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https://www.readbyqxmd.com/read/28821793/molecular-mechanisms-of-atlastin-mediated-er-membrane-fusion-revealed-by-a-fret-based-single-vesicle-fusion-assay
#1
Kyung Tae Kim, Yeojin Moon, Yunsu Jang, Kang Taek Lee, Changwook Lee, Youngsoo Jun, Sanghwa Lee
Homotypic fusion of endoplasmic reticulum membranes is driven by atlastin GTPases; however, the underlying mechanism remains largely unknown. Here, using a FRET-based single-vesicle fusion assay with liposomes bearing the yeast atlastin Sey1p, we investigated the molecular mechanisms of atlastin-mediated membrane tethering and fusion. Although Sey1p-bearing proteoliposomes frequently underwent membrane tethering in a GTP hydrolysis-dependent manner as reported in studies using bulk assays, only a small fraction of the tethered liposomes proceeded to fusion...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821456/hyperglycemia-is-associated-with-increased-bone-mineral-density-and-decreased-trabecular-bone-score-in-elderly-japanese-men-the-fujiwara-kyo-osteoporosis-risk-in-men-formen-study
#2
Masayuki Iki, Yuki Fujita, Katsuyasu Kouda, Akiko Yura, Takahiro Tachiki, Junko Tamaki, Renaud Winzenrieth, Yuho Sato, Jong-Seong Moon, Nozomi Okamoto, Norio Kurumatani
PURPOSE: Patients with type 2 diabetes mellitus (T2DM) have an increased fracture risk despite having higher areal bone mineral density (aBMD). This study aimed to clarify the association between glycemic and insulin resistance status and bone microarchitecture, and whether pentosidine and bone turnover markers play any roles in the association. METHODS: A total of 2012 community-dwelling men aged ≥65years completed baseline measurements of spine aBMD, fasting plasma glucose (FPG) and serum insulin, hemoglobin A1c (HbA1c), osteocalcin, type I procollagen N-terminal propeptide, type I collagen C-terminal crosslinking telopeptide, tartrate-resistant acid phosphatase isoenzyme 5b, pentosidine, height and weight and an interview regarding past disease history...
August 15, 2017: Bone
https://www.readbyqxmd.com/read/28821435/model-based-population-pk-pd-analysis-of-furosemide-for-bp-lowering-effect-a-comparative-study-in-primary-and-secondary-hypertension
#3
Mahendra Shukla, Moustafa M A Ibrahim, Moon Jain, Swati Jaiswal, Abhisheak Sharma, Kashif Hanif, Jawahar Lal
Though numerous reports have demonstrated multiple mechanisms by which furosemide can exert its anti-hypertensive response. However, lack of studies describing PK-PD relationship for furosemide featuring its anti-hypertensive property has limited its usage as a blood pressure (BP) lowering agent. Serum concentrations and mean arterial BP were monitored following 40 and 80mgkg(-1) multiple oral dose of furosemide in spontaneously hypertensive rats (SHR) and DOCA-salt induced hypertensive (DOCA-salt) rats. A simultaneous population PK-PD relationship using Emax model with effect compartment was developed to compare the anti-hypertensive efficacy of furosemide in these rat models...
August 15, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28820719/central-nervous-system-infection-associated-with-orientia-tsutsugamushi-in-south-korea
#4
Han Sang Lee, Jun-Sang Sunwoo, Seon-Jae Ahn, Jangsup Moon, Jung-Ah Lim, Jin-Sun Jun, Woo-Jin Lee, Soon-Tae Lee, Keun-Hwa Jung, Kyung-Il Park, Ki-Young Jung, Sang Kun Lee, Kon Chu
Orientia tsutsugamushi is a major cause of vector-borne infection in Asia. Prompt recognition and appropriate treatment are crucial because of its potentially fatal complications and lack of response to beta-lactam antibiotics. The present study retrospectively evaluated the clinical characteristics and laboratory findings of 16 patients with scrub typhus-related central nervous system (CNS) infections. Single titers ≥ 1:40 of total serum antibodies against O. tsutsugamushi detected by an indirect immunofluorescent assay were considered as positive results...
July 31, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28820643/a-prototype-ice-melting-probe-for-collecting-biological-samples-from-cryogenic-ice-at-low-pressure
#5
Ashley Davis
In the Solar System, the surface of an icy moon is composed of irregular ice formations at cryogenic temperatures (<200 K), with an oxidized surface layer and a tenuous atmosphere at very low pressure (<10(-6) atm). A lander mission, whose aim is to collect and analyze biological samples from the surface ice, must contain a device that collects samples without refreezing liquid and without sublimation of ice. In addition, if the samples are biological in nature, then precautions must be taken to ensure the samples do not overheat or mix with the oxidized layer...
