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https://www.readbyqxmd.com/read/28654428/residual-pure-intralymphatic-breast-carcinoma-following-neoadjuvant-chemotherapy-is-indicative-of-poor-clinical-outcome-even-in-node-negative-patients
#1
Esther Cheng, David Ko, Michaela Nguyen, Tracy-Ann Moo, Eleni Andreopoulou, Syed A Hoda, Timothy M D'Alfonso
Residual carcinoma confined to lymphovascular spaces following neoadjuvant chemotherapy (NAC) for invasive breast carcinoma is an uncommon finding. We studied pathologic features and outcome for patients with pure intralymphatic carcinoma (PIC) following NAC, a pattern of residual disease reported to have a poor outcome in the only previously published series of this entity. Six of 284 (2.1%) patients treated with NAC were studied. All 6 patients had axillary lymph node involvement before NAC. Tumors were triple-negative (n=3) and HER2+ (n=3: 2 ER+, 1 ER-)...
June 26, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28653879/tp53-alteration-determines-the-combinational-cytotoxic-effect-of-doxorubicin-and-an-antioxidant-nac
#2
Yun Sun Lee, Young Joon Choi, JeeYun Lee, Da Mi Shim, Woong-Yang Park, Sung Wook Seo
The anticancer effect of doxorubicin is closely related to the generation of reactive oxygen species. On the contrary, doxorubicin-induced reactive oxygen species induces heart failure, a critical side effect of doxorubicin. Antioxidant supplementation has been proposed to reduce the side effects. However, the use of antioxidants may hamper the anticancer effect of doxorubicin. In this study, doxorubicin-induced reactive oxygen species was shown to differentially affect cancer cells based on their TP53 genetic status; doxorubicin-induced apoptosis was attenuated by an antioxidant, N-acetylcysteine, in TP53 wild cells; however, N-acetylcysteine caused a synergistic increase in the apoptosis rate in TP53-altered cells...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28653666/endocannabinoid-regulation-of-reward-and-reinforcement-through-interaction-with-dopamine-and-endogenous-opioid-signaling
#3
J M Wenzel, J F Cheer
The endocannabinoid system (eCB) is implicated in the mediation of both reward and reinforcement. This is evidenced by the ability of exogenous cannabinoid drugs to produce hedonia and maintain self-administration in both human and animal subjects. eCBs similarly facilitate behaviors motivated by reward through interaction with the mesolimbic dopamine (DA) and endogenous opioid systems. Indeed, eCB signaling in the ventral tegmental area (VTA) stimulates activation of midbrain DA cells and promotes DA release in terminal regions such as the nucleus accumbens (NAc)...
June 27, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28650607/self-diffusion-driven-ultrafast-detection-of-ppm-level-nitro-aromatic-pollutants-in-aqueous-media-using-a-hydrophilic-fluorescent-paper-sensor
#4
Wei Lu, Jiawei Zhang, Youju Huang, Patrick Theato, Qing Huang, Tao Chen
Development of fluorescent film probes for toxic nitro aromatic compound pollutants (NACs) such as 2,4,6-trinitrotoluene (TNT) in real water samples implies broad applications in environmental and industrial safety control. Despite many recent advances, there are still some difficult challenges facing this area, e.g., the restricted sensitivity and long response time caused by hindered and slow diffusion of aqueous NACs samples inside a dense, solid film. Hence, we report herein a robust fluorescent paper sensor with improved sensing abilities, which is prepared by absorbing hydrophilic pyrene-functionalized polymer uniformly into cellulose-based filter papers...
June 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28650403/the-classic-pitanguy-s-technique-and-its-modifications-in-mammaplasty-ten-years-of-experiences
#5
Harris Zavrides
BACKGROUND: Mammaplasty surgery has been modified in the past few years, as plastic surgeons worked to improve and maintain the breast shape and especially the "bottoming out" of the gland. The classic Pitanguy's technique has been shown to be an anatomically safe technique in the management of the breast. However, as first described, cannot be applied in gigantomastia or in severe breast ptosis cases or in cases of dense breast parenchyma or for a long-lasting breast lift result. Using 2 different modifications, the Pitanguy technique can be applied for breasts of all sizes and for all cases of breast ptosis...
