keyword
https://read.qxmd.com/read/38643456/improving-the-production-of-carbamoyltobramycin-by-an-industrial-streptoalloteichus-tenebrarius-through-metabolic-engineering
#1
JOURNAL ARTICLE
Yun Feng, Yiqi Jiang, Xutong Chen, Li Zhu, Hailong Xue, Mianbin Wu, Lirong Yang, Haoran Yu, Jianping Lin
Tobramycin is an essential and extensively used broad-spectrum aminoglycoside antibiotic obtained through alkaline hydrolysis of carbamoyltobramycin, one of the fermentation products of Streptoalloteichus tenebrarius. To simplify the composition of fermentation products from industrial strain, the main byproduct apramycin was blocked by gene disruption and constructed a mutant mainly producing carbamoyltobramycin. The generation of antibiotics is significantly affected by the secondary metabolism of actinomycetes which could be controlled by modifying the pathway-specific regulatory proteins within the cluster...
April 21, 2024: Applied Microbiology and Biotechnology
https://read.qxmd.com/read/38634289/engineering-of-the-lrp-asnc-type-transcriptional-regulator-decr-as-a-genetically-encoded-biosensor-for-multilevel-optimization-of-l-cysteine-biosynthesis-pathway-in-escherichia-coli
#2
JOURNAL ARTICLE
Zhiyou Zhou, Zonglin Li, Yahui Zhong, Shuai Xu, Zhimin Li
L-cysteine is an important sulfur-containing amino acid being difficult to produce by microbial fermentation. Due to the lack of high-throughput screening methods, existing genetically engineered bacteria have been developed by simply optimizing the expression of L-cysteine-related genes one by one. To overcome this limitation, in this study, a biosensor-based approach for multilevel biosynthetic pathway optimization of L-cysteine from the DecR regulator variant of Escherichia coli was applied. Through protein engineering, we obtained the DecRN29Y/C81E/M90Q/M99E variant-based biosensor with improved specificity and an 8...
April 18, 2024: Biotechnology and Bioengineering
https://read.qxmd.com/read/38633564/sparse-deep-neural-network-for-encoding-and-decoding-the-structural-connectome
#3
JOURNAL ARTICLE
Satya P Singh, Sukrit Gupta, Jagath C Rajapakse
Brain state classification by applying deep learning techniques on neuroimaging data has become a recent topic of research. However, unlike domains where the data is low dimensional or there are large number of available training samples, neuroimaging data is high dimensional and has few training samples. To tackle these issues, we present a sparse feedforward deep neural architecture for encoding and decoding the structural connectome of the human brain. We use a sparsely connected element-wise multiplication as the first hidden layer and a fixed transform layer as the output layer...
2024: IEEE Journal of Translational Engineering in Health and Medicine
https://read.qxmd.com/read/38631210/effect-of-ultrasound-assisted-h-2-o-2-vc-treatment-on-the-hyperbranched-lignosus-rhinocerotis-polysaccharide-structures-hydrophobic-microdomains-and-antitumor-activity
#4
JOURNAL ARTICLE
Wudan Cai, Yangchao Luo, Jingyi Xue, Ruotong Guo, Qilin Huang
The effect of ultrasonic intensity (28.14, 70.35, and 112.56 W/cm2 ) on Lignosus rhinocerotis polysaccharide (LRP) degraded by ultrasound assisted H2 O2 /Vc system (U-H/V) was investigated. U-H/V broke the molecular chain of LRP and improved the conformational flexibility, decreasing the molecular weight, intrinsic viscosity ([η]) and particle size. The functional groups and hyperbranched structure of LRP were almost stable after U-H/V treatment, however, the triple helix structure of LRP was partially disrupted...
April 16, 2024: Food Chemistry
https://read.qxmd.com/read/38625027/insulin-signaling-differentially-regulates-the-trafficking-of-insulin-and-amyloid-beta-peptides-at-the-blood-brain-barrier
#5
JOURNAL ARTICLE
Andrew L Zhou, Suresh K Swaminathan, Vrishali S Salian, Lushan Wang, Geoffry L Curran, Hoon-Ki Min, Val J Lowe, Karunya K Kandimalla
The blood-brain barrier (BBB) is instrumental in clearing toxic metabolites from the brain, such as amyloid-β (Aβ) peptides, and in delivering essential nutrients to the brain, like insulin. In Alzheimer's disease (AD) brain, increased Aβ levels are paralleled by decreased insulin levels, which are accompanied by insulin signaling deficits at the BBB. Thus, we investigated the impact of insulin-like growth factor and insulin receptor (IGF1R and IR) signaling on Aβ and insulin trafficking at the BBB...
