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Propranolol

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https://www.readbyqxmd.com/read/29909001/-postural-tachycardia-syndrome-pots-an-up-to-date
#1
L Astudillo, A Laure, V Fabry, G Pugnet, P Maury, M Labrunée, L Sailler, A Pavy-Le Traon
Postural tachycardia syndrome (PoTS) is a multifactorial syndrome defined by an increase in heart rate ≥30bpm, within 10minutes of standing (or during a head up tilt test to at least 60°), in absence of orthostatic hypotension. It is associated with symptoms of cerebral hypoperfusion that are worse when upright and improve in supine position. Patients have an intense fatigue with a high incidence on quality of life. This syndrome can be explained by many pathophysiological mechanisms. It can be associated with Ehlers-Danlos disease and some autoimmune disorders...
June 13, 2018: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/29908866/oral-propranolol-in-a-child-with-infantile-hemangioma-of-the-urethra
#2
Toshihiko Itesako, Rumiko Eura, Yasuhiro Okamoto, Shuichi Tatarano, Hirofumi Yoshino, Hiroaki Nishimura, Yasutoshi Yamada, Hideki Enokida, Masayuki Nakagawa
Infantile hemangiomas (IH) are the most common in the head and neck region.1 They can occur anywhere in the skin, however, urethral hemangiomas are very rare. We describe a case report of a three years old boy with extensive lesions of IH in the anterior urethra. Urethral IH were disappeared during one year of oral administration of propranolol though it brought on urinary retention. This is the first report about oral propranolol treatment in a child with urethral IH. Oral administration of propranolol may be effective for urethral IH and beneficial especially for lesions requiring extensive surgical resection and reconstruction...
June 14, 2018: Urology
https://www.readbyqxmd.com/read/29906695/influence-of-ph-on-the-uptake-and-toxicity-of-%C3%AE-blockers-in-embryos-of-zebrafish-danio-rerio
#3
Lisa Bittner, Elisabet Teixido, Bettina Seiwert, Beate I Escher, Nils Klüver
ß-Blockers are weak bases with acidity constants related to their secondary amine group. At environmental pH they are protonated with the tendency to shift to their neutral species at more alkaline pH. Here we studied the influence of pH from 5.5 to 8.6 on the toxicity of the four ß-blockers atenolol, metoprolol, labetalol and propranolol in zebrafish embryos, relating toxicity not only in a conventional way to external aqueous concentrations but also to measured internal concentrations. Besides lethality, we evaluated changes in swimming activity and heartbeat, using the Locomotor Response (LMR) method and the Vertebrate Automated Screening Technology (VAST) for high throughput imaging...
May 28, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29905510/bleeding-risk-of-cerebral-cavernous-malformations-in-patients-on-%C3%AE-blocker-medication-a-cohort-study
#4
Johannes Goldberg, Christian Jaeggi, Daniel Schoeni, Pasquale Mordasini, Andreas Raabe, David Bervini
OBJECTIVE Cerebral cavernous malformations (CCMs) are frequently diagnosed vascular malformations of the brain. Although most CCMs are asymptomatic, some can be responsible for intracerebral hemorrhage or seizures. In selected cases, microsurgical resection is the preferred treatment option. Treatment with the unselective β-blocker propranolol has been presumed to stabilize and eventually lead to CCM size regression in a limited number of published case series; however, the underlying mechanism and evidence for this effect remain unclear...
June 15, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29902511/human-intestinal-fluid-factors-affecting-intestinal-drug-permeation-in-vitro
#5
Riethorst Danny, Brouwers Joachim, Motmans Jens, Augustijns Patrick
Intestinal permeability assessment is an important aspect of drug development, which strongly depends on the solvent system used in the intestinal donor compartment. For this purpose, human intestinal fluids (HIF) can be considered as the golden standard. A recent study demonstrated a reduced apparent permeation across rat intestinal tissue from fed versus fasted state HIF for 9 out of 16 compounds tested. Commercially available fed and fasted state simulated fluids (FeSSIF and FaSSIF) reproduced this food effect for only 3 out of 16 compounds...
