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Hydroxocobalamin

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https://www.readbyqxmd.com/read/29623888/comparative-study-of-the-tissue-distribution-of-equimolar-repeated-doses-of-hydroxocobalamin-and-cobalt-chloride-in-the-rats
#1
Paul Houeto, Pascal Houzé, Frédéric J Baud
High dose of the cobalt atom is toxic for mammals. Hydroxocobalamin is considered safe due to the inclusion of the cobalt atom into the heminic moiety. The tissue distribution of cobalt following repeated doses of either hydroxocobalamin or cobalt chloride was studied in Wistar rats. In both cases, cobalt was administered in equimolar doses daily for an overall period of three weeks. Three groups were designed. In the hydroxocobalamin treated group, ten rats received hydroxocobalamin 17.5 mg by intraperitoneal route daily...
April 1, 2018: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/29618429/assessing-the-efficacy-of-aqueous-garlic-extract-sodium-nitrite-and-sodium-thiosulfate-against-prolonged-oral-cyanide-exposure-in-rabbits
#2
Muhammad Avais, Muhammad Sarwar Khan, Muhammad Arif Khan, Kamran Ashraf, Zahoorul Hassan, Jawaria Ali Khan, Nisar Ahmad
This study was aimed to compare the efficacy of aqueous garlic extract, sodium nitrite (SNT), sodium thiosulfate (STS) and hydroxocobalamin against oral cyanide exposure in rabbits. For this purpose, forty two adult male rabbits were divided randomly into 7 groups of 6 animals (A-G) each. Rabbits in group A were offered feed only and served as negative control, while the rabbits in group B received feed plus potassium cyanide (KCN) at 3mg/kg orally and were kept as positive control. Animals in group C received feed, KCN and intraperitoneal injection (IP) of aqueous garlic extract at 500mg/kg...
March 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29573551/case-report-of-high-dose-hydroxocobalamin-in-the-treatment-of-vasoplegic-syndrome-during-liver-transplantation
#3
S Sandy An, C Patrick Henson, Robert E Freundlich, Matthew D McEvoy
A 66-year-old male with cryptogenic cirrhosis secondary to non-alcoholic steatohepatitis (NASH) presented for orthotopic liver transplantation. Following organ reperfusion, the patient developed vasoplegic syndrome, with arterial blood pressures of approximately 60-70/30-40 mmHg (mean arterial pressure, MAP<45 mmHg) for over 90 minutes. He required high-dose norepinephrine and vasopressin infusions, as well as intravenous bolus doses of norepinephrine and vasopressin to reach a goal MAP> 60 mmHg. There was minimal response to a 2 mg/kg intravenous (IV) bolus of methylene blue...
March 24, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29572946/prospective-long-term-evaluation-of-parenteral-hydroxocobalamin-supplementation-in-juvenile-beagles-with-selective-intestinal-cobalamin-malabsorption-imerslund-gr%C3%A3-sbeck-syndrome
#4
Peter Hendrik Kook, C E Reusch, M Hersberger
BACKGROUND: Prospective studies on maintenance treatment for Beagles with hereditary selective cobalamin (Cbl) malabsorption (Imerslund-Gräsbeck syndrome, IGS) are lacking. In our experience, measurement of methylmalonic acid (MMA), a Cbl-dependent metabolite, seems more helpful to monitor Cbl status as compared with serum Cbl concentrations. OBJECTIVES: To evaluate a standardized Cbl supplementation scheme in Beagles with IGS. We hypothesized that a single parenteral dose of 1 mg hydroxocobalamin (OH-Cbl) would maintain clinical and metabolic remission for up to 2 months...
