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https://www.readbyqxmd.com/read/28325039/strong-pinned-spin-mediated-memory-effect-in-nio-nanoparticles
#1
Ashish Chhaganlal Gandhi, Ting Shan Chan, Jayashree Pant, Sheng Yun Wu
After a decade of effort, a large number of magnetic memory nanoparticles with different sizes and core/shell compositions have been developed. While the field-cooling memory effect is often attributed to particle size and distribution effects, other magnetic coupling parameters such as inter- and intra-coupling strength, exchange bias, interfacial pinned spins, and the crystallinity of the nanoparticles also have a significant influence on magnetization properties and mechanisms. In this study, we used the analysis of static- and dynamic-magnetization measurements to investigate NiO nanoparticles with different sizes and discussed how these field-cooling strengths affect their memory properties...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28324747/optimal-dose-reduction-of-folfirinox-for-preserving-tumour-response-in-advanced-pancreatic-cancer-using-cumulative-relative-dose-intensity
#2
Jong-Chan Lee, Jin Won Kim, Soyeon Ahn, Hyoung Woo Kim, Jongchan Lee, Young Hoon Kim, Kyu-Hyun Paik, Jaihwan Kim, Jin-Hyeok Hwang
BACKGROUND: FOLFIRINOX has increased efficacy but also toxicity. Despite various modified FOLFIRINOX regimens, how much reduction is acceptable remains unclear. This study aimed to find the optimal relative dose intensity (RDI, %) of FOLFIRINOX that preserves tumour responses in patients with advanced pancreatic cancer (PC). METHODS: We reviewed 201 patients with PC treated with first-line FOLFIRINOX during 2012-2015. We established a modified Hryniuk model (http://www...
March 16, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28324091/association-between-dabigatran-vs-warfarin-and-risk-of-osteoporotic-fractures-among-patients-with-nonvalvular-atrial-fibrillation
#3
Wallis C Y Lau, Esther W Chan, Ching-Lung Cheung, Chor Wing Sing, Kenneth K C Man, Gregory Y H Lip, Chung-Wah Siu, Joanne K Y Lam, Alan C H Lee, Ian C K Wong
Importance: The risk of osteoporotic fracture with dabigatran use in patients with nonvalvular atrial fibrillation (NVAF) is unknown. Objective: To investigate the risk of osteoporotic fracture with dabigatran vs warfarin in patients with NVAF. Design, Setting, and Participants: Retrospective cohort study using a population-wide database managed by the Hong Kong Hospital Authority. Patients newly diagnosed with NVAF from 2010 through 2014 and prescribed dabigatran or warfarin were matched by propensity score at a 1:2 ratio with follow-up until July 31, 2016...
March 21, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28324005/insulin-inhibits-nrf2-gene-expression-via-heterogeneous-nuclear-ribonucleoprotein-f-k-in-diabetic-mice
#4
Anindya Ghosh, Shaaban Abdo, Shuiling Zhao, Chin-Han Wu, Yixuan Shi, Chao-Sheng Lo, Isabelle Chenier, Thierry Alquier, Janos G Filep, Julie R Ingelfinger, Shao-Ling Zhang, John S D Chan
Oxidative stress induces endogenous antioxidants via nuclear factor erythroid 2-related factor 2 (Nrf2), potentially preventing tissue injury. We investigated whether insulin affects renal Nrf2 expression in type 1 diabetes (T1D) and studied its underlying mechanism. Insulin normalized hyperglycemia, hypertension, oxidative stress and renal injury, inhibited renal Nrf2 and angiotensinogen (Agt) gene expression and up-regulated heterogeneous nuclear ribonucleoprotein F (hnRNP F) and hnRNP K expression in Akita mice with T1D...
January 23, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323927/exome-sequencing-reveals-mutations-in-aire-as-a-cause-of-isolated-hypoparathyroidism
#5
Dong Li, Elizabeth A Streeten, Alice Chan, Wint Lwin, Lifeng Tian, Renata Pellegrino da Silva, Cecilia E Kim, Mark S Anderson, Hakon Hakonarson, Michael A Levine
Context: Most cases of autosomal recessive hypoparathyroidism (HYPO) are caused by loss-of-function mutations in GCM2 or PTH. Objective: To identify the underlying genetic basis for isolated HYPO in a kindred in which three of ten siblings were affected. Subjects: We studied the parents and the three adult affected subjects, each of whom was diagnosed with HYPO in the first decade of life. Methods: We collected clinical and biochemical data and performed whole exome sequencing (WES) analysis on DNA from the three affected subjects after negative genetic testing for known causes of HYPO...
