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Toxic stress syndrome

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https://www.readbyqxmd.com/read/29106690/metabolic-syndrome-and-associated-diseases-from-the-bench-to-the-clinic
#1
Donna L Mendrick, Anna Mae Diehl, Lisa S Topor, Rodney R Dietert, Yvonne Will, Michele A La Merrill, Sebastien Bouret, Vijayalaskshmi Varma, Kenneth L Hastings, Thaddeus T Schug, Susan G Emeigh Hart, Florence G Burleson
Metabolic Syndrome and Associated Diseases: From the Bench to the Clinic, a Society of Toxicology Contemporary Concepts in Toxicology (CCT) workshop was held on March 11, 2017. The meeting was convened to raise awareness of metabolic syndrome and its associated diseases and serve as a melting pot with scientists of multiple disciplines (e.g., toxicologists, clinicians, regulators) so as to spur research and understanding of this condition. The criteria for metabolic syndrome include obesity, dyslipidemia (low HDL and/or elevated triglycerides), elevated blood pressure, and alterations in glucose metabolism...
November 2, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29102461/effect-of-swarna-jibanti-coelogyne-cristata-lindley-in-alleviation-of-chronic-fatigue-syndrome-in-aged-wistar-rats
#2
Achintya Mitra, Tapas Kumar Sur, Sachhidananda Upadhyay, Dipankar Bhattacharyya, Jayram Hazra
BACKGROUND: Swarna Jibanti scientifically known as Coelogyne cristata Lindley (Orchidaceae), an orchid mentioned in Ayurvedic medicine is used to promote healthy life span. OBJECTIVE: The present work was planned to study the efficacy of hydro-alcoholic extract of pseudobulbs of C.cristata (CCE) to assess its role on chronic fatigue syndrome (CFS) induced behavioural and biochemical changes in aged Wistar rats compared to Panax ginseng (PG), a prototype anti-stress agent...
November 1, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/29097652/spermine-synthase-deficiency-causes-lysosomal-dysfunction-and-oxidative-stress-in-models-of-snyder-robinson-syndrome
#3
Chong Li, Jennifer M Brazill, Sha Liu, Christofer Bello, Yi Zhu, Marie Morimoto, Lauren Cascio, Rini Pauly, Zoraida Diaz-Perez, May Christine V Malicdan, Hongbo Wang, Luigi Boccuto, Charles E Schwartz, William A Gahl, Cornelius F Boerkoel, R Grace Zhai
Polyamines are tightly regulated polycations that are essential for life. Loss-of-function mutations in spermine synthase (SMS), a polyamine biosynthesis enzyme, cause Snyder-Robinson syndrome (SRS), an X-linked intellectual disability syndrome; however, little is known about the neuropathogenesis of the disease. Here we show that loss of dSms in Drosophila recapitulates the pathological polyamine imbalance of SRS and causes survival defects and synaptic degeneration. SMS deficiency leads to excessive spermidine catabolism, which generates toxic metabolites that cause lysosomal defects and oxidative stress...
November 2, 2017: Nature Communications
https://www.readbyqxmd.com/read/29025771/endothelial-activation-and-blood-brain-barrier-disruption-in-neurotoxicity-after-adoptive-immunotherapy-with-cd19-car-t-cells
#4
Juliane Gust, Kevin A Hay, Laïla-Aïcha Hanafi, Daniel Li, David Myerson, Luis F Gonzalez-Cuyar, Cecilia Yeung, W Conrad Liles, Mark Wurfel, Jose A Lopez, Junmei Chen, Dominic Chung, Susanna Harju-Baker, Tahsin Özpolat, Kathleen R Fink, Stanley R Riddell, David G Maloney, Cameron J Turtle
Lymphodepletion chemotherapy followed by infusion of CD19-targeted chimeric antigen receptor-modified T (CAR-T) cells can be complicated by neurologic adverse events (AE) in patients with refractory B-cell malignancies. In 133 adults treated with CD19 CAR-T cells, we found that acute lymphoblastic leukemia, high CD19(+) cells in bone marrow, high CAR-T cell dose, cytokine release syndrome, and preexisting neurologic comorbidities were associated with increased risk of neurologic AEs. Patients with severe neurotoxicity demonstrated evidence of endothelial activation, including disseminated intravascular coagulation, capillary leak, and increased blood-brain barrier (BBB) permeability...
