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- Ng, Bobby G., et al.
(author)
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DPAGT1 deficiency with encephalopathy (DPAGT1-CDG) : Clinical and genetic description of 11 new patients
- 2018
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In: JIMD Reports. - Berlin, Heidelberg : Springer Berlin Heidelberg. - 2192-8312 .- 2192-8304. ; 44, s. 85-92
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Book chapter (peer-reviewed)abstract
- Pathogenic mutations in DPAGT1 cause a rare type of a congenital disorder of glycosylation termed DPAGT1-CDG or, alternatively, a milder version with only myasthenia known as DPAGT1-CMS. Fourteen disease-causing mutations in 28 patients from 10 families have previously been reported to cause the systemic form, DPAGT1-CDG. We here report on another 11 patients from 8 families and add 10 new mutations. Most patients have a very severe disease course, where common findings are pronounced muscular hypotonia, intractable epilepsy, global developmental delay/intellectual disability, and early death. We also present data on three affected females that are young adults and have a somewhat milder, stable disease. Our findings expand both the molecular and clinical knowledge of previously published data but also widen the phenotypic spectrum of DPAGT1-CDG.
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- Katritsis, Demosthenes G, et al.
(author)
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Executive Summary : European Heart Rhythm Association Consensus Document on the Management of Supraventricular Arrhythmias
- 2016
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In: Arrhythmia & electrophysiology review. - 2050-3369. ; 5:3, s. 210-224
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Journal article (peer-reviewed)abstract
- This paper is an executive summary of the full European Heart Rhythm Association (EHRA) consensus document on the management of supraventricular arrhythmias, published in Europace. It summarises developments in the field and provides recommendations for patient management, with particular emphasis on new advances since the previous European Society of Cardiology guidelines. The EHRA consensus document is available to read in full at http://europace.oxfordjournals.org.
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- Chen, Zhen, et al.
(author)
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Design, Synthesis, and Evaluation of Reversible and Irreversible Monoacylglycerol Lipase Positron Emission Tomography (PET) Tracers Using a "Tail Switching" Strategy on a Piperazinyl Azetidine Skeleton
- 2019
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In: Journal of Medicinal Chemistry. - : American Chemical Society (ACS). - 0022-2623 .- 1520-4804. ; 62:7, s. 3336-3353
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Journal article (peer-reviewed)abstract
- Monoacylglycerol lipase (MAGL) is a senile hydrolase that degrades 2-arachidonoylglycerol (2-AG) in the endocannabinoid system (eCB). Selective inhibition of MAGL has emerged as a potential therapeutic approach for the treatment of diverse pathological conditions, including chronic pain, inflammation, cancer, and neurodegeneration. Herein, we disclose a novel array of reversible and irreversible MAGL inhibitors by means of "tail switching" on a piperazinyl azetidine scaffold. We developed a lead irreversible-binding MAGL inhibitor 8 and reversible-binding compounds 17 and 37, which are amenable for radiolabeling with C-11 or F-18. [C-11]8 ([C-11]MAGL-2-11) exhibited high brain uptake and excellent binding specificity in the brain toward MAGL. Reversible radioligands [C-11]17 ([C-11]PAD) and [F-18]37 ([F-18]MAGL-4-11) also demonstrated excellent in vivo binding specificity toward MAGL in peripheral organs. This work may pave the way for the development of MAGL-targeted positron emission tomography tracers with tunability in reversible and irreversible binding mechanisms.
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- Guruprasad, Puneeth, et al.