February 21, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323859/diacerein-inhibits-the-pro-atherogenic-pro-inflammatory-effects-of-il-1-on-human-keratinocytes-endothelial-cells
#6
Girish C Mohan, Huayi Zhang, Lei Bao, Benjamin Many, Lawrence S Chan
We investigated IL-1-induced regulation of genes related to inflammation and atherogenesis in human keratinocytes and endothelial cells, and if 'diacerein', an oral IL-1 inhibiting drug currently approved for use in osteoarthritis, would reverse IL-1's effects on these cells. Primary human keratinocytes and coronary artery endothelial cells were treated with either IL-1α or IL-1β, with and without diacerein. Using PCR-array, we assessed differential gene-expression regulated by IL-1 and diacerein. We identified 34 pro-atherogenic genes in endothelial cells and 68 pro-inflammatory genes in keratinocytes significantly (p<0...
2017: PloS One
https://www.readbyqxmd.com/read/28323727/experience-with-the-use-of-single-use-disposable-bronchoscope-in-the-icu-in-a-tertiary-referral-center-of-singapore
#7
Dominic C Marshall, Rucha S Dagaonkar, Chan Yeow, Anura T Peters, Siew Kin Tan, Dessmon Y H Tai, Soon Keng Gohs, Albert Y H Lim, Benjamin Ho, Sennen J W Lew, John Abisheganaden, Akash Verma
BACKGROUND: Flexible bronchoscopy is performed frequently in intensive care units (ICUs) for various indications using the reusable conventional bronchoscope (CB). Recently, "single-use disposable bronchoscope" (SB) was introduced into the health care industry. The purpose of this study was to compare the utility of SB with CB in ICU. METHODS: A retrospective review of medical records of patients undergoing flexible bronchoscopy in the ICUs in the year 2015. RESULTS: Ninety-three patients undergoing flexible bronchoscopy in the ICU were studied...
April 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/28323715/the-safety-and-strength-of-a-novel-medial-partial-nonthreaded-pedicle-screw-a-cadaveric-and-biomechanical-investigation
#8
Mun Keong Kwan, Chris Yin Wei Chan, Lim Beng Saw, Shanmugam Rukmanikanthan, Lawrence G Lenke
STUDY DESIGN: Cadaveric and biomechanical study. OBJECTIVE: The aim of this study was to assess the safety and pullout strength of medial, partial nonthreaded thoracic pedicle screws compared with conventional screws. SUMMARY OF BACKGROUND DATA: The perforation rate of the pedicle screws has been reported as high as 41%. Nerve injury and irritation can result from the compression of malpositioned screw on neural structures. METHODS: Ten fresh cadavers were studied...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323614/a-chloroplast-retrograde-signal-3-phosphoadenosine-5-phosphate-acts-as-a-secondary-messenger-in-abscisic-acid-signaling-in-stomatal-closure-and-germination
#9
Wannarat Pornsiriwong, Gonzalo M Estavillo, Kai Xun Chan, Estee E Tee, Diep Ganguly, Peter A Crisp, Su Yin Phua, Chenchen Zhao, Jiaen Qiu, Jiyoung Park, Miing Tiem Yong, Nazia Nisar, Arun Kumar Yadav, Benjamin Schwessinger, John Rathjen, Christopher I Cazzonelli, Philippa B Wilson, Matthew Gilliham, Zhong-Hua Chen, Barry J Pogson
Organelle-nuclear retrograde signaling regulates gene expression, but its roles in specialized cells and integration with hormonal signaling remain enigmatic. Here we show that the SAL1-PAP (3'-phosphoadenosine 5'- phosphate) retrograde pathway interacts with abscisic acid (ABA) signaling to regulate stomatal closure and seed germination in Arabidopsis. Genetically or exogenously manipulating PAP bypasses the canonical signaling components ABA Insensitive 1 (ABI1) and Open Stomata 1 (OST1); priming an alternative pathway that restores ABA-responsive gene expression, ROS bursts, ion channel function, stomatal closure and drought tolerance in ost1-2...