June 23, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28649093/ntl8-regulates-trichome-formation-in-arabidopsis-by-directly-activating-r3-myb-genes-try-and-tcl1
#6
Hainan Tian, Xianling Wang, Hongyan Guo, Yuxin Cheng, Chunjiang Hou, Jin-Gui Chen, Shucai Wang
The NAM, ATAF1/2, and CUC (NAC) are plant-specific transcription factors that regulate multiple aspects of plant growth and development, and plant response to environmental stimuli. We report here the identification of NTM1-LIKE 8 (NTL8), a membrane-associated NAC transcription factor, as a novel regulator of trichome formation in Arabidopsis. From an activation-tagged Arabidopsis population, we identified a dominant, gain-of-function mutant with glabrous inflorescence stem. By using plasmid rescue and RT-PCR analyses, we found that NTL8 was tagged, thus the mutant was named ntl8-1 Dominant (ntl8-1D)...
June 25, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28648939/prognostic-impact-of-egfr-and-cytokeratin-5-6-immunohistochemical-expression-in-triple-negative-breast-cancer
#7
Aziza E Abdelrahman, Hayam E Rashed, Mohamed Abdelgawad, Mohamed I Abdelhamid
Triple-negative breast cancer (TNBC) has an aggressive behavior and limited therapeutic options due to lack of targeted therapy. We aimed in this study to assess the immunohistochemical expression of EGFR and cytokeratin 5/6 and their ability to predict survival and response to neoadjuvant chemotherapy (NAC) among triple-negative breast cancer patients. Thirty-five cases with TNBC were studied by immunohistochemistry for EGFR and CK5/6 expression. Data on overall survival (OS), disease-free survival (DFS) and response to NAC were collected...
June 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28646331/textural-features-of-18-f-fdg-pet-after-two-cycles-of-neoadjuvant-chemotherapy-can-predict-pcr-in-patients-with-locally-advanced-breast-cancer
#8
Lin Cheng, Jianping Zhang, Yujie Wang, Xiaoli Xu, Yongping Zhang, Yingjian Zhang, Guangyu Liu, Jingyi Cheng
OBJECTIVE: This study was designed to evaluate the utility of textural features for predicting pathological complete response (pCR) to neoadjuvant chemotherapy (NAC). METHODS: Sixty-one consecutive patients with locally advanced breast cancer underwent (18)F-FDG PET/CT scanning at baseline and after the second course of NAC. Changes to imaging parameters [maximum standardized uptake value (SUVmax), metabolic tumor volume (MTV), total lesion glycolysis (TLG)] and textural features (entropy, coarseness, skewness) between the 2 scans were measured by two independent radiologists...
June 23, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28644070/particulate-matter-disrupts-human-lung-endothelial-cell-barrier-integrity-via-rho-dependent-pathways
#9
Ting Wang, Yuka Shimizu, Xiaomin Wu, Gabriel T Kelly, Xiaoyan Xu, Lichun Wang, Zhongqing Qian, Yin Chen, Joe G N Garcia
Increased exposure to ambient particulate matter (PM) is associated with elevated morbidity and mortality in patients with cardiopulmonary diseases and cancer. We and others have shown that PM induces lung microvascular barrier dysfunction which potentially enhances the systemic toxicity of PM. However, the mechanisms by which PM disrupts vascular endothelial integrity remain incompletely explored. We hypothesize that PM induces endothelial cell (EC) cytoskeleton rearrangement via Rho GTPase-dependent pathways to facilitate vascular hyperpermeability...
June 23, 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28644049/the-standard-treatment-protocol-for-paracetamol-poisoning-may-be-inadequate-following-overdose-with-modified-release-formulation-a-pharmacokinetic-and-clinical-analysis-of-53-cases
#10
Heléne Salmonson, Gunilla Sjöberg, Jacob Brogren
OBJECTIVE: The use of the standard procedure for managing overdoses with immediate release (IR) paracetamol is questionable when applied to overdoses with modified release (MR) formulations. This study describes the pharmacokinetics of paracetamol and the clinical outcomes following overdoses with a MR formulation. METHODS: Medical records including laboratory analyses concerning overdoses of MR paracetamol from 2009 to 2015 were collected retrospectively. Inclusion criteria were ingestion of a toxic dose, known time of intake and documented measurements of serum paracetamol and liver function tests...