(author)
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Integrated automated particle tracking microfluidic enables high-throughput cell deformability cytometry for red cell disorders
- 2019
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In: American Journal of Hematology. - : Wiley-Blackwell. - 0361-8609 .- 1096-8652. ; 94:2, s. 189-199
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Journal article (peer-reviewed)abstract
- Investigating individual red blood cells (RBCs) is critical to understanding hematologic diseases, as pathology often originates at the single-cell level. Many RBC disorders manifest in altered biophysical properties, such as deformability of RBCs. Due to limitations in current biophysical assays, there exists a need for high-throughput analysis of RBC deformability with single-cell resolution. To that end, we present a method that pairs a simple in vitro artificial microvasculature network system with an innovative MATLAB-based automated particle tracking program, allowing for high-throughput, single-cell deformability index (sDI) measurements of entire RBC populations. We apply our technology to quantify the sDI of RBCs from healthy volunteers, Sickle cell disease (SCD) patients, a transfusion-dependent beta thalassemia major patient, and in stored packed RBCs (pRBCs) that undergo storage lesion over 4 weeks. Moreover, our system can also measure cell size for each RBC, thereby enabling 2D analysis of cell deformability vs cell size with single cell resolution akin to flow cytometry. Our results demonstrate the clear existence of distinct biophysical RBC subpopulations with high interpatient variability in SCD as indicated by large magnitude skewness and kurtosis values of distribution, the "shifting" of sDI vs RBC size curves over transfusion cycles in beta thalassemia, and the appearance of low sDI RBC subpopulations within 4 days of pRBC storage. Overall, our system offers an inexpensive, convenient, and high-throughput method to gauge single RBC deformability and size for any RBC population and has the potential to aid in disease monitoring and transfusion guidelines for various RBC disorders.
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- Spitalnik, Steven L, et al.
(author)
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2015 proceedings of the National Heart, Lung, and Blood Institute's State of the Science in Transfusion Medicine symposium
- 2015
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In: Transfusion. - : Wiley. - 1537-2995 .- 0041-1132. ; 55:9, s. 90-2282
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Research review (peer-reviewed)abstract
- On March 25 and 26, 2015, the National Heart, Lung, and Blood Institute sponsored a meeting on the State of the Science in Transfusion Medicine on the National Institutes of Health (NIH) campus in Bethesda, Maryland, which was attended by a diverse group of 330 registrants. The meeting's goal was to identify important research questions that could be answered in the next 5 to 10 years and which would have the potential to transform the clinical practice of transfusion medicine. These questions could be addressed by basic, translational, and/or clinical research studies and were focused on four areas: the three "classical" transfusion products (i.e., red blood cells, platelets, and plasma) and blood donor issues. Before the meeting, four working groups, one for each area, prepared five major questions for discussion along with a list of five to 10 additional questions for consideration. At the meeting itself, all of these questions, and others, were discussed in keynote lectures, small-group breakout sessions, and large-group sessions with open discourse involving all meeting attendees. In addition to the final lists of questions, provided herein, the meeting attendees identified multiple overarching, cross-cutting themes that addressed issues common to all four areas; the latter are also provided. It is anticipated that addressing these scientific priorities, with careful attention to the overarching themes, will inform funding priorities developed by the NIH and provide a solid research platform for transforming the future practice of transfusion medicine.
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- Zhang, M. -D, et al.
(author)
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Comparative anatomical distribution of neuronal calcium-binding protein (NECAB) 1 and -2 in rodent and human spinal cord
- 2016
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In: Brain Structure and Function. - : Springer. - 1863-2653 .- 1863-2661. ; , s. 1-21
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Journal article (peer-reviewed)abstract
- Neuronal calcium-binding protein 1 and -2 (NECAB1/2) localize to multiple excitatory neuron populations in the mouse spinal cord. Here, we analyzed rat and human spinal cord, combining in situ hybridization and immunohistochemistry, complementing newly collated data on mouse spinal cord for direct comparisons. Necab1/2 mRNA transcripts showed complementary distribution in rodent’s spinal cord. Multiple-labeling fluorescence histochemistry with neuronal phenotypic markers localized NECAB1 to a dense fiber plexus in the dorsal horn, to neurons mainly in superficial layers and to commissural interneurons in both rodent species. NECAB1-positive (+) motor neurons were only found in mice. NECAB1 distribution in the human spinal cord was similar with the addition of NECAB1-like immunoreactivity surrounding myelinated axons. NECAB2 was mainly present in excitatory synaptic boutons in the dorsal horn of all three species, and often in calbindin-D28k+ neuronal somata. Rodent ependymal cells expressed calbindin-D28k. In humans, they instead were NECAB2+ and/or calretinin+. Our results reveal that the association of NECAB2 to excitatory neuronal circuits in the spinal cord is evolutionarily conserved across the mammalian species investigated so far. In contrast, NECAB1 expression is more heterogeneous. Thus, our study suggests that the phenotypic segregation of NECAB1 and -2 to respective excitatory and inhibitory spinal systems can underpin functional modalities in determining the fidelity of synaptic neurotransmission and neuronal responsiveness, and might bear translational relevance to humans.
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