song, Dae Wook Hwang, Suhwan Chang, Kyu-Pyo Kim, Seong-Yun Jeong, Song Cheol Kim, Seung-Mo Hong
BACKGROUND: Pancreatic ductal adenocarcinomas are among the most malignant neoplasms and have very poor prognosis. Our understanding of various cancers has recently improved the survival of patients with cancer, except for pancreatic cancers. Establishment of primary cancer cell lines of pancreatic ductal adenocarcinomas will be useful for understanding the molecular mechanisms of this disease. METHODS: Eighty-one surgically resected pancreatic ductal adenocarcinomas were collected...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28430745/bortezomib-pharmacokinetics-in-tumor-response-and-peripheral-neuropathy-in-multiple-myeloma-patients-receiving-bortezomib-containing-therapy
#11
Sung-Eun Lee, Kyungmee Choi, Seunghoon Han, Jongtae Lee, Taegon Hong, Gab-Jin Park, Dong-Seok Yim, Chang-Ki Min
The usefulness of pharmacokinetics of bortezomib for multiple myeloma (MM) with respect to the maximum response to bortezomib and bortezomib-induced peripheral neuropathy (BIPN) development was studied. Maximum response to subcutaneous bortezomib therapy and BIPN occurrence for the first 12 weeks of treatment in 35 MM patients treated by bortezomib-dexamethasone (VD) and bortezomib-melphalan-prednisone (VMP) were evaluated. On day 1 of cycle 1, seven whole-blood samples were collected for 3 h after dosing completion to obtain the maximum plasma concentration and area under the time-concentration curve during 3 h postdose (AUC0-3) in each patient...
July 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28429236/the-course-of-headache-in-patients-with-moderate-to-severe-headache-due-to-mild-traumatic-brain-injury-a-retrospective-cross-sectional-study
#12
Chang-Ki Hong, Jin-Yang Joo, Yu Shik Shim, Sook Young Sim, Min A Kwon, Yong Bae Kim, Joonho Chung
BACKGROUND: Little is known about the long-term course of headache in patients with moderate-to-severe headache due to traumatic brain injury (TBI). We evaluated the course of headache in patients with moderate-to-severe headache due to mild TBI. METHODS: Since September 2009, patients with TBI prospectively rated their headache using a numeric rating scale (NRS). From the database containing 935 patients with TBI between September 2009 and December 2013, 259 patients were included according to following criteria: (1) newly onset moderate-to-severe headache (NRS ≥ 4) due to head trauma; (2) age ≥ 15 years; (3) Glasgow Coma Scale ≥ 13; (4) transient loss of consciousness ≤ 30 min; and (5) radiographic evaluation, such as computed tomography or magnetic resonance image...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28416746/different-long-term-oncologic-outcomes-after-radical-surgical-resection-for-neuroendocrine-carcinoma-and-adenocarcinoma-of-the-stomach
#13
Jian-Wei Xie, Jun Lu, Jian-Xian Lin, Chao-Hui Zheng, Ping Li, Jia-Bin Wang, Qi-Yue Chen, Long-Long Cao, Mi Lin, Ru-Hong Tu, Chang-Ming Huang
PURPOSE: To explore differences in long-term outcomes between gastric neuroendocrine carcinoma (GNEC) and gastric adenocarcinoma (GAC). METHODS: One hundred GNEC patients and 3089 GAC patients were enrolled. Differences in long-term outcomes between the groups were analyzed by 1:2 propensity score matching. RESULTS: Statistically significant differences between the groups were noted in terms of gender, American Society of Anesthesiologists score, tumor size, T stage, N stage, TNM stage and surgical approach...
February 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28411245/characteristics-of-earlier-versus-delayed-presentation-of-very-late-drug-eluting-stent-thrombosis-an-optical-coherence-tomographic-study
#14
Seung-Yul Lee, Jung-Min Ahn, Gary S Mintz, Seung-Ho Hur, So-Yeon Choi, Sang-Wook Kim, Jin Man Cho, Soon Jun Hong, Jin Won Kim, Young Joon Hong, Sang-Gon Lee, Dong-Ho Shin, Jung-Sun Kim, Byeong-Keuk Kim, Young-Guk Ko, Donghoon Choi, Yangsoo Jang, Seung-Jung Park, Myeong-Ki Hong
BACKGROUND: The pathophysiology underlying very late drug-eluting stent (DES) thrombosis is not sufficiently understood. Using optical coherence tomography, we investigated characteristics of very late stent thrombosis (VLST) according to different onset times. METHODS AND RESULTS: A total of 98 patients from 10 South Korean hospitals who underwent optical coherence tomography for evaluation of very late DES thrombosis were retrospectively included in analyses. VLST occurred at a median of 55...
