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Irreversible Shock

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https://www.readbyqxmd.com/read/29644151/trans-cranial-doppler-as-an-ancillary-study-supporting-irreversible-brain-injury-in-a-post-cardiac-arrest-patient-on-extracorporeal-membrane-oxygenation
#1
Naresh Mullaguri, Aarti Sarwal, Nakul Katyal, Premkumar Nattanamai, Pravin George, Christopher R Newey
Obtaining neuroimaging in patients on cardiopulmonary support devices such as extracorporeal membrane oxygenation (ECMO) can be challenging, given the complexities in monitoring, instrumentation, and associated hemodynamic lability. Transcranial Doppler (TCD) is used as an ancillary test for the assessment of cerebral circulatory arrest, but its use in non-pulsatile blood flow in venoarterial (VA) ECMO is not well described. We report the use of TCD in a patient on VA ECMO post-cardiac arrest for evaluation of death by neurological criteria...
February 6, 2018: Curēus
https://www.readbyqxmd.com/read/29626131/pervasive-contingency-and-entrenchment-in-a-billion-years-of-hsp90-evolution
#2
Tyler N Starr, Julia M Flynn, Parul Mishra, Daniel N A Bolon, Joseph W Thornton
Interactions among mutations within a protein have the potential to make molecular evolution contingent and irreversible, but the extent to which epistasis actually shaped historical evolutionary trajectories is unclear. To address this question, we experimentally measured how the fitness effects of historical sequence substitutions changed during the billion-year evolutionary history of the heat shock protein 90 (Hsp90) ATPase domain beginning from a deep eukaryotic ancestor to modern Saccharomyces cerevisiae We found a pervasive influence of epistasis...
April 6, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29618581/causes-and-predictors-of-30-day-readmission-in-patients-with-acute-myocardial-infarction-and-cardiogenic-shock
#3
Mahek Shah, Shantanu Patil, Brijesh Patel, Manyoo Agarwal, Carlos D Davila, Lohit Garg, Sahil Agrawal, Navin K Kapur, Ulrich P Jorde
BACKGROUND: Acute myocardial infarction (AMI) occurs as a result of irreversible damage to cardiac myocytes secondary to lack of blood supply. Cardiogenic shock complicating AMI has significant associated morbidity and mortality, and data on postdischarge outcomes are limited. METHODS AND RESULTS: We derived the study cohort of patients with AMI and cardiogenic shock from the 2013 to 2014 Healthcare Cost and Utilization Project National Readmission Database. Incidence, predictors, and causes of 30-day readmissions were analyzed...
April 2018: Circulation. Heart Failure
https://www.readbyqxmd.com/read/29602292/heat-shock-proteins-and-cardiovascular-disease
#4
B Rodríguez-Iturbe, R J Johnson
The development of stress drives a host of biological responses that include the overproduction of a family of proteins named heat shock proteins (HSPs), because they were initially studied after heat exposure. HSPs are evolutionarily preserved proteins with a high degree of interspecies homology. HSPs are intracellular proteins that also have extracellular expression. The primary role of HSPs is to protect cell function by preventing irreversible protein damage and facilitating molecular traffic through intracellular pathways...
March 1, 2018: Physiology International
https://www.readbyqxmd.com/read/29596499/specific-protein-carbonylation-in-human-breast-cancer-tissue-compared-to-adjacent-healthy-epithelial-tissue
#5
Baikuntha Aryal, V Ashutosh Rao
Protein carbonylation is an irreversible post-translational modification induced by severe oxidative stress. Reactive oxygen species (ROS) are constantly produced in cells and play important roles in both cancer progression and cancer suppression. ROS levels can be higher in tumor compared to surrounding healthy tissue but ROS-induced specific protein carbonylation and its unique role in cancer progression or suppression is poorly understood. In this study, we utilized previously validated ELISA and western blot methods to analyze the total and specific protein carbonylation in flash-frozen human breast cancer and matched adjacent healthy tissue to compare relative total, and specific protein carbonylation...
2018: PloS One
https://www.readbyqxmd.com/read/29564081/patterns-of-alternative-splicing-vary-between-species-during-heat-stress
#6
Sumetha Kannan, Gillian Halter, Tanya Renner, Elizabeth R Waters
Plants have evolved a variety of mechanisms to respond and adapt to abiotic stress. High temperature stress induces the heat shock response. During the heat shock response a large number of genes are up-regulated, many of which code for chaperone proteins that prevent irreversible protein aggregation and cell death. However, it is clear that heat shock is not the only mechanism involved in the plant heat stress response. Alternative splicing (AS) is also important during heat stress since this post-transcriptional regulatory mechanism can produce significant transcriptome and proteome variation...