October 12, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28971322/the-diabetic-foot-as-a-proxy-for-cardiovascular-events-and-mortality-review
#5
REVIEW
Isa Dietrich, Gustavo Arruda Braga, Fernanda Gomes de Melo, Ana Carolina Calmon da Costa Silva Silva
PURPOSE OF REVIEW: This article reviewed very recent papers (2016) discussing or bringing clinical evidences of the possible common pathways leading to diabetic foot syndrome (DFS) and increased mortality rates. RECENT FINDINGS: Diabetic patients with diabetic foot syndrome have a mortality rate greater than twofold when compared with non-ulcerated diabetics. In addition, the 5-year mortality rate following amputation is estimated at 39-68%, a life expectancy comparable to aggressive types of cancer or advanced congestive heart failure...
October 2, 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/28925976/shiga-toxin-therapeutics-beyond-neutralization
#6
REVIEW
Gregory Hall, Shinichiro Kurosawa, Deborah J Stearns-Kurosawa
Ribotoxic Shiga toxins are the primary cause of hemolytic uremic syndrome (HUS) in patients infected with Shiga toxin-producing enterohemorrhagic Escherichia coli (STEC), a pathogen class responsible for epidemic outbreaks of gastrointestinal disease around the globe. HUS is a leading cause of pediatric renal failure in otherwise healthy children, resulting in a mortality rate of 10% and a chronic morbidity rate near 25%. There are currently no available therapeutics to prevent or treat HUS in STEC patients despite decades of work elucidating the mechanisms of Shiga toxicity in sensitive cells...
September 19, 2017: Toxins
https://www.readbyqxmd.com/read/28917022/epidemiology-pathogenesis-and-management-of-takotsubo-syndrome
#7
REVIEW
Shams Y-Hassan, Per Tornvall
Takotsubo syndrome is a recently recognized acute cardiac disease entity with a clinical presentation resembling that of an acute coronary syndrome. The typical takotsubo syndrome patient has a unique circumferential left (bi-) ventricular contraction abnormality profile that extends beyond a coronary artery supply territory and appears to follow the anatomical cardiac sympathetic innervation. The syndrome predominantly affects postmenopausal women and is often preceded by emotional or physical stress. Patients with predisposing factors such as malignancy and other chronic comorbidities are more prone to suffer from takotsubo syndrome...
September 15, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28880010/chronic-pancreatitis
#8
REVIEW
Jorg Kleeff, David C Whitcomb, Tooru Shimosegawa, Irene Esposito, Markus M Lerch, Thomas Gress, Julia Mayerle, Asbjørn Mohr Drewes, Vinciane Rebours, Fatih Akisik, J Enrique Domínguez Muñoz, John P Neoptolemos
Chronic pancreatitis is defined as a pathological fibro-inflammatory syndrome of the pancreas in individuals with genetic, environmental and/or other risk factors who develop persistent pathological responses to parenchymal injury or stress. Potential causes can include toxic factors (such as alcohol or smoking), metabolic abnormalities, idiopathic mechanisms, genetics, autoimmune responses and obstructive mechanisms. The pathophysiology of chronic pancreatitis is fairly complex and includes acinar cell injury, acinar stress responses, duct dysfunction, persistent or altered inflammation, and/or neuro-immune crosstalk, but these mechanisms are not completely understood...
September 7, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28868828/in-vitro-effect-of-fatty-acids-identified-in-the-plasma-of-obese-adolescents-on-the-function-of-pancreatic-%C3%AE-cells
#9
Claudia Velasquez, Juan Sebastian Vasquez, Norman Balcazar
BACKGROUND: The increase in circulating free fatty acid (FFA) levels is a major factor that induces malfunction in pancreatic β-cells. We evaluated the effect of FFAs reconstituted according to the profile of circulating fatty acids found in obese adolescents on the viability and function of the murine insulinoma cell line (mouse insulinoma [MIN6]). METHODS: From fatty acids obtained commercially, plasma-FFA profiles of three different youth populations were reconstituted: obese with metabolic syndrome; obese without metabolic syndrome; and normal weight without metabolic syndrome...