March 23, 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29561390/risk-factors-for-acute-mesenteric-ischemia-in-critically-ill-burns-patients-a-matched-case-control-study
#5
Sabri Soussi, Marina Taccori, Christian De Tymowski, François Depret, Maïté Chaussard, Alexandre Fratani, Marion Jully, Alexandru Cupaciu, Axelle Ferry, Mourad Benyamina, Kevin Serror, David Boccara, Marc Chaouat, Maurice Mimoun, Pierre Cattan, Anne-Marie Zagdanski, James Anstey, Alexandre Mebazaa, Matthieu Legrand
OBJECTIVES: Burn-induced shock can lead to tissue hypoperfusion, including the gut. We performed this study to describe burn patients at risk of acute mesenteric ischemia (AMI) with the aim to identify potential modifiable risk factors. METHODS: Retrospective case-control study including adult severely burned patients between August 2012 and March 2017. Patients who developed AMI were matched to severely burned patients without AMI at a ratio of 1:3 (same year of admission, Abbreviated Burn Severity Index (ABSI) and Simplified Acute Physiology Score II (SAPSII))...
March 20, 2018: Shock
https://www.readbyqxmd.com/read/29489307/emergency-department-management-of-smoke-inhalation-injury-in-adults-digest
#6
Karalynn Otterness, Christine Ahn, Jeffrey Nusbaum, Nachi Gupta
Smoke inhalation injury portends increased morbidity and mortality in fire-exposed patients. Upper airway thermal burns, inflammation from lower airway irritants, and systemic effects of carbon monoxide and cyanide can contribute to injury. A standardized diagnostic protocol for inhalation injury is lacking, and management remains mostly supportive. Clinicians should maintain a high index of suspicion for concomitant traumatic injuries. Diagnosis is mostly clinical, aided by bronchoscopy and other supplementary tests...
March 1, 2018: Emergency Medicine Practice
https://www.readbyqxmd.com/read/29489306/emergency-department-management-of-smoke-inhalation-injury-in-adults
#7
Karalynn Otterness, Christine Ahn
Smoke inhalation injury portends increased morbidity and mortality in fire-exposed patients. Upper airway thermal burns, inflammation from lower airway irritants, and systemic effects of carbon monoxide and cyanide can contribute to injury. A standardized diagnostic protocol for inhalation injury is lacking, and management remains mostly supportive. Clinicians should maintain a high index of suspicion for concomitant traumatic injuries. Diagnosis is mostly clinical, aided by bronchoscopy and other supplementary tests...
March 2018: Emergency Medicine Practice
https://www.readbyqxmd.com/read/29461292/inhalation-injury-in-the-burned-patient
#8
Guillermo Foncerrada, Derek M Culnan, Karel D Capek, Sagrario González-Trejo, Janos Cambiaso-Daniel, Lee C Woodson, David N Herndon, Celeste C Finnerty, Jong O Lee
Inhalation injury causes a heterogeneous cascade of insults that increase morbidity and mortality among the burn population. Despite major advancements in burn care for the past several decades, there remains a significant burden of disease attributable to inhalation injury. For this reason, effort has been devoted to finding new therapeutic approaches to improve outcomes for patients who sustain inhalation injuries.The three major injury classes are the following: supraglottic, subglottic, and systemic. Treatment options for these three subtypes differ based on the pathophysiologic changes that each one elicits...
February 15, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29461288/carbon-monoxide-and-cyanide-poisoning-in-the-burned-pregnant-patient-an-indication-for-hyperbaric-oxygen-therapy
#9
Derek M Culnan, Beretta Craft-Coffman, Genevieve H Bitz, Karel D Capek, Yiji Tu, William C Lineaweaver, Maggie J Kuhlmann-Capek
Carbon monoxide (CO) is a small molecule poison released as a product of incomplete combustion. Carbon monoxide binds hemoglobin, reducing oxygen delivery. This effect is exacerbated in the burned pregnant patient by fetal hemoglobin that binds CO 2.5- to 3-fold stronger than maternal hemoglobin. With no signature clinical symptom, diagnosis depends on patient injury history, elevated carboxyhemoglobin levels, and alterations in mental status. The standard of care for treatment of CO intoxication is 100% normobaric oxygen, which decreases the half-life of CO in the bloodstream from 5 hours to 1 hour...