August 2017: Astrobiology
https://www.readbyqxmd.com/read/28819451/a-high-affinity-repebody-for-molecular-imaging-of-egfr-expressing-malignant-tumors
#6
Misun Yun, Dong-Yeon Kim, Joong-Jae Lee, Hyeon-Sik Kim, Hyung-Seok Kim, Ayoung Pyo, Yiseul Ryu, Tae-Yoon Kim, Jin Hai Zheng, Su Woong Yoo, Hoon Hyun, Gyungseok Oh, Jaeho Jeong, Myeongju Moon, Jung-Hyun Min, Seong Young Kwon, Jung Young Kim, Euiheon Chung, Yeongjin Hong, Wansik Lee, Hak-Sung Kim, Jung-Joon Min
The accurate detection of disease-related biomarkers is crucial for the early diagnosis and management of disease in personalized medicine. Here, we present a molecular imaging of human epidermal growth factor receptor (EGFR)-expressing malignant tumors using an EGFR-specific repebody composed of leucine-rich repeat (LRR) modules. The repebody was labeled with either a fluorescent dye or radioisotope, and used for imaging of EGFR-expressing malignant tumors using an optical method and positron emission tomography...
2017: Theranostics
https://www.readbyqxmd.com/read/28819434/identification-of-transcription-factor-yy1-as-a-regulator-of-a-prostate-cancer-specific-pathway-using-proteomic-analysis
#7
Arum Park, Jiyeong Lee, Sora Mun, Doo Jin Kim, Byung Heun Cha, Kyong Tae Moon, Tag Keun Yoo, Hee-Gyoo Kang
Prostate-specific antigen, a biomarker used to diagnose prostate cancer, exhibits poor sensitivity. Although previous studies have focused on identifying a new diagnostic biomarker, the molecules or networks identified in these studies are also present in other cancers, making it difficult to detect prostate cancer specifically. A unique characteristic of the prostate gland is the increased mitochondrial energy metabolism when normal prostate cells progress to cancer cells. Thus, we attempted to find a prostate cancer-specific signature present in this unique environment...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819373/increased-transgenerational-intestinal-tumorigenesis-in-offspring-of-ionizing-radiation-exposed-parent-apc-1638n-mice
#8
Shubhankar Suman, Santosh Kumar, Bo-Hyun Moon, Albert J Fornace, Bhaskar V S Kallakury, Kamal Datta
The purpose of the study was to assess transgenerational intestinal tumorigenic effects of low dose ionizing radiation employing a well-characterized mouse model of human colorectal cancer. Mice (6 to 8 weeks old APC(1638N/+) mice; n=20 per study group) were exposed to whole-body 25 cGy x-rays and mated 2 days post-irradiation. Intestinal tumorigenesis in male and female F1 mice from No Parents Irradiated (NPI), Both Parents Irradiated (BPI), and Male Parent Irradiated (MPI) groups were compared 210 days after birth...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28818792/regulation-of-type-i-interferon-responses-by-mitochondria-derived-reactive-oxygen-species-in-plasmacytoid-dendritic-cells
#9
Zsofia Agod, Tünde Fekete, Marietta M Budai, Aliz Varga, Attila Szabo, Hyelim Moon, Istvan Boldogh, Tamas Biro, Arpad Lanyi, Attila Bacsi, Kitti Pazmandi
Mitochondrial reactive oxygen species (mtROS) generated continuously under physiological conditions have recently emerged as critical players in the regulation of immune signaling pathways. In this study we have investigated the regulation of antiviral signaling by increased mtROS production in plasmacytoid dendritic cells (pDCs), which, as major producers of type I interferons (IFN), are the key coordinators of antiviral immunity. The early phase of type I IFN production in pDCs is mediated by endosomal Toll-like receptors (TLRs), whereas the late phase of IFN response can also be triggered by cytosolic retinoic acid-inducible gene-I (RIG-I), expression of which is induced upon TLR stimulation...