June 11, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29900525/norepinephrine-upregulates-volume-regulated-chloride-current-by-pka-independent-camp-epac-pathway-in-human-atrial-myocytes
#6
Guo-Sheng Xiao, Yan-Hui Zhang, Yan Wang, Hai-Ying Sun, Clive M Baumgarten, Gui-Rong Li
BACKGROUND AND PURPOSE: Adrenergic regulation of cell volume-regulated chloride current (ICl.vol ) is species-dependent. The present study investigates the mechanism underlying adrenergic regulation of ICl.vol in human atrial myocytes. EXPERIMENTAL APPROACH: A conventional whole-cell patch voltage-clamp technique was utilized to record membrane current in human atrial myocytes. ICl.vol was evoked by hyposmotic bath solution (0.6-times isosmotic, 0.6T). KEY RESULTS: ICl...
June 13, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29886365/fate-and-distribution-of-pharmaceutically-active-compounds-in-mesocosm-constructed-wetlands
#7
Yujie He, Nora B Sutton, Yu Lei, Huub H M Rijnaarts, Alette A M Langenhoff
Removal of pharmaceutically active compounds (PhACs) in constructed wetlands (CWs) is a complex interplay of different processes. We studied fate and distribution of seven PhACs (caffeine, CAF; naproxen, NAP; metoprolol, MET; propranolol, PRO; ibuprofen, IBP; carbamazepine, CBZ; diclofenac, DFC) in mesocosm CWs and effects of irradiation via pre-photocatalysis, substrate composition (mainly sediment) through addition of litter (dead plant biomass), and plants. CWs showed high removal of CAF, NAP, MET, PRO, and IBP (79-99%)...
May 22, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29884665/dangerous-mistake-an-accidental-caffeine-overdose
#8
Ana Andrade, Catarina Sousa, Mónica Pedro, Martinho Fernandes
Caffeine (1,3,7-trimethylxanthine) is a natural product commonly presented in food's composition, beverages and medicinal products. Generally, it is thought to be safe under normal dosage, yet it can be fatal in case of severe intoxication. We report a case of a healthy 32-year-old woman who went to the local emergency department (ED) 30 min after ingesting, accidentally, 5000 mg of anhydrous caffeine for a preworkout supplement. At the ED, she presented an episode of presyncope followed by agitation. ECG showed polymorphic broad complex QRS tachycardia and arterial blood gas revealed metabolic acidaemia with severe hypokalemia...
June 8, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29881844/a-pumpless-body-on-a-chip-model-using-a-primary-culture-of-human-intestinal-cells-and-a-3d-culture-of-liver-cells
#9
Huanhuan Joyce Chen, Paula Miller, Michael L Shuler
We describe an expanded modular gastrointestinal (GI) tract-liver system by co-culture of primary human intestinal epithelial cells (hIECs) and 3D liver mimic. The two organ body-on-chip design consisted of GI and liver tissue compartments that were connected by fluidic medium flow driven via gravity. The hIECs and HepG2 C3A liver cells in the co-culture system maintained high viability for at least 14 days in which hIECs differentiated into major cell types found in native human intestinal epithelium and the HepG2 C3A cells cultured on 3D polymer scaffold formed a liver micro-lobe like structure...
June 8, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29879029/no-obvious-sympathetic-excitation-after-massive-levothyroxine-overdose-a-case-report
#10
Jianxin Xue, Lei Zhang, Zhiqiang Qin, Ran Li, Yi Wang, Kai Zhu, Xiao Li, Xian Gao, Jianzhong Zhang
RATIONALE: Thyrotoxicosis from an overdose of medicinal thyroid hormone is a condition that may be associated with a significant delay in onset of toxicity. However, limited literature is available regarding thyrotoxicosis attributed to excessive ingestion of exogenous thyroid hormone and most cases described were pediatric clinical researches. Herein, we presented the course of a patient who ingested a massive amount of levothyroxine with no obvious sympathetic excited symptoms exhibited and reviewed feasible treatment options for such overdoses...