March 21, 2017: ELife
https://www.readbyqxmd.com/read/28323561/immobilization-of-asiatic-black-bears-ursus-thibetanus-with-medetomidine-zolazepam-tiletamine-in-south-korea
#10
Dong-Hyuk Jeong, Jeong-Jin Yang, Seong-Hoon Seok, Byeung-Cheul Song, Seong-Chan Yeon
The Asiatic black bear ( Ursus thibetanus ; ABB) is a globally endangered species for which a restoration program has been ongoing in South Korea since 2001. However, there is little information on immobilization protocols for ABBs. We evaluated the use of medetomidine-zolazepam-tiletamine for their immobilization. During 2005-2013, we anesthetized 60 ABBs (32 males, 28 females; 7 mo to 12 yr old) with medetomidine 0.03-0.045 mg/kg and zolazepam-tiletamine 1.54-2.3 mg/kg; reversal of anesthesia was done with atipamezole 0...
March 21, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28322724/valosin-containing-protein-vcp-p97-inhibitors-relieve-mitofusin-dependent-mitochondrial-defects-due-to-vcp-disease-mutants
#11
Ting Zhang, Prashant Mishra, Bruce Hay, David Chan, Ming Guo
Missense mutations of valosin-containing protein (VCP) cause an autosomal dominant disease known as inclusion body myopathy, Paget disease with frontotemporal dementia (IBMPFD) and other neurodegenerative disorders. The pathological mechanism of IBMPFD is not clear and there is no treatment. We show that endogenous VCP negatively regulates Mitofusin, which is required for outer mitochondrial membrane fusion. Because 90% of IBMPFD patients have myopathy, we generated an in vivo IBMPFD model in adult Drosophila muscle, which recapitulates disease pathologies...
March 21, 2017: ELife
https://www.readbyqxmd.com/read/28320200/clinical-and-biological-features-of-interval-colorectal-cancer
#12
Yu Mi Lee, Kyu Chan Huh
Interval colorectal cancer (I-CRC) is defined as a CRC diagnosed within 60 months after a negative colonoscopy, taking into account that 5 years is the "mean sojourn time." It is important to prevent the development of interval cancer. The development of interval colon cancer is associated with female sex, old age, family history of CRC, comorbidities, diverticulosis, and the skill of the endoscopist. During carcinogenesis, sessile serrated adenomas/polyps (SSA/Ps) share many genomic and colonic site characteristics with I-CRCs...
March 21, 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28320151/takotsubo-cardiomyopathy-in-amyotrophic-lateral-sclerosis
#13
Seok-Jin Choi, Yoon-Ho Hong, Je-Young Shin, Byung-Nam Yoon, Sung-Yeon Sohn, Chan Soon Park, Jung-Joon Sung
OBJECTIVE: To investigate the frequency, features, and prognosis of takotsubo cardiomyopathy (TTC) in patients with amyotrophic lateral sclerosis (ALS). METHODS: We reviewed detailed clinical, laboratory, and cardiovascular data from 64 ALS patients (38 men and 26 women) who underwent echocardiographic evaluation for various reasons at a single referral center between January 2011 and December 2015. RESULTS: TTC was diagnosed in 9 ALS patients (4 men and 5 women)...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28320080/interlaboratory-trial-for-the-measurement-of-total-cobalt-in-equine-urine-and-plasma-by-icp-ms
#14
Marie-Agnes Popot, Emmie N M Ho, Natali Stojiljkovic, Florian Bagilet, Pierre Remy, Pascal Maciejewski, Benoit Loup, George H M Chan, Sabine Hargrave, Rick M Arthur, Charlie Russo, James White, Pamela Hincks, Clive Pearce, George Ganio, Paul Zahra, David Batty, Mark Jarrett, Lydia Brooks, Lise-Anne Prescott, Ludovic Bailly-Chouriberry, Yves Bonnaire, Terence S M Wan
Cobalt is an essential mineral micronutrient and is regularly present in equine nutritional and feed supplements. Therefore, cobalt is naturally present at low concentrations in biological samples. The administration of cobalt chloride is considered to be blood doping and is thus prohibited. In order to control the misuse of cobalt, it was mandatory to establish an international threshold for cobalt in plasma and/or in urine. To achieve this goal an international collaboration, consisting of an interlaboratory comparison, between 5 laboratories for the urine study and 8 laboratories for the plasma study has been undertaken...