June 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28642847/heat-labile-enterotoxin-induced-perk-chop-pathway-activation-causes-intestinal-epithelial-cell-apoptosis
#11
Xi Lu, Chunmeng Li, Congcong Li, Pengcheng Li, Enqing Fu, Yonghong Xie, Faguang Jin
Enterotoxigenic Escherichia coli (ETEC) is a leading cause of diarrhea among children and travelers in developing countries, and heat-labile enterotoxin (LT) is one of the most important virulence factors. The pathogenesis of and virulence factors associated with ETEC have been well-characterized; however, the extent to which ETEC damages host cells remains unclear. In this study, we found that LT could induce decreases in intestinal epithelial cell viability and induce apoptosis in a dose- and time- dependent manner in both HCT-8 and Caco-2 cells...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28641207/ros-and-calcium-signaling-mediated-pathways-involved-in-stress-responses-of-the-marine-microalgae-dunaliella-salina-to-enhanced-uv-b-radiation
#12
Xinxin Zhang, Xuexi Tang, Ming Wang, Wei Zhang, Bin Zhou, You Wang
UV-B ray has been addressed to trigger common metabolic responses on marine microalgae, however, the upstream events responsible for these changes in marine microalgae are poorly understood. In the present study, a species of marine green microalgae Dunaliella salina was exposed to a series of enhanced UV-B radiation ranging from 0.25 to 1.00 KJ·m(-2) per day. The role of ROS and calcium signaling in the D. salina responses to UV-B was discussed. Results showed that enhanced UV-B radiation markedly decreased the cell density in a dose-dependent manner, but the contents of protein and glycerol that were essential for cell growth increased...
May 28, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28640975/nac-transcription-factor-jungbrunnen1-enhances-drought-tolerance-in-tomato
#13
Venkatesh P Thirumalaikumar, Vikas Devkar, Nikolay Mehterov, Shawkat Ali, Rengin Ozgur, Ismail Turkan, Bernd Mueller-Roeber, Salma Balazadeh
Water deficit (drought stress) massively restricts plant growth and the yield of crops; reducing the deleterious effects of drought is therefore of high agricultural relevance. Drought triggers diverse cellular processes including the inhibition of photosynthesis, the accumulation of cell-damaging reactive oxygen species, and gene expression reprogramming, besides others. Transcription factors (TF) are central regulators of transcriptional reprogramming and expression of many TF genes is affected by drought, including members of the NAC family...
June 22, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28638397/generation-annotation-and-analysis-of-a-large-scale-expressed-sequence-tag-library-from-arabidopsis-pumila-to-explore-salt-responsive-genes
#14
Xianzhong Huang, Lifei Yang, Yuhuan Jin, Jun Lin, Fang Liu
Arabidopsis pumila is an ephemeral plant, and a close relative of the model plant Arabidopsis thaliana, but it possesses higher photosynthetic efficiency, higher propagation rate, and higher salinity tolerance compared to those A. thaliana, thus providing a candidate plant system for gene mining for environmental adaption and salt tolerance. However, A. pumila is an under-explored resource for understanding the genetic mechanisms underlying abiotic stress adaptation. To improve our understanding of the molecular and genetic mechanisms of salt stress adaptation, more than 19,900 clones randomly selected from a cDNA library constructed previously from leaf tissue exposed to high-salinity shock were sequenced...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28637045/effects-of-injection-of-gamma-aminobutyric-acid-agonists-into-the-nucleus-accumbens-on-naloxone-induced-morphine-withdrawal
#15
Betilay Topkara, Hasan R Yananli, Eren Sakallı, Mahluga Jafarova Demirkapu
AIMS: This study was to investigate the effects of local administration of gamma-aminobutyric acid (GABA) agonists into the nucleus accumbens (NAc) on naloxone-induced morphine withdrawal symptoms. METHODS: Bilateral guide cannulas were stereotaxically implanted in the shell or core regions of the NAc of Sprague-Dawley rats. After a recovery period, 3 morphine pellets, each consisting of 75 mg morphine base, were placed subcutaneously on the first and third days of the study with the rats under mild ether anaesthesia...
June 22, 2017: Pharmacology
https://www.readbyqxmd.com/read/28635235/-the-role-of-postmastectomy-radiotherapy-in-clinical-t1-3n1m0-breast-cancer-patients-with-pathological-negative-lymph-nodes-after-neoadjuvant-chemotherapy-and-mastectomy
#16
Q L Rong, S L Wang, Y Tang, J Jin, Y W Song, W H Wang, Y P Liu, H Fang, H Ren, X F Liu, Z H Yu, Y X Li
Objective: To analyze the outcomes of clinical T1-3N1M0 breast cancer patients with pathological negative axillary lymph nodes (ypN0) after neoadjuvant chemotherapy (NAC) and mastectomy, and investigate the role of postmastectomy radiotherapy (PMRT). Methods: A total of 185 patients with clinical T1-3N1M0 breast cancer treated between 1999 and 2013 were retrospectively reviewed. All patients were treated with NAC and mastectomy, and achieved ypN0. Of them, 89 patients received additional PMRT and 96 patients did not...