June 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29874754/sorption-and-biodegradation-of-six-pharmaceutically-active-compounds-under-four-different-redox-conditions
#11
Arnoud de Wilt, Yujie He, Nora Sutton, Alette Langenhoff, Huub Rijnaarts
This study explored the removal of six pharmaceutically active compounds (PhACs) in lab-scale experiments with sediments under four redox conditions, namely aerobic, nitrate reducing, sulfate reducing, and methanogenic conditions using batch and column set-ups. Redox conditions were found to influence PhAC removal by sorption and biodegradation. The most optimal PhAC removal was observed at the outer ranges of the redox spectrum, i.e. either aerobic or deep anaerobic (sulfate reducing and methanogenic conditions), whereas nitrate reducing conditions were found least effective for PhACs biodegradation and sorption...
February 2018: Chemosphere
https://www.readbyqxmd.com/read/29872523/impact-of-sirolimus-treatment-for-refractory-kaposiform-hemangioendothelioma-with-exacerbation-of-the-disease-10-years-after-initial-diagnosis
#12
Naoki Sakata, So-Ichi Suenobu, Munehiro Okano, Satoshi Ueda, Masatomo Kimura, Tsukasa Takemura
We describe our experience with a 12 year-old girl with kaposiform hemangioendothelioma accompanied by Kasabach-Merritt phenomenon with exacerbation of the disease 10 years after the initial diagnosis. Kaposiform hemangioendothelioma infiltrated into the subcutaneous tissue of the facial skin with deterioration of coagulopathy despite conventional therapies including corticosteroid, vincristine, and propranolol. Sirolimus, a mammalian target of rapamycin inhibitor, produced rapid and dramatic improvement of the Kasabach-Merritt phenomenon and kaposiform hemangioendothelioma shrinkage...
2018: Rare Tumors
https://www.readbyqxmd.com/read/29871961/rapidly-involuting-congenital-haemangioma-of-the-liver
#13
Deirdre Lewis, Kevin Hachey, Shannon Fitzgerald, Ruben Vaidya
Rapidly involuting congenital haemangiomas (RICHs) are rare benign vascular tumours of infancy. They are generally asymptomatic, but can present with thrombocytopaenia and coagulopathy. Significant complications including life-threatening bleeding, high-output heart failure and liver failure, though rare, can occur. RICHs generally regress by 12-14 months of age and can be managed clinically with symptomatic treatment, watchful waiting and close monitoring of the size of the haemangioma. Medical management (corticosteroids, propranolol) has not shown to be effective, in contrast to infantile haemangioma which will not regress spontaneously and has been noted to respond to medical therapy...
June 5, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29871829/changing-management-guidelines-in-thyrotoxic-hypokalemic-periodic-paralysis
#14
Matthew Correia, Mark Darocki, Eva Tovar Hirashima
BACKGROUND: Periodic paralysis is a rare complication of hyperthyroidism. Patients of East Asian descent are most commonly affected. Presentation is characterized by recurrent episodes of painless, abrupt-onset weakness, with laboratory evaluation characterized by profound hypokalemia. Underlying hyperthyroidism may not be clinically evident, but differentiation from the familial variant is critical due to differing treatment pathways. CASE REPORT: We describe the presentation of a 22-year-old man with recurrent relapsing-remitting weakness with undiagnosed hyperthyroidism...
June 2, 2018: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29870943/removal-of-selected-pharmaceuticals-and-personal-care-products-in-reclaimed-water-during-simulated-managed-aquifer-recharge
#15
Soohyung Park, Wontae Lee
This study investigated the removal of selected pharmaceuticals and personal care products (PPCPs) in a simulated managed aquifer recharge (MAR) system. The PPCPs included antibiotic, antiepileptic, antihypertensive, anti-inflammatory, and antilipidemic drugs, contrast media, herbicides, and stimulants. We first monitored the occurrence and fate of 22 PPCPs at a water reclamation facility (WRF) in Korea, and found carbamazepine and primidone were not readily removed (below 25% removal in average) by the WRF...