March 20, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28319871/autoantibodies-and-immune-complexes-to-oxidation-specific-epitopes-and-progression-of-aortic-stenosis-results-from-the-astronomer-trial
#15
Romain Capoulade, Kwan L Chan, Patrick Mathieu, Yohan Bossé, Jean G Dumesnil, James W Tam, Koon K Teo, Xiaohong Yang, Joseph L Witztum, Benoit J Arsenault, Jean-Pierre Després, Philippe Pibarot, Sotirios Tsimikas
BACKGROUND AND AIMS: Elevated levels of lipoprotein(a) [Lp(a)] and oxidized phospholipids on apolipoprotein B-100 (OxPL-apoB) predict the progression of pre-existing mild-to-moderate calcific aortic valve stenosis (CAVS). Whether indirect markers of oxidation-specific epitopes (OSE) are also predictive is not known. The association between IgG and IgM autoantibodies and malondialdehyde-modified low density lipoprotein (MDA-LDL) and IgG and IgM apolipoprotein B immune complexes (apoB-IC), and the hemodynamic progression rate of CAVS was determined in the ASTRONOMER (Aortic Stenosis Progression Observation: Measuring Effects of Rosuvastatin, NCT00800800) trial...
March 9, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28319570/microcystic-elongated-and-fragmented-pattern-invasion-in-ovarian-endometrioid-carcinoma-immunohistochemical-profile-and-prognostic-implications
#16
Allison Goldberg, Lauren Hand, Dan DeCotiis, Norman Rosenblum, Joanna Chan
Microcystic, elongated, and fragmented (MELF) pattern invasion is a poor prognostic indicator in uterine endometrioid carcinoma, but its existence, biology, and prognostic value have not been described in ovarian endometrioid carcinoma. We evaluated cases of ovarian endometrioid carcinoma without synchronous uterine endometrioid carcinoma for MELF and other histologic features. To evaluate tumor biology, we assessed an immunohistochemical profile, including MLH1, PMS2, MSH2, MSH6, β-catenin, e-cadherin, CK19, and cyclin D1...
March 17, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28319555/a-supraclavicular-fossa-ultrasound-window-for-central-venous-catheter-positioning
#17
Se-Chan Kim, Ingo Gräff, Stefan Weber
No abstract text is available yet for this article.
April 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28319431/evaluation-of-the-risk-factors-for-a-rotator-cuff-retear-after-repair-surgery
#18
Yeong Seok Lee, Jeung Yeol Jeong, Chan-Deok Park, Seung Gyoon Kang, Jae Chul Yoo
BACKGROUND: A retear is a significant clinical problem after rotator cuff repair. However, no study has evaluated the retear rate with regard to the extent of footprint coverage. PURPOSE: To evaluate the preoperative and intraoperative factors for a retear after rotator cuff repair, and to confirm the relationship with the extent of footprint coverage. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Data were retrospectively collected from 693 patients who underwent arthroscopic rotator cuff repair between January 2006 and December 2014...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28319368/comparative-analysis-reveals-furoyl-in-vivo-selective-hydroxyl-acylation-analyzed-by-primer-extension-reagents-form-stable-ribosyl-ester-adducts
#19
Dalen Chan, Chao Feng, Yuran Zhen, Ryan A Flynn, Robert C Spitale
RNA molecules depend on structural elements that are critical for cellular function. Chemical methods for probing RNA structure have emerged as a necessary component of characterizing RNA function. As such, understanding the limitations and idiosyncrasies of these methods is essential for their utility. Selective hydroxyl acylation has emerged as a common method for analyzing RNA structure. Ester products as a result of 2'-hydroxyl acylation can then be identified through reverse transcription or mutational enzyme profiling...
March 21, 2017: Biochemistry
https://www.readbyqxmd.com/read/28319160/psychometric-assessment-of-the-chinese-version-of-the-brief-illness-perception-questionnaire-in-breast-cancer-survivors
#20
Na Zhang, Richard Fielding, Inda Soong, Karen K K Chan, Conrad Lee, Alice Ng, Wing Kin Sze, Janice Tsang, Victor Lee, Wendy Wing Tak Lam
OBJECTIVE: The eight-item Brief Illness Perception Questionnaire (B-IPQ) supposedly evaluates cognitive and emotional representations of illness. This study examined the validity and reliability of a traditional Chinese version of the B-IPQ in Hong Kong Chinese breast cancer survivors. METHODS: 358 Chinese breast cancer survivors who had recently ended their primary treatment completed this B-IPQ Chinese version. Confirmatory factor analysis (CFA) tested the factor structure...
2017: PloS One
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