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Sodium MRI

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https://www.readbyqxmd.com/read/27904971/mutations-in-slc5a6-associated-with-brain-immune-bone-and-intestinal-dysfunction-in-a-young-child
#1
Veedamali S Subramanian, Alexandru R Constantinescu, Paul J Benke, Hamid M Said
The human sodium-dependent multivitamin transporter (hSMVT) is a product of the SLC5A6 gene and mediates biotin, pantothenic acid, and lipoate uptake in a variety of cellular systems. We report here the identification of mutations R94X, a premature termination, and R123L, a dysfunctional amino acid change, both in exon 3 of the SLC5A6 gene in a child using whole genome-scanning. At 15 months of age, the child showed failure to thrive, microcephaly and brain changes on MRI, cerebral palsy and developmental delay, variable immunodeficiency, and severe gastro-esophageal reflux requiring a gastrostomy tube/fundoplication, osteoporosis, and pathologic bone fractures...
November 30, 2016: Human Genetics
https://www.readbyqxmd.com/read/27826248/slow-conduction-in-the-border-zones-of-patchy-fibrosis-stabilizes-the-drivers-for-atrial-fibrillation-insights-from-multi-scale-human-atrial-modeling
#2
Ross Morgan, Michael A Colman, Henry Chubb, Gunnar Seemann, Oleg V Aslanidi
Introduction: The genesis of atrial fibrillation (AF) and success of AF ablation therapy have been strongly linked with atrial fibrosis. Increasing evidence suggests that patient-specific distributions of fibrosis may determine the locations of electrical drivers (rotors) sustaining AF, but the underlying mechanisms are incompletely understood. This study aims to elucidate a missing mechanistic link between patient-specific fibrosis distributions and AF drivers. Methods: 3D atrial models integrated human atrial geometry, rule-based fiber orientation, region-specific electrophysiology, and AF-induced ionic remodeling...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27823946/clinically-mild-encephalitis-encephalopathy-with-a-reversible-splenial-lesion-of-corpus-callosum-in-chinese-children
#3
Qiong Fang, Lang Chen, Qiaobin Chen, Zhi Lin, Fang Yang
OBJECTIVE: To investigate the characteristics and etiology of mild encephalitis/encephalopathy with a reversible splenial lesion (MERS) in Chinese children. METHODS: We collected ten pediatric MERS patients from local hospital and enrolled another nineteen patients by reviewing the available literatures. The information of enrolled patients about clinical features, laboratory data, treatment strategies and prognoses were collected for further analysis. RESULTS: A total of 29 children, the median age of twenty-nine patients was (4...
November 4, 2016: Brain & Development
https://www.readbyqxmd.com/read/27805423/the-potential-of-multiparametric-mri-of-the-breast
#4
Katja Pinker, Thomas H Helbich, Elizabeth A Morris
Magnetic resonance imaging (MRI) is an essential tool in breast imaging, with multiple established indications. Dynamic contrast-enhanced MRI (DCE-MRI) is the backbone of any breast MRI protocol and has an excellent sensitivity and good specificity for breast cancer diagnosis. DCE-MRI provides high-resolution morphological information, as well as some functional information about neo-angiogenesis as a tumour-specific feature. To overcome limitations in specificity, several other functional MRI parameters have been investigated and the application of these combined parameters is defined as multiparametric MRI (mpMRI) of the breast...
November 2, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27770643/1h-magnetic-resonance-spectroscopy-study-of-glutamate-related-abnormality-in-bipolar-disorder
#5
Hiroko Kubo, Masahito Nakataki, Satsuki Sumitani, Jun-Ichi Iga, Shusuke Numata, Naomi Kameoka, Shin-Ya Watanabe, Hidehiro Umehara, Makoto Kinoshita, Masatoshi Inoshita, Mai Tamaru, Masashi Ohta, Chiaki Nakayama-Yamauchi, Yasuhiro Funakoshi, Masafumi Harada, Tetsuro Ohmori
BACKGROUND: Previous studies of patients with bipolar disorder (BD) using magnetic resonance spectroscopy (MRS) have shown neurophysiological abnormalities related to the glutamate (Glu)-glutamine (Gln) cycle, membrane turnover, and neuronal integrity, although the results were neither consistent nor conclusive. Recently it has been reported the Gln/Glu ratio is the most useful index, quantifying neuronal-glial interactions and the balance of glutamatergic metabolites In this MRS study, we elucidated the abnormalities of metabolites in a larger sample of patients with BD with a high-field MRI system...