July 29, 2017: Redox Biology
https://www.readbyqxmd.com/read/28818531/the-position-of-fluorine-in-cp-118-954-affects-ache-inhibition-potency-and-pet-imaging-quantification-for-ache-expression-in-the-rat-brain
#10
Byung Chul Lee, Byung Seok Moon, Hyun Soo Park, Jae Ho Jung, Hyun Sik Park, Do Dam Park, Modesto de Candia, Nunzio Denora, Cosimo D Altomare, Sang Eun Kim
The in vitro inhibition potency against acetylcholinesterase (AChE) of fluorinated derivatives of CP-118,954 (1) has been shown to depend upon the position of aromatic fluorine (F) substitution on the N-benzyl moiety. Indeed, the meta-F-substituted compound 3 (IC50=1.4nM) shows similar potency with the parent compound 1 (IC50=1.2nM), whereas the ortho-F derivative 2 (IC50=3.2nM) and para-F derivative 4 (IC50=10.8nM) were found to be less potent AChE inhibitors. A comparative in vivo microdialysis study in rats showed that 3 has the strongest effect on the neuropharmacological properties as AChE inhibitor...
August 14, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28817120/the-erythropoietin-derived-peptide-mk-x-and-erythropoietin-have-neuroprotective-effects-against-ischemic-brain-damage
#11
Seung-Jun Yoo, Bongki Cho, Deokho Lee, Gowoon Son, Yeong-Bae Lee, Hyung Soo Han, Eunjoo Kim, Chanil Moon, Cheil Moon
Erythropoietin (EPO) has been well known as a hematopoietic cytokine over the past decades. However, recent reports have demonstrated that EPO plays a neuroprotective role in the central nervous system, and EPO has been considered as a therapeutic target in neurodegenerative diseases such as ischemic stroke. Despite the neuroprotective effect of EPO, clinical trials have shown its unexpected side effects, including undesirable proliferative effects such as erythropoiesis and tumor growth. Therefore, the development of EPO analogs that would confer neuroprotection without adverse effects has been attempted...
August 17, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28817071/topological-interference-management-for-k-user-downlink-massive-mimo-relay-network-channel
#12
Poongundran Selvaprabhu, Sunil Chinnadurai, Jun Li, Moon Ho Lee
In this paper, we study the emergence of topological interference alignment and the characterizing features of a multi-user broadcast interference relay channel. We propose an alternative transmission strategy named the relay space-time interference alignment (R-STIA) technique, in which a K -user multiple-input-multiple-output (MIMO) interference channel has massive antennas at the transmitter and relay. Severe interference from unknown transmitters affects the downlink relay network channel and degrades the system performance...
August 17, 2017: Sensors
https://www.readbyqxmd.com/read/28816940/signet-ring-cell-carcinoma-of-early-gastric-cancer-is-endoscopic-treatment-really-risky
#13
Sun Hyung Kang, Joo Seok Kim, Hee Seok Moon, Eaum Seok Lee, Seok Hyun Kim, Jae Kyu Sung, Byung Seok Lee, Hyun Yong Jeong
Signet ring cell carcinoma (SRC) is a poorly differentiated cancer of the stomach. Generally, poorly differentiated cancer is believed to show poor prognosis and aggressive behavior. Recently, however, there is debate on the aggressiveness of SRC in early gastric cancer (EGC). We therefore studied postoperation biopsies to investigate the aggressiveness of SRC in EGC.We reviewed medical records of patients with EGC who had surgery from January 2011 to December 2015 in a tertiary hospital in Daejeon, South Korea...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816616/transfer-rna-mediated-enhancement-of-ribosomal-proteins-s6-kinases-signalling-for-cell-proliferation
#14
Nam Hoon Kwon, Mi Ran Lee, Jiwon Kong, Seung Kyun Park, Byung Joon Hwang, Byung Gyu Kim, Eun-Shin Lee, Hyeong-Gon Moon, Sunghoon Kim
While transfer RNAs (tRNAs) are known to transport amino acids to ribosome, new functions are being unveiled from tRNAs and their fragments beyond protein synthesis. Here we show that phosphorylation of 90-kDa RPS6K (ribosomal proteins S6 kinase) was enhanced by tRNA(Leu) overexpression under amino acids starvation condition. The phosphorylation of 90-kDa RPS6K was decreased by siRNA specific to tRNA(Leu) and was independent to mTOR (mammalian target of rapamycin) signalling. Among the 90-kDa RPS6K family, RSK1 (ribosomal S6 kinase 1) and MSK2 (mitogen-and stress-activated protein kinase 2) were the major kinases phosphorylated by tRNA(Leu) overexpression...