June 2, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29864703/biological-regeneration-of-manganese-iv-and-iron-iii-for-anaerobic-metal-oxide-mediated-removal-of-pharmaceuticals-from-water
#16
Wenbo Liu, Alette A M Langenhoff, Nora B Sutton, Huub H M Rijnaarts
Applying manganese(IV)- or iron(III)-(hydr)oxides to remove pharmaceuticals from water could be attractive, due to the capacity of these metal oxides to remove pharmaceuticals and be regenerated. As pharmaceutical removal under anaerobic conditions is foreseen, Mn(IV) or Fe(III) regeneration under anaerobic conditions, or with minimum oxygen dosage, is preferred. In this study, batch experiments are performed to investigate (1) Mn(IV) and Fe(III) regeneration from Mn(II) and Fe(II); (2) the pharmaceutical removal during biological Mn(IV) and Fe(III) regeneration; and (3) anaerobic abiotic pharmaceutical removal with different Mn(IV) or Fe(III) species...
May 18, 2018: Chemosphere
https://www.readbyqxmd.com/read/29859954/melanin-targeting-for-intracellular-drug-delivery-quantification-of-bound-and-free-drug-in-retinal-pigment-epithelial-cells
#17
REVIEW
Anna-Kaisa Rimpelä, Marja Hagström, Heidi Kidron, Arto Urtti
Melanin binding affects drug distribution and retention in pigmented ocular tissues, thereby affecting drug response, duration of activity and toxicity. Therefore, it is a promising possibility for drug targeting and controlled release in the pigmented cells and tissues. Intracellular unbound drug concentrations determine pharmacological and toxicological actions, but analyses of unbound vs. total drug concentrations in pigmented cells are lacking. We studied intracellular binding and cellular drug uptake in pigmented retinal pigment epithelial cells and in non-pigmented ARPE-19 cells with five model drugs (chloroquine, propranolol, timolol, diclofenac, methotrexate)...
May 31, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29858911/the-effects-of-propranolol-on-heart-rate-variability-and-quantitative-mechanistic-pain-profiling-a-randomized-placebo-controlled-crossover-study
#18
Kristian Kjær Petersen, Hjalte Holm Andersen, Masato Tsukamoto, Lincoln Tracy, Julian Koenig, Lars Arendt-Nielsen
BACKGROUND AND AIMS: The autonomic nervous system (ANS) is capable of modulating pain. Aberrations in heart rate variability (HRV), reflective of ANS activity, are associated with experimental pain sensitivity, chronic pain, and more recently, pain modulatory mechanisms but the underlying mechanisms are still unclear. HRV is lowered during experimental pain as well as in chronic pain conditions and HRV can be increased by propranolol, which is a non-selective β-blocker. Sensitization of central pain pathways have been observed in several chronic pain conditions and human mechanistic pain biomarkers for these central pain pathways include temporal summation of pain (TSP) and conditioned pain modulation (CPM)...
June 2, 2018: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29846253/infantile-hemangiomas-what-have-we-learned-from-propranolol
#19
Rachael Hagen, Erica Ghareeb, Omid Jalali, Zachary Zinn
PURPOSE OF REVIEW: Infantile hemangiomas are the most common vascular tumor of infancy. Treatment of infantile hemangiomas was revolutionized when propranolol, a nonselective β-blocker, was reported to be effective therapy. In this review, we highlight the lessons learned using propranolol to treat infantile hemangiomas. We also describe the ongoing effort to understand the mechanism of action of propranolol. RECENT FINDINGS: Although the pathogenesis of infantile hemangiomas is not fully understood, maternal hypoxic stress and embolization of placental tissue are suggested to be critical components in their development...
May 24, 2018: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/29844139/safety-of-oral-propranolol-for-infantile-hemangioma
#20
Catherine Droitcourt, Sandrine Kerbrat, Caroline Rault, Marie-Anne Botrel, André Happe, Ronan Garlantezec, Bernard Guillot, Jean-Marc Schleich, Emmanuel Oger, Alain Dupuy
OBJECTIVES: The safety of oral propranolol for infantile hemangioma has not yet been studied at population level since the pediatric use marketing authorization was obtained in Europe. METHODS: A survey of a nationwide, claim-based observational cohort of children <3 years old, with at least 1 delivery of oral propranolol between July 2014 and June 2016, was performed by using the database of the French National Health Insurance system. Standardized morbidity ratios (SMRs) were calculated by using, from the same database, a representative random sample of nonexposed subjects...
May 29, 2018: Pediatrics
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