October 8, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27758813/tuberculous-meningitis-in-an-immunocompetent-male-complicated-by-hydrocephalus
#6
Louise Dunphy, Prashanth Shetty, Rabinder Randhawa, Kharil Amir Rani, Yaw Duodu
A 39-year-old man, born in India but resident in the UK for 10 years, was travelling in America when he became feverish with an altered mentation. He reported a 10-day history of fever, photophobia, headache and fatigue. His medical history included hypothyroidism and migraine. He was a non-smoker, did not consume alcohol and denied a history of drug use. He was transferred to the emergency department. Laboratory investigations confirmed hyponatraemia (sodium 128 mmol/L). A chest radiograph confirmed no focal consolidation...
October 7, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27754180/ed-08-4-diagnosis-and-treatment-of-hypertensive-emergency-in-children
#7
Lin Shi
According to the seventh report of Joint National Committee (JNC 7), hypertensive emergency (HE), a kind of hypertensive crisis, is defined as a sudden and abrupt elevation in blood pressure so as to cause acute target organ dysfunctions, including central nervous system, cardiovascular system or kidneys. Patients with HE require immediate reduction in markedly elevated blood pressure. Currently, there are no international guidelines for children HE, so the JNC definition is commonly used. Hypertensive emergency in children is rare but a life-threatening emergency...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754097/os-21-02-connecting-tubule-glomerular-feedback-ctgf-in-renal-hemodynamics-and-blood-pressure-regulation-after-unilateral-nephrectomy-unx
#8
Cesar Romero, Sumit Monu, Glauber Cabral, Robert Knight, Oscar Carretero
OBJECTIVE: Renal hemodynamics is critical for regulation of glomerular filtration (GFR), sodium excretion and blood pressure (BP), and it depends on myogenic response, tubuloglomerular feedback (TGF) and connecting tubule-glomerular feedback (CTGF). CTGF dilates afferent arteriole in response to high sodium in connecting tubule (CNT), counteracting and resetting TGF; and increasing the plasma flow and glomerular pressure favoring sodium excretion. CTGF is initiated by epithelial sodium channel (ENaC) activation in CNT and inhibited by ENaC blocker Benzamil...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27753976/os-12-03-sglt-2-inhibition-with-dapagliflozin-reduces-tissue-sodium-content
#9
Roland Schmieder, Christian Ott, Peter Linz, Agnes Jumar, Stefanie Friedrich, Jens Titze, Matthias Hammon, Michael Uder, Iris Kistner
OBJECTIVE: Sodium tissue content by Na magnetic resonance imaging (Na-MRI) has been validated in experimental and human studies. SGLT-2 inhibition blocks the reabsorption of glucose and, in parallel, of sodium in the proximal tubular cells in a 1:1 fashion. We hypothesized that SGLT-2 inhibition in patients with type 2 diabetes leads to decreased tissue sodium content due to its pharmacological action. DESIGN AND METHOD: In a prospective, double blind, placebo controlled, cross-over trial 59 patients (61 ± 7...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27734653/osmotic-demyelination-syndrome-presenting-with-chorea
#10
T Ravindran, Paneerselvam, Radha, T Allwyn Yabesh
Osmotic demyelination syndrome is an acute shift in serum osmolality causing demyelination, which may be due to rapid correction of hyponatremia, hyperglycaemia, hypokalemia and ketoacidosis. We present a case of 55yr old female and a known diabetic presented with the choreic movements involving left upper and lower limb for 2 days without any weakness.Her blood sugar was 428mg/dl at the time of admission with wide fluctuations.Her CT Brain showed hyperdensity in the right basal ganglia and the MRI brain showed hyperintense lesion in T2 weighted images showing features suggestive of osmotic demyelination...