March 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29423881/the-curious-tale-of-perioperative-precision-medicine-a-story-of-hydroxocobalamin-and-cardiac-surgery-associated-vasoplegia
#10
EDITORIAL
Miklos D Kertai, Andrew D Shaw
No abstract text is available yet for this article.
February 8, 2018: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29417853/challenges-in-the-diagnosis-of-acute-cyanide-poisoning
#11
J L Parker-Cote, J Rizer, J P Vakkalanka, S V Rege, C P Holstege
OBJECTIVE: The aim of this systematic review was to identify isolated acute cyanide poison cases and to identify reported signs, symptoms, and laboratory findings. METHODS: We searched MEDLINE, Cochrane Reviews, and Web of Science case reports and series using a number of MeSH descriptors pertaining to cyanide, toxicity, and poisonings. We excluded studies on plants, laboratory analyses, smoke inhalation poisonings, animals as well as non-English language articles and those in which data were not available...
February 8, 2018: Clinical Toxicology
https://www.readbyqxmd.com/read/29395761/cyanide-poisoning-is-a-possible-cause-of-cardiac-arrest-among-fire-victims-and-empiric-antidote-treatment-may-improve-outcomes
#12
Yasuhiko Kaita, Takehiko Tarui, Takahiro Shoji, Hiroshi Miyauchi, Yoshihiro Yamaguchi
BACKGROUND: Carbon monoxide and cyanide poisoning are important causes of death due to fire. Carbon monoxide is more regularly assessed than cyanide at the site of burn or smoke inhalation treatment due to its ease in assessment and simplicity to treat. Although several forensic studies have demonstrated the significance of cyanide poisoning in fire victims using blood cyanide levels, the association between the cause of cardiac arrest and the concentration of cyanide among fire victims has not been sufficiently investigated...
January 22, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29259082/cyanide-production-by-chromobacterium-piscinae-shields-it-from-bdellovibrio-bacteriovorus-hd100-predation
#13
Wonsik Mun, Heeun Kwon, Hansol Im, Seong Yeol Choi, Ajay K Monnappa, Robert J Mitchell
Predation of Chromobacterium piscinae by Bdellovibrio bacteriovorus HD100 was inhibited in dilute nutrient broth (DNB) but not in HEPES. Experiments showed that the effector responsible was present in the medium, as cell-free supernatants retained the ability to inhibit predation, and that the effector was not toxic to B. bacteriovorus Violacein, a bisindole secondary metabolite produced by C. piscinae , was not responsible. Further characterization of C. piscinae found that this species produces sufficient concentrations of cyanide (202 µM) when grown in DNB to inhibit the predatory activity of B...
December 19, 2017: MBio
https://www.readbyqxmd.com/read/29243660/lactate-blood-measurement-in-acute-cyanide-poisoning-effect-of-preanalytical-delay-and-hydroxocobalamin-uses-as-treatment
#14
Pascal Houzé, Marie Laforge, Frédéric J Baud
We quantify the impact of several variables including site of blood draw, delay in measurement, and use of the cyanide antidote hydroxocobalamin on detection of both normal (<2 mmol/L) and elevated (>6 mmol/L) human plasma lactate. An in vivo study assessed effects of venous or arterial origin of blood samples. Two in vitro studies assessed the effect of a 2 h delay in measuring plasma lactate concentrations, as well as the interference of low (100 μmol/L) and high (300 μmmol/L) plasma hydroxocobalamin concentrations on detecting normal and elevated levels of lactate...
January 1, 2018: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/29223724/vasoplegia-after-cardiovascular-procedures-pathophysiology-and-targeted-therapy
#15
REVIEW
Shahzad Shaefi, Aaron Mittel, John Klick, Adam Evans, Natalia S Ivascu, Jacob Gutsche, John G T Augoustides
Vasoplegic syndrome, characterized by low systemic vascular resistance and hypotension in the presence of normal or supranormal cardiac function, is a frequent complication of cardiovascular surgery. It is associated with a diffuse systemic inflammatory response and is mediated largely through cellular hyperpolarization, high levels of inducible nitric oxide, and a relative vasopressin deficiency. Cardiopulmonary bypass is a particularly strong precipitant of the vasoplegic syndrome, largely due to its association with nitric oxide production and severe vasopressin deficiency...