August 17, 2017: RNA Biology
https://www.readbyqxmd.com/read/28816521/plume-activity-and-tidal-deformation-on-enceladus-influenced-by-faults-and-variable-ice-shell-thickness
#15
Marie Běhounková, Ondřej Souček, Jaroslav Hron, Ondřej Čadek
We investigated the effect of variations in ice shell thickness and of the tiger stripe fractures crossing Enceladus' south polar terrain on the moon's tidal deformation by performing finite element calculations in three-dimensional geometry. The combination of thinning in the polar region and the presence of faults has a synergistic effect that leads to an increase of both the displacement and stress in the south polar terrain by an order of magnitude compared to that of the traditional model with a uniform shell thickness and without faults...
August 17, 2017: Astrobiology
https://www.readbyqxmd.com/read/28815632/uniform-sized-neurosphere-mediated-motoneuron-differentiation-in-microwell-arrays
#16
Jong Min Lee, Joo Yoon Moon, Mohammed R Shaker, Woong Sun, Bong Geun Chung
We developed the photo-crosslinkable hydrogel microwell arrays for uniform-sized neurosphere-mediated motoneuron differentiation. Neural stem cells (NSCs) were obtained from embryonic cerebral cortex and spinal cord. To generate uniform-sized neurospheres in a homogeneous manner, the dissociated cells were cultured in the hydrogel microwell arrays for 3 days. Uniform-sized neurospheres harvested from microwell arrays were replated into laminin-coated a two-dimensional (2D) substrate. In parallel, uniform-sized neurospheres cultured in microwell arrays were encapsulated by photocrosslinkable gelatin methacrylate (GelMA) hydrogels in a three-dimensional (3D) manner...
August 16, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28815221/a-modified-efficient-purse-string-stapling-technique-mest-that-uses-a-new-metal-rod-for-intracorporeal-esophagojejunostomy-in-laparoscopic-total-gastrectomy
#17
REVIEW
Takeshi Omori, Jeong-Ho Moon, Kazuyoshi Yamamoto, Yoshitomo Yanagimoto, Keijirou Sugimura, Hiroshi Miyata, Masahiko Yano, Masato Sakon
Intracorporeal esophagojejunostomy after laparoscopic total gastrectomy is technically difficult because this procedure should be performed in a narrow surgical field in the upper abdomen even when completely laparoscopic approaches are used. The placement of the anvil of a circular stapling device into the esophagus and connection the instrument to the anvil are extremely difficult steps in this surgery. Therefore, we developed a simple technique for intracorporeal esophagojejunostomy using hemi-double stapling technique; we named this technique the efficient purse-string stapling technique (EST)...
2017: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28815090/effects-of-the-rho-kinase-inhibitor-y-27632-on-extraocular-muscle-surgery-in-rabbits
#18
Ji-Sun Moon, Hyun Kyung Kim, Sun Young Shin
PURPOSE: To evaluate the effect of the Rho-kinase inhibitor Y-27632 on postoperative inflammation and adhesion following extraocular muscle surgery in rabbits. METHODS: The superior rectus muscle reinsertion was performed on both eyes of 8 New Zealand white rabbits. After reinsertion, the rabbits received subconjunctival injections of the Rho-kinase inhibitor and saline on each eye. To assess acute and late inflammatory changes, Ki-67, CD11β+, and F4/80 were evaluated and the sites of muscle reattachment were evaluated for a postoperative adhesion score and histopathologically for collagen formation...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28814626/are-there-long-term-consequences-of-room-sharing-during-infancy
#19
Rachel Y Moon, Fern R Hauck
No abstract text is available yet for this article.
June 5, 2017: Pediatrics
https://www.readbyqxmd.com/read/28814345/hospital-characteristics-related-to-the-hospital-length-of-stay-among-inpatients-receiving-invasive-cervical-discectomy-due-to-road-traffic-accidents-under-automobile-insurance-in-south-korea
#20
Kyoung Won Shin, Hyo Jung Lee, Chung Mo Nam, Ki Tae Moon, Eun-Cheol Park
BACKGROUND: In South Korea, people injured in road traffic accidents receive compensation for medical costs through their automobile insurance. However, the automobile insurance system appears to manage health care inefficiently. This study aimed to investigate the factors associated with the hospital length of stay (LOS), which was used as an indicator of healthcare utilization, for inpatients covered by automobile insurance and undergoing invasive cervical discectomy. METHODS: Insurance claims data from 158 hospitals were used...
August 16, 2017: BMC Health Services Research
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