March 2018: AoB Plants
https://www.readbyqxmd.com/read/29499399/cancer-cells-biomineralize-ionic-gold-into-nanoparticles-microplates-via-secreting-defense-proteins-with-specific-gold-binding-peptides
#7
Ajay Vikram Singh, Timotheus Jahnke, Vimal Kishore, Byung-Wook Park, Madu Batuwangala, Joachim Bill, Metin Sitti
Cancer cells have the capacity to synthesize nanoparticles (NPs). The detailed mechanism of this process is not very well documented. We report the mechanism of biomineralization of aqueous gold chloride into NPs and microplates in the breast-cancer cell line MCF7. Spherical gold NPs are synthesized in these cells in the presence of serum in the culture media by the reduction of HAuCl4 . In the absence of serum, the cells exhibit gold microplate formation through seed-mediate growth albeit slower reduction...
February 27, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29445820/a-drastic-influence-of-the-anion-nature-and-concentration-on-high-pressure-intrusion-extrusion-of-electrolyte-solutions-in-silicalite-1
#8
A Ryzhikov, H Nouali, T J Daou, J Patarin
High pressure intrusion-extrusion of concentrated solutions of sodium salts in a pure-silica MFI-type zeolite (Silicalite-1) was studied for potential applications in mechanical energy absorption and storage. It was discovered that the anion nature has a drastic influence on the behavior and the energetic performances of "Silicalite-1 - concentrated Na + X - solution" systems, where X = Cl - , Br - , I - , NO 2 - , NO 3 - , ClO 4 - and CrO 4 2- . In the case of NaNO 2 , NaClO 4 , Na 2 CrO 4 , and NaI a combination of bumper and shock-absorber behaviors with a partial irreversible solution intrusion was observed, whereas a fully reversible spring behavior is demonstrated for the intrusion-extrusion of NaBr, NaCl and NaNO 3 solutions...
February 15, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29395201/duration-of-extracorporeal-membrane-oxygenation-support-and-survival-in-cardiovascular-surgery-patients
#9
Klaus Distelmaier, Dominik Wiedemann, Christina Binder, Thomas Haberl, Daniel Zimpfer, Gottfried Heinz, Herbert Koinig, Alessia Felli, Barbara Steinlechner, Alexander Niessner, Günther Laufer, Irene M Lang, Georg Goliasch
OBJECTIVE: The overall therapeutic goal of venoarterial extracorporeal membrane oxygenation (ECMO) in patients with postcardiotomy shock is bridging to myocardial recovery. However, in patients with irreversible myocardial damage prolonged ECMO treatment would cause a delay or even withholding of further permanent potentially life-saving therapeutic options. We therefore assessed the prognostic effect of duration of ECMO support on survival in adult patients after cardiovascular surgery...
December 26, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29390437/chronic-primary-adrenal-insufficiency-after-unilateral-adrenonephrectomy-a-case-report
#10
Satoshi Yoshiji, Kimitaka Shibue, Toshihito Fujii, Takeshi Usui, Keisho Hirota, Daisuke Taura, Mayumi Inoue, Masakatsu Sone, Akihiro Yasoda, Nobuya Inagaki
RATIONALE: Unilateral adrenalectomy as part of surgical resection of renal cell carcinoma (RCC) is not thought to increase the risk of chronic adrenal insufficiency, as the contralateral adrenal gland is assumed to be capable of compensating for the lost function of the resected gland. However, recent studies have indicated that adrenalectomy might cause irreversible impairment of the adrenocortical reserve. We describe a case of chronic primary adrenal insufficiency in a 68-year-old man who previously underwent unilateral adrenonephrectomy, which was complicated by severe postoperative adrenal stress that involved cardiopulmonary disturbance and systemic infection...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29305323/polyhydroxyalkanoates-pha-production-from-phenol-in-an-acclimated-consortium-batch-study-and-impacts-of-operational-conditions
#11
Yi Zhang, Apiredan Wusiman, Xiang Liu, Chunli Wan, Duu-Jong Lee, JooHwa Tay
Microbial intracellular biopolymer PHA was synthesized from toxic pollutant phenol by an acclimated consortium. Various operational conditions were experimented for their effects on biomass growth and PHA accumulation. Carbon to nitrogen ratios from 5 to 40 (w/w) showed little impact, as did the levels of Fe, Ca and Mg in a short term. Acidic pH inhibited both growth and PHA synthesis, and an optimal dissolved oxygen level of 1-4 mg L-1 was identified. Low temperature (7 °C) significantly slowed but did not totally repress microbial activities...