April 14, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28402945/a-prospective-open-label-multicenter-observational-study-to-evaluate-the-efficacy-and-safety-of-bortezomib-melphalan-prednisone-as-initial-treatment-for-autologous-stem-cell-transplantation-ineligible-patients-with-multiple-myeloma
#15
Min Kyoung Kim, Kihyun Kim, Chang-Ki Min, Jae-Yong Kwak, Sang-Byung Bae, Sung-Soo Yoon, Je-Jung Lee, Ki Hwan Kim, Seung-Hyun Nam, Yeung-Chul Mun, Hyo Jung Kim, Sung Hwa Bae, Ho-Jin Shin, Jung-Hee Lee, Joon Seong Park, Seong Hyun Jeong, Mark Hong Lee, Yang-Soo Kim, Ho Sup Lee, Keon Woo Park, Won-Sik Lee, Sang Min Lee, Jeong-Ok Lee, Myung Soo Hyun, Deog Yeon Jo, Sung-Nam Lim, Jae Hoon Lee, Do-Yeun Cho, Young Rok Do, Jeong-A Kim, Seong Kyu Park, Jin Seok Kim, Soo-Jeong Kim, Hawk Kim, Hyeon Gyu Yi, Joon Ho Moon, Chul Won Choi, Sung-Hyun Kim, Young-Don Joo, Hoon-Gu Kim, Byung Soo Kim, Moo-Rim Park, Moo-Kon Song, Su-Youn Kim
Bortezomib-melphalan-prednisone (VMP) showed superior efficacy versus MP as first-line treatment for transplantation-ineligible multiple myeloma (MM). This study investigated the efficacy of VMP for Korean patients with MM.Overall, 177 MM patients received 9 cycles of VMP in this prospective, multicenter, observational study. The primary endpoint was 2-year progression-free survival (PFS).Thirty-nine (22%) patients were aged ≥ 75 years and 83 (47.4%) patients had International Staging System stage III. A median of 5 cycles were delivered...
April 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28398751/ligand-characteristics-important-to-avidity-interactions-of-multivalent-nanoparticles
#16
Ming-Hsin Li, Hong Zong, Pascale R Leroueil, Seok Ki Choi, James R Baker
Multivalent interactions involve the engagement of multiple ligand-receptor pairs and are important in synthetic biology as design paradigms for targeted nanoparticles (NPs). However, little is known about the specific ligand parameters important to multivalent interactions. We employed a series of oligonucleotides as ligands conjugated to dendrimers as nanoparticles, and used complementary oligonucleotides on a functionalized SPR surface to measure binding. We compared the effect of ligand affinity to ligand number on the avidity characteristics of functionalized NPs...
April 11, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28391019/perimesencephalic-nonaneurysmal-subarachnoid-hemorrhage-after-clipping-of-an-unruptured-aneurysm-case-report
#17
Kwang-Chun Cho, Jung-Jae Kim, Chang-Ki Hong, Jin-Yang Joo, Yong Bae Kim
BACKGROUND: Perimesencephalic nonaneurysmal subarachnoid hemorrhage (PNSAH) is a benign form of subarachnoid hemorrhage with an excellent clinical outcome. The cause of PNSAH remains unknown. We report a case of PNSAH in a patient with a history of clipping of an unruptured aneurysm. PNSAH after clipping of an unruptured aneurysm is extremely rare. CASE DESCRIPTION: A 56-year-old man with a history of clipping surgery for an unruptured aneurysm 10 months previously, presented with severe headache...
April 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28377743/acute-hemiparesis-in-a-healthy-elderly-woman-where-and-what-is-the-lesion
#18
Ji Hoon Lee, Sung Hyuk Heo, Jin San Lee, Dae-Il Chang, Ki-Ho Park, Ji-Youn Sung, Il Ki Hong, Myeong Hee Kim, Bong Jin Park, Woo Suk Choi
Hemiparesis may be the result of lesions in the contralateral pyramidal tract in the brain or, less frequently, in the ipsilateral pyramidal tract in the upper cervical spinal cord. However, although rare, multiple lesions that simultaneously occur in both of these regions may be the cause of acute hemiparesis, and the clinical symptoms can often be misdiagnosed as a stroke. In addition, the correct diagnosis of these multiple central nervous system (CNS) lesions is very challenging if they are caused by infection from an unexpected microorganism...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28373765/chemotherapy-response-evaluation-in-a-mouse-model-of-gastric-cancer-using-intravoxel-incoherent-motion-diffusion-weighted-mri-and-histopathology
#19
Jin Cheng, Yi Wang, Chun-Fang Zhang, He Wang, Wei-Zhen Wu, Feng Pan, Nan Hong, Jie Deng
AIM: To determine the role of intravoxel incoherent motion (IVIM) diffusion-weighted (DW) magnetic resonance imaging (MRI) using a bi-exponential model in chemotherapy response evaluation in a gastric cancer mouse model. METHODS: Mice bearing MKN-45 human gastric adenocarcinoma xenografts were divided into four treated groups (TG1, 2, 3 and 4, n = 5 in each group) which received Fluorouracil and Calcium Folinate and a control group (CG, n = 7). DW-MRI scans with 14 b-values (0-1500 s/mm(2)) were performed before and after treatment on days 3, 7, 14 and 21...
March 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28358992/autophagy-primes-neutrophils-for-neutrophil-extracellular-trap-formation-during-sepsis
#20
So Young Park, Sanjeeb Shrestha, Young-Jin Youn, Jun-Kyu Kim, Shin-Yeong Kim, Hyun Jung Kim, So-Hee Park, Won-Gyun Ahn, Shin Kim, Myung Goo Lee, Ki-Suck Jung, Yong Bum Park, Eun-Kyung Mo, Yousang Ko, Suh-Young Lee, Younsuck Koh, Myung Jae Park, Dong-Keun Song, Chang-Won Hong
RATIONALE: Neutrophils are key effectors in the host's immune response to sepsis. Excessive stimulation or dysregulated neutrophil functions are thought to be responsible for sepsis pathogenesis. However, the mechanisms regulating functional plasticity of neutrophils during sepsis have not been fully determined. OBJECTIVES: We investigated the role of autophagy in neutrophil functions during sepsis in patients with community-acquired pneumonia. METHODS: Neutrophils were isolated from septic patients, and stimulated with phorbol 12-myristate 13-acetate (PMA)...
March 30, 2017: American Journal of Respiratory and Critical Care Medicine
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