October 27, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29209927/hydroxocobalamin-for-the-treatment-of-cardiac-surgery-associated-vasoplegia-a-case-series
#16
Pranav R Shah, Penny S Reynolds, Nirvik Pal, Daniel Tang, Harry McCarthy, Bruce D Spiess
PURPOSE: Vasoplegia is a clinical syndrome marked by severe arteriolar vasodilatation, hypotension, and low systemic vascular resistance refractory to multiple vasopressor treatment. We report our experience with hydroxocobalamin (B12 ) infusion as a potential rescue adjunct for refractory vasoplegia during cardiopulmonary bypass (CPB). METHODS: We performed a retrospective chart review of 33 patients undergoing cardiac surgery between 1 January 2013 and 31 December 2015, who were given intravenous B12 for refractory hypotension during, or immediately following, CPB...
December 5, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29205285/vitamin-b-12-association-with-mabs-mechanism-and-potential-mitigation-strategies
#17
Cheng Du, Robert Martin, Yunping Huang, Ameya Borwankar, Zhijun Tan, Jay West, Nripen Singh, Michael Borys, Sanchayita Ghose, Richard Ludwig, Li Tao, Zheng Jian Li
Process control for manufacturing biologics is critical for ensuring product quality, safety, and lot to lot consistency of therapeutic proteins. In this study, we investigated the root cause of the pink coloration observed for various in-process pools and drug substances in the antibody manufacturing process. Vitamin B12 is covalently bound to mAbs via a cobalt-sulfur coordinate bond via the cysteine residues. The vitamin B12 was identified to attach to an IgG4 molecule at cysteine residues on light chain (Cys-214), and heavy chain (Cys-134, Cys-321, Cys-367, and Cys-425)...
April 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29164951/letter-in-response-to-acquired-methemoglobinemia-after-hydroxocobalamin-administration-in-a-patient-with-burns-and-inhalation-injury
#18
Ryland W Pace, Daniel Lugassy, Robert S Hoffman
No abstract text is available yet for this article.
November 22, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/29045954/-pulmonary-arterial-hypertension-as-leading-manifestation-of-methylmalonic-aciduria-clinical-characteristics-and-gene-testing-in-15-cases
#19
X Q Liu, H Yan, J X Qiu, C Y Zhang, J G Qi, X Zhang, H J Xiao, Y L Yang, Y H Chen, J B DU
OBJECTIVE: To deepen our understanding of Methylmalonic aciduria (MMA) associated pulmonary hypertension (PH) by analyzing the characteristics of clinical presentation, pulmonary high resolusion CT(HRCT), treatment response and gene mutation. METHODS: This study includes 15 cases of pediatric patients with MMA associated PH diagnosed and treated in Peking University First Hospital pediatric department between May 2012 and May 2016 with symptoms of PH as their leading presentation...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29038891/increase-in-circulating-holotranscobalamin-after-oral-administration-of-cyanocobalamin-or-hydroxocobalamin-in-healthy-adults-with-low-and-normal-cobalamin-status
#20
Eva Greibe, Namita Mahalle, Vijayshri Bhide, Christian W Heegaard, Sadanand Naik, Ebba Nexo
PURPOSE: To investigate the absorption of synthetic cyanocobalamin and natural occurring hydroxocobalamin in populations with low and normal cobalamin (vitamin B12) status. METHODS: We included adults with low (n = 59) and normal (n = 42) cobalamin status and measured the change in serum holotranscobalamin (ΔholoTC) before and after 2 day administration of different doses of cyanocobalamin and hydroxocobalamin (CobaSorb test). In the low status group, the test was performed using a cross-over design with identical doses of both cobalamin forms (1...
October 16, 2017: European Journal of Nutrition
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