February 10, 2018: Journal of Biotechnology
https://www.readbyqxmd.com/read/29301492/effect-of-grm7-polymorphisms-on-the-development-of-noise-induced-hearing-loss-in-chinese-han-workers-a-nested-case-control-study
#12
Peipei Yu, Jie Jiao, Guoshun Chen, Wenhui Zhou, Huanling Zhang, Hui Wu, Yanhong Li, Guizhen Gu, Yuxin Zheng, Yue Yu, Shanfa Yu
BACKGROUND: Noise-induced hearing loss (NIHL) is a complex, irreversible disease caused by the interaction of genetic and environmental factors. In recent years, a great many studies have been done to explore the NIHL susceptibility genes among humans. So far, high powerful detections have been founded that genes of potassium ion channel genes (KCNQ4 and KCNE1), catalase (CAT), protocadherin 15 (PCDH15), myosin 14 (MYH14) and heart shock protein (HSP70) which have been identified in more than one population may be associated with the susceptibility to NIHL...
January 5, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29290506/thigh-emphysema-as-the-initial-presentation-of-colon-ischemia
#13
Chin-Chuan Hsu, Ping-Yuan Chen, Chih-Cheng Lai
The incidence of colon ischemia has increased in recent years, and is associated with high morbidity and mortality. The typical presentations of colon ischemia include abdominal pain, bloody diarrhea, and in severe case, ileus, fever and peritonitis. Here, we document a rare case of colon ischemia presenting with subcutaneous and intramuscular emphysema of the thigh. A 76-year-old woman presented to the emergency department for left thigh pain for three days. Physical examination revealed tenderness without obvious crepitus, erythema or swelling over the left groin area and a soft abdomen without tenderness...
March 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29247810/surgical-revascularization-of-the-celiac-artery-for-persistent-intestinal-ischemia-in-short-bowel-syndrome
#14
Arnaud Roussel, Alexandre Nuzzo, Quentin Pellenc, Yves Castier, Romain De Blic, Pierre Cerceau, Célia Boulitrop, Mathieu Coblence, Sonia Aguir, Pierre Mordant, Léon Maggiori, Audrey Huguet, Annie Sibert, Francisca Joly, Olivier Corcos
BACKGROUND AND OBJECTIVES: Without prompt superior mesenteric artery (SMA) revascularization, acute mesenteric ischemia (AMI) frequently leads to death or short bowel syndrome (SBS). In SBS patients, persistent or chronic intestinal ischemia (PII) of the remnant bowel can lead to recurrences of AMI. Since SMA revascularization is sometimes unfeasible, celiac artery (CA) revascularization may improve blood supply to the remnant bowel. The aim of this study was to describe and to assess our experience of the CA revascularization in case of SMA occlusion unsuitable for revascularization in the setting of PII in SBS patients...
January 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29246446/febrile-temperature-reprograms-by-redox-mediated-signaling-the-mitochondrial-metabolic-phenotype-in-monocyte-derived-dendritic-cells
#15
Marta Menga, Rosa Trotta, Rosella Scrima, Consiglia Pacelli, Veronica Silvestri, Claudia Piccoli, Nazzareno Capitanio, Arcangelo Liso
Fever-like hyperthermia is known to stimulate innate and adaptive immune responses. Hyperthermia-induced immune stimulation is also accompanied with, and likely conditioned by, changes in the cell metabolism and, in particular, mitochondrial metabolism is now recognized to play a pivotal role in this context, both as energy supplier and as signaling platform. In this study we asked if challenging human monocyte-derived dendritic cells with a relatively short-time thermal shock in the fever-range, typically observed in humans, caused alterations in the mitochondrial oxidative metabolism...