April 16, 2024: Molecular Pharmaceutics
https://read.qxmd.com/read/38617311/is-prm-based-peptide-targeting-informed-by-long-read-sequencing-for-alternative-proteome-detection
#6
Jennifer A Korchak, Erin D Jeffery, Saikat Bandyopadhyay, Ben T Jordan, Micah Lehe, Emily F Watts, Aidan Fenix, Mathias Wilhelm, Gloria M Sheynkman
Alternative splicing is a major contributor of transcriptomic complexity, but the extent to which transcript isoforms are translated into stable, functional protein isoforms is unclear. Furthermore, detection of relatively scarce isoform-specific peptides is challenging, with many protein isoforms remaining uncharted due to technical limitations. Recently, a family of advanced targeted MS strategies, termed internal standard parallel reaction monitoring (IS-PRM), have demonstrated multiplexed, sensitive detection of pre-defined peptides of interest...
April 1, 2024: bioRxiv
https://read.qxmd.com/read/38615782/an-explainable-multiscale-lstm-model-with-wavelet-transform-and-layer-wise-relevance-propagation-for-daily-streamflow-forecasting
#7
JOURNAL ARTICLE
Lizhi Tao, Zhichao Cui, Yufeng He, Dong Yang
Developing an accurate and reliable daily streamflow forecasting model is important for facilitating the efficient resource planning and management of hydrological systems. In this study, an explainable multiscale long short-term memory (XM-LSTM) model is proposed for effective daily streamflow by integrating the à trous wavelet transform (ATWT) for decomposing data, the Boruta algorithm for identifying model inputs, and the layer-wise relevance propagation (LRP) for explaining the prediction results. The proposed XM-LSTM is tested by performing multi-step-ahead forecasting of daily streamflow at four stations in the middle and lower reaches of the Yangtze River basin and compared with the X-LSTM...
April 12, 2024: Science of the Total Environment
https://read.qxmd.com/read/38614038/multi-objective-location-routing-optimization-based-on-machine-learning-for-green-municipal-waste-management
#8
JOURNAL ARTICLE
Yunyun Niu, Chang Xu, Shubing Liao, Shuai Zhang, Jianhua Xiao
Most of the existing municipal waste management (MWM) systems focus on the optimization of the waste disposal center locations and waste collection paths, which can be modeled based on the location-routing problem (LRP). This study models a green MWM system by a three-objective location-routing problem to achieve equilibrium among the total cost, carbon emission, and residential satisfaction. The amount of waste demand for each customer is considered as an independent discrete random variable following a normal distribution...
April 12, 2024: Waste Management
https://read.qxmd.com/read/38607718/disentangled-explanations-of-neural-network-predictions-by-finding-relevant-subspaces
#9
JOURNAL ARTICLE
Pattarawat Chormai, Jan Herrmann, Klaus-Robert Muller, Gregoire Montavon
Explainable AI aims to overcome the black-box nature of complex ML models like neural networks by generating explanations for their predictions. Explanations often take the form of a heatmap identifying input features (e.g. pixels) that are relevant to the model's decision. These explanations, however, entangle the potentially multiple factors that enter into the overall complex decision strategy. We propose to disentangle explanations by extracting at some intermediate layer of a neural network, subspaces that capture the multiple and distinct activation patterns (e...
April 12, 2024: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://read.qxmd.com/read/38592321/correction-van-veelen-et-al-first-in-human-drug-eluting-balloon-treatment-of-vulnerable-lipid-rich-plaques-rationale-and-design-of-the-debut-lrp-study-j-clin-med-2023-12-5807
#10
Anna van Veelen, I Tarik Küçük, Federico H Fuentes, Yirga Kahsay, Hector M Garcia-Garcia, Ronak Delewi, Marcel A M Beijk, Alexander W den Hartog, Maik J Grundeken, M Marije Vis, José P S Henriques, Bimmer E P M Claessen
In the original publication [...].
March 4, 2024: Journal of Clinical Medicine
https://read.qxmd.com/read/38579480/neuroelectric-indices-of-pre-motor-planning-and-adiposity-are-selectively-related-to-balance-in-children
#11
JOURNAL ARTICLE
Shelby A Keye, Christopher J Kinder, Laura M Rosok, Corinne N Cannavale, Anne Walk, Naiman A Khan
BACKGROUND: Motor function and weight status are components of physical fitness that have been implicated in childhood motor and cognitive development. The lateralized readiness potential (LRP), an index of motor planning and action, can provide context surrounding relationships between fitness and brain activity underlying cognitive and motor functions. This study evaluated the relationship between the LRP and motor skills, as well as associations between weight status and neural and behavioral motor functions...