August 2017: Diabetes & Metabolism Journal
https://www.readbyqxmd.com/read/28818208/catecholamine-dependent-%C3%AE-adrenergic-signaling-in-a-pluripotent-stem-cell-model%C3%A2-of-takotsubo-cardiomyopathy
#10
Thomas Borchert, Daniela Hübscher, Celina I Guessoum, Tuan-Dinh D Lam, Jelena R Ghadri, Isabel N Schellinger, Malte Tiburcy, Norman Y Liaw, Yun Li, Jan Haas, Samuel Sossalla, Mia A Huber, Lukas Cyganek, Claudius Jacobshagen, Ralf Dressel, Uwe Raaz, Viacheslav O Nikolaev, Kaomei Guan, Holger Thiele, Benjamin Meder, Bernd Wollnik, Wolfram-Hubertus Zimmermann, Thomas F Lüscher, Gerd Hasenfuss, Christian Templin, Katrin Streckfuss-Bömeke
BACKGROUND: Takotsubo syndrome (TTS) is characterized by an acute left ventricular dysfunction and is associated with life-threating complications in the acute phase. The underlying disease mechanism in TTS is still unknown. A genetic basis has been suggested to be involved in the pathogenesis. OBJECTIVES: The aims of the study were to establish an in vitro induced pluripotent stem cell (iPSC) model of TTS, to test the hypothesis of altered β-adrenergic signaling in TTS iPSC-cardiomyocytes (CMs), and to explore whether genetic susceptibility underlies the pathophysiology of TTS...
August 22, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28751568/mtor-mechanistic-target-of-rapamycin-inhibition-decreases-mechanosignaling-collagen-accumulation-and-stiffening-of-the-thoracic-aorta-in-elastin-deficient-mice
#11
Yang Jiao, Guangxin Li, Qingle Li, Rahmat Ali, Lingfeng Qin, Wei Li, Yibing Qyang, Daniel M Greif, Arnar Geirsson, Jay D Humphrey, George Tellides
OBJECTIVE: Elastin deficiency because of heterozygous loss of an ELN allele in Williams syndrome causes obstructive aortopathy characterized by medial thickening and fibrosis and consequent aortic stiffening. Previous work in Eln-null mice with a severe arterial phenotype showed that inhibition of mTOR (mechanistic target of rapamycin), a key regulator of cell growth, lessened the aortic obstruction but did not prevent early postnatal death. We investigated the effects of mTOR inhibition in Eln-null mice partially rescued by human ELN that manifest a less severe arterial phenotype and survive long term...
September 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28714395/five-decades-of-cuprizone-an-updated-model-to-replicate-demyelinating-diseases
#12
Jose M Vega-Riquer, Gerardo Mendez-Victoriano, Raul A Morales-Luckie, Oscar Gonzalez-Perez
Multiple sclerosis, Guillain-Barré syndrome, peripheral nerve polyneuropathy and others comprise a group of demyelinating diseases characterized by progressive (and eventually irreversible) loss of oligodendrocytes and myelin sheaths in the white matter of the brain. To date, the etiology of these disorders is not well known and no effective treatments are currently available. Therefore, further research is needed to gain a better understand and treat these patients. To accomplish this goal, it is necessary to have appropriate animal models that closely resemble the pathophysiology of these diseases...
July 17, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28652650/role-of-non-steroidal-anti-inflammatory-drugs-on-intestinal-permeability-and-nonalcoholic-fatty-liver-disease
#13
REVIEW
Erika Utzeri, Paolo Usai
The use of non-steroidal anti-inflammatory drugs (NSAIDs) is widespread worldwide thanks to their analgesic, anti-inflammatory and antipyretic effects. However, even more attention is placed upon the recurrence of digestive system complications in the course of their use. Recent data suggests that the complications of the lower gastro-intestinal tract may be as frequent and severe as those of the upper tract. NSAIDs enteropathy is due to enterohepatic recycling of the drugs resulting in a prolonged and repeated exposure of the intestinal mucosa to the compound and its metabolites...
June 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28645448/takotsubo-syndrome-presenting-as-syncope-in-a-patient-with-permanent-pacemaker
#14
Bharatraj Banavalikar, Sivasankaran Sivasubramonian, Narayanan Namboodiri, Krishna Kumar Mohanan Nair, Dibya Ranjan Behera, Ajitkumar Valaparambil
Takotsubo syndrome is an acute reversible heart failure syndrome triggered by physical or emotional stress, especially in postmenopausal women. Herein, we describe a case of a 31-year-old pacemaker dependent lady who presented with syncope after she was bereaved of her father. Electrocardiogram at admission revealed ventricular paced rhythm at 60/min, prolonged QT interval and frequent runs of torsades de pointes. Transthoracic echocardiogram and left ventriculogram revealed findings typical of Takotsubo syndrome...