March 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29241382/causes-of-mortality-in-icu-acquired-weakness
#16
Linda van Wagenberg, Esther Witteveen, Luuk Wieske, Janneke Horn
BACKGROUND: Intensive care unit-acquired weakness (ICU-AW) is a common complication of critical illness and is associated with increased mortality, longer mechanical ventilation and longer hospital stay. Little is known about the causes of mortality in patients with ICU-AW. In this study, we aimed to give an overview of the causes of death in a population diagnosed with ICU-AW during hospital admission. METHODS: Data from a prospective cohort study in the mixed medical-surgical ICU of the Academic Medical Center in Amsterdam were used...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29135941/the-small-heat-shock-protein-%C3%AE-crystallin-b-shows-neuroprotective-properties-in-a-glaucoma-animal-model
#17
Fabian Anders, Aiwei Liu, Carolina Mann, Julia Teister, Jasmin Lauzi, Solon Thanos, Franz H Grus, Norbert Pfeiffer, Verena Prokosch
Glaucoma is a neurodegenerative disease that leads to irreversible retinal ganglion cell (RGC) loss and is one of the main causes of blindness worldwide. The pathogenesis of glaucoma remains unclear, and novel approaches for neuroprotective treatments are urgently needed. Previous studies have revealed significant down-regulation of α-crystallin B as an initial reaction to elevated intraocular pressure (IOP), followed by a clear but delayed up-regulation, suggesting that this small heat-shock protein plays a pathophysiological role in the disease...
November 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29133253/the-oxidative-stress-and-antioxidant-responses-of-litopenaeus-vannamei-to-low-temperature-and-air-exposure
#18
Zihan Xu, Joe M Regenstein, Dandan Xie, Wenjing Lu, Xingchen Ren, Jiajia Yuan, Linchun Mao
Low temperature and air exposure were the key attributes for waterless transportation of fish and shrimp. In order to investigate the oxidative stress and antioxidant responses of the live shrimp Litopenaeus vannamei in the mimic waterless transportation, live shrimp were cooled at 13 °C for 3 min, stored in oxygen at 15 °C for 12 h, and then revived in water at 25 °C. The survival rate of shrimp under this waterless transportation system was over 86.67%. The ultrastructure of hepatopancreas cells were observed while activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), glutathione peroxidase (GSH-Px), antisuperoxide anion free radicals (ASAFR), total antioxidant capacity (TAOC), reactive oxygen species (ROS) production, content of malondialdehyde (MDA) and relative mRNA expressions of CAT and GSH-Px in the hemolymph and hepatopancreas were determined...
January 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29094278/substrates-of-the-chloroplast-small-heat-shock-proteins-22e-f-point-to-thermolability-as-a-regulative-switch-for-heat-acclimation-in-chlamydomonas-reinhardtii
#19
Mark Rütgers, Ligia Segatto Muranaka, Timo Mühlhaus, Frederik Sommer, Sylvia Thoms, Juliane Schurig, Felix Willmund, Miriam Schulz-Raffelt, Michael Schroda
We have identified 39 proteins that interact directly or indirectly with high confidence with chloroplast HSP22E/F under heat stress thus revealing chloroplast processes affected by heat. Under conditions promoting protein unfolding, small heat shock proteins (sHsps) prevent the irreversible aggregation of unfolding proteins by integrating into forming aggregates. Aggregates containing sHsps facilitate the access of Hsp70 and ClpB/Hsp104 chaperones, which in ATP-dependent reactions disentangle individual proteins from the aggregates and assist in their refolding to the native state...
December 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29046296/geraniin-is-a-diuretic-by-inhibiting-the-na-k-2cl-cotransporter-nkcc2
#20
Erika Moreno, Juan A Gayosso, José R Montejano, Georgina Almaguer, Norma Vázquez, Cristino Cruz, Adriana Mercado, Norma A Bobadilla, Gerardo Gamba, Alfredo Sierra, Victoria Ramírez
Geranium seemannii Peyr is a perennial plant endemic to central Mexico that has been widely used for its diuretic effect, but the responsible compound of this effect is unknown as well as the mechanism by which the diuretic effect is achieved. Geraniin is one of the compounds isolated from this kind of geranium. This study was designed to determinate whether geraniin possesses diuretic activity and to elucidate the mechanism of action. Geraniin was extracted and purified from Geranium seemannii Peyr. Male Wistar rats were divided into four groups: 1) Control, 2) 75 mg/kg of geraniin, 3) 20 mg/kg of furosemide, and 4) 10 mg/kg of hydrochlorothiazide...
February 1, 2018: American Journal of Physiology. Renal Physiology
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