April 4, 2024: Human Movement Science
https://read.qxmd.com/read/38572570/ten-year-functional-and-oncological-outcomes-of-a-prospective-randomized-controlled-trial-comparing-laparoscopic-versus-robot-assisted-radical-prostatectomy
#12
JOURNAL ARTICLE
Enrico Checcucci, Sabrina De Cillis, Eugenio Alladio, Federico Piramide, Gabriele Volpi, Stefano Granato, Davide Zamengo, Gabriele Bignante, Daniele Amparore, Alberto Piana, Matteo Manfredi, Edoardo Vallariello, Ilaria Stura, Michele Di Dio, Riccardo Autorino, Francesco Porpiglia, Cristian Fiori
BACKGROUND: Among prostate cancer (PCa) treatment options, mini-invasive surgical approaches have gained a wide diffusion in the last decades. The aim of this study was to present oncological, functional, and quality of life data after 10 years of follow-up of a prospective randomized controlled trial (RCT) (ISRCTN11552140) comparing robot-assisted radical prostatectomy (RARP) versus laparoscopic radical prostatectomy (LRP) for the treatment of PCa. METHODS: Patients with localized PCa were randomized to undergo LRP or RARP between January 2010 and January 2011...
April 4, 2024: Prostate
https://read.qxmd.com/read/38568394/type-1-fimbrial-phase-variation-in-multidrug-resistant-asymptomatic-uropathogenic-escherichia-coli-clinical-isolates-upon-adherence-to-htb-4-cells
#13
JOURNAL ARTICLE
Arunita Ghosh, Mandira Mukherjee
The adherence of bladder uroepithelial cells, subsequent expression, and regulation of type 1 fimbrial genes (key mediator of attachment) in clinical multidrug-resistant uropathogenic Escherichia coli (MDR-UPECs) isolated from individuals with asymptomatic bacteriuria (ABU) remain unexplored till date. Therefore, this study aimed to investigate the underlying molecular mechanisms associated with the adherence of clinical MDR-ABU-UPECs to human a uroepithelial cell line (HTB-4), both in the absence and presence of D-Mannose...
April 3, 2024: Folia Microbiologica
https://read.qxmd.com/read/38520130/triggered-by-your-heart-effects-of-cardioafferent-traffic-and-stress-on-automatic-responses-in-a-simon-task
#14
JOURNAL ARTICLE
Leon von Haugwitz, Edmund Wascher, Mauro F Larra
Variations in cardioafferent traffic are relayed to the brain via arterial baroreceptors and have been shown to modulate perceptual processing. However, less is known about the cognitive-behavioral consequences of these effects and their role during stress. Here, we investigated in how far automatic responses during the Simon task were modulated by exposure to a laboratory stressor and the different phases of the cardiac cycle. In this study, 30 participants performed three blocks of a combined horizontal and vertical Simon task, which is characterized by either sensorimotor or cognitive response conflicts, respectively...
March 22, 2024: Psychophysiology
https://read.qxmd.com/read/38509620/enhancing-precision-medicine-a-nomogram-for-predicting-platinum-resistance-in-epithelial-ovarian-cancer
#15
JOURNAL ARTICLE
Ruyue Li, Zhuo Xiong, Yuan Ma, Yongmei Li, Yu'e Yang, Shaohan Ma, Chunfang Ha
BACKGROUND: This study aimed to develop a novel nomogram that can accurately estimate platinum resistance to enhance precision medicine in epithelial ovarian cancer(EOC). METHODS: EOC patients who received primary therapy at the General Hospital of Ningxia Medical University between January 31, 2019, and June 30, 2021 were included. The LASSO analysis was utilized to screen the variables which contained clinical features and platinum-resistance gene immunohistochemistry scores...
March 21, 2024: World Journal of Surgical Oncology
https://read.qxmd.com/read/38507874/peripheral-amyloid-%C3%AE-clearance-mediates-cognitive-impairment-in-non-alcoholic-fatty-liver-disease
#16
JOURNAL ARTICLE
Xiaobo Peng, Xing Zhang, Zihui Xu, Linyan Li, Xiaoxing Mo, Zhao Peng, Zhilei Shan, Hong Yan, Jian Xu, Liegang Liu
BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is a prevalent risk factor for cognitive impairment. Cerebral amyloid-β (Aβ) accumulation, as an important pathology of cognitive impairment, can be caused by impaired Aβ clearance in the periphery. The liver is the primary organ for peripheral Aβ clearance, but the role of peripheral Aβ clearance in NAFLD-induced cognitive impairment remains unclear. METHODS: We examined correlations between NAFLD severity, Aβ accumulation, and cognitive performance in female Sprague-Dawley rats...