April 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27715437/aggressive-resection-at-the-infiltrative-margins-of-glioblastoma-facilitated-by-intraoperative-fluorescein-guidance
#11
Justin A Neira, Timothy H Ung, Jennifer S Sims, Hani R Malone, Daniel S Chow, Jorge L Samanamud, George J Zanazzi, Xiaotao Guo, Stephen G Bowden, Binsheng Zhao, Sameer A Sheth, Guy M McKhann, Michael B Sisti, Peter Canoll, Randy S D'Amico, Jeffrey N Bruce
OBJECTIVE Extent of resection is an important prognostic factor in patients undergoing surgery for glioblastoma (GBM). Recent evidence suggests that intravenously administered fluorescein sodium associates with tumor tissue, facilitating safe maximal resection of GBM. In this study, the authors evaluate the safety and utility of intraoperative fluorescein guidance for the prediction of histopathological alteration both in the contrast-enhancing (CE) regions, where this relationship has been established, and into the non-CE (NCE), diffusely infiltrated margins...
October 7, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27698507/case-study-of-fatal-stroke-following-intranasal-lidocaine
#12
Daniel L Moellentin, Dale Stewart, James Barbour
A 39-year-old man presented with new onset right hemiparesis and aphasia within an hour of using approximately 120 mL lidocaine 4% topical solution intranasally. Lidocaine had been prescribed over a 3-week period for pain due to multiple debridements of the nasal septum. A total of 650 mL of 4% lidocaine (26 g) had been dispensed to the patient during this time. The patient had a significant history of drug abuse, including snorting crushed tablets. Otherwise he was a healthy man with no chronic diseases or conditions...
September 2016: Hospital Pharmacy
https://www.readbyqxmd.com/read/27670140/quantitative-chemical-exchange-saturation-transfer-mri-of-intervertebral-disc-in-a-porcine-model
#13
Zhengwei Zhou, Maxim Bez, Wafa Tawackoli, Joseph Giaconi, Dmitriy Sheyn, Sandra de Mel, Marcel M Maya, Barry D Pressman, Zulma Gazit, Gadi Pelled, Dan Gazit, Debiao Li
PURPOSE: Previous studies have associated low pH in intervertebral discs (IVDs) with discogenic back pain. The purpose of this study was to determine whether quantitative CEST (qCEST) MRI can be used to detect pH changes in IVDs in vivo. METHODS: The exchange rate ksw between glycosaminoglycan (GAG) protons and water protons was determined from qCEST analysis. Its dependence on pH value was investigated in GAG phantoms with varying pH and concentrations. The relationship between ksw and pH was studied further in vivo in a porcine model on a 3T MR scanner and validated using a pH meter...
December 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27668577/efficacy-of-intravenous-administration-of-hyaluronan-sodium-chondroitin-sulfate-and-n-acetyl-d-glucosamine-for-prevention-or-treatment-of-osteoarthritis-in-horses
#14
David D Frisbie, C Wayne McIlwraith, Christopher E Kawcak, Natasha M Werpy
OBJECTIVE To evaluate the efficacy of IV administration of a product containing hyaluronan, sodium chondroitin sulfate, and N-acetyl-d-glucosamine for prevention or treatment of osteoarthritis in horses. ANIMALS 32 healthy 2- to 5-year-old horses. PROCEDURES The study involved 2 portions. To evaluate prophylactic efficacy of the test product, horses received 5 mL of the product (n = 8) or saline (0.9% NaCl) solution (8; placebo) IV every fifth day, starting on day 0 (when osteoarthritis was induced in the middle carpal joint of 1 forelimb) and ending on day 70...
October 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27667478/spatial-variation-of-fixed-charge-density-in-knee-joint-cartilage-from-sodium-mri-implication-on-knee-joint-mechanics-under-static-loading
#15
Lasse P Räsänen, Petri Tanska, Mika E Mononen, Eveliina Lammentausta, Štefan Zbýň, Mikko S Venäläinen, Pavol Szomolanyi, Corrinus C van Donkelaar, Jukka S Jurvelin, Siegfried Trattnig, Miika T Nieminen, Rami K Korhonen
The effects of fixed charge density (FCD) and cartilage swelling have not been demonstrated on cartilage mechanics on knee joint level before. In this study, we present how the spatial and local variations of FCD affects the mechanical response of the knee joint cartilage during standing (half of the body weight, 13 minutes) using finite element (FE) modeling. The FCD distribution of tibial cartilage of an asymptomatic subject was determined using sodium ((23)Na) MRI at 7T and implemented into a 3-D FE-model of the knee joint (Subject-specific model, FCD: 0...