May 18, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28606950/pathophysiology-of-takotsubo-syndrome
#15
REVIEW
Francesco Pelliccia, Juan Carlos Kaski, Filippo Crea, Paolo G Camici
Originally described by Japanese authors in the 1990s, Takotsubo syndrome (TTS) generally presents as an acute myocardial infarction characterized by severe left ventricular dysfunction. TTS, however, differs from an acute coronary syndrome because patients have generally a normal coronary angiogram and left ventricular dysfunction, which extends beyond the territory subtended by a single coronary artery and recovers within days or weeks. The prognosis was initially thought to be benign, but subsequent studies have demonstrated that both short-term mortality and long-term mortality are higher than previously recognized...
June 13, 2017: Circulation
https://www.readbyqxmd.com/read/28595546/therapeutic-proteins-for-treatment-of-corneal-epithelial-defects
#16
Evgeni Yu Zernii, Viktoriia E Baksheeva, Elena V Yani, Pavel P Philippov, Ivan I Senin
Corneal epithelial disorders take pride of place in modern ophthalmology. Defects of corneal epithelium are commonly accompanied by blurry vision, photophobia and tearing. Since cornea is the most densely innervated tissue of organisms, its disruption leads to development of a severe pain syndrome. Mild corneal erosions commonly undergo quick spontaneous recovery. Suppression of corneal wound healing due to various pathological causes results in development of severe recurrent erosions and persistent corneal defects...
June 8, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28588507/neurovascular-unit-dysfunction-and-blood-brain-barrier-hyperpermeability-contribute-to-schizophrenia-neurobiology-a-theoretical-integration-of-clinical-and-experimental-evidence
#17
REVIEW
Souhel Najjar, Silky Pahlajani, Virginia De Sanctis, Joel N H Stern, Amanda Najjar, Derek Chong
Schizophrenia is a psychotic disorder characterized by delusions, hallucinations, negative symptoms, as well as behavioral and cognitive dysfunction. It is a pathoetiologically heterogeneous disorder involving complex interrelated mechanisms that include oxidative stress and neuroinflammation. Neurovascular endothelial dysfunction and blood-brain barrier (BBB) hyperpermeability are established mechanisms in neurological disorders with comorbid psychiatric symptoms such as epilepsy, traumatic brain injury, and Alzheimer's disease...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28550350/recent-advances-in-the-study-of-immunodeficiency-and-dna-damage-response
#18
REVIEW
Tomohiro Morio
DNA breaks can be induced by exogenous stimuli or by endogenous stress, but are also generated during recombination of V, D, and J genes (V(D)J recombination), immunoglobulin class switch recombination (CSR). Among various DNA breaks generated, DNA double strand break (DSB) is the most deleterious one. DNA damage response (DDR) is initiated when DSBs are detected, leading to DNA break repair by non-homologous end joining (NHEJ). The process is critically important for the generation of diversity for foreign antigens; and failure to exert DNA repair leads to immunodeficiency such as severe combined immunodeficiency and hyper-IgM syndrome...
May 26, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28510119/genetic-epidemiology-of-titin-truncating-variants-in-the-etiology-of-dilated-cardiomyopathy
#19
REVIEW
Ali M Tabish, Valerio Azzimato, Aris Alexiadis, Byambajav Buyandelger, Ralph Knöll
Heart failure (HF) is a complex clinical syndrome defined by the inability of the heart to pump enough blood to meet the body's metabolic demands. Major causes of HF are cardiomyopathies (diseases of the myocardium associated with mechanical and/or electrical dysfunction), among which the most common form is dilated cardiomyopathy (DCM). DCM is defined by ventricular chamber enlargement and systolic dysfunction with normal left ventricular wall thickness, which leads to progressive HF. Over 60 genes are linked to the etiology of DCM...
June 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28486212/anti-oxidative-and-anti-inflammatory-benefits-of-the-ribonucleoside-analogue-5-azacitidine-in-mice-with-acetaminophen-induced-toxic-hepatitis
#20
Changming Yang, Jun Yi, Xianqiong Gong, Pu Ge, Jie Dai, Ling Lin, Yu Xing, Li Zhang
Toxic hepatitis induced by overdose of acetaminophen (APAP) is one of the major life-threatening problems, oxidative stress and inflammatory injury are the essential underlying mechanisms. 5-Azacytidine (5-AZA) is a ribonucleoside analogue which has been approved for the treatment of patients with acute myeloid leukemia and myelodyplastic syndrome, but recent studies also found that 5-AZA might have anti-oxidative and anti-inflammatory benefits in non-tumor disorders. In the present study, the potential effects of 5-AZA on APAP-induced toxic hepatitis were investigated in a mouse model in vivo...
July 2017: International Immunopharmacology
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