March 19, 2024: EBioMedicine
https://read.qxmd.com/read/38504535/efficacy-of-sailuotong-on-neurovascular-unit-in-amyloid-precursor-protein-presenilin-1-transgenic-mice-with-alzheimer-s-disease
#17
JOURNAL ARTICLE
Sun Linjuan, L I Chengfu, Liu Jiangang, L I Nannan, Han Fuhua, Qiao Dandan, Tao Zhuang, Zhan Min, Chen Wenjie, Zhang Xiaohui, Tong Chenguang, Chen Dong, Qi Jiangxia, Liu Yang, Liang Xiao, Zheng Xiaoying, Zhang Yunling
OBJECTIVE: To discuss the influence of Sailuotong (, SLT) on the Neurovascular Unit (NVUs) of amyloid precursor protein (APP)/presenilin-1(PS1) mice and evaluate the role of gas supplementation in activating blood circulation during the progression of Alzheimer's disease (AD). METHODS: The mice were allocated into the following nine groups: (a) the C57 Black (C57BL) sham-operated group (control group), (b) ischaemic treatment in C57BL mice (the C57 ischaemic group), (c) the APP/PS1 sham surgery group (APP/PS1 model group), (d) ischaemic treatment in APP/PS1 mice (APP/PS1 ischaemic group), (e) C57BL mice treated with aspirin following ischaemic treatment (C57BL ischaemic + aspirin group), (f) C57BL mice treated with SLT following ischaemic treatment (C57BL ischaemic + SLT group), (g) APP/PS1 mice treated with SLT (APP/PS1 + SLT group), (h) APP/PS1 mice treated with donepezil hydrochloride following ischaemic treatment (APP/PS1 ischaemic + donepezil hydrochloride group) and (i) APP/PS1 mice treated with SLT following ischaemic treatment (APP/PS1 ischaemic + SLT group)...
April 2024: Journal of Traditional Chinese Medicine
https://read.qxmd.com/read/38501694/accumulation-of-lewy-related-pathology-starts-in-middle-age-the-tampere-sudden-death-study
#18
JOURNAL ARTICLE
Eloise H Kok, Anders Paetau, Mika Martiskainen, Leo-Pekka Lyytikäinen, Terho Lehtimäki, Pekka Karhunen, Liisa Myllykangas
When effective treatments against neurodegenerative diseases become a reality, it will be important to know the age these pathologies begin to develop. We investigated alpha-synuclein pathology in brain tissue of the Tampere Sudden Death Study-unselected forensic autopsies on individuals living outside hospital institutions in Finland. Of 562 (16-95 years) participants, 42 were positive for Lewy-related pathology (LRP). The youngest LRP case was aged 54 years, and the frequency of LRP in individuals aged ≥50 years was 9%...
March 19, 2024: Annals of Neurology
https://read.qxmd.com/read/38492077/improved-early-continence-following-laparoscopic-radical-prostatectomy-the-urethral-hammock-technique
#19
JOURNAL ARTICLE
Gernot Ortner, Hanne-Rose Honis, Julia Böhm, Marko Konschake, Theodoros Tokas, Udo Nagele
PURPOSE: To introduce and illustrate a novel urethral reconstruction technique-the 'urethral hammock-technique'-and to assess its impact on early postoperative continence following laparoscopic radical prostatectomy (LRP). METHODS: 119 patients who underwent LRP between January 2020 and May 2022 (hammock group: n = 43, control group: n = 76) were included in the study. The primary outcome was continence (zero pads or max. one security pad) at 1, 3, and 6 months following surgery...
March 16, 2024: World Journal of Urology
https://read.qxmd.com/read/38488124/apolipoprotein-e-containing-lipoproteins-and-their-extracellular-interactions-with-lrp1-affect-lps-induced-inflammation
#20
JOURNAL ARTICLE
Shogo Akahane, Hiroto Matsuura, Takahiro Kaido, Yoko Usami, Nau Ishimine, Takeshi Uehara, Kazuyoshi Yamauchi
The linkage between low-density lipoprotein receptor-related protein (LRP)1-mediated metabolism of apolipoprotein (apo) E-containing lipoproteins (apoE-LP) and the lipopolysaccharide (LPS)-induced inflammatory response contributes to the pathogenesis of sepsis; however, the underlying mechanisms are unclear. Therefore, in this study, the effects of apoE-LP and their constituents on the mRNA expression of interleukin (IL)-6 and LRP1 were evaluated using a culture system of human fibroblasts supplemented with LPS and apoE-containing emulsion particles (apoE-EP)...
March 18, 2024: Biological Chemistry
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