October 3, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27643373/os-12-03-sglt-2-inhibition-with-dapagliflozin-reduces-tissue-sodium-content
#16
Roland Schmieder, Christian Ott, Peter Linz, Agnes Jumar, Stefanie Friedrich, Jens Titze, Matthias Hammon, Michael Uder, Iris Kistner
OBJECTIVE: Sodium tissue content by Na magnetic resonance imaging (Na-MRI) has been validated in experimental and human studies. SGLT-2 inhibition blocks the reabsorption of glucose and, in parallel, of sodium in the proximal tubular cells in a 1:1 fashion. We hypothesized that SGLT-2 inhibition in patients with type 2 diabetes leads to decreased tissue sodium content due to its pharmacological action. DESIGN AND METHOD: In a prospective, double blind, placebo controlled, cross-over trial 59 patients (61 ± 7...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27643137/ed-08-4-diagnosis-and-treatment-of-hypertensive-emergency-in-children
#17
Lin Shi
According to the seventh report of Joint National Committee (JNC 7), hypertensive emergency (HE), a kind of hypertensive crisis, is defined as a sudden and abrupt elevation in blood pressure so as to cause acute target organ dysfunctions, including central nervous system, cardiovascular system or kidneys. Patients with HE require immediate reduction in markedly elevated blood pressure. Currently, there are no international guidelines for children HE, so the JNC definition is commonly used. Hypertensive emergency in children is rare but a life-threatening emergency...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27643022/os-21-02-connecting-tubule-glomerular-feedback-ctgf-in-renal-hemodynamics-and-blood-pressure-regulation-after-unilateral-nephrectomy-unx
#18
Cesar Romero, Sumit Monu, Glauber Cabral, Robert Knight, Oscar Carretero
OBJECTIVE: Renal hemodynamics is critical for regulation of glomerular filtration (GFR), sodium excretion and blood pressure (BP), and it depends on myogenic response, tubuloglomerular feedback (TGF) and connecting tubule-glomerular feedback (CTGF). CTGF dilates afferent arteriole in response to high sodium in connecting tubule (CNT), counteracting and resetting TGF; and increasing the plasma flow and glomerular pressure favoring sodium excretion. CTGF is initiated by epithelial sodium channel (ENaC) activation in CNT and inhibited by ENaC blocker Benzamil...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27635269/siadh-induced-by-pharyngeal-squamous-cell-carcinoma-case-report-and-literature-review
#19
Hafiz Muhammad Sharjeel Arshad, Aleida Rodriguez, Faten Suhail
Background. The Syndrome of Inappropriate Antidiuretic Hormone (SIADH) is considered to be the most common cause of euvolemic hyponatremia. The most common malignancy associated with SIADH is small cell lung cancer. We present a rare case of a patient with SIADH secondary to well differentiated squamous cell carcinoma of the naso-oropharynx. Case. A 46-year-old Caucasian woman presented to emergency department with four-week history of progressive dysphagia. On examination, she was found to have a pharyngeal mass...
2016: Case Reports in Nephrology
https://www.readbyqxmd.com/read/27603336/cerebral-salt-wasting-syndrome-in-a-child-with-wernicke-encephalopathy-treated-with-fludrocortisone-therapy-a-case-report
#20
Min Jeong Han, Soon Chul Kim, Chan Uhng Joo, Sun Jun Kim
RATIONALE FOR THIS CASE REPORT: Cerebral Salt-Wasting Syndrome (CSWS) is characterized by hyponatremia and sodium wasting in the urine. These conditions are triggered by various neurosurgical disorders such as subarachnoid hemorrhage, brain tumor, head injury, and brain surgery. To our knowledge, CSWS caused by Wernicke encephalopathy (WE) has been rarely reported. PRESENTING CONCERNS OF THE PATIENT: A 2-year-old male patient presented to our hospital due to a seizure attack...
September 2016: Medicine (Baltimore)
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