June 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28634445/antioxidant-treatment-with-n-acetyl-cysteine-prevents-the-development-of-cognitive-and-social-behavioral-deficits-that-result-from-perinatal-ketamine-treatment
#17
Aarron Phensy, Hasmik E Duzdabanian, Samantha Brewer, Anurag Panjabi, Christopher Driskill, Annuska Berz, George Peng, Sven Kroener
Alterations of the normal redox state can be found in all stages of schizophrenia, suggesting a key role for oxidative stress in the etiology and maintenance of the disease. Pharmacological blockade of N-methyl-D-aspartic acid (NMDA) receptors can disrupt natural antioxidant defense systems and induce schizophrenia-like behaviors in animals and healthy human subjects. Perinatal administration of the NMDA receptor (NMDAR) antagonist ketamine produces persistent behavioral deficits in adult mice which mimic a range of positive, negative, and cognitive symptoms that characterize schizophrenia...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28634219/early-use-of-n-acetylcysteine-nac-with-nitrate-therapy-in-patients-undergoing-primary-percutaneous-coronary-intervention-for-st-segment-elevation-myocardial-infarction-reduces-myocardial-infarct-size-the-naciam-trial
#18
Sivabaskari Pasupathy, Rosanna Tavella, Suchi Grover, Betty Raman, Nathan E K Procter, Yang T Du, Gnanadevan Mahadavan, Irene Stafford, Tamila Heresztyn, Andrew Holmes, Christopher Zeitz, Margaret Arstall, Joseph B Selvanayagam, John D Horowitz, John F Beltrame
Background -Contemporary ST-elevation myocardial infarction (STEMI) management involves primary percutaneous coronary intervention (PCI) with on-going studies focusing on infarct size reduction utilizing ancillary therapies. N-acetylcysteine (NAC) is an antioxidant with reactive oxygen species scavenging properties that also potentiates the effects of nitroglycerin (NTG) and thus represents a potentially beneficial ancillary therapy in primary PCI. The NACIAM (NACIn Acute Myocardial infarction) trial examined the effects of NAC on infarct size in STEMI patients undergoing PCI...
June 20, 2017: Circulation
https://www.readbyqxmd.com/read/28633804/protective-effect-of-n-acetylcysteine-on-progression-to-end-stage-renal-disease-necessity-for-prospective-clinical-trial
#19
Chen-Yi Liao, Chi-Hsiang Chung, Chai-Chao Wu, Fu-Huang Lin, Chang-Huei Tsao, Chih-Chiang Wang, Wu-Chien Chien
BACKGROUND: We aimed to evaluate the potential benefits of N-acetylcysteine (NAC) on the risk of chronic kidney disease (CKD) progression to dialysis-requiring end-stage renal disease (ESRDd). METHODS: In a population-based cohort study of 145,062 individuals, 123,608 CKD patients who were followed up for 10years were included, and CKD patients treated with NAC (ICD-9-CM) were compared with those who were not treated. Using propensity score matching, we analyzed the predictors of CKD progression to ESRDd by Cox proportional hazards regression with adjustments for sex, age, and comorbidities, and evaluated the effect of NAC using cumulative defined daily dose (cDDD)...
June 17, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28633617/simultaneous-determination-of-primary-and-secondary-d-and-l-amino-acids-by-reversed-phase-high-performance-liquid-chromatography-using-pre-column-derivatization-with-two-step-labelling-method
#20
Takehiko Yokoyama, Masaharu Tokuda, Masafumi Amano, Koji Mikami
This work describes a method for the simultaneous determination of primary d- and l-amino acids and secondary amino acids such as d- and l-proline. In order to remove interferences in the simultaneous determination of primary and secondary amines, the primary amines were derivatized with o-phthalaldehyde/N-acetyl-l-cysteine (OPA/NAC) and subsequently with 1-(9-fluorenyl)ethyl chloroformate (FLEC) for secondary amines, in a pre-column separation derivatization technique. These fluorescent diastereomers of the amino acids were obtained within 3 min at room temperature and determined simultaneously by changing wavelengths during analysis in a single eluting run in the high-performance liquid chromatography column...
June 21, 2017: Bioscience, Biotechnology, and Biochemistry
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